@misc{WelkerDittmannThuenemannvonDoehren2012, author = {Welker, Martin and Dittmann-Th{\"u}nemann, Elke and von Doehren, Hans}, title = {Cyanobacteria as a source of natural products}, series = {Methods in enzymology}, volume = {517}, journal = {Methods in enzymology}, number = {1}, editor = {Hopwood, DA}, publisher = {Elsevier}, address = {San Diego}, isbn = {978-0-12-404634-4}, issn = {0076-6879}, doi = {10.1016/B978-0-12-404634-4.00002-4}, pages = {23 -- 46}, year = {2012}, abstract = {Cyanobacteria or blue-green algae from various environments have been recognized as sources of a variety of bioactive metabolites. Strategies of strain isolation from aquatic habitats, and cultivation and harvesting for metabolite production are described. Strategies for screening of compounds are discussed, including their direct MALDI-TOF mass spectrometric detection in whole cells. Genetic approaches including genomic mining, mutagenesis including transcriptional activation, heterologous expression, and in vitro. reconstitution of pathways are presented.}, language = {en} } @phdthesis{Luschtinetz2010, author = {Luschtinetz, Franziska}, title = {Cyaninfarbstoffe als Fluoreszenzsonden in biomimetischen und biologischen Systemen : Fluoreszenz-Korrelations-Spektroskopie und Fluoreszenzanisotropie-Untersuchungen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-48478}, school = {Universit{\"a}t Potsdam}, year = {2010}, abstract = {Um Prozesse in biologischen Systemen auf molekularer Ebene zu untersuchen, haben sich vor allem fluoreszenzspektroskopische Methoden bew{\"a}hrt. Die M{\"o}glichkeit, einzelne Molek{\"u}le zu beobachten, hat zu einem deutlichen Fortschritt im Verst{\"a}ndnis von elementaren biochemischen Prozessen gef{\"u}hrt. Zu einer der bekanntesten Methoden der Einzelmolek{\"u}lspektroskopie z{\"a}hlt die Fluoreszenz-Korrelations-Spektroskopie (FCS), mit deren Hilfe intramolekulare und diffusionsgesteuerte Prozesse in einem Zeitbereich von µs bis ms untersucht werden k{\"o}nnen. Durch die Verwendung von sog. Fluoreszenzsonden k{\"o}nnen Informationen {\"u}ber deren molekulare Mikroumgebung erhalten werden. Insbesondere f{\"u}r die konfokale Mikroskopie und die Einzelmolek{\"u}lspektroskopie werden Fluoreszenzfarbstoffe mit einer hohen Photostabilit{\"a}t und hohen Fluoreszenzquantenausbeute ben{\"o}tigt. Aufgrund ihrer hohen Fluoreszenzquantenausbeute und der M{\"o}glichkeit, maßgeschneiderte" Farbstoffe in einem breiten Spektralbereich f{\"u}r die Absorption und Fluoreszenz zu entwickeln, sind Cyaninfarbstoffe von besonderem Interesse f{\"u}r bioanalytische Anwendungen. Als Fluoreszenzmarker finden diese Farbstoffe insbesondere in der klinischen Diagnostik und den Lebenswissenschaften Verwendung. Die in dieser Arbeit verwendeten Farbstoffe DY-635 und DY-647 sind zwei typische Vertreter dieser Farbstoffklasse. Durch Modifizierung k{\"o}nnen die Farbstoffe kovalent an biologisch relevante Molek{\"u}le gebunden werden. Aufgrund ihres Absorptionsmaximums oberhalb von 630nm werden sie insbesondere in der Bioanalytik eingesetzt. In der vorliegenden Arbeit wurden die spektroskopischen Eigenschaften der Cyaninfarbstoffe DY-635 und DY-647 in biomimetischen und biologischen Modellsystemen untersucht. Zur Charakterisierung wurden dabei neben der Absorptionsspektroskopie insbesondere fluoreszenzspektroskopische Methoden verwendet. Dazu z{\"a}hlen die zeitkorrelierte Einzelphotonenz{\"a}hlung zur Ermittlung des Fluoreszenzabklingverhaltens, Fluoreszenz-Korrelations-Spektroskopie (FCS) zur Beobachtung von Diffusions- und photophysikalischen Desaktivierungsprozessen und die zeitaufgel{\"o}ste Fluoreszenzanisotropie zur Untersuchung der Rotationsdynamik und Beweglichkeit der Farbstoffe im jeweiligen Modellsystem. Das Biotin-Streptavidin-System wurde als Modellsystem f{\"u}r die Untersuchung von Protein-Ligand-Wechselwirkungen verwendet, da der Bindungsmechanismus weitgehend aufgekl{\"a}rt ist. Nach Bindung der Farbstoffe an Streptavidin wurde eine erhebliche Ver{\"a}nderung in den Absorptions- und Fluoreszenzeigenschaften beobachtet. Es wird angenommen, dass diese spektralen Ver{\"a}nderungen durch Wechselwirkung von benachbarten, an ein Streptavidintetramer gebundenen Farbstoffmolek{\"u}len und Bildung von H-Dimeren verursacht wird. F{\"u}r das System Biotin-Streptavidin ist bekannt, dass w{\"a}hrend der Bindung des Liganden (Biotin) an das Protein eine Konformations{\"a}nderung auftritt. Anhand von zeitaufgel{\"o}sten Fluoreszenzanisotropieuntersuchungen konnte in dieser Arbeit gezeigt werden, dass diese strukturellen Ver{\"a}nderungen zu einer starken Einschr{\"a}nkung der Beweglichkeit des Farbstoffes DY-635B f{\"u}hren. Liegt eine Mischung von ungebundenem und Streptavidin-gebundenem Farbstoff vor, k{\"o}nnen die Anisotropieabklingkurven nicht nach einem exponentiellen Verlauf angepasst werden. Es konnte im Rahmen dieser Arbeit gezeigt werden, dass in diesem Fall die Auswertung mit Hilfe des Assoziativen Anisotropiemodells m{\"o}glich ist, welches eine Unterscheidung der Beitr{\"a}ge aus den zwei verschiedenen Mikroumgebungen erm{\"o}glicht. Als zweites Modellsystem dieser Arbeit wurden Mizellen des nichtionischen Tensids Tween-20 eingesetzt. Mizellen bilden eines der einfachsten Systeme, um die Mikroumgebung einer biologischen Membran nachzuahmen. Sind die Farbstoffe in den Mizellen eingelagert, so kommt es zu keiner Ver{\"a}nderung der Mizellgr{\"o}ße. Die ermittelten Werte des Diffusionskoeffizienten der mizellar eingelagerten Farbstoffe spiegeln demzufolge die Translationsbewegung der Tween-20-Mizellen wider. Die Beweglichkeit der Farbstoffe innerhalb der Tween-20-Mizellen wurde durch zeitaufgel{\"o}ste Fluoreszenzanisotropiemessungen untersucht. Neben der „Wackelbewegung", entsprechend dem wobble-in-a-cone-Modell, wird zus{\"a}tzlich noch die laterale Diffusion der Farbstoffe entlang der Mizelloberfl{\"a}che beschrieben.}, language = {de} } @phdthesis{Jordan2017, author = {Jordan, Thomas}, title = {CxNy-materials from supramolecular precursors for "All-Carbon" composite materials}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-398855}, school = {Universit{\"a}t Potsdam}, pages = {157}, year = {2017}, abstract = {Among modern functional materials, the class of nitrogen-containing carbons combines non-toxicity and sustainability with outstanding properties. The versatility of this materials class is based on the opportunity to tune electronic and catalytic properties via the nitrogen content and -motifs: This ranges from the electronically conducting N-doped carbon, where few carbon atoms in the graphitic lattice are substituted by nitrogen, to the organic semiconductor graphitic carbon nitride (g-C₃N₄), with a structure based on tri-s-triazine units. In general, composites can reveal outstanding catalytic properties due to synergistic behavior, e.g. the formation of electronic heterojunctions. In this thesis, the formation of an "all-carbon" heterojunction was targeted, i.e. differences in the electronic properties of the single components were achieved by the introduction of different nitrogen motives into the carbon lattice. Such composites are promising as metal-free catalysts for the photocatalytic water splitting. Here, hydrogen can be generated from water by light irradiation with the use of a photocatalyst. As first part of the heterojunction, the organic semiconductor g-C₃N₄ was employed, because of its suitable band structure for photocatalytic water splitting, high stability and non-toxicity. The second part was chosen as C₂N, a recently discovered semiconductor. Compared to g-C₃N₄, the less nitrogen containing C₂N has a smaller band gap and a higher absorption coefficient in the visible light range, which is expected to increase the optical absorption in the composite eventually leading to an enhanced charge carrier separation due to the formation of an electronic heterojunction. The aim of preparing an "all-carbon" composite included the research on appropriate precursors for the respective components g-C₃N₄ and C₂N, as well as strategies for appropriate structuring. This was targeted by applying precursors which can form supramolecular pre-organized structures. This allows for more control over morphology and atom patterns during the carbonization process. In the first part of this thesis, it was demonstrated how the photocatalytic activity of g-C₃N₄ can be increased by the targeted introduction of defects or surface terminations. This was achieved by using caffeine as a "growth stopping" additive during the formation of the hydrogen-bonded supramolecular precursor complexes. The increased photocatalytic activity of the obtained materials was demonstrated with dye degradation experiments. The second part of this thesis was focused on the synthesis of the second component C₂N. Here, a deep eutectic mixture from hexaketocyclohexane and urea was structured using the biopolymer chitosan. This scaffolding resulted in mesoporous nitrogen-doped carbon monoliths and beads. CO₂- and dye-adsorption experiments with the obtained monolith material revealed a high isosteric heat of CO₂-adsorption and showed the accessibility of the monolithic pore system to larger dye molecules. Furthermore, a novel precursor system for C₂N was explored, based on organic crystals from squaric acid and urea. The respective C₂N carbon with an unusual sheet-like morphology could be synthesized by carbonization of the crystals at 550 °C. With this precursor system, also microporous C₂N carbon with a BET surface area of 865 m²/g was obtained by "salt-templating" with ZnCl₂. Finally, the preparation of a g-C₃N₄/C₂N "all carbon" composite heterojunction was attempted by the self-assembly of g-C₃N₄ and C₂N nanosheets and tested for photocatalytic water splitting. Indeed, the composites revealed high rates of hydrogen evolution when compared to bulk g-C₃N₄. However, the increased catalytic activity was mainly attributed to the high surface area of the nanocomposites rather than to the composition. With regard to alternative composite synthesis ways, first experiments indicated N-Methyl-2-pyrrolidon to be suitable for higher concentrated dispersion of C₂N nanosheets. Eventually, the results obtained in this thesis provide precious synthetic contributions towards the preparation and processing of carbon/nitrogen compounds for energy applications.}, language = {en} } @article{LopezSalasAlbero2021, author = {L{\´o}pez-Salas, Nieves and Albero, Josep}, title = {CxNy}, series = {Frontiers in Materials}, volume = {8}, journal = {Frontiers in Materials}, publisher = {Frontiers Media}, address = {Lausanne}, issn = {2296-8016}, doi = {10.3389/fmats.2021.772200}, pages = {15}, year = {2021}, abstract = {The search for metal-free and visible light-responsive materials for photocatalytic applications has attracted the interest of not only academics but also the industry in the last decades. Since graphitic carbon nitride (g-C3N4) was first reported as a metal-free photocatalyst, this has been widely investigated in different light-driven reactions. However, the high recombination rate, low electrical conductivity, and lack of photoresponse in most of the visible range have elicited the search for alternatives. In this regard, a broad family of carbon nitride (CxNy) materials was anticipated several decades ago. However, the attention of the researchers in these materials has just been awakened in the last years due to the recent success in the syntheses of some of these materials (i.e., C3N3, C2N, C3N, and C3N5, among others), together with theoretical simulations pointing at the excellent physico-chemical properties (i.e., crystalline structure and chemical morphology, electronic configuration and semiconducting nature, or high refractive index and hardness, among others) and optoelectronic applications of these materials. The performance of CxNy, beyond C3N4, has been barely evaluated in real applications, including energy conversion, storage, and adsorption technologies, and further work must be carried out, especially experimentally, in order to confirm the high expectations raised by simulations and theoretical calculations. Herein, we have summarized the scarce literature related to recent results reporting the synthetic routes, structures, and performance of these materials as photocatalysts. Moreover, the challenges and perspectives at the forefront of this field using CxNy materials are disclosed. We aim to stimulate the research of this new generation of CxNy-based photocatalysts, beyond C3N4, with improved photocatalytic efficiencies by harnessing the striking structural, electronic, and optical properties of this new family of materials.}, language = {en} } @article{FrischSaddyFriederici2000, author = {Frisch, Stefan and Saddy, Douglas and Friederici, A. D.}, title = {Cutting a long story (too) short}, year = {2000}, language = {en} } @article{PietzschNiskanenVazdaCruzetal.2022, author = {Pietzsch, Annette and Niskanen, Johannes and Vaz da Cruz, Vinicius and B{\"u}chner, Robby and Eckert, Sebastian and Fondell, Mattis and Jay, Raphael Martin and Lu, Xingye and McNally, Daniel and Schmitt, Thorsten and F{\"o}hlisch, Alexander}, title = {Cuts through the manifold of molecular H2O potential energy surfaces in liquid water at ambient conditions}, series = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {119}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, number = {28}, publisher = {National Acad. of Sciences}, address = {Washington, DC}, issn = {1091-6490}, doi = {10.1073/pnas.2118101119}, pages = {6}, year = {2022}, abstract = {The fluctuating hydrogen bridge bonded network of liquid water at ambient conditions entails a varied ensemble of the underlying constituting H2O molecular moieties. This is mirrored in a manifold of the H2O molecular potentials. Subnatural line width resonant inelastic X-ray scattering allowed us to quantify the manifold of molecular potential energy surfaces along the H2O symmetric normal mode and the local asymmetric O-H bond coordinate up to 1 and 1.5 angstrom, respectively. The comparison of the single H2O molecular potentials and spectroscopic signatures with the ambient conditions liquid phase H2O molecular potentials is done on various levels. In the gas phase, first principles, Morse potentials, and stepwise harmonic potential reconstruction have been employed and benchmarked. In the liquid phase the determination of the potential energy manifold along the local asymmetric O-H bond coordinate from resonant inelastic X-ray scattering via the bound state oxygen ls to 4a(1) resonance is treated within these frameworks. The potential energy surface manifold along the symmetric stretch from resonant inelastic X-ray scattering via the oxygen 1 s to 2b(2) resonance is based on stepwise harmonic reconstruction. We find in liquid water at ambient conditions H2O molecular potentials ranging from the weak interaction limit to strongly distorted potentials which are put into perspective to established parameters, i.e., intermolecular O-H, H-H, and O-O correlation lengths from neutron scattering.}, language = {en} } @article{AndersenPeterRoepstorff1996, author = {Andersen, S. O. and Peter, Martin G. and Roepstorff, Peter}, title = {Cuticular sclerotization in insects}, year = {1996}, language = {en} } @misc{AndersenPerterRoepstorff1992, author = {Andersen, Svend Olav and Perter, Martin G. and Roepstorff, Peter}, title = {Cuticle-catalyzed coupling between N-acetylhistidine and N-acetyldopamine}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-16762}, year = {1992}, abstract = {Several types of insect cuticle contain enzymes catalyzing the formation ofof adducts between N-acetyldopamine (NADA) and N-acetylhistidine (NAH). Two such adducts, NAH-NADA-I and NAH NADA-II, have been isolated and their structures determined. In one of the adducts the link connecting the two residues occurs between the I-position (ß-position) in the NADA side chain and the 1-N atom (τ-N) in the imidazole ring of histidine. Diphenoloxidase activity alone is not sufficient for formation of this adduct, whereas extracts containing both diphenoloxidase and o-quinone-p-quinone methide isomerase activities catalyze the coupling reaction. The adduct consists of a mixture of two diastereomers and they are presumably formed by spontaneous reaction between enzymatically produced NADA-p-quinone methide and N-acetylhistidine. The other adduct has been identified as a ring addition product of N-acetylhistidine and NADA. In contrast to the former adduct it can be formed by incubation of the two substrates with mushroom tyrosinase alone. An adduct between N-acetylhistidine and the benzodioxan-type NADA-dimer is produced in vitro, when the N-acetylhistidine-NADA adduct is incubated with NADA and locust cuticle containing a 1,2-dehydro-NADA generating enzyme system. Trimeric NADA-polymerization products of the substituted benzodioxan-type have been obtained from in vivo sclerotized locust cuticle, confirming the ability of cuticle to produce NADA-oligomers. The results indicate that some insect cuticles contain enzymes promoting linkage of oxidized NADA to histidine residues. It is suggested that histidine residues in the cuticular proteins can serve as acceptors for oxidized NADA and that further addition of NADA-residues to the phenolic groups of bound NADA can occur, resulting in formation of protein-linked NADA-oligomers. The coupling reactions identified may be an important step in natural cuticular sclerotization.}, language = {en} } @article{CompartSinghFettkeetal.2023, author = {Compart, Julia and Singh, Aakanksha and Fettke, J{\"o}rg and Apriyanto, Ardha}, title = {Customizing starch properties}, series = {Polymers}, volume = {15}, journal = {Polymers}, number = {16}, publisher = {MDPI}, address = {Basel}, issn = {2073-4360}, doi = {10.3390/polym15163491}, pages = {20}, year = {2023}, abstract = {Starch has been a convenient, economically important polymer with substantial applications in the food and processing industry. However, native starches present restricted applications, which hinder their industrial usage. Therefore, modification of starch is carried out to augment the positive characteristics and eliminate the limitations of the native starches. Modifications of starch can result in generating novel polymers with numerous functional and value-added properties that suit the needs of the industry. Here, we summarize the possible starch modifications in planta and outside the plant system (physical, chemical, and enzymatic) and their corresponding applications. In addition, this review will highlight the implications of each starch property adjustment.}, language = {en} } @article{SteinEggert2006, author = {Stein, Maureen and Eggert, Sandy}, title = {Customer Relationship Management, Erfolg durch unternehmensweite Kundenorientierung : Markt{\"u}bersicht zu CRM-L{\"o}sungen}, year = {2006}, language = {de} } @article{LattemannRobraBissantz2006, author = {Lattemann, Christoph and Robra-Bissantz, Susanne}, title = {Customer governance : IC based concepts for a successful customer integration}, year = {2006}, language = {en} } @article{MuellerSeitzDautzenbergCreusenetal.2009, author = {M{\"u}ller-Seitz, Gordon and Dautzenberg, Kirsti and Creusen, Utho and Stromereder, Christine}, title = {Customer acceptance of RFID technology : evidence from the German electronic retail sector}, issn = {0969-6989}, year = {2009}, language = {en} } @article{KimHeyneAbouserieetal.2018, author = {Kim, Yohan and Heyne, Benjamin and Abouserie, Ahed and Pries, Christopher and Ippen, Christian and G{\"u}nter, Christina and Taubert, Andreas and Wedel, Armin}, title = {CuS nanoplates from ionic liquid precursors-Application in organic photovoltaic cells}, series = {The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr}, volume = {148}, journal = {The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr}, number = {19}, publisher = {American Institute of Physics}, address = {Melville}, issn = {0021-9606}, doi = {10.1063/1.4991622}, pages = {10}, year = {2018}, abstract = {Hexagonal p-type semiconductor CuS nanoplates were synthesized via a hot injection method from bis(trimethylsilyl) sulfide and the ionic liquid precursor bis(N-dodecylpyridinium) tetrachloridocuprate( II). The particles have a broad size distribution with diameters between 30 and 680 nm and well-developed crystal habits. The nanoplates were successfully incorporated into organic photovoltaic (OPV) cells as hole conduction materials. The power conversion efficiency of OPV cells fabricated with the nanoplates is 16\% higher than that of a control device fabricated without the nanoplates. (C) 2018 Author(s).}, language = {en} } @book{MaChen2004, author = {Ma, Li and Chen, Dezhong}, title = {Curve Shotening in a Riemannian Manifold}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Arbeitsgruppe Partiell}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Arbeitsgruppe Partiell}, publisher = {Univ.}, address = {Potsdam}, issn = {1437-739X}, pages = {20 S.}, year = {2004}, language = {en} } @article{Boeckmann1996, author = {B{\"o}ckmann, Christine}, title = {Curve fitting and identification of physical spectra}, year = {1996}, language = {en} } @article{Boeckmann1996, author = {B{\"o}ckmann, Christine}, title = {Curve fitting and identification of physical spectra}, year = {1996}, language = {en} } @book{Boeckmann1992, author = {B{\"o}ckmann, Christine}, title = {Curve fitting and identification of physical spectra}, series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, volume = {1992, 18}, journal = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik}, publisher = {Univ.}, address = {Potsdam}, pages = {17 Bl.}, year = {1992}, language = {en} } @article{AnderssonMetzger2010, author = {Andersson, Lars and Metzger, Jan}, title = {Curvature estimates for stable marginally trapped surfaces}, issn = {0022-040X}, year = {2010}, abstract = {We derive local integral and sup-estimates for the curvature of stable marginally outer trapped surfaces in a sliced space-time. The estimates bound the shear of a marginally outer trapped surface in terms of the intrinsic and extrinsic curvature of a slice containing the surface. These estimates are well adapted to situations of physical interest, such as dynamical horizons.}, language = {en} } @article{MeierZoellner2002, author = {Meier, Bernd and Z{\"o}llner, Hermann}, title = {Curriculumentwicklung f{\"u}r eine arbeitsorientierte Allgemeinbildung in der Sekundarstufe I}, year = {2002}, language = {de} } @book{OPUS4-28110, title = {Curriculum Sachunterricht}, series = {Probleme und Perspektiven des Sachunterrichts}, volume = {5}, journal = {Probleme und Perspektiven des Sachunterrichts}, editor = {Lauterbach, Roland}, publisher = {IPN}, address = {Kiel}, isbn = {3-89088-092-4}, pages = {212 S.}, year = {1994}, language = {de} } @article{RendonEnriquezTauschScherf2016, author = {Rendon-Enriquez, I. N. and Tausch, M. W. and Scherf, Ullrich}, title = {Curricular Innovation Electrochromic Window with conductive Polymers}, series = {Chemie in unserer Zeit}, volume = {50}, journal = {Chemie in unserer Zeit}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0009-2851}, doi = {10.1002/ciuz.201600734}, pages = {400 -- 405}, year = {2016}, abstract = {The construction of a low-cost potentiostat and an electrochemical cell are described. Both have been used for the potentiostatic deposition of conducting polymers on FTO-coated glass. According to a reported procedure from literature an electrochromic window has been prepared and tested. Furthermore a novel window containing an additional electrodeposited polymer layer that shows a more pronounced electrochromism than the literature example is described for the first time. The required chemicals are inexpensive as well as the entire electrochemical equipment.}, language = {de} } @phdthesis{Yang2005, author = {Yang, Sujuan}, title = {Curricula von praxisnahen Studieng{\"a}ngen in Deutschland und China im Vergleich : am Beispiel des Studienganges Informatik oder {\"a}hnlicher Fachrichtungen}, series = {Studien zur Berufsp{\"a}dagogik}, volume = {16}, journal = {Studien zur Berufsp{\"a}dagogik}, publisher = {Kova?}, address = {Hamburg}, isbn = {3-8300-1913-0}, issn = {1610-6962}, pages = {IX, 212 S. : graph. Darst.}, year = {2005}, language = {de} } @article{MeisterLiperovskySchlegeletal.1995, author = {Meister, Claudia-Veronika and Liperovsky, Viktor A. and Schlegel, K. and Haldoupis, Ch.}, title = {Currents and turbulence in and near mid-latitude sporadic e-layers caused by strong acoustic impulses}, series = {Preprint NLD}, volume = {11}, journal = {Preprint NLD}, publisher = {Univ.}, address = {Potsdam}, pages = {15 S.}, year = {1995}, language = {en} } @article{ZenichowskiDokicKlamrothetal.2012, author = {Zenichowski, Karl and Dokic, Jadranka and Klamroth, Tillmann and Saalfrank, Peter}, title = {Current versus temperature-induced switching of a single molecule - open-system density matrix theory for 1,5-cyclooctadiene on Si(100)}, series = {The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr}, volume = {136}, journal = {The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr}, number = {9}, publisher = {American Institute of Physics}, address = {Melville}, issn = {0021-9606}, doi = {10.1063/1.3692229}, pages = {13}, year = {2012}, abstract = {The switching of single cyclooctadiene molecules chemisorbed on a Si(100) surface between two stable conformations, can be achieved with a scanning tunneling microscope [Nacci , Phys. Rev. B 77, 121405(R) (2008)]. Recently, it was shown by quantum chemical and quantum dynamical simulations that major experimental facts can be explained by a single-mode model with switching enforced by inelastic electron tunneling (IET) excitations and perturbed by vibrational relaxation [Nacci , Nano Lett. 9, 2997 (2009)]. In the present paper, we extend the previous theoretical work in several respects: (1) The model is generalized to a two-mode description in which two C2H4 units of COD can move independently; (2) contributions of dipole and, in addition, (cation and anion) resonance-IET rates are considered; (3) the harmonic-linear vibrational relaxation model used previously is generalized to anharmonic vibrations. While the present models highlight generic aspects of IET-switching between two potential minima, they also rationalize specific experimental findings for COD/Si(100): (1) A single-electron excitation mechanism with a linear dependence of the switching rate on tunneling current I, (2) the capability to switch both at negative and positive sample biases, and (3) a crossover temperature around similar to 60 K from an IET-driven, T-independent atom tunneling regime, to classical over-the-barrier isomerization with exponential T-dependence at higher temperatures for a bias voltage of +1.5 V and an average tunneling current of 0.73 nA.}, language = {en} } @article{NacciFoelschZenichowskietal.2009, author = {Nacci, Christophe and Foelsch, Stefan and Zenichowski, Karl and Dokic, Jadranka and Klamroth, Tillmann and Saalfrank, Peter}, title = {Current versus temperature-induced switching in a single-molecule tunnel junction : 1,5 cyclooctadiene on Si(001)}, issn = {1530-6984}, doi = {10.1021/Nl901419g}, year = {2009}, abstract = {The biconformational switching of single cyclooctadiene molecules chemisorbed on a Si(001) surface was explored by quantum chemical and quantum dynamical calculations and low-temperature scanning tunneling microscopy experiments. The calculations rationalize the experimentally observed switching driven by inelastic electron tunneling (IET) at 5 K. At higher temperatures, they predict a controllable crossover behavior between IET-driven and thermally activated switching, which is fully confirmed by experiment.}, language = {en} } @article{EhlertFrankHaleyetal.2011, author = {Ehlert, C. and Frank, M. and Haley, B. A. and Boeniger, Urs and De Deckker, P. and Gingele, F. X.}, title = {Current transport versus continental inputs in the eastern Indian Ocean Radiogenic isotope signatures of clay size sediments}, series = {Geochemistry, geophysics, geosystems}, volume = {12}, journal = {Geochemistry, geophysics, geosystems}, number = {12}, publisher = {American Geophysical Union}, address = {Washington}, issn = {1525-2027}, doi = {10.1029/2011GC003544}, pages = {17}, year = {2011}, abstract = {Analyses of radiogenic neodymium (Nd), strontium (Sr), and lead (Pb) isotope compositions of clay-sized detrital sediments allow detailed tracing of source areas of sediment supply and present and past transport of particles by water masses in the eastern Indian Ocean. Isotope signatures in surface sediments range from -21.5 (epsilon Nd), 0.8299 ((87)Sr/(86S)r), and 19.89 ((206)Pb/(204)Pb) off northwest Australia to + 0.7 (epsilon Nd), 0.7069 ((87)Sr/(86)Sr), and 17.44 ((206)Pb/(204)Pb) southwest of Java. The radiogenic isotope signatures primarily reflect petrographic characteristics of the surrounding continental bedrocks but are also influenced by weathering-induced grain size effects of Pb and Sr isotope systems with superimposed features that are caused by current transport of clay-sized particles, as evidenced off Australia where a peculiar isotopic signature characterizes sediments underlying the southward flowing Leeuwin Current and the northward flowing West Australian Current (WAC). Gravity core FR10/95-GC17 off west Australia recorded a major isotopic change from Last Glacial Maximum values of -10 (epsilon Nd), 0.745 ((87S)r/(86)Sr), and 18.8 ((206)Pb/(204)Pb) to Holocene values of -22 (epsilon Nd), 0.8 ((87)Sr/(86)Sr), and 19.3 ((206)Pb/(204)Pb), which documents major climatically driven changes of the WAC and in local riverine particle supply from Australia during the past 20 kyr. In contrast, gravity core FR10/95-GC5 located below the present-day pathway of the Indonesian throughflow (ITF) shows a much smaller isotopic variability, indicating a relatively stable ITF hydrography over most of the past 92 kyr. Only the surface sediments differ significantly in their isotopic composition, indicating substantial changes in erosional sources attributed to a change of the current regime during the past 5 kyr.}, language = {en} } @book{Schmidt1998, author = {Schmidt, Hans-J{\"u}rgen}, title = {Current topics in mathematical cosmology : proceedings of the International Seminar ; Potsdam, Germany 30 March 4 April 1998}, editor = {Rainer, Martin}, publisher = {World Scientific}, address = {Singapore [u.a.]}, isbn = {981-023627-1}, pages = {XVII, 484 S.}, year = {1998}, language = {en} } @article{KapernaumLangeEbertetal.2022, author = {Kapernaum, Nadia and Lange, Alyna and Ebert, Max and Grunwald, Marco A. and H{\"a}ge, Christian and Marino, Sebastian and Zens, Anna and Taubert, Andreas and Gießelmann, Frank and Laschat, Sabine}, title = {Current topics in ionic liquid crystals}, series = {ChemPlusChem}, volume = {87}, journal = {ChemPlusChem}, number = {1}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {2192-6506}, doi = {10.1002/cplu.202100397}, pages = {38}, year = {2022}, abstract = {Ionic liquid crystals (ILCs), that is, ionic liquids exhibiting mesomorphism, liquid crystalline phases, and anisotropic properties, have received intense attention in the past years. Among others, this is due to their special properties arising from the combination of properties stemming from ionic liquids and from liquid crystalline arrangements. Besides interesting fundamental aspects, ILCs have been claimed to have tremendous application potential that again arises from the combination of properties and architectures that are not accessible otherwise, or at least not accessible easily by other strategies. The current review highlights recent developments in ILC research, starting with some key fundamental aspects. Further subjects covered include the synthesis and variations of modern ILCs, including the specific tuning of their mesomorphic behavior. The review concludes with reflections on some applications that may be within reach for ILCs and finally highlights a few key challenges that must be overcome prior and during true commercialization of ILCs.}, language = {en} } @misc{ReicheKratzHofmannetal.2011, author = {Reiche, J{\"u}rgen and Kratz, Karl and Hofmann, Dieter and Lendlein, Andreas}, title = {Current status of Langmuir monolayer degradation of polymeric biomaterials}, series = {The international journal of artificial organs}, volume = {34}, journal = {The international journal of artificial organs}, number = {2}, publisher = {Wichtig}, address = {Milano}, issn = {0391-3988}, doi = {10.5301/IJAO.2011.6401}, pages = {123 -- 128}, year = {2011}, abstract = {Langmuir monolayer degradation (LMD) experiments with polymers possessing outstanding biomedical application potential yield information regarding the kinetics of their hydrolytic or enzymatic chain scission under well-defined and adjustable degradation conditions. A brief review is given of LMD investigations, including the author's own work on 2-dimensional (2D) polymer systems, providing chain scission data, which are not disturbed by simultaneously occurring transport phenomena, such as water penetration into the sample or transport of scission fragments out of the sample. A knowledge-based approach for the description and simulation of polymer hydrolytic and enzymatic degradation based on a combination of fast LMD experiments and computer simulation of the water penetration is briefly introduced. Finally, the advantages and disadvantages of this approach are discussed.}, language = {en} } @article{Kellmann2002, author = {Kellmann, Michael}, title = {Current status and directions of recovery research}, isbn = {0-7360-3400-5}, year = {2002}, language = {en} } @article{OmotoshoAyegbaEmuoyibofarheetal.2019, author = {Omotosho, Adebayo and Ayegba, Peace and Emuoyibofarhe, Justice and Meinel, Christoph}, title = {Current State of ICT in Healthcare Delivery in Developing Countries}, series = {International Journal of Online and Biomedical Engineering}, volume = {15}, journal = {International Journal of Online and Biomedical Engineering}, number = {8}, publisher = {Kassel University Press}, address = {Kassel}, issn = {2626-8493}, doi = {10.3991/ijoe.v15i08.10294}, pages = {91 -- 107}, year = {2019}, abstract = {Electronic health is one of the most popular applications of information and communication technologies and it has contributed immensely to health delivery through the provision of quality health service and ubiquitous access at a lower cost. Even though this mode of health service is increasingly becoming known or used in developing nations, these countries are faced with a myriad of challenges when implementing and deploying e-health services on both small and large scale. It is estimated that the Africa population alone carries the highest percentage of the world's global diseases despite its certain level of e-health adoption. This paper aims at analyzing the progress so far and the current state of e-health in developing countries particularly Africa and propose a framework for further improvement.}, language = {en} } @book{OPUS4-26102, title = {Current societal concerns about justice}, editor = {Montada, Leo and Lerner, Melvin J.}, publisher = {Plenum Press}, address = {New York}, pages = {286 S.}, year = {1996}, language = {en} } @misc{SchmidtSachseWalz2016, author = {Schmidt, Katja and Sachse, Ren{\´e} and Walz, Ariane}, title = {Current role of social benefits in ecosystem service assessments}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {915}, issn = {1866-8372}, doi = {10.25932/publishup-44202}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-442024}, pages = {49 -- 64}, year = {2016}, abstract = {Ecosystem services have a significant impact on human wellbeing. While ecosystem services are frequently represented by monetary values, social values and underlying social benefits remain under explored. The purpose of this study is to assess whether and how social benefits have been explicitly addressed within socio-economic and socio-cultural ecosystem services research, ultimately allowing a better understanding between ecosystem services and human well-being. In this paper, we reviewed 115 international primary valuation studies and tested four hypotheses associated to the identification of social benefits of ecosystem services using logistic regressions. Tested hypotheses were that (1) social benefits are mostly derived in studies that assess cultural ecosystem services as opposed to other ecosystem service types, (2) there is a pattern of social benefits and certain cultural ecosystem services assessed simultaneously, (3) monetary valuation techniques go beyond expressing monetary values and convey social benefits, and (4) directly addressing stakeholder's views the consideration of social benefits in ecosystem service assessments. Our analysis revealed that (1) a variety of social benefits are valued in studies that assess either of the four ecosystem service types, (2) certain social benefits are likely to co-occur in combination with certain cultural ecosystem services, (3) of the studies that employed monetary valuation techniques, simulated market approaches overlapped most frequently with the assessment of social benefits and (4) studies that directly incorporate stakeholder's views were more likely to also assess social benefits. (C) 2016 Elsevier B.V. All rights reserved.}, language = {en} } @misc{SchmidtSachseWalz2016, author = {Schmidt, Katja and Sachse, Rene and Walz, Ariane}, title = {Current role of social benefits in ecosystem service assessments}, series = {Landscape and urban planning : an international journal of landscape ecology, planning and design}, volume = {149}, journal = {Landscape and urban planning : an international journal of landscape ecology, planning and design}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0169-2046}, doi = {10.1016/j.landurbplan.2016.01.005}, pages = {49 -- 64}, year = {2016}, abstract = {Ecosystem services have a significant impact on human wellbeing. While ecosystem services are frequently represented by monetary values, social values and underlying social benefits remain underexplored. The purpose of this study is to assess whether and how social benefits have been explicitly addressed within socio-economic and socio-cultural ecosystem services research, ultimately allowing a better understanding between ecosystem services and human well-being. In this paper, we reviewed 115 international primary valuation studies and tested four hypotheses associated to the identification of social benefits of ecosystem services using logistic regressions. Tested hypotheses were that (1) social benefits are mostly derived in studies that assess cultural ecosystem services as opposed to other ecosystem service types, (2) there is a pattern of social benefits and certain cultural ecosystem services assessed simultaneously, (3) monetary valuation techniques go beyond expressing monetary values and convey social benefits, and (4) directly addressing stakeholde\&\#341;s views the consideration of social benefits in ecosystem service assessments. Our analysis revealed that (1) a variety of social benefits are valued in studies that assess either of the four ecosystem service types, (2) certain social benefits are likely to co-occur in combination with certain cultural ecosystem services, (3) of the studies that employed monetary valuation techniques, simulated market approaches overlapped most frequently with the assessment of social benefits and (4) studies that directly incorporate stakeholder's views were more likely to also assess social benefits.}, language = {en} } @article{VincentKenfackSenthilkumaretal.2010, author = {Vincent, Uchechukwu E. and Kenfack, Anatole and Senthilkumar, Dharmapuri Vijayan and Mayer, Dieter and Kurths, J{\"u}rgen}, title = {Current reversals and synchronization in coupled ratchets}, issn = {1539-3755}, doi = {10.1103/Physreve.82.046208}, year = {2010}, abstract = {Current reversal is an intriguing phenomenon that has been central to recent experimental and theoretical investigations of transport based on ratchet mechanism. By considering a system of two interacting ratchets, we demonstrate how the coupling can be used to control the reversals. In particular, we find that current reversal that exists in a single driven ratchet system can ultimately be eliminated with the presence of a second ratchet. For specific coupling strengths a current-reversal free regime has been detected. Furthermore, in the fully synchronized state characterized by the coupling threshold k(th), a specific driving amplitude a(opt) is found for which the transport is optimum.}, language = {en} } @misc{SieckIbischMoloneyetal.2017, author = {Sieck, Mungla and Ibisch, Pierre L. and Moloney, Kirk A. and Jeltsch, Florian}, title = {Current models broadly neglect specific needs of biodiversity conservation in protected areas under climate change}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-400894}, pages = {12}, year = {2017}, abstract = {Background Protected areas are the most common and important instrument for the conservation of biological diversity and are called for under the United Nations' Convention on Biological Diversity. Growing human population densities, intensified land-use, invasive species and increasing habitat fragmentation threaten ecosystems worldwide and protected areas are often the only refuge for endangered species. Climate change is posing an additional threat that may also impact ecosystems currently under protection. Therefore, it is of crucial importance to include the potential impact of climate change when designing future nature conservation strategies and implementing protected area management. This approach would go beyond reactive crisis management and, by necessity, would include anticipatory risk assessments. One avenue for doing so is being provided by simulation models that take advantage of the increase in computing capacity and performance that has occurred over the last two decades. Here we review the literature to determine the state-of-the-art in modeling terrestrial protected areas under climate change, with the aim of evaluating and detecting trends and gaps in the current approaches being employed, as well as to provide a useful overview and guidelines for future research. Results Most studies apply statistical, bioclimatic envelope models and focus primarily on plant species as compared to other taxa. Very few studies utilize a mechanistic, process-based approach and none examine biotic interactions like predation and competition. Important factors like land-use, habitat fragmentation, invasion and dispersal are rarely incorporated, restricting the informative value of the resulting predictions considerably. Conclusion The general impression that emerges is that biodiversity conservation in protected areas could benefit from the application of modern modeling approaches to a greater extent than is currently reflected in the scientific literature. It is particularly true that existing models have been underutilized in testing different management options under climate change. Based on these findings we suggest a strategic framework for more effectively incorporating the impact of climate change in models exploring the effectiveness of protected areas.}, language = {en} } @article{Seehafer1994, author = {Seehafer, Norbert}, title = {Current helicity and the turbulent electromotive force}, year = {1994}, language = {en} } @article{Meister1996, author = {Meister, Claudia-Veronika}, title = {Current fluctuations in the earth's magnetosphere caused by lower-hybrid-drift turbulence}, year = {1996}, language = {en} } @article{DiBelloHartmannMajumdaretal.2023, author = {Di Bello, Costantino and Hartmann, Alexander K. and Majumdar, Satya N. and Mori, Francesco and Rosso, Alberto and Schehr, Gregory}, title = {Current fluctuations in stochastically resetting particle systems}, series = {Physical review : E, Statistical, nonlinear and soft matter physics}, volume = {108}, journal = {Physical review : E, Statistical, nonlinear and soft matter physics}, number = {1}, publisher = {American Physical Society}, address = {College Park}, issn = {2470-0045}, doi = {10.1103/PhysRevE.108.014112}, pages = {18}, year = {2023}, abstract = {We consider a system of noninteracting particles on a line with initial positions distributed uniformly with density ? on the negative half-line. We consider two different models: (i) Each particle performs independent Brownian motion with stochastic resetting to its initial position with rate r and (ii) each particle performs run -and-tumble motion, and with rate r its position gets reset to its initial value and simultaneously its velocity gets randomized. We study the effects of resetting on the distribution P(Q, t) of the integrated particle current Q up to time t through the origin (from left to right). We study both the annealed and the quenched current distributions and in both cases, we find that resetting induces a stationary limiting distribution of the current at long times. However, we show that the approach to the stationary state of the current distribution in the annealed and the quenched cases are drastically different for both models. In the annealed case, the whole distribution P-an(Q, t) approaches its stationary limit uniformly for all Q. In contrast, the quenched distribution P-qu(Q, t) attains its stationary form for Q < Q(crit)(t), while it remains time dependent for Q > Q(crit)(t). We show that Q(crit)(t) increases linearly with t for large t. On the scale where Q <; Q(crit)(t), we show that P-qu(Q, t) has an unusual large deviation form with a rate function that has a third-order phase transition at the critical point. We have computed the associated rate functions analytically for both models. Using an importance sampling method that allows to probe probabilities as tiny as 10-14000, we were able to compute numerically this nonanalytic rate function for the resetting Brownian dynamics and found excellent agreement with our analytical prediction.}, language = {en} } @inproceedings{OPUS4-63397, title = {Current developments in Slavic linguistics - twenty years after}, series = {Potsdam linguistic investigations}, volume = {29}, booktitle = {Potsdam linguistic investigations}, editor = {Radeva-Bork, Teodora and Kosta, Peter}, publisher = {Peter Lang}, address = {Berlin}, isbn = {978-3-631-67673-8}, issn = {1862-524X}, doi = {10.3726/978-3-653-07147-4}, pages = {500}, year = {2020}, abstract = {The book offers a comprehensive overview of current research in Slavic linguistics from a theoretical and experimental perspective and from a variety of languages. The selected papers from the 11th European Conference on Formal Description of Slavic Languages (FDSL 11) that took place at the University of Potsdam in 2015, illustrate the advancement of Slavic linguistic studies and their outreach for the development of general linguistics. The guest paper by Noam Chomsky at the beginning of the book sets a clear sign in this direction and may be taken as an acknowledgement of the field.}, language = {en} } @book{OPUS4-17283, title = {Current approaches to formal slavic linguistics : contributions of the Second European Conference on Formal Description of Slavic Languages. FDSL II held at the University of Potsdam, November 20 - 22, 1997}, series = {Linguistik International}, volume = {9}, journal = {Linguistik International}, editor = {Kosta, Peter and Frasek, Jens}, publisher = {Lang}, address = {Frankfurt am Main}, isbn = {3-631-50311-3}, pages = {435 S.}, year = {2002}, abstract = {Formal Slavic Linguistics is concerned with explicit descriptions of structure and meaning of Slavic languages within a certain theoretical framework of Principles and Parameters that attempts to situate linguistic theory in the broader cognitive sciences. Many approaches in the present volume reflect this development in a rather significant way. But the book also illustrates the diversity of approaches we use in attempting to reflect the entire range of subfields within a given theoretical framework of cognitive science. Thus, the authors investigate all linguistic levels and interfaces of a large array of Slavic languages, based on current formal models in linguistics (such as Minimalist Program, Generalized Phrase Structure Grammar (GPSG), Head Driven Phrase Structure Grammar (HPSG), Lexical Functional Grammar (LFG), The Prague Generative Functional Grammar and Formal Semantics of different origins). Contents: Prosody. Phonetics. Phonology. Morphology. Word Formation. Syntax. Semantics. Lexicon. General Linguistics. Slavic Linguistics. Computational Linguistics. Language Acquisition. Patholinguistics (Disorders of Languages). Psycholinguistics. Parsing. Universal Grammar}, language = {en} } @incollection{JannBouckaert2017, author = {Jann, Werner and Bouckaert, Geert}, title = {Current and Future Trends in European Public Sector Research}, series = {Starke Kommunen - wirksame Verwaltung : Fortschritte und Fallstricke der internationalen Verwaltungs- und Kommunalforschung}, booktitle = {Starke Kommunen - wirksame Verwaltung : Fortschritte und Fallstricke der internationalen Verwaltungs- und Kommunalforschung}, editor = {Kuhlmann, Sabine and Schwab, Oliver}, publisher = {Springer VS}, address = {Wiesbaden}, isbn = {978-3-658-17134-6}, doi = {10.1007/978-3-658-17135-3_4}, publisher = {Universit{\"a}t Potsdam}, pages = {43 -- 61}, year = {2017}, abstract = {Emmanuel Kant asked three important questions which will always be with us: What can we know? What should we do? What may we hope for? These three key existentialist questions are, of course, also relevant for a reflection on the future of Public Administration: What can we know, as researchers in the field of Public Administration, about our object of public administration? What should we do as researchers and teachers to make sure we remain part of a solution and to guarantee that we are ahead of reality and its future problems? What kind of improvement (or not) may we hope for a public sector in an increasingly complex society? This chapter tries to explore some possible answers to these three important questions for our field of Public Administration. The background is our common project about 'European Perspectives for Public Administration' (EPPA), which we hope to establish as a continuous dialogue and discourse in the context of European Public Administration and the 'European Group for Public Administration' (EGPA).}, language = {en} } @article{RichterEngbertKliegl2006, author = {Richter, Eike M. and Engbert, Ralf and Kliegl, Reinhold}, title = {Current advances in SWIFT}, issn = {1389-0417}, doi = {10.1016/j.cogsys.2005.07.003}, year = {2006}, abstract = {Models of eye movement control are very useful for gaining insights into the intricate connections of different cognitive and oculomotor subsystems involved in reading. The SWIFT model (Engbert, Longtin, \& Kliegl (2002). Vision Research, 42, 621 - 636) proposed a unified mechanism to account for all types of eye movement patterns that might be observed in reading behavior. The model is based on the notion of spatially distributed, or parallel, processing of words in a sentence. We present a refined version of SWIFT introducing a letter-based approach that proposes a processing gradient in the shape of a smooth function. We show that SWIFT extents its capabilities by accounting for distributions of landing positions.}, language = {en} } @book{Komulainen1999, author = {Komulainen, Tuomas}, title = {Currency crisis theories - some explanation for the Russian case}, series = {Diskussionsbeitrag / Europ{\"a}isches Institut f{\"u}r Internationale Wirtschaftsbeziehungen, Potsdam}, volume = {58}, journal = {Diskussionsbeitrag / Europ{\"a}isches Institut f{\"u}r Internationale Wirtschaftsbeziehungen, Potsdam}, publisher = {Univ.}, address = {Potsdam}, issn = {1430-5445}, pages = {32 S. : graph. Darst.}, year = {1999}, language = {en} } @misc{LosterNaumannEhmuelleretal.2018, author = {Loster, Michael and Naumann, Felix and Ehmueller, Jan and Feldmann, Benjamin}, title = {CurEx}, series = {Proceedings of the 27th ACM International Conference on Information and Knowledge Management}, journal = {Proceedings of the 27th ACM International Conference on Information and Knowledge Management}, publisher = {Association for Computing Machinery}, address = {New York}, isbn = {978-1-4503-6014-2}, doi = {10.1145/3269206.3269229}, pages = {1883 -- 1886}, year = {2018}, abstract = {The integration of diverse structured and unstructured information sources into a unified, domain-specific knowledge base is an important task in many areas. A well-maintained knowledge base enables data analysis in complex scenarios, such as risk analysis in the financial sector or investigating large data leaks, such as the Paradise or Panama papers. Both the creation of such knowledge bases, as well as their continuous maintenance and curation involves many complex tasks and considerable manual effort. With CurEx, we present a modular system that allows structured and unstructured data sources to be integrated into a domain-specific knowledge base. In particular, we (i) enable the incremental improvement of each individual integration component; (ii) enable the selective generation of multiple knowledge graphs from the information contained in the knowledge base; and (iii) provide two distinct user interfaces tailored to the needs of data engineers and end-users respectively. The former has curation capabilities and controls the integration process, whereas the latter focuses on the exploration of the generated knowledge graph.}, language = {en} } @article{JurrmannBrigeliusFloheBoel2005, author = {Jurrmann, Nadine and Brigelius-Floh{\´e}, Regina and B{\"o}l, Gaby Fleur}, title = {Curcumin blocks interleukin-1 (IL-1) signaling by inhibiting the recruitment of the IL-1 receptor-associated kinase IRAK in murine thymoma EL-4 cells}, issn = {0022-3166}, year = {2005}, abstract = {Curcumin is a dietary compound with diverse anti-inflammatory and anticarcinogenic effects in several experimental models. A mechanism by which curcumin exerts these actions might be the direct modification of protein thiols, thereby altering the activity of the affected proteins. An early event in inflammatory signaling cascades is the recruitment of the interleukin-1 (IL-1) receptor-associated kinase (IRAK) to the IL-1 receptor (IL-1 RI) upon stimulation with IL-1. IRAK recruitment was shown recently to be inhibited by agents that modify thiols of IRAK. We asked, therefore, whether IRAK is also a target for curcumin. Curcumin indeed blocked IRAK thiols in a murine T-cell line stably overexpressing IRAK (EL-4(IRAK)), which resulted in the inhibition of IRAK recruitment to the IL-1RI and phosphorylation of IRAK and IL-1RI-associated proteins. Inhibitory effects were not reversible by thiol-reducing agents. Thus, modification by curcumin did not occur by oxidation but rather by alkylation, as is typical for electrophilic compounds reacting as Michael addition acceptors. The block in one of the earliest events in the IL-1 signaling cascade can explain the often observed inhibition of IL-1-mediated signaling steps by curcumin further downstream. Hence, thiol modification might be a crucial step in the anti-inflammatory functions of curcumin}, language = {en} } @article{JansenBuschmannWegoetal.2001, author = {Jansen, K. and Buschmann, Hans-J{\"u}rgen and Wego, A. and Dopp, D. and Mayer, C. and Holdt, Hans-Joachim and Schollmeyer, E.}, title = {Curcubit[5]uril, decamethylcururbit[5]uril and curcurbit[6]uril : synthesis, solubility and amin complex formation}, year = {2001}, abstract = {A simple way to prepare cucurbit[5]uril is described. The macrocycles of the cucurbituril type are nearly insoluble in water. The solubilities of cucurbit[5]uril, decamethylcucurbit[5]uril and cucurbit[6]uril in hydrochloric acid, formic acid and acetic acid of different concentrations have been investigated. Due to the formation of complexes between cucurbit[n]urils and protons the solubility increases in aqueous acids. The macrocyclic ligands are able to form complexes with several organic compounds. Thus, the complex formation of the cucurbituril macrocycles with different amines has beenstudied by means of calorimetric titrations. The reaction enthalpy gives noevidence of the formation of inclusion or exclusion complexes. 1H-NMR measurements show that in the case of cucurbit[5]uril and cucurbit[6]uril the organic guest compound is included within the hydrophobic cavity. Decamethylcucurbit[5]uril forms only exclusion complexes with organicamines. This was confirmed by the crystal structure of the decamethylcucurbit[5]uril-1,6- diaminohexane complex. complex formation - cucurbit[5]uril - cucurbit[6]uril - decamethylcucurbit[5]uril - solubility - synthesis}, language = {en} } @article{TaubertStangeLietal.2012, author = {Taubert, Andreas and Stange, Franziska and Li, Zhonghao and Junginger, Mathias and G{\"u}nter, Christina and Neumann, Mike and Friedrich, Alwin}, title = {CuO nanoparticles from the Strongly Hydrated Ionic Liquid Precursor (ILP) Tetrabutylammonium Hydroxide evaluation of the Ethanol Sensing Activity}, series = {ACS applied materials \& interfaces}, volume = {4}, journal = {ACS applied materials \& interfaces}, number = {2}, publisher = {American Chemical Society}, address = {Washington}, issn = {1944-8244}, doi = {10.1021/am201427q}, pages = {791 -- 795}, year = {2012}, abstract = {The sensing potential of CuO nanoparticles synthesized via. precipitation from a water/ionic liquid precursor (ILP) mixture was investigated. The particles have a moderate surface area of 66 m(2)/g after synthesis, which decreases upon thermal treatment to below 5 m(2)/g. Transmission electron microscopy confirms crystal growth upon annealing, likely due to sintering effects. The as-synthesized particles can be used for ethanol sensing. The respective sensors show fast response and recovery times of below 10 s and responses greater than 2.3 at 100 ppm of ethanol at 200 degrees C, which is higher than any CuO-based ethanol sensor described so far.}, language = {en} } @book{Baumgaertel1999, author = {Baumg{\"a}rtel, Hellmut}, title = {Cuntz algebras and superselection structures in Quantum Field Theory}, series = {LQP Papers / Local Quantum Physics Crossroads}, journal = {LQP Papers / Local Quantum Physics Crossroads}, publisher = {Univ.}, address = {G{\"o}ttingen}, year = {1999}, language = {en} } @article{Kunst1997, author = {Kunst, Christiane}, title = {Cunobellin}, year = {1997}, language = {de} }