The major immunogenic proteins （Ems, E2 and NS3） of classical swine fever virus （CSFV） （Shimen strain） were expressed in E. coli and purified by affinity chromatography. The recombinant antigens were applied to ...The major immunogenic proteins （Ems, E2 and NS3） of classical swine fever virus （CSFV） （Shimen strain） were expressed in E. coli and purified by affinity chromatography. The recombinant antigens were applied to develop multiple enzyme-linked immunosorbent assays （ELISAs） for the detection of specific antibodies in pig sera. Optimum cut-off values were determined by receiver operating characteristic （ROC） analysis after testing 201 sera of vaccinated pigs and 64 negative sera of unvaccinated piglets. The multiple ELISAs were validated with 265 pig sera yielding high sensitivity and specificity in comparison with the virus neutralization results. The results demonstrated that multiple ELISAs can be a valuable tool for the detection of CSFV infection and serological surveys in CSFV-free countries or for the evaluation of the antibody responses in pigs induced by a live attenuated C-strain vaccination展开更多
An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation withou...An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation without any photocatalyst at room temperature in good chemical yields.展开更多
文摘研制与评价一种镁离子增强的PETIA法检测血清胱抑素C试剂。在含有聚乙二醇6000和镁离子的pH 7.6的Tris-HC1缓冲液中，胱抑素C与包被有胱抑素C抗体的纳米胶乳微球反应并形成一定浊度，该浊度与样品中胱抑素C浓度成正比。该法线性范围为0~15.00 mg/L，批内和批间精密度（ CV）分别为0.54%~1.81%和0.72%~2.23%，平均回收率为99.9%，该法（ y）与参考方法（x）具有良好的相关性，线性回归方程和相关系数分别为 y =0.9984 x ＋0.026，r =0.9984。所述的试剂测定血清胱抑素C，具有操作简便、线性范围宽、灵敏度高的优点，具有推广应用价值。
基金the National Natural Science Foundation of China(30771597)the Key Project of Science and Technology of Wuhan(200720422141)
文摘The major immunogenic proteins （Ems, E2 and NS3） of classical swine fever virus （CSFV） （Shimen strain） were expressed in E. coli and purified by affinity chromatography. The recombinant antigens were applied to develop multiple enzyme-linked immunosorbent assays （ELISAs） for the detection of specific antibodies in pig sera. Optimum cut-off values were determined by receiver operating characteristic （ROC） analysis after testing 201 sera of vaccinated pigs and 64 negative sera of unvaccinated piglets. The multiple ELISAs were validated with 265 pig sera yielding high sensitivity and specificity in comparison with the virus neutralization results. The results demonstrated that multiple ELISAs can be a valuable tool for the detection of CSFV infection and serological surveys in CSFV-free countries or for the evaluation of the antibody responses in pigs induced by a live attenuated C-strain vaccination
基金supported by the National Natural Science Foundation of China(2147208481421091)+2 种基金the Qing Lan Project of Jiangsu Province and State Key Laboratory of Bioorganic & Natural Products ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences
文摘An efficient and practical method is developed for the trifluoromethylation of enamides using Umemoto's reagent as the trifluoromethylating reagent. These reactions proceeded under visible light irradiation without any photocatalyst at room temperature in good chemical yields.
