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Your search keyword '"Li, Yazhen"' showing total 13 results
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13 results on '"Li, Yazhen"'

10. Ideal glycated hemoglobin cut‐off points for screening diabetes and prediabetes in a Chinese population

Author

Liu, Yujia, primary, Xiao, Xianchao, additional, Sun, Chenglin, additional, Tian, Suyan, additional, Sun, Zhonghua, additional, Gao, Ying, additional, Li, Yazhen, additional, Cheng, Jie, additional, Lv, You, additional, Li, Mei, additional, Li, Zhuo, additional, Zhang, Yumin, additional, Wang, Gang, additional, Liu, Yang, additional, Gao, Yuan, additional, Zhu, Liwen, additional, Liu, Yan, additional, and Wang, Guixia, additional

Published
2016
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12. Evaluation of different obesity indices as predictors of type 2 diabetes mellitus in a Chinese population评价不同肥胖指数在中国人群中预测2型糖尿病的价值

Author

Xiao, Xianchao, primary, Liu, Yujia, additional, Sun, Chenglin, additional, Gang, Xiaokun, additional, Cheng, Jie, additional, Tian, Suyan, additional, Gao, Ying, additional, Lv, You, additional, Sun, Zhonghua, additional, Li, Yazhen, additional, He, Ping, additional, Liu, Yang, additional, Wang, Gang, additional, Gao, Yuan, additional, Zhu, Liwen, additional, Liu, Yan, additional, and Wang, Guixia, additional

Published
2014
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13. Qualitative and quantitative analysis of phenolic acid glycosides in Ginkgo biloba L. leaf, G. biloba leaf extract and its injection.

Author

Li Y, Wang R, Lin Y, Han B, Wang B, and Wang S

Subjects
Chromatography, High Pressure Liquid methods, Limit of Detection, Linear Models, Mass Spectrometry methods, Plant Extracts chemistry, Reproducibility of Results, Ginkgo biloba chemistry, Glycosides analysis, Hydroxybenzoates analysis, Plant Leaves chemistry
Abstract

Ginkgo biloba L. leaf (GBL) is one of the most commonly used medicinal plants in the world. Phenolic acids with biological activities have a relatively high content in G. biloba leaf extracts (GBE); therefore they are of great significance for the quality control of GBL, GBE and its preparations. However, there have been few studies focused on their analysis. In this work, 12 phenolic acids, including 11 phenolic acid glycosides, were identified by liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (LC-Q-TOF/MS). Then, a method combining enzymolysis with HPLC was established for quantification of phenolic acid glycosides. It was found that the aglycones of phenolic acid glycosides mainly comprised five phenolic acids: 2,4,6-trihydroxybenzoic acid, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid and p-coumaric acid. The quantitative method was validated, and the correlation coefficient (0.9993-0.9999), recovery (≥88.4%), repeatability (≤0.8%), and inter-day precision (≤5.5%) were satisfactory. Finally, the contents of glycosides of five phenolic acids in GBL, GBE and GBE injection from different sources were determined by the developed method. The method was accurate, repeatable and practicable, which could be helpful for the quantification of phenolic acid glycosides in other products containing GBL or GBE., (© 2020 John Wiley & Sons, Ltd.)

Published
2020
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