A Simplified Technique for the Determination of Gross Protein Value

IN A previous paper by the author (1960), gross protein value was described by expressing the growth per gram of test protein as a percentage of the growth per gram of casein, both measurements being made above the growth achieved per gram of protein consumed by the control birds. The equation used for calculating the gross protein value of protein concentrates was: T-CS-C×100 Where T, S and C are the gains per gram of test protein, casein and protein consumed by the control birds, respectively. The techniques used for confirming the equation were those reported by Carpenter et al. (1955) where each experiment included a number of test protein concentrates plus a casein and a control diet. The new technique was carried out in the same manner but in the hope of neglecting both the control and the casein diets as the gain per gram of casein and that of…