@article{WengenmayerKrikovMuelleretal.2011, author = {Wengenmayer, Christina and Krikov, Maxim and Mueller, Susanne and Lucht, Kristin and Villringer, Arno and Hocher, Berthold and Unger, Thomas and Thoene-Reineke, Christa}, title = {Novel therapy approach in primary stroke prevention simultaneous inhibition of endothelin converting enzyme and neutral endopeptidase in spontaneously hypertensive, stroke-prone rats improves survival}, series = {Neurological research : a journal of progress in neurosurgery and neurosciences}, volume = {33}, journal = {Neurological research : a journal of progress in neurosurgery and neurosciences}, number = {2}, publisher = {Routledge, Taylor \& Francis Group}, address = {Leeds}, issn = {0161-6412}, doi = {10.1179/016164111X12881719352534}, pages = {201 -- 207}, year = {2011}, abstract = {Objectives: Stroke, frequently a consequence of hypertension, is one of the leading causes of death and neurological disabilities worldwide. In the ischemic brain, levels of endothelin-1, one of the most potent vasoconstrictors, are raised. Anti-inflammatory and neuroprotective effects of endothelin antagonists after stroke have been described in literature. Based on these findings, we investigated the protective effect of the endothelin converting enzyme/neutral endopeptidase blocker, SLV 338, in salt-loaded, stroke-prone, spontaneously hypertensive rats. Methods: Male, 8-week-old spontaneously hypertensive stroke-prone rats were put on a high salt diet and treated with either 30 mg/kg or 100 mg/kg SLV 338 or vehicle for 27 weeks. Blood pressure, neurological outcome, body weight, and mortality were investigated throughout treatment. In weeks 1 and 9, animals were housed in metabolic cages for collection of urinary and blood samples and assessment of salt water and food intake. In weeks 22 and 27, additional blood samples were taken. At the end of the study, all brains were analyzed using magnetic resonance imaging. Results: SLV 338 was well tolerated in all animals. Neurological outcome and infarct size were similar in all groups. Albuminuria was considerably delayed and the incidence of stroke significantly lowered in treated animals. In spontaneously hypertensive stroke-prone rats, treatment with SLV 338 significantly (P=0.01) improved survival in comparison to the vehicle treated group in a blood pressure-independent manner. Discussion: Our data in spontaneously hypertensive stroke-prone rats demonstrate that combined endothelin converting enzyme/neutral endopeptidase inhibition could offer a new therapeutic approach for primary stroke prevention and improvement of mortality. The mechanism seems to be blood pressure-independent.}, language = {en} } @misc{Wels2011, author = {Wels, Volkhard}, title = {Triviale K{\"u}nste : die humanistische Reform der grammatischen, dialektischen und rhetorischen Ausbildung an der Wende zum 16. Jahrhundert. - [2. Aufl.]}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-51433}, year = {2011}, abstract = {Die Arbeit beschreibt die humanistische Reform des 'Triviums', also der grammatischen, dialektischen (logisch-argumentativen) und rhetorischen Ausbildung, wie sie sich in dem Zeitraum von 1480 bis 1540 an Schulen und Universit{\"a}ten durchsetzte. Die Arbeit ist dabei sowohl historisch wie systematisch angelegt, indem sie die Lehrinhalte der jeweiligen Kunst an ausgew{\"a}hlten Lehrb{\"u}chern darstellt, gleichzeitig aber unter st{\"a}ndigem R{\"u}ckbezug auf die scholastisch-mittelalterliche Tradition die humanistischen Neuerungen davon abgrenzt. Im Zentrum stehen Werke von Lorenzo Valla, Rudolf Agricola, Erasmus, Juan Luis Vives und Philipp Melanchthon. Es stellt sich dabei heraus, daß die humanistischen Neuerungen in erster Linie die Praxisbezogenheit des Triviums betreffen, erst aus dieser ergeben sich dann die inhaltlichen Neuerungen. Unter Praxisbezogenheit ist dabei sowohl die Ableitung von Grammatik, Dialektik und Rhetorik aus der Beobachtung ihrer immer schon vorg{\"a}ngigen Anwendung zu verstehen, als auch ihre Anwendung zum Zweck der sprachlichen, argumentativ-logischen und rhetorischen Analyse. D.h. das grammatische, dialektische und rhetorische Regelwerk wird auf deskriptivem Wege gewonnen, um wiederum in der Analyse auf die Praxis zur{\"u}ckgewendet zu werden. Dieser Analyse werden dabei von allt{\"a}glichen {\"A}ußerungen, politischen, religi{\"o}sen oder sonstigen sachlichen Texten bis hin zu literarischen Werken alles unterzogen. In einem letzten Teil stellt die Arbeit drei solcher Analysen vor und versucht sich schließlich selbst an einer dialektisch-rhetorischen Analyse dreier dramatischer Bearbeitungen der Parabel vom verlorenen Sohn.}, language = {de} } @article{Wels2011, author = {Wels, Volkhard}, title = {Poetry as reasoning technique an interpretation of the Aristotelian averroes processing "Poetics" in its Latin transfers}, series = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, volume = {133}, journal = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, number = {2}, publisher = {Niemeyer}, address = {T{\"u}bingen}, issn = {0005-8076}, pages = {265 -- 289}, year = {2011}, language = {de} } @article{Wels2011, author = {Wels, Volkhard}, title = {The poetics as part of aristotle's organon}, series = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, volume = {133}, journal = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, number = {3-4}, publisher = {Niemeyer}, address = {T{\"u}bingen}, issn = {0005-8076}, pages = {470 -- 486}, year = {2011}, language = {de} } @article{Wels2011, author = {Wels, Volkhard}, title = {Dichtung als Argumentationstechnik}, series = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, volume = {133}, journal = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, number = {2}, publisher = {de Gruyter}, address = {Berlin , New York, NY}, issn = {0005-8076}, doi = {10.1515/bgsl.2011.029}, pages = {265 -- 289}, year = {2011}, abstract = {Der Aufsatz zeigt, dass es sich bei der averroischen Bearbeitung der aristotelischen ‚Poetik' um eine in sich konsistente Theorie der Dichtung handelt, die allerdings mit der aristotelischen Konzeption der Dichtung nur wenig zu tun hat. Ausgehend von der {\"U}bersetzung von ‚Trag{\"o}die' und ‚Kom{\"o}die' mit ‚Lob' und ‚Tadel' entwickelt Averroes einen Begriff von Dichtung als moralphilosophisches Argument zum Lob der Tugend und zum Tadel des Lasters. Im Mittelpunkt steht die Interpretation des aristotelischen Begriffs der mimesis als similitudo, das heißt als Gleichnis. Als gleichnishaftes Argument ist Dichtung nur graduell von anderen argumentativen Formen wie der demonstrativen Logik und der Rhetorik unterschieden.}, language = {de} } @article{Wels2011, author = {Wels, Volkhard}, title = {Die Poetik als Teil des aristotelischen Organon}, series = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, volume = {133}, journal = {Beitr{\"a}ge zur Geschichte der deutschen Sprache und Literatur}, number = {3-4}, publisher = {de Gruyter}, address = {Berlin , New York, NY}, issn = {0005-8076}, doi = {10.1515/bgsl.2011.056}, pages = {470 -- 486}, year = {2011}, abstract = {Der Aufsatz umreißt die Wirkung von Averroes' Bearbeitung der aristotelischen ‚Poetik' als argumentativer Disziplin. Beginnend mit Al-Farabi und Al-Gazali im zehnten Jahrhundert wird die ‚Poetik' den logischen Disziplinen des ‚Organon' zugerechnet. W{\"a}hrend die Theorie eines ‚poetischen Syllogismus' nicht rezipiert worden ist, wurde der argumentative Status der Dichtung vom zw{\"o}lften Jahrhundert an auch im lateinischen Westen bekannt. Mit unterschiedlichen Begr{\"u}ndungen {\"u}bernahmen Dominicus Gundissalinus, Vincenz von Beauvais, Albertus Magnus, Roger Bacon und Thomas von Aquin die Klassifizierung der Poetik als argumentative Disziplin. Am Ende des Aufsatzes steht ein Ausblick auf Coluccio Salutatis ‚De laboribus Herculis' und die humanistische Rezeption dieser Tradition.}, language = {de} } @misc{Wels2011, author = {Wels, Volkhard}, title = {Dichtung als Argumentationstechnik}, series = {Postprints der Universit{\"a}t Potsdam : Philosophische Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Philosophische Reihe}, number = {96}, issn = {1866-8380}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87693}, pages = {25}, year = {2011}, abstract = {Der Aufsatz zeigt, dass es sich bei der averroischen Bearbeitung der aristotelischen ‚Poetik' um eine in sich konsistente Theorie der Dichtung handelt, die allerdings mit der aristotelischen Konzeption der Dichtung nur wenig zu tun hat. Ausgehend von der {\"U}bersetzung von ‚Trag{\"o}die' und ‚Kom{\"o}die' mit ‚Lob' und ‚Tadel' entwickelt Averroes einen Begriff von Dichtung als moralphilosophisches Argument zum Lob der Tugend und zum Tadel des Lasters. Im Mittelpunkt steht die Interpretation des aristotelischen Begriffs der mimesis als similitudo, das heißt als Gleichnis. Als gleichnishaftes Argument ist Dichtung nur graduell von anderen argumentativen Formen wie der demonstrativen Logik und der Rhetorik unterschieden.}, language = {de} } @misc{Wels2011, author = {Wels, Volkhard}, title = {Die Poetik als Teil des aristotelischen Organon}, series = {Postprints der Universit{\"a}t Potsdam : Philosophische Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Philosophische Reihe}, number = {97}, issn = {1866-8380}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88666}, pages = {17}, year = {2011}, abstract = {Der Aufsatz umreißt die Wirkung von Averroes' Bearbeitung der aristotelischen ‚Poetik' als argumentativer Disziplin. Beginnend mit Al-Farabi und Al-Gazali im zehnten Jahrhundert wird die ‚Poetik' den logischen Disziplinen des ‚Organon' zugerechnet. W{\"a}hrend die Theorie eines ‚poetischen Syllogismus' nicht rezipiert worden ist, wurde der argumentative Status der Dichtung vom zw{\"o}lften Jahrhundert an auch im lateinischen Westen bekannt. Mit unterschiedlichen Begr{\"u}ndungen {\"u}bernahmen Dominicus Gundissalinus, Vincenz von Beauvais, Albertus Magnus, Roger Bacon und Thomas von Aquin die Klassifizierung der Poetik als argumentative Disziplin. Am Ende des Aufsatzes steht ein Ausblick auf Coluccio Salutatis ‚De laboribus Herculis' und die humanistische Rezeption dieser Tradition.}, language = {de} } @unpublished{WellsteinSchroederEsselbachReinekingetal.2011, author = {Wellstein, Camilla and Schr{\"o}der-Esselbach, Boris and Reineking, Bjoern and Zimmermann, Niklaus E.}, title = {Understanding species and community response to environmental change - A functional trait perspective}, series = {Agriculture, ecosystems \& environment : an international journal for scientific research on the relationship of agriculture and food production to the biosphere}, volume = {145}, journal = {Agriculture, ecosystems \& environment : an international journal for scientific research on the relationship of agriculture and food production to the biosphere}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0167-8809}, doi = {10.1016/j.agee.2011.06.024}, pages = {1 -- 4}, year = {2011}, language = {en} } @article{WellertTierschKoetzetal.2011, author = {Wellert, Stefan and Tiersch, Brigitte and Koetz, Joachim and Richardt, Andre and Lapp, Alain and Holderer, Olaf and Gaeb, Juergen and Blum, Marc-Michael and Schulreich, Christoph and Stehle, Ralf and Hellweg, Thomas}, title = {The DFPase from Loligo vulgaris in sugar surfactant-based bicontinuous microemulsions structure, dynamics, and enzyme activity}, series = {European biophysics journal : with biophysics letters ; an international journal of biophysics}, volume = {40}, journal = {European biophysics journal : with biophysics letters ; an international journal of biophysics}, number = {6}, publisher = {Springer}, address = {New York}, issn = {0175-7571}, doi = {10.1007/s00249-011-0689-0}, pages = {761 -- 774}, year = {2011}, abstract = {The enzyme diisopropyl fluorophosphatase (DFPase) from the squid Loligo vulgaris is of great interest because of its ability to catalyze the hydrolysis of highly toxic organophosphates. In this work, the enzyme structure in solution (native state) was studied by use of different scattering methods. The results are compared with those from hydrodynamic model calculations based on the DFPase crystal structure. Bicontinuous microemulsions made of sugar surfactants are discussed as host systems for the DFPase. The microemulsion remains stable in the presence of the enzyme, which is shown by means of scattering experiments. Moreover, activity assays reveal that the DFPase still has high activity in this complex reaction medium. To complement the scattering experiments cryo-SEM was also employed to study the microemulsion structure.}, language = {en} } @book{WeissMehdeKriegeretal.2011, author = {Weiß, Norman and Mehde, Veith and Krieger, Heike and Franzen, Martin and Mock, Sebastian and Altenhain, Karsten}, title = {Rechtsentwicklungen im vereinten Deutschland}, series = {Potsdamer Studien zu Staat, Recht und Politik}, journal = {Potsdamer Studien zu Staat, Recht und Politik}, editor = {Weiß, Norman}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-018-2}, issn = {1867-2663}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-36180}, publisher = {Universit{\"a}t Potsdam}, pages = {145}, year = {2011}, abstract = {Der Band enth{\"a}lt die Vortr{\"a}ge einer Konferenz vom November 2009 in Potsdam. Die Texte untersuchen anhand ausgew{\"a}hlter Beispiele die Entwicklungen der zur{\"u}ckliegenden zwanzig Jahre im Zivilrecht, Strafrecht und {\"o}ffentlichen Recht. Die Bundesrepublik Deutschland sieht sich seit der Wiedervereinigung und dem Ende des Kalten Krieges in einer ganz neuen Situation. Dies gilt f{\"u}r den v{\"o}lkerrechtlichen Rahmen ihrer Außenpolitik, f{\"u}r den Wettbewerb der Rechtsordnungen, f{\"u}r die mit erh{\"o}hter Dynamik fortschreitende europ{\"a}ische Einigung und ihre Konsequenzen. Die bei der Grundrechtsinterpretation im Mehrebenensystem auftauchenden Divergenzen und die Auswirkungen technischer Neuerungen auf das Sozialverhalten pr{\"a}gen Rechtswirklichkeit und Rechtsdogmatik.}, language = {de} } @article{Weiss2011, author = {Weiß, Norman}, title = {Der UN-Menschenrechtsschutz zehn Jahre nach dem Millenniumsgipfel - neue Strukturen und neue Herausforderungen - auch neue Chancen?}, series = {Die Vereinten Nationen zehn Jahre nach dem Millenniumsgipfel 2000 - eine Bilanz}, volume = {2011}, journal = {Die Vereinten Nationen zehn Jahre nach dem Millenniumsgipfel 2000 - eine Bilanz}, number = {9}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-101581}, pages = {53 -- 74}, year = {2011}, abstract = {I. Einleitung: Menschenrechtsschutz als wichtiges Ziel der Vereinten Nationen und Voraussetzung f{\"u}r Sicherheit und Frieden II. Der vertragsbasierte Menschenrechtsschutz III. Der chartabasierte Menschenrechtsschutz IV. Ausblick}, language = {de} } @article{Weiss2011, author = {Weiß, Norman}, title = {Neue Wege f{\"u}r die deutsche UN-Forschung?}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-61223}, pages = {381 -- 391}, year = {2011}, abstract = {Inhalt: - I. Einleitung - II. Bestandsaufnahme - III. Perspektiven - 1. {\"U}berblick - 2. Forschungsrat der DGVN - 3. Forschungsthemen - IV. Schluß}, language = {de} } @article{Weiss2011, author = {Weiß, Norman}, title = {Rechtsentwicklungen in der Bundesrepublik Deutschland nach 1990}, series = {Potsdamer Studien zu Staat, Recht und Politik}, journal = {Potsdamer Studien zu Staat, Recht und Politik}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1867-2663}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60708}, pages = {7 -- 32}, year = {2011}, language = {de} } @phdthesis{Weiss2011, author = {Weiß, Julia}, title = {Computer assisted proteomics in a systems biology context}, address = {Potsdam}, pages = {VIII, 138, XVII S.}, year = {2011}, language = {en} } @phdthesis{Weiss2011, author = {Weiß, Jan}, title = {Synthesis and self-assembly of multiple thermoresponsive amphiphilic block copolymers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53360}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {In the present thesis, the self-assembly of multi thermoresponsive block copolymers in dilute aqueous solution was investigated by a combination of turbidimetry, dynamic light scattering, TEM measurements, NMR as well as fluorescence spectroscopy. The successive conversion of such block copolymers from a hydrophilic into a hydrophobic state includes intermediate amphiphilic states with a variable hydrophilic-to-lipophilic balance. As a result, the self-organization is not following an all-or-none principle but a multistep aggregation in dilute solution was observed. The synthesis of double thermoresponsive diblock copolymers as well as triple thermoresponsive triblock copolymers was realized using twofold-TMS labeled RAFT agents which provide direct information about the average molar mass as well as residual end group functionality from a routine proton NMR spectrum. First a set of double thermosensitive diblock copolymers poly(N-n-propylacrylamide)-b-poly(N-ethylacrylamide) was synthesized which differed only in the relative size of the two blocks. Depending on the relative block lengths, different aggregation pathways were found. Furthermore, the complementary TMS-labeled end groups served as NMR-probes for the self-assembly of these diblock copolymers in dilute solution. Reversible, temperature sensitive peak splitting of the TMS-signals in NMR spectroscopy was indicative for the formation of mixed star-/flower-like micelles in some cases. Moreover, triple thermoresponsive triblock copolymers from poly(N-n-propylacrylamide) (A), poly(methoxydiethylene glycol acrylate) (B) and poly(N-ethylacrylamide) (C) were obtained from sequential RAFT polymerization in all possible block sequences (ABC, BAC, ACB). Their self-organization behavior in dilute aqueous solution was found to be rather complex and dependent on the positioning of the different blocks within the terpolymers. Especially the localization of the low-LCST block (A) had a large influence on the aggregation behavior. Above the first cloud point, aggregates were only observed when the A block was located at one terminus. Once placed in the middle, unimolecular micelles were observed which showed aggregation only above the second phase transition temperature of the B block. Carrier abilities of such triple thermosensitive triblock copolymers tested in fluorescence spectroscopy, using the solvatochromic dye Nile Red, suggested that the hydrophobic probe is less efficiently incorporated by the polymer with the BAC sequence as compared to ABC or ACB polymers above the first phase transition temperature. In addition, due to the problem of increasing loss of end group functionality during the subsequent polymerization steps, a novel concept for the one-step synthesis of multi thermoresponsive block copolymers was developed. This allowed to synthesize double thermoresponsive di- and triblock copolymers in a single polymerization step. The copolymerization of different N-substituted maleimides with a thermosensitive styrene derivative (4-vinylbenzyl methoxytetrakis(oxyethylene) ether) led to alternating copolymers with variable LCST. Consequently, an excess of this styrene-based monomer allowed the synthesis of double thermoresponsive tapered block copolymers in a single polymerization step.}, language = {en} } @article{WeizIshidaMakoweretal.2011, author = {Weiz, Annika R. and Ishida, Keishi and Makower, Katharina and Ziemert, Nadine and Hertweck, Christian and Dittmann-Th{\"u}nemann, Elke}, title = {Leader Peptide and a Membrane Protein Scaffold Guide the Biosynthesis of the Tricyclic Peptide Microviridin}, series = {Chemistry \& biology}, volume = {18}, journal = {Chemistry \& biology}, number = {11}, publisher = {Cell Press}, address = {Cambridge}, issn = {1074-5521}, doi = {10.1016/j.chembiol.2011.09.011}, pages = {1413 -- 1421}, year = {2011}, abstract = {Microviridins are unique protease inhibitors from bloom-forming cyanobacteria that have both ecological and pharmacological relevance. Their peptide backbones are produced ribosomally, and ATP grasp ligases introduce omega-ester and omega-amide bonds to yield rare cage-like structures. Bioinformatic analysis of the microviridin biosynthesis gene cluster suggests a novel type of processing machinery, which could rationalize the challenging in vivo/in vitro reconstitution of the pathway. In this work, we report the establishment of a minimal expression system for microviridins. Through bioinformatics and mutational analysis of the MdnA leader peptide we identified and characterized a strictly conserved binding motif that is specific for microviridin ligases. Furthermore, we showed that the ABC transporter MdnE is crucial for cyclization and processing of microviridins and demonstrated that MdnE is essential for stability of the microviridin biosynthesis complex.}, language = {en} } @article{WeisseBerendonkKamjunkeetal.2011, author = {Weisse, Thomas and Berendonk, Thomas U. and Kamjunke, Norbert and Moser, Michael and Scheffel, U. and Stadler, P. and Weithoff, Guntram}, title = {Significant habitat effects influence protist fitness evidence for local adaptation from acidic mining lakes}, series = {Ecosphere : the magazine of the International Ecology University}, volume = {2}, journal = {Ecosphere : the magazine of the International Ecology University}, number = {12}, publisher = {Wiley}, address = {Washington}, issn = {2150-8925}, doi = {10.1890/ES11-00157.1}, pages = {14}, year = {2011}, abstract = {It is currently controversially discussed if the same freshwater microorganisms occur worldwide wherever their required habitats are realized, i.e., without any adaptation to local conditions below the species level. We performed laboratory experiments with flagellates and ciliates from three acidic mining lakes (AML, pH similar to 2.7) to investigate if similar habitats may affect similar organisms differently. Such man-made lakes provide suitable ecosystem models to test for the significance of strong habitat selection. To this end, we analyzed the growth response of three protist taxa (three strains of the phytoflagellate Chlamydomonas acidophila, two isolates of the phytoflagellate Ochromonas and two species of the ciliate genus Oxytricha) by exposing them to lake water of their origin and from the two other AML in a cross-factorial design. Population growth rates were measured as a proxy for their fitness. Results revealed significant effects of strain, lake (= habitat), and strain X habitat interaction. In the environmentally most adverse AML, all three protist taxa were locally adapted. In conclusion, our study demonstrates that (1) the same habitat may affect strains of the same species differently and that (2) similar habitats may harbor ecophysiologically different strains or species. These results contradict the 'everything is everywhere' paradigm.}, language = {en} } @article{WeissLaschewsky2011, author = {Weiss, Jan and Laschewsky, Andr{\´e}}, title = {Temperature-induced self-assembly of triple-responsive triblock copolymers in aqueous solutions}, series = {Langmuir}, volume = {27}, journal = {Langmuir}, number = {8}, publisher = {American Chemical Society}, address = {Washington}, issn = {0743-7463}, doi = {10.1021/la200115p}, pages = {4465 -- 4473}, year = {2011}, abstract = {A series of triple-thermoresponsive triblock copolymers from poly(N-n-propylacrylamide) (PNPAM, A), poly(methoxydiethylene glycol acrylate) (PMDEGA, B), and poly(N-ethylacrylamide) (PNEAM, C) was synthesized by sequential reversible addition-fragmentation chain transfer polymerizations. Polymers of differing block sequences, ABC, BAC, and ACB, with increasing phase transition temperatures in the order A < B < C were prepared. Their aggregation behavior in dilute aqueous solution was investigated using dynamic light scattering, turbidimetry, and NMR spectroscopy. The self-organization of such polymers was found to dependent strongly on the block sequence. While polymers with a terminal low-LCST (lower critical solution temperature) block undergo aggregation above the first phase transition temperature at 20-25 degrees C, triblock copolymers with the low-LCST block in the middle show aggregation only above the second phase transition. The collapse of the middle block is not sufficient to induce aggregation but produces instead stable, unimolecular micelles with a collapsed middle block, as supported by NMR and fluorescence probe data. Continued heating of all copolymers led to two additional thermal transitions at 40-55 and 70-80 degrees C, which could be correlated to the phase transitions of the B and C blocks, respectively. All polymers show a high tendency for cluster formation, once aggregation is induced. The carrier abilities of the triple responsive triblock copolymers for hydrophobic agents were probed with the solvatochromic fluorescence dye Nile Red. With passing through the first thermal transition, the block copolymers are capable of solubilizing Nile Red. In the case of block copolymers with sequences ABC or ACB, which bear the low-LCST block at one terminus, notable amounts of dye are solubilized already at this stage. In contrast, the hydrophobic probe is much less efficiently incorporated by the BAC triblock copolymer, which forms unimolecular micelles. Only after the collapse of the B block, when reaching the second phase transition at about 45 degrees C, does aggregation occur and solubilization becomes efficient. In the case of ABC and ACB polymers, the hydrophobic probe seems to partition between the originally collapsed A chains and the additional hydrophobic chains formed after the collapse of the less hydrophobic B block.}, language = {en} } @article{WeissBoettcherLaschewsky2011, author = {Weiss, Jan and B{\"o}ttcher, Christoph and Laschewsky, Andr{\´e}}, title = {Self-assembly of double thermoresponsive block copolymers end-capped with complementary trimethylsilyl groups}, series = {Soft matter}, volume = {7}, journal = {Soft matter}, number = {2}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1744-683X}, doi = {10.1039/c0sm00531b}, pages = {483 -- 492}, year = {2011}, abstract = {A set of double thermoresponsive diblock copolymers poly(N-n-propylacrylamide)-block-poly(N-ethylacrylamide) (PNPAM-b-PNEAM) was synthesised by sequential reversible addition-fragmentation chain transfer (RAFT) polymerisations. Using a twofold trimethylsilyl (TMS)-labeled RAFT-agent, the relative size of the two blocks was varied. While soluble as unimers below 15 degrees C, all copolymers exhibited thermally induced two-step self-assembly in water, due to distinct lower critical solution temperature (LCST) phase transitions of PNPAM (around 20 degrees C) and PNEAM (around 70 degrees C). Their temperature-dependent self-organisation in dilute aqueous solution was studied by turbidimetry, dynamic light scattering, transmission electron microscopy, and (1)H NMR spectroscopy. The copolymers show distinct, two-step self-organisation behaviour with respect to transition temperatures, aggregate type and size, which can be correlated to the relative lengths of the low and high LCST blocks. For polymers having short blocks with low LCST, the first thermal transition induces the formation of individual micelles. Further heating above the second thermal transition results reversibly either in a shrink of the micelle size or in aggregation of the micelles, with hydrodynamic diameters below 250 nm. In contrast in the case of polymers having a long block with low LCST, the first thermal transition already leads to clusters of micelles, while the second thermal transition makes the clusters shrink. Noteworthy, the twofold TMS-labeled end groups report not only on the molar masses of the polymers, but can simultaneously serve as NMR-probes for the self-assembly process. The signal of the TMS-aryl end group displays a reversible temperature dependent, two-step splitting that is indicative of the self-organisation of the block copolymers.}, language = {en} } @article{WeissHuisinga2011, author = {Weiss, Andrea Y. and Huisinga, Wilhelm}, title = {Error-controlled global sensitivity analysis of ordinary differential equations}, series = {Journal of computational physics}, volume = {230}, journal = {Journal of computational physics}, number = {17}, publisher = {Elsevier}, address = {San Diego}, issn = {0021-9991}, doi = {10.1016/j.jcp.2011.05.011}, pages = {6824 -- 6842}, year = {2011}, abstract = {We propose a novel strategy for global sensitivity analysis of ordinary differential equations. It is based on an error-controlled solution of the partial differential equation (PDE) that describes the evolution of the probability density function associated with the input uncertainty/variability. The density yields a more accurate estimate of the output uncertainty/variability, where not only some observables (such as mean and variance) but also structural properties (e.g., skewness, heavy tails, bi-modality) can be resolved up to a selected accuracy. For the adaptive solution of the PDE Cauchy problem we use the Rothe method with multiplicative error correction, which was originally developed for the solution of parabolic PDEs. We show that, unlike in parabolic problems, conservation properties necessitate a coupling of temporal and spatial accuracy to avoid accumulation of spatial approximation errors over time. We provide convergence conditions for the numerical scheme and suggest an implementation using approximate approximations for spatial discretization to efficiently resolve the coupling of temporal and spatial accuracy. The performance of the method is studied by means of low-dimensional case studies. The favorable properties of the spatial discretization technique suggest that this may be the starting point for an error-controlled sensitivity analysis in higher dimensions.}, language = {en} } @article{Weinz2011, author = {Weinz, Irene}, title = {Die Mitwirkung der Zivilgesellschaft in den Vereinten Nationen}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60934}, pages = {31 -- 39}, year = {2011}, abstract = {Inhalt: - Einleitung - Der Status Quo: Die Mitarbeit von NGOs in der UNO - Der Bericht des Cardoso-Panels - Kritikpunkte - Ausblick - Fazit - Literatur}, language = {de} } @misc{Weinbaum2011, author = {Weinbaum, Laurence}, title = {Israel im Arabischen Fr{\"u}hling}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52955}, year = {2011}, abstract = {Die Konsequenzen des Grollens in der arabischen Welt seit Anfang 2011 werden sich m{\"o}glicherweise als weniger hilfreich f{\"u}r die L{\"o}sung des Nahostkonflikts erweisen als erhofft. Zumindest auf kurze Sicht hat sich die Nachbarschaft Israels in einen noch unberechenbareren und instabileren Ort verwandelt. Israel w{\"u}rde die Entstehung guten und repr{\"a}sentativen Regierens in der arabischen Welt willkommen heißen. Doch sind die weiteren Entwicklungen in der Region kaum abzusch{\"a}tzen.}, language = {de} } @article{WeigelDobryakovKlaumuenzeretal.2011, author = {Weigel, A. and Dobryakov, A. and Klaum{\"u}nzer, Bastian and Sajadi, M. and Saalfrank, Peter and Ernsting, N. P.}, title = {Femtosecond stimulated raman spectroscopy of flavin after optical excitation}, series = {The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces \& biophysical chemistry}, volume = {115}, journal = {The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces \& biophysical chemistry}, number = {13}, publisher = {American Chemical Society}, address = {Washington}, issn = {1520-6106}, doi = {10.1021/jp1117129}, pages = {3656 -- 3680}, year = {2011}, abstract = {In blue-light photoreceptors using flavin (BLUF), the signaling state is formed already within several 100 ps after illumination, with only small changes of the absorption spectrum. The accompanying structural evolution can, in principle, be monitored by femtosecond stimulated Raman spectroscopy (FSRS). The method is used here to characterize the excited-state properties of riboflavin and flavin adenine dinucleotide in polar solvents. Raman modes are observed in the range 90-1800 cm(-1) for the electronic ground state S-0 and upon excitation to the S-1 state, and modes >1000 cm(-1) of both states are assigned with the help of quantum-chemical calculations. Line shapes are shown to depend sensitively on resonance conditions. They are affected by wavepacket motion in any of the participating electronic states, resulting in complex amplitude modulation of the stimulated Raman spectra. Wavepackets in S-1 can be marked, and thus isolated, by stimulated-emission pumping with the picosecond Raman pulses. Excited-state absorption spectra are obtained from a quantitative comparison of broadband transient fluorescence and absorption. In this way, the resonance conditions for FSRS are determined. Early differences of the emission spectrum depend on excess vibrational energy, and solvation is seen as dynamic Stokes shift of the emission band. The ne state is evidenced only through changes of emission oscillator strength during solvation. S-1 quenching by adenine is seen with all methods in terms of dynamics, not by spectral intermediates.}, language = {en} } @article{WeidlichPolyvyanyyMendlingetal.2011, author = {Weidlich, Matthias and Polyvyanyy, Artem and Mendling, Jan and Weske, Mathias}, title = {Causal behavioural profiles - efficient computation, applications, and evaluation}, series = {Fundamenta informaticae}, volume = {113}, journal = {Fundamenta informaticae}, number = {3-4}, publisher = {IOS Press}, address = {Amsterdam}, issn = {0169-2968}, doi = {10.3233/FI-2011-614}, pages = {399 -- 435}, year = {2011}, abstract = {Analysis of behavioural consistency is an important aspect of software engineering. In process and service management, consistency verification of behavioural models has manifold applications. For instance, a business process model used as system specification and a corresponding workflow model used as implementation have to be consistent. Another example would be the analysis to what degree a process log of executed business operations is consistent with the corresponding normative process model. Typically, existing notions of behaviour equivalence, such as bisimulation and trace equivalence, are applied as consistency notions. Still, these notions are exponential in computation and yield a Boolean result. In many cases, however, a quantification of behavioural deviation is needed along with concepts to isolate the source of deviation. In this article, we propose causal behavioural profiles as the basis for a consistency notion. These profiles capture essential behavioural information, such as order, exclusiveness, and causality between pairs of activities of a process model. Consistency based on these profiles is weaker than trace equivalence, but can be computed efficiently for a broad class of models. In this article, we introduce techniques for the computation of causal behavioural profiles using structural decomposition techniques for sound free-choice workflow systems if unstructured net fragments are acyclic or can be traced back to S-or T-nets. We also elaborate on the findings of applying our technique to three industry model collections.}, language = {en} } @article{WeidlichPolyvyanyyDesaietal.2011, author = {Weidlich, Matthias and Polyvyanyy, Artem and Desai, Nirmit and Mendling, Jan and Weske, Mathias}, title = {Process compliance analysis based on behavioural profiles}, series = {Information systems}, volume = {36}, journal = {Information systems}, number = {7}, publisher = {Elsevier}, address = {Oxford}, issn = {0306-4379}, doi = {10.1016/j.is.2011.04.002}, pages = {1009 -- 1025}, year = {2011}, abstract = {Process compliance measurement is getting increasing attention in companies due to stricter legal requirements and market pressure for operational excellence. In order to judge on compliance of the business processing, the degree of behavioural deviation of a case, i.e., an observed execution sequence, is quantified with respect to a process model (referred to as fitness, or recall). Recently, different compliance measures have been proposed. Still, nearly all of them are grounded on state-based techniques and the trace equivalence criterion, in particular. As a consequence, these approaches have to deal with the state explosion problem. In this paper, we argue that a behavioural abstraction may be leveraged to measure the compliance of a process log - a collection of cases. To this end, we utilise causal behavioural profiles that capture the behavioural characteristics of process models and cases, and can be computed efficiently. We propose different compliance measures based on these profiles, discuss the impact of noise in process logs on our measures, and show how diagnostic information on non-compliance is derived. As a validation, we report on findings of applying our approach in a case study with an international service provider.}, language = {en} } @article{WeidlichMendlingWeske2011, author = {Weidlich, Matthias and Mendling, Jan and Weske, Mathias}, title = {Efficient consistency measurement based on behavioral profiles of process models}, series = {IEEE transactions on software engineering}, volume = {37}, journal = {IEEE transactions on software engineering}, number = {3}, publisher = {Inst. of Electr. and Electronics Engineers}, address = {Los Alamitos}, issn = {0098-5589}, doi = {10.1109/TSE.2010.96}, pages = {410 -- 429}, year = {2011}, abstract = {Engineering of process-driven business applications can be supported by process modeling efforts in order to bridge the gap between business requirements and system specifications. However, diverging purposes of business process modeling initiatives have led to significant problems in aligning related models at different abstract levels and different perspectives. Checking the consistency of such corresponding models is a major challenge for process modeling theory and practice. In this paper, we take the inappropriateness of existing strict notions of behavioral equivalence as a starting point. Our contribution is a concept called behavioral profile that captures the essential behavioral constraints of a process model. We show that these profiles can be computed efficiently, i.e., in cubic time for sound free-choice Petri nets w.r.t. their number of places and transitions. We use behavioral profiles for the definition of a formal notion of consistency which is less sensitive to model projections than common criteria of behavioral equivalence and allows for quantifying deviation in a metric way. The derivation of behavioral profiles and the calculation of a degree of consistency have been implemented to demonstrate the applicability of our approach. We also report the findings from checking consistency between partially overlapping models of the SAP reference model.}, language = {en} } @phdthesis{Weidlich2011, author = {Weidlich, Matthias}, title = {Behavioural profiles : a relational approach to behaviour consistency}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-55590}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Business Process Management (BPM) emerged as a means to control, analyse, and optimise business operations. Conceptual models are of central importance for BPM. Most prominently, process models define the behaviour that is performed to achieve a business value. In essence, a process model is a mapping of properties of the original business process to the model, created for a purpose. Different modelling purposes, therefore, result in different models of a business process. Against this background, the misalignment of process models often observed in the field of BPM is no surprise. Even if the same business scenario is considered, models created for strategic decision making differ in content significantly from models created for process automation. Despite their differences, process models that refer to the same business process should be consistent, i.e., free of contradictions. Apparently, there is a trade-off between strictness of a notion of consistency and appropriateness of process models serving different purposes. Existing work on consistency analysis builds upon behaviour equivalences and hierarchical refinements between process models. Hence, these approaches are computationally hard and do not offer the flexibility to gradually relax consistency requirements towards a certain setting. This thesis presents a framework for the analysis of behaviour consistency that takes a fundamentally different approach. As a first step, an alignment between corresponding elements of related process models is constructed. Then, this thesis conducts behavioural analysis grounded on a relational abstraction of the behaviour of a process model, its behavioural profile. Different variants of these profiles are proposed, along with efficient computation techniques for a broad class of process models. Using behavioural profiles, consistency of an alignment between process models is judged by different notions and measures. The consistency measures are also adjusted to assess conformance of process logs that capture the observed execution of a process. Further, this thesis proposes various complementary techniques to support consistency management. It elaborates on how to implement consistent change propagation between process models, addresses the exploration of behavioural commonalities and differences, and proposes a model synthesis for behavioural profiles.}, language = {en} } @article{Weidemann2011, author = {Weidemann, Diethelm}, title = {Der Afghanistan-Komplex}, series = {WeltTrends-Papiere}, journal = {WeltTrends-Papiere}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1864-0656}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63225}, pages = {11 -- 21}, year = {2011}, abstract = {Inhalt: Historische Herausbildung des Konfliktes ; Das Scheitern der Reformen Amanullah Khans ; Der Modus Vivendi Zahir Shahs ; Der Afghanistankrieg von 1979 bis 1989 ; Der B{\"u}rgerkrieg 1989 bis 2001 ; Einzug der Taliban ; Aktuelle Lage in Afghanistan ; Intervention der USA und Folgen ; Ungewisse Perspektiven}, language = {de} } @article{Wehinger2011, author = {Wehinger, Brunhilde}, title = {Der Salon : ein Modell kultureller Begegnungsr{\"a}ume weiblicher Pr{\"a}gung}, isbn = {978-3-89971-877-5}, year = {2011}, language = {de} } @article{Wehinger2011, author = {Wehinger, Brunhilde}, title = {Alles will jetzt lesen : Formen der Geselligkeit in {\"o}ffentlichen Bibliotheken und Lesekabinetten im Zeichen der Aufkl{\"a}rung}, isbn = {978-3-8376-1404-6}, year = {2011}, language = {de} } @article{WeberTierschUnterlassetal.2011, author = {Weber, Nancy and Tiersch, Brigitte and Unterlass, Miriam M. and Heilig, Anneliese and Tauer, Klaus}, title = {"Schizomorphic" Emulsion Copolymerization Particles}, series = {Macromolecular rapid communications}, volume = {32}, journal = {Macromolecular rapid communications}, number = {23}, publisher = {Wiley-Blackwell}, address = {Malden}, issn = {1022-1336}, doi = {10.1002/marc.201100491}, pages = {1925 -- 1929}, year = {2011}, abstract = {Cryo-electron microscopy, atomic force microscopy, and light microscopy investigations provide experimental evidence that amphiphilic emulsion copolymerization particles change their morphology in dependence on concentration. The shape of the particles is spherical at solids content above 1\%, but it changes to rod-like, ring-like, and web-like structures at lower concentrations. In addition, the shape and morphology of these particles at low concentrations are not fixed but very flexible and vary with time between spheres, flexible pearlnecklace structures, and stretched rods.}, language = {en} } @phdthesis{Weber2011, author = {Weber, Nancy}, title = {Die Synthese "schizomorpher" Copolymer - Latexteilchen}, address = {Potsdam}, pages = {119 S.}, year = {2011}, language = {de} } @article{WeberCardonaValenciaetal.2011, author = {Weber, Marion and Cardona, A. and Valencia, V. and Altenberger, Uwe and Lopez-Martinez, M. and Tobon, M. and Zapata, Sebastian Henao and Zapata, G. and Concha, A. E.}, title = {Geochemistry and geochronology of the Guajira Eclogites, northern Colombia evidence of a metamorphosed primitive Cretaceous Caribbean Island-arc}, series = {Geologica acta}, volume = {9}, journal = {Geologica acta}, number = {3-4}, publisher = {Facultat de Geologia, Divisio III, Ci{\`e}ncies Experimentals i Matem{\`a}tiques, Universitat de Barcelona}, address = {Barcelona}, issn = {1695-6133}, doi = {10.1344/105.000001740}, pages = {425 -- 443}, year = {2011}, abstract = {The chemical composition of eclogites, found as boulders in a Tertiary conglomerate from the Guajira Peninsula, Colombia suggests that these rocks are mainly metamorphosed basaltic andesites. They are depleted in LILE elements compared to MORB, have a negative Nb-anomaly and flat to enriched REE patterns, suggesting that their protoliths evolved in a subduction related tectonic setting. They show island-arc affinities and are similar to primitive island-arc rocks described in the Caribbean. The geochemical characteristics are comparable to low-grade greenschists from the nearby Etpana Terrane, which are interpreted as part of a Cretaceous intra-oceanic arc. These data support evidence that the eclogites and the Etpana terrane rocks formed from the same volcano-sedimentary sequence. Part of this sequence was accreted onto the margin and another was incorporated into the subduction channel and metamorphosed at eclogite facies conditions. Ar-40-Ar-39 ages of 79.2 +/- 1.1Ma and 82.2 +/- 2.5Ma determined on white micas, separated from two eclogite samples, are interpreted to be related to the cooling of the main metamorphic event. The formation of a common volcano-sedimentary protolith and subsequent metamorphism of these units record the ongoing Late Cretaceous continental subduction of the South American margin within the Caribbean intra-oceanic arc subduction zone. This gave way to an arc-continent collision between the Caribbean and the South American plates, where this sequence was exhumed after the Campanian.}, language = {en} } @article{Weber2011, author = {Weber, Ewald}, title = {Strong regeneration ability from rhizome fragments in two invasive clonal plants (Solidago canadensis and S. gigantea)}, series = {Biological invasions : unique international journal uniting scientists in the broad field of biological invasions}, volume = {13}, journal = {Biological invasions : unique international journal uniting scientists in the broad field of biological invasions}, number = {12}, publisher = {Springer}, address = {Dordrecht}, issn = {1387-3547}, doi = {10.1007/s10530-011-9977-y}, pages = {2947 -- 2955}, year = {2011}, abstract = {The two rhizomatous perennials Solidago canadensis and S. gigantea belong to the most widespread alien plants in Europe. Anecdotal observations suggest that they disperse also by rhizome fragments. For testing their resprouting ability, rhizome fragments of different sizes from both species were buried at four different soil depths (0, 5, 10 and 20 cm, respectively) in a common garden. Rhizome fragments of S. canadensis ranged 3-6 cm in length, those of S. gigantea 5-20 cm in length. Resprouting plants were harvested after 3 months and growth related traits measured to assess their vitality. Resprouting rate in S. gigantea was far higher than in S. canadensis (85 and 19\%, respectively). In S. gigantea, fragments of all sizes resprouted from all soil depths whereas none rhizome of S. canadensis emerged from 20 cm burial depth. In S. gigantea, size related traits showed significant interactions between fragment size and burial depth, but not relative shoot growth rate. At all burial depths, vitality of plants emerging from small rhizomes was lower than plants emerging from large rhizomes. Effects of rhizome size became stronger with increasing burial depth. The results show that both species are able to resprout from buried rhizome fragments, and that succesful regeneration is more likely to occur in S. gigantea. Managing these species should avoid any activities promoting rhizome fragmentation and dispersal of fragments.}, language = {en} } @article{WatermeyerHoehleKauschke2011, author = {Watermeyer, Melanie and H{\"o}hle, Barbara and Kauschke, Christina}, title = {Ausagieren von S{\"a}tzen versus Satz-Bild-Zuordnung}, series = {Spektrum Patholinguistik}, journal = {Spektrum Patholinguistik}, number = {4}, issn = {1869-3822}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54374}, pages = {237 -- 246}, year = {2011}, language = {de} } @article{WatermeyerHoehleKauschke2011, author = {Watermeyer, Melanie and H{\"o}hle, Barbara and Kauschke, Christina}, title = {Ausagieren von S{\"a}tzen versus Satz-Bild-Zuordnung: Vergleich zweier Methoden zur Untersuchung des Sprachverst{\"a}ndnisses anhand von semantisch reversiblen S{\"a}tzen mit Objektvoranstellung bei drei- und f{\"u}nfj{\"a}hrigen Kindern}, year = {2011}, language = {de} } @article{WasiolkaBlaum2011, author = {Wasiolka, Bernd and Blaum, Niels}, title = {Comparing biodiversity between protected savanna and adjacent non-protected farmland in the southern Kalahari}, series = {Journal of arid environments}, volume = {75}, journal = {Journal of arid environments}, number = {9}, publisher = {Elsevier}, address = {London}, issn = {0140-1963}, doi = {10.1016/j.jaridenv.2011.04.011}, pages = {836 -- 841}, year = {2011}, abstract = {In this study we investigated the effect of different land use options (wildlife versus livestock) on species richness of plants and reptiles in the protected Kgalagadi Transfrontier Park (KTP) versus adjacent non-protected farmland within the same savanna habitat type (Aoub dune veld) in the southern Kalahari, South Africa. Our results show that both plant and reptile species richness as well as plant cover and reptile abundance was significantly higher in the protected KTP than in the non-protected farmland. The higher proportion of shrub but lower proportions of perennial grass cover, herb cover, and herb species richness in the farmland can be explained by higher stocking rates and the differences in feeding behaviour between native wild ungulates (e.g. Antidorcas marsupialis, Oryx gazella) and livestock (mainly sheep). The reptile's prey availability and microhabitats (perennial grass tussocks and rodent burrows) for thermoregulation and protection against predators were significantly lower in the farmland. To conclude, our results clearly show that long term effects of different land use options (wildlife in protected KTP versus extensive livestock production in the non-protected farmland) even within the same habitat type have led to significant changes in vegetation composition, availability of microhabitat structures and in the reptile community.}, language = {en} } @unpublished{WarschburgerLehmkuhl2011, author = {Warschburger, Petra and Lehmkuhl, Ulrike}, title = {Disturbed eating behavior and its consequences}, series = {Praxis der Kinderpsychologie und Kinderpsychiatrie : Ergebnisse aus Psychotherapie, Beratung und Psychiatrie}, volume = {60}, journal = {Praxis der Kinderpsychologie und Kinderpsychiatrie : Ergebnisse aus Psychotherapie, Beratung und Psychiatrie}, number = {4}, publisher = {Vandenhoeck \& Ruprecht}, address = {G{\"o}ttingen}, issn = {0032-7034}, pages = {249 -- 252}, year = {2011}, language = {de} } @misc{Wapler2011, author = {Wapler, Philipp Sebastian}, title = {Die Effizienz in der EU-Fussionskontrolle : eine Untersuchung {\"u}ber die Bedeutung von Effizienzgewinnen in der Fusionskontrolle der EU nach Art. 2 FKVO 139/2004}, series = {Europ{\"a}ische Hochschulschriften}, volume = {5225}, journal = {Europ{\"a}ische Hochschulschriften}, publisher = {Lang}, address = {Frankfurt am Main}, isbn = {978-3-631-60795-4}, issn = {0531-7312}, pages = {256 S.}, year = {2011}, language = {de} } @article{WangHerzschuh2011, author = {Wang, Yongbo and Herzschuh, Ulrike}, title = {Reassessment of Holocene vegetation change on the upper Tibetan Plateau using the pollen-based REVEALS model}, series = {Review of palaeobotany and palynology : an international journal}, volume = {168}, journal = {Review of palaeobotany and palynology : an international journal}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0034-6667}, doi = {10.1016/j.revpalbo.2011.09.004}, pages = {31 -- 40}, year = {2011}, abstract = {Previous studies based on fossil pollen data have reported significant changes in vegetation on the alpine Tibetan Plateau during the Holocene. However, since the relative proportions of fossil pollen taxa are largely influenced by individual pollen productivities and the dispersal characteristics, such inferences on vegetation have the potential to be considerably biased. We therefore examined the modern pollen-vegetation relationships for four common pollen species on the Tibetan Plateau, using Extended R-value (ERV) models. Assuming an average radius of 100 m for the sampled lakes, we estimated the relevant source area of pollen (RSAP) to be 2200 m (which represents the distance from the lake). Using Poaceae as the reference taxa (Pollen Productivity Estimate, PPE = 1), ERV Submodel 2 derived relative high PPEs for the steppe and desert taxa: 2.079 +/- 0.432 for Artemisia and 5.379 +/- 1.077 for Chenopodiaceae. Low PPEs were estimated for the Cyperaceae (1.036 +/- 0.012). whose plants are characteristic of the alpine Kobresia meadows. Applying these PPEs to four fossil pollen sequences since the Late Glacial, the plant abundances on the central and north-eastern Tibetan Plateau were quantified using the "Regional Estimates of Vegetation Abundance from Large Sites" (REVEALS) model. The proportions of Artemisia and Chenopodiaceae were greatly reduced compared to their original pollen percentages in the reconstructed vegetation, owing to their high productivities and their dispersal characteristics, while Cyperaceae showed a relative increase in the vegetation reconstruction. The reconstructed vegetation assemblages of the four pollen sequence sites always yielded smaller compositional species turnovers than suggested by the pollen spectra, as revealed by Detrended Canonical Correspondence Analyses (DCCA) of the Holocene sections. The strength of the previously reported vegetation changes may therefore have been overestimated, which indicates the importance of taking into account pollen-vegetation relationships when discussing the potential drivers (such as climate, land use, atmospheric CO(2) concentrations) and implications (such as for land surface-climate feedbacks, carbon storage, and biodiversity) of vegetation change.}, language = {en} } @phdthesis{Wang2011, author = {Wang, Yongbo}, title = {Late glacial to Holocene climate and vegetation changes on the Tibetan Plateau inferred from fossil pollen records in lacustrine sediments}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63155}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The past climate in central Asia, and especially on the Tibetan Plateau (TP), is of great importance for an understanding of global climate processes and for predicting the future climate. As a major influence on the climate in this region, the Asian Summer Monsoon (ASM) and its evolutionary history are of vital importance for accurate predictions. However, neither the evolutionary pattern of the summer monsoon nor the driving mechanisms behind it are yet clearly understood. For this research, I first synthesized previously published Late Glacial to Holocene climatic records from monsoonal central Asia in order to extract the general climate signals and the associated summer monsoon intensities. New climate and vegetation sequences were then established using improved quantitative methods, focusing on fossil pollen records recovered from Tibetan lakes and also incorporating new modern datasets. The pollen-vegetation and vegetation-climate relationships on the TP were also evaluated in order to achieve a better understanding of fossil pollen records. The synthesis of previously published moisture-related palaeoclimate records in monsoonal central Asia revealed generally different temporal patterns for the two monsoonal subsystems, i.e. the Indian Summer Monsoon (ISM) and East Asian Summer Monsoon (EASM). The ISM appears to have experienced maximum wet conditions during the early Holocene, while many records from the area affected by the EASM indicate relatively dry conditions at that time, particularly in north-central China where the maximum moisture levels occurred during the middle Holocene. A detailed consideration of possible driving factors affecting the summer monsoon, including summer solar insolation and sea surface temperatures, revealed that the ISM was primarily driven by variations in northern hemisphere solar insolation, and that the EASM may have been constrained by the ISM resulting in asynchronous patterns of evolution for these two subsystems. This hypothesis is further supported by modern monsoon indices estimated using the NCEP/NCAR Reanalysis data from the last 50 years, which indicate a significant negative correlation between the two summer monsoon subsystems. By analogy with the early Holocene, intensification of the ISM during coming decades could lead to increased aridification elsewhere as a result of the asynchronous nature of the monsoon subsystems, as can already be observed in the meteorological data from the last 15 years. A quantitative climate reconstruction using fossil pollen records was achieved through analysis of sediment core recovered from Lake Donggi Cona (in the north-eastern part of the TP) which has been dated back to the Last Glacial Maximum (LGM). A new data-set of modern pollen collected from large lakes in arid to semi-arid regions of central Asia is also presented herein. The concept of "pollen source area" was introduced to modern climate calibration based on pollen from large lakes, and was applied to the fossil pollen sequence from Lake Donggi Cona. Extremely dry conditions were found to have dominated the LGM, and a subsequent gradually increasing trend in moisture during the Late Glacial period was terminated by an abrupt reversion to a dry phase that lasted for about 1000 years and coincided with the first Heinrich Event of the northern Atlantic region. Subsequent periods corresponding to the warm B{\o}lling-Aller{\o}d period and the Younger Dryas cold event were followed by moist conditions during the early Holocene, with annual precipitation of up to about 400 mm. A slightly drier trend after 9 cal ka BP was then followed by a second wet phase during the middle Holocene that lasted until 4.5 cal ka BP. Relatively steady conditions with only slight fluctuations then dominated the late Holocene, resulting in the present climatic conditions. In order to investigate the relationship between vegetation and climate, temporal variations in the possible driving factors for vegetation change on the northern TP were examined using a high resolution late Holocene pollen record from Lake Kusai. Moving-window Redundancy Analyses (RDAs) were used to evaluate the correlations between pollen assemblages and individual sedimentary proxies. These analyses have revealed frequent fluctuations in the relative abundances of alpine steppe and alpine desert components, and in particular a decrease in the total vegetation cover at around 1500 cal a BP. The climate was found to have had an important influence on vegetation changes when conditions were relatively wet and stable. However, after the 1500 cal a BP threshold in vegetation cover was crossed the vegetation appears to have been affected more by extreme events such as dust storms or fluvial erosion than by the general climatic trends. In addition, pollen spectra over the last 600 years have been revealed by Procrustes analysis to be significantly different from those recovered from older samples, which is attributed to an increased human impact that resulted in unprecedented changes to the composition of the vegetation. Theoretical models that have been developed and widely applied to the European area (i.e. the Extended R-Value (ERV) model and the Regional Estimates of Vegetation Abundance from Large Sites (REVEALS) model) have been applied to the high alpine TP ecosystems in order to investigate the pollen-vegetation relationships, as well as for quantitative reconstructions of vegetation abundance. The modern pollen-vegetation relationships for four common pollen species on the TP have been investigated using Poaceae as the reference taxa. The ERV Submodel 2 yielded relatively high PPEs for the steppe and desert taxa (Artemisia Chenopodiaceae), and low PPEs for the Cyperaceae that are characteristic of the alpine Kobresia meadows. The plant abundances on the central and north-eastern TP were quantified by applying these PPEs to four post-Late Glacial fossil pollen sequences. The reconstructed vegetation assemblages for the four pollen sequences always yielded smaller compositional species turnovers than suggested by the pollen spectra, indicating that the strength of the previously-reported vegetation changes may therefore have been overestimated. In summary, the key findings of this thesis are that (a) the two ASM subsystems show asynchronous patterns during both the Holocene and modern time periods, (b) fossil pollen records from large lakes reflect regional signals for which the pollen source areas need to be taken into account, (c) climate is not always the main driver for vegetation change, and (d) previously reported vegetation changes on the TP may have been overestimated because they ignored inter-species variations in pollen productivity.}, language = {en} } @phdthesis{Wang2011, author = {Wang, Long}, title = {X-tracking the usage interest on web sites}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-51077}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The exponential expanding of the numbers of web sites and Internet users makes WWW the most important global information resource. From information publishing and electronic commerce to entertainment and social networking, the Web allows an inexpensive and efficient access to the services provided by individuals and institutions. The basic units for distributing these services are the web sites scattered throughout the world. However, the extreme fragility of web services and content, the high competence between similar services supplied by different sites, and the wide geographic distributions of the web users drive the urgent requirement from the web managers to track and understand the usage interest of their web customers. This thesis, "X-tracking the Usage Interest on Web Sites", aims to fulfill this requirement. "X" stands two meanings: one is that the usage interest differs from various web sites, and the other is that usage interest is depicted from multi aspects: internal and external, structural and conceptual, objective and subjective. "Tracking" shows that our concentration is on locating and measuring the differences and changes among usage patterns. This thesis presents the methodologies on discovering usage interest on three kinds of web sites: the public information portal site, e-learning site that provides kinds of streaming lectures and social site that supplies the public discussions on IT issues. On different sites, we concentrate on different issues related with mining usage interest. The educational information portal sites were the first implementation scenarios on discovering usage patterns and optimizing the organization of web services. In such cases, the usage patterns are modeled as frequent page sets, navigation paths, navigation structures or graphs. However, a necessary requirement is to rebuild the individual behaviors from usage history. We give a systematic study on how to rebuild individual behaviors. Besides, this thesis shows a new strategy on building content clusters based on pair browsing retrieved from usage logs. The difference between such clusters and the original web structure displays the distance between the destinations from usage side and the expectations from design side. Moreover, we study the problem on tracking the changes of usage patterns in their life cycles. The changes are described from internal side integrating conceptual and structure features, and from external side for the physical features; and described from local side measuring the difference between two time spans, and global side showing the change tendency along the life cycle. A platform, Web-Cares, is developed to discover the usage interest, to measure the difference between usage interest and site expectation and to track the changes of usage patterns. E-learning site provides the teaching materials such as slides, recorded lecture videos and exercise sheets. We focus on discovering the learning interest on streaming lectures, such as real medias, mp4 and flash clips. Compared to the information portal site, the usage on streaming lectures encapsulates the variables such as viewing time and actions during learning processes. The learning interest is discovered in the form of answering 6 questions, which covers finding the relations between pieces of lectures and the preference among different forms of lectures. We prefer on detecting the changes of learning interest on the same course from different semesters. The differences on the content and structure between two courses leverage the changes on the learning interest. We give an algorithm on measuring the difference on learning interest integrated with similarity comparison between courses. A search engine, TASK-Moniminer, is created to help the teacher query the learning interest on their streaming lectures on tele-TASK site. Social site acts as an online community attracting web users to discuss the common topics and share their interesting information. Compared to the public information portal site and e-learning web site, the rich interactions among users and web content bring the wider range of content quality, on the other hand, provide more possibilities to express and model usage interest. We propose a framework on finding and recommending high reputation articles in a social site. We observed that the reputation is classified into global and local categories; the quality of the articles having high reputation is related with the content features. Based on these observations, our framework is implemented firstly by finding the articles having global or local reputation, and secondly clustering articles based on their content relations, and then the articles are selected and recommended from each cluster based on their reputation ranks.}, language = {en} } @article{WandHolzloehnerNeupertetal.2011, author = {Wand, Inga and Holzl{\"o}hner, Pamela and Neupert, Steffi and Micheel, Burkhard and Heilmann, Katja}, title = {Cooperation of dendritic cells with naive lymphocyte populations to induce the generation of antigen-specific antibodies in vitro}, series = {Journal of biotechnology}, volume = {156}, journal = {Journal of biotechnology}, number = {3}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0168-1656}, doi = {10.1016/j.jbiotec.2011.09.002}, pages = {173 -- 181}, year = {2011}, abstract = {The production of monoclonal antibodies by hybridoma technology is dependent on lymphocytes taken from vertebrates which have to be immunized against the corresponding antigen. We present here our first experiments which should allow the replacement of this in vivo immunization step by an in vitro immunization procedure. This work provides new possibilities for the specific activation of immune cells in order to use them for the generation of antibodies which are not of murine origin. Bone marrow-derived dendritic cells were loaded with antigen and co-cultured with naive T and B lymphocytes of non-immunized mice. The interaction and activation of the different cell types were investigated by measuring the expression of specific cell surface markers, the release of activation-dependent interleukins and the secretion of antigen-specific antibodies. We could demonstrate that dendritic cells process and present antigen fragments and activate T cells, that T cells proliferate and release activation-induced interleukins, and that B cells maturate under the influence of activated T cells and secrete antigen-specific antibodies.}, language = {en} } @unpublished{WalzAdrianGilbertetal.2011, author = {Walz, Norbert and Adrian, Rita and Gilbert, John J. and Monaghan, Michael T. and Weithoff, Guntram and Zimmermann-Timm, Heike}, title = {Preface}, series = {Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica}, volume = {662}, journal = {Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica}, number = {1}, publisher = {Springer}, address = {Dordrecht}, issn = {0018-8158}, doi = {10.1007/s10750-010-0514-2}, pages = {1 -- 4}, year = {2011}, language = {en} } @article{WagnerAntunesRistowetal.2011, author = {Wagner, Viktoria and Antunes, Pedro M. and Ristow, Michael and Lechner, Ute and Hensen, Isabell}, title = {Prevailing negative soil biota effect and no evidence for local adaptation in a widespread eurasian grass}, series = {PLoS one}, volume = {6}, journal = {PLoS one}, number = {3}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0017580}, pages = {8}, year = {2011}, abstract = {Background: Soil biota effects are increasingly accepted as an important driver of the abundance and distribution of plants. While biogeographical studies on alien invasive plant species have indicated coevolution with soil biota in their native distribution range, it is unknown whether adaptation to soil biota varies among populations within the native distribution range. The question of local adaptation between plants and their soil biota has important implications for conservation of biodiversity and may justify the use of seed material from local provenances in restoration campaigns. Methodology/Principal Findings: We studied soil biota effects in ten populations of the steppe grass Stipa capillata from two distinct regions, Europe and Asia. We tested for local adaptation at two different scales, both within (ca. 10-80 km) and between (ca. 3300 km) regions, using a reciprocal inoculation experiment in the greenhouse for nine months. Generally, negative soil biota effects were consistent. However, we did not find evidence for local adaptation: both within and between regions, growth of plants in their 'home soil' was not significantly larger relative to that in soil from other, more distant, populations. Conclusions/Significance: Our study suggests that negative soil biota effects can prevail in different parts of a plant species' range. Absence of local adaptation points to the possibility of similar rhizosphere biota composition across populations and regions, sufficient gene flow to prevent coevolution, selection in favor of plasticity, or functional redundancy among different soil biota. From the point of view of plant - soil biota interactions, our findings indicate that the current practice of using seeds exclusively from local provenances in ecosystem restoration campaigns may not be justified.}, language = {en} } @misc{WagnerPywellKnoppetal.2011, author = {Wagner, Markus and Pywell, Richard F. and Knopp, Tatjana and Bullock, James M. and Heard, Matthew S.}, title = {The germination niches of grassland species targeted for restoration}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, number = {675}, issn = {1866-8372}, doi = {10.25932/publishup-41343}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-413438}, pages = {117 -- 131}, year = {2011}, abstract = {Restoration of semi-natural grassland communities involves a combination of (1) sward disturbance to create a temporal window for establishment, and (2) target species introduction, the latter usually by seed sowing. With great regularity, particular species establish only poorly. More reliable establishment could improve outcome of restoration projects and increase cost-effectiveness. We investigated the abiotic germination niche of ten poorly establishing calcareous grassland species by simultaneously exploring the effects of moisture and light availability and temperature fluctuation on percentage germina- tion and speed of germination. We also investigated the effects of three different pre-treatments used to enhance seed germination - cold-stratification, osmo- tic priming and priming in combination with gibberellic acid (GA 3 ) - and how these affected abiotic germination niches. Species varied markedly in width of abiotic germination niche, ranging from Carex flacca with very strict abiotic requirements, to several species reliably germinating across the whole range of abiotic conditions. Our results suggest pronounced differ- ences between species in gap requirements for establishment. Germination was improved in most species by at least one pre-treatment. Evidence for positive effects of adding GA 3 to seed priming solutions was limited. In several species, pre-treated seeds germinated under a wider range of abiotic conditions than untreated seeds. Improved knowledge of species-specific germination niches and the effects of seed pre-treatments may help to improve species establishment by sowing, and to identify species for which sowing at a later stage of restoration or introduction as small plants may represent a more viable strategy.}, language = {en} } @article{Wagner2011, author = {Wagner, Birgitt}, title = {J{\"u}dische Gesellschaft im Mittelpunkt}, series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, journal = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, number = {17}, issn = {1614-6492}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53246}, pages = {53 -- 70}, year = {2011}, abstract = {Dieser Text geht der Frage nach, wie die wissenschaftliche Auseinandersetzung mit den nationalsozialistischen Ghettos in der Zeit von 1945 bis 1960 im englischen Sprachraum betrieben wurde. Werke, die j{\"u}disches Erleben und Handeln mitsamt der gesellschaftlichen Organisation in den Mittelpunkt r{\"u}cken, sind in diesem Zeitraum deutlich st{\"a}rker vertreten, als dies nach einer Lekt{\"u}re der Sekund{\"a}rliteratur zu erwarten w{\"a}re. Ein wissenschaftlicher Ansatz, der die Juden nicht nur als namenlose Masse von Opfern wahrnimmt, tritt also durchaus schon fr{\"u}h auf. Ebenso wird die Politik der j{\"u}dischen F{\"u}hrungsschichten, der so genannten ‚Judenr{\"a}te', deutlich differenzierter verhandelt als vermutet; neben vernichtenden Urteilen finden sich Kontextualisierungen, die ihr Agieren aus verschiedenen Blickwinkeln beleuchten und einordnen. Auch wenn diese Forschungsanliegen zun{\"a}chst nur bedingt rezipiert wurden und vor allem universit{\"a}r marginal blieben, lassen sich doch von dieser Seite Traditionslinien besonders in die entstehende israelische Holocaustforschung beobachten.}, language = {de} } @phdthesis{Voelker2011, author = {V{\"o}lker, Jan}, title = {{\"A}sthetik der Lebendigkeit : Kants dritte Kritik}, publisher = {Fink}, address = {Paderborn}, isbn = {978-3-7705-5161-3}, pages = {274 S.}, year = {2011}, language = {de} } @phdthesis{Vapenka2011, author = {V{\´a}penka, Aleš}, title = {Geschlechterstereotype und Geschlechtsidentit{\"a}t von M{\"a}nnern mit unterschiedlichem Verlauf der psychosexuellen Entwicklung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53175}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Im Rahmen eines explorativen Vergleichsuntersuchungsplans wurde untersucht, inwieweit sich die durch biologische Faktoren bedingte unterschiedliche Lebenserfahrung sowie die Sozialisationsbedingungen in der psychosexuellen Entwicklung bei hetero-, homo- und postoperativen transsexuellen M{\"a}nnern (N = 191) auf die Integration der Geschlechterstereotypen in die kognitiven (Selbst-, Fremdwahrnehmung), emotionalen (Selbst- und Fremdbewertung) und verhaltensm{\"a}ßigen Aspekte (Normen der geschlechtsspezifischen Verhaltens) der Geschlechtsidentit{\"a}t auswirken und ob sich Identifikationsmuster der Entwicklung des geschlechtlichen Selbstkonzepts ableiten lassen. Die Messung der kognitiven Aspekte des geschlechtlichen Selbstkonzepts (Maskulinit{\"a}t und Femininit{\"a}t) erfolgte mittels der GERO-Skala von Brengelmann und Hendrich (1990). Zur Erfassung der emotionalen Aspekte und Identifikationsmuster der Entwicklung des geschlechtlichen Selbstkonzepts wurden die Werte f{\"u}r die Variablen Maskulinit{\"a}t und Femininit{\"a}t zuerst mittels der computergesteuerten Methodik IDEXMONO und IDEXIDIO, die auf der Identit{\"a}tsstrukturanalyse (Identity Structure Analysis) von Weinreich (2003) basiert, aufgearbeitet und weiter interferenzstatistisch ausgewertet. Weiterhin wurden der Fragebogen zur Messung normativer Geschlechtsrollenorientierung (NGRO) von Athenstaedt (2000) sowie ein ad hoc entworfener demographischer Fragebogen eingesetzt. Die Ergebnisse zeigen, dass der Verlauf der psychosexuellen Entwicklung einen starken Einfluss auf die Integration der Geschlechterstereotypen in die geschlechtliche Selbst- und Fremdwahrnehmung hat. Im kognitiven Bereich, bezogen auf die pers{\"o}nliche Identit{\"a}t (Grad der Selbstzuschreibung m{\"a}nnlicher und weiblicher Merkmale), stellt die Maskulinit{\"a}t eine stabile und erstrebenswerte Variable zur Herausbildung des geschlechtlichen Selbstkonzepts bei allen Gruppen dar. Die Femininit{\"a}t tr{\"a}gt am meisten zur Differenzierung zwischen den Hetero-, Homo- und Transsexuellen bei. Sie wird, je nach der Entwicklungsphase, unterschiedlich in das geschlechtliche Selbstkonzept integriert. Hinsichtlich der sozialen Identit{\"a}t (Zugeh{\"o}rigkeitsgef{\"u}hl) lassen sich die Gruppen bez{\"u}glich der wahrgenommenen {\"A}hnlichkeiten sowohl mit m{\"a}nnlichen als auch weiblichen Personen, je nach der Entwicklungsphase, unterscheiden. Die soziale Wahrnehmung von M{\"a}nnern und Frauen (Fremdwahrnehmung), ist bei Transsexuellen traditioneller als die der Hetero- und Homosexuellen. Bei der Selbst- und Fremdbewertung ergaben sich keine signifikanten Unterschiede. Bei der Internalisierung der sozialen Normen des geschlechtsspezifischen Verhaltens zeigt sich, dass Heterosexuelle der Aus{\"u}bung der Geschlechterrollen gegen{\"u}ber egalit{\"a}rer eingestellt sind als Trans- und Homosexuelle. Bei den Sozialisationsfaktoren ist hervorzuheben, dass generell weibliche Identifikationspersonen einen st{\"a}rkeren Einfluss auf die Herausbildung des geschlechtlichen Selbstkonzeptes hatten als m{\"a}nnliche Identifikationspersonen. Es scheint jedoch, dass Homosexuelle bei der Entwicklung ihres geschlechtlichen Selbstkonzepts st{\"a}rker unter dem Einfluss der Frauen stehen als die anderen zwei erforschten Gruppen. Zur Beantwortung der Frage, welche selbstkonzeptbezogenen Variablen und Entwicklungsfaktoren die gr{\"o}ßte statistische Bedeutung f{\"u}r die Trennung und Pr{\"a}diktion der einzelnen untersuchten Gruppen haben, wurde eine Diskriminanzanalyse berechnet. Die gr{\"o}ßte diskriminatorische Bedeutung besitzen die Variablen „Stereotypische Wahrnehmung der m{\"a}nnlichen Personen" und „Ego-Involvement mit weiblichen Personen" f{\"u}r die Diskriminanzfunktion 1 (Trennung der Transsexuellen von Hetero- und Homosexuellen) und die Variablen „Empathische Identifikation mit m{\"a}nnlichen Personen in der Vergangenheit" und „Zuwachs an empathischer Identifikation mit weiblichen Personen" f{\"u}r die Diskriminanzfunktion 2 (Trennung der Hetero- von Homosexuellen).}, language = {de} } @inproceedings{VukicevicSchreiberBeuermann2011, author = {Vukicevic, Radovan and Schreiber, Ulrike and Beuermann, Sabine}, title = {Azide-terminated poly(vinylidene fluoride) as building block for nanocomposite materials and block copolymers}, series = {Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS}, volume = {242}, booktitle = {Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS}, number = {16}, publisher = {American Chemical Society}, address = {Washington}, issn = {0065-7727}, pages = {1}, year = {2011}, language = {en} } @article{VukicevicBeuermann2011, author = {Vukicevic, Radovan and Beuermann, Sabine}, title = {Fullerenes decorated with poly(vinylidene fluoride)}, series = {Macromolecules : a publication of the American Chemical Society}, volume = {44}, journal = {Macromolecules : a publication of the American Chemical Society}, number = {8}, publisher = {American Chemical Society}, address = {Washington}, issn = {0024-9297}, doi = {10.1021/ma102754c}, pages = {2597 -- 2603}, year = {2011}, abstract = {Fullerenes decorated with poly(vinylidene fluoride) (PVDF) were synthesized in a three-step procedure: Iodine transfer polymerization of vinylidene fluoride with C(6)F(12)I(2) as the chain transfer agent was carried out in supercritical carbon dioxide to synthesize iodine-terminated PVDF, which was subsequently transformed to azide-terminated polymer. Finally, azide-terminated PVDF chains were attached to a fullerene core under microwave irradiation at 160 degrees C in 1.5 h. The materials were characterized by NMR, FT-IR, UV/vis, GPC, elemental analysis, and DSC. On average, 4-5 PVDF chains are attached to one C(60) moiety. FT-IR spectra and DSC measurements indicate that the polymer end groups strongly affect the crystallinity of the material. For PVDF with azide end groups and PVDF attached to fullerenes the fraction of the beta polymorph is dominant while alpha polymorphs are almost absent.}, language = {en} } @phdthesis{Vukicevic2011, author = {Vukicevic, Radovan}, title = {Iodine- and azide-terminated poly(vinylidene fluoride) as a building block for the preparation of hybrid materials and block copolymers}, address = {Potsdam}, pages = {122 S.}, year = {2011}, language = {en} } @article{VossNimtzLeimkuehler2011, author = {Voss, Martin and Nimtz, Manfred and Leimk{\"u}hler, Silke}, title = {Elucidation of the dual role of Mycobacterial MoeZR in Molybdenum Cofactor Biosynthesis and Cysteine Biosynthesis}, series = {PLoS one}, volume = {6}, journal = {PLoS one}, number = {11}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0028170}, pages = {9}, year = {2011}, abstract = {The pathway of molybdenum cofactor biosynthesis has been studied in detail by using proteins from Mycobacterium species, which contain several homologs associated with the first steps of Moco biosynthesis. While all Mycobacteria species contain a MoeZR, only some strains have acquired an additional homolog, MoeBR, by horizontal gene transfer. The role of MoeBR and MoeZR was studied in detail for the interaction with the two MoaD-homologs involved in Moco biosynthesis, MoaD1 and MoaD2, in addition to the CysO protein involved in cysteine biosynthesis. We show that both proteins have a role in Moco biosynthesis, while only MoeZR, but not MoeBR, has an additional role in cysteine biosynthesis. MoeZR and MoeBR were able to complement an E. coli moeB mutant strain, but only in conjunction with the Mycobacterial MoaD1 or MoaD2 proteins. Both proteins were able to sulfurate MoaD1 and MoaD2 in vivo, while only MoeZR additionally transferred the sulfur to CysO. Our in vivo studies show that Mycobacteria have acquired several homologs to maintain Moco biosynthesis. MoeZR has a dual role in Moco- and cysteine biosynthesis and is involved in the sulfuration of MoaD and CysO, whereas MoeBR only has a role in Moco biosynthesis, which is not an essential function for Mycobacteria.}, language = {en} } @phdthesis{Vosloh2011, author = {Vosloh, Daniel}, title = {Subcellular compartmentation of primary carbon metabolism in mesophyll cells of Arabidopsis thaliana}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-55534}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Metabolismus in Pflanzenzellen ist stark kompartimentiert. Viele Stoffwechselwege haben Reaktionen in mehr als einem Kompartiment. Zum Beispiel wird w{\"a}hrend der Photosynthese in pflanzlichen Mesophyllzellen Kohlenstoff in Form von St{\"a}rke in den Chloroplasten synthetisiert, w{\"a}hrend es im Zytosol in Form von Sacharose gebildet und in der Vakuole gespeichert wird. Diese Reaktionen sind strikt reguliert um ein Gleichgewicht der Kohlenstoffpools der verschiedenen Kompartimente aufrecht zu erhalten und die Energieversorgung aller Teile der Zelle f{\"u}r anabolische Reaktionen sicher zu stellen. Ich wende eine Methode an, bei der die Zellen unter nicht-w{\"a}ssrigen Bedingungen fraktioniert werden und daher der metabolische Status der w{\"a}hrend der Ernte herrschte {\"u}ber den ganzen Zeitraum der Auftrennung beibehalten wird. Durch die Kombination von nichtw{\"a}ssriger Fraktionierung und verschiedener Massenspektrometrietechniken (Fl{\"u}ssigchromotagraphie- und Gaschromotagraphie basierende Massenspekrometrie) ist es m{\"o}glich die intrazellul{\"a}re Verteilung der meisten Intermediate des photosynthetischen Kohlenstoffstoffwechsels und der Produkte der nachgelagerten metabolischen Reaktionen zu bestimmen. Das Wissen {\"u}ber die in vivo Konzentrationen dieser Metabolite wurde genutzt um die {\"A}nderung der freien Gibbs Energie in vivo zu bestimmen. Mit Hilfe dessen kann bestimmt werden, welche Reaktion sich in einem Gleichgewichtszustand befinden und welche davon entfernt sind. Die Konzentration der Enzyme und der Km Werte wurden mit den Konzentrationen der Metabolite in vivo verglichen, um festzustellen, welche Enzyme substratlimitiert sind und somit sensitiv gegen{\"u}ber {\"A}nderungen der Substratkonzentration sind. Verschiedene Intermediate des Calvin-Benson Zyklus sind gleichzeitig Substrate f{\"u}r andere Stoffwechselwege, als da w{\"a}ren Dihyroxyaceton-phosphat (DHAP, Saccharosesynthese), Fructose 6-phosphat (Fru6P, St{\"a}rkesynthese), Erythrose 4-phosphat (E4P, Shikimat Stoffwechselweg) und Ribose 5-phosphat (R5P, Nukleotidbiosynthese). Die Enzyme, die diese Intermediate verstoffwechseln, liegen an den Abzweigungspunkten zu diesen Stoffwechselwegen. Diese sind Trisose phosphat isomerase (DHAP), Transketolase (E4P), Sedoheptulose-1,7 biphosphat aldolase (E4P) und Ribose-5-phosphat isomerase (R5P), welche nicht mit ihren Substraten ges{\"a}ttigt sind, da die jeweilige Substratkonzentration geringer als der zugeh{\"o}rige Km Wert ist. F{\"u}r metabolische Kontrolle bedeutet dies, dass diese Schritte am sensitivsten gegen{\"u}ber {\"A}nderungen der Substratkonzentrationen sind. Im Gegensatz dazu sind die regulierten irreversiblen Schritte von Fructose-1,6.biphosphatase und Sedoheptulose-1,7-biphosphatase relativ insensitiv gegen{\"u}ber {\"A}nderungen der Substratkonzentration. F{\"u}r den Stoffwechselweg der Saccharosesynthese konnte gezeigt werden, dass die zytosolische Aldolase eine geringer Bindeseitenkonzentration als Substratkonzentration (DHAP) aufweist, und dass die Konzentration von Saccharose-6-phosphat geringer als der Km Wert des synthetisierenden Enzyms Saccharose-phosphatase ist. Sowohl die Saccharose-phosphat-synthase, also auch die Saccharose-phosphatase sind in vivo weit von einem Gleichgewichtszustand entfernt. In Wildtyp Arabidopsis thaliana Columbia-0 Bl{\"a}ttern wurde der gesamte Pool von ADPGlc im Chloroplasten gefunden. Das Enzyme ADPGlc pyrophosphorylase ist im Chloroplasten lokalisiert und synthetisiert ADPGlc aus ATP und Glc1P. Dieses Verteilungsmuster spricht eindeutig gegen die Hypothese von Pozueta-Romero und Kollegen, dass ADPGlc im Zytosol durch ADP vermittelte Spaltung von Saccharose durch die Saccharose Synthase erzeugt wird. Basierend auf dieser Beobachtung und anderen ver{\"o}ffentlichten Ergebnissen wurde geschlußfolgert, dass der generell akzeptierte Stoffwechselweg der St{\"a}rkesynthese durch ADPGlc Produktion via ADPGlc pyrophosphorylase in den Chloroplasten korrekt ist, und die Hypothese des alternativen Stoffwechselweges unhaltbar ist. Innerhalb des Stoffwechselweges der Saccharosesynthsese wurde festgestellt, dass die Konzentration von ADPGlc geringer als der Km Wert des St{\"a}rkesynthase ist, was darauf hindeutet, dass das Enzym substratlimitiert ist. Eine generelle Beobachtung ist, dass viele Enzmye des Calvin-Benson Zyklus {\"a}hnliche Bindeseitenkonzentrationen wie Metabolitkonzentrationen aufweisen, wohingegen in den Synthesewegen von Saccharose und St{\"a}rke die Bindeseitenkonzentrationen der Enzyme viel geringer als die Metabolitkonzentrationen sind.}, language = {en} } @phdthesis{vonNicolai2011, author = {von Nicolai, Christina}, title = {The interplay of salt movements and regional tectonics at the passive continental margin of the South Atlantic, Kwanza Basin}, address = {Potsdam}, pages = {134 S.}, year = {2011}, language = {en} } @article{vonKleistMenzStockeretal.2011, author = {von Kleist, Max and Menz, Stephan and Stocker, Hartmut and Arasteh, Keikawus and Schuette, Christof and Huisinga, Wilhelm}, title = {HIV quasispecies dynamics during pro-active treatment switching impact on multi-drug resistance and resistance archiving in latent reservoirs}, series = {PLoS one}, volume = {6}, journal = {PLoS one}, number = {3}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0018204}, pages = {12}, year = {2011}, abstract = {The human immunodeficiency virus (HIV) can be suppressed by highly active anti-retroviral therapy (HAART) in the majority of infected patients. Nevertheless, treatment interruptions inevitably result in viral rebounds from persistent, latently infected cells, necessitating lifelong treatment. Virological failure due to resistance development is a frequent event and the major threat to treatment success. Currently, it is recommended to change treatment after the confirmation of virological failure. However, at the moment virological failure is detected, drug resistant mutants already replicate in great numbers. They infect numerous cells, many of which will turn into latently infected cells. This pool of cells represents an archive of resistance, which has the potential of limiting future treatment options. The objective of this study was to design a treatment strategy for treatment-naive patients that decreases the likelihood of early treatment failure and preserves future treatment options. We propose to apply a single, pro-active treatment switch, following a period of treatment with an induction regimen. The main goal of the induction regimen is to decrease the abundance of randomly generated mutants that confer resistance to the maintenance regimen, thereby increasing subsequent treatment success. Treatment is switched before the overgrowth and archiving of mutant strains that carry resistance against the induction regimen and would limit its future re-use. In silico modelling shows that an optimal trade-off is achieved by switching treatment at \& 80 days after the initiation of antiviral therapy. Evaluation of the proposed treatment strategy demonstrated significant improvements in terms of resistance archiving and virological response, as compared to conventional HAART. While continuous pro-active treatment alternation improved the clinical outcome in a randomized trial, our results indicate that a similar improvement might also be reached after a single pro-active treatment switch. The clinical validity of this finding, however, remains to be shown by a corresponding trial.}, language = {en} } @misc{vonHumboldt2011, author = {von Humboldt, Alexander}, title = {Zenralamerika}, publisher = {Univ.}, address = {San jose}, pages = {119 S.}, year = {2011}, language = {de} } @book{vonHumboldt2011, author = {von Humboldt, Alexander}, title = {Zentralamerika}, editor = {Brignoli, Hector P{\´e}rez}, publisher = {Edit. UCR}, address = {San Jos{\´e}, C.R.}, isbn = {978-9968-46-276-1}, pages = {119 S.}, year = {2011}, language = {de} } @article{vonderMalsburgVasishth2011, author = {von der Malsburg, Titus Raban and Vasishth, Shravan}, title = {What is the scanpath signature of syntactic reanalysis?}, series = {Journal of memory and language}, volume = {65}, journal = {Journal of memory and language}, number = {2}, publisher = {Elsevier}, address = {San Diego}, issn = {0749-596X}, doi = {10.1016/j.jml.2011.02.004}, pages = {109 -- 127}, year = {2011}, abstract = {Which repair strategy does the language system deploy when it gets garden-pathed, and what can regressive eye movements in reading tell us about reanalysis strategies? Several influential eye-tracking studies on syntactic reanalysis (Frazier \& Rayner, 1982; Meseguer, Carreiras, \& Clifton, 2002; Mitchell, Shen, Green, \& Hodgson, 2008) have addressed this question by examining scanpaths, i.e., sequential patterns of eye fixations. However, in the absence of a suitable method for analyzing scanpaths, these studies relied on simplified dependent measures that are arguably ambiguous and hard to interpret. We address the theoretical question of repair strategy by developing a new method that quantifies scanpath similarity. Our method reveals several distinct fixation strategies associated with reanalysis that went undetected in a previously published data set (Meseguer et al., 2002). One prevalent pattern suggests re-parsing of the sentence, a strategy that has been discussed in the literature (Frazier \& Rayner, 1982); however, readers differed tremendously in how they orchestrated the various fixation strategies. Our results suggest that the human parsing system non-deterministically adopts different strategies when confronted with the disambiguating material in garden-path sentences.}, language = {en} } @article{vonBloh2011, author = {von Bloh, Ute}, title = {No concessions made? Law and justice in the epic Loher and Mailer}, series = {Zeitschrift f{\"u}r Literaturwissenschaft und Linguistik}, volume = {41}, journal = {Zeitschrift f{\"u}r Literaturwissenschaft und Linguistik}, number = {163}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Stuttgart}, issn = {0049-8653}, pages = {42 -- 65}, year = {2011}, abstract = {The late mediaeval prose epic Loher und Muller constantly challenges a naive interpretation of what constitutes justice by confronting it over and over again with extreme cases. Generally speaking, 'poetic justice' succeeds in establishing coherence and propel the narrative forward. The constituents of societal norms and of laws are nevertheless relentlessly questioned - to such an extent that the narrative inquiry occasionally departs from the common understanding of justice. With its focus on morality, especially the presence or absence of faith, Loher und Muller is primarily concerned with the potential for conflict inherent in medieval constructions of legality and justice. In doing so, the epic opens up a narrative playground unencumbered by legal constraints as - after all - literature need not comply with medieval jurisdiction and its claims to the validity and scope of its writings. It is literature's privilege to facilitate unfamiliar ways of looking. The playful - but by no means inconsequential - casuistry played out in Loher und Maller gives rise to a 'probable' world tangential to historical reality and its understanding of justice and the law.}, language = {de} } @article{VoltmerSpahnSchaarschmidtetal.2011, author = {Voltmer, Edgar and Spahn, Claudia and Schaarschmidt, Uwe and Kieschke, Ulf}, title = {Work-related behavior and experience patterns of entrepreneurs compared to teachers and physicians}, series = {International archives of occupational and environmental health}, volume = {84}, journal = {International archives of occupational and environmental health}, number = {5}, publisher = {Springer}, address = {New York}, issn = {0340-0131}, doi = {10.1007/s00420-011-0632-9}, pages = {479 -- 490}, year = {2011}, abstract = {Purpose This study examined the status of health-related behavior and experience patterns of entrepreneurs in comparison with teachers and physicians to identify specific health risks and resources. Methods Entrepreneurs (n = 632), teachers (n = 5,196), and physicians (n = 549) were surveyed in a cross-sectional design. The questionnaire Work-related Behavior and Experience Patterns (AVEM) was used for all professions and, in addition, two scales (health prevention and self-confidence) from the Checklist for Entrepreneurs in the sample of entrepreneurs. Results The largest proportion of the entrepreneurs (45\%) presented with a healthy pattern (compared with 18.4\% teachers and 18.3\% physicians). Thirty-eight percent of entrepreneurs showed a risk pattern of overexertion and stress, followed by teachers (28.9\%) and physicians (20.6\%). Unambitious or burnout patterns were seen in only 9.3/8.2\% of entrepreneurs, respectively, and 25.3/27.3\% of teachers, and 39.6/21.5\% of physicians. While the distribution of patterns in teachers and physicians differed significantly between genders, a gender difference was not found among entrepreneurs. Entrepreneurs with the risk pattern of overexertion scored significantly (P < 0.01) lower in self-confidence and health care than those with the healthy pattern. Conclusions The development of a successful enterprise depends, in part, on the health of the entrepreneur. The large proportion of entrepreneurs with the healthy pattern irrespective of gender may support the notion that self-selection effects of healthy individuals in this special career might be important. At the same time, a large proportion was at risk for overexertion and might benefit from measures to cope with professional demands and stress and promote a healthy behavior pattern.}, language = {en} } @article{VolgerWeiss2011, author = {Volger, Helmut and Weiß, Norman}, title = {Vorwort}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60916}, pages = {7 -- 8}, year = {2011}, language = {de} } @article{Volger2011, author = {Volger, Helmut}, title = {Die Reform der Arbeitsmethoden des Sicherheitsrats - eine Bilanz nach zwei Jahrzehnten}, series = {Die Vereinten Nationen zehn Jahre nach dem Millenniumsgipfel 2000 - eine Bilanz}, volume = {2011}, journal = {Die Vereinten Nationen zehn Jahre nach dem Millenniumsgipfel 2000 - eine Bilanz}, number = {9}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-101569}, pages = {39 -- 51}, year = {2011}, abstract = {Literatur}, language = {de} } @article{Volger2011, author = {Volger, Helmut}, title = {Empfehlungen f{\"u}r die zuk{\"u}nftige deutsche UNO-Forschung}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-61246}, pages = {399 -- 407}, year = {2011}, abstract = {Inhalt: - Die deutsche UN-Forschung - Aufgaben der deutschen UN-Forschung - Strukturen der deutschen UN-Forschung - Zentrum f{\"u}r UN-Forschung}, language = {de} } @article{Volger2011, author = {Volger, Helmut}, title = {Die Arbeit des Forschungskreises Vereinte Nationen}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-61230}, pages = {393 -- 397}, year = {2011}, abstract = {Inhalt: - Die Ziele des Forschungskreises - Welche Ziele wurden erreicht? - Fazit und Ausblick}, language = {de} } @article{VojvodaEngstler2011, author = {Vojvoda-Engstler, Gabriela}, title = {Bosnien als ‚Barzakh'}, series = {Texturen - Identit{\"a}ten - Theorien : Ergebnisse des Arbeitstreffens des Jungen Forums Slavistische Literaturwissenschaft in Trier 2010}, journal = {Texturen - Identit{\"a}ten - Theorien : Ergebnisse des Arbeitstreffens des Jungen Forums Slavistische Literaturwissenschaft in Trier 2010}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-58802}, pages = {239 -- 253}, year = {2011}, abstract = {- Situierung der These - Die narrative Strategie - Schlussbemerkung - Literaturverzeichnis - Zur Autorin}, language = {de} } @article{Voigt2011, author = {Voigt, Frank}, title = {Zum Verh{\"a}ltnis von Theorie und Praxis im Lehramtsstudium}, series = {Potsdamer Beitr{\"a}ge zur Hochschulforschung}, journal = {Potsdamer Beitr{\"a}ge zur Hochschulforschung}, number = {1}, issn = {2192-1075}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52776}, pages = {309 -- 315}, year = {2011}, language = {de} } @article{VoigtScheffler2011, author = {Voigt, Andrea and Scheffler, Christiane}, title = {Manual abilities of the elderly - handgrip strength, finger and thumb push strength and opening strength in age comparison}, issn = {0003-5548}, year = {2011}, language = {en} } @article{VoigtScheffler2011, author = {Voigt, Andrea and Scheffler, Christiane}, title = {Manual abilities of the elderly - handgrip strength, finger and thumb push strength and opening strength in age comparison}, series = {Journal of biological and clinical anthropology : Anthropologischer Anzeiger ; Mitteilungsorgan der Gesellschaft f{\"u}r Anthropologie}, volume = {68}, journal = {Journal of biological and clinical anthropology : Anthropologischer Anzeiger ; Mitteilungsorgan der Gesellschaft f{\"u}r Anthropologie}, number = {2}, publisher = {Schweizerbart}, address = {Stuttgart}, issn = {0003-5548}, doi = {10.1127/0003-5548/2011/0090}, pages = {167 -- 173}, year = {2011}, abstract = {The purpose of this paper is to display the static strength capacities of healthy adults in different age categories. A total of 279 healthy German adults at the ages of 20 to 29 years, 50 to 59 years and 60 to 69 years generated their maximum static handgrip, index finger and thumb push strength, as well as their maximum opening strength on a smooth jar lid of 85 mm diameter and on a knurled bottle lid of 31 mm with their right hand. The results show larger male strength than female strength. Significant age-induced differences appear primarily in opening strengths between the age groups 20 to 29 and 50 to 59 years in male subjects and in female opening strengths between the age groups 20 to 29 and 60 to 69 years as well as between the age groups 50 to 59 and 60 to 69 years. Of greatest interest is that elderly men show the largest opening strengths.}, language = {en} } @misc{Vogel2011, type = {Master Thesis}, author = {Vogel, Dominik}, title = {Dem Gemeinwohl verpflichtet? - Was motiviert die Besch{\"a}ftigten des {\"o}ffentlichen Dienstes?}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-51554}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Die Arbeit befasst sich theoretisch und empirisch mit der so genannten Public Service Motivation (PSM) und ihrem Zusammenhang zu anderen psychologischen Motivationstheorien. Die Public Service Motivation geht davon aus, dass {\"o}ffentlich Besch{\"a}ftigte unter anderem dadurch motiviert sind, dass sie in ihrer Arbeit einen Dienst am Gemeinwohl sehen. Auf Basis einer empirischen Erhebung konnte dieses Konstrukt auch f{\"u}r Besch{\"a}ftigte in Deutschland nachgewiesen und der Einfluss soziodemographischer Variablen best{\"a}tigt werden. Dar{\"u}ber hinaus gibt die Arbeit erste Hinweise auf Zusammenh{\"a}nge zu verschiedenen Prozesstheorien der Motivation. Empirisch zeigt sich vor allem zur Gleichheitstheorie und dem darauf aufbauenden Equity Sensitivity Construct ein starker Zusammenhang.}, language = {de} } @article{VockPreckelRolling2011, author = {Vock, Miriam and Preckel, Franzis and Rolling, Heinz}, title = {Mental abilities and school achievement a test of a mediation hypothesis}, series = {Intelligence}, volume = {39}, journal = {Intelligence}, number = {5}, publisher = {Elsevier}, address = {New York}, issn = {0160-2896}, doi = {10.1016/j.intell.2011.06.006}, pages = {357 -- 369}, year = {2011}, abstract = {This study analyzes the interplay of four cognitive abilities - reasoning, divergent thinking, mental speed, and short-term memory - and their impact on academic achievement in school in a sample of adolescents in grades seven to 10 (N = 1135). Based on information processing approaches to intelligence, we tested a mediation hypothesis, which states that the complex cognitive abilities of reasoning and divergent thinking mediate the influence of the basic cognitive abilities of mental speed and short-term memory on achievement. We administered a comprehensive test battery and analyzed the data through structural equation modeling while controlling for the cluster structure of the data. Our findings support the notion that mental speed and short-term memory, as ability factors reflecting basic cognitive processes, exert an indirect influence on academic achievement by affecting reasoning and divergent thinking (total indirect effects: beta=.22 and .24. respectively). Short-term memory also directly affects achievement (beta=.22).}, language = {en} } @article{Virchow2011, author = {Virchow, Fabian}, title = {Die „Demonstrationspolitik" der extremen Rechten im Bundesgebiet und im Land Brandenburg}, series = {Die Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven}, journal = {Die Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven}, isbn = {978-3-86956-038-0}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52208}, pages = {109 -- 128}, year = {2011}, language = {de} } @article{Viktorova2011, author = {Viktorova, Natalia N.}, title = {Einf{\"u}hrung in das internationale Privatrecht in Russland}, series = {Die Woche des russischen Rechts , Potsdam , 10.-15.05.2010 (mit der Moskauer Staatlichen Juristischen O. E. Kutafin Akademie)}, journal = {Die Woche des russischen Rechts , Potsdam , 10.-15.05.2010 (mit der Moskauer Staatlichen Juristischen O. E. Kutafin Akademie)}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-58666}, pages = {199 -- 221}, year = {2011}, abstract = {1. Der Regelungsgegenstand des Internationalen Privatrechts 2. Der Begriff des IPR 3. Die Geschichte des IPR 4. Der Inhalt des IPR 5. Rechtsquellen des IPR 6. Kollisionsnormen 7. R{\"u}ck- und Weiterverweisung (renvoi) 8. Zur Qualifikation im IPR 9. Die Anwendung und Ermittlung des ausl{\"a}ndischen Rechts 10. Ordre public 11. Zwingendes Recht 12. Die grundlegenden Prinzipien des Kollisionsrechts}, language = {de} } @article{VijayakrishnanIssareeCoriloetal.2011, author = {Vijayakrishnan, Balakumar and Issaree, Arisara and Corilo, Yuri E. and Ferreira, Christina Ramires and Eberlin, Marcos N. and Peter, Martin G.}, title = {MSn of the six isomers of (GlcN)(2)(GlcNAc)(2) aminoglucan tetrasaccharides (diacetylchitotetraoses) rules of fragmentation for the sodiated molecules and application to sequence analysis of hetero-chitooligosaccharides}, series = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides}, volume = {84}, journal = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides}, number = {2}, publisher = {Elsevier}, address = {Oxford}, issn = {0144-8617}, doi = {10.1016/j.carbpol.2010.04.041}, pages = {713 -- 726}, year = {2011}, abstract = {The six possible isomers of di-N-acetylchitotetraoses [AADD, ADDA, ADAD, DADA, DAAD, and DDAA, where D stands for 2-amino-2-deoxy-3-D-glucose (GlcN) and A for 2-acetamido-2-deoxy-beta-D-glucose (GlcNAc)] were analyzed by ESI(+)-MSn. Collision induced dissociation via MSn experiments were performed for the sodiated molecules of m/z 769 [M+Na](+) for each isomer, and fragments were generated mainly by glycosidic bond and cross-ring cleavages. Rules of fragmentation were then established. A reducing end D residue yields the (O.2)A(4) cross-ring [M-59+Na](+) fragment of m/z 710 as the most abundant, whereas isomers containing a reducing end A prefer to lose water to form the [M-18+Na](+) ion of m/z 751, as well as abundant (O.2)A(4) cross-ring [M-101+Na](+) fragments of m/z 668 and B-3 [M-221+Na](+) ions of m/z 548. MS3 of C- and Y-type ions shows analogous fragmentation behaviour that allows identification of the reducing end next-neighbour residue. Due to gas-phase anchimeric assistance, B-type cleavage between the glycosidic oxygen and the anomeric carbon atom is favoured when the glycon is an A residue. Relative ion abundances are generally in the order B >> C > Y, but may vary depending on the next neighbour towards the non-reducing end. These fragmentation rules were used for partial sequence analysis of hetero-chitooligosaccharides of the composition D(2)A(3), D(3)A(3), D(2)A(4), D(4)A(3), and D(3)A(4).}, language = {en} } @article{VignonZellwegerRelleKienlenetal.2011, author = {Vignon-Zellweger, Nicolas and Relle, Katharina and Kienlen, Elodie and Alter, Markus L. and Seider, Patrick and Sharkovska, Juliya and Heiden, Susi and Kalk, Philipp and Schwab, Karima and Albrecht-Kuepper, Barbara and Theuring, Franz and Stasch, Johannes-Peter and Hocher, Berthold}, title = {Endothelin-1 overexpression restores diastolic function in eNOS knockout mice}, series = {Journal of hypertension}, volume = {29}, journal = {Journal of hypertension}, number = {5}, publisher = {Lippincott Williams \& Wilkins}, address = {Philadelphia}, issn = {0263-6352}, doi = {10.1097/HJH.0b013e3283450770}, pages = {961 -- 970}, year = {2011}, abstract = {Background The cardiac nitric oxide and endothelin-1 (ET-1) systems are closely linked and play a critical role in cardiac physiology. The balance between both systems is often disturbed in cardiovascular diseases. To define the cardiac effect of excessive ET-1 in a status of nitric oxide deficiency, we compared left ventricular function and morphology in wild-type mice, ET-1 transgenic (ET+/+) mice, endothelial nitric oxide synthase knockout (eNOS(-/-)) mice, and ET(+/+)eNOS(-/-) mice. Methods and results eNOS(-/-) and ET(+/+)eNOS(-/-) mice developed high blood pressure compared with wild-type and ET+/+ mice. Left ventricular catheterization showed that eNOS(-/-) mice, but not ET(+/+)eNOS(-/-), developed diastolic dysfunction characterized by increased end-diastolic pressure and relaxation constant tau. To elucidate the causal molecular mechanisms driving the rescue of diastolic function in ET(+/+)eNOS(-/-) mice, the cardiac proteome was analyzed. Two-dimensional gel electrophoresis coupled to mass spectrometry offers an appropriate hypothesis-free approach. ET-1 overexpression on an eNOS(-/-) background led to an elevated abundance and change in posttranslational state of antioxidant enzymes (e. g., peroxiredoxin-6, glutathione S-transferase mu 2, and heat shock protein beta 7). In contrast to ET(+/+)eNOS(-/-) mice, eNOS(-/-) mice showed an elevated abundance of proteins responsible for sarcomere disassembly (e. g., cofilin-1 and cofilin-2). In ET(+/+)eNOS(-/-) mice, glycolysis was favored at the expense of fatty acid oxidation. Conclusion eNOS(-/-) mice developed diastolic dysfunction; this was rescued by ET-1 transgenic overexpression. This study furthermore suggests that cardiac ET-1 overexpression in case of eNOS deficiency causes specifically the regulation of proteins playing a role in oxidative stress, myocytes contractility, and energy metabolism.}, language = {en} } @article{VidadalaPimpalpalleLinkeretal.2011, author = {Vidadala, Srinivasa Rao and Pimpalpalle, Tukaram M. and Linker, Torsten and Hotha, Srinivas}, title = {Gold-Catalyzed reactions of 2-C-Branched carbohydrates mild glycosidations and selective anomerizations}, series = {European journal of organic chemistry}, journal = {European journal of organic chemistry}, number = {13}, publisher = {Wiley-Blackwell}, address = {Malden}, issn = {1434-193X}, doi = {10.1002/ejoc.201100134}, pages = {2426 -- 2430}, year = {2011}, abstract = {2-C-branched methyl glycosides react with various alcohols under gold catalysis to transglycosylated products. The method is applicable for the convenient synthesis of disaccharides. Without nucleophile a selective anomerization occurs, giving first access to alpha-configured 2-C-nitromethyl glycosides. The results are interesting for the mechanism of gold-catalyzed glycosidations.}, language = {en} } @misc{Vicente2011, author = {Vicente, Luis}, title = {Phase theory}, series = {Journal of linguistics}, volume = {47}, journal = {Journal of linguistics}, number = {3}, publisher = {Cambridge Univ. Press}, address = {New York}, issn = {0022-2267}, doi = {10.1017/S0022226711000193}, pages = {719 -- 724}, year = {2011}, language = {en} } @misc{Vicente2011, author = {Vicente, Luis}, title = {{\´A}ngel J. Gallego, Phase theory}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {539}, issn = {1866-8364}, doi = {10.25932/publishup-41311}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-413116}, pages = {719 -- 724}, year = {2011}, language = {en} } @article{VicedoFrijiaParenteetal.2011, author = {Vicedo, Vicent and Frijia, Gianluca and Parente, Mariano and Caus, Esmeralda}, title = {The late creataceous genera cuvillierinella, cyclopseudedomia, andrhapydionina (Rhapydioninidae, Foraminiferida) in shallow-watercarbonates of pylos (Peloponnese, Greece)}, series = {Journal of foraminiferal research}, volume = {41}, journal = {Journal of foraminiferal research}, number = {2}, publisher = {GeoScienceWorld}, address = {Cambridge}, issn = {0096-1191}, pages = {167 -- 181}, year = {2011}, abstract = {Shell architectures of the larger foraminiferal genera cyclopseudedomia, and Rhapydionina were studied by comparing topotypes of previously described species with new specimens retrieved from Late Cretaceous shallow-water carbonates of Pylos (Peloponnese, Greece), where the three genera are found in association. The megalospheric generation of each genus exhibits a distinctive shell shape in adult specimens (i.e., fan-shaped in Cyclopseudedomia, conical in Rhapydionina, and cylindrical in Cuvillierinella). Although their microspheric adults are similarly thin, flat, and discoidal, they can be identified at the genus level by means of a detailed structural analysis. Cavillierinella shows the septula to be interrupted by a large preseptal space, while Cyclopseudedomia and Rhapydionina exhibit continuous, non-interrupted septula. In addition, Cyclopseudedomia presents only one row of medullar chamberlets, whereas Rhapydionina shows numerous medullar chamberlets distributed in a thick basal layer. Two new species, Cuvillierinella pylosensis and Rhapydionina fleuryi, are described. The former is a more complex taxon than the type species, C salentina, while the latter corresponds to a more primitive species, R. liburnica. Strontium-isotope stratigraphy indicates an uppermost Campanian-lowermost Maastrichtian age for these new species.}, language = {en} } @article{Vergau2011, author = {Vergau, Hans-Joachim}, title = {Die Rolle Deutschlands bei der L{\"o}sung der Namibia-Frage im Rahmen der Vereinten Nationen}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-61050}, pages = {181 -- 191}, year = {2011}, language = {de} } @article{Veith2011, author = {Veith, Mehde}, title = {Zwischen Vereinheitlichung und Vielfalt}, series = {Potsdamer Studien zu Staat, Recht und Politik}, journal = {Potsdamer Studien zu Staat, Recht und Politik}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1867-2663}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60719}, pages = {33 -- 52}, year = {2011}, abstract = {Inhalt: - I. Einleitung - II. Entwicklungsbedingungen und Probleme - II.1. Die konkrete Problemlage nach 1989 - II.2. {\"U}berlagernde Effekte - III. Die L{\"o}sungsans{\"a}tze - III.1. Funktional- und Gebietsreform - III.2. Qualit{\"a}tsaspekte - III.3. Reaktion auf Europ{\"a}isierung - III.4. Adaption von Tendenzen aus der Privatwirtschaft - IV. Fazit}, language = {de} } @article{VaterKoessl2011, author = {Vater, Marianne and Koessl, Manfred}, title = {Comparative aspects of cochlear functional organization in mammals}, series = {Hearing research}, volume = {273}, journal = {Hearing research}, number = {1-2}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0378-5955}, doi = {10.1016/j.heares.2010.05.018}, pages = {89 -- 99}, year = {2011}, abstract = {This review addresses the functional organization of the mammalian cochlea under a comparative and evolutionary perspective. A comparison of the monotreme cochlea with that of marsupial and placental mammals highlights important evolutionary steps towards a hearing organ dedicated to process higher frequencies and a larger frequency range than found in non-mammalian vertebrates. Among placental mammals, there are numerous cochlear specializations which relate to hearing range in adaptation to specific habitats that are superimposed on a common basic design. These are illustrated by examples of specialist ears which evolved excellent high frequency hearing and echolocation (bats and dolphins) and by the example of subterranean rodents with ears devoted to processing low frequencies. Furthermore, structural functional correlations important for tonotopic cochlear organization and predictions of hearing capabilities are discussed.}, language = {en} } @book{VasishthBroe2011, author = {Vasishth, Shravan and Broe, Michael}, title = {The foundations of statistics: a simulation-based approach}, publisher = {Springer-Verlag Berlin Heidelberg}, address = {Berlin, Heidelberg}, isbn = {978-3-642-16312-8}, doi = {10.1007/978-3-642-16313-5}, pages = {178 S.}, year = {2011}, language = {en} } @article{VargasFariasCarretieretal.2011, author = {Vargas, Gabriel and Farias, Marcelo and Carretier, Sebastien and Tassara, Andres and Baize, Stephane and Melnick, Daniel}, title = {Coastal uplift and tsunami effects associated to the 2010 M(w)8.8 Maule earthquake in Central Chile}, series = {Andean geology}, volume = {38}, journal = {Andean geology}, number = {1}, publisher = {Servicio Nacional de Geolog{\`i}a y Miner{\`i}a}, address = {Santiago}, issn = {0718-7106}, doi = {10.5027/andgeoV38n1-a12}, pages = {219 -- 238}, year = {2011}, abstract = {On February 27, 2010 at 03:34:08 AM an M(w)8.8 earthquake, with epicenter located off Cobquecura (73.24 degrees W; 36.29 degrees S), severely hit Central Chile. The tsunami waves that followed this event affected the coastal regions between the cities of Valparaiso and Valdivia, with minor effects as far as Coquimbo. The earthquake occurred along the subduction of the Nazca oceanic plate beneath the South American plate. Coseismic coastal uplift was estimated through observations of bleached lithothamnioids crustose coralline algae, which were exposed after the mainshock between 34.13 degrees S and 38.34 degrees S, suggesting the latitudinal distribution of the earthquake rupture. The measured coastal uplift values varied between 240 +/- 20 cm at sites closer to the trench along the western coast of the Arauco peninsula and 15 +/- 10 cm at sites located farther east. A maximum value of 260 +/- 50 cm was observed at the western coast of Santa Maria Island, which is similar to the reported uplift associated with the 1835 earthquake at Concepcion. Land subsidence values on the order of 0.5 m to 1 m evidenced a change in polarity and position of the coseismic hinge at 110-120 km from the trench. In four sites along the coast we observed a close match between coastal uplift values deduced from bleached lithothamnioids algae and GPS measurements. According to field observations tsunami heights reached ea. 14 m in the coastal area of the Maule Region immediately north of the epicenter, and diminished progressively northwards to 4-2 m near Valparaiso. Along the coast of Cobquecura, tsunami height values were inferior to 2-4 m. More variable tsunami heights of 6-8 m were measured at Dichato-Talcahuano and Tirua-Puerto Saavedra, in the Biobio and Arauco regions, respectively, to the south of the epicenter. According to eyewitnesses, the tsunami reached the coast between 12 to 20 and 30 to 45 minutes in areas located closer and faraway from the earthquake rupture zone, respectively. Destructive tsunami waves arrived also between 2.5 and 4.5 hours after the mainshock, especially along the coast of the Biobio and Arauco regions. The tsunami effects were highly variable along the coast, as a result of geomorphological and bathymetric local conditions, besides potential complexities induced by the main shock.}, language = {en} } @misc{VanDonkIanoraVos2011, author = {Van Donk, Ellen and Ianora, Adrianna and Vos, Matthijs}, title = {Induced defences in marine and freshwater phytoplankton}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, number = {881}, issn = {1866-8372}, doi = {10.25932/publishup-43513}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-435130}, pages = {19}, year = {2011}, abstract = {Many organisms have developed defences to avoid predation by species at higher trophic levels. The capability of primary producers to defend themselves against herbivores affects their own survival, can modulate the strength of trophic cascades and changes rates of competitive exclusion in aquatic communities. Algal species are highly flexible in their morphology, growth form, biochemical composition and production of toxic and deterrent compounds. Several of these variable traits in phytoplankton have been interpreted as defence mechanisms against grazing. Zooplankton feed with differing success on various phytoplankton species, depending primarily on size, shape, cell wall structure and the production of toxins and deterrents. Chemical cues associated with (i) mechanical damage, (ii) herbivore presence and (iii) grazing are the main factors triggering induced defences in both marine and freshwater phytoplankton, but most studies have failed to disentangle the exact mechanism(s) governing defence induction in any particular species. Induced defences in phytoplankton include changes in morphology (e.g. the formation of spines, colonies and thicker cell walls), biochemistry (such as production of toxins, repellents) and in life history characteristics (formation of cysts, reduced recruitment rate). Our categorization of inducible defences in terms of the responsible induction mechanism provides guidance for future work, as hardly any of the available studies on marine or freshwater plankton have performed all the treatments that are required to pinpoint the actual cue(s) for induction. We discuss the ecology of inducible defences in marine and freshwater phytoplankton with a special focus on the mechanisms of induction, the types of defences, their costs and benefits, and their consequences at the community level.}, language = {en} } @misc{VanDonkIanoraVos2011, author = {Van Donk, Ellen and Ianora, Adrianna and Vos, Matthijs}, title = {Induced defences in marine and freshwater phytoplankton a review}, series = {Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica}, volume = {668}, journal = {Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica}, number = {1}, publisher = {Springer}, address = {Dordrecht}, issn = {0018-8158}, doi = {10.1007/s10750-010-0395-4}, pages = {3 -- 19}, year = {2011}, abstract = {Many organisms have developed defences to avoid predation by species at higher trophic levels. The capability of primary producers to defend themselves against herbivores affects their own survival, can modulate the strength of trophic cascades and changes rates of competitive exclusion in aquatic communities. Algal species are highly flexible in their morphology, growth form, biochemical composition and production of toxic and deterrent compounds. Several of these variable traits in phytoplankton have been interpreted as defence mechanisms against grazing. Zooplankton feed with differing success on various phytoplankton species, depending primarily on size, shape, cell wall structure and the production of toxins and deterrents. Chemical cues associated with (i) mechanical damage, (ii) herbivore presence and (iii) grazing are the main factors triggering induced defences in both marine and freshwater phytoplankton, but most studies have failed to disentangle the exact mechanism(s) governing defence induction in any particular species. Induced defences in phytoplankton include changes in morphology (e.g. the formation of spines, colonies and thicker cell walls), biochemistry (such as production of toxins, repellents) and in life history characteristics (formation of cysts, reduced recruitment rate). Our categorization of inducible defences in terms of the responsible induction mechanism provides guidance for future work, as hardly any of the available studies on marine or freshwater plankton have performed all the treatments that are required to pinpoint the actual cue(s) for induction. We discuss the ecology of inducible defences in marine and freshwater phytoplankton with a special focus on the mechanisms of induction, the types of defences, their costs and benefits, and their consequences at the community level.}, language = {en} } @article{vanAfferdenRahmanMosigetal.2011, author = {van Afferden, Manfred and Rahman, Khaja Z. and Mosig, Peter and De Biase, Cecilia and Thullner, Martin and Oswald, Sascha and M{\"u}ller, Roland A.}, title = {Remediation of groundwater contaminated with MTBE and benzene the potential of vertical-flow soil filter systems}, series = {Water research}, volume = {45}, journal = {Water research}, number = {16}, publisher = {Elsevier}, address = {Oxford}, issn = {0043-1354}, doi = {10.1016/j.watres.2011.07.010}, pages = {5063 -- 5074}, year = {2011}, abstract = {Field investigations on the treatment of MTBE and benzene from contaminated groundwater in pilot or full-scale constructed wetlands are lacking hugely. The aim of this study was to develop a biological treatment technology that can be operated in an economic, reliable and robust mode over a long period of time. Two pilot-scale vertical-flow soil filter eco-technologies, a roughing filter (RF) and a polishing filter (PF) with plants (willows), were operated independently in a single-stage configuration and coupled together in a multi-stage (RF + PF) configuration to investigate the MTBE and benzene removal performances. Both filters were loaded with groundwater from a refinery site contaminated with MTBE and benzene as the main contaminants, with a mean concentration of 2970 +/- 816 and 13,966 +/- 1998 mu g L(-1), respectively. Four different hydraulic loading rates (HLRs) with a stepwise increment of 60, 120, 240 and 480 L m(-2) d(-1) were applied over a period of 388 days in the single-stage operation. At the highest HLR of 480 L m(-2)d(-1), the mean concentrations of MTBE and benzene were found to be 550 +/- 133 and 65 +/- 123 mu g L(-1) in the effluent of the RF. In the effluent of the PP system, respective mean MTBE and benzene concentrations of 49 +/- 77 and 0.5 +/- 0.2 mu g L(-1) were obtained, which were well below the relevant MTBE and benzene limit values of 200 and 1 mu g L-1 for drinking water quality. But a dynamic fluctuation in the effluent MTBE concentration showed a lack of stability in regards to the increase in the measured values by nearly 10\%, which were higher than the limit value. Therefore, both (RF + PF) filters were combined in a multi-stage configuration and the combined system proved to be more stable and effective with a highly efficient reduction of the MTBE and benzene concentrations in the effluent. Nearly 70\% of MTBE and 98\% of benzene were eliminated from the influent groundwater by the first vertical filter (RF) and the remaining amount was almost completely diminished (similar to 100\% reduction) after passing through the second filter (PF), with a mean MTBE and benzene concentration of 5 +/- 10 and 0.6 +/- 0.2 mu g L(-1) in the final effluent. The emission rate of volatile organic compounds mass into the air from the systems was less than 1\% of the inflow mass loading rate. The results obtained in this study not only demonstrate the feasibility of vertical-flow soil filter systems for treating groundwater contaminated with MTBE and benzene, but can also be considered a major step forward towards their application under full-scale conditions for commercial purposes in the oil and gas industries.}, language = {en} } @phdthesis{ValverdeSerrano2011, author = {Valverde Serrano, Clara}, title = {Self-assembly behavior in hydrophilic block copolymers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54163}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Block copolymers are receiving increasing attention in the literature. Reports on amphiphilic block copolymers have now established the basis of their self-assembly behavior: aggregate sizes, morphologies and stability can be explained from the absolute and relative block lengths, the nature of the blocks, the architecture and also solvent selectiveness. In water, self-assembly of amphiphilic block copolymers is assumed to be driven by the hydrophobic. The motivation of this thesis is to study the influence on the self-assembly in water of A b B type block copolymers (with A hydrophilic) of the variation of the hydrophilicity of B from non-soluble (hydrophobic) to totally soluble (hydrophilic). Glucose-modified polybutadiene-block-poly(N-isopropylacrylamide) copolymers were prepared and their self-assembly behavior in water studied. The copolymers formed vesicles with an asymmetric membrane with a glycosylated exterior and poly(N-isopropylacrylamide) on the inside. Above the low critical solution temperature (LCST) of poly(N-isopropylacrylamide), the structure collapsed into micelles with a hydrophobic PNIPAM core and glycosylated exterior. This collapse was found to be reversible. As a result, the structures showed a temperature-dependent interaction with L-lectin proteins and were shown to be able to encapsulate organic molecules. Several families of double hydrophilic block copolymers (DHBC) were prepared. The blocks of these copolymers were biopolymers or polymer chimeras used in aqueous two-phase partition systems. Copolymers based on dextran and poly(ethylene glycol) blocks were able to form aggregates in water. Dex6500-b-PEG5500 copolymer spontaneously formed vesicles with PEG as the "less hydrophilic" barrier and dextran as the solubilizing block. The aggregates were found to be insensitive to the polymer's architecture and concentration (in the dilute range) and only mildly sensitive to temperature. Variation of the block length, yielded different morphologies. A longer PEG chain seemed to promote more curved aggregates following the inverse trend usually observed in amphiphilic block copolymers. A shorter dextran promoted vesicular structures as usually observed for the amphiphilic counterparts. The linking function was shown to have an influence of the morphology but not on the self-assembly capability in itself. The vesicles formed by dex6500-b-PEG5500 showed slow kinetics of clustering in the presence of Con A lectin. In addition both dex6500-b-PEG5500 and its crosslinked derivative were able to encapsulate fluorescent dyes. Two additional dextran-based copolymers were synthesized, dextran-b-poly(vinyl alcohol) and dextran-b-poly(vinyl pyrrolidone). The study of their self-assembly allowed to conclude that aqueous two-phase systems (ATPS) is a valid source of inspiration to conceive DHBCs capable of self-assembling. In the second part the principle was extended to polypeptide systems with the synthesis of a poly(N-hydroxyethylglutamine)-block-poly(ethylene glycol) copolymer. The copolymer that had been previously reported to have emulsifying properties was able to form vesicles by direct dissolution of the solid in water. Last, a series of thermoresponsive copolymers were prepared, dextran-b-PNIPAMm. These polymers formed aggregates below the LCST. Their structure could not be unambiguously elucidated but seemed to correspond to vesicles. Above the LCST, the collapse of the PNIPAM chains induced the formation of stable objects of several hundreds of nanometers in radius that evolved with increasing temperature. The cooling of these solution below LCST restored the initial aggregates. This self-assembly of DHBC outside any stimuli of pH, ionic strength, or temperature has only rarely been described in the literature. This work constituted the first formal attempt to frame the phenomenon. Two reasons were accounted for the self-assembly of such systems: incompatibility of the polymer pairs forming the two blocks (enthalpic) and a considerable solubility difference (enthalpic and entropic). The entropic contribution to the positive Gibbs free energy of mixing is believed to arise from the same loss of conformational entropy that is responsible for "the hydrophobic effect" but driven by a competition for water of the two blocks. In that sense this phenomenon should be described as the "hydrophilic effect".}, language = {en} } @article{VallerianiZhangNagaretal.2011, author = {Valleriani, Angelo and Zhang, Gong and Nagar, Apoorva and Ignatova, Zoya and Lipowsky, Reinhard}, title = {Length-dependent translation of messenger RNA by ribosomes}, series = {Physical review : E, Statistical, nonlinear and soft matter physics}, volume = {83}, journal = {Physical review : E, Statistical, nonlinear and soft matter physics}, number = {4}, publisher = {American Physical Society}, address = {College Park}, issn = {1539-3755}, doi = {10.1103/PhysRevE.83.042903}, pages = {4}, year = {2011}, abstract = {A simple measure for the efficiency of protein synthesis by ribosomes is provided by the steady state amount of protein per messenger RNA (mRNA), the so-called translational ratio, which is proportional to the translation rate. Taking the degradation of mRNA into account, we show theoretically that both the translation rate and the translational ratio decrease with increasing mRNA length, in agreement with available experimental data for the prokaryote Escherichia coli. We also show that, compared to prokaryotes, mRNA degradation in eukaryotes leads to a less rapid decrease of the translational ratio. This finding is consistent with the fact that, compared to prokaryotes, eukaryotes tend to have longer proteins.}, language = {en} } @article{ValdiviaOrozco2011, author = {Valdivia Orozco, Pablo Emilio}, title = {Configuraciones del convivir: algunos apuntes sobre el cruce teorico de la novela y el Caribe}, isbn = {978-3-938944-54-7}, year = {2011}, language = {es} } @article{UtechtKlamrothSaalfrank2011, author = {Utecht, Manuel Martin and Klamroth, Tillmann and Saalfrank, Peter}, title = {Optical absorption and excitonic coupling in azobenzenes forming self-assembled monolayers a study based on density functional theory}, series = {Physical chemistry, chemical physics : a journal of European Chemical Societies}, volume = {13}, journal = {Physical chemistry, chemical physics : a journal of European Chemical Societies}, number = {48}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1463-9076}, doi = {10.1039/c1cp22793a}, pages = {21608 -- 21614}, year = {2011}, abstract = {Based on the analysis of optical absorption spectra, it has recently been speculated that the excitonic coupling between individual azobenzene-functionalized alkanethiols arranged in a self-assembled monolayer (SAM) on a gold surface could be strong enough to hinder collective trans-cis isomerization-on top of steric hindrance [Gahl et al., J. Am. Chem. Soc., 2010, 132, 1831]. Using models of SAMs of increasing complexity (dimer, linear N-mers, and two-dimensionally arranged N-mers) and density functional theory on the (TD-) B3LYP/6-31G* level, we determine optical absorption spectra, the nature and magnitude of excitonic couplings, and the corresponding spectral shifts. It is found that at inter-monomer distances of about 20 angstrom and above, TD-B3LYP excitation frequencies (and signal intensities) can be well described by the frequently used point-dipole approximation. Further, calculated blue shifts in optical absorption spectra account for the experimental observations made for azobenzene/gold SAMs, and hint to the fact that they can indeed be responsible for reduced switching probability in densely packed self-assembled structures.}, language = {en} } @phdthesis{Urieta2011, author = {Urieta, Kristin}, title = {Kinder in schwierigen {\"U}bergangssituationen vom Elementar- zum Prim{\"a}rbereich : eine biografieanalytische Studie}, publisher = {Curach Bh{\´a}n Publ}, address = {Berlin}, isbn = {978-3-942002-01-1}, pages = {235 S.}, year = {2011}, language = {de} } @phdthesis{Unterlass2011, author = {Unterlass, Miriam Margarethe}, title = {From monomer salts and their tectonic crystals to aromatic polyimides : development of neoteric synthesis routes}, address = {Potsdam}, pages = {147 S.}, year = {2011}, language = {en} } @phdthesis{Ulrich2011, author = {Ulrich, Mathias}, title = {Permafrost landform studies on Earth : Implications for periglacial landscape evolution and habitability on Mars}, address = {Potsdam}, pages = {VIII, 160 S.}, year = {2011}, language = {en} } @misc{Ulmer2011, author = {Ulmer, Martin}, title = {Stefan Lang, Ausgrenzung und Koexistenz : Judenpolitik und j{\"u}disches Leben in W{\"u}rttemberg und im ‚Land zu Schwaben' (1492-1650). - (Schriften zur s{\"u}dwestdeutschen Landeskunde ; 63) / [rezensiert von] Martin Ulmer}, series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, journal = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, number = {17}, issn = {1614-6492}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53474}, pages = {258 -- 260}, year = {2011}, abstract = {rezensiertes Werk: Lang, Stefan: Ausgrenzung und Koexistenz : Judenpolitik und j{\"u}disches Leben in W{\"u}rttemberg und im ‚Land zu Schwaben' (1492-1650). - Ostfildern : Thorbecke Verlag, 2008. - 432 S.. - (Schriften zur s{\"u}dwestdeutschen Landeskunde ; 63) ISBN 978-3-799-55263-9}, language = {de} } @article{UflackerKowarkZeier2011, author = {Uflacker, Matthias and Kowark, Thomas and Zeier, Alexander}, title = {An instrument for real-time design interaction capture}, isbn = {978-3-642-13756-3}, year = {2011}, language = {en} } @article{Uffelmann2011, author = {Uffelmann, Dirk}, title = {Die Mobilisierung subalternen Sprechens}, series = {Mobilisierte Kulturen}, journal = {Mobilisierte Kulturen}, number = {1}, issn = {2192-3019}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57454}, pages = {377 -- 392}, year = {2011}, language = {de} } @misc{Toennies2011, author = {T{\"o}nnies, Sibylle}, title = {Neumann, F., Behemoth, Struktur und Praxis des Nationalsozialismus 1933 - 1944; Frankfurt am Main, Fischer, 2004}, isbn = {978-3-941880-21-4}, year = {2011}, language = {de} } @article{Toennies2011, author = {T{\"o}nnies, Sibylle}, title = {Ganz oder gar nicht!}, series = {WeltTrends-Papiere}, journal = {WeltTrends-Papiere}, number = {16}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1864-0656}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63313}, pages = {71 -- 76}, year = {2011}, abstract = {Inhalt: Der Nomos der Erde ; Die Moralisierung des V{\"o}lkerrechts ; Weltgesetz ohne Weltexekutive ; „Police Bombing"}, language = {de} }