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Development of Pectinase Preparation for the Making of Orange Juice : 2. Clarification Activities of Pectinase Preparations on the Citrus Juices, and the Relationship between Polygalacturonase and Pectinesterase for its Clarifying Activity

Bulletin of the Faculty of Agriculture, Yamaguchi University Volume 18 Page 1055-1062
published_at 1967
Title
柑きつ果汁清澄用ペクチナーゼ剤の開発 : 第2報 柑きつ果汁清澄力とポリガラクチュロナーゼおよびペクチンエステラーゼの関係
Development of Pectinase Preparation for the Making of Orange Juice : 2. Clarification Activities of Pectinase Preparations on the Citrus Juices, and the Relationship between Polygalacturonase and Pectinesterase for its Clarifying Activity
Creators Nomura Danji
Creators Fukui Takayuki
Creators Nakayama Yasushi
Source Identifiers
The clarification of natural juice has been studied using commercial Pectolytic enzymes produced by Coniothyrium diplodiella and Aspergillus niger. Commercial pectolytic enzymes contains polygalacturonase and pectinesterase. These two enzymes could not cause the clarification of citrus juice alone, whereas a mixture of them was capable of clarifying the juice almost completely. The clarifying activity of an enzyme preparation depended on the activities of polygalacturonase, pectinesterase and the ratio of these two enzymes. On the juice of Mandarin orange, the clarifying activity of the enzyme preparation was effectiveness in the ranges of PG=90 Pgu, PE=60 Peu, and the ratio of PG/PE=O.6. The increasing of this value of PG/PE improved the clarification. The clarifying activity of the enzyme preparation on the juice of Natsudaidai was very limited in the range of PG/PE=1.6~3.1, and was also required above the level in the activities of PG=280 Pgu and PE=175 Peu. On this reason, we could be understand that it is very difficult to developing of more effective pectinase preparation for the clarifying of Natsudaidai juice.
Subjects
農学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学農学部
Date Issued 1967
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0513-1715
[NCID]AN00244250
Schools 農学部