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  • 1985-1989  (6)
  • 1965-1969  (3)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Towards an understanding of stacked base interactions: non-equilibrium phase transitions as a probable model (1986)
    Springer
    Polymer bulletin 15 (1986), S. 89-91 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The distances of stacked bases of DNA in different conformations can-not be calculated by equilibrium potentials, since they exhibit not more than only one minimum. However, a double potential minimum is obtained by considering the most simple semiclassical model of excitons that are coupled adiabatically to lattice vibrations, hence forming polaritons. By use of Danilov's extended Hückel approximation of DNA excitons, stacked base distances can be calculated that agree fairly well with the experimental data. The errors of this approach are small as compared to the differences of the distances in various conformations. Consequently, this model may work as a first base of understanding molecular interactions in DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263498
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Concluding remarks (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 599-600 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01953308
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Sex-Chromatin bei einer Locustide (1968)
    Springer
    Naturwissenschaften 55 (1968), S. 138-138 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624260
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Chromatin structure and ribosomal genes in Vici faba (1987)
    Springer
    Naturwissenschaften 74 (1987), S. 299-299 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366423
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Modelling of alcohol fermentation in a tubular reactor with high biomass recycle (1988)
    Springer
    Bioprocess and biosystems engineering 3 (1988), S. 135-140 
    Details
    ISSN: 1432-0797
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Fermentation in tubular recycle reactors with high biomass concentrations is a way to boost productivity in alcohol production. A computer model has been developed to investigate the potential as well as to establish the limits of this process from a chemical engineering point of view. The model takes into account the kinetics of the reaction, the nonideality of flow and the segregation in the bioreactor. In accordance with literature, it is shown that tubular reactors with biomass recycle can improve productivity of alcohol fermentation substantially. With the help of the computer based reactor model it was also possible to estimate the detrimental effects of cell damage due to pumping. These effects are shown to play a major role, if the biomass separation is performed by filtration units which need high flow rates, e.g. tangential flow filters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373477
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Banded Polytene Chromosomes in the Legume Phaseolus vulgaris (1969)
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 70-71 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Polytene chromosomes of suspensor cell nuclei of Phaseolus vulgaris. a, Grown at 20?25 C; b, cooled to 8?12 C 2 weeks before fixation. (Phase contrast, 1,200.) Plants of Phaseolus vulgaris were grown in a regimen of 13 h light and 11 h dark with 65 per cent relative humidity, and at a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/221070b0
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Correlation of structure and RNA synthesis in the nucleolus-organizing polytene chromosomes of Phaseolus vulgaris (1969)
    Springer
    Chromosoma 28 (1969), S. 85-92 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The relationship between RNA synthesis and morphology of the nucleolus-organizing polytene chromosomes in the highly endopolyploid suspensor cells of Phaseolus vulgaris has been studied by actinomycin D treatment, temperature lowering, and H3-uridine autoradiography. Actinomycin D and low temperature induce a condensation of the giant chromosomes, particularly of the nuoleolus organizers and of the intranucleolar regions of the chromosomes. RNA synthesis occurs in the extended state of the chromosomes, but it ceases in the highly condensed state caused by the treatment of the cells either with actinomycin D or with low temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325992
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Transcription of repetitive DNA in condensed plant chromatin (1985)
    Springer
    Molecular biology reports 10 (1985), S. 143-146 
    Details
    ISSN: 1573-4978
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polyadenylated transcripts homologous to highly repetitive DNA were found in root tips ofVicia faba by Northern blot hybridization. Electron microscope autoradiography using [3H]uridine as a probe revealed transcription of condensed chromatin in various higher plants. This is consistent with the general rule that highly repetitive DNA is located within condensed chromatin, but it is new that this chromatin fraction is active in RNA synthesis to a considerable amount. Semi-quantitative comparison of the intensity of transcription in species with widely differing 2C DNA contents by means of light microscope autoradiography revealed an inverse relationship between the amount of 2C DNA (and condensed chromatin), and the rate of RNA synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00778519
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 623-624 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289204
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    Paper (German National Licenses)
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