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Summary NH2OH as well as H2O2 (previous results3,4) decompose the Cu2+ complex of polymyxin B as can be shown with thin layer chromatography; the spots of the peptide fragments of both reactions were compared. 相似文献
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Summary The catalysis of H2O2 decomposition by Cu2+-complexes of RNA and DNA has been investigated. It is shown that both complexes decompose H2O2, but only the Cu2+-RNA-system shows peroxidative activity too, e.g. only in this case the nucleotide bases are degraded. Thermal denaturation of DNA also leads to a Cu2+-complex with peroxidative activity, the latter being dependent on the degree of denaturation.
V. Mitteilung:S. Petri, H. Sigel undH. Erlenmeyer, Helv. chim. Acta49, 1778 (1966).
12. Mitteilung überMetallionen und H 2 O 2; 11. Mitteilung:H. Ch. Curtius, P. Anders, R. Zell, H. Sigel undH. Erlenmeyer, Helv. chim. Acta49, 2256 (1966). 相似文献
V. Mitteilung:S. Petri, H. Sigel undH. Erlenmeyer, Helv. chim. Acta49, 1778 (1966).
12. Mitteilung überMetallionen und H 2 O 2; 11. Mitteilung:H. Ch. Curtius, P. Anders, R. Zell, H. Sigel undH. Erlenmeyer, Helv. chim. Acta49, 2256 (1966). 相似文献
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J. Weiss 《Cellular and molecular life sciences : CMLS》1956,12(7):280-281
Zusammenfassung Theoretische Überlegungen führen zur Annahme, dass das in der Gasphase wohlbekannte Molekülion H2O+ auch in wässeriger Lösung unter geeigneten Bedingungen eine gewisse Stabilität besitzt. Es ist zu erwarten, dass dieses Ion, welches als protoniertes OH-Radikal aufgefasst werden kann, bei Reaktionen in saurer, wässeriger Lösung eine gewisse Rolle spielt. 相似文献
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Summary It has been proved that Fe(OH)2, precipitated in alkaline solution and oxidated by air-oxygen, transforms to -FeOOH. In presence of A13+, besides -FeOOH magnetite also appears. 相似文献
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R. Zell H. Brintzinger B. Prijs H. Erlenmeyer 《Cellular and molecular life sciences : CMLS》1964,20(3):117-119
Summary Cytostatic -aminoketones are found to produce H2O2 on autoxidation. Possible pathways of radical and peroxidative reactions in cytostatic therapy are discussed. 相似文献
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Summary The activity of several enzymes in cross sections of the M. latissimus dorsi of the adult chick was examined. In the slow anterior latissimus dorsi muscle — which is thought to be composed of fibres of identical physiological properties — certain topochemical differences of the fibres are described. 相似文献
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L J Anghileri 《Experientia》1975,31(12):1391-1392
High extracellular concentration of Ca2+ inhibits the incorporation of 32P into the cellular phospholipids. This effect is more significant in neoplastic than in normal cells, and it is accompanied by an increase of the percentual incorporation into the lecithin fraction. 相似文献
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H. Dransfeld K. Greeff D. Hess A. Schorn 《Cellular and molecular life sciences : CMLS》1967,23(5):375-377
Summary In isolated mitochondria of heart muscle from rabbits and oxen there is, under suitable conditions, an accumulation of Ca++, which is significantly enhanced by elevating the K+/Na+ quotient of the incubation medium. K-strophanthine (10–5–10–7) does not influence the accumulation of Ca++ by the mitochondria of heart muscle. Therefore the intracellular increase in exchangeable Ca++ observed after digitalis-glycosides could be explained by a decrease of the intracellular K+/Na+ quotient, which is caused by inhibition of the membrane ATPase and diminishes the capacity for Ca++ accumulation in mitochondria. 相似文献
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E. Demole 《Cellular and molecular life sciences : CMLS》1964,20(11):609-610
Summary The semi-industrial production of the odorous oxides IIIab (overall yield 24%) has been achieved by combining the selective epoxidation of manool (I) in a relatively concentrated solution with the ozonolysis of the resulting epoxide (IV).
Ce travail a fait l'objet d'une communication devant la Société Chimique de Genève, le 8 juin 1962.
Nous remercions la Direction de la Maison Firmenich & Cie., Genève, ainsi que le Dr.M. Stoll, Directeur scientifique, de l'autorisation de publier ce travail. 相似文献
Ce travail a fait l'objet d'une communication devant la Société Chimique de Genève, le 8 juin 1962.
Nous remercions la Direction de la Maison Firmenich & Cie., Genève, ainsi que le Dr.M. Stoll, Directeur scientifique, de l'autorisation de publier ce travail. 相似文献
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D. Kuhlmann 《Cellular and molecular life sciences : CMLS》1971,27(6):690-691
Summary It has been demonstrated by injections of H3-Thymidine into adult and juvenile snails (Helix pomatia) that the mitotic activity in the central nervous system, the connective tissue and epidermis was generally higher in juvenile animals than in adult ones. Data are given for the amount of triated thymidine labelled nuclei in the tissues, which are investigated. 相似文献
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A. R. Tebar A. Ballesteros J. Soria 《Cellular and molecular life sciences : CMLS》1977,33(10):1292-1294
Summary ESR binding studies of Mn2+ with each of the substrates and products suggests that substrate bridge complexes are formed in the reaction. This prediction is confirmed, comparing Mn2++ADP and Mn2++ADP+enzyme spectra.We thank V. M. Fernández for helpful discussions. 相似文献
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The present results, using isolated rat aortic strips and portal vein segments, demonstrate that ethanol (170--430 mM) significantly inhibits calcium uptake in these 2 different types of vascular smooth muscle. 相似文献