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  • Title: [Study on the relationship between provenance, leaf type and quality in Magnolia officinalis].
    Author: Si J, Pan X, Tong Z, Zeng Y.
    Journal: Zhong Yao Cai; 1998 Nov; 21(11):541-3. PubMed ID: 12569815.
    Abstract:
    An analysis of effective ingredients in 20 to 29 year old Magnolia officinalis of three different leaf types coming from various sources shows that the content of phenols differ extremely significantly in various leaf types which are a key to determination of quality of Magnolia officinalis also varies significantly among different sources which only have a significant effect on the content of magnolol. Varieties and types cultivated in different places are responsible for the variation in content of magnolol. The conclusions obtained from this study coincide with the traditional insight into quality of Magnolia officinalis.
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