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  • Articles  (75)
  • Articles: DFG German National Licenses  (75)
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  • Articles  (75)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 149 (1968), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 2752-2761 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Sub-Doppler excitation spectra of CS2 in the spectral range 30200−32300 cm−1 have been extensively measured with a frequency-doubled single mode cw dye laser in a cold collimated argon beam, seeded with CS2. From the rotational analysis of the measured spectra, the geometry and the position of the barrier to linearity of the CS2 molecule in the excited 1B2(1Δu) state has been determined. The observed bands are heavily perturbed and cluster around some intense vibrational transitions. A statistical analysis of the distribution of these bands showed that no chaotic behavior is present in the considered energy region and therefore a non-linear interaction with highly excited vibrational levels of the ground state cannot be responsible for this irregular vibronic structure, although chaotic regions for vibrational energies E(approximately-greater-than)12000 cm−1 in the electronic ground state have been reported in the literature. Different coupling mechanisms causing the observed perturbations of the rotational and vibrational structure are also discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 5 (1991), S. 0 
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: During carbon-starvation-induced entry into stationary phase, Escherichia coli cells exhibit a variety of physiological and morphological changes that ensure survival during periods of prolonged starvation. Induction of 30–50 proteins of mostly unknown function has been shown under these conditions. In an attempt to identify C-starvation-regulated genes we isolated and characterized chromosomal C-starvation- induced csi::lacZ fusions using the λplac Mu system. One operon fusion (csi 2::lacZ) has been studied in detail. csi 2::lacZ was induced during transition from exponential to stationary phase and was negatively regulated by cAMP. It was mapped at 59 min on the E. coli chromosome and conferred a pleiotropic phenotype. As demonstrated by two-dimensional gel electrophoresis, cells carrying csi 2::lacZ did not synthesize at least 16 proteins present In an isogenic csi 2+ strain. Cells containing csi 2::lacZ or csi 2::Tn10 did not produce glycogen, did not develop thermo-tolerance and H2O2 resistance, and did not induce a stationary-phase-specific acidic phosphatase (AppA) as well as another csi fusion (csi5::lacZ). Moreover, they died off much more rapidly than wild-type cells during prolonged starvation. We conclude that csi 2::lacZ defines a regulatory gene of central importance for stationary phase E. coli cells. These results and the cloning of the wild-type gene corresponding to csi 2 demonstrated that the csi 2 locus is allelic with the previously identified regulatory genes katF and appR. The katF sequence indicated that its gene product is a novel sigma factor supposed to regulate expression of catalase HPII and exonuclease III (Mulvey and Loewen, 1989). We suggest that this novel sigma subunit of RNA polymerase defined by csi 2/katF/appR is a central early regulator of a large starvation/stationary phase regulon in E. coli and propose ‘rpoS’ (‘σs’) as appropriate designations.
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 282 (1990), S. 198-201 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 289 (1981), S. 329-330 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The material studied consisted of the amphibians Rana temporaria (gastrula) and Triturus sp.4 (uncleaved, two-cell and blastula stages) and the teleost Pelvicachromis pulcher5 (Cichlidae; immature and mature eggs). Thin-sectioned specimens were fixed (1% glutaraldehyde/1% OsO4/0.1M phosphate ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 178-179 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Our observations with lupins, reported here, establish the importance of species in nodulation patterns, and suggest that it may be unwise to generalize from limited legume representation to 'legumes'. Lupinus angustifolius L., L. digitatus Forsk., L. luteus L. and L. mutabilis Sweet were ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 295 (1982), S. 264-264 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] LANGE REPLIES - If the symmetric lipoprotein aggregates in yolk platelets of higher anamniotes are orthorhombic crystals as reported for Xenopus laevis1, their space group is P2i2i2i, as documented by symmetry pgg of their axial projections2 at usual electron microscope resolution in eight ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 387-389 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although Tertiary stratigraphy in South Australia is in a state of flux7"12, we have been able to restrict the age range of the fossils discussed here (Fig. 2) to two possibilities within the Tertiary. The alternative correlations presented here permit an Eocene-Oligocene age on the one hand, and ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 96-97 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] About forty species of lichens are known to occur in the southern central and zone in Australia, and twelve of the commonest were exposed to a gas mixture containing nitrogen enriched with nitrogen-15. Thus each lichen was incubated in a Warburg flask for 6 days at 21 C under artificial light, ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 435-435 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Correlations between characters of presentation and characters of shoot architecture were sought among 76 fossil shoots (of 21 different kinds) on characters including, on one hand, length of fossil, whether branched or not, and whether terminal or not, and on the other whether phy Hot axis was ...
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