As a result of the conducted research the annual dynamics of some free and corresponding sterols in the tissues of birch (Betula pendula) and poplar (Pupolus tremula) that has the regular character is determined. The content and the composition of the sterol ether fatty acid in the shoots of birch (Betula pendula) and poplar (Pupolus tremula) in the annual cycle course are determined. The sterol content in the leaves during the vegetation period is studied.
ethers, sterols, glycosides, annual cycle, fatty acid, oleic acid, linoleic acid
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