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  • 1970-1974  (6)
  • 1910-1914  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Conformational transitions in glycogen phosphorylase reported by covalently bound pyridoxamine derivatives (1974)
    s.l. : American Chemical Society
    Biochemistry 13 (1974), S. 2222-2230 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00707a031
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mass chromatographic analysis of volatiles (1973)
    s.l. : American Chemical Society
    Analytical chemistry 45 (1973), S. 2344-2348 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60336a011
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Metabolic products of microorganisms (1974)
    Springer
    Archives of microbiology 100 (1974), S. 271-282 
    Details
    ISSN: 1432-072X
    Keywords: Iron Transport ; Neurospora ; Sideramine Derivatives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Different derivatives of coprogen B (desacetyl coprogen) and coprogen were prepared to study their iron transport properties in Neurospora crassa arg-5, ota, aga. With increasing N-acyl chain length the rates of iron chelate uptake could significantly be enhanced in the order N-acetyl-〈N-propionyl-〈N-butyryl coprogen B. However, more bulky phenyl derivatives and lipophilic, charge carrying N-acyl derivatives again decreased the uptake rates, although their affinity to the uptake system is increased. On the other hand, structural alterations of the two OH-groups of the anhydromevalonic moieties, like di-O-acetylation and di-O-sucinylation revealed no improvement of the chelate uptake. Di-O-acetyl coprogen showed similar transport properties like coprogen, whereas di-O-succinyl coprogen exhibited a remarkably lower affinity to the coprogen uptake system in Neurospora crassa. The results suggest that the coprogen molecule requires a special hydrophobic area for optimal orientation during uptake and iron release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446323
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Steric acceleration of perester decomposition leading to tertiary alkyl radicals (1974)
    s.l. : American Chemical Society
    The @journal of organic chemistry 39 (1974), S. 3614-3615 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00938a046
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Recent Improvements in Filtration Methods. (1912)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 4 (1912), S. 114-118 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50038a010
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Comets and the formation of planets (1973)
    Springer
    Astrophysics and space science 21 (1973), S. 307-398 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A morphological study of the physical and dynamical processes of planet formation is presented, with emphasis on the intermediary role of comet nuclei. Although guided by a particular model of the evolution of the pre-planetary solar nebula, implying the freezing-out of hydrogen in the region of the giant planets, the derivations and conclusions are of wider import, applicable to other cosmogonic models as well as to certain phases of star formation. The items evaluated physically, dynamically, or statistically comprise: (1) the total number mass of comets in Oort's cloud; (2) a re-evaluation of the diameters and masses of cometary nuclei; (3) the processes of nucleation from gravitational and ‘Boltzmann’ instabilities of gaseous media to agglomerations of particulate matter as conditioned by inbuilt angular momentum; (4) the statistical-dynamical conditions and time scales of orbital interaction of comets with the planets and the consequences of disintegration. A consistent model proposes the formation of comets and planets in pre-planetary rings of the residual solar nebula, with subsequent ejection, chiefly by Jupiter, of the comets to Oort's sphere. Screening by absorbing matter is not only probable, but necessary to protect the comets from dis-integration during the process of ejection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00643104
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  • 7
    Electronic Resource
    Electronic Resource
    Intrinsic viscosity calculated by computer (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 1449-1454 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A computer program has been devised for routine use which processes raw data such as polymer sample weight, moisture content, solution volume, and viscometer flow times to calculate a least-squares-derived intrinsic viscosity. In addition to eliminating errors inherent in graphic solutions and freeing technicians from tedious calculation, the computer output provides the 95% confidence interval of the intrinsic viscosity.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1973.070170512
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    Paper (German National Licenses)
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