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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 78 (1974), S. 1478-1481 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 4 (1974), S. 157-172 
    ISSN: 1432-1432
    Keywords: Hot Hydrogen Atom Reactions ; Molecular Evolution ; Interstellar Chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hot hydrogen atoms which are photochemically generated initiate reactions among mixtures of methane, ethane, water and ammonia, to produce ethanol, organic amines, organic acids, and amino acids. Both ethanol and ethyl amine can also act as substrates for formation of amino acids. The one carbon substrate methane is sufficient as a carbon source to produce amino acids. Typical quantum yields for formation of amino acids are approximately 2–4 · 10-5. In one experiment, 6 protein amino acids were identified and 8 non-protein amino acids verified utilizing gas chromatography-mass spectroscopy. We propose that hot atoms, especially hydrogen, initiate reactions in the thermodynamic non-equilibrium environment of interstellar space as well as in the atmospheres of planets.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 4 (1974), S. 173-178 
    ISSN: 1432-1432
    Keywords: Reactions ; Paraformaldehyde ; Formaldehyde ; Inorganic Compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Both paraformaldehyde and formaldehyde undergo reactions in the presence of several inorganic compounds to generate a variety of interesting organic products that can be important in chemical evolutionary processes. Some examples are acrolein, acetaldehyde, methyl formate, methanol, glycolaldehyde and formic acid. The organic compounds are produced at temperatures as low as 56°C and in high yield (up to 75%). The quantity produced depends principally on the nature of the inorganic compound, the ratio of the inorganic compound to paraformaldehyde, temperature and reaction time. The percent distribution of product depends on some of the foregoing factors.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 251 (1974), S. 719-719 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sera were obtained from five children (aged 4.5?12.5 yr) with CF, and compared with sera from four normal children (aged 5?12 yr). Serum lipids were extracted with chloroform?methanol (2 : I)2 and subjected to thin-layer chromatography on silica gel G using hexane?ether?glacial acetic acid (first ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 13 (1973), S. 305-310 
    ISSN: 1432-0827
    Keywords: Phospholipid ; Bone Matrix ; Synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé L'incorporation et la disparition de l'orthophosphate32P dans les phospholipides sériques et les phospholipides des os diaphysaires et métaphysaires du rat ont été étudiés de 0 à 70 heures. La lécithine, lysolécithine, sphingomyéline et phosphatidyl éthanolamine dans les métaphyses et les diaphyses présentent des types similaires d'apparition et de disparition avec un pic à 24 heures, décroissant progressivement, avec quelques petites différences dans la décroissance des divers phospholipides. La phosphotidyl sérine montre cependant une courbe différente pour la métaphyse et la diaphyse. Dans la région métaphysaire, la phosphotidyl sérine, que l'on peut extraire avant décalcification, montre un profil similaire à d'autres phospholipides mais, après décalcification, le pic apparait plus tôt et décroit plus progressivement. Cependant, dans la région diaphysaire, il augmente graduellement vers un maximum avant décalcification et décroit en quantité après décalcification, avec une valeur minime apparaissant à 70 heures. Ces résultats confirment des études antérieures faisant intervenir la phosphotidyl sérine dans la formation osseuse au niveau de la métaphyse, mais cette substance ne semble pas intervenir dans le turnover osseux diaphysaire.
    Abstract: Zusammenfassung Der Einbau und das Verschwinden von32P-Orthophosphat in den Serum-Phospholipiden und in den Phospholipiden der Metaphysen- und Diaphysenknochen der Ratte wurden von 0 bis 70 Std untersucht. Lecithin, Lysolecithin, Sphingomyelin und Phosphatidyl-Ethanolamin zeigten ähnliche Muster des Erscheinens und Verschwindens in Metaphysen und Diaphysen, mit einer Spitze bei 24 Std und dann allmählichem Absinken, wobei bei der Abfallgeschwindigkeit nur ganz geringe Unterschiede zwischen den verschiedenen Phospholipiden beobachtet wurden. Phosphatidylserin hingegen zeigte ein etwas verschiedenes Muster zwischen Metaphyse und Diaphyse. Im Metaphysenbereich zeigte das extrahierbare Phosphatidylserin vor der Entkalkung ein den anderen Phospholipiden ähnliches Muster, aber nach der Entkalkung wurde die Spitze früher erreicht und das Absinken erfolgte langsamer. Im Diaphysenbereich hingegen stieg es vor der Entkalkung allmählich zu einem Maximum an und verminderte sich nach der Entkalkung, wobei der niedrigste Wert nach 70 Std gemessen wurde. Diese Resultate bestätigen früher publizierte Befunde, welche dem Phosphatidylserin eine Rolle bei der Knochenbildung in der Epiphyse, jedoch keine Beteiligung am Knochenumbau der Diaphyse zuschreiben.
    Notes: Abstract The incorporation and disappearance of32P orthophosphate into serum phospholipids and into the phospholipids of the metaphyseal and diaphyseal bones of the rat were studied from 0 to 70 hours. Lecithin, lysolecithin, sphingomyelin and phosphatidyl ethanolamine in the metaphyses and diaphyses showed similar patterns of appearance and disappearance, peaking at 24 hours and gradually falling, with only slight differences in the rate of fall being seen between the various phospholipids. Phosphatidyl serine, however, showed a somewhat different pattern between the metaphysis and the diaphysis. In the metaphyseal region the extractable phosphatidyl serine before decalcification showed a pattern similar to other phospholipids but after decalcification it peaked earlier and decreased more gradually. However, in the diaphyseal region it gradually rose to a maximum before decalcification and diminished in amount after decalcification with the minimal value appearing at 70 hours. The data support previously published data which implicates phosphatidyl serine in bone formation at the epiphyseal line but do not support a role for this substance in diaphyseal bone turnover.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of low temperature physics 12 (1973), S. 519-527 
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The problem of the calculation of the transition temperature in the proximity effect is considered. From the variational principle of Silvert and Cooper we derive a simpler variational principle which is useful in obtaining a rapid numerical estimate of the transition temperature as well as the qualitative features of the solution. Approximate and exact solutions for the transition temperature and the order parameter are obtained in the clean limit, the geometry investigated being that of a superconducting sphere embedded in an infinite normal matrix. The results for the transition temperature do not display the unphysical behavior found in previous work in the clean limit and suggest that there is a critical radius for the sphere below which the sample is normal at all temperatures. The results for the order parameter show that the nonanalytic behavior discovered by Silvert and Cooper is a relatively small effect in the case investigated.
    Type of Medium: Electronic Resource
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