Document Type

Journal Article

Department/Unit

School of Chinese Medicine

Title

Authentication of Chinese Materia Medica decoction dregs. part II: Comparison before and after decoction of four Chinese Materia Medica that mainly comprise storage tissue

Language

English

Abstract

Authentication of Chinese Materia Medica (CMM) decoction dregs is important for ensuring the efficacy and safety of CMM when they are used in decoction. If someone got worse or poisoned after taking a decoction while the formula is appropriate, the authentication of CMM dregs is the effective method to explore the reasons. Therefore, a systematic study on the authentication of CMM dregs was carried out. In this study, two pairs of easily confused CMM dregs, Fenge (Puerariae Thomsonii Radix) and Shanyao (Dioscoreae Rhizoma), Dihuang (Rehmanniae Radix) and Huangjing (Polygonati Rhizoma), which mostly comprise storage tissues, were investigated by comparing the morphological and microscopic characteristics. Fenge and Shanyao contain abundant starch granules. After decoction their dregs were hard, nonstarchy and horn-like. Fully gelatinized starch granules were found in the powder of Fenge dregs while incompletely gelatinized starch granules were occasionally found in the Shanyao dregs. In contrast, Dihuang and Huangjing contain water-soluble sugars. After decoction, their dregs were hard and brittle. Their parenchymatous cells were shrunken and unknown crystals were found under microscope. Hence, the morphological and microscopic characteristics of CMM before and after decoction were different, and different changes in the CMM dregs can be illustrated by the different nature of their ergastic substance. These differences could be used to authenticate CMM dregs. © 2011 Wiley Periodicals, Inc.

Keywords

Authentication, Chinese materia medica dregs, Dioscoreae rhizoma, Polygonati rhizoma, Puerariae thomsonii radix, Rehmanniae radix

Publication Date

2012

Source Publication Title

Microscopy Research and Technique

Volume

75

Issue

2

Start Page

164

End Page

175

Publisher

Wiley

DOI

10.1002/jemt.21039

Link to Publisher's Edition

http://dx.doi.org/10.1002/jemt.21039

ISSN (print)

1059910X

ISSN (electronic)

10970029

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