The experiments on rats receiving a complete intravenous nutrition (group 1) during 15 days showed that the concentration of natrium, magnesium and iron was increased in the liver and decreased in the spleen as compared to that in controls given normal feeding (group 2). The content of zink and copper (mg%) was significantly lowered in both the organs of rats in group 1. The growth of the liver and spleen mass during parenteral feeding led to a significant rise in the content of natrium, potassium, magnesium, iron, zink and manganese in the whole liver tissue of group 1 rats, while the content of calcium and copper was similar in both groups of animals. The content of natrium, potassium, magnesium, iron and zink in the whole spleen tissue was significantly higher in group 1 rats, while the content of calcium, copper and manganese was similar in both groups of rats. A correlation was revealed between the content of iron and copper in the liver tissue (r = +0.87) and the levels of natrium and magnesium it the spleen tissue (r = +0.78) of group 1 rats. In group 2 rats a correlation was recorded between the content of calcium and manganese in the liver tissue an the levels of natrium and calcium in the spleen (r = +0.85 and +0.86, respectively).
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