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  • Springer  (10)
  • Nature Publishing Group  (5)
  • American Chemical Society (ACS)
  • American Meteorological Society (AMS)
  • Copernicus
  • 1960-1964  (7)
  • 1940-1944  (8)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 1122-1123 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Time-regulation of the temperature-dependent moulting and regeneration processes may involve some temperature-independent factors such as illumin ation. Preliminary to a study of possible photoperiod effects, an investigation of the influence of single changes in illumination on moulting and ...
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHILE investigating the extracellular esterase of group A streptococci, it became necessary to have a direct method for the demonstration of the electrophoretic mobility of streptolysins O and S. A slight modification of the procedure of Uriel8 for the direct detection of proteolytic enzymes after ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 257-258 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using a modified McBain-Bakr balance we have measured the partition isotherms of a number of vapours in a variety of liquids commonly used as stationary phases in gas-liquid chromatography. The method was as follows: a small sample of 'Celite' coated with the liquid stationary phase was weighed ...
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  • 4
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the effects produced by the growth of tumours in man and experimental animals seems to be an alteration of the composition of the blood-serum protein. This phenomenon has been described by several authors1-3. An increase of an acid-soluble nitrogen fraction, which is not precipitated by weak ...
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 20 (1964), S. 495-496 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die fettsäurenmobilisierende Wirkung des Tyramins an Ratten liess sich durch Vorbehandlung mitα-Methyl-m-Tyrosin, nicht jedoch mitα-Methyl-Dopa verhindern.In vitro war die lipolytische Wirkung des ausα-Methyl-Dopa entstehendenα-Methyl-Noradrenalin (Corbasil) mehr als 1000mal stärker als diejenige des ausα-Methyl-m-Tyrosin entstehenden Metaraminol (Aramin).
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 30 (1942), S. 128-136 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary (L) We have completed different points of our former paper on the micro-determination of very small quantities of Hg, and especially for the analyses of pure HgCl2 solutions, and the case when Hg is present in the laboratory atmosphere. It is added: That the excess of chlorine is eliminated by hydroxylamine instead of by heating. Electrolysis can be carried out even if the HCl concentration or the volume of the electrolyte (up to 100 ccm.) is great. If one keeps to the known precautions in the distillatio nof Hg, the determination of the smallest quantities of Hg, below 0,1γ, can be done with sufficient accuracy even without cooling the receptor by liquid air. The determination of Hg in the reagents HCl, KClO3 and hydroxylamine hydrochloride is given. The lately issued paper ofReith andvan Dijk on a microanalytical determination of Hg with dithizon is discussed.
    Abstract: Résumé (W) Nous complétons les prescriptions que nous avons déjà données pour le microdosage de très petites quantités de mercure; et ceci pour diverses raisons, notamment dans le cas d'analyses de solution de HgCl2 pur, ou d'analyses conduites dans une atmosphère contenant de la vapeur de mercure. Il faut relever les faits suivants: l'excès de chlore n'est plus éliminé par chauffage, mais au moyen d'hydroxylamine. L'électrolyse peut être conduite sans inconvénient en présence d'une importante quantité d'HCl et dans un volume plus considérable de l'électrolyte (jusqu'à 100 cmc.). En observant certaines précautions, lors de la distillation du mercure, on parvient à doser avec assez d'exactitude de très petites quantités de mercure, inférieures à 0,1γ, et cela sans refroidir le récipient avec de l'air liquide. On donne un procédé simple de détermination du mercure dans les réactifs nécessaires, HCl, KClO3 et chlorhydrate d'hydroxylamine. Il est fait mention d'un récent article deReith etvan Dijk sur un microdosage du mercure au moyen de la dithizone.
    Notes: Zusammenfassung Unsere früheren Vorschriften für die mikrometrische Bestimmung kleinster Hg-Mengen werden in verschiedener Hinsicht ergänzt, insbesondere für die Analyse reiner HgCl2-Lösungen und für den Fall, daß die Luft im Arbeitsraum Hg-haltig ist. Hier sei hervorgehoben: Das überschüssige Cl wird statt durch Erwärmen mit Hydroxylamin beseitigt. Die Elektrolyse ist auch bei größerem HCl-Gehalt und größerem Volum des Elektrolyten (bis zu 100 ccm) anstandslos durchzuführen. Unter Einhaltung gewisser Vorsichtsmaßregeln beim Abdestillieren des Hg läßt sich die Bestimmung der kleinsten Hg-Mengen, unter 0,1γ, auch ohne Kühlen der Vorlage mit flüssiger Luft genügend genau vornehmen. Es werden einfache Verfahren zur Hg-Bestimmung in den benötigten Reagenzien HCl, KClO3 und Hydroxylaminhydrochlorid angegeben. Die kürzlich erschienene Arbeit vonReith undvan Dijk über eine mikroanalytische Bestimmung des Hg mit Dithizon wird besprochen.
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 656-658 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To ascertain this assumption, experiments were now performed with epinine, which should also be deaminated by MAO to yield the same aldehyde: HO/\CH2CH2 MAO HO. HOLj NH2 ~" HOI CH2CHO MAO HOX\ "HO-V iCH2CH2 NH-CH., dopamine dihydroxyphenyl acetic aldehyde epinine It was found, however, ...
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  • 8
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 119 (1940), S. 425-427 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 122 (1941), S. 294-298 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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