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  • 1
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Ecdysteroids, phytoecdysteroids ; 2-deoxy-1,20-dihydroxyecdysone ; 2-deoxyecdysone-22-acetate ; 2-deoxy-20-hydroxyecdysone-22-acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Thin-layer chromatographic investigations of ecdysteroids have been carried out to monitor their isolation by column chromatography and droplet countercurrent chromatography as well as to control the homogeneity of the pure products. Isolation scheme and chemical structure of the 20-hydroxyecdysone-22-benzoate and that of three new ecdysteroid compounds, 2-deoxy-1,20-dihydroxyecdysone, 2-deoxyecdysone-22-acetate and 2-deoxy-20-hydroxyecdysone-22-acetate are also presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 272 (1974), S. 22-24 
    ISSN: 1618-2650
    Keywords: Abtrenn. von Calcium ; Chromatographie, Gel ; Sephadex, Biogel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The behaviour of calcium ions in calcium chloro-complex form on Biogel P 2 and Sephadex G 15 columns has been investigated at different temperatures. The data suggested that the interaction is an absorptive process. Total separation of calcium ions from organic substances has been achieved by means of gel chromatography carried out at a changed temperature after a partial separation had been made.
    Notes: Zusammenfassung Das Verhalten von Calciumionen in Form des Calcium-chlorokomplexes wurde an Biogel P 2 und Sephadex G 15 bei verschiedenen Temperaturen untersucht. Aus den Ergebnissen ließ sich auf einen Absorptionsprozeß schließen. Eine Trennung der Calciumionen von organischen Substanzen konnte durch Gel-Chromatographie bei veränderter Temperatur nach teilweiser Vortrennung erreicht werden.
    Type of Medium: Electronic Resource
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