生薬の規格設定に関する研究 (第2報)
生薬の生産条件と成分について その1. オウバクの生産条件とベルベリンの含量について
1953 年 73 巻 2 号 p. 194-195
詳細
1953 年 73 巻 2 号 p. 194-195
The content of berberine in the barks of trunk, branches, and twigs from one tree, as a condition for collection, was determined with phellodendron obtained from Phellodendron japonicum. The content in these three parts was found to decrease in that order, approximately in proportion to the diameter of the particular portion examined. The relationship between the time of collection and berberine content was found to be independent of each other, the content being the maximum in July at 3.09%, that in June being 2.68%, in August, 2.88%, and an average of 2.28-2.44% in other months. It follows, therefore, that collection of barks from large trees during the summer would furnish materials of excellent quality.
