کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8948190 1645649 2018 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Liquid chromatographic techniques in betacyanin isomers separation from Gomphrena globosa L. flowers for the determination of their antimicrobial activities
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Liquid chromatographic techniques in betacyanin isomers separation from Gomphrena globosa L. flowers for the determination of their antimicrobial activities
چکیده انگلیسی
High-speed counter-current chromatography (HSCCC) combined with HPLC were established to purify, for the first time, betacyanin isomers from Gomphrena globosa L. flowers. The mixture of tert-butyl methyl ether - butanol - methanol - water TBME-BuOH-MeOH-H2O (1.0% heptafluorobutyric acid HFBA) 2:2:1:5 (v/v/v/v) in reversed phase mode was used for preliminary purification of gomphrenin derivatives. Then, semiprep-HPLC was used to obtained ten pure betacyanins: gomphrenins II and III with their cis-isomers as well as sinapoyl-gomphrenin I and its corresponding diastereomers. This is the first study on separation of naturally coexisting acylated gomphrenin isomers. The isolated compounds showed a broad antimicrobial spectrum (in the range of 0.19-1.5 mg mL−1) by inhibiting the growth of all of food-borne pathogens tested. The antimicrobial activity of acylated betacyanins was higher than that of non-acylated gomphrenin I/isogomphrenin I. Therefore, the acylation with phenolic acids increases the activity of betacyanins against fungi and bacteria, suggesting a synergetic effect of the acylated moieties and the pigment chromophoric system on the activity, which was evaluated for the first time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical and Biomedical Analysis - Volume 161, 30 November 2018, Pages 83-93
نویسندگان
, , , , , ,