Deficiencies in Over-Heated Soybean Oil Meal

THE adverse effect of heat upon the nutritive value of cereal proteins was demonstrated by Morgan and King (1926). Since the publication of their paper numerous other reports dealing with the effect of heat on the nutritive value of various proteins have appeared. Reference to much of the literature on this subject will be found in the papers by Greaves, Morgan and Loveen (1938) and Block et al. (1946). The adverse effect of excessive amounts of heat on soybean proteins has been reported by Mussehl (1942), Bird and Burkhardt (1943), and Evans and McGinnis (1946). In the studies reported herein an attempt has been made to determine vitamin and amino acid deficiencies that exist in over-heated soybean oil meal. EXPERIMENTAL Single Comb White Leghorn chicks were used in these experiments. In order to have chicks of comparable growing capacity in each group the following method of selecting chicks was adopted. . . .