リン脂質の熱挙動

抄録

The pyrolytic behavior of several phospholipids were studied by thermogravimetry. The samples employed were phosphatidylethanolamines whose acyl chains contained different carbon numbers and degrees of unsaturation, and phosphatidylethanolamine and phosphotidylcholine which were isolated from phospholipids of soybean origin and egg yolk origin. The weight loss of phospholipids in flows of air and nitrogen are ascribed to molecular decomposition which occurred at several steps of reaction. When the phospholipid was composed of unsaturated fatty acids, the weight loss behavior in flow of both atmospheric gasses showed more complicated patterns with an increase in degrees of unsaturation. It might be concluded that their wieght loss was caused by thermal oxidation and polymerization. In the case of phospholipids with different origin, the weight loss behavior in nitrogen flow differed according to polar groups such as ethanolamin or choline which was combined with the phospholipid. On the other hand, the weight loss in air flow differed by fatty acids which constituted the phospholipid.