TY - JOUR A1 - Voigt, Frank T1 - Zum Verhältnis von Theorie und Praxis im Lehramtsstudium JF - Potsdamer Beiträge zur Hochschulforschung Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-52776 SN - 2192-1075 SN - 2192-1083 IS - 1 SP - 309 EP - 315 ER - TY - JOUR A1 - Voigt, Andrea A1 - Scheffler, Christiane T1 - Manual abilities of the elderly - handgrip strength, finger and thumb push strength and opening strength in age comparison Y1 - 2011 SN - 0003-5548 ER - TY - JOUR A1 - Voigt, Andrea A1 - Scheffler, Christiane T1 - Manual abilities of the elderly - handgrip strength, finger and thumb push strength and opening strength in age comparison JF - Journal of biological and clinical anthropology : Anthropologischer Anzeiger ; Mitteilungsorgan der Gesellschaft für Anthropologie N2 - 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. KW - elderly KW - torque KW - handgrip strength KW - opening strength Y1 - 2011 U6 - https://doi.org/10.1127/0003-5548/2011/0090 SN - 0003-5548 VL - 68 IS - 2 SP - 167 EP - 173 PB - Schweizerbart CY - Stuttgart ER - TY - THES A1 - Vogel, Dominik T1 - Dem Gemeinwohl verpflichtet? - Was motiviert die Beschäftigten des öffentlichen Dienstes? T1 - Committed to the common good? - What motivates public employees? N2 - 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 öffentlich Beschäftigte unter anderem dadurch motiviert sind, dass sie in ihrer Arbeit einen Dienst am Gemeinwohl sehen. Auf Basis einer empirischen Erhebung konnte dieses Konstrukt auch für Beschäftigte in Deutschland nachgewiesen und der Einfluss soziodemographischer Variablen bestätigt werden. Darüber hinaus gibt die Arbeit erste Hinweise auf Zusammenhänge zu verschiedenen Prozesstheorien der Motivation. Empirisch zeigt sich vor allem zur Gleichheitstheorie und dem darauf aufbauenden Equity Sensitivity Construct ein starker Zusammenhang. N2 - This thesis theoretically and empirically addresses the construct of Public Service Motivation (PSM) and its relationship to other psychological motivation theories. The concept of Public Service Motivation states that employees working in the public sector are primarily motivated by serving the common good. Based on an empirical study this construct was applied to public employees in Germany. Moreover the thesis collects evidence for the relationship between Public Service Motivation and process theories of motivation. As a key result, strong correlations were found between the PSM and the Equity Sensitivity Construct, a modification of equity theory. T3 - Schriftenreihe für Public und Nonprofit Management - 4 KW - Public Service Motivation KW - Motivation KW - Zieltheorie KW - Gleichheitstheorie KW - Attributionstheorie KW - Public Service Motivation KW - motivation KW - goal theory KW - equity theory KW - attributional theory Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-51554 ER - TY - JOUR A1 - Vock, Miriam A1 - Preckel, Franzis A1 - Rolling, Heinz T1 - Mental abilities and school achievement a test of a mediation hypothesis JF - Intelligence N2 - 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). KW - Academic achievement KW - Mental speed KW - Short-term memory KW - Reasoning KW - Divergent thinking KW - Grades KW - Prediction Y1 - 2011 U6 - https://doi.org/10.1016/j.intell.2011.06.006 SN - 0160-2896 VL - 39 IS - 5 SP - 357 EP - 369 PB - Elsevier CY - New York ER - TY - JOUR A1 - Virchow, Fabian T1 - Die „Demonstrationspolitik“ der extremen Rechten im Bundesgebiet und im Land Brandenburg JF - Die Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-52208 SN - 978-3-86956-038-0 SP - 109 EP - 128 ER - TY - JOUR A1 - Viktorova, Natalia N. T1 - Einführung in das internationale Privatrecht in Russland JF - Die Woche des russischen Rechts , Potsdam , 10.-15.05.2010 (mit der Moskauer Staatlichen Juristischen O. E. Kutafin Akademie) N2 - 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. Rück- und Weiterverweisung (renvoi) 8. Zur Qualifikation im IPR 9. Die Anwendung und Ermittlung des ausländischen Rechts 10. Ordre public 11. Zwingendes Recht 12. Die grundlegenden Prinzipien des Kollisionsrechts Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-58666 SP - 199 EP - 221 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Vijayakrishnan, Balakumar A1 - Issaree, Arisara A1 - Corilo, Yuri E. A1 - Ferreira, Christina Ramires A1 - Eberlin, Marcos N. A1 - Peter, Martin G. T1 - 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 JF - Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides N2 - 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). KW - Chitosan KW - Fragmentation KW - Oligosaccharides KW - Sequence analysis KW - Tandem mass spectrometry Y1 - 2011 U6 - https://doi.org/10.1016/j.carbpol.2010.04.041 SN - 0144-8617 VL - 84 IS - 2 SP - 713 EP - 726 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Vignon-Zellweger, Nicolas A1 - Relle, Katharina A1 - Kienlen, Elodie A1 - Alter, Markus L. A1 - Seider, Patrick A1 - Sharkovska, Juliya A1 - Heiden, Susi A1 - Kalk, Philipp A1 - Schwab, Karima A1 - Albrecht-Kuepper, Barbara A1 - Theuring, Franz A1 - Stasch, Johannes-Peter A1 - Hocher, Berthold T1 - Endothelin-1 overexpression restores diastolic function in eNOS knockout mice JF - Journal of hypertension N2 - 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. KW - cardiovascular diseases KW - endothelin KW - nitric oxide Y1 - 2011 U6 - https://doi.org/10.1097/HJH.0b013e3283450770 SN - 0263-6352 SN - 1473-5598 VL - 29 IS - 5 SP - 961 EP - 970 PB - Lippincott Williams & Wilkins CY - Philadelphia ER - TY - JOUR A1 - Vidadala, Srinivasa Rao A1 - Pimpalpalle, Tukaram M. A1 - Linker, Torsten A1 - Hotha, Srinivas T1 - Gold-Catalyzed reactions of 2-C-Branched carbohydrates mild glycosidations and selective anomerizations JF - European journal of organic chemistry N2 - 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. KW - Anomerization KW - Carbohydrates KW - Glycosidation KW - Gold KW - Synthetic methods Y1 - 2011 U6 - https://doi.org/10.1002/ejoc.201100134 SN - 1434-193X IS - 13 SP - 2426 EP - 2430 PB - Wiley-Blackwell CY - Malden ER - TY - JOUR A1 - Vicente, Luis T1 - Phase theory JF - Journal of linguistics Y1 - 2011 U6 - https://doi.org/10.1017/S0022226711000193 SN - 0022-2267 VL - 47 IS - 3 SP - 719 EP - 724 PB - Cambridge Univ. Press CY - New York ER - TY - GEN A1 - Vicente, Luis T1 - Ángel J. Gallego, Phase theory T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 539 Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-413116 SN - 1866-8364 IS - 539 SP - 719 EP - 724 ER - TY - JOUR A1 - Vicedo, Vicent A1 - Frijia, Gianluca A1 - Parente, Mariano A1 - Caus, Esmeralda T1 - The late creataceous genera cuvillierinella, cyclopseudedomia, andrhapydionina (Rhapydioninidae, Foraminiferida) in shallow-watercarbonates of pylos (Peloponnese, Greece) JF - Journal of foraminiferal research N2 - 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. Y1 - 2011 SN - 0096-1191 VL - 41 IS - 2 SP - 167 EP - 181 PB - GeoScienceWorld CY - Cambridge ER - TY - JOUR A1 - Vergau, Hans-Joachim T1 - Die Rolle Deutschlands bei der Lösung der Namibia-Frage im Rahmen der Vereinten Nationen JF - Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000–2008 Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-61050 SP - 181 EP - 191 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Veith, Mehde T1 - Zwischen Vereinheitlichung und Vielfalt BT - Die Verwaltungsentwicklung im vereinten Deutschland JF - Potsdamer Studien zu Staat, Recht und Politik N2 - Inhalt: - I. Einleitung - II. Entwicklungsbedingungen und Probleme - II.1. Die konkrete Problemlage nach 1989 - II.2. Überlagernde Effekte - III. Die Lösungsansätze - III.1. Funktional- und Gebietsreform - III.2. Qualitätsaspekte - III.3. Reaktion auf Europäisierung - III.4. Adaption von Tendenzen aus der Privatwirtschaft - IV. Fazit Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-60719 SN - 1867-2663 SN - 1869-2443 IS - 3 SP - 33 EP - 52 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Vater, Marianne A1 - Koessl, Manfred T1 - Comparative aspects of cochlear functional organization in mammals JF - Hearing research N2 - 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. Y1 - 2011 U6 - https://doi.org/10.1016/j.heares.2010.05.018 SN - 0378-5955 VL - 273 IS - 1-2 SP - 89 EP - 99 PB - Elsevier CY - Amsterdam ER - TY - BOOK A1 - Vasishth, Shravan A1 - Broe, Michael T1 - The foundations of statistics: a simulation-based approach Y1 - 2011 SN - 978-3-642-16312-8 U6 - https://doi.org/10.1007/978-3-642-16313-5 PB - Springer-Verlag Berlin Heidelberg CY - Berlin, Heidelberg ER - TY - JOUR A1 - Vargas, Gabriel A1 - Farias, Marcelo A1 - Carretier, Sebastien A1 - Tassara, Andres A1 - Baize, Stephane A1 - Melnick, Daniel T1 - Coastal uplift and tsunami effects associated to the 2010 M(w)8.8 Maule earthquake in Central Chile JF - Andean geology N2 - 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. KW - M(w)8.8 Maule earthquake KW - Central Chile KW - Coseismic coastal uplift KW - Tsunami effect Y1 - 2011 U6 - https://doi.org/10.5027/andgeoV38n1-a12 SN - 0718-7106 VL - 38 IS - 1 SP - 219 EP - 238 PB - Servicio Nacional de Geologìa y Minerìa CY - Santiago ER - TY - GEN A1 - Van Donk, Ellen A1 - Ianora, Adrianna A1 - Vos, Matthijs T1 - Induced defences in marine and freshwater phytoplankton BT - a review T2 - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe N2 - 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. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 881 KW - defenses KW - algae KW - review KW - plankton community KW - cyanobacteria KW - toxins Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-435130 SN - 1866-8372 IS - 881 ER - TY - JOUR A1 - Van Donk, Ellen A1 - Ianora, Adrianna A1 - Vos, Matthijs T1 - Induced defences in marine and freshwater phytoplankton a review JF - Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica N2 - 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. KW - Defenses KW - Algae KW - Review KW - Plankton community KW - Cyanobacteria KW - Toxins Y1 - 2011 U6 - https://doi.org/10.1007/s10750-010-0395-4 SN - 0018-8158 SN - 1573-5117 VL - 668 IS - 1 SP - 3 EP - 19 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - van Afferden, Manfred A1 - Rahman, Khaja Z. A1 - Mosig, Peter A1 - De Biase, Cecilia A1 - Thullner, Martin A1 - Oswald, Sascha A1 - Müller, Roland A. T1 - Remediation of groundwater contaminated with MTBE and benzene the potential of vertical-flow soil filter systems JF - Water research N2 - 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. KW - Benzene KW - Groundwater remediation KW - Hydraulic loading rate KW - MTBE KW - Pilot-scale constructed wetland KW - Vertical-flow soil filter KW - Willow tree Y1 - 2011 U6 - https://doi.org/10.1016/j.watres.2011.07.010 SN - 0043-1354 VL - 45 IS - 16 SP - 5063 EP - 5074 PB - Elsevier CY - Oxford ER - TY - THES A1 - Valverde Serrano, Clara T1 - Self-assembly behavior in hydrophilic block copolymers T1 - Selbstorganisation von hydrophilen Blockcopolymeren N2 - 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”. N2 - Blockcopolymere erfahren ein stetig wachsendes Interesse, was an der steigenden Anzahl an Publikationen zu diesem Thema erkennbar ist. Zahlreiche Studien zu amphiphilen Blockcopolymeren haben dabei einige grundlegende Erkenntnisse über deren chemisches und physikalisches Verhalten, vor allem über die Selbstorganisation, hervorgebracht. So können die Größe, die verschiedenen Morphologien und auch die Stabilität der gebildeten Aggregate anhand der relativen und absoluten Blocklängen, die chemischen Struktur der Blöcke, der molekularen Architektur und der Eigenschaften des verwendeten Lösungsmittel erklärt werden. Im speziellen Fall des Wassers als Lösungsmittel bist die Selbstorganisation amphiphiler Blockcopolymere durch den hydrophoben Effekt bedingt. Dieser Arbeit liegt das Interesse an der Selbstorganisation in wässrigem Medium von Blockcopolymeren des Typs A-b-B mit A als hydrophilem Block und B als Block mit variierender Hydrophilie bzw. Hydrophpobie von unlöslich bis vollständig löslich zugrunde. Durch Variation dieser Eigenschaften von Block B soll dessen Einfluss auf das Selbstorganisationsverhalten untersucht werden. Dazu wurden mit Glucose modifizierte Polybutadien-block-Poly(N-Isopropylacrylamid)-Copolymere hergestellt und deren Selbstorganisation in Wasser untersucht. Die Copolymere bilden Vesikel mit einer asymmetrischen Membran, wobei im äußeren Bereich glycolysierte Gruppen und im inneren Bereich Poly(N-Isopropylacrylamid) (PNIPAM) vorliegen. Beim Überschreiten der low critical solution temperature (LCST) kollabiert die vesikuläre Struktur unter Bildung von Mizellen mit einem hydrophoben PNIPAM-Mizellinneren und nach außen gerichteten glycolysierten Blöcken. Diese strukturelle Umwandlung ist reversibel. Die Strukturen zeigten außerdem eine temperaturabhängige Wechselwirkung mit L-Lectin-Proteinen und die Möglichkeit zur Einkapselung organischer Moleküle konnte belegt werden. Des weiteren wurden verschiedene Gruppen von Blockcopolymeren mit zwei hydrophilen Blöcken synthetisiert (double hydrophilic block copolymers – DHBC). Die Blöcke dieser Systeme waren entweder Biopolymere oder Polymerchimäre, die in wässrigen Zwei-Phasen-Trennverfahren eingesetzt werden. Polymere, die auf Dextran- und Poly(ethylenglycol)-Blöcken basieren, zeigen Aggregatbildung in wässriger Phase. Dex6500-b-PEG5500 bildet spontan Vesikel mit PEG als „weniger hydrophilem“ Bestandteil und Dextran als löslichem Block. Die Bildung dieser Vesikel zeigte keine Emfpindlichkeit gegenüber einer Veränderung der Polymerarchitektur und der Konzentration, und nur eine geringe Sensitivität gegenüber Temperaturänderungen. Veränderungen der Blocklängen dagegen beeinflussten die Selbstorganisation und führten zu unterschiedlichen Morphologien. Längere PEG-Blöcke bevorzugten dabei die Bildung eher gekrümmter Aggregate, entgegen dem Trend, der gewöhnlicherweise für amphiphile Blockcopolymere beobachtet wird. Die Verkürzung des Dextran-Blocks fördert die Ausbildung vesikulärer Strukturen, was dem Verhalten der amphiphilen Gegenspieler der DHBC-Systeme entspricht. Die funktionelle Gruppe zur Verbindung der beiden Blöcke hat zwar einen Einfluss auf die Morphologie der gebildeten Aggregate, nicht jedoch auf die eigentliche Fähigkeit der Systeme zur Selbstorganisation. Die Dex6500-b-PEG5500-Vesikel wiesen zudem eine langsame Bildungskinetik in Gegenwart von Con-A-Lectin auf. Des Weiteren waren sowohl Dex6500-b-PEG5500 als auch das quervernetzte Derivate dieses Copolymers in der Lage, Fluoreszenzfarbstoffe einzulagern. Um zu zeigen, dass wässrige Zwei-Phasen-Systeme (aqueous two phase systems – ATPS) eine belastbare Grundlage für die Untersuchung und Entwicklung selbstorganisierender DHBC-Systeme sind, wurden weitere Dextran-basierte Copolymere synthetsisiert: Dextran-b-Poly(vinylalokohol) und Detran-b-Poly(vinylpyrrolidon). In einem zweiten Teil dieser Arbeit wurde das zuvor erarbeitete Prinzip auf auf Polypeptidsysteme ausgeweitet. Dazu wurde ein Poly(N-Hydroxyethylglutamin)-block-Poly(ethylenglycol)-Copolymer hergestellt. Dieses Copolymer, dessen emulgierenden Eigenschaften bereits bekannt waren, wies unmittelbar nach Lösung des Feststoffes in Wasser Vesikelbildung auf. In einem dritten Teil der Studie wurden thermoresponsive Copolymere hergestellt und untersucht: Dextran-b-PNIPAMm. Unterhalb der LCST konnte die Bildung von Aggregaten nachgewiesen werden, deren Struktur nicht zweifelsfrei entschlüsselt werden konnte, wobei jedoch zahlreiche Hinweise auf eine vesikuläre Struktur hindeuten. Oberhalb der LCST wurde durch die Kollabierung der PNIPAM-Ketten die Bildung stabiler Strukturen mit Radien von mehreren hundert Nanometern induziert, deren weitere Entwicklung durch eine weitere Temperaturerhöhung gefördert werden konnte. Durch Rückkühlung in den Temperaturebereich unterhalb der LCST konnten die zuvor beobachteten Aggregate reversibel zurückgebildet werden. Das Selbstorganisationsverhalten von DHBC, unabhängig vom Einfluss des pH-Werts, der Ionenstärke oder der Temperatur are bisher nur in sehr geringem Umfang Gegenstand wissenschaftlicher Veröffentlichungen. Diese Arbeit stellt damit den ersten umfassenden Beitrag zur systematischen Erarbeitung dieses Phänomens dar. Es konnten dabei zwei Ursachen für die beobachteten Selbstorganisationseffekte bestimmt werden: die Inkompatibilität der beiden Polymerblöcke (enthalpischer Effekt) und der Unterschied in deren Löslichkeit (enthalpische und entropische Effekte). Der entropische Beitrag zur positiven Gibbs’schen Freien Mischungsenergie wird dem selben Verlust konformativer Entropie zugeordnet, der auch für den hydrophoben Effekt verantwortlich ist, allerdings angetrieben durch einen Wettbewerb der beiden Polymerblöcke um das Wasser. In diesem Sinne kann man das beobachtete Phänomen als „hydrophilen Effekt“ bezeichnen. KW - Selbstorganisation KW - Blockcopolymere KW - hydrophil KW - self-assembly KW - copolymers KW - hydrophilic Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-54163 ER - TY - JOUR A1 - Valleriani, Angelo A1 - Zhang, Gong A1 - Nagar, Apoorva A1 - Ignatova, Zoya A1 - Lipowsky, Reinhard T1 - Length-dependent translation of messenger RNA by ribosomes JF - Physical review : E, Statistical, nonlinear and soft matter physics N2 - 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. Y1 - 2011 U6 - https://doi.org/10.1103/PhysRevE.83.042903 SN - 1539-3755 VL - 83 IS - 4 PB - American Physical Society CY - College Park ER - TY - JOUR A1 - Valdivia Orozco, Pablo Emilio T1 - Configuraciones del convivir: algunos apuntes sobre el cruce teorico de la novela y el Caribe Y1 - 2011 SN - 978-3-938944-54-7 ER - TY - JOUR A1 - Utecht, Manuel Martin A1 - Klamroth, Tillmann A1 - Saalfrank, Peter T1 - Optical absorption and excitonic coupling in azobenzenes forming self-assembled monolayers a study based on density functional theory JF - Physical chemistry, chemical physics : a journal of European Chemical Societies N2 - 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. Y1 - 2011 U6 - https://doi.org/10.1039/c1cp22793a SN - 1463-9076 VL - 13 IS - 48 SP - 21608 EP - 21614 PB - Royal Society of Chemistry CY - Cambridge ER - TY - THES A1 - Urieta, Kristin T1 - Kinder in schwierigen Übergangssituationen vom Elementar- zum Primärbereich : eine biografieanalytische Studie Y1 - 2011 SN - 978-3-942002-01-1 PB - Curach Bhán Publ CY - Berlin ER - TY - THES A1 - Unterlass, Miriam Margarethe T1 - From monomer salts and their tectonic crystals to aromatic polyimides : development of neoteric synthesis routes Y1 - 2011 CY - Potsdam ER - TY - THES A1 - Ulrich, Mathias T1 - Permafrost landform studies on Earth : Implications for periglacial landscape evolution and habitability on Mars Y1 - 2011 CY - Potsdam ER - TY - JOUR A1 - Ulmer, Martin T1 - Stefan Lang, Ausgrenzung und Koexistenz : Judenpolitik und jüdisches Leben in Württemberg und im ‚Land zu Schwaben’ (1492–1650). - (Schriften zur südwestdeutschen Landeskunde ; 63) / [rezensiert von] Martin Ulmer JF - PaRDeS : Zeitschrift der Vereinigung für Jüdische Studien e.V. N2 - rezensiertes Werk: Lang, Stefan: Ausgrenzung und Koexistenz : Judenpolitik und jüdisches Leben in Württemberg und im ‚Land zu Schwaben’ (1492–1650). - Ostfildern : Thorbecke Verlag, 2008. - 432 S.. - (Schriften zur südwestdeutschen Landeskunde ; 63) ISBN 978-3-799-55263-9 Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-53474 SN - 1614-6492 SN - 1862-7684 IS - 17 SP - 258 EP - 260 ER - TY - JOUR A1 - Uflacker, Matthias A1 - Kowark, Thomas A1 - Zeier, Alexander T1 - An instrument for real-time design interaction capture Y1 - 2011 SN - 978-3-642-13756-3 ER - TY - JOUR A1 - Uffelmann, Dirk T1 - Die Mobilisierung subalternen Sprechens BT - Repräsentationsparadoxe polnisch-britischer Migrantenliteratur JF - Mobilisierte Kulturen Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-57454 SN - 2192-3019 SN - 2192-3027 IS - 1 SP - 377 EP - 392 ER - TY - JOUR A1 - Tönnies, Sibylle T1 - Neumann, F., Behemoth, Struktur und Praxis des Nationalsozialismus 1933 - 1944; Frankfurt am Main, Fischer, 2004 BT - Behemoth, Struktur und Praxis des Nationalsozialismus 1933 - 1944 Y1 - 2011 SN - 978-3-941880-21-4 ER - TY - JOUR A1 - Tönnies, Sibylle T1 - Ganz oder gar nicht! BT - Carl Schmitt und Afghanistan JF - WeltTrends-Papiere N2 - Inhalt: Der Nomos der Erde ; Die Moralisierung des Völkerrechts ; Weltgesetz ohne Weltexekutive ; „Police Bombing“ KW - Afghanistan KW - Friedens- und Konfliktforschung KW - Internationale Politik KW - Afghanistan KW - Peace and Conflict Studies KW - International Politics Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-63313 SN - 1864-0656 IS - 16 SP - 71 EP - 76 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Tönnies, Sibylle T1 - Von allem ein bisschen, keine Bewegung? BT - Eine Erwiderung JF - WeltTrends-Papiere KW - Afghanistan KW - Friedens- und Konfliktforschung KW - Internationale Politik KW - Afghanistan KW - Peace and Conflict Studies KW - International Politics Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-63374 SN - 1864-0656 IS - 16 SP - 87 EP - 89 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - THES A1 - Täger, Philipp T1 - Der Schutz von Menschenrechten im internationalen Investionsrecht : unter besondere Beachtung der Rechte und Pflichten des Exportstaates T2 - Studien zum internationalen Wirtschaftsrecht Y1 - 2011 SN - 978-3-8329-6731-4 VL - 4 PB - Nomos CY - Baden-Baden ER - TY - JOUR A1 - Turukina, L. V. A1 - Pikovskij, Arkadij T1 - Hyperbolic chaos in a system of resonantly coupled weakly nonlinear oscillators JF - Modern physics letters : A, Particles and fields, gravitation, cosmology, nuclear physics N2 - We show that a hyperbolic chaos can be observed in resonantly coupled oscillators near a Hopf bifurcation, described by normal-form-type equations for complex amplitudes. The simplest example consists of four oscillators, comprising two alternatively activated, due to an external periodic modulation, pairs. In terms of the stroboscopic Poincare map, the phase differences change according to an expanding Bernoulli map that depends on the coupling type. Several examples of hyperbolic chaos for different types of coupling are illustrated numerically. KW - Coupled oscillators KW - Hyperbolic chaos Y1 - 2011 U6 - https://doi.org/10.1016/j.physleta.2011.02.017 SN - 0375-9601 VL - 375 IS - 11 SP - 1407 EP - 1411 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Turner, Sarah T. A1 - Pingel, Patrick A1 - Steyrleuthner, Robert A1 - Crossland, Edward J. W. A1 - Ludwigs, Sabine A1 - Neher, Dieter T1 - Quantitative analysis of bulk heterojunction films using linear absorption spectroscopy and solar cell performance JF - Advanced functional materials N2 - A fundamental understanding of the relationship between the bulk morphology and device performance is required for the further development of bulk heterojunction organic solar cells. Here, non-optimized (chloroform cast) and nearly optimized (solvent-annealed o-dichlorobenzene cast) P3HT:PCBM blend films treated over a range of annealing temperatures are studied via optical and photovoltaic device measurements. Parameters related to the P3HT aggregate morphology in the blend are obtained through a recently established analytical model developed by F. C. Spano for the absorption of weakly interacting H-aggregates. Thermally induced changes are related to the glass transition range of the blend. In the chloroform prepared devices, the improvement in device efficiency upon annealing within the glass transition range can be attributed to the growth of P3HT aggregates, an overall increase in the percentage of chain crystallinity, and a concurrent increase in the hole mobilities. Films treated above the glass transition range show an increase in efficiency and fill factor not only associated with the change in chain crystallinity, but also with a decrease in the energetic disorder. On the other hand, the properties of the P3HT phase in the solvent-annealed o-dichlorobenzene cast blends are almost indistinguishable from those of the corresponding pristine P3HT layer and are only weakly affected by thermal annealing. Apparently, slow drying of the blend allows the P3HT chains to crystallize into large domains with low degrees of intra- and interchain disorder. This morphology appears to be most favorable for the efficient generation and extraction of charges. KW - Organic electronics KW - morphology KW - solar cells KW - mobility KW - absorption spectroscopy Y1 - 2011 U6 - https://doi.org/10.1002/adfm.201101583 SN - 1616-301X VL - 21 IS - 24 SP - 4640 EP - 4652 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Tsegaye, Mulugeta Tarekegne A1 - De Bleser, Ria A1 - Iribarren, Carolina T1 - The effect of literacy on oral language processing implications for aphasia tests JF - Clinical linguistics & phonetics N2 - Most studies investigating the impact of literacy on oral language processing have shown that literacy provides phonological awareness skills in the processing of oral language. The implications of these results on aphasia tests could be significant and pose questions on the adequacy of such tools for testing non-literate individuals. Aiming at examining the impact of literacy on oral language processing and its implication on aphasia tests, this study tested 12 non-literate and 12 literate individuals with a modified Amharic version of the Bilingual Aphasia Test (Paradis and Amberber, 1991, Bilingual Aphasia Test. Amharic version. Hillsdale, NJ: Lawrence Erlbaum.). The problems of phonological awareness skills in oral language processing in non-literates are substantiated. In addition, compared with literate participants, non-literate individuals demonstrated difficulties in the word/sentence-picture matching tasks. This study has also revealed that the Amharic version of the Bilingual Aphasia Test may be viable for testing Amharic-speaking non-literate individuals with aphasia when modifications are incorporated. KW - aphasia KW - Bilingual Aphasia Test KW - literacy KW - Amharic KW - phonological awareness KW - word/sentence-picture matching Y1 - 2011 U6 - https://doi.org/10.3109/02699206.2011.567348 SN - 0269-9206 VL - 25 IS - 6-7 SP - 628 EP - 639 PB - Taylor & Francis Group CY - London ER - TY - JOUR A1 - Tschöpe, Okka A1 - Wallschläger, Hans-Dieter A1 - Burkart, Michael A1 - Tielbörger, Katja T1 - Managing open habitats by wild ungulate browsing and grazing a case-study in North-Eastern Germany JF - Applied vegetation science : official organ of the International Association for Vegetation Science N2 - Question: Can wild ungulates efficiently maintain and restore open habitats? Location: Brandenburg, NE Germany. Methods: The effect of wild ungulate grazing and browsing was studied in three successional stages: (1) Corynephorus canescens-dominated grassland; (2) ruderal tall forb vegetation dominated by Tanacetum vulgare; and (3) Pinus sylvestris-pioneer forest. The study was conducted over 3 yr. In each successional stage, six paired 4 m(2)-monitoring plots of permanently grazed versus ungrazed plots were arranged in three random blocks. Removal of grazing was introduced de novo for the study. In each plot, percentage cover of each plant and lichen species and total cover of woody plants was recorded. Results: Wild ungulates considerably affected successional pathways and species composition in open habitats but this influence became evident in alteration of abundances of only a few species. Grazing effects differed considerably between successional stages: species richness was higher in grazed versus ungrazed ruderal and pioneer forest plots, but not in the Corynephorus sites. Herbivory affected woody plant cover only in the Pioneer forest sites. Although the study period was too short to observe drastic changes in species richness and woody plant cover, notable changes in species composition were still detected in all successional stages. Conclusion: Wild ungulate browsing is a useful tool to inhibit encroachment of woody vegetation and to conserve a species-rich, open landscape. KW - Conservation KW - Red deer KW - Fallow deer KW - Succession KW - Species richness KW - Woody plant Y1 - 2011 U6 - https://doi.org/10.1111/j.1654-109X.2010.01119.x SN - 1402-2001 VL - 14 IS - 2 SP - 200 EP - 209 PB - Wiley-Blackwell CY - Hoboken ER - TY - GEN A1 - Troll, K. A1 - Kulkarni, Amit A1 - Wang, W. A1 - Darko, C. A1 - Koumba, A. M. Bivigou A1 - Laschewsky, André A1 - Müller-Buschbaum, Peter A1 - Papadakis, Christine M. T1 - The collapse transition of poly(styrene-b-(N-isopropyl acrylamide)) diblock copolymers in aqueous solution and in thin films T2 - Colloid and polymer science : official journal of the Kolloid-Gesellschaft Y1 - 2011 U6 - https://doi.org/10.1007/s00396-010-2344-1 SN - 0303-402X VL - 289 IS - 2 SP - 227 EP - 227 PB - Springer CY - New York ER - TY - BOOK A1 - Tresp, Uwe T1 - Das Fürstentreffen von Eger und die sächsisch-böhmischen Beziehungen um 1459 Y1 - 2011 SN - 978-3-89923-285-1 ER - TY - BOOK A1 - Tresp, Uwe T1 - Die Teilnahmer und Besucher des Fürsentages zu Eger Y1 - 2011 SN - 978-3-89923-285-1 ER - TY - BOOK A1 - Tresp, Uwe T1 - Editionsanhang Y1 - 2011 SN - 978-3-89923-285-1 ER - TY - JOUR A1 - Tremblay, Jean Christophe A1 - Monturet, Serge A1 - Saalfrank, Peter T1 - The Effects of electron-hole pair coupling on the infrared laser-controlled vibrational excitation of NO on Au(111) JF - The journal of physical chemistry : A, Molecules, spectroscopy, kinetics, environment & general theory N2 - In this work, we present theoretical simulations of laser-driven vibrational control of NO adsorbed on a gold surface. Our goal is to tailor laser pulses to selectively excite specific modes and vibrational eigenstates, as well as to favor photodesorption of the adsorbed molecule. To this end, various control schemes and algorithms are applied. For adsorbates at metallic surfaces, the creation of electron hole pairs in the substrate is known to play a dominant role in the transfer of energy from the system to the surroundings. These nonadiabatic couplings are included perturbatively in our reduced density matrix simulations using a generalization of the state-resolved position-dependent anharmonic rate model we recently introduced. An extension of the reduced density matrix is also proposed to provide a sound model for photodesorption in dissipative systems. Y1 - 2011 U6 - https://doi.org/10.1021/jp205902k SN - 1089-5639 VL - 115 IS - 39 SP - 10698 EP - 10707 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Tremblay, Jean Christophe A1 - Klinkusch, Stefan A1 - Klamroth, Tillmann A1 - Saalfrank, Peter T1 - Dissipative many-electron dynamics of ionizing systems JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr N2 - In this paper, we perform many-electron dynamics using the time-dependent configuration-interaction method in its reduced density matrix formulation (rho-TDCI). Dissipation is treated implicitly using the Lindblad formalism. To include the effect of ionization on the state-resolved dynamics, we extend a recently introduced heuristic model for ionizing states to the rho-TDCI method, which leads to a reduced density matrix evolution that is not norm-preserving. We apply the new method to the laser-driven excitation of H(2) in a strongly dissipative environment, for which the state-resolve lifetimes are tuned to a few femtoseconds, typical for dynamics of adsorbate at metallic surfaces. Further testing is made on the laser-induced intramolecular charge transfer in a quinone derivative as a model for a molecular switch. A modified scheme to treat ionizing states is proposed to reduce the computational burden associated with the density matrix propagation, and it is thoroughly tested and compared to the results obtained with the former model. The new approach scales favorably (similar to N(2)) with the number of configurations N used to represent the reduced density matrix in the rho-TDCI method, as compared to a N(3) scaling for the model in its original form. Y1 - 2011 U6 - https://doi.org/10.1063/1.3532410 SN - 0021-9606 VL - 134 IS - 4 PB - American Institute of Physics CY - Melville ER - TY - JOUR A1 - Tremblay, Jean Christophe T1 - Laser control of molecular excitations in stochastic dissipative media JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr N2 - In the present work, ideas for controlling photochemical reactions in dissipative environments using shaped laser pulses are presented. New time-local control algorithms for the stochastic Schrodinger equation are introduced and compared to their reduced density matrix analog. The numerical schemes rely on time-dependent targets for guiding the reaction along a preferred path. The methods are tested on the vibrational control of adsorbates at metallic surfaces and on the ultrafast electron dynamics in a strong dissipative medium. The selective excitation of the specific states is achieved with improved yield when using the new algorithms. Both methods exhibit similar convergence behavior and results compare well with those obtained using local optimal control for the reduced density matrix. The favorable scaling of the methods allows to tackle larger systems and to control photochemical reactions in dissipative media of molecules with many more degrees of freedom. Y1 - 2011 U6 - https://doi.org/10.1063/1.3587093 SN - 0021-9606 VL - 134 IS - 17 PB - American Institute of Physics CY - Melville ER - TY - JOUR A1 - Trautwein, Ulrich A1 - Nagy, Gabriel A1 - Maaz, Kai T1 - Social disparities and the opening of the secondary school system in Germany JF - Zeitschrift für Erziehungswissenschaft N2 - Efforts to break the link between the school type attended and the qualification awarded are seen an important step in the modernization of Germany's tracked secondary school system. However, it remains disputed whether these efforts have reduced social disparities or in fact increased them. This study examined the transition from lower secondary education in academic- and intermediate-track schools to upper secondary education in general and vocational gymnasium schools in the state of Baden-Wurttemberg. When indicators of parental social background and school-leaving qualifications were controlled, the opening of upper secondary education was found to be associated with a decrease in the social selectivity of upper secondary education for intermediate-track students. At the same time, for those intermediate-track students who were entitled to enter upper secondary education, social background had predictive effects on the transition decision; however, the overall size of these effects was low. KW - Social disparities KW - Student performance KW - Upper secondary education Y1 - 2011 U6 - https://doi.org/10.1007/s11618-011-0220-5 SN - 1434-663X VL - 14 IS - 3 SP - 445 EP - 463 PB - Springer CY - Wiesbaden ER - TY - JOUR A1 - Tran Thanh Tuan, A1 - Scherbaum, Frank A1 - Malischewsky, Peter G. T1 - On the relationship of peaks and troughs of the ellipticity (H/V) of Rayleigh waves and the transmission response of single layer over half-space models JF - Geophysical journal international N2 - One of the key challenges in the context of local site effect studies is the determination of frequencies where the shakeability of the ground is enhanced. In this context, the H/V technique has become increasingly popular and peak frequencies of H/V spectral ratio are sometimes interpreted as resonance frequencies of the transmission response. In the present study, assuming that Rayleigh surface wave is dominant in H/V spectral ratio, we analyse theoretically under which conditions this may be justified and when not. We focus on 'layer over half-space' models which, although seemingly simple, capture many aspects of local site effects in real sedimentary structures. Our starting point is the ellipticity of Rayleigh waves. We use the exact formula of the H/V-ratio presented by Malischewsky & Scherbaum (2004) to investigate the main characteristics of peak and trough frequencies. We present a simple formula illustrating if and where H/V-ratio curves have sharp peaks in dependence of model parameters. In addition, we have constructed a map, which demonstrates the relation between the H/V-peak frequency and the peak frequency of the transmission response in the domain of the layer's Poisson ratio and the impedance contrast. Finally, we have derived maps showing the relationship between the H/V-peak and trough frequency and key parameters of the model such as impedance contrast. These maps are seen as diagnostic tools, which can help to guide the interpretation of H/V spectral ratio diagrams in the context of site effect studies. KW - Site effects KW - Theoretical seismology KW - Wave propagation Y1 - 2011 U6 - https://doi.org/10.1111/j.1365-246X.2010.04863.x SN - 0956-540X VL - 184 IS - 2 SP - 793 EP - 800 PB - Wiley-Blackwell CY - Malden ER - TY - JOUR A1 - Townsley, Leisa K. A1 - Broos, Patrick S. A1 - Corcoran, Michael F. A1 - Feigelson, Eric D. A1 - Gagne, Marc A1 - Montmerle, Thierry A1 - Oey, M. S. A1 - Smith, Nathan A1 - Garmire, Gordon P. A1 - Getman, Konstantin V. A1 - Povich, Matthew S. A1 - Evans, Nancy Remage A1 - Naze, Yael A1 - Parkin, E. R. A1 - Preibisch, Thomas A1 - Wang, Junfeng A1 - Wou, Scott J. A1 - Chu, You-Hua A1 - Cohen, David H. A1 - Gruendl, Robert A. A1 - Hamaguchi, Kenji A1 - King, Robert R. A1 - Mac Low, Mordecai-Mark A1 - McCaughrean, Mark J. A1 - Moffat, Anthony F. J. A1 - Oskinova, Lida A1 - Pittard, Julian M. A1 - Stassun, Keivan G. A1 - Ud-Doula, Asif A1 - Walborn, Nolan R. A1 - Waldron, Wayne L. A1 - Churchwell, Ed A1 - Nictiols, J. S. A1 - Owocki, Stanley P. A1 - Schulz, Norbert S. T1 - An introduction to the chandra carina complex project JF - The astrophysical journal : an international review of spectroscopy and astronomical physics ; Supplement series N2 - The Great Nebula in Carina provides an exceptional view into the violent massive star formation and feedback that typifies giant H II regions and starburst galaxies. We have mapped the Carina star-forming complex in X-rays, using archival Chandra data and a mosaic of 20 new 60 ks pointings using the Chandra X-ray Observatory's Advanced CCD Imaging Spectrometer, as a testbed for understanding recent and ongoing star formation and to probe Carina's regions of bright diffuse X-ray emission. This study has yielded a catalog of properties of > 14,000 X-ray point sources;> 9800 of them have multiwavelength counterparts. Using Chandra's unsurpassed X-ray spatial resolution, we have separated these point sources from the extensive, spatially-complex diffuse emission that pervades the region; X-ray properties of this diffuse emission suggest that it traces feedback from Carina's massive stars. In this introductory paper, we motivate the survey design, describe the Chandra observations, and present some simple results, providing a foundation for the 15 papers that follow in this special issue and that present detailed catalogs, methods, and science results. KW - H II regions KW - stars: massive KW - stars: pre-main sequence KW - X-rays: individual (Carina) KW - X-rays: ISM KW - X-rays: stars Y1 - 2011 U6 - https://doi.org/10.1088/0067-0049/194/1/1 SN - 0067-0049 VL - 194 IS - 1 PB - IOP Publ. Ltd. CY - Bristol ER - TY - JOUR A1 - Tosch, Frank T1 - Wissen aus dem Vollen schöpfen : zur Konzeption und Praxis der Museumspädagogischen Werkstatt im Rochow-Museum Reckahn Y1 - 2011 ER -