PRODUCTION AND PROPERTIES OF DRY EXTRACTS OF BLACK CURRANE LEAVES
Abstract
Black currant being a widespread Russian culture is of interest as a source of biologically active substances due to its easy accessibility and renewability.
Both berries and its leaves contain biologically active substances capable of exhibiting antioxidant properties, the chemical structure of which is accessible to the enzymatic systems of the human body. The paper presents the results of the investigation of the composition and properties of thick extracts obtained from black currant leaves with successive treatment of plant material with a number of organic solvents (hexane, acetone, 70% ethanol) in order of increasing their polarity, followed by distillation of the extractants. In the obtained extracts, biologically active substances such as flavonoids, chlorophylls and carotenoids are quantitatively determined. According to the content of chlorophylls and carotenoids, acetone extract is the leader and alcoholic extract is the leader in the content of flavonoids. The extract obtained with the use of acetone, contains the greatest total amount of biologically active substances. An evaluation of the antioxidant activity of the extracts was carried out using oxidation of adrenaline by air oxygen as a model reaction. It is shown that the rate of its oxidation decreases 3 to 5 times in the presence of extracts of the leaves of black currant. Acetone thick extract shows the greatest inhibitory ability.
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