Abstract
The chemical composition of human colostrum was investigated with 68 samples obtained in Tokyo from the mothers of 3-12 days after parturition.
The average values of constitueuts per 100g (standard deviations) of the colostrum (3-7 days) were as follows; total solids, 12.41 (1.22) g; fat, 2.96 (1.26) g; solids-not-fat, 9.46 (0.45) g; lactose, 5.80 (0.37) g; crude protein, 2.05 (0.48) g; true protein, 1.63 (0.43) g; non-protein-nitorogenous compounds, 0.43 (0.11) g; casein, 0.76 (0.33) g; serum protein, 0.87 (0.49) g; ash, 0.30 (0.035) g; calcium, 23.2 (7.2) mg; phosphorus, 24.2 (4.90) mg; iron, 0.17 (0.02) mg.
Of the milk of transition stage (8-12 days) were as follows; total solids, 12.87 (1.23) g; fat, 3.56 (1.16) g; solids-not-fat, 9.32 (0.67) g; lactose, 6.22 (0.19) g; crude protein, 1.60 (0.23) g; true protein, 1.26 (0.14) g; non-protein-nitorogenous compounds, 0.38 (0.09) g; casein, 0.86 (0.19) g; serum protein, 0.40 (0.15) g; ash, 0.26 (0.026) g; calcium 21.4 (4.3) mg; phosphorus, 20.2 (2.5) mg; iron, 0.14 (0.04) mg.
The effect of post partum days on the chemical composition was statistically analyzed by the way of sequentional classification. The increase in lactose and phosphorus, the decrease in crude protein, true protein, serum protein and ash with the progress of post partum days were observed significant.
The figures of 80% of true protein N and 20% of non-protein N were independent from the progress in post partum days. Casein N percent against total N was, therefore, increased, on the other hand serum protein N was decreased with the progress in days.
Lactose content was higher, while crude protein, ture protein, serum protein, non-protein nitrogenous compounds and ash were lower compared with normal milk.
