[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass...[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass spectrometry and analyzed by single index and comprehensive index.[Results]The seven heavy metal elements showed good linearity in their respective concentration ranges.The recoveries of the samples were 84.5%-109.5%,and the RSD values were 2.30%-5.10%.Comparing the measured results of heavy metal elements with the limit values stipulated in the 2020 edition of the Chinese Pharmacopoeia and other standards,the Cr element in 19 batches of samples exceeded the standard,and the Zn element in 7 batches of samples exceeded the standard.The exceeding rates were 100.0%and 36.8%,respectively;the content of other heavy metal elements did not exceed the standard.The order of individual index from large to small was Cr,Zn,Cd,Hg,Cu,As,and Pb,and the average comprehensive pollution level was mild pollution and above.[Conclusions]L.christinae was mainly polluted by Cr,followed by Zn;this study can provide basic data for drafting of the limit standard for heavy metal elements in L.christinae.展开更多
The global coronavirus disease 2019(COVID-19)has become one of the biggest threats to the world since 2019.The respiratory and gastrointestinal tracts are the main targets for severe acute respiratory syndrome coronav...The global coronavirus disease 2019(COVID-19)has become one of the biggest threats to the world since 2019.The respiratory and gastrointestinal tracts are the main targets for severe acute respiratory syndrome coronavirus 2 infection for they highly express angiotensin-converting enzyme-2 and transmembrane protease serine 2.In patients suffering from COVID-19,gastrointestinal symptoms have ranged from 12%to 61%.Anorexia,nausea and/or vomiting,diarrhea,and abdominal pain are considered to be the main gastrointestinal symptoms of COVID-19.It has been reported that the direct damage of intestinal mucosal epithelial cells,malnutrition,and intestinal flora disorders are involved in COVID-19.However,the underlying mechanisms remain unclear.Thus,in this study,we reviewed and discussed the correlated mechanisms that cause gastrointestinal symptoms in order to help to develop the treatment strategy and build an appropriate guideline for medical workers.展开更多
基金Supported by Risk Monitoring Task Project of Chongqing Drug Administration in 2020。
文摘[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass spectrometry and analyzed by single index and comprehensive index.[Results]The seven heavy metal elements showed good linearity in their respective concentration ranges.The recoveries of the samples were 84.5%-109.5%,and the RSD values were 2.30%-5.10%.Comparing the measured results of heavy metal elements with the limit values stipulated in the 2020 edition of the Chinese Pharmacopoeia and other standards,the Cr element in 19 batches of samples exceeded the standard,and the Zn element in 7 batches of samples exceeded the standard.The exceeding rates were 100.0%and 36.8%,respectively;the content of other heavy metal elements did not exceed the standard.The order of individual index from large to small was Cr,Zn,Cd,Hg,Cu,As,and Pb,and the average comprehensive pollution level was mild pollution and above.[Conclusions]L.christinae was mainly polluted by Cr,followed by Zn;this study can provide basic data for drafting of the limit standard for heavy metal elements in L.christinae.
基金the Commission,No.KJZD-K202002701General Project of Chongqing Natural Science Foundation,No.cstc2019jcyj msxmX0299+3 种基金Key Project of Chongqing Three Gorges Medical College,No.XJ2021000101Chongqing Natural Drug Anti-Tumor Innovation Research Group,No.CXQT20030Special Fund for Key Laboratory of Development and Utilization of Genuine Medicinal Materials in Three Gorges Reservoir Area,No.Sys20210002the Open Project in 2022 of Chongqing Key Laboratory for the Development and Utilization of Authentic Medicinal Materials in the Three Gorges Reservoir Area,No.KFKT2022004.
文摘The global coronavirus disease 2019(COVID-19)has become one of the biggest threats to the world since 2019.The respiratory and gastrointestinal tracts are the main targets for severe acute respiratory syndrome coronavirus 2 infection for they highly express angiotensin-converting enzyme-2 and transmembrane protease serine 2.In patients suffering from COVID-19,gastrointestinal symptoms have ranged from 12%to 61%.Anorexia,nausea and/or vomiting,diarrhea,and abdominal pain are considered to be the main gastrointestinal symptoms of COVID-19.It has been reported that the direct damage of intestinal mucosal epithelial cells,malnutrition,and intestinal flora disorders are involved in COVID-19.However,the underlying mechanisms remain unclear.Thus,in this study,we reviewed and discussed the correlated mechanisms that cause gastrointestinal symptoms in order to help to develop the treatment strategy and build an appropriate guideline for medical workers.
