硬化ヤシ系油脂の劣化について (第2報)

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書誌事項

タイトル別名
  • Deterioration of Oils and Fats of Hardened Coconut Oil Series. II.
  • コウカ ヤシケイ ユシ ノ レッカ ニ ツイテ 2 ケッショウ セイチョウ ト カスイ ブンカイ ノ カンレンセイ ニ ツイテ ノ カンサツ
  • Correlation between Crystal Growth and Hydrolysis
  • 結晶成長と加水分解の関連性についての観察

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説明

Experiments were carried out with hardened coconut oil to find the correlation between crystal growth and hydrolysis of esterifird lower fatty acid at lower temperature.<BR>1) A.V. showed practically no change, both in hardened and non-hardened oils, when stored in anhydrous state, and there was no difference in the values due to storage temperature.<BR>When the oil was saturated with vapor, the values increased in the order of those stored 15 and 5°C, and the tendency was especially marked in hardened coconut oil stored at 15°C.<BR>2) Methyl ester of hardened coconut oil and those dissolved in ethanol, n-hexane and benzen did not show rise in A.V. values even when stored at a low temperature.<BR>3) The fraction obtained by molecular distillation showed less change, even when stored at 5°C, than the original hardened coconut oil. The fact that A.V. was higher in Fraction 2 than in Fraction 1, containing larger amount of lower acids, indicated that when molecules of a same size were collected, more impacted intermolecular space should be presumably produced. This was borne by the fact that electron microscopic observation showed a smooth surface although there were fine single crystals.

収録刊行物

  • 油化学

    油化学 16 (10), 551-554, 1967

    公益社団法人 日本油化学会

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