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  • Analytical Chemistry and Spectroscopy  (2)
  • Bacteriophages  (1)
  • 1975-1979  (3)
  • 1
    Electronic Resource
    Electronic Resource
    A search for patterns in the nucleotide sequence of the MS2 genome (1979)
    Springer
    Journal of mathematical biology 7 (1979), S. 219-230 
    Details
    ISSN: 1432-1416
    Keywords: Bacteriophages ; Nucleotide sequence ; Spatial Markov chains
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Summary The nucleotide sequence of the RNA of the bacteriophage MS2 was examined by computer for internal patterns. We used a technique which analyzes a nucleotide sequence as a Markov chain. This led us to discover patterns within the translated and untranslated regions of the RNA in addition to those patterns formed by the codons. One of the more surprising results of this analysis was the discovery that the non-coding sequences in the genome are as highly ordered, although in a different sense, as the genes themselves. Also of interest was the discovery that the codon frequency distributions for the three genes are similar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275725
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Shift reagent spectra. The automatic determination of relative bound shifts and the automatic assignment of signals in the parent spectrum. Effects of concentration, temperature and solvent on relative bound shifts (1976)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 8 (1976), S. 483-486 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the use of a shift reagent as an aid in the structural elucidation of organic compounds, it is shown that accurate measurements of the shift reagent and substrate concentrations are not needed to determine the relative bound shifts of the substrate and the chemical shifts of the free substrate spectrum with good precision. This is possible whenever the induced shift ratios of nuclei of a given molecule are independent of the shift reagent concentration. This independence has been verified for all the monofunctional compounds described in this paper. The effect of absolute substrate concentration, solvent, temperature and the presence of water on the relative bound shifts is studied using the eight methyl group signals of β-amyrin. The method is demonstrated by its use for structural determinations in the ketoandrostane series.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270080910
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  • 3
    Electronic Resource
    Electronic Resource
    Metabolic N-oxidation of 3-substituted pyridines: Identification of products by mass spectrometry (1978)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1978), S. 551-556 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectral characteristics of the N-oxides of a range of 3-substituted pyridines, and of quinoline and isoquinoline, are described. The molecular ion is the base peak in the majority of cases, provided that thermolysis is minimized when using the direct probe or gas chromatograph inlets. Chromatographic and mass spectral evidence is presented which indicates that biological oxidation of the heteroaromatic nitrogen of 3-substituted pyridines is a route of metabolism in vivo and in vitro.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200050909
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