においの自己順応における閾下濃度の4-hexanolide添加の影響

概要

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No systematic psychophysical study on the self-adaptation of the mixture of odorants has been reported up to the present. In this study, we examined the effects on the self-adaptation by adding 4-hexanolide in concentration below its odor threshold to the model solutions of the odor-active compounds of tea. When 4-hexanolide was added to the aqueous solutions of (E)-2-hexeny 1 hexanoate or that of (Z)-3-hexenol, the self-adaptations of these two odorants were depressed. The important role of a lactone compound like 4-hexanolide in concentration below its odor threshold in the tea aroma has become apparent at the first time in this study. In addition prolongations of the odor sensations of (E)- 2-hexenyl hexanoate and (Z)-3-hexenol by the effect of 4-hexanolide were indicated. In contrast to these two compounds there was no effect of adding 4-hexanolide on the self-adaptation of (Z)-3-hexenyl hexanoate. The difference in odor quality between (E)-2-hexenyl hexanoate and (Z)-3-hexenyl hexanoate was also revealed by the cross-adaptation method.
日本味と匂学会の論文