@article{ZentgrafMuellerScheeretal.1981,
  author    = {Zentgraf, H. and M{\"u}ller, U. and Scheer, Ulrich and Franke, W. W.},
  title     = {Evidence for the existence of globular units in the supranucleosomal organization of chromatin},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34123},
  year      = {1981},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SchuesslerHenjesKunst1994,
  author    = {Sch{\"u}ssler, Ulrich and Henjes-Kunst, Friedhelm},
  title     = {Petrographical and Geochronological Investigations on a Garnet-Tourmaline Pegmatite from Ringgold Knoll, Oates Coast, Antarctica},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31789},
  year      = {1994},
  abstract  = {The Ringgold Knoll pegmatite, a late-stage member of the Granite Harbour Intrusives, crosscuts high-grade Wilson gneisses of the Oates Coast, which forms the westernmost part of the Wilson Terrane at the Pacific end of the Cambro-Ordovician Ross orogenic belt in West Antarctica. The pegmatite mineral assemblage consists of K-feldspar, plagioclase, quartz, garnet (almandinespessartine-pyrope), dark tourmaline (schorl-dravite), muscovite, apatite, monazite, zircon, blue AI-rich tourmaline and dumortierite in order of decreasing abundances. Major, minor and rare earth elements are reported for the greater part of the mineral assemblage. The time of pegmatite emplacement is constrained by Rb-Sr and Sm-Nd isochron ages of 492 ± 8 (2a) Ma and 500 ± 40 (2a) Ma, respectively. High initial 87Sr/86Sr of 0.7315 ± 0.0003 and low E Nd,t of -8.7 ± 1.2 strongly support an origin of the magma from highly evolved crustal source rocks. K-Ar and Ar-Ar model ages of about 470 to 475 Ma for igneous muscovite indicate that the pegmatite together with its wall rocks spent a prolonged period at elevated temperatures before final cooling below about 350 °C. The muscovite dates may give an estimate for the time of exhumation of the Oates Coast crystalline basement along two major late Ross orogenic detachment zones within the Wilson Terrane i.e. the Wilson and the Exiles thrusts (c.f. FL{\"O}TTMANN and KLEINSCHMIDT, 1991).},
  language  = {en}
}
@article{FialaMaschwitz1992,
  author    = {Fiala, Brigitte and Maschwitz, Ulrich},
  title     = {Domatia as most important adaptations in the evolution of myrmecophytes in the paleotropical tree genus Macaranga (Euphorbiacae)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32935},
  year      = {1992},
  abstract  = {The paleotropical tree genus Macaranga (Euphorbiaceae) comprises all stages of interaction with ants, from facultative associations to obligate myrmecophytes. In SE.-Asia food availability does not seem to be the limiting factor for the development of a close relationship since all species provide food for ants in form of extrafloral nectar and/or food bodies. Only myrmecophytic Macaranga species offer nesting space for ants (domatia) inside intern odes which become hollow due to degeneration of the pith. Non-myrmecophytic species have a solid stem with a compact and wet pith and many resin ducts. The stem interior of some transitional species remains solid, but the soft pith can be excavated. The role of different ant-attracting attributes for the development of obligate ant-plant interactions is discussed. In the genus Macaranga, the provision of nesting space seems to be the most important factor for the evolution of obligate myrmecophytism.},
  language  = {en}
}
@article{KrohneFrankeScheer1978,
  author    = {Krohne, Georg and Franke, Werner W. and Scheer, Ulrich},
  title     = {The major polypeptides of the nuclear pore complex},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33078},
  year      = {1978},
  abstract  = {Nuclear envelopes of maturing oocytes of various amphibia contain an unusually high number of pore complexes in very close packing. Consequently, nuclear envelopes , which can be manually isolated in great purity, provide a remarkable enrichment of nuclear pore complex material, relative to membranous and other interporous structures. When the polypeptides of nuclear envelopes isolated from oocytes of Xenopl/s la evis and Triturus alpestris are examined by gel electrophoresis, visualized either by staining with Coomassie blue or by radiotluorography after in vitro reaction with [3H]dansyl chloride , a characteristic pattern is obtained (10 major and 15 minor bands). This polypeptide pattern is radically different from that of the nuclear contents isolated from the same cell. Extraction of the nuclear envelope with high salt concentrations and moderateIy ac tive detergents such as Triton X- 100 results in the removal of membrane material but leaves most of the non-membranous structure of the pore complexes. The dry weight of the pore complex (about 0.2 femtograms) remains essentially unchanged during such extractions as measured by quantitative electron microscopy . The extracted preparations which are highly enriched in nuclear pore complex material contain only two major polypeptide components with apparent molecular weights of 150000 and 73000. Components of such an electrophoretic mobility are not present as major bands , if at all , in nuclear contents extracted in the same way. lt is concluded that these two polypeptides are the major constituent protein(s) of the oocyte nuclear pore complex and are specific for this structure. When nuclear envelopes are isolated from rat liver and extracted with high salt buffers and Triton X- 100 similar bands are predominant, but two additional major components of molecular weights of 78000 and 66000 are also recognized. When the rat liver nuclear membranes are further subfractionated material enriched in the 66000 molecular weight component can be separated from the membrane material, indicating that this is relatively loosely associated material , probably a part of the nuclear matrix . The results suggest that the nuclear pore complex is not only a characteristic ubiquitous structure but also contains similar, if not identical , skeletal proteins that are remarkably re sistant to drastic changes of ionic strength as weil as to treatments with detergents and thiol reagents.},
  language  = {en}
}
@article{ScheerSommerville1982,
  author    = {Scheer, Ulrich and Sommerville, John},
  title     = {Sizes of chromosome loops and hnRNA molecules in oocytes of amphibia of different genome sizes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33094},
  year      = {1982},
  abstract  = {The lengths of lampbrush chromosome loops and their tran scription units show a positive correlation with genome size in oocytes of amphibia with different C values. However, there is no such correlation with contour lengths of hnRNA molecu les isolated from these oocytes. These results indi cate th at more ON A sequences are transcribed in amphibia of higher C value , but that processing of RNA transc ripts occurs while they are still attached to the chromosomes as nascent ribonucleoprotein fibrils.},
  language  = {en}
}
@article{RunggerCrippaTrendelenburgetal.1978,
  author    = {Rungger, M. and Crippa, M. and Trendelenburg, M. F. and Scheer, Ulrich and Franke, Werner W.},
  title     = {Visualization of rDNA spacer transcription in Xenopus oocytes treated with fluorouridine},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33082},
  year      = {1978},
  abstract  = {Under the intluence of 5-tluoro-uridine, the ultrastructure of the rDNA transcription units in Xenopus oocytes is altered. Whereas part of the matrix units maintains anormal aspect or shows various degrees of inhibition, in a strong proportion of the transcription units the alternating pattern of matrix units and fibril-free spacer regions is no longer recognized. Transcriptional complexes are found along the entire DNP axis, including the regions of the spacers. These observations support biochemical data on transcription in rDNA spacer region.},
  language  = {en}
}
@article{DabauvalleSchulzScheeretal.1988,
  author    = {Dabauvalle, Marie-Christine and Schulz, Barbara and Scheer, Ulrich and Peters, Reiner},
  title     = {Inhibition of nuclear accumulation of karyophilic proteins in living cells by microinjection of the lectin wheat germ agglutinin},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34288},
  year      = {1988},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ScheerLanfranchiRoseetal.1983,
  author    = {Scheer, Ulrich and Lanfranchi, Gerolamo and Rose, Kathleen M. and Franke, Werner W. and Ringertz, Nils R.},
  title     = {Migration of rat RNA polymerase I into chick erythrocyte nuclei undergoing reactivation in chick-rat heterokaryons},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33232},
  year      = {1983},
  abstract  = {Transcriptionally inactive chick erythrocyte nudei were reactivated by Sendai virusinduced fusion of erythrocytes with rat L6j1 myoblasts. We used antibodies to trace the appearance of a specific protein engaged in transcription of a defined dass of genes, those coding for rRNA, during reactivation. Using immunofluorescence microscopy, we found increasing amounts of rat RNA polymerase I to appear, during a certain period of time after fusion, in the reforming nudeoli of the chick nudei. Amounts of rat RNA polymerase I sufficient to be detected by immunofluorescence microscopy had accumulated in the newly developed chick nudeoli 72- 190 h after fusion was initiated. This time interval coincides with the time when chick rRNA synthesis can first be detected. The results raise the possibility that during these stages of the reactivation process chick rRNA genes are transcribed by heterologous RNA polymerase I moleeules of rat origin.},
  language  = {en}
}
@article{ScheerHuegleHazanetal.1984,
  author    = {Scheer, Ulrich and H{\"u}gle, Barbara and Hazan, Rachel and Rose, Kathleen M.},
  title     = {Drug-induced dispersal of transcribed rRNA genes and transcriptional products: Immunolocalization and silver staining of different nucleolar components in rat cells treated with 5,6-dichloro-1-Beta-D-ribofuranosylbenzimidazole},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33216},
  year      = {1984},
  abstract  = {Upon incubation of cultured rat cells with the adenosine analogue 5,6-dichloro-l-\&\#946;- D-ribofuranosylbenzimidazole (DRB), nucleoli reversibly dissociate into their substructures, disperse throughout the nuclear interior, and form nucleolar "necklaces". We have used this experimental system, which does not inhibit transcription of the rRNA genes, to study by immunocytochemistry the distribution of active rRNA genes and their transcriptional products during nucleolar dispersal and recovery to normal morphology. Antibodies to RNA polymerase I allow detection of template-engaged polymerase, and monoclonal antibodies to a ribosomal protein (S 1) of the small ribosomal subunit permit localization of nucleolar preribosomal particles. The results show that, under the action of DRB transcribed rRNA, genes spread throughout the nucleoplasm and finally appear in the form of several rows, each containing several (up to 30) granules positive for RNA polymerase land argyrophilic proteins. Nucleolar material containing preribosomal particles also appears in granular structures spread over the nucleoplasm but its distribution is distinct from that of rRNA gene-containing granules. We conclude that, although transcriptional units and preribosomal particles are both redistributed in response to DRB, these entities retain their individuality as functionally defined subunits. We further propose that each RNA polymerase-positive granular unit represents a single transcription unit and that each continuous array of granules ("string of nucleolar beads") reflects the linear distribution of rRNA genes along a nucleolar organizer region. Based on the total number of polymerase I-positive granules we estimate that a minimum of 60 rRNA genes are active during interphase of DRB-treated rat cells.},
  language  = {en}
}
@article{ZentgrafTrendelenburgSpringetal.1979,
  author    = {Zentgraf, Hanswalter and Trendelenburg, Michael F. and Spring, Herbert and Scheer, Ulrich and Franke, Werner W. and M{\"u}ller, Ulrike and Drury, Kenneth C. and Rungger, Duri},
  title     = {Mitochondrial DNA arranged into chromatin-like structures after injection into amphibian oocyte nuclei},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33174},
  year      = {1979},
  abstract  = {Purified mitochondrial DNA (mitDNA) from ovaries ofXenopus lae vis was injected into the nuclei (germinal vesicles) of large viteUogenic oocytes of the same organism and examined by electron microscopy ofthe spread nuclear contents. Normally located nuclei of untreated oocytes as weil as peripherally translocated nuclei of centrifuged oocytes were used. In addition, oocyte nuclei isolated and incubated under liquid paraffin oil were injected with DNA. The integrity oftranscriptional structures of endogenous chromosomal (Iampbrush chromosomes) and extrachromosomal (nucleoli) genes of the injected nuclei was demonstrated. Microinjected mitDN A was identified as circles of chromatin exhibiting polynucleosome-like organization and a me an contour length of 2.6 J.Lm, corresponding to a compaction ratio of the mitDN A of about 2 : I. This DNA packing ratio is similar to that observed after preparation of various kinds of native chromatin in low salt buffers. The chromatin circles formed from injected mitDNA only very rarely exhibited lateral fibrils suggestive of transcriptional activity. These results suggest that purified mitDNA can be transformed to normally structured chromatin when exposed to oocyte nuclear contents but is rarely , if at all , transcribed in this form and in this environment.},
  language  = {en}
}
@article{CarrollSendtnerMeyeretal.1993,
  author    = {Carroll, Patrick and Sendtner, Michael and Meyer, Michael and Thoenen, Hans},
  title     = {Rat ciliary neurothrophic factor (CNTF): gene structure and regulation of mRNA levels in glial cell cultures.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31763},
  year      = {1993},
  abstract  = {The structure of the rat ciliary neurotrophic factor (CNTF) gene and the regulation ofCNTF mRNA levels in cultured glial cells were investigated. The rat mRNA is encoded by a simple two-exon transcription unit. Sequence analysis of the region upstream of the transcription start-site did not reveal a typical TATA-box consensus sequence. Low levels of CNTF mRNA were detected in cultured Schwann cells, and CNTF mRNA was not increased by a variety of treatments. Three-week-old astrocyteenriched cell cultures from new-born rat brain contained easily detectable CNTF mRNA. In astrocyte-enriched cultures, upregulation of CNTF mRNA levels was observed after treatment with IFN-gamma. CNTF mRNA levels were down-regulated in these cells by treatments that elevate intracellular cyclic AMP and by members of the fibroblast growth factor (FGF) family. The implications of these results for potential in vivo functions of CNTF are discussed.},
  language  = {en}
}
@article{ArakawaSendtnerThoenen1990,
  author    = {Arakawa, Yoshihiro and Sendtner, Michael and Thoenen, Hans},
  title     = {Survival effect of ciliary neurotrophic factor (CNTF) on chick embryonic motoneurons in culture: comparison with other neurotrophic factors and cytokines},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31718},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SendtnerStoeckliThoenen1992,
  author    = {Sendtner, Michael and St{\"o}ckli, K. A. and Thoenen, Hans},
  title     = {Synthesis and localization of ciliary neurotrophic factor in the sciatic nerve of the adult rat after lesion and during regeneration},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31738},
  year      = {1992},
  abstract  = {Ciliary neurotrophic factor (CNTF) is expressed in high quantities in Schwann cells of peripheral nerves during postnatal development of the rat. The absence of a hydrophobic leader sequence and the immunohistochemical localization of CNTF within the cytoplasm of these cells indicate that the factor might not be available to responsive neurons under physiological conditions. However, CNTF supports the survival of a variety of embryonic neurons, including spinal motoneurons in culture. Moreover we have recently demonstrated that the exogenous application of CNTF protein to the lesioned facial nerve of the newborn rat rescued these motoneurons from cell death. These results indicate that CNTF might indeed play a major role in assisting the survival of lesioned neurons in the adult peripheral nervous system. Here we demonstrate that the CNTF mRNA and protein levels and the manner in which they are regulated are compatible with such a function in lesioned peripheral neurons. In particular, immunohistochemical analysis showed significant quantities of CNTF at extracellular sites after sciatic nerve lesion. Western blots and determination of CNTF biological activity of the same nerve segments indicate that extracellular CNTF seems to be biologically active. After nerve lesion CNTF mRNA levels were reduced to <5 \% in distal regions of the sciatic nerve whereas CNTF bioactivity decreased to only one third of the original before-lesion levels. A gradual reincrease in Schwann cells occurred concomitant with regeneration.},
  language  = {en}
}
@article{StoeckliLililienNaeherNoeetal.1991,
  author    = {St{\"o}ckli, K. A. and Lililien, L. E. and N{\"a}her- No{\´e}, M. and Breitfeld, G. and Hughes, Richard A. and Raff, M. C. and Thoenen, Hans and Sendtner, Michael},
  title     = {Regional distribution, developmental changes, and cellular localization of CNTF-mRNA and protein in the rat brain},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31172},
  year      = {1991},
  abstract  = {Ciliary neurotrophic factor (CNTF) is a potent survival molecule for a variety of embryonic neurons in culture. The developmental expression of CNTF occurs clearly after the time period of the physiological cell death of CNTF-responsive neurons. This, together with the sites of expression, excludes CNTF as a target-derived neuronal survival factor, at least in rodents. However, CNTF also participates in the induction of type 2 astrocyte differentiation in vitro. Here we demonstrate that the time course of the expression of CNTF-mRNA and protein in the rat optic nerve (as evaluated by quantitative Northern blot analysis and biological activity, respectively) is compatible with such a glial differentiation function of CNTF in vivo. We also show that the type 2 astrocyte-inducing- activity previously demonstrated in optic nerve extract can be precipitated by an antiserum against CNTF. Immunohistochemical analysis of astrocytes in vitro and in vivo demonstrates that the expression of CNTF is confined to a subpopulation of type 1 astrocytes. The olfactory bulb of adult rats has comparably high levels of CNTF to the optic nerve, and here again, CNTF-immunoreactivity is localized in a subpopulation of astrocytes. However, the postnatal expression of CNTF in the olfactory bulb occurs later than in the optic nerve. In other brain regions both CNTF-mRNA and protein levels are much lower.},
  language  = {en}
}
@article{MasuWolfHoltmannetal.1993,
  author    = {Masu, Yasuo and Wolf, Eckhard and Holtmann, Bettina and Sendtner, Michael and Brem, Gottfried and Thoenen, Hans},
  title     = {Disruption of the CNTF gene results in motor neuron degeneration},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33038},
  year      = {1993},
  abstract  = {CNTF is a cytosolic molecule expressed postnatally in myelinating Schwann cells and in a subpopulation of astrocytes. Although CNTF administration prevents lesion-mediated and genetically determined motor neuron degeneration, its physiological function remained elusive. Here it is reported that abolition of CNTF gene expression by homologous recombination results in a progressive atrophy and loss of motor neurons in adult mice, which is functionally reflected by a small but significant reduction in muscle strength.},
  language  = {en}
}
@article{MengSendtnerSmith1995,
  author    = {Meng, Li and Sendtner, Michael and Smith, Austin},
  title     = {Essential function of LIF receptor in motor neurons},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34219},
  year      = {1995},
  abstract  = {D EVELOPME'iT and maintenance of the mammalian nervous system is dependent upon neurotrophic cytokines. One class of neurotrophic factor acts through rcccptor complexes involving the lowaffinity leukaemia inhibitor y faclor receptor subunit (LlF-R). Members of this fa mily of cytokines, such as ciliary neurotrophic factor (CNTF) and leukaemia inhibitory factor (LIF), have profound effects on the survival and maintenance of motor neurons, Recently it was reported that mice lacking LlF-R die shortly after birth unlike mice lacking CNTF or LIF which are viable. Here we describe histopathological analyses of lifr mutants tha t reveal a loss > 35\% of facia l motor neurons, 40\% of spinal motor neurons and 50\% of neurons in the nucleus ambiguus. These findings point to the existence of a ligand for LIF-R tha t is required for the normal development of motor neurons in both brainstem nuclei and spinal cord.},
  language  = {en}
}
@article{StoeckliLottspeichSendtneretal.1989,
  author    = {St{\"o}ckli, K. A. and Lottspeich, F. and Sendtner, Michael and Masiakowski, P. and Carroll, Patrick and G{\"o}tz, Rudolf and Lindholm, D. and Thoenen, Hans},
  title     = {Molecular cloning, expression and regional distribution of rat ciliary neurotrophic factor},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34229},
  year      = {1989},
  abstract  = {CILIARY neurotrophic factor (CNTF) was originally characterized as a survival factor for chick ciliary neurons in vitro. More recently, it was shown to promote the survival of a variety of otherneuronal cell types and to affect the differentiation of E7 chick sympathetic neurons by inhibiting their proliferation and by inducing the expression of yasoactiYe intestinal peptide immunoreactiyity (VIP-IR). In cultures of dissociated sympathetic neurons from newborn rats, CNTF induces cholinergic differentiation as shown by increased levels of choline acetyltransferase (ChAT.},
  language  = {en}
}
@article{Ellgring1982,
  author    = {Ellgring, Johann Heinrich},
  title     = {Video-unterst{\"u}tzte Therapie und Supervision - ein {\"U}berblick},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33599},
  year      = {1982},
  abstract  = {No abstract available},
  language  = {de}
}
@article{BuenemannPott1993,
  author    = {B{\"u}nemann, Moritz and Pott, Lutz},
  title     = {Membrane-delimited activation of muscarinic K current by an albumin-associated factor in guinea-pig atrial myocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31300},
  year      = {1993},
  abstract  = {No abstract available},
  language  = {en}
}
@article{VortkampGesslerPaslieretal.1994,
  author    = {Vortkamp, Andrea and Gessler, Manfred and Paslier, D. Le and Elaswarapu, R. and Smith, S. and Grzeschik, Karl-Heinz},
  title     = {Isolation of a yeast artificial chromosome contig spanning the Greig cephalopolysyndactyly syndrome (GCPS) gene region},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30182},
  year      = {1994},
  abstract  = {Disruption of the zinc finger gene GLI3 has been shown to be the cause of Greig cephalopolysyndactyly syndrome (GCPS), at least in some GCPS translocation patients. To characterize this genomic region on human chromosome 7p13, we have isolated a VAC contig of more than 1000 kb including the GLI3 gene. In this contig the gene itself spans at least 200-250 kb. A CpG island is located in the vicinity of the 5' region of the known GLI3 cDNA, implying a potential promoter region.},
  language  = {en}
}
@article{MaschwitzFialaDolling1987,
  author    = {Maschwitz, U. and Fiala, Brigitte and Dolling, W. R.},
  title     = {New trophobiotic symbioses of ants with South East Asian bugs},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34030},
  year      = {1987},
  abstract  = {A trophobiotic relationship between two species of phloem-feeding plataspid bugs and an ant, Meranoplus mucronatus, was discovered on tree trunks in Malaysia. Similar relationships were found between coreid bugs and Crematogaster sp. and Anoplolepis longipes, on bamboo in the same area. The ants recruit to groups of the bugs and feed on the liquid, sugar-rich faeces of the larvae, stimulating release of the honeydew by tactile signals. They protect all stages of the bugs from disturbance by biting and by the use of defensive secretions. Phloem-feeding bugs in the families Plataspidae and Coreidae need long sty lets to pierce the thick bark of their host tree. The different methods of accommodating the resting stylets in these two families are described. The plataspids are described as Tropidotylus servus sp. novo and T. minister sp. novo A coreid previously reported in association with M. mucronatus in Malaya is described as Hygia cliens sp. novo The coreids on bamboo were determined as Cloresmus spp. and Notobitus affinis.},
  language  = {en}
}
@article{MorenoDiazdelaEspinaFrankeKrohneetal.1982,
  author    = {Moreno-Diaz de la Espina, Susana and Franke, Werner W. and Krohne, Georg and Trendelenburg, Michael F. and Grund, Christine and Scheer, Ulrich},
  title     = {Medusoid fibril bodies: a novel type of nuclear filament of diameter 8 to 12 nm with periodic ultrastructure demonstrated in oocytes of Xenopus laevis},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34116},
  year      = {1982},
  abstract  = {No abstract available},
  language  = {en}
}
@article{HadjiolovaRoseScheer1986,
  author    = {Hadjiolova, Krassimira and Rose, Kathleen M. and Scheer, Ulrich},
  title     = {Immunolocalization of nucleolar proteins after D-galactosamine-induced inhibition of transcription in rat hepatocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33205},
  year      = {1986},
  abstract  = {No abstract available},
  language  = {en}
}
@article{MaschwitzFialaMoogetal.1991,
  author    = {Maschwitz, Ulrich and Fiala, Brigitte and Moog, J. and Saw, L. G.},
  title     = {Two new myrmecophytic associations from the Malay Peninsula: ants of the genus Cladomyrma as partners of Saraca thaipingensis and Crypteronia griffithii},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32992},
  year      = {1991},
  abstract  = {In Peninsular Malaysia the trees Saraca thaipingensis (Caesalpiniaceae) and Crypteronia griffithii (Crypteroniaceae) are inhabited by ants. In the vicinity ofGombak, near Kuala Lumpur, the hollow internodes of young Saraca thaipingensis plants are colonized mainly by two Cladomyrma species. In larger trees a Crematogaster sp. is also found. Crypteronia griffithii is inhabited by a third species of Cladomyrma. None of these species is conspecific with any of the three Cladomyrma taxa so far described. The colonies are founded by single mated queens, which have a conspicuous, sphecid wasp-like behaviour when searching for host plants and nest sites. They chew holes into the plant intern odes and hollow them out to provide nest sites. Coccids and pseudococcids are cultivated within the internodes. The homopterans are not carried by queens on their nuptial flights. They apparently find their way by themselves into the cavities or are perhaps carried there by the worker ants. The Cladomyrma ants on Crypteronia are not aggressive, in contrast to those on Saraca thaipingensis. The relationship of Crypteronia with ants seems to be obligatory, whereas Saraca was only partly colonized by Cladomyrma. The interaction of Saraca with Crematogaster sp. is loose and facultative, since the Crematogaster sp. also lives on other tree species. Our studies have now revealed four Cladomyrma spp. which are regularly associated with plants. The genus therefore seems to have an entirely myrmecophytic way of life.},
  language  = {en}
}
@article{LillienSendtnerRohreretal.1988,
  author    = {Lillien, Laura E. and Sendtner, Michael and Rohrer, Hermann and Hughes, Simon M. and Raff, Martin C.},
  title     = {Type-2 Astrocyte Development in Rat Brain Cultures is initiated by a CNTF-like protein produced by type-1 astrocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31708},
  year      = {1988},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SchuesslerSkinnerRoland1993,
  author    = {Sch{\"u}ssler, Ulrich and Skinner, David N. B. and Roland, Norbert W.},
  title     = {Subduction-related Mafic to Intermediate Plutonism in the Northwestern Wilson Terrane, North Victoria Land and Oates Coast, Antarctica},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31805},
  year      = {1993},
  abstract  = {No abstract available},
  language  = {en}
}
@article{Schuessler1993,
  author    = {Sch{\"u}ssler, Ulrich},
  title     = {Zur geologischen Situation der Erzlagerst{\"a}tte Kupferberg-Neufang in der Umrahmung der M{\"u}nchberger Gneismasse},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31791},
  year      = {1993},
  abstract  = {Die Kupfer-Zink-Lagerst{\"a}tte von Kupferberg-Neufang im Bereich der M{\"u}nchberger Deckenstruktur besteht aus einem etwa 4 km langen Zug einzelner stratiformer Vererzungslinsen, der in NW-SE-Richtung vom anchimetamorphen Pal{\"a}ozoikum "Bayerischer" Faziesentwicklung in die Prasinit-Phyllit-Serie hin{\"u}berzieht. Bisherige lagerst{\"a}ttenkundliche Untersuchimgen interpretierten die gesamte Lagerst{\"a}tte als einheitliche, submarin-exhalativ entstandene stratiforme Bildung in Zusammenhang mit ordovizischem basischem Vulkanismus, der in den Rahmengesteinen der Lagerst{\"a}tte durch die Diabase der anchimetamorphen Randschieferserie bzw. die Prasinite der Prasinit-Phyllit-Serie dokumentiert ist. Diese Vorstellung steht jedoch in deutlichem Widerspruch zu den Ergebnissen neuerer geochemischer und biostratigraphischer Untersuchungen, die f{\"u}r die Diabase und Prasinite eine v{\"o}llig unterschiedliche Zusammensetzung ergaben und die zeigten, daß die Prasinit-Phyllit-Serie schon im Oberproterozoikum, die erzf{\"u}hrenden Schichten im anchimetamorphen Pal{\"a}ozoikum aber erst im Unterdevon sedimentiert wurden. F{\"u}r eine Kl{\"a}rung der Situation sind weitere Untersuchungen im Bereich der Lagerst{\"a}tte erforderlich.},
  language  = {de}
}
@article{KreuzerSeidelSchuessleretal.1989,
  author    = {Kreuzer, Hans and Seidel, Eberhard and Sch{\"u}ssler, Ulrich and Okrusch, Martin and Lenz, Karl-Ludwig and Raschka, Helmut},
  title     = {K-Ar geochronology of different tectonic units at the northeastern margin of the Bohemian Massif},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31811},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SchuesslerRichterOkrusch1989,
  author    = {Sch{\"u}ssler, Ulrich and Richter, P. and Okrusch, Martin},
  title     = {Metabasites from the KTB Oberpfalz target area, Bavaria - geochemical characteristics and examples of mobile behaviour of "immobile" elements},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31021},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SchuesslerOppermannKreuzeretal.1986,
  author    = {Sch{\"u}ssler, Ulrich and Oppermann, Uwe and Kreuzer, Hans and Seidel, Eberhard and Okrusch, Martin and Lenz, Karl-Ludwig and Raschka, Helmut},
  title     = {Zur Altersstellung des ostbayerischen Kristallins - Ergebnisse neuer K-Ar Datierungen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31778},
  year      = {1986},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1991,
  author    = {Ruhe, Ernstpeter},
  title     = {Ahmed Sefrioui: La bo{\^i}te {\`a} merveilles.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36766},
  year      = {1991},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1989,
  author    = {Ruhe, Ernstpeter},
  title     = {Die Turnierkunst des Huon de M{\´e}ry},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36753},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1977,
  author    = {Ruhe, Ernstpeter},
  title     = {Rezeptionsgeschichte und Trivialliteratur: Ein Leser der Nouvelle H{\´e}loise im Jahre 1838.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36728},
  year      = {1977},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1984,
  author    = {Ruhe, Ernstpeter},
  title     = {Der Roman als totales Spiel: Alain Robbe-Grillet, Topologie d'une cit{\´e} fant{\^o}me.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36889},
  year      = {1984},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1985,
  author    = {Ruhe, Ernstpeter},
  title     = {Aim{\´e} C{\´e}saires Bearbeitungen von Une saison au Congo},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36837},
  year      = {1985},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1978,
  author    = {Ruhe, Ernstpeter},
  title     = {Caliban als Dialektiker},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36850},
  year      = {1978},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1970,
  author    = {Ruhe, Ernstpeter},
  title     = {A Johenne, ma dame et m'amie},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36735},
  year      = {1970},
  abstract  = {No abstract available},
  language  = {fr}
}
@article{Ruhe1970,
  author    = {Ruhe, Ernstpeter},
  title     = {Enanchet - "semplice compilatore"?},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36967},
  year      = {1970},
  abstract  = {No abstract available},
  language  = {fr}
}
@article{PletichaGeuder1989,
  author    = {Pleticha-Geuder, Eva},
  title     = {Die Drucke des W{\"u}rzburger "Kreises der J{\"u}ngeren"},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36296},
  year      = {1989},
  abstract  = {No abstract available},
  subject      = {W{\"u}rzburg},
  language  = {de}
}
@article{PletichaGeuder1988,
  author    = {Pleticha-Geuder, Eva},
  title     = {Ex Bibliotheca Monasterii Neustatt ad Moenum. Zur Geschichte der Bibliothek von Kloster Neustadt am Main bis zur S{\"a}kularisation.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35469},
  year      = {1988},
  abstract  = {No abstract available},
  subject      = {W{\"u}rzburg / Universit{\"a}tsbibliothek},
  language  = {de}
}
@article{PletichaGeuder1989,
  author    = {Pleticha-Geuder, Eva},
  title     = {Erl{\"a}uterungen zu den Miniaturen der Handschrift},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35451},
  year      = {1989},
  abstract  = {Die Fries-Chronik des F{\"u}rstbischofs Julius Echter von Mespelbrunn : eine fr{\"a}nkische Prachthandschrift des 16. Jahrhunderts aus dem Bestand der Universit{\"a}tsbibliothek W{\"u}rzburg Codex M.ch. f.760 ; [Ausstellung zur 500. Wiederkehr des Geburtstages von Magister Lorenz Fries (1489 - 1550), 19. Oktober - 3. Dezember 1989, Universit{\"a}tsbibliothek W{\"u}rzburg]},
  subject      = {Fries},
  language  = {de}
}
@article{Daut1980,
  author    = {Daut, Volker},
  title     = {Die Entwicklung der Todesvorstellung bei Kindern und Jugendlichen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-36069},
  year      = {1980},
  abstract  = {No abstract available},
  language  = {de}
}
@article{HeuerReusch1992,
  author    = {Heuer, D. and Reusch, Wolfgang},
  title     = {Das belastete Potentiometer - Ein Beispiel f{\"u}r Absch{\"a}tzungen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30634},
  year      = {1992},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Ruhe1994,
  author    = {Ruhe, Ernstpeter},
  title     = {Sir{\`e}ne en (n)ixe. Mytheninversion in Mallarm{\´e}s Sonett 'A la nue accablante'},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33863},
  year      = {1994},
  abstract  = {No abstract available},
  language  = {de}
}
@article{DunkelHildelResseguier2007,
  author    = {Dunkel, Franz G. and Hildel, Werner and Ress{\´e}guier, Peter},
  title     = {Hieracium fallax Willd. und weitere Hieracium echioides-Zwischenarten im nordwestlichen Bayern},
  doi       = {10.3264/FG.2007.0427},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35337},
  year      = {2007},
  abstract  = {Die Grenze des riesigen eurasiatisch-kontinentalen Areals von Hieracium echioides Lumn. verl{\"a}uft durch Mitteldeutschland, Zwischenarten aus der Hieracium echioides-Verwandtschaft (sect. Echinina) dringen westlich bis in die Oberrheinebene vor, sind aber im {\"u}brigen S{\"u}den und S{\"u}dosten Deutschlands sehr selten oder fehlen. In den letzten Jahren wurden im Nordwesten Bayerns neue Wuchsorte von Hieracium auriculoides L{\´a}ng (MTB 5526.31, 5924.44, 6125.13, 6223.22), H. calodon Tausch ex Peter (6123.21, 6125.13) und H. fallax Willd. (6223.21) nachgewiesen. Dies stellt den zweiten aktuellen Nachweis von H. fallax in Bayern dar, bemerkenswert ist ein Nachweis von H. auriculoides in der Rh{\"o}n in ca. 700 m Meeresh{\"o}he.},
  subject      = {Habichtskraut},
  language  = {de}
}
@article{Ewald2007,
  author    = {Ewald, J{\"o}rg},
  title     = {Ein pflanzensoziologisches Modell der Schattentoleranz von Baumarten in den Bayerischen Alpen},
  doi       = {10.3264/FG.2007.0803},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35345},
  year      = {2007},
  abstract  = {The ecological niche, as a summary of the environment in which a tree species can live, is a central concept in vegetation ecology and its application in silviculture. While the fundamental niche focusses on the physiological constraints of survival and growth, the realised niche takes competition in real communities into account. To understand realised niches in a causal fashion requires knowledge of the life cycle of plant species. The concept of regeneration niche is based on the notion that establishment and juvenile growth are particularly sensitive stages. Obviously, silviculturalists must be particularly interested in regeneration niches. The database BERGWALD contains 4,934 phytosociological plots from mountain forests and related vegetation types of the Bavarian Alps. The detailed information on plant species composition (trees, tree regeneration, shrubs, herbs and bryophytes) and cover has so far been used extensively for deriving vegetation units, site types and groups of indicator species. In the present study the database content was analysed with regard to the ecology of tree species in general and their regeneration niche in particular. The availability of light as a crucial resource that changes during forest succession was estimated by calculating average Ellenberg indicator values (mL) based on total field and bryophyte layer composition. The relative frequency of plots across the mL gradient in the total database was juxtaposed to the occurrence of the 16 most common tree species in the tree and in the regeneration layer, respectively. [...] As expected, the realised niches of tree species on the light gradient corresponded broadly to Ellenberg's L-value of tree regeneration. As the regional climax, Abies alba and Fagus sylvatica have coincident optima of tree layer and juvenile occurrences in closed, mature stands. Ulmus glabra and Fraxinus excelsior, as species of lower altitude, exhibit niches most similar to these climax species, followed by Acer pseudoplatanus and Picea abies, two of the most frequent species, that occur from low elevations to the timber line. The intermediate role of these four species is confirmed, as regeneration occurs mostly at light levels higher than those found under adult trees of the same species. Against expectations, Taxus baccata clearly prefers stands with moderate to high light, as do Sorbus aria, Sorbus aucuparia and Alnus incana. While Larix decidua and Pinus cembra occupy very similar overall niches, tree layer and regeneration niches of Larix differ markedly, whereas coincident layer niches in Pinus cembra underpin its status as a climax species at tree line. Pinus sylvestris and Salix eleagnos are typical shade-intolerant pioneers, of which regeneration is practically restricted to non-forest vegetation. Pinus rotundata and Juniperus communis are small trees that are entirely restricted to open stands subject to geomorphological activity. The results demonstrate the potential of phytosociological databases for studying the niches of tree species. To be sure, such analyses are no replacement for physiological and experimental studies. The research community is invited to use this source as a reference framework and an empirical validation for more specialised research.},
  subject      = {Baumart},
  language  = {de}
}
@article{Meierott2008,
  author    = {Meierott, Lenz},
  title     = {Cerastium brachypetalum Desp. ex Pers. und Cerastium tenoreanum Ser. (Caryophyllaceae) in Franken},
  doi       = {10.3264/FG.2008.1022},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35354},
  year      = {2008},
  abstract  = {F{\"u}r Cerastium tenoreanum Ser. und die Variet{\"a}ten von Cerastium brachypetalum Desp. ex Pers. werden ihre korrekte Nomenklatur, ihre Unterscheidungsmerkmale und ihre Verbreitung in S{\"u}ddeutschland und Franken mitgeteilt. Die gegenw{\"a}rtige Ausbreitungstendenz annueller Cerastien wird diskutiert.},
  subject      = {Hornkraut},
  language  = {de}
}
@article{GottschlichDrenckhahn2005,
  author    = {Gottschlich, G{\"u}nter and Drenckhahn, Detlev},
  title     = {Iconography of the Genus Hieracium in central Europe - Part 1: General Description and Morphotypes},
  doi       = {10.3264/FG.2005.0502},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35363},
  year      = {2005},
  abstract  = {The genus Hieracium comprises more than one thousand sexual and apomictic species in Europe, with numerous intermediates and microspecies. Only a small fraction of the members of the genus Hieracium has been illustrated or photo-documented in the literature. Since many of these publications are difficult to obtain, only a few specialists are familiar with most of the species and subspecies described in the literature. In order to overcome this problem and encourage geobotanical research on the genus Hieracium, we decided to edit an iconography of central and southern European Hieracia in an electronical journal (Forum geobotanicum) with free international access through the internet. Part I of this endeavour contains descriptions and photographs of the morphological spectrum of the genus Hieracium. Here, we categorize the genus into 15 basic morphotypes. These types conform partly to the sections and subsections of the genus Hieracium, but are in some cases informal and may even include members of different sections. Classification of morphotypes is considered helpful to obtain a first rough picture of an unknown species that then can be traced to the species and subspecies level by using keys or, after completion of this iconography, simply by screening the relevant images. One particularly novel aspect of the present endeavour will be the regular inclusion of magnified images and scanning electron micrographs.},
  subject      = {Habichtskraut},
  language  = {en}
}
@article{Dunkel2005,
  author    = {Dunkel, Franz G.},
  title     = {Zur Kenntnis des Ranunculus auricomus-Komplexes in Deutschland: Ranunculus suborbicularis spec. nova},
  doi       = {10.3264/FG.2005.1222},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35377},
  year      = {2005},
  abstract  = {Die bei Schwarz (1949) als R. vertumnalis abgebildeten Pflanzen entsprechen nicht dem Typusmaterial, sondern weichen durch fast kreisf{\"o}rmige Blattspreiten der Schlussbl{\"a}tter und geringe Blattteilung ab. Sie werden hier als R. suborbicularis spec. nov. beschrieben und mit ihrem Blattzyklus und weiteren Belegen abgebildet. Die bekannte Verbreitung erstreckt sich auf Berlin (wohl erloschen), Th{\"u}ringen und Bayern. Insgesamt ist aufgrund der kleinen Zahl der Populationen eine starke Gef{\"a}hrdung anzunehmen.},
  subject      = {Gold-Hahnenfuß},
  language  = {de}
}
@article{RostanskiMeierott2006,
  author    = {Rostanski, Krzysztof and Meierott, Lenz},
  title     = {Zur Gattung Oenothera L. in Franken - mit besonderer Ber{\"u}cksichtigung von Oenothera stucchii Soldano (neu f{\"u}r Deutschland)},
  doi       = {10.3264/FG.2006.0310},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35388},
  year      = {2006},
  abstract  = {In August 2004 the authors of this report undertook a survey on the Genus Oenothera (evening-primroses) in the valley of the river Main between the cities of Schweinfurt and Bamberg (Bavaria, Lower and Upper Franconia). 22 different taxa were identified, most of which are new to Bavaria, one new for Europe (Oenothera hazelae Gates) and another one new for Middle Europe (Oenothera stucchii Soldano). In this report a list of all Oenothera species found in Franconia is given and Oenothera stucchii, a particular tall (up to > 2 m) species with extremely long Hypanthia of 50-70 mm and fruit capsules with truncated teeth, is described and depicted in more detail.},
  subject      = {Nachtkerze <Gattung>},
  language  = {de}
}
@article{RoederJeschkeKiehl2006,
  author    = {R{\"o}der, Daniela and Jeschke, Michael and Kiehl, Kathrin},
  title     = {Vegetation und B{\"o}den alter und junger Kalkmagerrasen im Naturschutzgebiet "Garchinger Heide" im Norden von M{\"u}nchen},
  doi       = {10.3264/FG.2006.1013},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35397},
  year      = {2006},
  abstract  = {Das Naturschutzgebiet "Garchinger Heide" ist ein Relikt der ehemals ausgedehnten Kalkmagerrasen auf Pararendzinen {\"u}ber Niederterrassenschotter im Alpenvorland. Bei jahrhundertelanger extensiver Landnutzung hat sich auf trockenen n{\"a}hrstoffarmen B{\"o}den eine artenreiche Vegetation mit zahlreichen seltenen und gef{\"a}hrdeten Arten entwickelt. Die "Altheide", welche den gr{\"o}ßten Teil des Naturschutzgebiets einnimmt, ist gepr{\"a}gt durch flachgr{\"u}ndige, n{\"a}hrstoffarme B{\"o}den, welche eine geschlossene Vegetation mit einem hohen Anteil an Arten der Halbtrockenrasen (haupts{\"a}chlich Mesobromion erecti und Cirsio-Brachypodion) tragen. Das 1945 durch Oberbodenabtrag begonnene, aber nicht mehr ausgebaute und verwendete „Rollfeld" weist einen niedrigen Feinbodenanteil, welcher auf eine geringe Wasserverf{\"u}gbarkeit schließen l{\"a}sst, sowie niedrige Gehalte an Gesamtstickstoff und CAL-austauschbaren P2O5 auf. Die Vegetation ist l{\"u}ckig mit einem hohen Anteil an Trockenrasenarten (Xerobromion, Sedo-Scleranthetea, Sesleritalia albicantis). Das heutige Vorkommen zahlreicher Arten, welche in fr{\"u}heren Untersuchungen (1956 und 1986) nicht gefunden wurden, l{\"a}sst auf eine fortschreitende Sukzession der Vegetation des Rollfeldes hin zu der der Altheide schließen. Der 1959 zum Naturschutzgebiet hinzu gekaufte ehemalige Acker unterscheidet sich immer noch deutlich von der Altheide. Eine allm{\"a}hliche Ann{\"a}herung der Standortbedingungen ist jedoch zu beobachten. So sanken die Gehalte an CAL-austauschbarem P_ 2 O_5 und K_2 O im Vergleich zu Werten aus dem Jahr 1993 deutlich ab. Trotz des immer noch hohen Anteils an Gr{\"u}nlandarten (Molinio-Arrhenatheretea) konnten sich im Vergleich zu 1986 mehr Magerrasenarten etablieren.},
  subject      = {Vegetation},
  language  = {de}
}
@article{ArgosDandekar1994,
  author    = {Argos, P. and Dandekar, Thomas},
  title     = {Delineating the main chain topology of four-helix bundle proteins using the genetic algorithm and knowledge based on the amino acid sequence alone},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33807},
  year      = {1994},
  abstract  = {No abstract available},
  subject      = {Proteine},
  language  = {en}
}
@article{HuebnerWissemann2004,
  author    = {H{\"u}bner, Stefanie and Wissemann, Volker},
  title     = {Morphometrische Analysen zur Variabilit{\"a}t von Prunus spinosa L. - Populationen(Prunoideae, Rosaceae) im mittleren Saaletal, Th{\"u}ringen},
  doi       = {10.3264/FG.2004.1215},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35207},
  year      = {2004},
  abstract  = {Prunus spinosa L. (Rosaceae) is one of the most widespread members of the genus Prunus in middle europe. Its morphological plasticity resulted in a number of described taxa at subspecific level. Since the early neolithic times, drupes of the plum family are recorded and exhibit already a remarkable diversity in size and form. Here we present a short historical account to the use of P. spinosa and an overview of the different taxonomic treatments. We examined distribution patterns in general and in particular in the central valley of the river Saale (Thuringia) with respect to ecological, edaphic and climatic factors. We assessed within 16 populations the variability of 22 metric and 10 qualitative morphological characters at 7 different locations. Population sites included forest-, way- and fieldsides, as well as lightish pine forests. Pollen fertility did not increase during the flowering period, all flowers were directly fully fertile from the beginning. In contrast, glucose content varied significantly depending of the status of fertilization. Epicuticular wax structure was without variation amongst the populations. P. spinosa leaves are covered with a smooth layer of slightly striated wax. Morphological characters were scored on 270 branches and 506 fruits. Most of the characters showed enormous variability among and within populations such as metrics of leaves, thorns and character states of flower morphology. The lowest variability among populations and therefore not dependend of modificatory factors was found in fruit characters. Since kernel morphology seems to be genetically rather than modificatory controlled, we applied the 3 taxonomical concepts of Werneck, K{\"u}hn and Scholz u. Scholz to identify evolutionary units at subspecific levels. However, population variability was still so high, that from our study here we can not support an infraspecific classification of Prunus spinosa L.},
  subject      = {Prunus},
  language  = {de}
}
@article{Ewald2004,
  author    = {Ewald, J{\"o}rg},
  title     = {{\"O}kologie der Weißtanne (Abies alba Mill.) im bayerischen Alpenraum},
  doi       = {10.3264/FG.2004.1109},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35193},
  year      = {2004},
  abstract  = {Based on queries of the phytosociological databank BERGWALD, a compilation of 3.504 forest vegetation plots from the Bavarian Alps, the ecological niche of Abies alba is re-assessed. The tree species occurs mostly admixed in mountain forests with Fagus and Picea rather than forming distinctive communities of its own. Climatically, Abies is widely distributed to the upper limit of the montane belt, but occurs only sparsely in subalpine forest. Analysis of Ellenberg indicator values based on total species composition yielded the following results: As a tolerant species Abies regeneration has a marked preference for shady forest, which in turn Abies tree layers themselves help create. It also has a clear preference for acidic topsoil conditions. Sites with low N-supply, such as early successional stages on raw carbonate soils, are rarely colonised by Abies. Also, dry and markedly wet forest sites in the region are avoided by Abies. Permutation-based indicator species analysis found a large number of common forest species as being significantly associated with Abies and its frequent companion Fagus sylvatica, whereas there is a negative relationship with more specialised Seslerion and Erico-Pinion species. As Abies alba has very few specific companion species not shared with either Fagus or Picea, the delimitation of Abietetum-syntaxa appears mostly motivated by ecological rather than phytosociological considerations. As a result of its susceptibility towards game browsing, Abies regeneration is an indicator of high woody species richness. The study broadly confirms Abies alba's status as a climax species intermediate between Fagus and Picea, and demonstrates the potential of large phytosociological databanks for niche modelling.},
  subject      = {Weißtanne},
  language  = {de}
}
@article{Rostas2007,
  author    = {Rost{\´a}s, Michael},
  title     = {The effects of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one on two species of Spodoptera and the growth of Setosphaeria turcica in vitro},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-35079},
  year      = {2007},
  abstract  = {Maize seedlings contain high amounts of glucosidically bound 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA). The effects of DIMBOA on the feeding behaviour and performance of two noctuids, Spodoptera exigua H{\"u}bner and S. frugiperda Smith, were compared. The question was raised whether S. frugiperda, preferring maize and other Poaceae, is better adapted to DIMBOA than S. exigua. In addition, the effects of DIMBOA on the mycelial growth of the plant pathogen Setosphaeria turcica Leonard et Suggs (causal agent of northern corn leaf blight) was assessed in vitro. DIMBOA had an antifeedant effect on S. exigua but stimulated feeding in S. frugiperda in dual-choice experiments. In a no-choice setup, larvae of S. exigua gained less biomass and had a prolonged development when feeding on an artificial diet containing DIMBOA. However, pupal weight was not significantly different between treatments. In contrast, larvae of S. frugiperda were not affected by DIMBOA. Strong detrimental effects of DIMBOA were found on the mycelial growth of the pathogen S. turcica.},
  subject      = {Eulen <Schmetterlinge>},
  language  = {en}
}
@article{Drenckhahn2004,
  author    = {Drenckhahn, Detlev},
  title     = {Neue und wieder entdeckte Hieracien auf R{\"u}gen},
  doi       = {10.3264/FG.2004.0127},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-34843},
  year      = {2004},
  abstract  = {The island of R{\"u}gen (Rugia), located in the Baltic sea, is the most northeastern (NE) part of Germany. Due to its particular geographic position at the border between scandinavian, middle european and continental european floral elements, R{\"u}gen harbours several hawkweed species (Hieracia) of the scandinavian area such as Hieracium fuscocinererum, H. subramosum, H. subrigidum and H. diaphanoides subsp. neoornatum and, at the same time, is the most northwestern location of H. echioides. Two endemic Hieracium species have been identified recently, i. e. H. muorum subsp. rugianum and H. caesium subsp. zabelianum (Gottschlich et al. 1998, Bot. Rundbr. Mecklenburg-Vorpommern 31:1-94). In the present communication, two further novel endemic Hieracium taxa will be described, which are restricted to the chalk cliffs of Cape Arkona and Jasmund, i. e. H. swantevitii and H. lachenalii subsp. litocretaceum. H. swantevitii (Swantevit's hawkweed) is intermediate between H. caesium/H. bifidum and H. lachenalii with hairy, modestly glandular involucre and slightly serrated elongated leaves . This view of an intermediate position of H. swantevitii between these species was further supported by the ultrastructure of epidermal papillae of the outer bracts of the involucre visualized by scanning electron microscopy. H. lachenalii subsp. litocretaceum (chalk cliff hawkweed) is characterized by its narrow anguste to almost linear denticulate leaves in combination with mode rately glandular heads. In addition to the description of these two new hawkweed taxa , the rediscovery of three further species will be reported for R{\"u}gen, i. e. H. echioides (W. Gager in SE R{\"u}gen), H. cymosum subsp. cymosum (close to G{\"o}hren in SE R{\"u}gen) and H. subrigidum E Glowe in N R{\"u}gen. The locality of H. echioides appears to be most north-western site in middle Europe, the locality of H. cymosum is one of the last growth sites in the northern German lowlands and H. subrigidum (so far only known as a single herbarium specimen, collected 1858 in R{\"u}gen) has so far not been recorded in other localities of middle Europe.},
  subject      = {Habichtskraut},
  language  = {de}
}
@article{WuBeckerWaagetal.1991,
  author    = {Wu, Y. S. and Becker, Charles R. and Waag, A. and Bicknell-Tassius, R. N. and Landwehr, G.},
  title     = {The effects of laser illumination and high energy electrons on molecular-beam epitaxial growth of CdTe},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30795},
  year      = {1991},
  abstract  = {We report the results of a detailed investigation on the Te-stabilized (2 x 1) and the Cdstabilized c( 2 X 2) surfaces of ( 100) CdTe substrates. The investigation demonstrates for the first time that both laser illumination and, to a greater extent, high-energy electron irradiation increase the Te desorption and reduce the Cd desorption from ( 100) CdTe surfaces. Thus it is possible by choosing the proper growth temperature and photon or electron fluxes to change the surface reconstruction from the normally Te-stabilized to a Cd-stabilized phase.},
  language  = {en}
}
@article{KleinschmidtScheerDabauvalleetal.1983,
  author    = {Kleinschmidt, J{\"u}rgen A. and Scheer, Ulrich and Dabauvalle, Marie-Christine and Bustin, Michael and Franke, Werner W.},
  title     = {High mobility group proteins of amphibian oocytes: a large storage pool of a soluble high mobility group-1-like protein and involvement in transcriptional events},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33250},
  year      = {1983},
  abstract  = {No abstract available},
  language  = {en}
}
@article{Ruhe1976,
  author    = {Ruhe, Ernstpeter},
  title     = {Nouvelle critique und Strukturalismus},
  isbn      = {3-87452-263-6},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32324},
  year      = {1976},
  abstract  = {No abstract available},
  subject      = {Romanische Sprachen},
  language  = {de}
}
@article{Ruhe1992,
  author    = {Ruhe, Ernstpeter},
  title     = {Centre vide, cadre plein: les Romanesques d'Alain Robbe-Grillet},
  isbn      = {3-8233-4120-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30524},
  year      = {1992},
  abstract  = {No abstract available},
  subject      = {Autobiographie ; Robbe-Grillet},
  language  = {fr}
}
@article{GrafeSchmuckLinsenmair1992,
  author    = {Grafe, T. Ulmar and Schmuck, Richard and Linsenmair, Karl Eduard},
  title     = {Reproductive energetics of the African Reed Frogs, Hyperolius viridiflavus and Hyperolius marmoratus},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31187},
  year      = {1992},
  abstract  = {No abstract available},
  language  = {en}
}
@article{Linsenmair1994,
  author    = {Linsenmair, Karl Eduard},
  title     = {Biologische Vielfalt und {\"o}kologische Stabilit{\"a}t},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31157},
  year      = {1994},
  abstract  = {No abstract available},
  language  = {en}
}
@article{PlakhutinArbuznikov1992,
  author    = {Plakhutin, B. N. and Arbuznikov, Alexei V.},
  title     = {Equations for determination of vector coupling coefficients in systems with two open shells. Ions of transition metals with p\(^M\)d\(^N\) configuration},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30746},
  year      = {1992},
  abstract  = {No abstract available},
  language  = {en}
}
@article{PlakhutinArbuznikovTrofimov1993,
  author    = {Plakhutin, B. N. and Arbuznikov, Alexei V. and Trofimov, A. B.},
  title     = {Coupling coefficients for systems with two open electronic shells: transition metal ions with p\(^M\)d\(^N\) configuration},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30736},
  year      = {1993},
  abstract  = {No abstract available},
  language  = {en}
}
@article{PlakhutinZhidomirovArbuznikov1992,
  author    = {Plakhutin, B. N. and Zhidomirov, G. M. and Arbuznikov, Alexei V.},
  title     = {Vector coupling coefficients for calculations of transition-metal atoms and ions by the SCF coupling operator method},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30702},
  year      = {1992},
  abstract  = {No abstract available},
  language  = {en}
}
@article{MollRoellinghoff1991,
  author    = {Moll, Heidrun and R{\"o}llinghoff, Martin},
  title     = {T-cell reactivity to purified lipophosphoglycan from Leishmania major: A model for analysis of the cellular immune response to microbial carbohydrates.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-33022},
  year      = {1991},
  abstract  = {The major macromolecule on the surface o/Leishmania majorpromastigotes is a lipophosphoglycan (LPG). This glycoconjugate plays a key role in determining infectivity and survival of para-sites in the mammalian host cell. In addition, L. major LPG is able to induce a host-protective immune response. In this article, we summarise the evidence for recognition of highly purified LPG by T cells and we discuss the potential mechanisms of T-cell Stimulation by this non-protein antigen.},
  language  = {en}
}
@article{TiuDavernGarciaetal.1989,
  author    = {Tiu, W. U. and Davern, K. M. and Garcia, E. G. and Moll, Heidrun and Mitchell, Graham F.},
  title     = {Monoclonal antibodies reacting with Schistosoma japonicum eggs and their target epitopes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30916},
  year      = {1989},
  abstract  = {Ten monoclonal antibodies (McAbs) raised to Schistosoma japonicum eggs could be assigned using several serological and immunochemical techniques to 3 groups. The McAbs, termed A, B and C-McAbs, apparently recognize carbohydrate epitopes that can be located on the same antigen molecule. The antibodies, generally of IgM isotype, are idiotypically related. They are distinct from another IgM McAb (Group D-McAb) the carbohydrate target epitope of which can also be associated with the epitopes of A. B and C-McAbs. The McAbs produce large vacuolated bleb reactions in the circumoval precipitin test (COPT) and target epitopes have different representations in various life cycle stages such as immature and mature eggs, male and female worms (including S. mansoni). Antigens affinity purified on columns containing A, B, C and D-McAbs stimulate proliferation of T cells from egg-sensitized mice and elicit DTH reactions in such mice. This raises the possibility that the target antigens of these carbohydrate-reactive monoclonal antibodies are immunopathologic and involved in egg-induced granuloma formation.},
  language  = {en}
}
@article{SolbachBogdanMolletal.1989,
  author    = {Solbach, W. and Bogdan, C. and Moll, Heidrun and Lohoff, M. and R{\"o}llinghoff, M.},
  title     = {Parasit{\"a}re Evasionsmechanismen: Beispiel Leishmanien},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30920},
  year      = {1989},
  abstract  = {Leishmanien besitzen eine Vielzahl von Mechanismen, die humorale und zellul{\"a}re Immunabwehr effektiv zu unterlaufen. Diese h{\"a}ngen eng mit der Expression von haupts{\"a}chlich zwei Glykokonjugaten auf der Parasitenoberfl{\"a}che zusammen, dem gp63 und dem Lipophosphoglykan. Die Parasiten sind einerseits schlechte Aktivatoren des alternativen Komplementweges und umgehen damit ihre eigene extrazellul{\"a}re Lyse. Oberfl{\"a}chengebundene Komplementfaktoren f{\"o}rdern andererseits die Aufnahme der Leishmanien durch Makrophagen. Solange diese nicht durch T-Zellen aktiviert sind, dienen sie den Parasiten als "Refugium". Dies gilt insbesondere, als Leishmanien in der Lage sind, 1. den "oxidative burst" zu hemmen; 2. toxische Sauerstoffmetaboliten zu entgiften; 3. abbauende lysosomale Enzyme zu hemmen und 4. das saure Milieu in den Lysosomen f{\"u}r ihren eigenen Metabolismus auszunutzen. Schließlich unterlaufen Leishmanien die zellul{\"a}re Immunabwehr des Wirts, indem sie die Aktivierung von T-Lymphozyten hemmen und die Expansion von T-Zell-Sub-populationen bewirken, die f{\"u}r ihr eigenes {\"U}berleben n{\"u}tzlich sind.},
  language  = {de}
}
@article{MollMitchell1988,
  author    = {Moll, Heidrun and Mitchell, Graham F.},
  title     = {Analysis of variables associated with the promotion of resistance, and its abrogation, in T cell-reconstituted nude mice infected with Leishmania major},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30949},
  year      = {1988},
  abstract  = {No abstract available},
  language  = {en}
}
@article{KobeltLinsenmair1986,
  author    = {Kobelt, Frank and Linsenmair, Karl Eduard},
  title     = {Adaptations of the reed frog Hyperolius viridiflavus to its arid environment. I. The skin of Hyperolius viridiflavus nitidulus in wet and dry season conditions.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30551},
  year      = {1986},
  abstract  = {Hyperolius viridiflavus nitidulus inhabits parts of the seasonally very hot and dry West African savanna. During the long lasting dry season, the small frog is sitting unhidden on mostly dry plants and has to deal with high solar radiation load (SRL), evaporative water loss (EWL) and small energy reserves. It seems to be very badly equipped to survive such harsh climatic conditions (unfavorable surface to volume ratio, very limited capacity to st{\"o}re energy and water). Therefore, it must have developed extraordinary efficient mechanisms to solve the mentioned Problems. Some of these mechanisms are to be looked for within the skin of the animal (e.g. protection against fast desiccation, deleterious effects of UV radiation and over-heating). The morphology of the wet season skin is, in most aspects, that of a "normal" anuran skin. It differs in the Organization of the processes of the melanophores and in the arrangement of the chromatophores in the Stratum spongiosum, forming no "Dermal Chromatophore Unit". During the adaptation to dry season conditions the number of iridophores in dorsal and ventral skin is increased 4-6 times compared to wet season skin. This increase is accompanied by a very conspicuous change of the wet season color pattern. Now, at air temperatures below 35° C the color becomes brownish white or grey and changes to a brilliant white at air temperatures near and over 40° C. Thus, in dry season State the frog retains its ability for rapid color change. In wet season State the platelets of the iridophores are irregularly distributed. In dry season State many platelets become arranged almost parallel to the surface. These purine crystals probably act as quarter-wave-length interference reflectors, reducing SRL by reflecting a considerable amount of the radiated energy input. EWL is as low as that of much larger xeric reptilians. The impermeability of the skin seems to be the result of several mechanisms (ground substance, iridophores, lipids, mucus) supplementing each other. The light red skin at the pelvic region and inner sides of the limbs is specialized for rapid uptake of water allowing the frog to replenish the unavoidable EWL by using single drops of dew or rain, available for only very short periods.},
  language  = {en}
}
@article{ScheerTrendelenburgFranke1976,
  author    = {Scheer, Ulrich and Trendelenburg, Michael F. and Franke, Werner W.},
  title     = {Regulation of transcription of genes of ribosomal RNA during amphibian oogenesis: a biochemical and morphological study},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32814},
  year      = {1976},
  abstract  = {Natural changes in the transcription of rRNA genes were studied in nucleoli from three oogenic stages of the newt Triturus alpestris with electron microscope, autoradiographic, and biochemical techniques. From determinations of the uridine triphosphate pool sizes and [3H]uridine uptake, phosphorylation, and incorporation into 28S and 18S rRNAs in vivo it was estimated that the rate of rRNA synthesis was about 0.01\% in previtellogenic oocytes and 13\% in mature oocytes when compared to midvitellogenesis. Spread preparations of nucleoli showed significant morphological changes in the transcriptional complexes. The total number of lateral fibrils, i.e., ribonucleoproteins containing the nascent rRNA precursor, were drastically decreased in stages of reduced synthetic activity. This indicates that rRNA synthesis is regulated primarily at the level of transcription. The resulting patterns of fibril coverage of the nucleolar chromatin axes revealed a marked heterogeneity. On the same nucleolar axis occurred matrix units that were completely devoid of lateral fibrils, matrix units that were almost fully covered with lateral fibrils, and various forms of matrix units with a range of lateral fibril densities intermediate between the two extremes. Granular particles that were tentatively identified as RNA polymerase molecules were not restricted to the transcription l complexes. They were observed, although less regularly and separated by greater distances, in untranscribed spacer regions as well as in untranscribed gene intercepts. The results show that the pattern of transcriptional control of rRNA genes differs widely in different genes, even in the same genetic unit.},
  language  = {en}
}
@article{GorboulevAxelrodBayev1977,
  author    = {Gorboulev, Valentin G. and Axelrod, Vladimir D. and Bayev, Alexander A.},
  title     = {Primary structure of baker's yeast valine tRNA\(^{Val}_{2b}\)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32546},
  year      = {1977},
  abstract  = {The minor form of vallne tBNA from baker's yeaat - tRNA\(^{Val}_{2b}\) - purified by column chromatography was completely digesteft with guanylo-BNase and pancreatic ENase. The products of these digestions were separated by a combination of thin-layer chromatography on cellulose and high voltage electrophoresis on DEAE-paper and then identified. The halves of tRNA Val 2b were prepared by partial digestion with pancreatic Mass and their complete guanylo-BNase and pancreatic ENase, digests were analysed. Basing on the obtained data the primary structure of baker1s yeast tRNA\(^{Val}_{2b}\) was reconstructed.},
  language  = {en}
}
@article{DabauvalleLoosMerkertetal.1991,
  author    = {Dabauvalle, Marie-Christine and Loos, Karin and Merkert, Hilde and Scheer, Ulrich},
  title     = {Spontaneous assembly of pore complex-containing membranes ("Annulate lamellae") in Xenopus egg extract in the absence of chromatin},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32797},
  year      = {1991},
  abstract  = {No abstract available},
  language  = {en}
}
@article{WilkenKossnerSenecaletal.1993,
  author    = {Wilken, Norbert and Kossner, Ursula and Sen{\´e}cal, Jean-Luc and Scheer, Ulrich and Dabauvalle, Marie-Christine},
  title     = {Nup180, a novel nuclear pore complex protein localizing to the cytoplasmic ring and associated fibrils},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32049},
  year      = {1993},
  abstract  = {No abstract available},
  language  = {en}
}
@article{Scheer1970,
  author    = {Scheer, Ulrich},
  title     = {The ultrastructure of the nuclear envelope of amphibian oocytes: a reinvestigation. III. Actinomycin D-induced decrease in central granules within the pores.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32110},
  year      = {1970},
  abstract  = {No abstract available},
  language  = {en}
}
@article{FrankeScheerFritsch1972,
  author    = {Franke, Werner W. and Scheer, Ulrich and Fritsch, Hansj{\"o}rg},
  title     = {Intranuclear and cytoplasmic annulate lamellae in plant cells},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32148},
  year      = {1972},
  abstract  = {No abstract available},
  language  = {en}
}
@article{FrankeKartenbeckZentgrafetal.1971,
  author    = {Franke, Werner W. and Kartenbeck, J{\"u}rgen and Zentgraf, Hanswalter and Scheer, Ulrich and Falk, Heinz},
  title     = {Membrane-to-membrane cross-bridges. A means to orientation and interaction of membrane faces},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32122},
  year      = {1971},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ScheerFrankeTrendelenburg1975,
  author    = {Scheer, Ulrich and Franke, Werner W. and Trendelenburg, Michael F.},
  title     = {Effects of actinomycin D on the association of newly formed ribonucleoproteins with the cistrons of ribosomal RNA in Triturus oocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32383},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{FrankeSpringScheeretal.1975,
  author    = {Franke, Werner W. and Spring, Herbert and Scheer, Ulrich and Zerban, Heide},
  title     = {Growth of the nuclear envelope in the vegetative phase of the green alga Acetabularia. Evidence for assembly from membrane components synthesized in the cytoplasm.},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32403},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ScheerFrankeTrendelenburgetal.1976,
  author    = {Scheer, Ulrich and Franke, Werner W. and Trendelenburg, Michael F. and Spring, Herbert},
  title     = {Classification of loops of lampbrush chromosomes according to the arrangement of transcriptional complexes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32822},
  year      = {1976},
  abstract  = {The arrangement of transcriptional units in the loops of lampbrush chromosomes from oocyte nuclei of urodele amphibia and from primary nuclei of the green alga Acetabularia have been studied in the electron microscope using spread preparations. Loops with different patterns of arrangement of matrix units (i.e. to a first approximation, transcriptional units) can be distinguished: (i) loops consisting of one active transcriptional unit; (ii) loops containing one active transcriptional unit plus additional fibril-free, i.e. apparently untranscribed, intercepts that may include 'spacer' regions; (iii) loops containing two or more transcriptional units arranged in identical or changing polarities, with or without interspersed apparent spacer regions. Morphological details of the transcriptional complexes are described. The observations are not compatible with the concept that one loop reflects one and only one transcriptional unit but, rather, lead to a classification of loop types according to the arrangement of their transcriptional units. We propose that the lampbrush chromosome loop can represent a unit for the coordinate transcription of either one gene or a set of several (different) genes.},
  language  = {en}
}
@article{BrabletzPfeufferSchorretal.1993,
  author    = {Brabletz, Thomas and Pfeuffer, Isolde and Schorr, Elke and Siebelt, Friederike and Wirth, Thomas and Serfling, Edgar},
  title     = {Transforming growth factor \(\beta\) and cyclosporin A inhibit the inducible activity of the interleukin-2 gene in T cells through a noncanonical octamer-binding site},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31199},
  year      = {1993},
  abstract  = {Transforming growth factor \(\beta\) (TGF-\(\beta\)) has a growth-inhibitory effect on numerous different cell types of the immune system, including T lymphocytes. We show in this study that the inhibitory action of TGF-\(\beta\) on T lymphocytes is accompanied by a block of interleukin 2 (IL-2) gene expression which is mediated, at least in part, by inhibition of IL-2 promoter/enhancer activity. The functional analysis of cis-regulatory (protoenhancer) elements of the IL-2 enhancer/promoter region showed that the most TGF-\(\beta\)-responsive element maps to its so-called upstream promoter site. The proto-enhancer activity of the upstream promoter site element is also inhibited by cyclosporin A. The upstream promoter site DNA harbors two noncanonical, closely linked binding sequences for octamer and AP-1-like factors. Both sites are involved in the establishment of IL-2 enhancer activity. Since the activity of genuine octamer sites but not that of AP-1-binding sites is also impaired by TGF-\(\beta\) and cyclosporin A in E14 T lymphoma cells, we conclude that both immunosuppressives interfere with the activity but not the DNA binding of octamer factors in T lymphocytes.},
  language  = {en}
}
@article{RiesAlbrightSilvestreetal.1986,
  author    = {Ries, Wolfgang and Albright, Thomas and Silvestre, Jerome and Bernal, Ivan and Malisch, Wolfgang and Burschka, Christian},
  title     = {Unusual structural features of a siloxane},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31925},
  year      = {1986},
  abstract  = {Crystals of the R, S diastereoisomer of [Cp(CO)\(_2\)-FeSiCH\(_3\)F]\(_2\)O are monoclinic, space group ndc (No. 14), with a = 846.0(3) [836.4(1»), b = 768.0(3) [757.1(1»), c = 1548.5(4) [1522.3(2)] pm, {3 = 97.34(3t [97.47(3t] at 300 K [120 K] with Z = 2. Even at 120 K the Si-O-Si fragment is found to be strictly linear due to crystallographically imposed symmetry. To explain the unusual electron distribution derived from the X-ray data collected, several types of possible disorders are discussed, none of which leads to a satisfying explanation. Retaining the Ci symmetry (linear Si-O-Si fragment in the final model) the important bond lengths are Fe-Si 226.7(1) [226.5(1)] pm, Si-F 160.9(2) [161.8(2)] pm, Si-O 160.3(1) [161.1(1)] pm, Si-C 185.0(3) [185.6(3)] pm. The electronic features of this compound were probed via molecular orbital calculations of the extended Hiickel type. It was found that the lone pairs on the siloxane oxygen were tipped away from cylindrical symmetry. The tipping was directed toward the fluorine substituents on the silicon atoms and away from the CpFe(CO)\(_2\) units. A pertubational approach was utilized to rationalize this effect.},
  subject      = {Chemie},
  language  = {en}
}
@article{WieberSchmidtBurschka1985,
  author    = {Wieber, M. and Schmidt, E. and Burschka, Christian},
  title     = {Dimethyl-tellur-bis(alkylxanthogenate)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31934},
  year      = {1985},
  abstract  = {Man erh{\"a}lt Dimethyl-tellur-bis(alkylxanthogenate) des Typs R2Te(S2COR'lz mit R = CH3, sowie R' = CHs, C2Hs, i-CsH7 durch Umsetzung von Dimethyltellur-diiodid mit den st{\"o}chiometrischen Mengen der jeweiligen Natriumxanthogenate. Ebemalls f{\"u}hrt eine Einschiebung von CS2 in die Te-O-Bindung von Dimethyl-tellur-bis(alkoxyden) zu den Dimethyl-tellur-bis(alkylxanthogenaten). Die R{\"o}ntgenstrukturanalyse von (CH3hTe(S2COCH3)2 zeigt, daß das Molek{\"u}l im Kristall als V'-pentagonale Bipyramide vorliegt.},
  subject      = {Chemie},
  language  = {de}
}
@article{WieberWirthBurschka1983,
  author    = {Wieber, M. and Wirth, D. and Burschka, Christian},
  title     = {Methyldixanthogenatostibane},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31952},
  year      = {1983},
  abstract  = {Methyldixanthogenatostibane CH\(_3\)Sb(S\(_2\)COR)\(_2\) erh{\"a}lt man entweder durch Reaktion von Methyldibromstiban mit entsprechenden Natriumxanthogenaten bei tiefen Temperaturen (-78°C) oder durch Einschiebung von CS\(_2\) in Methyldialkoxistibane. Die R{\"o}ntgenstrukturanalyse von CH\(_3\)Sb(S\(_2\)COC\(_2\)H\(_5\))\(_2\) zeigt, daß im Kristall die Chelatliganden das Antimonatom intraund intermolekular koordinieren, so daß eine pentagonal-pyramidale bzw. unter Einbezug des freien Elektronenpaars pentagonal-bipyramidale Koordination am Antimon vorliegt.},
  subject      = {Chemie},
  language  = {de}
}
@article{PeachBurschka1982,
  author    = {Peach, Michael E. and Burschka, Christian},
  title     = {Metal carbonyl complexes of some aromatic ortho bis(methylthio)ethers},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31964},
  year      = {1982},
  abstract  = {Various complexes of the type M(CO)4L and [M(CO)4lzL, M = Cr, Mo, W, have been prepared and characterized. A series of aromatic ortho bis(methylthio)ethers were used as the ligand L. The crystal structures of the free ligand C6(SCH)6 and of the complex Cr(CO)4C6(SCH)6 are reported.},
  subject      = {Chemie},
  language  = {en}
}
@article{BorasioJohnWittinghoferetal.1989,
  author    = {Borasio, Gian Domenico and John, Jacob and Wittinghofer, Alfred and Barde, Yves-Alain and Sendtner, Michael and Heumann, Rolf},
  title     = {ras p21 protein promotes survival and fiber outgrowth of cultured embryonic neurons},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32621},
  year      = {1989},
  abstract  = {Although evidence obtained with the PC12 cell line has suggested a role for the ras oncogene proteins in the signal transduction of nerve growth factor-mediated fiber outgrowth, little is known about the signal transduction mechanisms involved in the neuronal response to neurotrophic factors in nontransformed cells. We report here that the oncogene protein T24-ras, when introduced into the cytoplasm of freshly dissociated chick embryonic neurons, promotes the in vitro survival and neurite outgrowth of nerve growth factor-responsive dorsal rootganglion neurons, brain-derived neurotrophic factor-responsive nodose ganglion neurons, and ciliary neuronotrophic factor-responsive ciliary ganglion neurons. The proto-oncogene product c-Ha-ras also promotes neuronal survival, albeit less strongly. No effect could be observed with truncated counterparts of T24-ras and c-Ha-ras lacking the 23 C-terminal amino acids including the membrane-an-choring, palmityl-accepting cysteine. These results sug-gest a generalized involvement of ras or ras-like proteins in the intracellular signal transduction pathway for neurotrophic factors.},
  language  = {en}
}
@article{SendtnerKreutzbergThoenen1990,
  author    = {Sendtner, Michael and Kreutzberg, Georg W. and Thoenen, Hans},
  title     = {Ciliary neurotrophic factor (CNTF) prevents the degeneration of motor neurons after axotomy},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32637},
  year      = {1990},
  abstract  = {The period of natural cell death in the development of rodent motor neurons is followed by a period of sensitivity to axonal injury1-3. In the rat this early postnatal period of vulnerability coincides with that of very low ciliary neurotrophic factor (CNTF) levels in the sciatic nerve before CNTF increases to the high, adult levels4. The developmental time course of CNTF expression, its regional tissue distribution and its cytosolic localization (as suggested by its primary structure)4*5 favour a role for CNTF as a lesion factor rather than a target-derived neurotrophic molecule like nerve growth factor. Nevertheless CNTF exhibits neurotrophic activity in vitro on different populations of embryonic neurons6. To determine whether the vulnerability of motor neurons to axotomy in the early postnatal phase is due to insufficient availability of CNTF, we transected the axons of newborn rat motor neurons and demonstrated that iocal application of CNTF prevents the degeneration of the corresponding cell bodies.},
  language  = {en}
}
@article{BanachBuenemannHueseretal.1993,
  author    = {Banach, Katrin and B{\"u}nemann, Moritz and H{\"u}ser, J{\"o}rg and Pott, Lutz},
  title     = {Serum contains a potent factor that decreases \(\beta\)-adrenergic receptor-stimulated L-type Ca\(^{2+}\) current in cardiac myocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32027},
  year      = {1993},
  abstract  = {No abstract available},
  language  = {en}
}
@article{DerksenTrendelenburgScheeretal.1973,
  author    = {Derksen, J. and Trendelenburg, Michael F. and Scheer, Ulrich and Franke, Werner W.},
  title     = {Spread chromosomal nucleoli of Chironomus salivary glands},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32209},
  year      = {1973},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ZentgrafScheerFranke1975,
  author    = {Zentgraf, Hanswalter and Scheer, Ulrich and Franke, Werner W.},
  title     = {Characterization and localization of the RNA synthesized in mature avian erythrocytes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32410},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{SpringScheerFrankeetal.1975,
  author    = {Spring, Herbert and Scheer, Ulrich and Franke, Werner W. and Trendelenburg, Michael F.},
  title     = {Lampbrush type chromosomes in the primary nucleus of the green alga Acetabularia mediterranea},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32370},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{EckertFrankeScheer1975,
  author    = {Eckert, W. A. and Franke, Werner W. and Scheer, Ulrich},
  title     = {Nucleocytoplasmic translocation of RNA in Tetrahymena pyriformis and its inhibition by actinomycin D and cycloheximide},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32399},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ScheerFranke1972,
  author    = {Scheer, Ulrich and Franke, Werner W.},
  title     = {Annulate lamellae in plant cells: formation during microsporogenesis and pollen development in Canna generalis Bailey},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32160},
  year      = {1972},
  abstract  = {The occurrence of stacked annulate tamellae is documented for a plant cell system, namely for pollen mother cells and developing pollen grains of Canna generalis. Their structural subarchiteeture and relationship to endoplasmie reticulum (ER) and nuclear envelope cisternae is described in detail. The results demonstrate structural homology between plant and animal annulate lamellae and are compatible with, though do not prove, the view that annulate lamcllar cisternae may originate as a degenerative form of endoplasmic retieulum.},
  language  = {en}
}
@article{Scheer1975,
  author    = {Scheer, Ulrich},
  title     = {The rifamycin derivative AF/013 is cytolytic},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32429},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{DabauvalleLoosScheer1990,
  author    = {Dabauvalle, Marie-Christine and Loos, Karin and Scheer, Ulrich},
  title     = {Identification of a soluble precursor complex essential for nuclear pore assembly in vitro},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32801},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ScheerTrendelenburgFranke1973,
  author    = {Scheer, Ulrich and Trendelenburg, Michael F. and Franke, Werner W.},
  title     = {Transcription of ribosomal RNA cistrons: Correlation of morphological and biochemical data},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32195},
  year      = {1973},
  abstract  = {Electron microscopic spread preparations of oocyte nucleoli (lampbrush stage) of various amphibians are quantitatively evaluated and the length distributions of repeat-, matrix-, and spacer-units along the rRNA cistron containing axes are given. The correlation of the matrix unit data with the gel electrophoretic pattern of labelled nuclear RNA from the same oocytes is examined. The mean value of the matrix unit corresponds fairly well to a 2.6 million D peak of pre-rRNA but the distribution of both matrix units and labelled pre-rRNAs shows an asymmetrical heterogeneity indicating the existence of some larger primary transcription products of rDNA. Novel structural aspects are described in the spacer regions which suggest that transcription does also take place in DNP regions between the matrix units. A special "prelude piece" coding for approx. 0.5 million D of RNA is frequently visualized in the spacer segments at the beginning of a matrix unit. Possible artifacts resulting from the preparation, the relative congruence between the data obtained using both methods, and the functional meaning of the findings are discussed against the background of current concepts of structural organization and transcription products of nucleolar DNA.},
  language  = {en}
}
@article{FrankeTrendelenburgScheer1973,
  author    = {Franke, Werner W. and Trendelenburg, Michael F. and Scheer, Ulrich},
  title     = {Natural segregation of nucleolar components in the course of plant cell differentiation},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32182},
  year      = {1973},
  abstract  = {Segregation of the nucleolar components is described in the differentiated nucleus of the generative cell in the growing Clivia and Lilium pollen tubes. This finding of a natural nucleolar segregation is discussed against the background of current views of the correlations of nucleolar morphology and transcriptional activity.},
  language  = {en}
}
@article{FrankeScheer1970,
  author    = {Franke, Werner W. and Scheer, Ulrich},
  title     = {The ultrastructure of the nuclear envelope of amphibian oocytes: a reinvestigation. II. The immature oocyte and dynamic aspects},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32102},
  year      = {1970},
  abstract  = {No abstract available},
  language  = {en}
}
@article{BeckerWuWaagetal.1991,
  author    = {Becker, Charles R. and Wu, Y. S. and Waag, A. and Kraus, M. M. and Landwehr, G.},
  title     = {The orientation independence of the CdTe-HgTe valence band offset as determined by x-ray photoelectron spectroscopy},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30784},
  year      = {1991},
  abstract  = {No abstract available},
  language  = {en}
}
@article{BeckerLauGEICKetal.1975,
  author    = {Becker, Charles R. and Lau, Ph. and GEICK, R. and Wagner, V.},
  title     = {Antiferromagnetic Resonance in NiO:Co\(^{2+}\) and NiO:Fe\(^{2+}\)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30772},
  year      = {1975},
  abstract  = {No abstract available.},
  language  = {en}
}