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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of heavy crude oil residues by carbon-13 Fourier transform nuclear magnetic resonance spectrometry (1978)
    s.l. : American Chemical Society
    Analytical chemistry 50 (1978), S. 773-775 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50027a027
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Free-radical addition reactions initiated by metal oxides, VI (1979)
    Springer
    Reaction kinetics and catalysis letters 10 (1979), S. 77-81 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Было исследовано присоединение зтилцианоацетата к 1-децену и зтил 10-ундециленоату, катализированное CuO, термически и ди-трет.-бутилперекисью. Реакция, катализированная CuO, протекает с высокой скоротью уже при 80°C, даваф аддукты с составом 1∶1 с высоким выходом. Эта реакция представляет собой первый пример катализа в реакциях радикального присоединеиня негалогенированных соединений.
    Notes: Abstract CuO catalyzed additions of ethyl cyanoacetate, initiated thermally and by di-tert-butyl peroxide, to 1-decene and ethyl 10-undecylenoate were investigated. The CuO catalyzed reaction proceeds already at 80°C at a high rate, produces 1∶1 adducts in high yields and represents the first example of catalysis in radical addition reactions of non-halogenated compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067516
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of rapid oscillations of glucose and free fatty acids in plasma (1979)
    Springer
    European journal of applied physiology 41 (1979), S. 159-171 
    Details
    ISSN: 1439-6327
    Keywords: Oscillations of blood sugar level ; Oscillations of free fatty acid levels ; Harmonic analysis ; Periodogram in biochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors analyzed rapid oscillations of blood sugar (GL) and free fatty acid levels (FFA) in serum of healthy subjects. They investigated a series of blood samples taken under conditions of absolute rest from the cubital vein at 15-s intervals for a period of 6 min. In addition to common statistical parameters, they calculated the course of autocorrelation and cross-correlation functions and periodograms. The magnitude of oscillations is significantly higher than the error of the biochemical methods. In some sequences periodicities were detected which were statistically significant in 23.8% of GL and in 38.1% of FFA. 24-point series of GL collected in parallel from both arms correlate in 36.3% positively, in 27.3% negatively, and in 36.4% they do not correlate. Series of FFA and GL collected simultaneously from one site correlate mutually in almost all instances either positively or negatively, frequently with a time shift. The oscillations may be due to (a) feedback regulations of the levels of the two metabolites, (b) permanent mutual interaction between the FFA and glucose level and (c) an uneven concentration of the two metabolites in different parts of the circulation. The above factors may combine, and the list of possible factors may not be complete.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430008
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  • 4
    Electronic Resource
    Electronic Resource
    Evaluation of limiting-induced shifts of disubstituted adamantane derivatives on the basis of shift additivity (1975)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 7 (1975), S. 529-531 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A quantitative interpretation of 1H NMR spectra of symmetrically disubstituted adamantane derivatives (2,4-adamantanedione, 2,6-adamantanedione and 2,4-adamantanetdiol) with shift reagents is reported. Assumptions are made of shift additivity and an average coordination of one molecule of the shift reagent to both functional groups. A much better fit between the experimental and the calculated set of limiting-induced shifts was obtained for calculations based on shift additivity.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270071102
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  • 5
    Electronic Resource
    Electronic Resource
    Use of lanthanide shift reagents for the determination of the alkyl conformation in 2-alkyl-2-adamantanols (1977)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 10 (1977), S. 52-55 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The position of the lanthanide atom calculated from the pseudocontact shift equation was studied for 2-adamantanol and 2-methyl-, 2-ethyl-, 2-propyl-, 2-butyl-2-adamantanol. The possible methods of calculation considering rotation of the methyl group were ascertained in the case of 2-methyl- and 2-ethyl-2-adamantanol. It follows from these results that a 2-alkyl group affects the effective position of the lanthanide atom. The conformational analysis of 2-ethyl-2-adamantanol demonstrates a difference among conformations obtained with various shift reagents. A comparison with extended Huckel theory calculations shows that the shift reagent method can be used only for a qualitative determination of the most advantageous conformation of the ethyl group.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270100115
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    Paper (German National Licenses)
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