海洋性小型歯鯨"スジイルカ"の血液中の脂肪酸

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The compositions or quantities of free short-chain acids in plasma, of free and esterified short-and long-chain acids in plasma protein, and of long-chain acids in blood corpuscle lipids werestudied with adult whales Stenella caeruleo-alba which were caught alive. The concentration of free short-chain acids in blood was about 0.97 meq/l, and that in plasma was low, being combined mainly with plasma protein. Free short-chain acids were composed mostly of acetic acid; iso-valeric, propionic, isobutyric and n-butyric acids were also present in decreasing order. Several esterified short-chain acids were found in plasma protein; n-valeric and n-carpoic acids were detected, in addition to those free short-chain acids observed in blood. The ratio of acetic acid in the esterified acids was very low compared to that in the free acids. In plasma protein, long-chain branched acids were rare in both free and esterified forms. These forms had different compositions. In particular, many branched-chain acids with carbon numbers lower than 13 were recognized in the free acids, but few in the esterified acids, where the composition was similar to that of fish oil. In the long-chain straight acids in plasma protein, the amount of saturated and monoenoic acids with carbon numbers lower than 16 and total saturated acids was greater in free form and total polyenoic acids in esterified form.
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