@article{HayerdeHalleuxKoehleretal.2006, author = {Hayer, Anna and de Halleux, Veronique and K{\"o}hler, Anna and El-Garoughy, Abdel and Meijer, E. W. and Barbera, Joaquin and Tant, Julien and Levin, Jeremy and Lehmann, Matthias and Gierschner, Johannes and Cornil, Jerome and Geerts, Yves Henri}, title = {Highly fluorescent crystalline and liquid crystalline columnar phases of pyrene-based structures}, issn = {1520-6106}, doi = {10.1021/Jp0573689}, year = {2006}, abstract = {A concept for highly ordered solid-state structures with bright fluorescence is proposed: liquid crystals based on tetraethynylpyrene chromophores, where the rigid core is functionalized with flexible, promesogenic alkoxy chains. The synthesis of this novel material is presented. The therniotropic properties are studied by means of differential scanning calorimetry (DSC), cross-polarized optical microscopy (POM), and X-ray diffraction. The mesogen possesses an enantiotropic Col(h) phase over a large temperature range before clearing. The material is highly fluorescent in solution and, most remarkably, in the condensed state, with a broad, strongly red shifted emission. Fluorescence quantum yields (Phi(F)) have been determined to be 70\% in dichloromethane solution and 62\% in the solid state. Concentration- and temperature-dependent absorption and emission studies as well as quantum-chemical calculations on isolated molecules and dimers are used to clarify the type of intermolecular interactions present as well as their influence on the fluorescence quantum yield and spectral properties of the material. The high luminescence efficiency in the solid state is ascribed to rotated chromophores, leading to an optically allowed lowest optical transition}, language = {en} } @article{GriessnerBroekerLehmannetal.2009, author = {Grießner, Matthias and Broeker, Patrick and Lehmann, Andr{\´e} and Ehrentreich-F{\"o}rster, Eva and Bier, Frank Fabian}, title = {Detection of angiotensin II type 1 receptor ligands by a cell-based assay}, issn = {1618-2642}, doi = {10.1007/s00216-009-3074-4}, year = {2009}, abstract = {This work describes a cell-based assay that does not depend on radioactivity or laboratory animals for the detection of ligands of angiotensin II type 1 receptor (AT(1)R). The assay makes use of stable transfected Chinese hamster ovary cells (CHO-AT(1)R) expressing the AT(1)R. A sequential saturation assay principle was used in which receptor binding sites of the CHO-AT(1)R cells are blocked by the analyte in a concentration-dependent manner. Afterwards, TAMRA-angiotensin II, a fluorescence-labeled ligand, was added to bind to the remaining free binding sites of the receptor. In consequence, the fluorescence signal determined is inversely proportional to the concentration of the analyte.}, language = {en} } @misc{ZimmermannSchuenzelSafoklovetal.2020, author = {Zimmermann, Matthias and Sch{\"u}nzel, Julia and Safoklov, Yury and Lehmann, Louise and Eilebrecht, Johanna and G{\"o}lz, Leah and Stegemann, Tim and Wagner, Marlene and Klimke, Romy and Steinbach, Peter}, title = {MenschenRechtsMagazin : Informationen | Meinungen | Analysen}, volume = {25}, number = {2}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, organization = {MenschenRechtsZentrum der Universit{\"a}t Potsdam}, issn = {1434-2820}, doi = {10.25932/publishup-47400}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-474009}, pages = {77 -- 167}, year = {2020}, abstract = {Aus dem Inhalt: • Gemeinschaftliches Eigentum indigener V{\"o}lker - Recht und Rechtsdurchsetzung am Fall Lhaka Honhat gegen Argentinien • „Spiel mir das Lied vom Tod": Die Pflichten des Staates beim Umgang mit freiverantwortlicher Lebensbeendigung - Eine Untersuchung unter Ber{\"u}cksichtigung der deutschen und europ{\"a}ischen h{\"o}chstrichterlichen Rechtsprechung • Die Individualbeschwerde vor dem Kinderrechtsausschuss der Vereinten Nationen: Ein Instrument zur effektiven Durchsetzung der Kinderrechte?}, language = {de} } @article{LehmannZhengRyoetal.2020, author = {Lehmann, Anika and Zheng, Weishuang and Ryo, Masahiro and Soutschek, Katharina and Roy, Julien and Rongstock, Rebecca and Maaß, Stefanie and Rillig, Matthias C.}, title = {Fungal traits important for soil aggregation}, series = {Frontiers in microbiology}, volume = {10}, journal = {Frontiers in microbiology}, publisher = {Frontiers Media}, address = {Lausanne}, issn = {1664-302X}, doi = {10.3389/fmicb.2019.02904}, pages = {13}, year = {2020}, abstract = {Soil structure, the complex arrangement of soil into aggregates and pore spaces, is a key feature of soils and soil biota. Among them, filamentous saprobic fungi have well-documented effects on soil aggregation. However, it is unclear what properties, or traits, determine the overall positive effect of fungi on soil aggregation. To achieve progress, it would be helpful to systematically investigate a broad suite of fungal species for their trait expression and the relation of these traits to soil aggregation. Here, we apply a trait-based approach to a set of 15 traits measured under standardized conditions on 31 fungal strains including Ascomycota, Basidiomycota, and Mucoromycota, all isolated from the same soil. We find large differences among these fungi in their ability to aggregate soil, including neutral to positive effects, and we document large differences in trait expression among strains. We identify biomass density, i.e., the density with which a mycelium grows (positive effects), leucine aminopeptidase activity (negative effects) and phylogeny as important factors explaining differences in soil aggregate formation (SAF) among fungal strains; importantly, growth rate was not among the important traits. Our results point to a typical suite of traits characterizing fungi that are good soil aggregators, and our findings illustrate the power of employing a trait-based approach to unravel biological mechanisms underpinning soil aggregation. Such an approach could now be extended also to other soil biota groups. In an applied context of restoration and agriculture, such trait information can inform management, for example to prioritize practices that favor the expression of more desirable fungal traits.}, language = {en} } @article{MaassDaphiLehmannetal.2017, author = {Maass, Stefanie and Daphi, Daniel and Lehmann, Anika and Rillig, Matthias C.}, title = {Transport of microplastics by two collembolan species}, series = {Environmental pollution}, volume = {225}, journal = {Environmental pollution}, publisher = {Elsevier}, address = {Oxford}, issn = {0269-7491}, doi = {10.1016/j.envpol.2017.03.009}, pages = {456 -- 459}, year = {2017}, abstract = {Plastics, despite their great benefits, have become a ubiquitous environmental pollutant, with micro-plastic particles having come into focus most recently. Microplastic effects have been intensely studied in aquatic, especially marine systems; however, there is lack of studies focusing on effects on soil and its biota. A basic question is if and how surface-deposited microplastic particles are transported into the soil. We here wished to test if soil microarthropods, using Collembola, can transport these particles over distances of centimeters within days in a highly controlled experimental set-up. We conducted a fully factorial experiment with two collembolan species of differing body size, Folsomia candida and Proisotoma minuta, in combination with urea-formaldehyde particles of two different particle sizes. We observed significant differences between the species concerning the distance the particles were transported. F. candida was able to transport larger particles further and faster than P. minuta. Using video, we observed F candida interacting with urea-formaldehyde particles and polyethylene terephthalate fibers, showing translocation of both material types. Our data clearly show that microplastic particles can be moved and distributed by soil microarthropods. Although we did not observe feeding, it is possible that microarthropods contribute to the accumulation of microplastics in the soil food web. (C) 2017 Elsevier Ltd. All rights reserved.}, language = {en} } @article{KrokeSchmidtAminietal.2022, author = {Kroke, Anja and Schmidt, Annemarie and Amini, Anna M. and Kalotai, Nicole and Lehmann, Andreas and Haardt, Julia and Bauer, J{\"u}rgen M. and Bischoff-Ferrari, Heike A. and Boeing, Heiner and Egert, Sarah and Ellinger, Sabine and K{\"u}hn, Tilman and Louis, Sandrine and Lorkowski, Stefan and Nimptsch, Katharina and Remer, Thomas and Schulze, Matthias B. and Siener, Roswitha and Stangl, Gabriele and Volkert, Dorothee and Zittermann, Armin and Buyken, Anette E. and Watzl, Bernhard and Schwingshackl, Lukas}, title = {Dietary protein intake and health-related outcomes: a methodological protocol for the evidence evaluation and the outline of an evidence to decision framework underlying the evidence-based guideline of the German Nutrition Society}, series = {European journal of nutrition}, volume = {61}, journal = {European journal of nutrition}, number = {4}, publisher = {Springer Nature}, address = {Heidelberg}, organization = {German Nutr Soc}, issn = {1436-6207}, doi = {10.1007/s00394-021-02789-5}, pages = {2091 -- 2101}, year = {2022}, abstract = {Purpose: The present work aimed to delineate (i) a revised protocol according to recent methodological developments in evidence generation, to (ii) describe its interpretation, the assessment of the overall certainty of evidence and to (iii) outline an Evidence to Decision framework for deriving an evidence-based guideline on quantitative and qualitative aspects of dietary protein intake. Methods A methodological protocol to systematically investigate the association between dietary protein intake and several health outcomes and for deriving dietary protein intake recommendations for the primary prevention of various non-communicable diseases in the general adult population was developed. Results The developed methodological protocol relies on umbrella reviews including systematic reviews with or without meta-analyses. Systematic literature searches in three databases will be performed for each health-related outcome. The methodological quality of all selected systematic reviews will be evaluated using a modified version of AMSTAR 2, and the outcome-specific certainty of evidence for systematic reviews with or without meta-analysis will be assessed with NutriGrade. The general outline of the Evidence to Decision framework foresees that recommendations in the derived guideline will be given based on the overall certainty of evidence as well as on additional criteria such as sustainability. Conclusion The methodological protocol permits a systematic evaluation of published systematic reviews on dietary protein intake and its association with selected health-related outcomes. An Evidence to Decision framework will be the basis for the overall conclusions and the resulting recommendations for dietary protein intake.}, language = {en} }