초생추에 있어서 Chromium 의 독성과 Copper 및 Silver 와의 상호작용 = The Toxicity of Chromium and its Interaction with Copper and Silver in the Chicks

다국어 초록 (Multilingual Abstract)

In order to study the toxicity of chromium and its interaction with other elements, three experiments were conducted with 720 broiler type chicks and 480 egg type chicks for a period of 16 weeks The results obtained are as follows. 1. Chicks showed no adverse effect in growth rate and mortality from 200 ppm of hexavalent chromium, but exhibited growth depression and mortality from 400 ppm and 600 ppm. 2. Chicks showed no adverse effect in growth rate and mortality from 500ppm of trivalent chromium, but exhibited growth depression from 1500ppm, 2500 ppm and 4000ppm. But chicks didn`t show any mortality from 1500ppm, 2500 ppm and 4000 ppm. 3. There was no antagonistic interaction between chromium and silver. Silver exaggerated the toxicity of hexavalent chromium. 4. The growth depression with trivalent chromium was reduced by adding copper. 5. As higher levels of hexavalent chromium were administered, (in increasing amounts, 200 ppm, 400 ppm. 600 ppm) the accumulation of chromium in the internal organs was higher. Adding silver did not influence the accumlatation of chromium in the internal organs. 6. As higher level, of trivalent chromium were administered, (in increasing amounts, 500 ppm, 1500 ppm, 2500 ppm, 4000 ppm) the accumulation of chromium in the internal organs was higher. Adding copper showed a tendency of reducing the accumulation of chromium in the internal organs, but showing insignificant difference.