目的验证人血清中福氏2a及宋内志贺菌O-特异性多糖(分别简称福氏2a多糖及宋内多糖)抗体IgG含量的ELISA定量检测方法,并用于福氏宋内痢疾双价疫苗免疫前后人血清样本的检测。方法将参考血清及质控血清按一定比例混合,制备成10份不同浓度...目的验证人血清中福氏2a及宋内志贺菌O-特异性多糖(分别简称福氏2a多糖及宋内多糖)抗体IgG含量的ELISA定量检测方法,并用于福氏宋内痢疾双价疫苗免疫前后人血清样本的检测。方法将参考血清及质控血清按一定比例混合,制备成10份不同浓度的血清样本(编号为S1~S10),采用企业提供的间接ELISA定量检测方法检测样本,连续测定6 d,计算多糖抗体IgG回收率和变异系数(coefficient of variation,CV),并以回收率CV低于20%的相应参考血清含量作为定量限(limit of quantitation,LOQ)。采用相同检测方法连续6 d测定血清样本S10及质控血清,每天重复检测3次,计算CV;采用参考血清进行多糖竞争抑制ELISA试验,计算血清对多糖的抑制率。采用企业提供的方法检测参考血清,确定线性范围,获得曲线方程,计算相关系数(R^(2))。采用验证的方法检测1842份福氏宋内痢疾双价疫苗免疫前后的人血清样本。结果10份血清样本中福氏2a和宋内多糖抗体IgG回收率分别为73.21%~222.68%和83.67%~123.56%;试验间及试验内精密性CV均<30%;参考血清对100μg/mL福氏2a和宋内多糖的抑制率分别为85.95%和88.42%;福氏2a和宋内多糖抗体IgG检测的线性范围分别为0.05~0.125和0.025~0.125 EU/mL,R^(2)均≥0.99,LOQ分别为0.050和0.025 EU/mL。福氏宋内痢疾双价疫苗免疫后血清IgG含量大幅高于免疫前。结论企业提供的ELISA定量检测方法具有良好的准确性、精密性及特异性,可用于痢疾疫苗免疫血清的检测。展开更多
A simple model for the direct ionization and transfer ionization probabilities in A^2＋＋He collisions in a wide projectile energy range is proposed based on the Bohr-Lindhard model and the classical statistical model...A simple model for the direct ionization and transfer ionization probabilities in A^2＋＋He collisions in a wide projectile energy range is proposed based on the Bohr-Lindhard model and the classical statistical model. The calculated cross sections are in satisfactory agreement with the experimental data available.展开更多
This paper reports that the ratios of double to single electron loss cross-section （R） of O^2＋ in collision with Ar and He at the velocity of 1 -4 vo（vo is the Bohr velocity） have been obtained by the coincidence...This paper reports that the ratios of double to single electron loss cross-section （R） of O^2＋ in collision with Ar and He at the velocity of 1 -4 vo（vo is the Bohr velocity） have been obtained by the coincidence technique. The trend of R - V in the experiment indicates that the effective charge varies with injected velocity. The effective charge can be obtained by the n-body classical trajectory Monte Carlo method, which is interpreted by the molecular Coulomb over barrier model.展开更多
Target ionization accompanied with projectile electron loss is investigated for 0.2-7 MeV C^q＋ （q = 1 - 4） with He and 0.25-5 MeV O^q＋ （q = 1 - 4） with He collisions. For projectile single-electron loss channel,...Target ionization accompanied with projectile electron loss is investigated for 0.2-7 MeV C^q＋ （q = 1 - 4） with He and 0.25-5 MeV O^q＋ （q = 1 - 4） with He collisions. For projectile single-electron loss channel, the He double-to-single ionization ratio R is nearly independent of projectile charge state but dependent on the nuclear charge of projectile Zp. The results are analysed with atomic structure qualitatively. So far there have not existed the experimental data comparable with our results, to our knowledge. The ratio R is interpreted in terms of the two-step mechanism. This analysis agrees well with similar experiments in the literature.展开更多
文摘目的验证人血清中福氏2a及宋内志贺菌O-特异性多糖(分别简称福氏2a多糖及宋内多糖)抗体IgG含量的ELISA定量检测方法,并用于福氏宋内痢疾双价疫苗免疫前后人血清样本的检测。方法将参考血清及质控血清按一定比例混合,制备成10份不同浓度的血清样本(编号为S1~S10),采用企业提供的间接ELISA定量检测方法检测样本,连续测定6 d,计算多糖抗体IgG回收率和变异系数(coefficient of variation,CV),并以回收率CV低于20%的相应参考血清含量作为定量限(limit of quantitation,LOQ)。采用相同检测方法连续6 d测定血清样本S10及质控血清,每天重复检测3次,计算CV;采用参考血清进行多糖竞争抑制ELISA试验,计算血清对多糖的抑制率。采用企业提供的方法检测参考血清,确定线性范围,获得曲线方程,计算相关系数(R^(2))。采用验证的方法检测1842份福氏宋内痢疾双价疫苗免疫前后的人血清样本。结果10份血清样本中福氏2a和宋内多糖抗体IgG回收率分别为73.21%~222.68%和83.67%~123.56%;试验间及试验内精密性CV均<30%;参考血清对100μg/mL福氏2a和宋内多糖的抑制率分别为85.95%和88.42%;福氏2a和宋内多糖抗体IgG检测的线性范围分别为0.05~0.125和0.025~0.125 EU/mL,R^(2)均≥0.99,LOQ分别为0.050和0.025 EU/mL。福氏宋内痢疾双价疫苗免疫后血清IgG含量大幅高于免疫前。结论企业提供的ELISA定量检测方法具有良好的准确性、精密性及特异性,可用于痢疾疫苗免疫血清的检测。
基金Supported by the National Natural Science Foundation of China with Grant No 10704030.
文摘A simple model for the direct ionization and transfer ionization probabilities in A^2＋＋He collisions in a wide projectile energy range is proposed based on the Bohr-Lindhard model and the classical statistical model. The calculated cross sections are in satisfactory agreement with the experimental data available.
基金supported by the Special Foundation for State Major Basic Research Program of China (Grant No 2002CCA00900)
文摘This paper reports that the ratios of double to single electron loss cross-section （R） of O^2＋ in collision with Ar and He at the velocity of 1 -4 vo（vo is the Bohr velocity） have been obtained by the coincidence technique. The trend of R - V in the experiment indicates that the effective charge varies with injected velocity. The effective charge can be obtained by the n-body classical trajectory Monte Carlo method, which is interpreted by the molecular Coulomb over barrier model.
文摘Target ionization accompanied with projectile electron loss is investigated for 0.2-7 MeV C^q＋ （q = 1 - 4） with He and 0.25-5 MeV O^q＋ （q = 1 - 4） with He collisions. For projectile single-electron loss channel, the He double-to-single ionization ratio R is nearly independent of projectile charge state but dependent on the nuclear charge of projectile Zp. The results are analysed with atomic structure qualitatively. So far there have not existed the experimental data comparable with our results, to our knowledge. The ratio R is interpreted in terms of the two-step mechanism. This analysis agrees well with similar experiments in the literature.
