Abstract
Soybean oil was heated at 180°C for 35 and 50 hours. Fresh soybean oil and thermally oxidized oils were fed to rats in a diet containing 15% of oil.The contents of the lipids, tocopherol and protein and amino acids composition in liver, blood and testicle were determined.The results indicated that the rats fed with thermally oxidized oil showed growth depression and ruffled hair as reported in previous papers. The weights and the lipids content in liver of rats fed with thermally oxidized oils were higher than those of rats fed fresh oil.On the contrary, the decrease of weight and of lipids content in testicle was observed.The decrease of protein content was observed in the liver, blood and testicle of rats fed thermally oxidized oils. A significant difference in the liver amino acid composition was observed between rats fed with fresh oil and thermally oxidized oils. Namely, tyrosine, histidine, iso-leucine, serine, cystine, proline and lysine etc. were less detected in those fed with thermally oxidized oils.
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