白米飼育シロネズミに対するリジン、スレオニン添加の効果

抄録

The nutritional effect of the addition of L-lysine and DL-threonine to polished rice was examined in rats fed on polished rice as the single protein source. Examinations were made on the increase of body weight (growth), nitrogen balance, activity of xanthine oxidase in the liver, total protein in the serum, and serum protein fraction. The growth of rats fed on polished rice added with both lysine and threonine was good but liver xanthine oxidase activity was extremely low like the group fed on diet without addition of the amino acids. No significant difference was found in total protein in the serum and serum protein fraction, as well as in nitrogen balance. These observations indicate that the addition of these amino acids alone to polished rice does not give a complete protein nutrition. It was also considered that evaluation of the nutritional value of proteins cannot be made sufficiently by one method but requires examinations by various methods.