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气质联用法测定环境空气中有机硫化物 被引量:10
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作者 张凤菊 金玲仁 +2 位作者 李红莉 张文华 朱晨 《环境监测管理与技术》 2014年第3期44-47,共4页
采用 SUMMA罐采集空气样品,在预浓缩系统中经3级冷阱捕集后,用气相色谱-质谱联用技术测定环境空气中7种痕量有机硫化物。对试验条件进行优化,使得甲硫醇、乙硫醇、甲硫醚、二硫化碳、噻吩、乙硫醚和二甲二硫醚等7种有机硫化物在21.4... 采用 SUMMA罐采集空气样品,在预浓缩系统中经3级冷阱捕集后,用气相色谱-质谱联用技术测定环境空气中7种痕量有机硫化物。对试验条件进行优化,使得甲硫醇、乙硫醇、甲硫醚、二硫化碳、噻吩、乙硫醚和二甲二硫醚等7种有机硫化物在21.47μg/m3~336.43μg/m3范围内线性良好。试验表明,7种有机硫化物的方法检出限为0.004μg/m3~0.036μg/m3;标准气体平行测定6次结果的 RSD为2.7%~6.2%,加标回收率为92.2%~97.5%。用该方法测定实际空气样品,并与傅立叶红外光谱法测定的结果进行比对,结果令人满意。 展开更多
关键词 有机硫化物 冷阱预浓缩 气相色谱质谱联用法 环境空气
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Metabonomics and Molecular Biology-based Effects of Sugemule-3 in an Isoproterenol-induced Cardiovascular Disease Rat Model
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作者 WANG Xiye WANG Yu +1 位作者 WEI Chengxi YU Lijun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2018年第4期590-597,共8页
Cardiovascular disease(CVD) is a common and serious disease in the elderly, which has characteristically high prevalence, disability, and mortality rates. However, the etiology of CVD is still not very clear. The tr... Cardiovascular disease(CVD) is a common and serious disease in the elderly, which has characteristically high prevalence, disability, and mortality rates. However, the etiology of CVD is still not very clear. The traditional Mongolian medicine Sugemule-3(SM) is usually used for the treatment of CVD and exhibits a good curative effect. In this study, a sentm metabolite profile analysis was used to identify potential biomarkers associated with isoprote- renol(ISO)-induced CVD and investigate the mechanism of the action of SM. Ultra-perfornlance liquid chromato- graphy coupled with quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS) was used for the metabono- mics analysis. Principal component analysis(PCA) was used to process the acquired data to differentiate the results of the control, CVD, and SM treatment groups. Orthogonal partial least squares discriminant analysis(OPLS-DA) enabled the identification of 21 metabolites as potential biomarkers that were relevant to phospholipid and energy metabolism. The results indicate that SM played a protective role against ISO-induced CVD in rats by regulating phospholipid and energy metabolic pathways. Fttrther, we verified the apoptotic metabolic pathway using molecular biology methods, such as terminal deoxynucleotidyl transferase(TdT) deoxyuridine 5'-triphosphate(dUTP) nick-end labeling(TUNEL) assay and Western blot analysis. Furthermore, this study identified early biomarkers of CVD and elucidated the underlying mechanism of the therapeutic actions of SM, which is worth further to be investigated for development as a clinical therapy. 展开更多
关键词 Sugemule-3 METABONOMICS Molecular biology Ultra-perfbrmance liquid chromatography coupled withmass spectrometry(UPLC-MS) Cardiovascular disease ISOPROTERENOL
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