TY  - JOUR
A1  - Reiche, Jürgen
A1  - Knochenhauer, Gerald
A1  - Dietel, Reinhard
A1  - Freydank, Anke-Christine
A1  - Zetzsche, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
A1  - Barberka, Thomas Andreas
A1  - Geue, Thomas
T1  - Structure of thermally treated oxadiazoleamide Langmuir-Blodgett films
N2  - The thermal treatment of Y-type Langmuir-Blodgett (LB) films formed from the amphiphilic derivative of 2,5- diphenyl-1,3,4-oxadiazole 1 results in changes of the molecular packing. These changes have been analysed by a combination of X-ray specular reflectivity data, X-ray grazing incidence diffraction data and scanning force microscopy images, On the basis of these experimental data we have simulated possible supramolecular structures, These simulations provide insight into the intermolecular interactions giving rise to the observed structural transitions. The crystalline structure induced by thermal treatment of the LB films is characterized by a uniaxial texture, which is correlated with the dipping direction during deposition of the LB film.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Knochenhauer, Gerald
A1  - Barberka, Thomas Andreas
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
A1  - Hodge, P.
A1  - Tredgold, Richard H.
T1  - In-plane structure of perfluorotetra decanoic acid Langmuir-Blodgett films and films formed by vacuum deposition
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Riebe, Daniel
A1  - Eder, Alexander
A1  - Ritschel, Thomas
A1  - Beitz, Toralf
A1  - Löhmannsröben, Hans-Gerd
A1  - Beil, Andreas
A1  - Blaschke, Michael
A1  - Ludwig, Thomas
T1  - Atmospheric pressure chemical ionization of explosives induced by soft X-radiation in ion mobility spectrometry: mass spectrometric investigation of the ionization reactions of drift gasses, dopants and alkyl nitrates
JF  - Journal of mass spectrometr
N2  - A promising replacement for the radioactive sources commonly encountered in ion mobility spectrometers is a miniaturized, energy-efficient photoionization source that produce the reactant ions via soft X-radiation (2.8 keV). In order to successfully apply the photoionization source, it is imperative to know the spectrum of reactant ions and the subsequent ionization reactions leading to the detection of analytes. To that end, an ionization chamber based on the photoionization source that reproduces the ionization processes in the ion mobility spectrometer and facilitates efficient transfer of the product ions into a mass spectrometer was developed. Photoionization of pure gasses and gas mixtures containing air, N-2, CO2 and N2O and the dopant CH2Cl2 is discussed. The main product ions of photoionization are identified and compared with the spectrum of reactant ions formed by radioactive and corona discharge sources on the basis of literature data. The results suggest that photoionization by soft X-radiation in the negative mode is more selective than the other sources. In air, adduct ions of O-2 - with H2O and CO2 were exclusively detected. Traces of CO2 impact the formation of adduct ions of O-2 - and Cl -(upon addition of dopant) and are capable of suppressing them almost completely at high CO2 concentrations. Additionally, the ionization products of four alkyl nitrates (ethylene glycol dinitrate, nitroglycerin, erythritol tetranitrate and pentaerythritol tetranitrate) formed by atmospheric pressure chemical ionization induced by X-ray photoionization in different gasses (air, N-2 and N2O) and dopants (CH2Cl2, C2H5Br and CH3I) are investigated. The experimental studies are complemented by density functional theory calculations of the most important adduct ions of the alkyl nitrates (M) used for their spectrometric identification. In addition to the adduct ions [M + NO3](-) and [M + Cl](-), adduct ions such as [M + N2O2](-), [M + Br](-) and [M+ I](-) were detected, and their gas-phase structures and energetics are investigated by density functional theory calculations. Copyright (C) 2016 John Wiley & Sons, Ltd.
KW  - ion mobility spectrometry
KW  - mass spectrometry
KW  - explosives
KW  - X-ray
KW  - photoionization
KW  - alkyl nitrates
Y1  - 2016
U6  - https://doi.org/10.1002/jms.3784
SN  - 1076-5174
SN  - 1096-9888
VL  - 51
SP  - 566
EP  - 577
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Steinberg, Pablo
A1  - Fischer, Thomas M.
A1  - Kiulies, Sandra
A1  - Biefang, Katja
A1  - Platt, Karl-Ludwig
A1  - Oesch, Franz
A1  - Böttger, Thomas
A1  - Bulitta, Clemens
A1  - Kempf, Peter
A1  - Hengstler, Jan Georg
T1  - Drug metabolizing capacity of cryopreserved human, rat and mouse liver parenchymal cells in suspension
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Straßburger, Martin
A1  - Richter, Wenke
A1  - Sonkajärvi, Hanna
A1  - Kossert, Thomas
A1  - Süß, Karsten
A1  - Kaun, Mario
A1  - Edding, Sarah
A1  - Rischke, Janine
A1  - Kossert, Thomas
A1  - Ludwig, Ulrike
T1  - Militär und Gesellschaft in der Frühen Neuzeit
N2  - Der Arbeitskreis Militär und Gesellschaft in der Frühen Neuzeit e. V. wurde im Frühjahr 1995 gegründet. Er hat es sich zur Aufgabe gemacht, die Erforschung des Militärs im Rahmen der frühneuzeitlichen Geschichte zu befördern und zugleich das Bewusstsein der Frühneuzeit-HistorikerInnen für die Bedeutung des Militärs in all seinen Funktionen zu wecken. Das Militär steht somit als soziale Gruppe selbst im Mittelpunkt der Aktivitäten des Arbeitskreises, wird aber auch in seinen Wirkungen und Repräsentationen thematisiert. Ziel ist es, die Rolle des Militärs als Teil der frühneuzeitlichen Gesellschaft umfassend herauszuarbeiten und zu würdigen. Insofern versteht der AMG seine Arbeit nicht nur als Beitrag zur Militärgeschichte, sondern vor allem als Beitrag zur Geschichte der Frühen Neuzeit insgesamt. Der Arbeitskreis bietet ein Diskussions- und Informations­forum durch die Organisation von Tagungen, die Herausgabe der Schriftenreihe ‚Herrschaft und soziale Systeme in der Frühen Neuzeit‘, die Zeitschrift ‚Militär und Gesellschaft in der Frühen Neuzeit‘ und die Mailingliste mil-fnz.
T3  - Militär und Gesellschaft in der frühen Neuzeit - 13, Heft 2 
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-37726
SN  - 1617-9722
SN  - 1861-910X
VL  - 13
IS  - 2
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Stiller, Burkhard
A1  - Karageorgiev, Peter
A1  - Buchsteiner, Andrea
A1  - Geue, Thomas
A1  - Henneberg, Oliver
A1  - Brehmer, Ludwig
A1  - Natansohn, Almeria
A1  - Hollricher, Olga
T1  - Using light as a tool : optically Induced mass transport generated in Near-Fields
Y1  - 2003
SN  - 0038-7355 -
ER  - 
TY  - JOUR
A1  - Denys, Catherine
A1  - Suzuki, Tadashi
A1  - von Salisch, Markus
A1  - Waack, Linda
A1  - Costa, Rosa
A1  - Bentz, Katrin
A1  - Bütow, Nicole
A1  - Kupka, Thomas
A1  - Kästner, Alexander
A1  - Plassmann, Max
A1  - Ludwig, Ulrike
T1  - Militär und Gesellschaft in der Frühen Neuzeit
N2  - Inhalt: BEITRÄGE Catherine Denys Die Renaissance der Militärgeschichte der frühen Neuzeit in Frankreich. Eine historiographische Bilanz der Jahre 1945-2005 Tadashi Suzuki „Befreiung vom Tabu“: Die japanische Forschung zur europäischen Militärgeschichte seit 1945 PROJEKTE Markus von Salisch Die kursächsische Armee und der Siebenjährige Krieg BERICHTE Linda Waack und Rosa Costa Gewalt und Geschlecht. 12. Fachtagung des Arbeitskreises Geschlechtergeschichte der Frühen Neuzeit (2.-4. 11. 2006, Stuttgart-Hohenheim) Katrin Bentz, Nicole Bütow und Thomas Kupka 1806: Jena, Auerstedt und die Kapitulation von Magdeburg. Schande oder Chance? (13.-15. Oktober 2006, Magdeburg) REZENSIONEN Alexander Kästner Stefan Kroll: Soldaten im 18. Jahrhundert zwischen Friedensalltag und Kriegserfahrung. Lebenswelten und Kultur in der kursächsischen Armee, Paderborn u. a. 2006. Max Plassmann Olaf Jessen: Preußens Napoleon? Ernst von Rüchel (1754-1823). Krieg im Lichte der Vernunft, Paderborn 2006 Ulrike Ludwig Cecilia Nubola, Andreas Würgler (Hrsg.), Bittschriften und Gravamina. Politik, Verwaltung und Justiz in Europa (14.-18. Jahrhundert), Berlin 2005 ANKÜNDIGUNGEN Military Studies - Masterstudiengang Militärgeschichte – Militärsoziologie
T3  - Militär und Gesellschaft in der frühen Neuzeit - 11, Heft 1 
Y1  - 2007
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-15173
SN  - 1617-9722
SN  - 1861-910X
VL  - 11
IS  - 1
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Rath, Brigitte
A1  - Bauer, Gerhard
A1  - Quaas, Gerhard
A1  - Rauchensteiner, Manfried
A1  - Rehm, Christoph
A1  - Tresp, Uwe
A1  - Franz, Matthias
A1  - Gründel, Olaf
A1  - Huck, Stephan
A1  - Schweska, Marc
A1  - Schunka, Alexander
A1  - Simons, Olaf
A1  - Ludwig, Ulrike
A1  - Fuchs, Thomas
A1  - Krebs, Daniel
A1  - Lang, Heiner
T1  - Militär und Gesellschaft in der Frühen Neuzeit
N2  - Aus dem Inhalt dieser Ausgabe: BEITRAG: Brigitte Rath: Zur Repräsentation von Gewalt MUSEEN: Gerhard Bauer: Das Militärwesen der frühen Neuzeit und seine Darstellung in der Dauerausstellung des Militärhistorischen Museums der Bundeswehr in Dresden Gerhard Quaas: Militaria-Sammlung 1: Alte Waffen und Rüstungen Manfried Rauchensteiner: Das Heeresgeschichtliche Museum als Gedächtnisort Christoph Rehm: Das Wehrgeschichtliche Museum Rastatt PROJEKTE: Uwe Tresp: Söldner aus Böhmen. Entstehung und Organisation böhmischer Södnerheere im Dienst deutscher Fürsten des 15. Jahrhunderts Matthias Franz: Die Rekrutierung der sächsischen Regimenter in der Niederlausitz 1726-1781 Olaf Gründel: Zum Verhältnis von Militär- und Zivilbevölkerung in brandenburgischen Städten des 18. Jahrhunderts. Das Beispiel Prenzlau Stephan Huck: Soldaten in Amerika. Sozialgeschichtliche Studie Braunschweiger Truppen im amerikanischen Unabhängigkeitskrieg Marc Schweska: Figuren der Vorstellung. Problematisierung von Macht und Moral in der Frühen Neuzeit Alexander Schunka: Fremde in Sachsen - ein Teilprojekt des Sonderforschungsbereichs "Pluralisierung und Autorität in der Frühen Neuzeit" Olaf Simons: Pierre Marteau's Verlagshaus sucht Kooperationspartner, Beiträge, Ideen für eine Web-Site zum Thema Europas Kriege 1670-1730 REZENSIONEN: Ulrike Ludwig: Rezensionen im Bulletin Militär und Gesellschaft in der Frühen Neuzeit Thomas Fuchs: Militär und ländliche Gesellschaft in der frühen Neuzeit, hrsg. von Stefan Kroll und Kersten Krüger, Hamburg 2000 Daniel Krebs: Stephan Brumwell, Redcoats. The British Soldier and War in the Americas, 1755-1763, Cambridge 2002 Heiner Lang: Claudia Brink, Arte et Marte, München 2000
T3  - Militär und Gesellschaft in der frühen Neuzeit - 6, Heft 1 
KW  - Militär / Geschichte
Y1  - 2002
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-28119
SN  - 1617-9722
SN  - 1861-910X
VL  - 6
IS  - 1
ER  - 
TY  - JOUR
A1  - Lischeid, Gunnar
A1  - Kalettka, Thomas
A1  - Holländer, Matthias
A1  - Steidl, Jörg
A1  - Merz, Christoph
A1  - Dannowski, Ralf
A1  - Hohenbrink, Tobias Ludwig
A1  - Lehr, Christian
A1  - Onandia, Gabriela
A1  - Reverey, Florian
A1  - Pätzig, Marlene
T1  - Natural ponds in an agricultural landscape
BT  - external drivers, internal processes, and the role of the terrestrial-aquatic interface
JF  - Limnologica : ecology and management of inland waters
N2  - The pleistocenic landscape in North Europe, North Asia and North America is spotted with thousands of natural ponds called kettle holes. They are biological and biogeochemical hotspots. Due to small size, small perimeter and shallow depth biological and biogeochemical processes in kettle holes are closely linked to the dynamics and the emissions of the terrestrial environment. On the other hand, their intriguing high spatial and temporal variability makes a sound understanding of the terrestrial-aquatic link very difficult. It is presumed that intensive agricultural land use during the last decades has resulted in a ubiquitous high nutrient load. However, the water quality encountered at single sites highly depends on internal biogeochemical processes and thus can differ substantially even between adjacent sites. This study aimed at elucidating the interplay between external drivers and internal processes based on a thorough analysis of a comprehensive kettle hole water quality data set. To study the role of external drivers, effects of land use in the adjacent terrestrial environment, effects of vegetation at the interface between terrestrial and aquatic systems, and that of kettle hole morphology on water quality was investigated. None of these drivers was prone to strong with-in year variability. Thus temporal variability of spatial patterns could point to the role of internal biogeochemical processes. To that end, the temporal stability of the respective spatial patterns was studied as well for various solutes. All of these analyses were performed for a set of different variables. Different results for different solutes were then used as a source of information about the respective driving processes. In the Quillow catchment in the Uckermark region, about 100 km north of Berlin, Germany, 62 kettle holes have been regularly sampled since 2013. Kettle hole catchments were determined based on a groundwater level map of the uppermost aquifer. The catchments were not clearly related to topography. Spatial patterns of kettle hole water concentration of (earth) alkaline metals and chloride were fairly stable, presumably reflecting solute concentration of the uppermost aquifer. In contrast, spatial patterns of nutrients and redox-sensitive solutes within the kettle holes were hardly correlated between different sampling campaigns. Correspondingly, effects of season, hydrogeomorphic kettle hole type, shore vegetation or land use in the respective catchments were significant but explained only a minor portion of the total variance. It is concluded that internal processes mask effects of the terrestrial environment. There is some evidence that denitrification and phosphorus release from the sediment during frequent periods of hypoxia might play a major role. The latter seems to boost primary production occasionally. These processes do not follow a clear seasonal pattern and are still not well understood.
KW  - Ponds
KW  - Kettle holes
KW  - Water quality
KW  - Land use
KW  - Hydrogeomorphic type
KW  - Shore vegetationa
Y1  - 2018
U6  - https://doi.org/10.1016/j.limno.2017.01.003
SN  - 0075-9511
SN  - 1873-5851
VL  - 68
SP  - 5
EP  - 16
PB  - Elsevier GMBH
CY  - München
ER  - 
TY  - GEN
A1  - Hofreiter, Michael
A1  - Paijmans, Johanna L. A.
A1  - Goodchild, Helen
A1  - Speller, Camilla F.
A1  - Barlow, Axel
A1  - Gonzalez-Fortes, Gloria M.
A1  - Thomas, Jessica A.
A1  - Ludwig, Arne
A1  - Collins, Matthew J.
T1  - The future of ancient DNA
BT  - technical advances and conceptual shifts
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - Technological innovations such as next generation sequencing and DNA hybridisation enrichment have resulted in multi-fold increases in both the quantity of ancient DNA sequence data and the time depth for DNA retrieval. To date, over 30 ancient genomes have been sequenced, moving from 0.7x coverage (mammoth) in 2008 to more than 50x coverage (Neanderthal) in 2014. Studies of rapid evolutionary changes, such as the evolution and spread of pathogens and the genetic responses of hosts, or the genetics of domestication and climatic adaptation, are developing swiftly and the importance of palaeogenomics for investigating evolutionary processes during the last million years is likely to increase considerably. However, these new datasets require new methods of data processing and analysis, as well as conceptual changes in interpreting the results. In this review we highlight important areas of future technical and conceptual progress and discuss research topics in the rapidly growing field of palaeogenomics.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 908 
KW  - ancient DNA
KW  - hybridisation capture
KW  - multi-locus data
KW  - next generation sequencing (NGS)
KW  - palaeogenomics
KW  - population genomics
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-438816
SN  - 1866-8372
IS  - 908
SP  - 284
EP  - 295
ER  - 
TY  - JOUR
A1  - Hofreiter, Michael
A1  - Paijmans, Johanna L. A.
A1  - Goodchild, Helen
A1  - Speller, Camilla F.
A1  - Barlow, Axel
A1  - González-Fortes, Gloria M.
A1  - Thomas, Jessica A.
A1  - Ludwig, Arne
A1  - Collins, Matthew J.
T1  - The future of ancient DNA: Technical advances and conceptual shifts
JF  - Bioessays : ideas that push the boundaries
N2  - Technological innovations such as next generation sequencing and DNA hybridisation enrichment have resulted in multi-fold increases in both the quantity of ancient DNA sequence data and the time depth for DNA retrieval. To date, over 30 ancient genomes have been sequenced, moving from 0.7x coverage (mammoth) in 2008 to more than 50x coverage (Neanderthal) in 2014. Studies of rapid evolutionary changes, such as the evolution and spread of pathogens and the genetic responses of hosts, or the genetics of domestication and climatic adaptation, are developing swiftly and the importance of palaeogenomics for investigating evolutionary processes during the last million years is likely to increase considerably. However, these new datasets require new methods of data processing and analysis, as well as conceptual changes in interpreting the results. In this review we highlight important areas of future technical and conceptual progress and discuss research topics in the rapidly growing field of palaeogenomics.
KW  - ancient DNA
KW  - hybridisation capture
KW  - multi-locus data
KW  - next generation sequencing (NGS)
KW  - palaeogenomics
KW  - population genomics
Y1  - 2015
U6  - https://doi.org/10.1002/bies.201400160
SN  - 0265-9247
SN  - 1521-1878
VL  - 37
IS  - 3
SP  - 284
EP  - 293
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Knochenhauer, Gerald
A1  - Brehmer, Ludwig
T1  - Characterization of crystals based on 1,3,4-oxadiazoles by atomic force microscopy
N2  - The surface structures of crystals based on aromatic oxadiazoles were investigated by AFM. The crystal structure for 2,5-di(p-tolyl)-1,3,4-oxadiazole (DTO) differs from that of 2,5-di (4-methoxycarbonyl-phenyl)-1,3,4- oxadiazole (DMPO). In DMPO all molecules show parallel orientation to the surface in such a way that the surface is formed as well as by the nitrogen atoms of the heterocyclic rings and the methyl groups of the ester substituents. By contrast, the oxadiazole molecules in DTO crystals are oriented perpendicular to the crystal surface. The experimental data are interpreted by molecular modelling. It is shown that there is a difference between molecular structure of the surface, as detected by AFM, and the bulk structure determined by X-ray diffraction.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Zetzsche, Thomas
A1  - Helms, Andreas
A1  - Freydank, Anke-Christine
A1  - Knochenhauer, Gerald
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
T1  - Organized molecular films of oxadiazole compounds formed by vacuum deposition
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Janietz, Dietmar
A1  - Barberka, Thomas Andreas
A1  - Hofmann, Dieter
A1  - Brehmer, Ludwig
T1  - Comprehensive structure investigation of Langmuir-Blodgett films of disc-shaped molecules
N2  - The structure of mono- and multilayers of amphiphilic disc-shaped pentaynes wa inbestigated by Brewsterangle microscopy, X-ray specular reflection and grazing incidence diffraction (GID). X-ray specular reflection experiments confirm the "edge on" arrangement of the molecular discs. The molecular modelling of the Langmuir-Blodgett (LB)- multilayers predicts a columnar in-plane packing of the molecules. A GID experiment with monochromatic synchrotron radiation was used to verify the predicted multilayer structure on molecular level, while the Brewsterangle microscopy gave a deeper insight in the monolayer in-plane structure on micron scale.
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Freydank, A.
A1  - Dietzel, Birgit
A1  - Katholy, Stefan
A1  - Knochenhauer, Gerald
A1  - Zetzsche, Thomas
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
T1  - Komplexe Strukturanalytik von Oxadiazol-Mono- und Multischichten
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Penacorada, Florencio
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - In-plane structure of uranylarachidate multilayers
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Brehmer, Ludwig
A1  - Dietzel, Birgit
A1  - Freydank, Anke-Christine
A1  - Katholy, Stefan
A1  - Knochenhauer, Gerald
A1  - Reiche, Jürgen
A1  - Schulz, Burkhard
A1  - Zetzsche, Thomas
T1  - Langmuir- und Langmuir-Blodgett-Filme amphiphiler Oxadiazole
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Geue, Thomas
A1  - Katholy, Stefan
A1  - Reiche, Jürgen
A1  - Brehmer, Ludwig
A1  - Caliebe, W.
T1  - Grazing incidence x-ray diffraction (GIXD) measurements of uranyl arachidate (UO2A2) LB films
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Dietzel, Birgit
A1  - Freydank, Anke-Christine
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - Lateral structure of thermally treated oxadiazole Langmuir-Blodgett films
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Penacorada, Florencio
A1  - Zetzsche, Thomas
A1  - Katholy, Stefan
A1  - Brehmer, Ludwig
T1  - Polyelektrolyt-Fettsäure-Multiphasen-LB-Schichten
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
A1  - Dietzel, Birgit
A1  - Zetzsche, Thomas
T1  - Preparation and characterization of ordered thin films based on aromatic poly(1,3,4-oxadiazole)s
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Knochenhauer, Gerald
A1  - Dietel, Reinhard
A1  - Brehmer, Ludwig
T1  - Characterization of 2,5-di(p-tolyl-1,3,4- oxadiazole) crystals by IR-spectroscopy and atomic force microscopy
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Uhlemann, Erhard
A1  - Hefele, Heike
A1  - Ludwig, Eberhard
A1  - Banße, Wolfgang
A1  - Lügger, Thomas
A1  - Hahn, Ekkehardt
A1  - Mehner, Hartmut
T1  - Komplexe mit N,N,N',N'-Tetrakis(2-hydroxbenzyl)ethylen-diamin(H4tben) : Kristallstruktur von Ti(tben)
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Knochenhauer, Gerald
A1  - Reiche, Jürgen
A1  - Barberka, Thomas Andreas
A1  - Woolley, Martin
A1  - Tredgold, Richard H.
A1  - Hodge, P.
A1  - Brehmer, Ludwig
T1  - Do perfluorianted chains always have to be twisted?
N2  - Short perfluorinated cabon chains do not take on helical structure when they are closely packed
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Dietzel, Birgit
A1  - Freydank, A.
A1  - Reiche, Jürgen
A1  - Brehmer, Ludwig
A1  - Knoblauch, H.
A1  - Knochenhauer, Gerald
A1  - Zetzsche, Thomas
T1  - Mono- und Multischichten von neuen aromatischen 1,3,4-Oxadiazolen
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Penacorada, Florencio
A1  - Dietel, Reinhard
A1  - Reiche, Jürgen
A1  - Zetzsche, Thomas
A1  - Knobloch, Harald
A1  - Katholy, Stefan
A1  - Brehmer, Ludwig
T1  - Studium des Einflusses von Uranyl-Gegenionen auf die Struktur von Langmuir- und Langmuir-Blodgett Filmen der Arachinsäure
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Barberka, Thomas Andreas
A1  - Janietz, Dietmar
A1  - Hofmann, Dieter
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - X-ray structure investigation and computer modelling of Langmuir-Blodgett films formed from disc-shaped pentaalkines
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Angelova, Angelina
A1  - Penacorada, Florencio
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Ionov, Radoslav
A1  - Kamusewitz, Helmut
A1  - Brehmer, Ludwig
T1  - Wettability, surface morphology and stability of long chain ester multilayers obtained by different Langmuir- Blodgett deposition type
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Schulz, Burkhard
A1  - Stiller, Burkhard
A1  - Zetzsche, Thomas
A1  - Knochenhauer, Gerald
A1  - Dietel, Reinhard
A1  - Brehmer, Ludwig
T1  - Crystal structure of 2,5-Di(4- methoxycarbonyl-phenyl)-1,3,4-oxadiazole characterized by AFM and IR- spectroscopy
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Anklam, Elke
A1  - Behler, Jörg
A1  - Dingermann, Theodor
A1  - Elsinghorst, Paul
A1  - Fischer, Jochen
A1  - Esselen, Melanie
A1  - Foerster, Christian
A1  - Fröhlich, Daniel
A1  - Goedel, Werner Andreas
A1  - Gregory, Peter
A1  - Grimme, Stefan
A1  - Hackenberger, Christian
A1  - Hansmann, Max
A1  - Heppekausen, Johannes
A1  - Hasenstab-Riedel, Sebastian
A1  - Kirchhoff, Erhard
A1  - Kratz, Karl-Ludwig
A1  - Krausz, Ferenc
A1  - Linker, Torsten
A1  - List, Benjamin
A1  - Ray, Kallol
A1  - Salzer, Reiner
A1  - Schubert, Ulrich
A1  - Schueth, Ferdi
A1  - Schwarz, Helmut
A1  - Schwietzke, Uta
A1  - Strey, Reinhard
A1  - Stumpf, Thorsten
A1  - Vaagt, Franziska
A1  - Volodkin, Dmitry
A1  - Wilke, Guenther
A1  - Zass, Engelbert
A1  - Zemb, Thomas
T1  - Awards
JF  - Nachrichten aus der Chemie : Zeitschrift der Gesellschaft Deutscher Chemiker
Y1  - 2013
U6  - https://doi.org/10.1002/nadc.201390372
SN  - 1439-9598
SN  - 1868-0054
VL  - 61
IS  - 11
SP  - 1145
EP  - 1148
PB  - Ges. Dt. Chemiker
CY  - Frankfurt, Main
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Penacorada, Florencio
A1  - Geue, Thomas
A1  - Pietsch, Ullrich
A1  - Brehmer, Ludwig
T1  - Monolayers and multilayers of uranyl arachidate : in-plane structure of uranyl arachidate multilayers
N2  - The molecular in-plane structure of uranyl arachidate Langmuir-Blodgett (LB) films formed at different subphase pH values was analysed by means of X-ray grazing-incidence diffraction. For multilayers formed at low subphase pH a reorganisation of the arachidic acid film structure is confirmed. At appropriate subphase pH values, reorganisation of the film structure, e.g. via the formation of three-dimensional crystallites, is prevented by the presence of the uranyl ions and by the subsequent introduction of conformational disorder (gauche defects) in the alkyl chains. The observation of a macroscopic flow-induced in-plane texture in these uranyl arachidate LB films has profound implications for the design of ordered, supramolecular structures by the Langmuir-Blodgett technique.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Penacorada, Florencio
A1  - Reiche, Jürgen
A1  - Zetzsche, Thomas
A1  - Dietel, Reinhard
A1  - Brehmer, Ludwig
A1  - Saja, Jose-Antonio de
T1  - Stabilisation of fatty acid mono- and multilayers by simultaneous polyelectrolyte complexation and salt formation with cadmium ions
N2  - The complexation of highly ordered fatty acid monolayers with polyelectrolytes is expected to yield well- ordered Langmuir films suitable for the formation of Langmuir-Blodgett multilayers with improved long-term stability. Studies of the surface pressure-area isotherms and of the surface potential kinetics yield detailed information regarding the influence of these polymeric counterions on the monolayer properties. The injection of bivalent metal salts into the subphase after the complexation was used to improve the order and stability of the mono- and multilayers. The corresponding Langmuir-Blodgett films were investigated by means of X-ray reflectivity measurements and scanning force microscopy. The polyion complex multilayers show a strongly increased mechanical stability compared with films of fatty acid salts formed with bivalent metal ions. These structures are expected to be suitable as ultrathin separation layer for gas separation or ultrafiltration membranes.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Schulz, Burkhard
A1  - Knochenhauer, Gerald
A1  - Dietzel, Birgit
A1  - Freydank, Anke-Christine
A1  - Zetzsche, Thomas
A1  - Brehmer, Ludwig
T1  - Supramolecular structures formed from heterocyclic aromatic molecules
N2  - This paper describes the formation and structure investigation of Langmuir monolayers and Langmuir-Blodgett multilayers formed from amphiphilic derivatives of 2,5-diphenyl-1,3,4-oxadiazole. The 2,5-diphenyl-1,3,4-oxadiazole group as a functional unit with interesting physical and chemical properties is maintained, while the head group, the length of the alkyl chain and the structure of the coupling unit between aromatic and aliphatic part of these linear short-chain amphiphiles is systematically varied in order to explore the influence of this change on the film forming properties and the stability of Langmuir and Langmuir-Blodgett films. Molecular mechanics simulations are shown by these systematic variations to be suitable for the prediction of optimal chemical structures allowing for a stable stratified molecular packing. The combination of a detailed structure investigation of the multilayers based on scanning force microscopy and X-ray data with molecular mechanics simulations yields an insight into the packing of the molecules and the intermolecular interactions.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Penacorada, Florencio
A1  - Reiche, Jürgen
A1  - Dietel, Reinhard
A1  - Zetzsche, Thomas
A1  - Stiller, Burkhard
A1  - Knobloch, Harald
A1  - Brehmer, Ludwig
T1  - Monolayers and multilayers of uranyl arachidate : 2. Influence of the subphase pH on the structure and stability of Langmuir-Blodgett films
N2  - In this second paper we describe the comprehensive structure investigations on multilayers of uranyl arachidate formed by Langmuir-Blodgett deposition from subphases of different pH on solid substrates by means of a combination of infrared spectroscopy, X-ray specular reflection, ellipsometry, and scanning force microscopy, The structure of these multilayers and their stability are obviously influenced by the subphase pH. The pH range of the acid to salt conversion determined for the Langmuir films is confirmed by the infrared spectroscopic data of the multilayers. While arachidic acid films, deposited from an uranyl acetate subphase of low pH, are found to have strongly distorted rough surface, the films of uranyl structure, The influence of the counterions on the alkyl chain conformation, chain packing, reorganization probability, and stability of the multilayer is discussed.
Y1  - 1996
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  - Kossert, Thomas
A1  - Zirr, Alexander
A1  - Richter, Wenke
A1  - Schönauer, Tobias
A1  - Langer, Herbert
A1  - Häcker, Susanne
A1  - Füssel, Marian
A1  - Asche, Matthias
A1  - Bröchler, Anja
A1  - Oldach, Robert
A1  - Kloosterhuis, Jürgen
A1  - Pröve, Ralf
A1  - Ludwig, Ulrike
A1  - Rischke, Janine
A1  - Theilig, Stephan
ED  - Kossert, Thomas
T1  - Militär und Gesellschaft in der Frühen Neuzeit = Themenheft: Universitäten im Dreißigjährigen Krieg
N2  - Die Geschichte der deutschen Universitäten in der Zeit des Dreißigjährigen Krieges gehört traditionell nicht zu den bevorzugten Themen der historischen Forschung – weder der universitäts-, noch der militärgeschichtlichen. Dieses ausgesprochene Desiderat hat spezifisch historiographiegeschichtliche Gründe und ist noch heute für viele Verzerrungen und Einseitigkeiten bei der Darstellung dieser für das deutsche Universitätswesen durchaus zäsurhaften Epoche verantwortlich. Die in diesem Heft präsentierten exemplarischen Studien gehen auf Vorträge eines Workshops des Arbeitskreises Militär und Gesellschaft in der Frühen Neuzeit auf Schloss Friedenstein in Gotha im Mai 2010 zurück und verstehen sich als eine erste Annäherung an ein noch weithin offenes, aber keineswegs ausgeschöpftes Forschungsfeld.
T3  - Militär und Gesellschaft in der frühen Neuzeit - 15, Heft 1 
Y1  - 2011
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-53892
SN  - 978-3-86956-152-3
SN  - 1617-9722
SN  - 1861-910X
VL  - 15
IS  - 1
PB  - Universitätsverlag Potsdam
CY  - Potsdam
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  - Friedl, Christian
A1  - Renger, Thomas
A1  - Berlepsch, Hans V.
A1  - Ludwig, Kai
A1  - Schmidt am Busch, Marcel
A1  - Megow, Jörg
T1  - Structure Prediction of Self-Assembled Dye Aggregates from Cryogenic Transmission Electron Microscopy, Molecular Mechanics, and Theory of Optical Spectra
JF  - The journal of physical chemistry : C, Nanomaterials and interfaces
N2  - Cryogenic transmission electron microscopy (cryo-TEM) studies suggest that TTBC molecules self-assemble in aqueous solution to form single-walled tubes with a diameter of about 35 A. In order to reveal the arrangement and mutual orientations of the individual molecules in the tube, we combine information from crystal structure data of this dye with a calculation of linear absorbance and linear dichroism spectra and molecular dynamics simulations. We start with wrapping crystal planes in different directions to obtain tubes of suitable diameter. This set of tube models is evaluated by comparing the resulting optical spectra with experimental data. The tubes that can explain the spectra are investigated further by molecular dynamics simulations, including explicit solvent molecules. From the trajectories of the most stable tube models, the short-range ordering of the dye molecules is extracted and the optimization of the structure is iteratively completed. The final structural model is a tube of rings with 6-fold rotational symmetry, where neighboring rings are rotated by 30 and the-transition dipole moments of the chromophores form an angle of 74 with respect to the symmetry axis of the tube. This model is in agreement with cryo-TEM images and can explain the optical spectra, consisting of a sharp red-shifted J-band that is polarized parallel to to the symmetry axis of the tube and a broad blue-shifted H-band polarized perpendicular to this axis. The general structure of the homogeneous spectrum of this hybrid HJ-aggregate is described by an analytical model that explains the difference in redistribution of oscillator strength inside the vibrational manifolds of the J- and H-bands and the relative intensities and excitation energies of those bands. In addition to the-particular system investigated here, the present methodology can be expected to aid the structure prediction for a wide range of self-assembled dye aggregates.
Y1  - 2016
U6  - https://doi.org/10.1021/acs.jpcc.6b05856
SN  - 1932-7447
VL  - 120
SP  - 19416
EP  - 19433
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - JOUR
A1  - Hengstler, Jan Georg
A1  - Ringel, M.
A1  - Biefang, Katja
A1  - Hammel, S.
A1  - Milbert, U.
A1  - Gerl, M.
A1  - Klebach, M.
A1  - Diener, B.
A1  - Platt, Karl-Ludwig
A1  - Böttger, Thomas
A1  - Steinberg, Pablo
A1  - Oesch, Franz
T1  - Cultures with cryopreserved hepatocytes : applicability for studies of enzyme induction
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Stiller, Burkhard
A1  - Köpnick, Thomas
A1  - Muzikante, I.
A1  - Neilands, O.
A1  - Utinans, M.
A1  - Dubrovich, O.
A1  - Karageorgiev, Peter
A1  - Brehmer, Ludwig
T1  - Optically induced switching effect of polymer containing indandione-1,3-pyridinium betaine side chains
Y1  - 1999
SN  - 0378-2271
ER  - 
TY  - JOUR
A1  - Reiche, Jürgen
A1  - Freydank, Anke-Christine
A1  - Helms, Andreas
A1  - Geue, Thomas
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
A1  - Stiller, Burkhard
A1  - Knochenhauer, Gerald
T1  - Vacuum deposition films of oxadiazole compounds : formation and structure investigation
N2  - The search for alternative routes of organic thin film formation is stimulated by the outstanding properties of these films in such fields as nonlinear optics, photonic data processing and molecular electronics. The formation of highly ordered multilayer structures by thermal vacuum deposition (VD) of organic compounds is an essential step toward the application of supramolecular organic architectures in technical systems. The VD of an amphiphilic substituted 2,5- diphenylene-1,3,4-oxadiazole 1 onto silicon substrates at defined temperature was used for the formation of ultrathin films. The structural data obtained for the VD-films of oxadiazole 1 by means of X-ray reflectivity, X-ray grazing incidence diffraction and atomic force microscopy (AFM) investigations indicate the formation of well ordered oxadiazole multilayers. The structure of the VD-multilayers is compared with that of Langmuir-Blodgett (LB) films and thermally treated LB-multilayers prepared from the same compound.
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Knochenhauer, Gerald
A1  - Penacorada, Florencio
A1  - Reiche, Jürgen
A1  - Brehmer, Ludwig
A1  - Tredgold, Richard H.
A1  - Barberka, Thomas Andreas
T1  - Multilayers of perfluorinated fatty acids
N2  - We have formed Y layers of perfluorododecanoic acid CF3(CF2)10COOH by thermal evaporation in vacuo and of perfluorotetradecanoic acid CF3(CF2)12COOH by thermal evaporation and by the Langmuir-Blodgett (LB) technique. We have obtained the bilayer spacing of both these materials by X-ray diffraction and have also studied the in-plane structure of these materials by means of grazing incidence diffraction (GID). Computer modelling was used to interpret the results obtained. For the perfluorododecanoic acid, we find two stable untwisted phases at 25°C and a combination of these two predicts both the Bragg peaks arising from the layer structure and the GID results. Our experimental results show that the perfluorotetradecanoic acid exists in the generally accepted helical structure. Computer modelling leads to the conclusion that closely packed perfluorinated chains with 12 or less carbon atoms should exist in an untwisted state while molecules having more than 12 carbon atoms show the onset of the helical conformation.
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Uhlemann, Erhard
A1  - Banße, Wolfgang
A1  - Ludwig, Eberhard
A1  - Mickler, Wulfhard
A1  - Hahn, Ekkehardt
A1  - Lügger, Thomas
A1  - Lehmann, Andreas
T1  - Mangan(IV)-Komplexe mit dreizähnigen diaciden Liganden : Kristallstruktur von Acetylacetonato- salicylaldehyd-benzoylhydrazonato(2-methanol-mangan(III)
Y1  - 1995
ER  -