Cycloaddition of carbon dioxide and propylene oxide to propylene carbonate catalyzed by tetra-tert-butyl metal phthalocyanine in the presence of tributylamine (TBA) shows higher yield than catalyzed by unsubstituted m...Cycloaddition of carbon dioxide and propylene oxide to propylene carbonate catalyzed by tetra-tert-butyl metal phthalocyanine in the presence of tributylamine (TBA) shows higher yield than catalyzed by unsubstituted metal phthalocyanine. Comparing different catalysts of diverse metals, (t-Bu)4PcMg is more active than (t-Bu)4PcFe. But (t-Bu)4PcCo and (t-Bu)4PcNi only have low catalytic activities towards the reaction. Moreover, the yield will increase as the temperature increases.展开更多
The catalytic properties of a series of cobalt complexes containing bidenated nitrogen ligand for displacement reaction of trialkylaluminum with ethylene is reported. Effect of different reaction time, temperature an...The catalytic properties of a series of cobalt complexes containing bidenated nitrogen ligand for displacement reaction of trialkylaluminum with ethylene is reported. Effect of different reaction time, temperature and cobalt complexes containing different ligand on catalyst performance has been investigated.展开更多
A kinetic study of two ruthenium carbene catalysts, （PCy3）2Cl2Ru=CHPh 1 （Grubbs catalyst） and a new catalyst [1,3-bis（2,6-dimethylphenyl）4,5-dihydroimidazol-2-ylidene]（PPh3） （Cl）2Ru-CHPh 3, were conducted in...A kinetic study of two ruthenium carbene catalysts, （PCy3）2Cl2Ru=CHPh 1 （Grubbs catalyst） and a new catalyst [1,3-bis（2,6-dimethylphenyl）4,5-dihydroimidazol-2-ylidene]（PPh3） （Cl）2Ru-CHPh 3, were conducted in metathesis of 1-hexene. The kinetic behavior of these catalysts at 40, 50, 60 and 70℃ was compared. Complex 3 has the more active catalytic effect at temperatures 40-70℃.展开更多
目的考察国药集团兰州生物制药有限公司人血白蛋白与其内包装材料的相容性。方法采用4种提取溶剂对1批内包装材料(中硼硅玻璃模制注射剂瓶和注射液用卤化丁基橡胶塞)进行提取试验,对内包装潜在的浸出物进行毒理学评估。通过模拟加速试验...目的考察国药集团兰州生物制药有限公司人血白蛋白与其内包装材料的相容性。方法采用4种提取溶剂对1批内包装材料(中硼硅玻璃模制注射剂瓶和注射液用卤化丁基橡胶塞)进行提取试验,对内包装潜在的浸出物进行毒理学评估。通过模拟加速试验,对样品中的元素进行趋势分析以及玻璃瓶内表面观察;并测定长期稳定性试验过程药物常规检查项目。结果内包装材料浸出元素检出结果均≤50%的限值,有机物安全阈值(margin of safety,MOS)均>1.0,表明浸出元素及有机物在当前的暴露量下均不会对使用者有安全风险。模拟加速试验结果表明药品在长期稳定性条件放置一段时间后不会有脱片风险,长期稳定性试验药物常规检查项目均符合药典要求。结论内包材对药品质量无明显影响,总体相容性良好,可用于人血白蛋白的包装。展开更多
文摘Cycloaddition of carbon dioxide and propylene oxide to propylene carbonate catalyzed by tetra-tert-butyl metal phthalocyanine in the presence of tributylamine (TBA) shows higher yield than catalyzed by unsubstituted metal phthalocyanine. Comparing different catalysts of diverse metals, (t-Bu)4PcMg is more active than (t-Bu)4PcFe. But (t-Bu)4PcCo and (t-Bu)4PcNi only have low catalytic activities towards the reaction. Moreover, the yield will increase as the temperature increases.
文摘The catalytic properties of a series of cobalt complexes containing bidenated nitrogen ligand for displacement reaction of trialkylaluminum with ethylene is reported. Effect of different reaction time, temperature and cobalt complexes containing different ligand on catalyst performance has been investigated.
文摘A kinetic study of two ruthenium carbene catalysts, （PCy3）2Cl2Ru=CHPh 1 （Grubbs catalyst） and a new catalyst [1,3-bis（2,6-dimethylphenyl）4,5-dihydroimidazol-2-ylidene]（PPh3） （Cl）2Ru-CHPh 3, were conducted in metathesis of 1-hexene. The kinetic behavior of these catalysts at 40, 50, 60 and 70℃ was compared. Complex 3 has the more active catalytic effect at temperatures 40-70℃.
文摘目的考察国药集团兰州生物制药有限公司人血白蛋白与其内包装材料的相容性。方法采用4种提取溶剂对1批内包装材料(中硼硅玻璃模制注射剂瓶和注射液用卤化丁基橡胶塞)进行提取试验,对内包装潜在的浸出物进行毒理学评估。通过模拟加速试验,对样品中的元素进行趋势分析以及玻璃瓶内表面观察;并测定长期稳定性试验过程药物常规检查项目。结果内包装材料浸出元素检出结果均≤50%的限值,有机物安全阈值(margin of safety,MOS)均>1.0,表明浸出元素及有机物在当前的暴露量下均不会对使用者有安全风险。模拟加速试验结果表明药品在长期稳定性条件放置一段时间后不会有脱片风险,长期稳定性试验药物常规检查项目均符合药典要求。结论内包材对药品质量无明显影响,总体相容性良好,可用于人血白蛋白的包装。
