The Syntheses and Interconversions of Polyunsaturated Fatty Acids by the Laying Hen ,

Abstract
White Leghorn hens in full egg production were placed on a sucrose, egg albumen basal ration containing no polyunsaturated acids or with 2% bayberry tallow, linoleate, tung oil, or cod liver oil added. In two experiments a hen on the fat-free ration was given pure trilinolenin and linolenic acid during 19 and 27 weeks, respectively. Polyethenoid fatty acids were determined in the neutral fat and phospholipids of subsequent eggs. It was found: