Abstract
Fourteen day old rats were injected intracerebrally with [1-C14]acetate. 3, 7, 14 and 76 days later, the incorporation of isotope into the fatty acids and aldehydes of the glycerophosphatides of the brain was determined. The aldehyde mixtures of all animals consisted of about 98% palmitic, stearic and oleic aldehydes. The proportion of individual components in the total mixture changed with increasing age; palmitic aldehyde decreased sharply in favor of oleic aldehyde. The level of stearic aldehyde remained constant at about 45%. The specific activities of the fatty acids were higher than those of the aldehydes of equal chain length up to 14 days after the injection. The relationship was then reserved. Up to about the same time, the C16-compounds (fatty acids and aldehydes) showed higher specific activities than the C18-compounds.

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