EN
The effect of calcium on the synthesis of vitamin C in chicken tissues was examined. The content of vitamin C was determined in chicken tissue by the Roe-Kuether method and the activity of l-gulono-γ-oxidase active in the terminal phase of vitamin C synthesis by the Chatterjee method. Absorption of vitamin C and calcium from the intestines was determined in vivo by the method of a perfused intestinal loop. A significant increase of vitamin C was observed in the liver (58.4%), jejunal wall (65.85), pectoral muscle (100%). L-gulono-γ-oxidase also increased in all tissues under study. Calcium increased absorption of vitamin C from intestines. Absorption of vitamin C in the jejunum was determined at a concentration of 500 and 1000 mg/l of calcium. Calcium at a concentration of 500 mg/l increased absorption of vitamin C from 2.6 mg/l/cm²/60 min to 3.78 mg/l/cm²/60 min. Absorption of calcium was determined at a concentration of 200 mg/l of vitamin C. Vitamin C decreased absorption of calcium from the jejunum from 3.32 mg/l/cm²/60 min to 1.40 mg/l/cm²/60 min.