目的测定五氯硝基苯(PCNB)在人参Panac ginseng C. A. Mey.不同加工方式下的加工因子,以应用于人参膳食风险评估。方法分别考察水煎煮、水浸泡、75%乙醇提取3种加工方式PCNB的转移率,采用硫酸磺化法进行前处理,GC-ECD法测定10批人参药材...目的测定五氯硝基苯(PCNB)在人参Panac ginseng C. A. Mey.不同加工方式下的加工因子,以应用于人参膳食风险评估。方法分别考察水煎煮、水浸泡、75%乙醇提取3种加工方式PCNB的转移率,采用硫酸磺化法进行前处理,GC-ECD法测定10批人参药材、1批药液及加工后药渣中PCNB的残留水平。结果 10批人参药材中PCNB的超标率为50%,PCNB最高残留量为14. 0 mg/kg。测得水煎煮、水浸泡、75%乙醇提取3种方式的加工因子分别为0. 002、0. 04、0. 98。结论该方法准确稳定,重复性好,可用于人参药材和含人参中成药的质量控制。展开更多
Objective To contrast and analyze the difference of metabolites of intestinal flora between patients with type 2diabetes and normal blood glucose human in Xinjiang Uygur and Kazak.Methods Uygur fecal samples and Kazak...Objective To contrast and analyze the difference of metabolites of intestinal flora between patients with type 2diabetes and normal blood glucose human in Xinjiang Uygur and Kazak.Methods Uygur fecal samples and Kazak fecal samples were collected,and short-chain fatty acids(SCFA)were extracted by water from feces,then the content of SCFA in fecal samples was analyzed by gas-chromatography mass-spectrometry(GC-MS).Results Both Uygurs and Kazaks,in their feces,the content of SCFA in the feces showed significantly decreased in patients with type 2diabetes,and a significant negative linear correlation was shown between the fasting plasma glucose and the concentration of SCFA in the fecal samples.But,there was no statistical differences between uygurs and kazaks,in not only normal blood glucose group,but also type 2 diabetes group.Conclusion The feces of patients with type 2diabetes has an decreased concentration of SCFA.Between Uygurs and Kazaks,the metabolic changes of intestinal flora was similar in patients with type 2diabetes.展开更多
基金National natural science foundation project(NO.30760288)
文摘Objective To contrast and analyze the difference of metabolites of intestinal flora between patients with type 2diabetes and normal blood glucose human in Xinjiang Uygur and Kazak.Methods Uygur fecal samples and Kazak fecal samples were collected,and short-chain fatty acids(SCFA)were extracted by water from feces,then the content of SCFA in fecal samples was analyzed by gas-chromatography mass-spectrometry(GC-MS).Results Both Uygurs and Kazaks,in their feces,the content of SCFA in the feces showed significantly decreased in patients with type 2diabetes,and a significant negative linear correlation was shown between the fasting plasma glucose and the concentration of SCFA in the fecal samples.But,there was no statistical differences between uygurs and kazaks,in not only normal blood glucose group,but also type 2 diabetes group.Conclusion The feces of patients with type 2diabetes has an decreased concentration of SCFA.Between Uygurs and Kazaks,the metabolic changes of intestinal flora was similar in patients with type 2diabetes.