Changes of invertase activity in Japanese persimmon fruits during maturation, storage and processing
カキ果実の成熟,貯蔵および加工中のインベルターゼ活性の変化

Shunji HIRAI, Sayaka ROKUHARA, Sumio SHIMIZU
1986 NIPPON SHOKUHIN KOGYO GAKKAISHI  
Changes of invertase activity, sugar contents and astringency in Japanese persimmon fruits (Diospyros kaki Thunb.) during maturation, storage and processing were studied by gas chromatoraphy. Results were as follows; (1) Optimum pH of invertase activity was aroud 5 .5 and optimum temperature was about 30-40℃. (2) Invertase activity per 1g of fruit was 80-230 nano Katal (4.8-13.8U)at 30℃, pH 5.5. (3) Invertase activity was proved to increase during storage and various methods of deastringency,
more » ... at is alcohol (25%) spraying, alcohol powder of (prepared with starch and ethanol) spraying and sun-drying with or without sulfur fumigation.
doi:10.3136/nskkk1962.33.6_369 fatcat:bppuoiuwbbbq5azg7hjb3tu73i