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  • 1965-1969  (2)
  • 1950-1954  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Zur Frage der gestagenen Wirkung des Desoxycorticosteron und des Testosteron (1952)
    Springer
    Journal of molecular medicine 30 (1952), S. 1009-1011 
    Details
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Wir prüften die Frage, ob bei der Frau zugeführtes Testosteron und Desoxycorticosteron im Organismus in Progesteron umgewandelt werden kann. Auf Grund experimenteller und klinischer Beobachtungen war diese Möglichkeit beim Desoxycorticosteron als wahrscheinlich anzusehen, für das Testosteron von anderer Seite gefordert worden. Frauen, bei denen mit einer Progesteronbildung durch die Ovarien nicht zu rechnen war, erhielten Testosteron und Desoxycorticosteron in verschiedenen Dosierungen intramuskulär injiziert. Mit dem Hooker-Forbes-Test wurde im Blute nichtgebundenes Progesteron gesucht. Nach Desoxycorticosteronzufuhr ließ sich eine Hooker-Forbes-Aktivität, welche verhältnismäßig großen Progesteronmengen entspricht, im Blute nachweisen. In Übereinstimmung mit tierexperimentellen Beobachtungen läßt sich somit auf eine Umwandlung des Desoxycorticosteron in Progesteron auch im Organismus der Frau schließen. Nach Testosteroninjektionen (bis zu 500 mg tgl.) ließ sich nur bei 2 von 9 Frauen eine geringfügige Hooker-Forbes-Aktivität im Blute nachweisen. Es besteht kein Grund zu der Annahme, daß sie aus dem Testosteronstoffwechsel stammt. Die Wahrscheinlichkeit erscheint größer, daß diese Aktivität durch Steroide bedingt ist, welche aus der Nebennierenrinde kommen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01533447
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Fundamentals of plasticating extrusion. II. Experiments (1966)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 6 (1966), S. 191-197 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: Experiments were performed to develop quantitative information for designing plasticating extruders for low density polyethylene. Screw design variables explored included feed section length, compression section taper, and minimum channel depth. Operating variables included were screw speed, barrel temperature, and back pressure. A moving picture film illustrates temperature action and cross-channel temperature distribution for some typical experiments using a new type of extruder screw for 2.5 inch and 8 inch diameter extrusion. The information gathered was used to obtain relations between performance and screw dimensions and revealed an optimum combination of feed section length and compression taper.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760060304
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Properties of semicrystalline polyolefins. II. Copolymers of 3-methyl-1-pentene and 4-methyl-1-pentene (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 933-940 
    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 study of the copolymerization of 3-methyl-1-pentene (3-MP) and 4-methyl-1-pentene (4-MP) showed that the poly-4-MP crystal lattice is capable of incorporating large quantities of 3-MP without a sharp lowering of melting point or adverse effect on physical and mechanical properties. The reactivity ratio of the two monomers in copolymerization are r(4-MP) = 6.2 ± 0.2 and r(3-MP) = 0.1 ± 0.1. As a result, mixed feeds containing up to 80% 3-MP produce copolymers composed primarily of repeating 4-MP units, with a random insertion of 3-MP monomer units. Calculations indicate that in a copolymer containing 37% 3-MP, the probability of finding a sequence of 2 units of 3-MP is only a little better than 5%. This copolymer shows a somewhat increased resistance to deformation under load than homopoly 4-MP. Its crystalline melting point is 248°C.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090311
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    Paper (German National Licenses)
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