Reversed-phase high-performance liquid chromatographic separation of the tetrameric lectin concanavalin A from Canavalia ensiformis.
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Chromatography, High Pressure Liquid↗
Biomedical subjects
O Sticher
Publications and source records attributed to O Sticher.
Rapid and sensitive determination of dehydroascorbic acid in addition to ascorbic acid by reversed-phase high-performance liquid chromatography using a post-column reduction system.
An improved procedure for the direct determination of l-dehydroascorbic acid (DHAA), in addition to l-ascorbic acid (AA), has been developed. The two biologically active forms of vitamin C were separated using reversed-phase high-performance liquid chromatography. DHAA was reduced to AA with dithiothreitol (DTT) in a post-column reaction system. Complete conversion was achieved at 50 degrees C using a 1-ml reaction coil. Recoveries were in the range of 95-99% and both forms could be detected spectrophotometrically at 267 nm with high sensitivity. Reproducible results [relative standard deviations 2.4% (DHAA) and 1.0% (AA), n = 5] were obtained when the method was applied to the analysis of rose hip samples.
Ascorbic Acid↗
[Isopimpinellin--a furocoumarin from Heracleum sphondylium with chromosome damaging activity].
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Chromosome Aberrations↗
HPLC separation and quantitative determination of ginsenosides from Panax ginseng, Panax quinquefolium and from ginseng drug preparations. 2nd communication.
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Chromatography, High Pressure Liquid↗
[High-performance liquid chromatographic separation and quantitative determination of arbutin, methylarbutin, hydroquinone and hydroquinone-monomethylether in Arctostaphylos, Bergenia, Calluna and Vaccinium species (author's transl)].
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Arbutin↗
[HPLC separation and quantitative determination of ginsenosides from Panax ginseng, Panax quinquefolium and from Ginseng drug preparations (author's transl)].
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Chromatography, High Pressure Liquid↗
[Identification of bitter substances in Radix gentianae with high pressure liquid chromatography (HPLC)].
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Chromatography, High Pressure Liquid↗
[Glycyrrhizic acid determination in Radix liquiritiae with high pressure liquid chromatography (HPLC)].
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Chromatography, High Pressure Liquid↗
[Detection and isolation of the iridoid glucoside of Galeopsis tetrahit L. (Labiatae) as well as elucidation of the structure of gluroside].
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Glucose↗
[Nature as a source of drugs].
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Computers↗
[Isolation of monotropein from Asperula odorata L. (Rubiacae)].
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Chemistry, Pharmaceutical↗
[Thevesid a new iridoid-glycoside from Thevetia peruviana (Pers.) K. SCHUM. (Thevetia neriifolia Juss.) (Apocynaceae)].
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Chemistry, Pharmaceutical↗
[The composition of genuine, extracted and distilled etheric oils of some Mehntha species].
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Chromatography, Gas↗
[On the antibacterial activity of the lichen islandicus with special reference to compositon. 1].
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Anti-Bacterial Agents↗
A new polyhalogenated monoterpene from the red alga Plocamium cartilagineum.
From a sample of the red alga Plocamium cartilagineum, four polyhalogenated monoterpenes [1-4] were isolated and characterized with (3R*, 4R*)-1-bromo-7-chloromethyl-3,4-dichloro-3-methyl-1E,5E,7-octatrie ne [1] being a new compound. Also reported are antifungal, antibacterial, and molluscicidal activities, as well as the brine shrimp toxicity of these metabolites.
Antifungal Agents↗
Iridoid and phenylethanoid glycosides from Phlomis tuberosa L.
A new iridoid glucoside, 8-O-acetylshanzhiside (1), was isolated from the aerial parts of Phlomis tuberosa, together with two known iridoid glucosides, shanzhiside methyl ester and lamalbide. The known phenylethanoid glycosides acteoside and forsythoside B were also obtained and characterized. The structure of 1 was determined by means of 1D- and 2D-NMR spectroscopic evidence.
Bulgaria↗