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  • 1
    Electronic Resource
    Electronic Resource
    Processes dominating forced-flow thin-layer chromatography (1984)
    Springer
    Chromatographia 18 (1984), S. 628-632 
    Details
    ISSN: 1612-1112
    Keywords: Forced-flow TLC ; Overpressured TLC ; Dyestuffs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The effect of the vapor phase and other special influences on thin-layer chromatography have been investigated. Comparisons were made of the relationships of time vs. developing distance and flow rate vs. efficiency using a planar arrangement of the thin-layer. Covering the layer facilitates the reproducibility and of the migration front but the most effective optimization step for thin-layer chromatography is provided by forced-flow of the mobile phase. It is suggested that planar chromatography with a covered sorbent layer and using a pressurised solvent stream should be calledforced-flow thin-layer chromtatography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261978
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thin-layer chromatography of ecdysteroids originated fromSilene otites L. (Wib.) (1988)
    Springer
    Chromatographia 25 (1988), S. 627-630 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF02327660
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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