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  • Articles  (5)
  • Analytical Chemistry and Spectroscopy  (4)
  • Biochemistry and Biotechnology  (1)
  • Astronomy
  • 1970-1974  (5)
  • 1
    Electronic Resource
    Electronic Resource
    The tubular loop batch fermentor: Basic concepts (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 16 (1974), S. 1261-1272 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A tubular loop batch fermentor has been designed and constructed, and was found to behave in a similar manner to a conventional stirred tank reactor. It appeared that foaming could be greatly reduced as no air ever encountered the impeller. The fluid mechanics of pipe flow are considerably simpler than tank flow patterns. On this basis a design procedure for a large scale tubular fermentor was outlined, which had considerable advantages over the more complex scale-up problems of a tank fermentor.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260160909
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Linewidth variation in the dinitronitrosomethyl dianion radical in the slow exchange mode (1970)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 2 (1970), S. 605-611 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The treatment of nitromethane or dinitromethane in aqueous alkaline solutions (1 to 2·5 M hydroxide) with nitrogen dioxide yields the dianion radical of dinitronitrosomethane [C(NO2)2(NO)\documentclass{article}\pagestyle{empty}\begin{document}$ \buildrel\textstyle.\over= $\end{document}] which at 30° has hfsc of aNNO2 = 10·75 and 0·65 and aNNO = 5·80 g. Restricted rotation about the C—NO bond causes magnetic non-equivalence of the two nitro groups which can slowly exchange giving rise to line broadening. The use of 15N labeled nitrogen dioxide gave the dianion radical \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm [C(}^{{\rm 15}} {\rm NO}_{\rm 2} {\rm)(}^{{\rm 14}} {\rm NO}_{\rm 2} {\rm)(}^{{\rm 15}} {\rm NO)} \buildrel\textstyle.\over= {\rm]} $$\end{document} which exists in two equally populated conformations, each of which shows the expected line broadening for a ‘slow exchange’ process in which the nitro groups are being interconverted.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270020610
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  • 3
    Electronic Resource
    Electronic Resource
    The NMR spectra of 1,4-dioxin and 1,4-dithiin partially oriented in a nematic phase (1972)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 4 (1972), S. 433-439 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The PMR spectra of 1,4-dioxin and 1,4-dithiin have been studied in nematic phase liquid crystalline solvents. The ratio of the interproton distances r12 and r13 and the CCH angles have been determined.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270040310
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectra of some 5- and 6-substituted-2-pyridinecarboxylic acids. Nature of fragmentation step for loss of CO2 (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 555-561 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fragmentation patterns were obtained by electron-impact on 6-acetamido-, 6-amino-, 6-bromo-, 6-chloro-, 6-methoxy-, 6-methyl-, 6-nitro-, 5-carboxy-, 5-iodo-, 5-methoxy- and 5-nitro-2-pyridinecarboxylic acids, as well as 2- and 3-pyridinecarboxylic acids. Most of these acids lost CO2 [M - 44] as their first major fragmentation. This is in direct contrast to the substituted benzoic acids which show loss of OH [M - 17] or CO2H [M - 45] in their first major fragmentation. Our work suggests that the ring nitrogen may determine which pathway predominates. Figures are presented to illustrate the patterns and metastable ions are indicated when found for the transitions discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040156
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  • 5
    Electronic Resource
    Electronic Resource
    Semidiones - XFor Part IX, see Ref. 1.. Radical anions derived from 1,1,2,2-bis(1,3-diketo-2,2-bindanylidene)ethane and 1,1,4,4-bis(1,3-diketo-2,2-bindanylidene)butene-2 (1970)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 2 (1970), S. 191-195 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1,1,2,2-bis(1,3-diketo-2,2-bindanylidene)ethane radical anion (13) and 1,1,4,4-bis (1,3-diketo-2,2-binanylidene)butene-2 radical anion (14)We employ herein nomenclature wherein the term ‘radical anion’ means the gain of one electron of the named substrate. representing 1,6- and 1,8-conjugated semidiones have been prepared by reduction. Electron spin resonance hyperfine splitting constants have been assigned on the basis of Hückel and McLachlan calculations.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270020212
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