飽和トリグリセリドの転移速度 (第1報) : トリステアリン-液相系における転移

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The rates of phase transition of tristearin have been studied by X-ray diffraction. <BR>(1) In solid phase of triglycerides, α-form transformed into β near mp of α, The rates of transition α→β were determined and the activation energy was obtained. (Table 1, Fig.-2) <BR>(2) When tristearin melted with triolein, tricaproin or liquid paraffin, it seemed that tristearin was dispersed in the liquid oil. In this case, it was observed that the rate of the transition α→β of tristearin was faster and the activation energy was smaller than that of the solid. It was also observed that the larger the ratio of the liquid to the solid, the faster the transition rate was. IIowere, it was concluded that the activation energy was independent on the ratio of the liquid. (Fig.-3-5, Table-3) <BR>(3) When the solid phase of tristearin existed in an organic solvent such as alcohol, chloroform etc. time rate of transformation α→β of tristearin was faster in the solvent that has higher soluhility. (Fig.-7) <BR>In conclusion it was believed that the rate of transition α→β of tristearin in equilibrium with its organic solution or oil was dependent on the size of tristearin and the solubility.
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