Abstract
The fatty acid patterns were investigated qualitatively and quantitatively by gas liquid chromatography in monthly intervals. The contents of fatty acids were evaluated as percentage of total fatty acids (shown in table 1) and as percentage of dry weight of barks (table 2). Seventeen different fatty acids were found, twelve of them could be measured quantitatively during the whole year. The most important compounds are palmitic, oleic, linolic, and linolenic acid; myristic, myristoleic and behenic acid are found in considerable amounts, too. During spring another acid is predominating, which was tentatively identified as margarinic acid. During winter the contents of linolenic and especially of linolic acid are raised, the latter being the predominating acid during this season. The amounts of palmitic acid (in % of dry weight) shows only slight variations in the course of the year. Expressed as % of total fatty acids it has a minimum in winter. The findings are discussed in relation to the influence of temperature on storage of lipids and on biosynthesis of fatty acids.
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