@article{SchweigertRailaEisenachetal.1997, author = {Schweigert, Florian J. and Raila, Jens and Eisenach, C. and Buchholz, Ingeborg}, title = {Distribution of vitamin A and retinol-binding-protein (RBP) in plasma, urine and various tissues of canines}, year = {1997}, language = {en} } @misc{Tristram1997, author = {Tristram, Hildegard L. C.}, title = {Annotated Bibliography of English Studies (ABES), vol. 109: The Celtic Englishes}, year = {1997}, abstract = {This file contains 200 bibliographical entries on the most important publications in the field of the 'Celtic Englishes' with full summary of contents and classification of the varieties concerned (Irish English, Scottish English, Manx English, Welsh English, and Cornu-English).}, language = {en} } @article{BeckmannTrudewind1997, author = {Beckmann, J{\"u}rgen and Trudewind, C.}, title = {A functional-analytic perspective on affect and motivation}, year = {1997}, language = {en} } @article{MeyreCapitaniPartzsch1997, author = {Meyre, C. and Capitani, C. de and Partzsch, Julius}, title = {A ternary soild solution model for omphacite and its application to geothermobarometry of eclogites from the Middle Adula nappe (Central Alps, Switzerland)}, year = {1997}, language = {en} } @article{RailaEisenachBuchholzetal.1997, author = {Raila, Jens and Eisenach, C. and Buchholz, Ingeborg and Schweigert, Florian J.}, title = {Distribution of vitamin A and retinol-binding-protein (RBP) in various tissue of dogs and reccoon dogs}, year = {1997}, language = {en} } @book{Tristram1997, author = {Tristram, Hildegard L. C.}, title = {The Arnold Anthology of British and Irish literatures in English}, editor = {Clark, Robert and Healy, Thomas}, publisher = {Arnold}, address = {London}, pages = {1578 S.}, year = {1997}, abstract = {My editorial contribution to this anthology consisted in the cooperative selection and preparation of the literary entries for the medieval period.}, language = {en} } @article{Tristram1997, author = {Tristram, Hildegard L. C.}, title = {"List of Published Research on the Celts Produced at the German Speaking Universities between 1980 and 1995"}, year = {1997}, abstract = {At the suggestion of the then editor of 'Studia Celtica Japonica,' Professor Toshio Doi, this bibliography lists the returns of a questionnaire sent to all scholars in Germany who were actively involved in Celtic Studies between 1980 and 1995. They were asked to list all their publications in the field of Celtic Studies, so as to allow to carry out a survey of their research activities during this period. While most scholars kindly obliged by returning their lists, there were notable exceptions who never answered the query. Regretably, the present bibliography therefore contains important gaps, which, however, may be quite telling as far as the research situation in Germany was concerned during that period.}, language = {en} } @article{Tristram1997, author = {Tristram, Hildegard L. C.}, title = {What's the Point of Dating Beowulf?}, isbn = {3-8233-5407-8}, year = {1997}, abstract = {The great Old English epic 'Beowulf' has been dated to practically every century between the 6th and the 11th century, depending on the criteria of dating adopted and the approaches advocated by the respective scholars. As the text successfully avoids to provide definite cues or evidence for a definitive date, these scholarly attempts reveal more about the respective scholars' research interests than offering uncontroversial dates. The point of dating 'Beowulf' then seems to provide scholars with the opportunity to anchor their own personal understanding of the poem within the century of their own personal predilection.}, language = {en} } @article{Tristram1997, author = {Tristram, Hildegard L. C.}, title = {DO in Contact?}, isbn = {3-515-07041-9}, year = {1997}, abstract = {Periphrastic English constructions involving the verbs BE/HAVE + a nominalised verb form expressing [+imperfectivity] and [+perfectivity] have close analogues in the Insular Celtic languages, where Celtic analogues of the English verb BE + a prepositional construction marker + Verbal Noun are used. The two constructions in English and teh Celtic languages are not identical and cannot be so, because the Celtic languages do not feature present and past participles and English has no verbal nouns. But the two types of the periphrastic mode of expressing aspect are close enough to suggest either a shift scenario, a borrowing scenario and/or an areal spread by diffusion over a long period of time. Since Old English did not mark aspect, neither morphologically nor syntactically, but Old Welsh and Old Irish already did so syntactically, it is suggested here that a unilateral transfer process was involved here, which proceeded from the Celtic languages to the English language. Aspectual transfer is even more pronounced in the so-called 'Celtic Englishes,' where in addition to the periphrastic marking of [+ imperfectivity] and [+perfectivity] the marking of [+habituality] is a grammaticalised feature and is periphrastically expressed.}, language = {en} } @article{MugishaEbingerStreckeretal.1997, author = {Mugisha, F. and Ebinger, C. and Strecker, Manfred and Pope, D.}, title = {Two-stage rifting in the Kenya Rift : implications for half-graben models}, year = {1997}, language = {en} } @article{KleinpeterKochFischeretal.1997, author = {Kleinpeter, Erich and Koch, Andreas and Fischer, G. and Askolin, C.-P.}, title = {13 C NMR, 15 N NMR and quantum-chemical study of the tautomerism of 2-substituted 5-ME-7-OH-1,2,4-triazolo[1,5- a]pyrimidines}, year = {1997}, language = {en} } @unpublished{LiperovskyPochotelovLiperovskayaetal.1998, author = {Liperovsky, V.A. and Pochotelov, O.A. and Liperovskaya, E.V. and Parrot, M. and Meister, C.-V. and Alimov, O. A.}, title = {Modifications of sporadic E-layers caused by seismic activity}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14799}, year = {1998}, abstract = {Contents: 1 Introduction 2 Formation and destruction of sporadic E-layers 3 Temporal variations of parameters of sporadic E-layers during earthquake preparation 3.1 Temporal variations of fbEs with time-scales of a few hours 3.2 Study of fbEs variations with characteristic time-scales of 0.5-3 hours 3.3 Variations of the parameters of sporadic E-layers with characteristic time-scales of 15-45 minutes 3.4 Sporadic E-layer variations with characteristic time-scales of 2-15 minutes 4 On the spatial scales of sporadic E-layer disturbances related to seismic activity 5 Complex experimental researches of the ionosphere, electromagnetic noise and the geomagnetic field 5.1 Ionospheric and electromagnetic phenomena of the Kayraccum earthquake in 1985 5.2 Comparison of anomalies with characteristic time-scales of 2-3 hours for ionospheric E- and F-layers, and temporal behaviour of electromagnetic noise emission intensity 5.3 Night airglow emissions in the E-region before earthquakes and sporadic E-layer variations 6 Physical models of lithosphere-ionosphere links 6.1 Lithosphere-ionosphere links due to AGW 6.2 Electromagnetic models for the lithosphere-ionosphere coupling 6.3 Sporadic E-layers as current generators 7 Discussion and conclusion}, language = {en} } @article{WestbrookHenkelWestbrooketal.1998, author = {Westbrook, N. and Henkel, Carsten and Westbrook, C. I. and Landragin, A. and Labeyrie, G. and Cognet, L. and Savalli, V. and Horvath, G. and Aspect, Alain and Moelmer, Klaus and Courtois, J.-Y. and Phillips, W. D. and Kaiser, Rolf and Bagnato, V.}, title = {New physics with evanescent wave atomic mirrors : the van der Waals force and atomic diffraction}, year = {1998}, abstract = {After a brief introduction to the field of atom optics and to atomic mirrors, we present experimental results obtained in our group during the last two years while studying the reflection of rubidium atoms by an evanescent wave. These involve the first measurement of the van der Waals force between an atom in its ground state and a dielectric wall, as well as the demonstration of a reflection grating for atoms at normal incidence. We also consider the influence of quantum reflection and tunnelling phenomena. Further studies using the atomic mirror as a probe of the van der Waals interaction, and of very small surface roughness are briefly discussed.}, language = {en} } @article{GoldmannMahlstedtJanietzetal.1998, author = {Goldmann, Daniela and Mahlstedt, S. and Janietz, Dietmar and Busch, P. and Schmidt, C. and Stracke, A. and Wendorff, Joachim Heinz}, title = {Mesomorphic donor-acceptor twin molecules with covalently linked sheet-like pentaalkyne and nitrofluorenone subunits}, year = {1998}, language = {en} } @article{GoldmannJanietzSchmidtetal.1998, author = {Goldmann, Daniela and Janietz, Dietmar and Schmidt, C. and Wendorff, Joachim Heinz}, title = {Liquid crystalline 1,3,5-triazines incorporating rod-like azobenzene sub-units}, year = {1998}, language = {en} } @article{PenaStastinskaEstebanetal.1998, author = {Pena, M. and Stastinska, G. and Esteban, C. and Koesterke, Lars and Medina, S. and Kingsburgh, R.}, title = {Galactic planetary nebulae with Wolf-Rayet nuclei : I. Objects with [WC]-early type stars}, year = {1998}, language = {en} } @article{SpeelVanDerVenAlbrechtsetal.1998, author = {Speel, Ernst J. M. and VanDerVen, Peter F. M. and Albrechts, Jozefa C. M. and Hopman, Anton H. N. and F{\"u}rst, Dieter Oswald}, title = {Chromosomal assignment of the human myomesin gene}, year = {1998}, language = {en} } @article{GoldmannDietelJanietzetal.1998, author = {Goldmann, Daniela and Dietel, Reinhard and Janietz, Dietmar and Schmidt, C. and Wendorff, Joachim Heinz}, title = {Sheet-shaped mesogens based on 1,3,5-Triazines : variation of columnar mesophases through intermolecular hydrogen bonding}, year = {1998}, language = {en} } @article{RosenblumPengIvanovetal.1998, author = {Rosenblum, Michael and Peng, C. K. and Ivanov, Plamen Ch. and Mietus, J. and Havlin, Shlomo and Stanley, H. Eugene and Goldberger, Ary L.}, title = {Scaling and universality in heart rate variability distributions}, year = {1998}, language = {en} } @article{SaparinHuppertStoneetal.1998, author = {Saparin, Peter and Huppert, Amit and Stone, L. and Price, C.}, title = {El ni{\~n}o chaos : The role of noise and stochastic resonance on the ENSO cycle}, year = {1998}, language = {en} } @article{KamphausenStumpe1998, author = {Kamphausen, C. and Stumpe, Joachim}, title = {Photoreactions of N-Salycylidenaniles in Glassy PMMA films.}, year = {1998}, language = {en} } @article{SpeelVanDerVenAlbrechtsetal.1998, author = {Speel, Ernst J. M. and VanDerVen, Peter F. M. and Albrechts, Jozefa C. M. and Ramaekers, Frans C. S. and F{\"u}rst, Dieter Oswald and Hopman, Anton H. N.}, title = {Assignment of the human gene for the sarcomeric M-band protein myomesin (MYOM1) to 18p11.31-p11.32}, year = {1998}, language = {en} } @article{HaeseGaedkeBeeseetal.1998, author = {H{\"a}se, C. and Gaedke, Ursula and Beese, B. and Seifried, A. and Tilzer, M.}, title = {Phytoplankton response to reoligotrophication in large and deep Lake Constance : Photosynthetic activity and chlorophyll concentration}, year = {1998}, abstract = {In Lake Constance, phytoplankton productivity, together with parameters relevant for the production process, was assessed year-round at about 500 dates between 1980 and 1995/1996. During this period, the concentration of total phosphorus during winter circulation decreased from more than 80 to 22 ;g/l as a consequence of sewage diversion and waste water treatment within the catchment area. By contrast, annual photosynthetic rates remained virtually unchanged for about 10 more years following phosphorus decline (mean value 288 " 21 g C m-2 a-1), and thereafter decreased only by about 25 \% until 1996. The aim of this study is to analyze factors responsible for this pronounced resilience.}, language = {en} } @article{WittFeudelGebogietal.1998, author = {Witt, Annette and Feudel, Fred and Gebogi, C. and Kurths, J{\"u}rgen and Braun, Robert}, title = {Tracer dynamics in a flow of driven vortices}, series = {Preprint NLD}, volume = {51}, journal = {Preprint NLD}, publisher = {Univ.}, address = {Potsdam}, issn = {1432-2935}, pages = {8 S. : graph. Darst.}, year = {1998}, language = {en} } @article{Tristram1998, author = {Tristram, Hildegard L. C.}, title = {Rudolf Thurneysen (1857 - 1940) : a biographical essay}, year = {1998}, language = {en} } @article{BirtelAltenbergerPasschier1998, author = {Birtel, Sandra and Altenberger, Uwe and Passchier, C. W.}, title = {Polyphase structural and metamorphic evolution of the Rossland shear zone at Holsnoy island, a ductile nappe boundary in the Middle Allochthon of the Norwegian Caledonides}, year = {1998}, language = {en} } @article{StoemmerMartinGeueetal.1998, author = {St{\"o}mmer, Ralph and Martin, C. R. and Geue, Thomas and G{\"o}bel, H. and Hub, W. and Pietsch, Ullrich}, title = {Comparative studies of fractal parameters of Si(100) surfaces measured by X-ray scattering and atomic force microscopy}, year = {1998}, language = {en} } @article{RosenblumKurthsPikovskijetal.1998, author = {Rosenblum, Michael and Kurths, J{\"u}rgen and Pikovskij, Arkadij and Schafer, C. and Tass, Peter and Abel, Hans-Henning}, title = {Synchronization in Noisy Systems and Cardiorespiratory Interaction}, year = {1998}, language = {en} } @article{KoesslMoraCoroetal.1999, author = {K{\"o}ssl, Manfred and Mora, Emanuel C. and Coro, Frank and Vater, Marianne}, title = {Two-toned echolocation calls from Molossus molossus in Cuba.}, issn = {0022-2372}, year = {1999}, language = {en} } @article{BrownCanfieldFieldetal.1999, author = {Brown, M. R. and Canfield, R. C. and Field, G. and Kulsrud, R. and Pevtsov, A. A. and Rosner, R. and Seehafer, Norbert}, title = {Magnetic helicity in space and laboratory plasmas: Editorial summary}, year = {1999}, language = {en} } @article{AvilovKulyginPietschetal.1999, author = {Avilov, Anatoly S. and Kulygin, Alexander K. and Pietsch, Ullrich and Spence, John C. H. and Tsirelson, Vladimir G. and Zuo, Ming J.}, title = {Scanning system for high-energy electron diffractometry}, issn = {0021-8898}, doi = {10.1107/S0021889899006755}, year = {1999}, language = {en} } @article{LetzelSynstadEijsinketal.1999, author = {Letzel, Matthias C. and Synstad, Bjoenar and Eijsink, Vincent G. H. and Peter-Katalinic, Jasna and Peter, Martin G.}, title = {Libraries of chito-oligosaccharides of mixed acetylation patterns and their interactions with chitinases}, isbn = {3-9806494-5-8}, year = {1999}, language = {en} } @article{SchultheissCampbellMcClelland1999, author = {Schultheiss, Oliver and Campbell, Kenneth L. and McClelland, David C.}, title = {Implicit power motivation moderates men{\"i}s testosteron responses to imagined and real dominance successes}, year = {1999}, language = {en} } @article{CampbellSchultheissMcClelland1999, author = {Campbell, Kenneth L. and Schultheiss, Oliver and McClelland, David C.}, title = {A necessary adjustment of protocol for use of DPC Coat-a-Count Total Testosterone assay with saliva}, year = {1999}, language = {en} } @article{Tristram1999, author = {Tristram, Hildegard L. C.}, title = {Mimesis and diegesis in "The Cattle Raid of Cuailnge"}, year = {1999}, language = {en} } @article{MikatOrgzallLorenzetal.1999, author = {Mikat, J{\"u}rgen E. R. and Orgzall, Ingo and Lorenz, Bernd and Sapp, S. and Martin, C. R. and Burris, J. L. and Hochheimer, H. D.}, title = {High-pressure low-temperature electrical properties of template-synthesied polypyrrole at low synthesis temperature: Dimensional crossover under pressure}, year = {1999}, language = {en} } @article{VanDerVenSpeelAlbrechtsetal.1999, author = {VanDerVen, Peter F. M. and Speel, Ernst J. M. and Albrechts, Jozefa C. M. and Ramaekers, Frans C. S. and Hopman, Anton H. N. and F{\"u}rst, Dieter Oswald}, title = {Chromosomal assignment of the human gene for endosarcomeric cytoskeletal M-protein (MYOM2) to 8p23.3}, year = {1999}, language = {en} } @article{BeigeHegerfeldt1999, author = {Beige, Almut and Hegerfeldt, G. C.}, title = {Cooperative effects in the light and dark periods of two dipole-interacting atoms}, year = {1999}, abstract = {If an atom is able to exhibit macroscopic dark periods, or electron shelving, then a driven system of tow atoms has three types of these fluorescence types as a simple and easily accessible indivator of cooperative effects. As an examble, we study two dipole-interacting V systems by simulation techniques. We show that the durations of the two types of light periods exhibit marked sepatation-dependent oscillations and that they vary in phase with the real part of the dipole-dipole coupling constant.}, language = {en} } @article{SchraderVismantsDietzeletal.1999, author = {Schrader, Sigurd and Vismants, Z. and Dietzel, Birgit and Flueraru, C. and Prescher, Dietrich and Reiche, J{\"u}rgen and Motschmann, H. and Brehmer, Ludwig}, title = {Linear and nonlinear optical properties of Langmuir-Blodgett multilayers from chromophore-containing maleic acid anhydride polymers}, year = {1999}, language = {en} } @article{Tristram1999, author = {Tristram, Hildegard L. C.}, title = {The Cattle-raid of Cuailnge between the oral and the written : a research report (SFB 321, Project A 5, 1986, 1996)}, year = {1999}, language = {en} } @article{BauerKuehnGajovicetal.1999, author = {Bauer, Christian G. and K{\"u}hn, A. and Gajovic, Nenad and Skorobogatko, O. V. and Holt, P. J. and Bruce, N. C. and Makower, Alexander and Lowe, Ch. R. and Scheller, Frieder W.}, title = {New enzymen sensors for morphine and codeine based on morphine dehydrogenase and laccase}, year = {1999}, language = {en} } @article{SchweigertGottwald1999, author = {Schweigert, Florian J. and Gottwald, C.}, title = {Effect of parturition on levels of vitamins A and E and of ß-carotene in plasma and milk of mares}, year = {1999}, language = {en} } @article{VanDerVenSpeelAlbrechtsetal.1999, author = {VanDerVen, Peter F. M. and Speel, Ernst J. M. and Albrechts, Jozefa C. M. and Ramaekers, Frans C. S. and Hopman, Anton H. N. and F{\"u}rst, Dieter Oswald}, title = {Assignment of the human gene for endosarcomeric cytoskeletal M-protein (MYOM2) to 8p23.3}, year = {1999}, language = {en} } @article{HulbertNotaClampinetal.1999, author = {Hulbert, S. and Nota, A. and Clampin, M. and Leitherer, C. and Pasquali, A. and Langer, Norbert and Schulte-Ladbeck, R. E.}, title = {HST WEPCII observation of the inner HR car nebula}, year = {1999}, language = {en} } @article{PenaStastinskaEstebanetal.1999, author = {Pena, M. and Stastinska, G. and Esteban, C. and Koesterke, Lars and Medina, S. and Kingsburgh, R.}, title = {Spectroscopy of planetary nebulae with [WR] nuclei}, year = {1999}, language = {en} } @article{Tristram1999, author = {Tristram, Hildegard L. C.}, title = {How Celtic is Standard English?}, editor = {Asinovskij, Alexander S. and Kasanskij, N. N. and Kryuchkova, E. R. and Falileyev, Alexandre I.}, publisher = {Nauka}, address = {Sankt-Peterburg}, isbn = {5-02-028463-7}, pages = {46 S.}, year = {1999}, abstract = {In this brochure, Tristram argues that Standard English may be more indebted to the influence of 'Late British' than hitherto acknowledged by mainstream historical scholarship. By 'Late British' the native (or source) language of the about 2m language shifters in the wake of the Anglo-Saxon Conquest is meant who constituted the bulk of the native population of the island of Britain in the early middle ages. Although predictably, the influence of 'Late British' on Old English neither shows in the lexis of written Old English nor in its core grammar, it does show in the phonology (Peter Schrijver) and the inflectional syncretism of the Northern dialect texts. The influence of the interlanguage of the shifters only really surfaces in Middle English texts, after the diglossia between the language of the HIGH variety of Old English of the ruling elite and the LOW variety of the working population was discontinued under Norman rule. A number of grammatical features are listed in this brochure, which show that Present Day Standard English typologically sides with the Celtic languages, and with the Neo-Brittonic languages in particular, rather than with the other Continental Germanic languages. The brochure also calls for more research into this matter and in particular detailed investigations into the individual features mentioned.}, language = {en} } @article{BraunFeudelGebogietal.1999, author = {Braun, Robert and Feudel, Fred and Gebogi, C. and Kurths, J{\"u}rgen and Witt, Annette}, title = {Tracer dynamics in a flow of driven vortices}, year = {1999}, language = {en} } @article{HopfHatzichristou1999, author = {Hopf, Diether and Hatzichristou, C.}, title = {Teacher gender-related influences in Greek schools}, year = {1999}, language = {en} } @article{SchlegerBeckerOeschetal.1999, author = {Schleger, C. and Becker, Rolf and Oesch, Franz and Steinberg, Pablo}, title = {The human p53 gene mutated at position 249 per se is not sufficient to immortalize human liver cells}, year = {1999}, language = {en} } @article{FormerWagnerRichertetal.1999, author = {Former, C. and Wagner, H. and Richert, R. and Neher, Dieter and M{\"u}llen, K.}, title = {Orientation and dynamics of chainlike dipole arrays: Donor-acceptor-substituted oligophenylenevinylenes in a polymer matrix}, year = {1999}, language = {en} } @article{GedvilaiteFroemmelSasnauskasetal.2000, author = {Gedvilaite, Alma and Fr{\"o}mmel, C. and Sasnauskas, K. and Micheel, Burkhard and {\"O}zel, M. and Behrsing, Olaf and Staniulis, J. and Jandrig, Burkhard and Scherneck, Siegfried and Ulrich, R.}, title = {Formation of immunogenic virus-like particles by inserting epitopes into surface-exposed regions of hamster polyomavirus major capsid protein}, year = {2000}, language = {en} } @article{ThulkeTischendorfStaubachetal.2000, author = {Thulke, Hans-Hermann and Tischendorf, L. and Staubach, C. and Selhorst, T. and Jeltsch, Florian and M{\"u}ller, T. and Schl{\"u}ter, H. and Wissel, Christian}, title = {The spatio-temporal dynamics of a post-vaccination recovery of rabies in foxes and emergency vaccination planning}, year = {2000}, language = {en} } @article{SchroederVanDerVenWarloetal.2000, author = {Schr{\"o}der, Rolf and VanDerVen, Peter F. M. and Warlo, Irene and Schumann, H. and F{\"u}rst, Dieter Oswald and Bl{\"u}mke, Ingmar and Goebel, Hans H. and Schmidt, M. C. and Hatzfeld, Mechthild}, title = {A member of the armadillo multigene family, is a constituent of sarcomeric I-bands in human skeletal muscle}, year = {2000}, language = {en} } @article{CandanDoraOberhaenslietal.2000, author = {Candan, O. and Dora, O. and Oberh{\"a}nsli, Roland and Cetinkaplan, Mete and Partzsch, Julius and Warkus, Friederike C. and D{\"u}rr, S.}, title = {Pan-African high-pressure metamorphism in the Precambrian basement of the Menderes massif, Western Anatolia, Turkey}, year = {2000}, language = {en} } @article{RossiAlvaradoRiessetal.2000, author = {Rossi, L. and Alvarado, Santos F. and Rieß, Walter and Schrader, Sigurd and Lidzey, D. G. and Bradley, D. D. C.}, title = {Influence of alkoxy substituents on the exciton binding energy of conjugated polymers}, year = {2000}, language = {en} } @article{SchlegerHeckSteinberg2000, author = {Schleger, C. and Heck, R. and Steinberg, Pablo}, title = {The role of wild-type and mutated N-ras in the malignant transformation of liver cells}, year = {2000}, language = {en} } @article{FlueraruSchraderZaulsetal.2000, author = {Flueraru, C. and Schrader, Sigurd and Zauls, V. and Motschmann, H.}, title = {Sensitivity analysis of ellipsometry applied to uniaxial optical films}, year = {2000}, language = {en} } @article{ParraSpenceSajdaetal.2000, author = {Parra, L. and Spence, C. and Sajda, P. and Ziehe, Andreas and M{\"u}ller, Klaus-Robert}, title = {Unmixing hyperspectral data}, year = {2000}, language = {en} } @article{MikatOrgzallSappetal.2000, author = {Mikat, J{\"u}rgen E. R. and Orgzall, Ingo and Sapp, S. and Martin, C. R. and Hochheimer, H. D.}, title = {Optical investigations of conducting polypyrrole under pressure}, year = {2000}, language = {en} } @phdthesis{Wanner2000, author = {Wanner, Susanne C.}, title = {Transport, retention, and turnover of particulate organic matter (POM) in the lowland River Spree (Germany)}, pages = {101 S.}, year = {2000}, language = {en} } @phdthesis{Metges2000, author = {Metges, Cornelia C.}, title = {Investigations on kinetics and dietary requirements of amino acids in healthy adults using stable isotope tracer techniques}, pages = {128 S.}, year = {2000}, language = {en} } @article{ZhuangSchellingStangletal.2000, author = {Zhuang, Y. and Schelling, Christoph and Stangl, Jochen and Penn, C. and Senz, S. and Sch{\"a}ffler, Friedrich and Roche, T. and Daniel, A. and Grenzer, J{\"o}rg and Pietsch, Ullrich and Bauer, G{\"u}nther}, title = {Structural and optical properties of Si/Si{1-x}Ge{x} wires}, year = {2000}, language = {en} } @article{LaybournParryBellRoberts2000, author = {Laybourn-Parry, J. and Bell, Elanor M. and Roberts, E. C.}, title = {Growth of Protozoa in Antarctic lakes}, year = {2000}, abstract = {The growth rates of heterotrophic nanoflagellates (HNAN), mixotrophic cryptophytes, dinoflagellates and ciliates in field assemblages from Ace Lake in the Vestfold Hills (eastern Antarctica) and Lakes Fryxell and Hoare (McMurdo Dry Valleys, western Antarctica), were determined during the austral summers of 1996/1997 and 1997/1998. The response of the nanoflagellates to temperature differed between lakes in eastern and western Antarctica. In Ace Lake the available bacterial food resources had little impact on growth rate, while temperature imposed an impact, whereas in Lake Hoare increased bacterial food resources elicited an increase in growth rate. However, the incorporation of published data from across Antarctica showed that temperature had the greater effect, but that growth is probably controlled by a suite of factors not solely related to bacterial food resources and temperature. Dinoflagellates had relatively high specific growth rates (0.0057-0.384 h(-1)), which were comparable to Antarctic lake ciliates and to dinoflagellates from warmer, lower latitude locations. Temperature did not appear to impose any significant impact on growth rates. Mixotrophic cryptophytes in Lake Hoare had lower specific growth rates than HNAN (0.0029-0.0059 h(-1) and 0.0056-0.0127 h(-1), respectively). They showed a marked seasonal variation in growth rate, which was probably related to photosynthetically active radiation under the ice at different depths in the water column. Ciliates' growth rates showed no relationship between food supply and mean cell volume, but did show a response to temperature. Specific growth rates ranged between 0.0033 and 0.150 h(-1) for heterotrophic ciliates, 0.0143 h(-1) for a mixotrophic Plagiocampa species and 0.0075 h(-1) for the entirely autotrophic ciliate, Mesodinium rubrum. The data indicated that the scope for growth among planktonic Protozoa living in oligotrophic, cold extreme lake ecosystems is limited. These organisms are likely to suffer prolonged physiological stress, which may account for the highly variable growth rates seen within and between Antarctic lakes.}, language = {en} } @article{LaybournParryRobertsBell2000, author = {Laybourn-Parry, J. and Roberts, E. C. and Bell, Elanor M.}, title = {Mixotrophy as a survival strategy in Antarctic lakes}, year = {2000}, abstract = {Mixotrophy is a widespread phenomenon among planktonic protists. It involves the combination of autotrophy and heterotrophy in varying degrees. Many phytoflagellate species ingest bacteria as a means of obtaining nutrients for photosynthesis or for supplementing their carbon budget under light limitation. Ciliates either sequester the plastids of their algal prey or harbour endosymbiotic algae. In the saline lakes of the Vestfold Hills and in Lakes Hoare and Fryxell in the McMurdo Dry Valleys the dominant phytoflagellates ingest bacteria, and there is evidence to suggest that during the winter months they lack chlorophyll and may become entirely heterotrophic. In Lake Fryxell phagotrophic pyhtoflagellates (cryptophytes) made a significant impact on bacterial production, removing up to 13\% of the bacterial biomass day-1. These cryptophytes suffered predation from Plagiocampa (a ciliate), which appears to harbour them for a significant period before digesting them. We suspect that this may be equivalent to an intermediate stage in the evolution of mixotrophy. A significant number of the planktonic ciliates in Antarctic lakes were mixotrophic. The final evolutionary end point is the situation seen in Mesodinium rubrum, which now relies entirely on its cryptophycean endosymbiont and no longer ingests food. Mesodinium is the dominant ciliate in many of the saline lakes of the Vestfold Hills, which are of marine origin. It can reach abundances in excess of 60,000l-1 in Ace Lake, This ciliate is a ubiquitous member of the marine plankton worldwide and has successfully adapted to the lacustrine environment in Antarctica. The evidence suggests that among the survival strategies seen in Antarctic lake plankton, mixotrophy plays and important role among a number of the dominant protozoan species.}, language = {en} } @article{KumkeSpechtFrimmel2000, author = {Kumke, Michael Uwe and Specht, C. H. and Frimmel, Fritz Hartmann}, title = {Characterization of NOM adsorption to clay minerals by sizs exclusion chromatography}, year = {2000}, language = {en} } @article{ZeimerBuggeGramlichetal.2000, author = {Zeimer, Ute and Bugge, F. and Gramlich, S. and Smirnitzki, V. and Weyers, Markus and Tr{\"a}nkle, G. and Grenzer, J{\"o}rg and Pietsch, Ullrich and Cassabois, G. and Emiliani, V. and Lienau, C.}, title = {Evidence for strain-induced lateral carrier confinement in InGaAs quantum wells by low-temperature near-field spectroscopy}, year = {2000}, language = {en} } @article{GrossMuellerNothoferetal.2000, author = {Gross, M. and M{\"u}ller, David C. and Nothofer, Heinz-Georg and Scherf, Ullrich and Neher, Dieter and Br{\"a}uchler, C. and Meerholz, Klaus}, title = {Improving the performance of doped p-conjugated polymers for use in organic light-emitting diodes}, year = {2000}, language = {en} } @article{BauerUmbaschGiessenetal.2000, author = {Bauer, C. and Umbasch, G. and Giessen, H. and Meisel, A. and Nothofer, Heinz-Georg and Neher, Dieter and Scherf, Ullrich and Marth, R.}, title = {Polarized Photoluminescence and Spectral Narrowing in an oriented Polyfluorene Thin Film}, year = {2000}, language = {en} } @article{OdaNothoferLieseretal.2000, author = {Oda, Masao and Nothofer, Heinz-Georg and Lieser, G. and Scherf, Ullrich and Meskers, S. C. J. and Neher, Dieter}, title = {Circularly-polarized electroluminescence from liquid-crystalline chiral polyfluorenes}, year = {2000}, language = {en} } @article{BauerBoehmerMorenoFloresetal.2000, author = {Bauer, C. and B{\"o}hmer, Roland and Moreno-Flores, S. and Richert, R. and Sillescu, H. and Neher, Dieter}, title = {Capacitive scanning dilatometry and frequency dependent thermal expansion of polymer films}, year = {2000}, language = {en} } @article{OdaMeskersNothoferetal.2000, author = {Oda, Masao and Meskers, S. C. J. and Nothofer, Heinz-Georg and Scherf, Ullrich and Neher, Dieter}, title = {Chiroptical properties of chiral-substituted polyfluorenes}, year = {2000}, language = {en} } @article{BenassiBertariniKleinpeteretal.2000, author = {Benassi, Rois and Bertarini, C. and Kleinpeter, Erich and Taddei, F. and Thomas, Steffen}, title = {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}, year = {2000}, language = {en} } @article{BenassiBertariniKleinpeteretal.2000, author = {Benassi, Rois and Bertarini, C. and Kleinpeter, Erich and Taddei, F.}, title = {Exocyclic push-pull conjugated compounds, Part 2 : the effect of donor and acceptor substituents on the rotational barrier of push-pull ethylenes}, year = {2000}, language = {en} } @article{BenassiBertariniHilfertetal.2000, author = {Benassi, Rois and Bertarini, C. and Hilfert, Liane and Kempter, Gerhard and Kleinpeter, Erich and Spindler, J{\"u}rgen and Taddei, F. and Thomas, Steffen}, title = {Exocyclic push-pull conjugated compounds : Part 3}, year = {2000}, language = {en} } @article{YuKoflerHaeusleretal.2001, author = {Yu, Tien-Shin and Kofler, Heike and H{\"a}usler, Rainer E. and Hille, Diana and Fl{\"u}gge, Ulf-Ingo and Zeeman, Samuel C. and Smith, Alison M. and Kossmann, Jens and Lloyd, James R. and Ritte, Gerhard and Steup, Martin and Lue, Wei-Ling and Chen, Jychian and Weber, Andreas P. M.}, title = {The Arabidopsis sex1 mutant is defective in the R1 protein, a general regulator of starch degradation in plants, and not in the chloroplast hexose transporter}, issn = {1040-4651}, year = {2001}, language = {en} } @article{RawelKrollHohl2001, author = {Rawel, Harshadrai Manilal and Kroll, J{\"u}rgen and Hohl, U. C.}, title = {Model studies on reactions of plant phenols with whey proteins}, year = {2001}, language = {en} } @article{HairstonHoltmeierLampertetal.2001, author = {Hairston, Nelson G. and Holtmeier, C. L. and Lampert, W. and Weider, L. J. and Post, D. M. and Fischer, J. M. and Caceres, C. E. and Fox, J. A. and Gaedke, Ursula}, title = {Natural selection for grazer resistance to toxic cyanobacteria: Evolution of phenotypic plasticity?}, year = {2001}, language = {en} } @article{TsirelsonAvilovLepeshovetal.2001, author = {Tsirelson, Vladimir G. and Avilov, Anatoly S. and Lepeshov, G. G. and Kuligin, A. K. and Stahn, Jochen and Pietsch, Ullrich and Spence, J. C. H.}, title = {Quantitative Analysis of the Inner-Crystal Electrostatic Potential of several Rock-Salt-Structure Crystals Using Accurate Electron-Diffraction Data}, issn = {1089-5647}, year = {2001}, language = {en} } @article{LetzelPeterKatalinicPeter2001, author = {Letzel, Matthias C. and Peter-Katalinic, Jasna and Peter, Martin G.}, title = {Mass spectrometry of chitin and chitosan oligosaccharides}, year = {2001}, language = {en} } @article{Illenseer2001, author = {Illenseer, C.}, title = {Investigation of ion-molecule collisions with laser-based ion mobility spectrometry}, year = {2001}, language = {en} } @article{StrehmelHenbestSarkeretal.2001, author = {Strehmel, Bernd and Henbest, K. B. and Sarker, A. M. and Malpert, J. H. and Chen, D. Y. and Rodgers, M. A. J. and Neckers, D. C.}, title = {Ion induced man ipulation of photochemical pathways in crown ether compounends based on fluorinated oligophenylenevinylenes}, publisher = {Journal of nanoscience and nanotechnology. - 1 (2001), 1, S. 107 - 124}, year = {2001}, language = {en} } @article{WolfDyeKleinheinrichetal.2001, author = {Wolf, C. and Dye, S. and Kleinheinrich, M. and Meisenheimer, Klaus and Rix, Hans-Walter and Wisotzki, Lutz}, title = {Deep BVR photometry of the Chandra Deep Field South from the COMBO-17 survey}, year = {2001}, abstract = {We report on deep multi-color imaging (R5sigma = 26) of the Chandra Deep Field South, obtained with the Wide Field Imager (WFI) at the MPG/ESO 2.2 m telescope on La Silla as part of the multi-color survey COMBO-17. As a result we present a catalogue of 63 501 objects in a field measuring 31farcm5 x 30arcmin with astrometry and BVR photometry. A sample of 37 variable objects is selected from two-epoch photometry. We try to give interpretations based on color and variation amplitude.}, language = {en} } @article{PugaAlcaldeBarrenaetal.2001, author = {Puga, E. and Alcalde, D. and Barrena, R. and Mediavilla, E. and Motta, V. and Munoz, J. A. and Oscoz, Alejandro and Serra-Ricart, M. and Gil-Merino, Rodrigo and Goicoechea, Luis Julian and Lewis, G. f and Libbrecht, C. and Moreau, O. and Surdej, J. and Wambsganß, Joachim}, title = {Daily monitoring of the gravitational lens QSO 2237+0305 at the Nordic Optical Telescope}, isbn = {0-7923-6974-2}, year = {2001}, language = {en} } @article{KoopmansBruynWambsganssetal.2001, author = {Koopmans, L. V. E. and Bruyn, A. G. and Wambsganß, Joachim and Fassnacht, C. D.}, title = {A radio-microlensing caustic crossing in B1600+434?}, isbn = {1-538-81076-5}, year = {2001}, abstract = {First, we review the current status of the detection of strong `external' variability in the CLASS gravitational B1600+434, focusing on the 1998 VLA 8.5-GHz and 1998/9 WSRT multi-frequency observations. We show that this data can best be explained in terms of radio-microlensing. We then proceed to show some preliminary results from our new multi-frequency VLA monitoring program, in particular the detection of a strong feature (~30\%) in the light curve of the lensed image which passes predominantly through the dark-matter halo of the lens galaxy. We tentatively interpret this event, which lasted for several weeks, as a radio-microlensing caustic crossing, i.e. the superluminal motion of a micro-arcsec-scale jet-component in the lensed source over a single caustic in the magnification pattern, that has been created by massive compact objects along the line-of-sight to the lensed image.}, language = {en} } @article{WisotzkiChristliebLiuetal.2001, author = {Wisotzki, Lutz and Christlieb, N. and Liu, M. C. and Maza, J. and Morgan, N. D. and Schechter, P. L.}, title = {Discovery of a New Multiple Gravitationally Lensed QSO}, isbn = {1-583-81074-9}, year = {2001}, language = {en} } @article{JansenBuschmannWegoetal.2001, author = {Jansen, K. and Buschmann, Hans-J{\"u}rgen and Wego, A. and Dopp, D. and Mayer, C. and Holdt, Hans-Joachim and Schollmeyer, E.}, title = {Curcubit[5]uril, decamethylcururbit[5]uril and curcurbit[6]uril : synthesis, solubility and amin complex formation}, year = {2001}, abstract = {A simple way to prepare cucurbit[5]uril is described. The macrocycles of the cucurbituril type are nearly insoluble in water. The solubilities of cucurbit[5]uril, decamethylcucurbit[5]uril and cucurbit[6]uril in hydrochloric acid, formic acid and acetic acid of different concentrations have been investigated. Due to the formation of complexes between cucurbit[n]urils and protons the solubility increases in aqueous acids. The macrocyclic ligands are able to form complexes with several organic compounds. Thus, the complex formation of the cucurbituril macrocycles with different amines has beenstudied by means of calorimetric titrations. The reaction enthalpy gives noevidence of the formation of inclusion or exclusion complexes. 1H-NMR measurements show that in the case of cucurbit[5]uril and cucurbit[6]uril the organic guest compound is included within the hydrophobic cavity. Decamethylcucurbit[5]uril forms only exclusion complexes with organicamines. This was confirmed by the crystal structure of the decamethylcucurbit[5]uril-1,6- diaminohexane complex. complex formation - cucurbit[5]uril - cucurbit[6]uril - decamethylcucurbit[5]uril - solubility - synthesis}, language = {en} } @article{HamannBrownFeldmeieretal.2001, author = {Hamann, Wolf-Rainer and Brown, John C. and Feldmeier, Achim and Oskinova, Lidia M.}, title = {On the wavelength drift of spectral features from structured hot star winds}, year = {2001}, abstract = {Spectral lines formed in stellar winds from OB stars are observed to exhibit profile variations. Discrete Absorption Components (DACs) show a remarkably slow wavelength drift with time. In a straightforward interpretation, this is in sharp contradiction to the steep velocity law predicted by the radiation-driven wind theory, and by semi- empirical profile fitting. In the present paper we re-discuss the interpretation of the drift rate. We show that the Co- rotating Interaction Region (CIR) model for the formation of DACs does not explain their slow drift rate as a consequence of rotation. On the contrary, the apparent acceleration of a spectral CIR feature is even higher than for the corresponding kinematical model without rotation. However, the observations can be understood by distinguishing between the velocity field of the matter flow, and the velocity law for the motion of the patterns in which the DAC features are formed. If the latter propagate upstream against the matter flow, the resulting wavelength drift mimics a much slower acceleration although the matter is moving fast. Additional to the DACs, a second type of recurrent structures is present in observed OB star spectra, the so-called modulations. In contrast to the DACs, these structures show a steep acceleration compatible with the theoretically predicted velocity law. We see only two possible consistent scenarios. Either, the wind is accelerated fast, and the modulations are formed in advected structures, while the DACs come from structures which are propagating upstream. Or, alternatively, steep and shallow velocity laws may co-exist at the same time in different spatial regions or directions of the wind.}, language = {en} } @article{VernesiPecchioliTiedemannetal.2002, author = {Vernesi, C. and Pecchioli, E. and Tiedemann, Ralph and Randi, E. and Bertorelle, G.}, title = {The genetic structure of natural and reintroduced roe deer (Capreolus capreolus) populations in the Alps and central Italy, with reference to the mitochondrial DNA phylogeography of Europe}, issn = {0962-1083}, year = {2002}, language = {en} } @article{NistorOsvikDavidssonetal.2002, author = {Nistor, C. and Osvik, A. and Davidsson, R. and Rose, Andreas and Wollenberger, Ursula and Pfeiffer, Dorothea and Emneus, J. and Fiksdal, L.}, title = {Detection of escherichia coli water by culture-based amperometric and luminometric methods}, year = {2002}, language = {en} } @article{BarlowGreigBridgesetal.2002, author = {Barlow, S. M. and Greig, J. B. and Bridges, J. W. and Carere, A. and Carpy, A. J. and Galli, Corrado L. and Kleiner, J. and Knudsen, I. and Koeter, H. B. and Levy, L. S. and Madsen, C. and Mayer, S. and Narbonne, J. F. and Pfannkuch, F. and Prodanchuk, M. G. and Smith, Mason R. and Steinberg, Pablo}, title = {Hazard identification by methods of animal-based toxicology}, year = {2002}, language = {en} } @article{NistorRoseFarreetal.2002, author = {Nistor, C. and Rose, Andreas and Farre, M. and Stoica, L. and Wollenberger, Ursula and Ruzgas, T. and Pfeiffer, Dorothea and Barcelo, Damia and Gorton, Lo and Emneus, J.}, title = {In-field monitoring of cleaning efficiency in waste water treatment plants using two phenolsensitive biosensors}, year = {2002}, language = {en} } @misc{BellVincent2002, author = {Bell, Elanor M. and Vincent, Amanda C. J.}, title = {Art.: Gasterosteiform}, year = {2002}, language = {en} } @misc{DoscheLoehmannsroebenBieseretal.2002, author = {Dosche, Carsten and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Bieser, A. and Dosa, P. I. and Han, S. and Iwamoto, M. and Schleifenbaum, A. and Vollhardt, K. Peter C.}, title = {Photophysical properties of [N]phenylenes}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-11936}, year = {2002}, abstract = {In the present study, photophysical properties of [N]phenylenes were studied by means of stationary and time-resolved absorption and fluorescence spectroscopy (in THF at room temperature). For biphenylene (1) and linear [3]phenylene (2a), internal conversion (IC) with quantum yields ΦIC > 0.99 is by far the dominant mechanism of S1 state deactivation. Angular [3]phenylene (3a), the zig-zag [4]- and [5]phenylenes (3b), (3c), and the triangular [4]phenylene (4) show fluorescence emission with fluorescence quantum yieds and lifetimes between ΦF = 0.07 for (3a) and 0.21 for (3c) and τF = 20 ns for (3a) and 81 ns for (4). Also, compounds (3) and (4) exhibit triplet formation upon photoexcitation with quantum yields as high as ΦISC = 0.45 for (3c). The strong differences in the fluorescence properties and in the triplet fromation efficiencies between (1) and (2a) on one hand and (3) and (4) on the other are related to the remarkable variation of the internal conversion (IC) rate constants kIC. A tentative classification of (1) and (2a) as "fast IC compounds", with kIC > 109 s-1, and of (3) and (4) as "slow IC compounds", with kIC ≈ 107 s-1, is suggested. This classification cannot simply be related to H{\"u}ckel's rule-type concepts of aromaticity, because the group of "fast IC compounds" consists of "antiaromatic" (1) and "aromatic" (2a), and the group of "slow IC compounds" consists of "antiaromatic" (3b), (4) and "aromatic" (3a), (3c). The IC in the [N]phenylenes is discussed within the framework of the so-called energy gap law established for non-radiative processes in benzenoid hydrocarbons.}, language = {en} } @misc{KaafaraniWexStrehmeletal.2002, author = {Kaafarani, Bilal R. and Wex, Brigitte and Strehmel, Bernd and Neckers, Douglas C.}, title = {Structural concept for fluorinated Y-enynes with solvatochromic properties}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-13168}, year = {2002}, abstract = {An approach to the development of fluorescent probes to follow polymerizations in situ using fluorinated cross-conjugated enediynes (Y-enynes) is reported. Different substitution patterns in the Y-enynes result in distinct solvatochromic behavior. β,β-Bis(phenylethynyl)pentafluorostyrene 7, which bears no donor substituents and only fluorine at the styrene moiety, shows no solvatochromism. Donor substituted β,β-bis(3,4,5-trimethoxyphenylethynyl) pentafluorostyrene 8 and β,β-bis(4-butyl-2,3,5,6-tetrafluorophenylethynyl)-3,4,5-trimethoxystyrene 9 exhibit solvatochromism upon change of solvent polarity. Y-enyne 8 showed the largest solvatochromic shift (94 nm bathochromic shift) upon changing solvent from cyclohexane to acetonitrile. A smaller solvatochromic response (44 nm bathochromic shift) was observed for 9. Lippert-Mataga treatment of 8 and 9 yields slopes of -10,800 and -6,400 cm -1, respectively. This corresponds to a change in dipole moment of 9.6 and 6.9 D, respectively. The solvatochromic behavior in 8 and 9 supports the formation of an intramolecular charge transfer (ICT) state. The low fluorescence quantum yields are caused by competitive double bond rotation. The fluorescence decay time of 9 decreases in methyltetrahydrofuran from 2.1 ns at 77 K to 0.11 ns at 200 K. Efficient single bond rotation in 9 was frozen at -50 °C in a configuration in which the trimethoxyphenyl ring is perpendicular to the fluorinated rings. 7-9 are photostable compounds. The X-ray structure of 7 shows it is not planar and that its conjugation is distorted. Y-enyne 7 stacks in the solid state showing coulombic, actetylene-arene, and fluorine-π interactions.}, language = {en} } @article{DoscheLoehmannsroebenBieseretal.2002, author = {Dosche, Carsten and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Bieser, A. and Dosa, P. I. and Han, S. and Iwamoto, M. and Schleifenbaum, A. and Vollhardt, K. Peter C.}, title = {Photophysical properties of [N]phenylenes}, year = {2002}, language = {en} } @article{BahrkeEinarssonGislasonetal.2002, author = {Bahrke, Sven and Einarsson, Jon M. and Gislason, Johannes and Haebel, Sophie and Letzel, Matthias C. and Peter-Katalinic, Jasna and Peter, Martin G.}, title = {Sequence analysis of chitooligosaccharides by matrix-assisted laser desorption ionization postsource decay mass spectrometry}, year = {2002}, abstract = {Oligosaccharides composed of 2-acetamido-2-deoxy-D-glucopyranose (GlcNAc) and/or 2-amino-2-deoxy-D- glucopyranose (GlcN) were prepd. by chem. degrdn. of chitin or chitosan and sepd. by gel permeation chromatog. Oligosaccharides obtained after enzymic hydrolysis of chitosan [FA 0.19] with a fungal chitinase were derivatized by reductive amination with 2-aminoacridone and sequenced by matrix-assisted laser desorption ionization time-of-flight postsource decay (PSD) mass spectrometry (MS). The sequence of a trimer, D1A2, was established as D-A-A. The compn. of a hexamer D3A3 was .apprx.65\% D-A-D-D-A-A and 35\% D-D-A-D-A-A. The PSD MS of a nonamer D5A4-amac revealed four isobaric species D-X-Y-D-X-Y-D-A-A, where A is GlcNAc, D is GlcN, and X and Y (X ¹ Y) are mutually either D or A. This structure motif was also obsd. in a dodecamer D7A5 which was composed of eight isobaric sequences of the general formula (D-X-Y)3- D-A-A.}, language = {en} } @article{WeyhenmeyerAdrianGaedkeetal.2002, author = {Weyhenmeyer, G. A. and Adrian, Rita and Gaedke, Ursula and Livingstone, D. M. and Maberly, Stephen C.}, title = {Response of phytoplankton in European lakes to a change in the North Atlantic Oscillation}, issn = {0368-0770}, year = {2002}, language = {en} } @article{SchmidtKundicPenetal.2002, author = {Schmidt, Robert W. and Kundic, T. and Pen, U.-L. and Wambsganß, Joachim and Bergeron, L. E. and Colley, W. and Corson, C. and Hastings, N. G. and Hoyes, T. and Long, D. C. and Loomis, K. A. and Malhotra, S. and Rhoads, J. E. and Stanek, K. Z.}, title = {Optical monitoring of the gravitationally lensed quasar Q2237+0305 from APO between June 1995 and January 1998}, year = {2002}, abstract = {We present a data set of images of the gravitationally lensed quasar Q2237+0305, that was obtained at the Apache Point Observatory (APO) between June 1995 and January 1998. Although the images were taken under variable, often poor seeing conditions and with coarse pixel sampling, photometry is possible for the two brighter quasar images A and B with the help of exact quasar image positions from HST observations. We obtain a light curve with 73 data points for each of the images A and B. There is evidence for a long (ga 100 day) brightness peak in image A in 1996 with an amplitude of about 0.4 to 0.5 mag (relative to 1995), which indicates that microlensing has been taking place in the lensing galaxy. Image B does not vary much over the course of the observation period. The long, smooth variation of the light curve is similar to the results from the OGLE monitoring of the system (Wozniak et al. cite{Wozniak00}). Based on observations obtained with the Apache Point Observatory 3.5-meter telescope, which is owned and operated by the Astrophysical Research Consortium.}, language = {en} } @article{FryerLangerHegeretal.2002, author = {Fryer, C. L. and Langer, Norbert and Heger, Alexander and Wellstein, Stephan}, title = {The limiting stellar initial mass for black hole formation in close binary}, year = {2002}, abstract = {We present models for the complete life and death of a 60 Msolar star evolving in a close binary system, from the main-sequence phase to the formation of a compact remnant and fallback of supernova debris. After core hydrogen exhaustion, the star expands, loses most of its envelope by Roche lobe overflow, and becomes a Wolf-Rayet star. We study its post-mass transfer evolution as a function of the Wolf-Rayet wind mass-loss rate (which is currently not well constrained and will probably vary with the initial metallicity of the star). Varying this mass-loss rate by a factor of 6 leads to stellar masses at collapse that range from 3.1 up to 10.7 Msolar. Because of different carbon abundances left by core helium burning and nonmonotonic effects of the late shell-burning stages as function of the stellar mass, we find that, although the iron core masses at collapse are generally larger for stars with larger final masses, they do not depend monotonically on the final stellar mass or even the C/O core mass. We then compute the evolution of all models through collapse and bounce. The results range from strong supernova explosions (Ekin>1051ergs) for the lower final masses to the direct collapse of the star into a black hole for the largest final mass. Correspondingly, the final remnant masses, which were computed by following the supernova evolution and fallback of material for a timescale of about one year, are between 1.2 and 10 Msolar. We discuss the remaining uncertainties of this result and outline the consequences of our results for the understanding of the progenitor evolution of X-ray binaries and gamma-ray burst models.}, language = {en} } @article{LangerYoonWellsteinetal.2002, author = {Langer, Norbert and Yoon, S.-C and Wellstein, Stephan and Scheithauer, S.}, title = {On the evolution of interacting binaries which contain a white dwarf}, isbn = {1-58381-101-X}, year = {2002}, abstract = {We discuss the evolution of white dwarf containing binaries, in particular such systems consisting of a white dwarf and a main sequence star which have the potential to produce a Type Ia supernova. After investigating current problems in connecting observations of supersoft X-ray sources with such systems, we consider two major problems which theoretical models encounter to produce Chandrasekhar-mass white dwarfs: the helium shell burning instability and the white dwarf spin-up. We conclude by suggesting that the formation of Chandrasekhar-mass white dwarfs may be easier when these two problem are considered simultaneously.}, language = {en} }