TY  - JOUR
A1  - Dengler, Jürgen
A1  - Wagner, Viktoria
A1  - Dembicz, Iwona
A1  - Garcia-Mijangos, Itziar
A1  - Naqinezhad, Alireza
A1  - Boch, Steffen
A1  - Chiarucci, Alessandro
A1  - Conradi, Timo
A1  - Filibeck, Goffredo
A1  - Guarino, Riccardo
A1  - Janisova, Monika
A1  - Steinbauer, Manuel J.
A1  - Acic, Svetlana
A1  - Acosta, Alicia T. R.
A1  - Akasaka, Munemitsu
A1  - Allers, Marc-Andre
A1  - Apostolova, Iva
A1  - Axmanova, Irena
A1  - Bakan, Branko
A1  - Baranova, Alina
A1  - Bardy-Durchhalter, Manfred
A1  - Bartha, Sandor
A1  - Baumann, Esther
A1  - Becker, Thomas
A1  - Becker, Ute
A1  - Belonovskaya, Elena
A1  - Bengtsson, Karin
A1  - Benito Alonso, Jose Luis
A1  - Berastegi, Asun
A1  - Bergamini, Ariel
A1  - Bonini, Ilaria
A1  - Bruun, Hans Henrik
A1  - Budzhak, Vasyl
A1  - Bueno, Alvaro
A1  - Antonio Campos, Juan
A1  - Cancellieri, Laura
A1  - Carboni, Marta
A1  - Chocarro, Cristina
A1  - Conti, Luisa
A1  - Czarniecka-Wiera, Marta
A1  - De Frenne, Pieter
A1  - Deak, Balazs
A1  - Didukh, Yakiv P.
A1  - Diekmann, Martin
A1  - Dolnik, Christian
A1  - Dupre, Cecilia
A1  - Ecker, Klaus
A1  - Ermakov, Nikolai
A1  - Erschbamer, Brigitta
A1  - Escudero, Adrian
A1  - Etayo, Javier
A1  - Fajmonova, Zuzana
A1  - Felde, Vivian A.
A1  - Fernandez Calzado, Maria Rosa
A1  - Finckh, Manfred
A1  - Fotiadis, Georgios
A1  - Fracchiolla, Mariano
A1  - Ganeva, Anna
A1  - Garcia-Magro, Daniel
A1  - Gavilan, Rosario G.
A1  - Germany, Markus
A1  - Giladi, Itamar
A1  - Gillet, Francois
A1  - Giusso del Galdo, Gian Pietro
A1  - Gonzalez, Jose M.
A1  - Grytnes, John-Arvid
A1  - Hajek, Michal
A1  - Hajkova, Petra
A1  - Helm, Aveliina
A1  - Herrera, Mercedes
A1  - Hettenbergerova, Eva
A1  - Hobohm, Carsten
A1  - Huellbusch, Elisabeth M.
A1  - Ingerpuu, Nele
A1  - Jandt, Ute
A1  - Jeltsch, Florian
A1  - Jensen, Kai
A1  - Jentsch, Anke
A1  - Jeschke, Michael
A1  - Jimenez-Alfaro, Borja
A1  - Kacki, Zygmunt
A1  - Kakinuma, Kaoru
A1  - Kapfer, Jutta
A1  - Kavgaci, Ali
A1  - Kelemen, Andras
A1  - Kiehl, Kathrin
A1  - Koyama, Asuka
A1  - Koyanagi, Tomoyo F.
A1  - Kozub, Lukasz
A1  - Kuzemko, Anna
A1  - Kyrkjeeide, Magni Olsen
A1  - Landi, Sara
A1  - Langer, Nancy
A1  - Lastrucci, Lorenzo
A1  - Lazzaro, Lorenzo
A1  - Lelli, Chiara
A1  - Leps, Jan
A1  - Loebel, Swantje
A1  - Luzuriaga, Arantzazu L.
A1  - Maccherini, Simona
A1  - Magnes, Martin
A1  - Malicki, Marek
A1  - Marceno, Corrado
A1  - Mardari, Constantin
A1  - Mauchamp, Leslie
A1  - May, Felix
A1  - Michelsen, Ottar
A1  - Mesa, Joaquin Molero
A1  - Molnar, Zsolt
A1  - Moysiyenko, Ivan Y.
A1  - Nakaga, Yuko K.
A1  - Natcheva, Rayna
A1  - Noroozi, Jalil
A1  - Pakeman, Robin J.
A1  - Palpurina, Salza
A1  - Partel, Meelis
A1  - Paetsch, Ricarda
A1  - Pauli, Harald
A1  - Pedashenko, Hristo
A1  - Peet, Robert K.
A1  - Pielech, Remigiusz
A1  - Pipenbaher, Natasa
A1  - Pirini, Chrisoula
A1  - Pleskova, Zuzana
A1  - Polyakova, Mariya A.
A1  - Prentice, Honor C.
A1  - Reinecke, Jennifer
A1  - Reitalu, Triin
A1  - Pilar Rodriguez-Rojo, Maria
A1  - Rolecek, Jan
A1  - Ronkin, Vladimir
A1  - Rosati, Leonardo
A1  - Rosen, Ejvind
A1  - Ruprecht, Eszter
A1  - Rusina, Solvita
A1  - Sabovljevic, Marko
A1  - Maria Sanchez, Ana
A1  - Savchenko, Galina
A1  - Schuhmacher, Oliver
A1  - Skornik, Sonja
A1  - Sperandii, Marta Gaia
A1  - Staniaszek-Kik, Monika
A1  - Stevanovic-Dajic, Zora
A1  - Stock, Marin
A1  - Suchrow, Sigrid
A1  - Sutcliffe, Laura M. E.
A1  - Swacha, Grzegorz
A1  - Sykes, Martin
A1  - Szabo, Anna
A1  - Talebi, Amir
A1  - Tanase, Catalin
A1  - Terzi, Massimo
A1  - Tolgyesi, Csaba
A1  - Torca, Marta
A1  - Torok, Peter
A1  - Tothmeresz, Bela
A1  - Tsarevskaya, Nadezda
A1  - Tsiripidis, Ioannis
A1  - Tzonev, Rossen
A1  - Ushimaru, Atushi
A1  - Valko, Orsolya
A1  - van der Maarel, Eddy
A1  - Vanneste, Thomas
A1  - Vashenyak, Iuliia
A1  - Vassilev, Kiril
A1  - Viciani, Daniele
A1  - Villar, Luis
A1  - Virtanen, Risto
A1  - Kosic, Ivana Vitasovic
A1  - Wang, Yun
A1  - Weiser, Frank
A1  - Went, Julia
A1  - Wesche, Karsten
A1  - White, Hannah
A1  - Winkler, Manuela
A1  - Zaniewski, Piotr T.
A1  - Zhang, Hui
A1  - Ziv, Yaron
A1  - Znamenskiy, Sergey
A1  - Biurrun, Idoia
T1  - GrassPlot - a database of multi-scale plant diversity in Palaearctic grasslands
JF  - Phytocoenologia
N2  - GrassPlot is a collaborative vegetation-plot database organised by the Eurasian Dry Grassland Group (EDGG) and listed in the Global Index of Vegetation-Plot Databases (GIVD ID EU-00-003). GrassPlot collects plot records (releves) from grasslands and other open habitats of the Palaearctic biogeographic realm. It focuses on precisely delimited plots of eight standard grain sizes (0.0001; 0.001;... 1,000 m(2)) and on nested-plot series with at least four different grain sizes. The usage of GrassPlot is regulated through Bylaws that intend to balance the interests of data contributors and data users. The current version (v. 1.00) contains data for approximately 170,000 plots of different sizes and 2,800 nested-plot series. The key components are richness data and metadata. However, most included datasets also encompass compositional data. About 14,000 plots have near-complete records of terricolous bryophytes and lichens in addition to vascular plants. At present, GrassPlot contains data from 36 countries throughout the Palaearctic, spread across elevational gradients and major grassland types. GrassPlot with its multi-scale and multi-taxon focus complements the larger international vegetationplot databases, such as the European Vegetation Archive (EVA) and the global database " sPlot". Its main aim is to facilitate studies on the scale-and taxon-dependency of biodiversity patterns and drivers along macroecological gradients. GrassPlot is a dynamic database and will expand through new data collection coordinated by the elected Governing Board. We invite researchers with suitable data to join GrassPlot. Researchers with project ideas addressable with GrassPlot data are welcome to submit proposals to the Governing Board.
KW  - biodiversity
KW  - European Vegetation Archive (EVA)
KW  - Eurasian Dry Grassland Group (EDGG)
KW  - grassland vegetation
KW  - GrassPlot
KW  - macroecology
KW  - multi-taxon
KW  - nested plot
KW  - scale-dependence
KW  - species-area relationship (SAR)
KW  - sPlot
KW  - vegetation-plot database
Y1  - 2018
U6  - https://doi.org/10.1127/phyto/2018/0267
SN  - 0340-269X
VL  - 48
IS  - 3
SP  - 331
EP  - 347
PB  - Cramer
CY  - Stuttgart
ER  - 
TY  - GEN
A1  - Abramowski, Attila
A1  - Aharonian, Felix A.
A1  - Benkhali, Faical Ait
A1  - Akhperjanian, A. G.
A1  - Angüner, Ekrem Oǧuzhan
A1  - Backes, Michael
A1  - Balenderan, Shangkari
A1  - Balzer, Arnim
A1  - Barnacka, Anna
A1  - Becherini, Yvonne
A1  - Tjus, Julia Becker
A1  - Berge, David
A1  - Bernhard, Sabrina
A1  - Bernlöhr, Konrad
A1  - Birsin, E.
A1  - Biteau, Jonathan
A1  - Böttcher, Markus
A1  - Boisson, Catherine
A1  - Bolmont, J.
A1  - Bordas, Pol
A1  - Bregeon, Johan
A1  - Brun, Francois
A1  - Brun, Pierre
A1  - Bryan, Mark
A1  - Bulik, Tomasz
A1  - Carrigan, Svenja
A1  - Casanova, Sabrina
A1  - Chadwick, Paula M.
A1  - Chakraborty, Nachiketa
A1  - Chalme-Calvet, R.
A1  - Chaves, Ryan C. G.
A1  - Chretien, M.
A1  - Colafrancesco, Sergio
A1  - Cologna, Gabriele
A1  - Conrad, Jan
A1  - Couturier, Claire
A1  - Cui, Yudong
A1  - Davids, Isak Delberth
A1  - Degrange, Bernhard
A1  - Deil, Christoph
A1  - deWilt, P.
A1  - Djannati-Ataï, A.
A1  - Domainko, Wilfried
A1  - Donath, Axel
A1  - Dubus, G.
A1  - Dutson, K.
A1  - Dyks, J.
A1  - Dyrda, M.
A1  - Edwards, Tanya
A1  - Egberts, Kathrin
A1  - Eger, Peter
A1  - Espigat, P.
A1  - Farnier, C.
A1  - Fegan, Stephen
A1  - Feinstein, Fabrice
A1  - Fernandes, Milton Virgilio
A1  - Fernandez, Diane
A1  - Fiasson, A.
A1  - Fontaine, Gerard
A1  - Förster, Andreas
A1  - Fuessling, M.
A1  - Gabici, S.
A1  - Gajdus, M.
A1  - Gallant, Yves A.
A1  - Garrigoux, Tania
A1  - Giavitto, G.
A1  - Giebels, Berrie
A1  - Glicenstein, Jean-Francois
A1  - Gottschall, Daniel
A1  - Grondin, M. -H.
A1  - Grudzinska, M.
A1  - Hadasch, Daniela
A1  - Haeffner, S.
A1  - Hahn, Joachim
A1  - Harris, Jonathan
A1  - Heinzelmann, Götz
A1  - Henri, G.
A1  - Hermann, German
A1  - Hervet, O.
A1  - Hillert, Andreas
A1  - Hinton, James Anthony
A1  - Hofmann, Werner
A1  - Hofverberg, Petter
A1  - Holler, Markus
A1  - Horns, Dieter
A1  - Ivascenko, Alex
A1  - Jacholkowska, A.
A1  - Jahn, C.
A1  - Jamrozy, Marek
A1  - Janiak, M.
A1  - Jankowsky, F.
A1  - Jung-Richardt, I.
A1  - Kastendieck, Max Anton
A1  - Katarzynski, K.
A1  - Katz, U.
A1  - Kaufmann, S.
A1  - Khelifi, B.
A1  - Kieffer, Michel
A1  - Klepser, S.
A1  - Klochkov, Dmitry
A1  - Kluzniak, W.
A1  - Kolitzus, David
A1  - Komin, Nu
A1  - Kosack, Karl
A1  - Krakau, Steffen
A1  - Krayzel, F.
A1  - Krueger, Pat P.
A1  - Laffon, H.
A1  - Lamanna, G.
A1  - Lefaucheur, J.
A1  - Lefranc, Valentin
A1  - Lemiere, A.
A1  - Lemoine-Goumard, M.
A1  - Lenain, J. -P.
A1  - Lohse, Thomas
A1  - Lopatin, A.
A1  - Lu, Chia-Chun
A1  - Marandon, Vincent
A1  - Marcowith, Alexandre
A1  - Marx, Ramin
A1  - Maurin, G.
A1  - Maxted, Nigel
A1  - Mayer, Michael
A1  - McComb, T. J. Lowry
A1  - Mehault, J.
A1  - Meintjes, P. J.
A1  - Menzler, Ulf
A1  - Meyer, M.
A1  - Mitchell, Alison M. W.
A1  - Moderski, R.
A1  - Mohamed, M.
A1  - Mora, K.
A1  - Moulin, Emmanuel
A1  - Murach, Thomas
A1  - de Naurois, Mathieu
A1  - Niemiec, J.
A1  - Nolan, Sam J.
A1  - Oakes, Louise
A1  - Odaka, Hirokazu
A1  - Ohm, S.
A1  - Optiz, Björn
A1  - Ostrowski, Michal
A1  - Oya, I.
A1  - Panter, Michael
A1  - Parsons, R. Daniel
A1  - Arribas, M. Paz
A1  - Pekeur, Nikki W.
A1  - Pelletier, G.
A1  - Petrucci, P. -O.
A1  - Peyaud, B.
A1  - Pita, S.
A1  - Poon, Helen
A1  - Pühlhofer, Gerd
A1  - Punch, M.
A1  - Quirrenbach, A.
A1  - Raab, S.
A1  - Reichardt, I.
A1  - Reimer, Anita
A1  - Reimer, Olaf
A1  - Renaud, Metz
A1  - de los Reyes, Raquel
A1  - Rieger, Frank
A1  - Romoli, C.
A1  - Rosier-Lees, S.
A1  - Rowell, G.
A1  - Rudak, B.
A1  - Rulten, C. B.
A1  - Sahakian, Vardan
A1  - Salek, D.
A1  - Sanchez, David M.
A1  - Santangelo, Andrea
A1  - Schlickeiser, Reinhard
A1  - Schuessler, F.
A1  - Schulz, A.
A1  - Schwanke, Ullrich
A1  - Schwarzburg, S.
A1  - Schwemmer, S.
A1  - Sol, H.
A1  - Spanier, Felix
A1  - Spengler, G.
A1  - Spies, Franziska
A1  - Stawarz, Lukasz
A1  - Steenkamp, Riaan
A1  - Stegmann, Christian
A1  - Stinzing, F.
A1  - Stycz, K.
A1  - Sushch, Iurii
A1  - Tavernet, J. -P.
A1  - Tavernier, T.
A1  - Taylor, A. M.
A1  - Terrier, R.
A1  - Tluczykont, Martin
A1  - Trichard, C.
A1  - Valerius, K.
A1  - van Eldik, C.
A1  - van Soelen, B.
A1  - Vasileiadis, Georges
A1  - Veh, J.
A1  - Venter, Christo
A1  - Viana, Aion
A1  - Vincent, P.
A1  - Vink, Jacco
A1  - Völk, Heinrich J.
A1  - Volpe, Francesca
A1  - Vorster, Martine
A1  - Vuillaume, T.
A1  - Wagner, S. J.
A1  - Wagner, P.
A1  - Wagner, R. M.
A1  - Ward, Martin
A1  - Weidinger, Matthias
A1  - Weitzel, Quirin
A1  - White, R.
A1  - Wierzcholska, A.
A1  - Willmann, P.
A1  - Woernlein, A.
A1  - Wouters, D.
A1  - Yang, Ruizhi
A1  - Zabalza, Victor
A1  - Zaborov, Dmitry
A1  - Zacharias, M.
A1  - Zdziarski, A. A.
A1  - Zech, Alraune
A1  - Zechlin, Hannes -S.
T1  - H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud (vol 574, A100, 2015)
T2  - Astronomy and astrophysics : an international weekly journal
KW  - gamma rays: general
KW  - ISM: supernova remnants
KW  - ISM: clouds
KW  - errata, addenda
Y1  - 2015
U6  - https://doi.org/10.1051/0004-6361/201425070e
SN  - 1432-0746
VL  - 580
PB  - EDP Sciences
CY  - Les Ulis
ER  - 
TY  - CHAP
A1  - Curzon, Paul
A1  - Kalas, Ivan
A1  - Schubert, Sigrid
A1  - Schaper, Niclas
A1  - Barnes, Jan
A1  - Kennewell, Steve
A1  - Bröker, Kathrin
A1  - Kastens, Uwe
A1  - Magenheim, Johannes
A1  - Dagiene, Valentina
A1  - Stupuriene, Gabriele
A1  - Ellis, Jason Brent
A1  - Abreu-Ellis, Carla Reis
A1  - Grillenberger, Andreas
A1  - Romeike, Ralf
A1  - Haugsbakken, Halvdan
A1  - Jones, Anthony
A1  - Lewin, Cathy
A1  - McNicol, Sarah
A1  - Nelles, Wolfgang
A1  - Neugebauer, Jonas
A1  - Ohrndorf, Laura
A1  - Schaper, Niclas
A1  - Schubert, Sigrid
A1  - Opel, Simone
A1  - Kramer, Matthias
A1  - Trommen, Michael
A1  - Pottbäcker, Florian
A1  - Ilaghef, Youssef
A1  - Passig, David
A1  - Tzuriel, David
A1  - Kedmi, Ganit Eshel
A1  - Saito, Toshinori
A1  - Webb, Mary
A1  - Weigend, Michael
A1  - Bottino, Rosa
A1  - Chioccariello, Augusto
A1  - Christensen, Rhonda
A1  - Knezek, Gerald
A1  - Gioko, Anthony Maina
A1  - Angondi, Enos Kiforo
A1  - Waga, Rosemary
A1  - Ohrndorf, Laura
A1  - Or-Bach, Rachel
A1  - Preston, Christina
A1  - Younie, Sarah
A1  - Przybylla, Mareen
A1  - Romeike, Ralf
A1  - Reynolds, Nicholas
A1  - Swainston, Andrew
A1  - Bendrups, Faye
A1  - Sysło, Maciej M.
A1  - Kwiatkowska, Anna Beata
A1  - Zieris, Holger
A1  - Gerstberger, Herbert
A1  - Müller, Wolfgang
A1  - Büchner, Steffen
A1  - Opel, Simone
A1  - Schiller, Thomas
A1  - Wegner, Christian
A1  - Zender, Raphael
A1  - Lucke, Ulrike
A1  - Diethelm, Ira
A1  - Syrbe, Jörn
A1  - Lai, Kwok-Wing
A1  - Davis, Niki
A1  - Eickelmann, Birgit
A1  - Erstad, Ola
A1  - Fisser, Petra
A1  - Gibson, David
A1  - Khaddage, Ferial
A1  - Knezek, Gerald
A1  - Micheuz, Peter
A1  - Kloos, Carlos Delgado
ED  - Brinda, Torsten
ED  - Reynolds, Nicholas
ED  - Romeike, Ralf
ED  - Schwill, Andreas
T1  - KEYCIT 2014
BT  - key competencies in informatics and ICT
N2  - In our rapidly changing world it is increasingly important not only to be an expert in a chosen field of study but also to be able to respond to developments, master new approaches to solving problems, and fulfil changing requirements in the modern world and in the job market. In response to these needs key competencies in understanding, developing and using new digital technologies are being brought into focus in school and university programmes. The IFIP TC3 conference "KEYCIT – Key Competences in Informatics and ICT (KEYCIT 2014)" was held at the University of Potsdam in Germany from July 1st to 4th, 2014 and addressed the combination of key competencies, Informatics and ICT in detail. The conference was organized into strands focusing on secondary education, university education and teacher education (organized by IFIP WGs 3.1 and 3.3) and provided a forum to present and to discuss research, case studies, positions, and national perspectives in this field.
T3  - Commentarii informaticae didacticae (CID) - 7 
KW  - Schlüsselkompetenzen
KW  - Informatik
KW  - Bildung
KW  - ICT
KW  - Informatikdidaktik
KW  - Key Competencies
KW  - Informatics
KW  - education
KW  - ICT
KW  - Computer Science Education
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-70325
SN  - 978-3-86956-292-6
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Hilson, Pierre
A1  - Allemeersch, Joke
A1  - Altmann, Thomas
A1  - Aubourg, Sebastien
A1  - Avon, Alexandra
A1  - Beynon, Jim
A1  - Bhalerao, Rishikesh P.
A1  - Bitton, Frederique
A1  - Caboche, Michel
A1  - Cannoot, Bernard
A1  - Chardakov, Vasil
A1  - Cognet-Holliger, Cecile
A1  - Colot, Vincent
A1  - Crowe, Mark
A1  - Darimont, Caroline
A1  - Durinck, Steffen
A1  - Eickhoff, Holger
A1  - deLongevialle, Andeol Falcon
A1  - Farmer, Edward E.
A1  - Grant, Murray
A1  - Kuiper, Martin T. R.
A1  - Lehrach, Hans
A1  - Leon, Celine
A1  - Leyva, Antonio
A1  - Lundeberg, Joakim
A1  - Lurin, Claire
A1  - Moreau, Yves
T1  - Versatile gene-specific sequence tags for arabidopsis functional genomics : transcript profiling and reserve genetics applications
N2  - Microarray transcript profiling and RNA interference are two new technologies crucial for large-scale gene function studies in multicellular eukaryotes. Both rely on sequence-specific hybridization between complementary nucleic acid strands, inciting us to create a collection of gene-specific sequence tags (GSTs) representing at least 21,500 Arabidopsis genes and which are compatible with both approaches. The GSTs were carefully selected to ensure that each of them shared no significant similarity with any other region in the Arabidopsis genome. They were synthesized by PCR amplification from genomic DNA. Spotted microarrays fabricated from the GSTs show good dynamic range, specificity, and sensitivity in transcript profiling experiments. The GSTs have also been transferred to bacterial plasmid vectors via recombinational cloning protocols. These cloned GSTs constitute the ideal starting point for a variety of functional approaches, including reverse genetics. We have subcloned GSTs on a large scale into vectors designed for gene silencing in plant cells. We show that in planta expression of GST hairpin RNA results in the expected phenotypes in silenced Arabidopsis lines. These versatile GST resources provide novel and powerful tools for functional genomics
Y1  - 2004
ER  - 
TY  - BOOK
A1  - Görne, Thomas
A1  - Bergweiler, Steffen
T1  - Monitoring Lautsprecher in Studio- und HiFi-Technik : von der Aktivbox bis zur Surround-Abhöre Technik, Akustik, Aufstellung
Y1  - 2004
SN  - 3-932275-51-9
PB  - PPV-Medien
CY  - Bergkirchen
ER  - 
TY  - GEN
A1  - Hayn, Michael
A1  - Beirle, Steffen
A1  - Hamprecht, Fred A.
A1  - Platt, Ulrich
A1  - Menze, Björn H.
A1  - Wagner, Thomas
T1  - Analysing spatio-temporal patterns of the global NO2-distribution retrieved from GOME satellite observations using a generalized additive model
N2  - With the increasing availability of observational data from different sources at a global level, joint analysis of these data is becoming especially attractive. For such an analysis – oftentimes with little prior knowledge about local and global interactions between the different observational variables at hand – an exploratory, data-driven analysis of the data may be of particular relevance. In the present work we used generalized additive models (GAM) in an exemplary study of spatio-temporal patterns in the tropospheric NO2-distribution derived from GOME satellite observations (1996 to 2001) at global scale. We focused on identifying correlations between NO2 and local wind fields, a quantity which is of particular interest in the analysis of spatio-temporal interactions. Formulating general functional, parametric relationships between the observed NO2 distribution and local wind fields, however, is difficult – if not impossible. So, rather than following a modelbased analysis testing the data for predefined hypotheses (assuming, for example, sinusoidal seasonal trends), we used a GAM with non-parametric model terms to learn this functional relationship between NO2 and wind directly from the data. The NO2 observations showed to be affected by winddominated processes over large areas. We estimated the extent of areas affected by specific NO2 emission sources, and were able to highlight likely atmospheric transport “pathways”. General temporal trends which were also part of our model – weekly, seasonal and linear changes – showed to be in good agreement with previous studies and alternative ways of analysing the time series. Overall, using a non-parametric model provided favorable means for a rapid inspection of this large spatio-temporal NO2 data set, with less bias than parametric approaches, and allowing to visualize dynamical processes of the NO2 distribution at a global scale.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 131 
KW  - Tropospheric nitrogen-dioxide
KW  - Air-pollution
KW  - Anthropogenic sources
KW  - NO2
KW  - Validation
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-44999
ER  - 
TY  - JOUR
A1  - Simons, Nadja K.
A1  - Lewinsohn, Thomas
A1  - Bluethgen, Nico
A1  - Buscot, Francois
A1  - Boch, Steffen
A1  - Daniel, Rolf
A1  - Gossner, Martin M.
A1  - Jung, Kirsten
A1  - Kaiser, Kristin
A1  - Müller, Jörg
A1  - Prati, Daniel
A1  - Renner, Swen C.
A1  - Socher, Stephanie A.
A1  - Sonnemann, Ilja
A1  - Weiner, Christiane N.
A1  - Werner, Michael
A1  - Wubet, Tesfaye
A1  - Wurst, Susanne
A1  - Weisser, Wolfgang W.
T1  - Contrasting effects of grassland management modes on species-abundance distributions of multiple groups
JF  - Agriculture, ecosystems & environment : an international journal for scientific research on the relationship of agriculture and food production to the biosphere
N2  - Intensive land use is a major cause of biodiversity loss, but most studies comparing the response of multiple taxa rely on simple diversity measures while analyses of other community attributes are only recently gaining attention. Species-abundance distributions (SADs) are a community attribute that can be used to study changes in the overall abundance structure of species groups, and whether these changes are driven by abundant or rare species. We evaluated the effect of grassland management intensity for three land-use modes (fertilization, mowing, grazing) and their combination on species richness and SADs for three belowground (arbuscular mycorrhizal fungi, prokaryotes and insect larvae) and seven aboveground groups (vascular plants, bryophytes and lichens; arthropod herbivores; arthropod pollinators; bats and birds). Three descriptors of SADs were evaluated: general shape (abundance decay rate), proportion of rare species (rarity) and proportional abundance of the commonest species (dominance). Across groups, taxonomic richness was largely unaffected by land-use intensity and only decreased with increasing mowing intensity. Of the three SAD descriptors, abundance decay rate became steeper with increasing combined land-use intensity across groups. This reflected a decrease in rarity among plants, herbivores and vertebrates. Effects of fertilization on the three descriptors were similar to the combined land-use intensity effects. Mowing intensity only affected the SAD descriptors of insect larvae and vertebrates, while grazing intensity produced a range of effects on different descriptors in distinct groups. Overall, belowground groups had more even abundance distribtitions than aboveground groups. Strong differences among aboveground groups and between above- and belowground groups indicate that no single taxonomic group can serve as an indicator for effects in other groups. In the past, the use of SADs has been hampered by concerns over theoretical models underlying specific forms of SADs. Our study shows that SAD descriptors that are not connected to a particular model are suitable to assess the effect of land use on community structure.
KW  - Biodiversity
KW  - Cutting frequency
KW  - Management intensity
KW  - Rank-abundance
KW  - Species loss
KW  - Rarity
Y1  - 2017
U6  - https://doi.org/10.1016/j.agee.2016.12.022
SN  - 0167-8809
SN  - 1873-2305
VL  - 237
SP  - 143
EP  - 153
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Vanneste, Thomas
A1  - Valdes, Alicia
A1  - Verheyen, Kris
A1  - Perring, Michael P.
A1  - Bernhardt-Roemermann, Markus
A1  - Andrieu, Emilie
A1  - Brunet, Jorg
A1  - Cousins, Sara A. O.
A1  - Deconchat, Marc
A1  - De Smedt, Pallieter
A1  - Diekmann, Martin
A1  - Ehrmann, Steffen
A1  - Heinken, Thilo
A1  - Hermy, Martin
A1  - Kolb, Annette
A1  - Lenoir, Jonathan
A1  - Liira, Jaan
A1  - Naaf, Tobias
A1  - Paal, Taavi
A1  - Wulf, Monika
A1  - Decocq, Guillaume
A1  - De Frenne, Pieter
T1  - Functional trait variation of forest understorey plant communities across Europe
JF  - Basic and applied ecology : Journal of the Gesellschaft für Ökologie
N2  - Global environmental changes are expected to alter the functional characteristics of understorey herb-layer communities, potentially affecting forest ecosystem functioning. However, little is known about what drives the variability of functional traits in forest understories. Here, we assessed the role of different environmental drivers in shaping the functional trait distribution of understorey herbs in fragmented forests across three spatial scales. We focused on 708 small, deciduous forest patches located in 16 agricultural landscape windows, spanning a 2500-km macroclimatic gradient across the temperate forest biome in Europe. We estimated the relative effect of patch-scale, landscape-scale and macroclimatic variables on the community mean and variation of plant height, specific leaf area and seed mass. Macroclimatic variables (monthly temperature and precipitation extremes) explained the largest proportion of variation in community trait means (on average 77% of the explained variation). In contrast, patch-scale factors dominated in explaining community trait variation (on average 68% of the explained variation). Notably, patch age, size and internal heterogeneity had a positive effect on the community-level variability. Landscape-scale variables explained only a minor part of the variation in both trait distribution properties. The variation explained by shared combinations of the variable groups was generally negligible. These findings highlight the importance of considering multiple spatial scales in predictions of environmental-change effects on the functionality of forest understories. We propose that forest management sustainability could benefit from conserving larger, historically continuous and internally heterogeneous forest patches to maximise ecosystem service diversity in rural landscapes. (C) 2018 Gesellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.
KW  - Agricultural landscapes
KW  - Biogeography
KW  - Community ecology
KW  - Forest understorey
KW  - Functional trait diversity
KW  - Fragmentation
KW  - Global environmental change
KW  - Landscape connectivity
KW  - Macroclimatic gradient
KW  - Multi-scale analysis
Y1  - 2018
U6  - https://doi.org/10.1016/j.baae.2018.09.004
SN  - 1439-1791
SN  - 1618-0089
VL  - 34
SP  - 1
EP  - 14
PB  - Elsevier GmbH
CY  - München
ER  - 
TY  - JOUR
A1  - Koshkina, Olga
A1  - Lang, Thomas
A1  - Thiermann, Raphael
A1  - Docter, Dominic
A1  - Stauber, Roland H.
A1  - Secker, Christian
A1  - Schlaad, Helmut
A1  - Weidner, Steffen
A1  - Mohr, Benjamin
A1  - Maskos, Michael
A1  - Bertin, Annabelle
T1  - Temperature-Triggered Protein Adsorption on Polymer-Coated Nanoparticles in Serum
JF  - Langmuir
N2  - The protein corona, which forms on the nanoparticle's surface in most biological media, determines the nanoparticle's physicochemical characteristics. The formation of the protein corona has a significant impact on the biodistribution and clearance of nanoparticles in vivo. Therefore, the ability to influence the formation of the protein corona is essential to most biomedical applications, including drug delivery and imaging. In this study, we investigate the protein adsorption on nanoparticles with a hydrodynamic radius of 30 nm and a coating of thermoresponsive poly(2-isopropyl-2-oxazoline) in serum. Using multiangle dynamic light scattering (DLS) we demonstrate that heating of the nanoparticles above their phase separation temperature induces the formation of agglomerates, with a hydrodynamic radius of 1 mu m. In serum, noticeably stronger agglomeration occurs at lower temperatures compared to serum-free conditions. Cryogenic transmission electron microscopy (cryo-TEM) revealed a high packing density of agglomerates when serum was not present. In contrast, in the presence of serum, agglomerated nanoparticles were loosely packed, indicating that proteins are intercalated between them. Moreover, an increase in protein content is observed upon heating, confirming that protein adsorption is induced by the alteration of the surface during phase separation. After cooling and switching the surface back, most of the agglomerates were dissolved and the main fraction returned to the original size of approximately 30 nm as shown by asymmetrical flow-field flow fractionation (AF-FFF) and DLS. Furthermore, the amounts of adsorbed proteins are similar before and after heating the nanoparticles to above their phase-separation temperature. Overall, our results demonstrate that the thermoresponsivity of the polymer coating enables turning the corona formation on nanoparticles on and off in situ. As the local heating of body areas can be easily done in vivo, the thermoresponsive coating could potentially be used to induce the agglomeration of nanopartides and proteins and the accumulation of nanoparticles in a targeted body region.
Y1  - 2015
U6  - https://doi.org/10.1021/acs.langmuir.5b00537
SN  - 0743-7463
VL  - 31
IS  - 32
SP  - 8873
EP  - 8881
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - THES
A1  - Thomas, Steffen
T1  - Anwendung von Substituenteneffekten und quantenchemischer Daten zur Zuordnung von 13C-NMR Spektren aromatischer und heteroaromatischer Verbindungen
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Thomas, Steffen
A1  - Kleinpeter, Erich
T1  - Zur Zuordnung der 13C-Chemischen Verschiebungen substituierter Naphthaline aus Ladungsdichten mit Hilfe eines neuronalen Netzes
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Simons, Nadja K.
A1  - Gossner, Martin M.
A1  - Lewinsohn, Thomas M.
A1  - Boch, Steffen
A1  - Lange, Markus
A1  - Müller, Jörg
A1  - Pasalic, Esther
A1  - Socher, Stephanie A.
A1  - Türke, Manfred
A1  - Fischer, Markus
A1  - Weisser, Wolfgang W.
T1  - Resource-mediated indirect effects of grassland management on arthropod diversity
JF  - PLoS one
N2  - Intensive land use is a driving force for biodiversity decline in many ecosystems. In semi-natural grasslands, land-use activities such as mowing, grazing and fertilization affect the diversity of plants and arthropods, but the combined effects of different drivers and the chain of effects are largely unknown. In this study we used structural equation modelling to analyse how the arthropod communities in managed grasslands respond to land use and whether these responses are mediated through changes in resource diversity or resource quantity (biomass). Plants were considered resources for herbivores which themselves were considered resources for predators. Plant and arthropod (herbivores and predators) communities were sampled on 141 meadows, pastures and mown pastures within three regions in Germany in 2008 and 2009. Increasing land-use intensity generally increased plant biomass and decreased plant diversity, mainly through increasing fertilization. Herbivore diversity decreased together with plant diversity but showed no response to changes in plant biomass. Hence, land-use effects on herbivore diversity were mediated through resource diversity rather than quantity. Land-use effects on predator diversity were mediated by both herbivore diversity (resource diversity) and herbivore quantity (herbivore biomass), but indirect effects through resource quantity were stronger. Our findings highlight the importance of assessing both direct and indirect effects of land-use intensity and mode on different trophic levels. In addition to the overall effects, there were subtle differences between the different regions, pointing to the importance of regional land-use specificities. Our study underlines the commonly observed strong effect of grassland land use on biodiversity. It also highlights that mechanistic approaches help us to understand how different land-use modes affect biodiversity.
Y1  - 2014
U6  - https://doi.org/10.1371/journal.pone.0107033
SN  - 1932-6203
VL  - 9
IS  - 9
PB  - PLoS
CY  - San Fransisco
ER  - 
TY  - GEN
A1  - Gliege, Steffen
A1  - Thomas, Björn Daniel
A1  - Steidl, Jörg
A1  - Hohenbrink, Tobias Ludwig
A1  - Dietrich, Ottfried
T1  - Modeling the impact of ditch water level management on stream-aquifer interactions
N2  - Decreasing groundwater levels in many parts of Germany and decreasing low flows in Central Europe have created a need for adaptation measures to stabilize the water balance and to increase low flows. The objective of our study was to estimate the impact of ditch water level management on stream-aquifer interactions in small lowland catchments of the mid-latitudes. The water balance of a ditch-irrigated area and fluxes between the subsurface and the adjacent stream were modeled for three runoff recession periods using the Hydrus-2D software package. The results showed that the subsurface flow to the stream was closely related to the difference between the water level in the ditch system and the stream. Evapotranspiration during the growing season additionally reduced base flow. It was crucial to stop irrigation during a recession period to decrease water withdrawal from the stream and enhance the base flow by draining the irrigated area. Mean fluxes to the stream were between 0.04 and 0.64 ls(-1) for the first 20 days of the low-flow periods. This only slightly increased the flow in the stream, whose mean was 57 ls(-1) during the period with the lowest flows. Larger areas would be necessary to effectively increase flows in mesoscale catchments.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 445 
KW  - ditch irrigation
KW  - adaption measure
KW  - Hydrus-2D
KW  - required minimum runoff
KW  - groundwater surface water interaction
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-407613
ER  - 
TY  - JOUR
A1  - Gliege, Steffen
A1  - Thomas, Bjoern D.
A1  - Steidl, Jörg
A1  - Hohenbrink, Tobias Ludwig
A1  - Dietrich, Ottfried
T1  - Modeling the Impact of Ditch Water Level Management on Stream-Aquifer Interactions
JF  - Water
N2  - Decreasing groundwater levels in many parts of Germany and decreasing low flows in Central Europe have created a need for adaptation measures to stabilize the water balance and to increase low flows. The objective of our study was to estimate the impact of ditch water level management on stream-aquifer interactions in small lowland catchments of the mid-latitudes. The water balance of a ditch-irrigated area and fluxes between the subsurface and the adjacent stream were modeled for three runoff recession periods using the Hydrus-2D software package. The results showed that the subsurface flow to the stream was closely related to the difference between the water level in the ditch system and the stream. Evapotranspiration during the growing season additionally reduced base flow. It was crucial to stop irrigation during a recession period to decrease water withdrawal from the stream and enhance the base flow by draining the irrigated area. Mean fluxes to the stream were between 0.04 and 0.64 ls(-1) for the first 20 days of the low-flow periods. This only slightly increased the flow in the stream, whose mean was 57 ls(-1) during the period with the lowest flows. Larger areas would be necessary to effectively increase flows in mesoscale catchments.
KW  - ditch irrigation
KW  - adaption measure
KW  - Hydrus-2D
KW  - required minimum runoff
KW  - groundwater surface water interaction
Y1  - 2016
U6  - https://doi.org/10.3390/w8030102
SN  - 2073-4441
VL  - 8
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Figueroa Campos, Gustavo Adolfo
A1  - G. K. T. Kruizenga, Johannes
A1  - Sagu Tchewonpi, Sorel
A1  - Schwarz, Steffen
A1  - Homann, Thomas
A1  - Taubert, Andreas
A1  - Rawel, Harshadrai Manilal
T1  - Effect of the post-harvest processing on protein modification in green coffee beans by phenolic compounds
JF  - Foods : open access journal
N2  - The protein fraction, important for coffee cup quality, is modified during post-harvest treatment prior to roasting. Proteins may interact with phenolic compounds, which constitute the major metabolites of coffee, where the processing affects these interactions. This allows the hypothesis that the proteins are denatured and modified via enzymatic and/or redox activation steps. The present study was initiated to encompass changes in the protein fraction. The investigations were limited to major storage protein of green coffee beans. Fourteen Coffea arabica samples from various processing methods and countries were used. Different extraction protocols were compared to maintain the status quo of the protein modification. The extracts contained about 4–8 µg of chlorogenic acid derivatives per mg of extracted protein. High-resolution chromatography with multiple reaction monitoring was used to detect lysine modifications in the coffee protein. Marker peptides were allocated for the storage protein of the coffee beans. Among these, the modified peptides K.FFLANGPQQGGK.E and R.LGGK.T of the α-chain and R.ITTVNSQK.I and K.VFDDEVK.Q of β-chain were detected. Results showed a significant increase (p < 0.05) of modified peptides from wet processed green beans as compared to the dry ones. The present study contributes to a better understanding of the influence of the different processing methods on protein quality and its role in the scope of coffee cup quality and aroma. View Full-Text
KW  - Arabica coffee
KW  - coffee processing
KW  - protein modification
KW  - bound phenolic compounds
KW  - peptide biomarkers
KW  - LC-MS/MS
Y1  - 2022
U6  - https://doi.org/10.3390/foods11020159
SN  - 2304-8158
VL  - 11
PB  - MDPI
CY  - Basel, Schweiz
ET  - 2
ER  - 
TY  - BOOK
A1  - Mientus, Lukas
A1  - Klempin, Christiane
A1  - Nowak, Anna
A1  - Wyss, Corinne
A1  - Aufschnaiter, Claudia von
A1  - Faix, Ann-Christin
A1  - te Poel, Kathrin
A1  - Wahbe, Nadia
A1  - Pieper, Martin
A1  - Höller, Katharina
A1  - Kallenbach, Lea
A1  - Förster, Magdalena
A1  - Redecker, Anke
A1  - Dick, Mirjam
A1  - Holle, Jörg
A1  - Schneider, Edina
A1  - Rehfeldt, Daniel
A1  - Brauns, Sarah
A1  - Abels, Simone
A1  - Ferencik-Lehmkuhl, Daria
A1  - Fränkel, Silvia
A1  - Frohn, Julia
A1  - Liebsch, Ann-Catherine
A1  - Pech, Detlef
A1  - Schreier, Pascal
A1  - Jessen, Moiken
A1  - Großmann, Uta
A1  - Skintey, Lesya
A1  - Voerkel, Paul
A1  - Vaz Ferreira, Mergenfel A.
A1  - Zimmermann, Jan-Simon
A1  - Buddeberg, Magdalena
A1  - Henke, Vanessa
A1  - Hornberg, Sabine
A1  - Völschow, Yvette
A1  - Warrelmann, Julia-Nadine
A1  - Malek, Jennifer
A1  - Tinnefeld, Anja
A1  - Schmidt, Peggy
A1  - Bauer, Tobias
A1  - Jänisch, Christopher
A1  - Spitzer, Lisa
A1  - Franken, Nadine
A1  - Degeling, Maria
A1  - Preisfeld, Angelika
A1  - Meier, Jana
A1  - Küth, Simon
A1  - Scholl, Daniel
A1  - Vogelsang, Christoph
A1  - Watson, Christina
A1  - Weißbach, Anna
A1  - Kulgemeyer, Christoph
A1  - Oetken, Mandy
A1  - Gorski, Sebastian
A1  - Kubsch, Marcus
A1  - Sorge, Stefan
A1  - Wulff, Peter
A1  - Fellenz, Carolin D.
A1  - Schnell, Susanne
A1  - Larisch, Cathleen
A1  - Kaiser, Franz
A1  - Knott, Christina
A1  - Reimer, Stefanie
A1  - Stegmüller, Nathalie
A1  - Boukrayâa Trabelsi, Kathrin
A1  - Schißlbauer, Franziska
A1  - Lemberger, Lukas
A1  - Barth, Ulrike
A1  - Wiehl, Angelika
A1  - Rogge, Tim
A1  - Böhnke, Anja
A1  - Dietz, Dennis
A1  - Großmann, Leroy
A1  - Wienmeister, Annett
A1  - Zoppke, Till
A1  - Jiang, Lisa
A1  - Grünbauer, Stephanie
A1  - Ostersehlt, Dörte
A1  - Peukert, Sophia
A1  - Schäfer, Christoph
A1  - Löbig, Anna
A1  - Bröll, Leena
A1  - Brandt, Birgit
A1  - Breuer, Meike
A1  - Dausend, Henriette
A1  - Krelle, Michael
A1  - Andersen, Gesine
A1  - Falke, Sascha
A1  - Kindermann-Güzel, Kristin
A1  - Körner, Katrina
A1  - Lottermoser, Lisa-Marie
A1  - Pügner, Kati
A1  - Sonnenburg, Nadine
A1  - Akarsu, Selim
A1  - Rechl, Friederike
A1  - Gadinger, Laureen
A1  - Heinze, Lena
A1  - Wittmann, Eveline
A1  - Franke, Manuela
A1  - Lachmund, Anne-Marie
A1  - Böttger, Julia
A1  - Hannover, Bettina
A1  - Behrendt, Renata
A1  - Conty, Valentina
A1  - Grundmann, Stephanie
A1  - Ghassemi, Novid
A1  - Opitz, Ben
A1  - Brämer, Martin
A1  - Gasparjan, David
A1  - Sambanis, Michaela
A1  - Köster, Hilde
A1  - Lücke, Martin
A1  - Nordmeier, Volkhard
A1  - Schaal, Sonja
A1  - Haberbosch, Maximilian
A1  - Meissner, Maren
A1  - Schaal, Steffen
A1  - Brüchner, Melanie
A1  - Riehle, Tamara
A1  - Leopold, Bengta Marie
A1  - Gerlach, Susanne
A1  - Rau-Patschke, Sarah
A1  - Skorsetz, Nina
A1  - Weber, Nadine
A1  - Damköhler, Jens
A1  - Elsholz, Markus
A1  - Trefzger, Thomas
A1  - Lewek, Tobias
A1  - Borowski, Andreas
ED  - Mientus, Lukas
ED  - Klempin, Christiane
ED  - Nowak, Anna
T1  - Reflexion in der Lehrkräftebildung
BT  - Empirisch – Phasenübergreifend – Interdisziplinär
T3  - Potsdamer Beiträge für Lehrkräftebildung und Bildungsforschung
N2  - Reflexion ist eine Schlüsselkategorie für die professionelle Entwicklung von Lehrkräften, welche als Ausbildungsziel in den Bildungsstandards für die Lehrkräftebildung verankert ist. Eine Verstetigung universitär geprägter Forschung und Modellierung in der praxisnahen Anwendung im schulischen Kontext bietet Potentiale nachhaltiger Professionalisierung. Die Stärkung reflexionsbezogener Kompetenzen durch Empirie und Anwendung scheint eine phasenübergreifende Herausforderung der Lehrkräftebildung zu sein, die es zu bewältigen gilt. Ziele des Tagungsbandes Reflexion in der Lehrkräftebildung sind eine theoretische Schärfung des Konzeptes „Reflexive Professionalisierung“ und der Austausch über Fragen der Einbettung wirksamer reflexionsbezogener Lerngelegenheiten in die Lehrkräftebildung. Forschende und Lehrende der‚ drei Phasen (Studium, Referendariat sowie Fort- und Weiterbildung) der Lehrkräftebildung stellen Lehrkonzepte und Forschungsprojekte zum Thema Reflexion in der Lehrkräftebildung vor und diskutieren diese. Gemeinsam mit Teilnehmenden aller Phasen und von verschiedenen Standorten der Lehrkräftebildung werden zukünftige Herausforderungen identifiziert und Lösungsansätze herausgearbeitet.
T3  - Potsdamer Beiträge zur Lehrkräftebildung und Bildungsforschung - 4 
KW  - Reflexion
KW  - Lehrkräftebildung
KW  - Reflexionskompetenz
KW  - Reflexivität
KW  - Feedback
KW  - Reflection
KW  - Teacher Education
KW  - Reflection Skills
KW  - Reflexivity
KW  - Feedback
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-591717
SN  - 978-3-86956-566-8
SN  - 2626-3556
SN  - 2626-4722
IS  - 4
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  - 
TY  - GEN
A1  - Figueroa Campos, Gustavo A.
A1  - G. K. T. Kruizenga, Johannes
A1  - Sagu Tchewonpi, Sorel
A1  - Schwarz, Steffen
A1  - Homann, Thomas
A1  - Taubert, Andreas
A1  - Rawel, Harshadrai
T1  - Effect of the Post-Harvest Processing on Protein Modification in Green Coffee Beans by Phenolic Compounds
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - The protein fraction, important for coffee cup quality, is modified during post-harvest treatment prior to roasting. Proteins may interact with phenolic compounds, which constitute the major metabolites of coffee, where the processing affects these interactions. This allows the hypothesis that the proteins are denatured and modified via enzymatic and/or redox activation steps. The present study was initiated to encompass changes in the protein fraction. The investigations were limited to major storage protein of green coffee beans. Fourteen Coffea arabica samples from various processing methods and countries were used. Different extraction protocols were compared to maintain the status quo of the protein modification. The extracts contained about 4–8 µg of chlorogenic acid derivatives per mg of extracted protein. High-resolution chromatography with multiple reaction monitoring was used to detect lysine modifications in the coffee protein. Marker peptides were allocated for the storage protein of the coffee beans. Among these, the modified peptides K.FFLANGPQQGGK.E and R.LGGK.T of the α-chain and R.ITTVNSQK.I and K.VFDDEVK.Q of β-chain were detected. Results showed a significant increase (p < 0.05) of modified peptides from wet processed green beans as compared to the dry ones. The present study contributes to a better understanding of the influence of the different processing methods on protein quality and its role in the scope of coffee cup quality and aroma. View Full-Text
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1256 
KW  - Arabica coffee
KW  - coffee processing
KW  - protein modification
KW  - bound phenolic compounds
KW  - peptide biomarkers
KW  - LC-MS/MS
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-557643
SN  - 1866-8372
VL  - 11
SP  - 1
EP  - 19
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ET  - 2
ER  - 
TY  - JOUR
A1  - Bergweiler, Steffen
A1  - Bergner, André
A1  - Görne, Thomas
A1  - Wegener, Michael
A1  - Gerhard, Reimund
T1  - Breathing modes and sound radiation of metallic organ pipes
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Prieske, Olaf
A1  - Mühlbauer, Thomas
A1  - Müller, Steffen
A1  - Krüger, Tom
A1  - Kibele, Armin
A1  - Behm, David George
A1  - Granacher, Urs
T1  - Effects of surface instability on neuromuscular performance during drop jumps and landings
JF  - European journal of applied physiology
N2  - The purpose of this study was to investigate the effects of surface instability on measures of performance and activity of leg and trunk muscles during drop jumps and landings.
 Drop jumps and landings were assessed on a force plate under stable and unstable (balance pad on top of the force plate) conditions. Performance measures (contact time, jump height, peak ground reaction force) and electromyographic (EMG) activity of leg and trunk muscles were tested in 27 subjects (age 23 +/- A 3 years) during different time intervals (preactivation phase, braking phase, push-off phase).
 The performance of drop jumps under unstable compared to stable conditions produced a decrease in jump height (9 %, p < 0.001, f = 0.92) and an increase in peak ground reaction force (5 %, p = 0.022, f = 0.72), and time for braking phase (12 %, p < 0.001, f = 1.25). When performing drop jumps on unstable compared to stable surfaces, muscle activity was reduced in the lower extremities during the preactivation, braking and push-off phases (11-25 %, p < 0.05, 0.48 a parts per thousand currency sign f a parts per thousand currency sign 1.23). Additionally, when landing on unstable compared to stable conditions, reduced lower limb muscle activities were observed during the preactivation phase (7-60 %, p < 0.05, 0.50 a parts per thousand currency sign f a parts per thousand currency sign 3.62). Trunk muscle activity did not significantly differ between the test conditions for both jumping and landing tasks.
 The present findings indicate that modified feedforward mechanisms in terms of lower leg muscle activities during the preactivation phase and/or possible alterations in leg muscle activity shortly after ground contact (i.e., braking phase) are responsible for performance decrements during jumping on unstable surfaces.
KW  - Stretch-shortening cycle
KW  - Trunk muscle strength
KW  - Jump height
KW  - Electromyography
Y1  - 2013
U6  - https://doi.org/10.1007/s00421-013-2724-6
SN  - 1439-6319
SN  - 1439-6327
VL  - 113
IS  - 12
SP  - 2943
EP  - 2951
PB  - Springer
CY  - New York
ER  - 
TY  - GEN
A1  - Heistermann, Maik
A1  - Bogena, Heye
A1  - Francke, Till
A1  - Güntner, Andreas
A1  - Jakobi, Jannis
A1  - Rasche, Daniel
A1  - Schrön, Martin
A1  - Döpper, Veronika
A1  - Fersch, Benjamin
A1  - Groh, Jannis
A1  - Patil, Amol
A1  - Pütz, Thomas
A1  - Reich, Marvin
A1  - Zacharias, Steffen
A1  - Zengerle, Carmen
A1  - Oswald, Sascha
T1  - Soil moisture observation in a forested headwater catchment: combining a dense cosmic-ray neutron sensor network with roving and hydrogravimetry at the TERENO site Wüstebach
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Cosmic-ray neutron sensing (CRNS) has become an effective method to measure soil moisture at a horizontal scale of hundreds of metres and a depth of decimetres. Recent studies proposed operating CRNS in a network with overlapping footprints in order to cover root-zone water dynamics at the small catchment scale and, at the same time, to represent spatial heterogeneity. In a joint field campaign from September to November 2020 (JFC-2020), five German research institutions deployed 15 CRNS sensors in the 0.4 km2 Wüstebach catchment (Eifel mountains, Germany). The catchment is dominantly forested (but includes a substantial fraction of open vegetation) and features a topographically distinct catchment boundary. In addition to the dense CRNS coverage, the campaign featured a unique combination of additional instruments and techniques: hydro-gravimetry (to detect water storage dynamics also below the root zone); ground-based and, for the first time, airborne CRNS roving; an extensive wireless soil sensor network, supplemented by manual measurements; and six weighable lysimeters. Together with comprehensive data from the long-term local research infrastructure, the published data set (available at https://doi.org/10.23728/b2share.756ca0485800474e9dc7f5949c63b872; Heistermann et al., 2022) will be a valuable asset in various research contexts: to advance the retrieval of landscape water storage from CRNS, wireless soil sensor networks, or hydrogravimetry; to identify scale-specific combinations of sensors and methods to represent soil moisture variability; to improve the understanding and simulation of land–atmosphere exchange as well as hydrological and hydrogeological processes at the hillslope and the catchment scale; and to support the retrieval of soil water content from airborne and spaceborne remote sensing platforms.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1272 
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-567756
SN  - 1866-8372
IS  - 1272
SP  - 2501
EP  - 2519
ER  - 
TY  - JOUR
A1  - Fritsch, Tobias
A1  - Kurpiers, Jona
A1  - Roland, Steffen
A1  - Tokmoldin, Nurlan
A1  - Shoaee, Safa
A1  - Ferron, Thomas
A1  - Collins, Brian A.
A1  - Janietz, Silvia
A1  - Vandewal, Koen
A1  - Neher, Dieter
T1  - On the interplay between CT and singlet exciton emission in organic solar cells with small driving force and its impact on voltage loss
JF  - Advanced energy materials
N2  - The interplay between free charge carriers, charge transfer (CT) states and singlet excitons (S-1) determines the recombination pathway and the resulting open circuit voltage (V-OC) of organic solar cells. 
By combining a well-aggregated low bandgap polymer with different blend ratios of the fullerenes PCBM and ICBA, the energy of the CT state (E-CT) is varied by 130 meV while leaving the S-1 energy of the polymer (ES1\[{E_{{{\rm{S}}_1}}}\]) unaffected. 
It is found that the polymer exciton dominates the radiative properties of the blend when ECT\[{E_{{\rm{CT}}}}\] approaches ES1\[{E_{{{\rm{S}}_1}}}\], while the V-OC remains limited by the non-radiative decay of the CT state. 
It is concluded that an increasing strength of the exciton in the optical spectra of organic solar cells will generally decrease the non-radiative voltage loss because it lowers the radiative V-OC limit (V-OC,V-rad), but not because it is more emissive. 
The analysis further suggests that electronic coupling between the CT state and the S-1 will not improve the V-OC, but rather reduce the V-OC,V-rad. 
It is anticipated that only at very low CT state absorption combined with a fairly high CT radiative efficiency the solar cell benefit from the radiative properties of the singlet excitons.
KW  - external quantum efficiency
KW  - organic photovoltaics
KW  - ternary blends
KW  - voltage losses
Y1  - 2022
U6  - https://doi.org/10.1002/aenm.202200641
SN  - 1614-6832
SN  - 1614-6840
VL  - 12
IS  - 31
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Vorburger, Thomas
A1  - Nedielkov, Ruslan
A1  - Brosig, Alexander
A1  - Bok, Eva
A1  - Schunke, Emina
A1  - Steffen, Wojtek
A1  - Mayer, Sonja
A1  - Goetz, Friedrich
A1  - Möller, Heiko Michael
A1  - Steuber, Julia
T1  - Role of the Na+-translocating NADH:quinone oxidoreductase in voltage generation and Na+ extrusion in Vibrio cholerae
JF  - Biochimica et biophysica acta : Bioenergetics
N2  - For Vibrio cholerae, the coordinated import and export of Na+ is crucial for adaptation to habitats with different osmolarities. We investigated the Na+-extruding branch of the sodium cycle in this human pathogen by in vivo Na-23-NMR spectroscopy. The Na+ extrusion activity of cells was monitored after adding glucose which stimulated respiration via the Na+-translocating NADH:quinone oxidoreductase (Na+-NQR). In a V. cholerae deletion mutant devoid of the Na+-NQR encoding genes (nqrA-F), rates of respiratory Na+ extrusion were decreased by a factor of four, but the cytoplasmic Na+ concentration was essentially unchanged. Furthermore, the mutant was impaired in formation of transmembrane voltage (Delta psi, inside negative) and did not grow under hypoosmotic conditions at pH 8.2 or above. This growth defect could be complemented by transformation with the plasmid encoded nqr operon. In an alkaline environment, Na+/H+ antiporters acidify the cytoplasm at the expense of the transmembrane voltage. It is proposed that, at alkaline pH and limiting Na+ concentrations, the Na+-NQR is crucial for generation of a transmembrane voltage to drive the import of H+ by electrogenic Na+/H+ antiporters. Our study provides the basis to understand the role of the Na+-NQR in pathogenicity of V. cholerae and other pathogens relying on this primary Na+ pump for respiration. (C) 2015 Elsevier B.V. All rights reserved.
KW  - Nuclear magnetic resonance (NMR)
KW  - Sodium transport
KW  - Vibrio cholerae
KW  - Respiration
KW  - Na+ homeostasis
KW  - Hypoosmotic stress
Y1  - 2016
U6  - https://doi.org/10.1016/j.bbabio.2015.12.010
SN  - 0005-2728
SN  - 0006-3002
VL  - 1857
SP  - 473
EP  - 482
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Zeuschner, Steffen Peer
A1  - Parpiiev, Tymur
A1  - Pezeril, Thomas
A1  - Hillion, Arnaud
A1  - Dumesnil, Karine
A1  - Anane, Abdelmadjid
A1  - Pudell, Jan-Etienne
A1  - Willig, Lisa
A1  - Rössle, Matthias
A1  - Herzog, Marc
A1  - Reppert, Alexander von
A1  - Bargheer, Matias
T1  - Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction
JF  - Structural Dynamics
N2  - We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructures. Spatial separation of the Nb detection layer from the laser excitation region allows for a background-free characterization of the laser-generated strain pulses. We clearly observe symmetric bipolar strain pulses if the excited TbFe2 surface terminates the sample and a decomposition of the strain wavepacket into an asymmetric bipolar and a unipolar pulse, if a SiO2 glass capping layer covers the excited TbFe2 layer. The inverse magnetostriction of the temporally separated unipolar strain pulses in this sample leads to a MOKE signal that linearly depends on the strain pulse amplitude measured through UXRD. Linear chain model simulations accurately predict the timing and shape of UXRD and MOKE signals that are caused by the strain reflections from multiple interfaces in the heterostructure.
KW  - Heterostructures
KW  - Magnetooptical effects
KW  - Metal oxides
KW  - Crystal lattices
KW  - Transition metals
KW  - Magnetism
KW  - Ultrafast X-ray diffraction
KW  - Lasers
KW  - Bragg peak
KW  - Phonons
Y1  - 2019
U6  - https://doi.org/10.1063/1.5084140
SN  - 2329-7778
VL  - 6
IS  - 2
PB  - AIP Publishing LLC
CY  - Melville, NY
ER  - 
TY  - JOUR
A1  - Thomas, Steffen
A1  - Kleinpeter, Erich
T1  - A novel empirical approach for the structure elucidation of disilanes by empirical estimation of their Si-29 chemical shifts
N2  - In C-13 NMR spectroscopy, there are many empirical methods for fast and exact computation of C-13 chemical shifts; comparable procedures for Si-29 NMR chemical shifts are not existing or are older than 20 years. On basis of the largest database of Si-29 chemical shifts available, along this paper a relatively simple procedure for the similarly exact calculation of the Si-29 chemical shifts of disilanes (average margin of error ca. 3.7 ppm) is given. (c) 2005 Elsevier B.V. All rights reserved
Y1  - 2005
SN  - 0022-2860
ER  - 
TY  - JOUR
A1  - Koch, Andreas
A1  - Thomas, Steffen
A1  - Kleinpeter, Erich
T1  - Ab-initio study, semi-empirical calculation and NMR spectroscopy of keto-enol tautomerism of triazolopyrimidines
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Thomas, Steffen
A1  - Kleinpeter, Erich
T1  - Internet und World Wide Web : Nutzen für den NMR Spektroskopiker
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Miklos, F.
A1  - Kanizsai, I.
A1  - Thomas, Steffen
A1  - Kleinpeter, Erich
A1  - Sillanpaa, R.
A1  - Stajer, G.
T1  - Preparation and structure of diexo-oxanorbornane-fused 1,3-heterocycles
N2  - Via the reaction of diexo-oxanorbornanedicarboxylic anhydride with toluene, the diexo-aroylcarboxylic acid (3a) was prepared, which exists partly as the tautomeric lactol (3b). With bifunctional reagents, 3a yields fused heterocycles containing three-six rings. Thus, alkylenediamines result in imidazole- and 1,3-diazepine-fused oxygen- bridged isoindolones (6a,b), alkanolamines form the oxazole- and 1,3-oxazine-fused oxanorbornene derivatives (7a-c), and o-phenylenediamine undergoes cyclization to furnish the condensed benzimidazole (8). The reaction of 3a with diexo- aminonorbornanecarbohydrazide yields a pyrimidopyridazine containing six condensed rings (9). In a similar reaction with diendo-aminonorbornenecarbohydrazide, cyclopentadiene cleaves off to give the tricyclic retro Diels-Alder product (10). The structures, and particulary the configurations at the oxanorbornane ring systems and the position of the aryl substituent, were established by means of 1D- and 2D-NMR spectroscopy and, for 3b and 7c, also by X-Ray measurements
Y1  - 2004
SN  - 0385-5414
ER  - 
TY  - JOUR
A1  - Benassi, Rois
A1  - Bertarini, C.
A1  - Kleinpeter, Erich
A1  - Taddei, F.
A1  - Thomas, Steffen
T1  - Exocyclic push-pull conjugated compounds : Part 1 ; theoretical study of the effect of ring size on the structure, electronic properties and rotational barriers of cyclic analogoues of 1,1-diamino-2.2-dicyanoethylene
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Benassi, Rois
A1  - Bertarini, C.
A1  - Hilfert, Liane
A1  - Kempter, Gerhard
A1  - Kleinpeter, Erich
A1  - Spindler, Jürgen
A1  - Taddei, F.
A1  - Thomas, Steffen
T1  - Exocyclic push-pull conjugated compounds : Part 3
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Thomas, Steffen
A1  - Brühl, Iris
A1  - Heilmann, Dieter
A1  - Kleinpeter, Erich
T1  - 13 C NMR Chemical shift calculations for some substituted pyridines - a comparative consideration
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Kleinpeter, Erich
A1  - Thomas, Steffen
A1  - Fischer, G.
T1  - 13C and 15N NMR study of 1,2,4-Triazolo[1,5-a]pyrimidines with one tautomerism-introducing substituent
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Ströhl, D.
A1  - Thomas, Steffen
A1  - Radeglia, R.
A1  - Brunn, J.
A1  - Kleinpeter, Erich
T1  - 13C-NMR-Untersuchungen von Substituenteneffekten in mehrfach substituierten Benz-und Naphthalenderivaten ; Inkrementberechnungen der 13C-chemischen Verschiebungen
Y1  - 1992
ER  - 
TY  - JOUR
A1  - Kleinpeter, Erich
A1  - Thomas, Steffen
A1  - Uhlig, G.
A1  - Rudorf, Wolf-Dieter
T1  - Study of the distribution of pi-Electrons in Push-Pull Alkenes by 1H an 13C NMR spectroscopy
Y1  - 1993
ER  - 
TY  - JOUR
A1  - Gossner, Martin M.
A1  - Lewinsohn, Thomas M.
A1  - Kahl, Tiemo
A1  - Grassein, Fabrice
A1  - Boch, Steffen
A1  - Prati, Daniel
A1  - Birkhofer, Klaus
A1  - Renner, Swen C.
A1  - Sikorski, Johannes
A1  - Wubet, Tesfaye
A1  - Arndt, Hartmut
A1  - Baumgartner, Vanessa
A1  - Blaser, Stefan
A1  - Blüthgen, Nico
A1  - Börschig, Carmen
A1  - Buscot, Francois
A1  - Diekötter, Tim
A1  - Jorge, Leonardo Re
A1  - Jung, Kirsten
A1  - Keyel, Alexander C.
A1  - Klein, Alexandra-Maria
A1  - Klemmer, Sandra
A1  - Krauss, Jochen
A1  - Lange, Markus
A1  - Müller, Jörg
A1  - Overmann, Jörg
A1  - Pasalic, Esther
A1  - Penone, Caterina
A1  - Perovic, David J.
A1  - Purschke, Oliver
A1  - Schall, Peter
A1  - Socher, Stephanie A.
A1  - Sonnemann, Ilja
A1  - Tschapka, Marco
A1  - Tscharntke, Teja
A1  - Türke, Manfred
A1  - Venter, Paul Christiaan
A1  - Weiner, Christiane N.
A1  - Werner, Michael
A1  - Wolters, Volkmar
A1  - Wurst, Susanne
A1  - Westphal, Catrin
A1  - Fischer, Markus
A1  - Weisser, Wolfgang W.
A1  - Allan, Eric
T1  - Land-use intensification causes multitrophic homogenization of grassland communities
JF  - Nature : the international weekly journal of science
N2  - Land-use intensification is a major driver of biodiversity loss(1,2). Alongside reductions in local species diversity, biotic homogenization at larger spatial scales is of great concern for conservation. Biotic homogenization means a decrease in beta-diversity (the compositional dissimilarity between sites). Most studies have investigated losses in local (alpha)-diversity(1,3) and neglected biodiversity loss at larger spatial scales. Studies addressing beta-diversity have focused on single or a few organism groups (for example, ref. 4), and it is thus unknown whether land-use intensification homogenizes communities at different trophic levels, above-and belowground. Here we show that even moderate increases in local land-use intensity (LUI) cause biotic homogenization across microbial, plant and animal groups, both above- and belowground, and that this is largely independent of changes in alpha-diversity. We analysed a unique grassland biodiversity dataset, with abundances of more than 4,000 species belonging to 12 trophic groups. LUI, and, in particular, high mowing intensity, had consistent effects on beta-diversity across groups, causing a homogenization of soil microbial, fungal pathogen, plant and arthropod communities. These effects were nonlinear and the strongest declines in beta-diversity occurred in the transition from extensively managed to intermediate intensity grassland. LUI tended to reduce local alpha-diversity in aboveground groups, whereas the alpha-diversity increased in belowground groups. Correlations between the alpha-diversity of different groups, particularly between plants and their consumers, became weaker at high LUI. This suggests a loss of specialist species and is further evidence for biotic homogenization. The consistently negative effects of LUI on landscape-scale biodiversity underscore the high value of extensively managed grasslands for conserving multitrophic biodiversity and ecosystem service provision. Indeed, biotic homogenization rather than local diversity loss could prove to be the most substantial consequence of land-use intensification.
Y1  - 2016
U6  - https://doi.org/10.1038/nature20575
SN  - 0028-0836
SN  - 1476-4687
VL  - 540
SP  - 266
EP  - +
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - JOUR
A1  - Allan, Eric
A1  - Bossdorf, Oliver
A1  - Dormann, Carsten F.
A1  - Prati, Daniel
A1  - Gossner, Martin M.
A1  - Tscharntke, Teja
A1  - Blüthgen, Nico
A1  - Bellach, Michaela
A1  - Birkhofer, Klaus
A1  - Boch, Steffen
A1  - Böhm, Stefan
A1  - Börschig, Carmen
A1  - Chatzinotas, Antonis
A1  - Christ, Sabina
A1  - Daniel, Rolf
A1  - Diekötter, Tim
A1  - Fischer, Christiane
A1  - Friedl, Thomas
A1  - Glaser, Karin
A1  - Hallmann, Christine
A1  - Hodac, Ladislav
A1  - Hölzel, Norbert
A1  - Jung, Kirsten
A1  - Klein, Alexandra-Maria
A1  - Klaus, Valentin H.
A1  - Kleinebecker, Till
A1  - Krauss, Jochen
A1  - Lange, Markus
A1  - Morris, E. Kathryn
A1  - Müller, Jörg
A1  - Nacke, Heiko
A1  - Pasalic, Esther
A1  - Rillig, Matthias C.
A1  - Rothenwoehrer, Christoph
A1  - Schally, Peter
A1  - Scherber, Christoph
A1  - Schulze, Waltraud X.
A1  - Socher, Stephanie A.
A1  - Steckel, Juliane
A1  - Steffan-Dewenter, Ingolf
A1  - Türke, Manfred
A1  - Weiner, Christiane N.
A1  - Werner, Michael
A1  - Westphal, Catrin
A1  - Wolters, Volkmar
A1  - Wubet, Tesfaye
A1  - Gockel, Sonja
A1  - Gorke, Martin
A1  - Hemp, Andreas
A1  - Renner, Swen C.
A1  - Schöning, Ingo
A1  - Pfeiffer, Simone
A1  - König-Ries, Birgitta
A1  - Buscot, Francois
A1  - Linsenmair, Karl Eduard
A1  - Schulze, Ernst-Detlef
A1  - Weisser, Wolfgang W.
A1  - Fischer, Markus
T1  - Interannual variation in land-use intensity enhances grassland multidiversity
JF  - Proceedings of the National Academy of Sciences of the United States of America
N2  - Although temporal heterogeneity is a well-accepted driver of biodiversity, effects of interannual variation in land-use intensity (LUI) have not been addressed yet. Additionally, responses to land use can differ greatly among different organisms; therefore, overall effects of land-use on total local biodiversity are hardly known. To test for effects of LUI (quantified as the combined intensity of fertilization, grazing, and mowing) and interannual variation in LUI (SD in LUI across time), we introduce a unique measure of whole-ecosystem biodiversity, multidiversity. This synthesizes individual diversity measures across up to 49 taxonomic groups of plants, animals, fungi, and bacteria from 150 grasslands. Multidiversity declined with increasing LUI among grasslands, particularly for rarer species and aboveground organisms, whereas common species and belowground groups were less sensitive. However, a high level of interannual variation in LUI increased overall multidiversity at low LUI and was even more beneficial for rarer species because it slowed the rate at which the multidiversity of rare species declined with increasing LUI. In more intensively managed grasslands, the diversity of rarer species was, on average, 18% of the maximum diversity across all grasslands when LUI was static over time but increased to 31% of the maximum when LUI changed maximally over time. In addition to decreasing overall LUI, we suggest varying LUI across years as a complementary strategy to promote biodiversity conservation.
KW  - biodiversity loss
KW  - agricultural grasslands
KW  - Biodiversity Exploratories
Y1  - 2014
U6  - https://doi.org/10.1073/pnas.1312213111
SN  - 0027-8424
VL  - 111
IS  - 1
SP  - 308
EP  - 313
PB  - National Acad. of Sciences
CY  - Washington
ER  - 
TY  - JOUR
A1  - Kurpiers, Jona
A1  - Ferron, Thomas
A1  - Roland, Steffen
A1  - Jakoby, Marius
A1  - Thiede, Tobias
A1  - Jaiser, Frank
A1  - Albrecht, Steve
A1  - Janietz, Silvia
A1  - Collins, Brian A.
A1  - Howard, Ian A.
A1  - Neher, Dieter
T1  - Probing the pathways of free charge generation in organic bulk heterojunction solar cells
JF  - Nature Communications
N2  - The fact that organic solar cells perform efficiently despite the low dielectric constant of most photoactive blends initiated a long-standing debate regarding the dominant pathways of free charge formation. Here, we address this issue through the accurate measurement of the activation energy for free charge photogeneration over a wide range of photon energy, using the method of time-delayed collection field. For our prototypical low bandgap polymer:fullerene blends, we find that neither the temperature nor the field dependence of free charge generation depend on the excitation energy, ruling out an appreciable contribution to free charge generation though hot carrier pathways. On the other hand, activation energies are on the order of the room temperature thermal energy for all studied blends. We conclude that charge generation in such devices proceeds through thermalized charge transfer states, and that thermal energy is sufficient to separate most of these states into free charges.
Y1  - 2018
U6  - https://doi.org/10.1038/s41467-018-04386-3
SN  - 2041-1723
VL  - 9
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - JOUR
A1  - Sini, Gjergji
A1  - Schubert, Marcel
A1  - Risko, Chad
A1  - Roland, Steffen
A1  - Lee, Olivia P.
A1  - Chen, Zhihua
A1  - Richter, Thomas V.
A1  - Dolfen, Daniel
A1  - Coropceanu, Veaceslav
A1  - Ludwigs, Sabine
A1  - Scherf, Ullrich
A1  - Facchetti, Antonio
A1  - Frechet, Jean M. J.
A1  - Neher, Dieter
T1  - On the Molecular Origin of Charge Separation at the Donor-Acceptor Interface
JF  - Advanced energy materials
N2  - Fullerene-based acceptors have dominated organic solar cells for almost two decades. It is only within the last few years that alternative acceptors rival their dominance, introducing much more flexibility in the optoelectronic properties of these material blends. However, a fundamental physical understanding of the processes that drive charge separation at organic heterojunctions is still missing, but urgently needed to direct further material improvements. Here a combined experimental and theoretical approach is used to understand the intimate mechanisms by which molecular structure contributes to exciton dissociation, charge separation, and charge recombination at the donor-acceptor (D-A) interface. Model systems comprised of polythiophene-based donor and rylene diimide-based acceptor polymers are used and a detailed density functional theory (DFT) investigation is performed. The results point to the roles that geometric deformations and direct-contact intermolecular polarization play in establishing a driving force ( energy gradient) for the optoelectronic processes taking place at the interface. A substantial impact for this driving force is found to stem from polymer deformations at the interface, a finding that can clearly lead to new design approaches in the development of the next generation of conjugated polymers and small molecules.
KW  - donor-acceptor interfaces
KW  - energy gradients
KW  - geometrical deformations
KW  - nonfullerene acceptors
KW  - organic photovoltaics
KW  - photocurrent generation
KW  - polymer solar cells
Y1  - 2018
U6  - https://doi.org/10.1002/aenm.201702232
SN  - 1614-6832
SN  - 1614-6840
VL  - 8
IS  - 12
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - GEN
A1  - Zeuschner, Steffen Peer
A1  - Parpiiev, Tymur
A1  - Pezeril, Thomas
A1  - Hillion, Arnaud
A1  - Dumesnil, Karine
A1  - Anane, Abdelmadjid
A1  - Pudell, Jan-Etienne
A1  - Willig, Lisa
A1  - Rössle, Matthias
A1  - Herzog, Marc
A1  - Reppert, Alexander von
A1  - Bargheer, Matias
T1  - Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction
T2  - Postprints der Universität Potsdam : Mathematisch-naturwissenschaftliche Reihe
N2  - We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructures. Spatial separation of the Nb detection layer from the laser excitation region allows for a background-free characterization of the laser-generated strain pulses. We clearly observe symmetric bipolar strain pulses if the excited TbFe2 surface terminates the sample and a decomposition of the strain wavepacket into an asymmetric bipolar and a unipolar pulse, if a SiO2 glass capping layer covers the excited TbFe2 layer. The inverse magnetostriction of the temporally separated unipolar strain pulses in this sample leads to a MOKE signal that linearly depends on the strain pulse amplitude measured through UXRD. Linear chain model simulations accurately predict the timing and shape of UXRD and MOKE signals that are caused by the strain reflections from multiple interfaces in the heterostructure.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 706 
KW  - Heterostructures
KW  - Magnetooptical effects
KW  - Metal oxides
KW  - Crystal lattices
KW  - Transition metals
KW  - Magnetism
KW  - Ultrafast X-ray diffraction
KW  - Lasers
KW  - Bragg peak
KW  - Phonons
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-428457
SN  - 1866-8372
IS  - 706
ER  - 
TY  - JOUR
A1  - Heistermann, Maik
A1  - Bogena, Heye
A1  - Francke, Till
A1  - Güntner, Andreas
A1  - Jakobi, Jannis
A1  - Rasche, Daniel
A1  - Schrön, Martin
A1  - Döpper, Veronika
A1  - Fersch, Benjamin
A1  - Groh, Jannis
A1  - Patil, Amol
A1  - Pütz, Thomas
A1  - Reich, Marvin
A1  - Zacharias, Steffen
A1  - Zengerle, Carmen
A1  - Oswald, Sascha
T1  - Soil moisture observation in a forested headwater catchment: combining a dense cosmic-ray neutron sensor network with roving and hydrogravimetry at the TERENO site Wüstebach
JF  - Earth system science data : ESSD
N2  - Cosmic-ray neutron sensing (CRNS) has become an effective method to measure soil moisture at a horizontal scale of hundreds of metres and a depth of decimetres. Recent studies proposed operating CRNS in a network with overlapping footprints in order to cover root-zone water dynamics at the small catchment scale and, at the same time, to represent spatial heterogeneity. In a joint field campaign from September to November 2020 (JFC-2020), five German research institutions deployed 15 CRNS sensors in the 0.4 km2 Wüstebach catchment (Eifel mountains, Germany). The catchment is dominantly forested (but includes a substantial fraction of open vegetation) and features a topographically distinct catchment boundary. In addition to the dense CRNS coverage, the campaign featured a unique combination of additional instruments and techniques: hydro-gravimetry (to detect water storage dynamics also below the root zone); ground-based and, for the first time, airborne CRNS roving; an extensive wireless soil sensor network, supplemented by manual measurements; and six weighable lysimeters. Together with comprehensive data from the long-term local research infrastructure, the published data set (available at https://doi.org/10.23728/b2share.756ca0485800474e9dc7f5949c63b872; Heistermann et al., 2022) will be a valuable asset in various research contexts: to advance the retrieval of landscape water storage from CRNS, wireless soil sensor networks, or hydrogravimetry; to identify scale-specific combinations of sensors and methods to represent soil moisture variability; to improve the understanding and simulation of land–atmosphere exchange as well as hydrological and hydrogeological processes at the hillslope and the catchment scale; and to support the retrieval of soil water content from airborne and spaceborne remote sensing platforms.
Y1  - 2022
U6  - https://doi.org/10.5194/essd-14-2501-2022
SN  - 1866-3516
SN  - 1866-3508
VL  - 14
IS  - 5
SP  - 2501
EP  - 2519
PB  - Copernicus
CY  - Katlenburg-Lindau
ER  -