The essential and toxic element concentrations in buckwheat were analyzed by inductively coupled plasma optical emission spectrometer（ICP-OES）. The concentration data were subjected to common chemometrics analyses, ...The essential and toxic element concentrations in buckwheat were analyzed by inductively coupled plasma optical emission spectrometer（ICP-OES）. The concentration data were subjected to common chemometrics analyses, including correlation analysis（CA）, principal component analysis（PCA） and hierarchical cluster analysis（HCA）, to gain better understanding of the differences among the tested samples. Our results indicated that the essential and toxic element concentrations were not different between Fagopyrum tataricum（L.） Gaertn and F. esculentum Moench. The element concentrations varied among buckwheat samples from different sources. Commercial tartary buckwheat tea contained several essential elements, thus, could be used as the source of essential elements. The detection of toxic heavy metals in commercial tartary buckwheat tea suggested that safety issue of such buckwheat products should be seriously concerned. Our results also revealed that the place of origin and the processing protocol of tartary buckwheat affected the element concentrations of the commercial form. The implications to the quality control and safety evaluation of buckwheat were extensively discussed.展开更多
Channel tropism is investigated and developed through long-term clinical practice.In recent years,the development of channel tropism theory has attracted increasing attention.This study analyzed channel tropism theory...Channel tropism is investigated and developed through long-term clinical practice.In recent years,the development of channel tropism theory has attracted increasing attention.This study analyzed channel tropism theory and the problems associated with it.Results showed that this theory and systems biology have a similar holistic viewpoint.Systems biology could provide novel insights and platform in the study of channel tropism.Some problems in channel tropism theory,including pharmacology and action mechanism,were investigated.展开更多
From the ethanol extract of Selaginella moellendorffii Hieron., a new flavone O-glycoside and three known flavone C-glycosides have been isolated and identified as 5-carboxymethyl-4′-hydroxyflavone-7-O-β-D-glucopyra...From the ethanol extract of Selaginella moellendorffii Hieron., a new flavone O-glycoside and three known flavone C-glycosides have been isolated and identified as 5-carboxymethyl-4′-hydroxyflavone-7-O-β-D-glucopyranoside 1, 6,8-di-C-β-D-glueopyranosylapigenin 2, 6-C-[3-D-glucopyranosyl-8-C-β-D-xylopyranosyl apigenin 3, 6-C-B-D-xylopyranosyl-8-C-β-glucopyranosylapigenin 4, respectively. Their structures were elucidated by spectroscopic methods.展开更多
A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the her...A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the herb of Selaginella labordei Hieron. ex Christ. Their structures were elucidated by spectroscopic methods. ？2009 Ke Li Chert. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
基金the Key Technologies R&D Program of China during the 12th Five-Year Plan period(2012BAI27B07)the National Natural Science Foundation of China (81173653)+2 种基金the Administration of Traditional Chinese Medicine Department of Sichuan Province, China (2010-78)the Research Funds of Southwest University for Nationalities, China (13NLY01)the Earmarked Fund for China Agriculture Research System (CARS-08-D-3)
文摘The essential and toxic element concentrations in buckwheat were analyzed by inductively coupled plasma optical emission spectrometer（ICP-OES）. The concentration data were subjected to common chemometrics analyses, including correlation analysis（CA）, principal component analysis（PCA） and hierarchical cluster analysis（HCA）, to gain better understanding of the differences among the tested samples. Our results indicated that the essential and toxic element concentrations were not different between Fagopyrum tataricum（L.） Gaertn and F. esculentum Moench. The element concentrations varied among buckwheat samples from different sources. Commercial tartary buckwheat tea contained several essential elements, thus, could be used as the source of essential elements. The detection of toxic heavy metals in commercial tartary buckwheat tea suggested that safety issue of such buckwheat products should be seriously concerned. Our results also revealed that the place of origin and the processing protocol of tartary buckwheat affected the element concentrations of the commercial form. The implications to the quality control and safety evaluation of buckwheat were extensively discussed.
基金This study is supported by the National Basic Research Program(Grant No.2009CB522707)the Science Fund for Distinguished Young Scholars of Wuhan City(Grant No.D201050231081)the Project of Hubei Provincial Department of Education(Grant No.Q20101081).
文摘Channel tropism is investigated and developed through long-term clinical practice.In recent years,the development of channel tropism theory has attracted increasing attention.This study analyzed channel tropism theory and the problems associated with it.Results showed that this theory and systems biology have a similar holistic viewpoint.Systems biology could provide novel insights and platform in the study of channel tropism.Some problems in channel tropism theory,including pharmacology and action mechanism,were investigated.
基金supported by the National Natural Science Foundation of China (No.30470193).
文摘From the ethanol extract of Selaginella moellendorffii Hieron., a new flavone O-glycoside and three known flavone C-glycosides have been isolated and identified as 5-carboxymethyl-4′-hydroxyflavone-7-O-β-D-glucopyranoside 1, 6,8-di-C-β-D-glueopyranosylapigenin 2, 6-C-[3-D-glucopyranosyl-8-C-β-D-xylopyranosyl apigenin 3, 6-C-B-D-xylopyranosyl-8-C-β-glucopyranosylapigenin 4, respectively. Their structures were elucidated by spectroscopic methods.
基金supported by the National Natural Science Foundation of China(No.30470193).
文摘A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the herb of Selaginella labordei Hieron. ex Christ. Their structures were elucidated by spectroscopic methods. ？2009 Ke Li Chert. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
