QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Menge, H. Articles by Denton, C. A. Search for Related Content PubMed PubMed Citation Articles by Menge, H. Articles by Denton, C. A.

A Chick-Growth Factor in Egg Yolk

Animal Husbandry Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland

Fresh or dried yolk was shown to contain an unidentified chick growth factor (s) not identical with the fish solubles factor. Preliminary fractionation procedures have shown that the active principle is fat soluble since it can be extracted from dried yolk by the common fat solvents. The yolk factor is not identical with oleic acid, linoleic acid, or lecithin. The non-phospholipid and the non-saponifiable portions of yolk extracts contain the growth factor. The yolk factor is destroyed by hot but not by cold saponification. Adjustments in the calorie: protein ratio of the diet and omission of alfalfa leaf meal (source of saponins) from the ration did not affect the growth response to yolk.