Human Milk Studies

Radiation Sterilization of Foods, Biological Value of Gamma Irradiated Corn Protein and Wheat Gluten

“…However, the digestibility of the 9.3 million rad irradiated corn protein was significantly lower (p < 0.01) than the nonprocessed corn-the difference being 4.8 ± 0.71-or the heat-cooked cornthe difference being 6.1 ± 0.91-or the 2.8 million rad irradiated corn-the difference being 6.6 ± 0.98. Nitrogen metabolism values of 91% for the digestibility and of 48% for the biological value for the Illinois high protein corn are in good agreement with the reported values (5).…”

“…The corn and wheat gluten samples were analyzed microbiologically for lysine using L. mesenteroides-P-60 (7) after hydrolysis with 2.5.Y hydrochloric acid at 15 pounds pressure for 6 hours. The corn samples were also analyzed microbiologically for tryptophan (5) after hydrolysis with 6.Y barium hydroxide; Streptococcus fecalis R. was the organism employed; and light transmittance was read at 650 µ in a Coleman spectrophotometer. The biological value method of Mitchell (6, 7) with certain modifications was used to measure the nutritive value of the corn protein and the wheat gluten.…”

Food

“…Improved procedures have been elaborated for the microbiological assay of cystine with L. mesenteroides P-60 (25) and tryptophan with Streptococcus faecalis (117). A procedure for the microbiological assay of l-, n-, and DL-methionine has been suggested (24).…”