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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of mathematical biology 15 (1953), S. 385-385 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of mathematical biology 15 (1953), S. 1-13 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The impressed field, “Window Field” (WF), due to a half-wave action potential on a muscle fiber, has been calculated on the basis of potential theory. It has been shown that in spite of the small intensity of the field, its integrated action can transfer the energy needed to induce, contraction from the membrane to the interior of the fiber. The energy of polarization has been found to be sufficient to exceed the energy of, thermal agitation on that length of fiber, which can be identified as the length of a sarcomere. The changes of ion concentration, caused by the WF, if calculated on the assumption of the semipermeability of theZ membranes, was found to be equal to the changes necessary to induce contraction of actomyosinin vitro.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 36-37 (1951), S. 224-238 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Nach Fällung der unlöslichen Chloride und Behandlung mit Salpetersäure zur Entfernung von Zinn und Antimon kann für den Trennungsgang des Restes der „gewöhnlichen“ Kationen mit Natriumsulfat und Ammoniumhydroxyd als Fällungsmittel das Auslangen gefunden werden. Schwefelwasserstoff oder sonstige sulfidhaltige Reagenzien können so vermieden werden. Im Mikromaßstab konnten in diesen Trennungsgang neben den üblichen Kationen auch die Elemente Wolfram, Titan, Molybdän und Zirkon aufgenommen werden.
    Abstract: Résumé Après précipitation des chlorures insolubles et traitement par l'acide nitrique pour éliminer l'étain et l'antimoine, le reste des cations «communs» peut être séparé en employant schématiquement du sulfate de sodium et de l'ammoniaque seulement comme précipitants. Ceci évite l'emploi soit de l'hydrogène sulfuré soit d'un réactif à base d'ion sulfure. A l'échelle micro, ce mode de séparation a été étendu pour inclure le tungstene, le titane, le molybdène et le zirconium avec les cations plus usuels.
    Notes: Summary After precipitation of the insoluble chlorides and treatment with nitric acid to remove tin and antimony, the remainder of the “common” cations may be separated schematically using only sodium sulphate and ammonium hydroxide as precipitants. This avoids the use of either sulphuretted hydrogen or a potential sulphide ion reagent. On the micro scale this mode of separation has been extended to include with the more usual cations the elements tungsten, titanium, molybdenum and zirconium.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 39 (1952), S. 117-120 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein Mikromanipulator, eine Mikroinjektionspipette und eine Feuchtigkeitskammer für ultramikrochemisches Arbeiten werden beschrieben, deren Herstellung mit geringen Kosten möglich ist.
    Abstract: Résumé Description d'un micromanipulateur, d'une microseringue et d'une chambre humide, convenables pour travailler à l'échelle ultramicro et tout à fait bon marché.
    Notes: Summary Descriptions are given of a micromanipulator, a microsyringe and a moist chamber which are useful for work on the ultramicro scale and fairly unexpensive.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 39 (1952), S. 121-125 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine abgeänderte gravimetrische Mikrobestimmungsmethode für Aluminium mittels 8-Oxychinolin wird vorgelegt. Eine Modifikation des Verfahrens vonBenedetti-Pichler ergibt Resultate, die den theoretischen Werten besser entsprechen.
    Abstract: Résumé On propose une méthode révisée pour le microdosage gravimétrique de l'aluminium par l'oxine. Une modification du procédé deBenedetti-Pichler conduit à des résultats qui sont mieux en accord avec la valeur théorique.
    Notes: Summary A revised method for the gravimetric micro-estimation of aluminium with 8-hydroxyquinoline is proposed. Modification of the procedure ofBenedetti-Pichler yields results which are closer to the theoretical value.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 39 (1952), S. 126-132 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Einige Verfahren zur Bestimmung kleiner Eisenmengen (etwa 4 mg) in salzsaurer Lösung wurden geprüft. Die besten Ergebnisse wurden durch manganometrische Titration von mittels Zinn(II)-chlorid reduzierten Lösungen erhalten. Bei gleichzeitiger Ausführung von Blindproben und Verwendung von 0,1-n Kaliumpermanganat ist kein Indikator nötig. Die Fehler dieser Methode sind geringer als nach Reduktion in einem Mikro-Silber-Reduktor und Anwendung desselben Oxydationsmittels. Genaue Vorschriften für die Ausführung dieser Verfahren werden mitgeteilt.
    Abstract: Résumé On a essayé toutes les méthodes pour doser en solution chlorhydrique de très petites quantités de fer (environ 4 mg). Les meilleurs résultats s'obtiennent par titrage manganimétrique d'une solution réduite par le chlorure stanneux. Aucun indicateur n'est nécessaire si l'on emploie un réactif 0,1 N, mais il est recommandé d'effectuer un essai témoin. Les erreurs produites par cette méthode sont souvent plus petites qu'en utilisant les mêmes oxydants après réduction dans le microréducteur à argent. On donne le mode opératoire complet pour l'exécution de ce titrage.
    Notes: Summary Certain methods of estimating very small amounts of iron (about 4 mg) in hydrochloric solution have been tested. The best results are obtained by manganometric titration of a solution reduced by stannous chloride. No indicator is needed if 0.1 N reagent is employed, but running a blank seems to be advisable. The errors in this method are even smaller than using the same oxidant after reduction in the silver microreductor. Full directions for the performance of this titration are given.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 10 (1954), S. 501-502 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Gli autori illustrano una prima serie di esperimenti di iniezioni reciproche di emolinfa tra ceppi con e senza pseudotumori inDrosophila melanogaster esimulans. Soluzione fisiologica ed emolinfa da ceppo sano non determinano formazione di pseudotumori. Emolinfa da ceppo portatore di pseudotumori induce gli stessi in ceppo normale con una frequenza pressocchè proporzionale all'incidenza nel ceppo donatore: questo avviene anche con iniezioni intraspecifiche. Inoltre sembra che la presenza di pseudotumore sia accompagnata da un maggior numero di elementi cellulari presenti nell'emolinfa della larva.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 8 (1952), S. 106-108 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A statistical study founded on 300 elements (Bacillus cereus alesti, with a test:Bombyx mori larvae. Lepidoptera). Capacity for development and virulence respond in a parallel manner to ultraviolet radiation 2537 A; but the inhibition of virulence is more rapid than that of development. Irradiation for 4 to 5 hours gives avirulent elements which are, however, capable of development.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Protoplasma 41 (1952), S. 336-342 
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 60 (1954), S. 157-192 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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