Chemical and enzymatic hydrolysis of anthraquinone glycosides from Madder roots
| Autor: | Derksen, G.C.H., Naayer, M., Beek, T.A. van, Capelle, A., Haaksman, I.K., Doren, H.A. van, Groot, Æ. de |
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| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
glucosidase
glycoside Madder root high performance liquid chromatography Hydrolases Lucidin water Anthraquinones Rubiaceae Alizarin xylan 1 4 beta xylosidase Plant Roots Food technology enzyme kinetics purpurin derivative chemical composition suspension controlled study base Glycosides oxidoreductase Nutrition dye nonhuman Molecular Structure Hydrolysis plant root article Temperature mutagenicity Hydrogen-Ion Concentration Rubia tinctorum chemical analysis Ruberythric acid plant extract chemical structure extraction Nordamnacanthal acid sense organs room temperature anthraquinone derivative |
| Zdroj: | Phytochemical Analysis, 3, 14, 137-144 |
| Popis: | For the production of a commercially useful dye extract from madder, the glycoside ruberythric acid has to be hydrolysed to the aglycone alizarin which is the main dye component. An intrinsic problem is the simultaneous hydrolysis of the glycoside lucidin pritneveroside to the unwanted mutagenic aglycone lucidin. Madder root was treated with strong acid, strong base or enzymes to convert ruberythric acid into alizarin and the anthraquinone compositions of the suspensions were analysed by HPLC. A cheap and easy method to hydrolyse ruberythric acid in madder root to alizarin without the formation of lucidin turned out to be the stirring of dried madder roots in water at room temperature for 90 min: this gave a suspension containing pseudopurpurin, munjistin, alizarin and nordamnacanthal. Native enzymes are responsible for the hydrolysis, after which lucidin is converted to nordamnacanthal by an endogenous oxidase. Copyright ©, 2003 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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