AntiA3typeinfluenza virus activity and toxicity for chick embryo of some heteropoly compounds containing rare earth elements were investigated. The results demonstrate that these heteropoly compounds directly inactiva...AntiA3typeinfluenza virus activity and toxicity for chick embryo of some heteropoly compounds containing rare earth elements were investigated. The results demonstrate that these heteropoly compounds directly inactivate the A3type influenza virus, and the inhibition rate of K15)2]15H2O for the A3type influenza virus is more than 90% with antivirus index TI 69. The result is obviously superior to that of the positive reference drug ribavirin.展开更多
The coarse blocky compounds in the as-cast 7075 aluminium alloys containing rare earth elements, neodymium, cerium or mischmetal were investigated by means of transmission electron microscope with EDX and scanning ele...The coarse blocky compounds in the as-cast 7075 aluminium alloys containing rare earth elements, neodymium, cerium or mischmetal were investigated by means of transmission electron microscope with EDX and scanning electron microscope. The blocky compounds in these alloys were identified as rare earth compounds, (Cr, Ti)2 RE (Al, X)20 (X is magnesium, copper and zinc),body-centred cubic, with 184 atoms to the unit cell , lattice parameter 1.453￣1. 458 nm, Vickers hardness 4000￣5600 MPa and calculated density 3400 kg/m3. The results show that the amount of blocky compounds in the alloys decreases with decreasing of Ti and Cr content or with increasing of cooling rate during solidification.展开更多
Perfluoroalkyl iodides reacted with conjugated dienes in aqueous acetonitrile solution in the presence of sodium dithionite at room temperature to give dimerization products, whereas, perfluo- roalkanesulfonyl bromide...Perfluoroalkyl iodides reacted with conjugated dienes in aqueous acetonitrile solution in the presence of sodium dithionite at room temperature to give dimerization products, whereas, perfluo- roalkanesulfonyl bromides reacted with conjugated dienes to form 1,4-adducts under actinic irradiation.展开更多
合成了Keggin结构钨硅、钨锗、钨磷、钨砷两电子及四电子稀土钐盐杂多蓝，铈量滴定及元素分析方法确定了化合物的还原电子数及化学组成，采用 IR，UV－Vis，183 W NMR和ESR等对其结构进行了表征．在人T淋巴细胞 MT－4内，对合成的化合...合成了Keggin结构钨硅、钨锗、钨磷、钨砷两电子及四电子稀土钐盐杂多蓝，铈量滴定及元素分析方法确定了化合物的还原电子数及化学组成，采用 IR，UV－Vis，183 W NMR和ESR等对其结构进行了表征．在人T淋巴细胞 MT－4内，对合成的化合物进行了系统的抗艾滋病毒（HIV-1）活性及毒性测定．发现Keggin结构钨硅、钨锗四电子稀土钐盐杂多蓝具有较强的抗HIV-1活性，其中钨锗酸钐四电子杂多蓝（代号HPBR－2）具有较高的治疗指数．展开更多
文摘AntiA3typeinfluenza virus activity and toxicity for chick embryo of some heteropoly compounds containing rare earth elements were investigated. The results demonstrate that these heteropoly compounds directly inactivate the A3type influenza virus, and the inhibition rate of K15)2]15H2O for the A3type influenza virus is more than 90% with antivirus index TI 69. The result is obviously superior to that of the positive reference drug ribavirin.
文摘The coarse blocky compounds in the as-cast 7075 aluminium alloys containing rare earth elements, neodymium, cerium or mischmetal were investigated by means of transmission electron microscope with EDX and scanning electron microscope. The blocky compounds in these alloys were identified as rare earth compounds, (Cr, Ti)2 RE (Al, X)20 (X is magnesium, copper and zinc),body-centred cubic, with 184 atoms to the unit cell , lattice parameter 1.453￣1. 458 nm, Vickers hardness 4000￣5600 MPa and calculated density 3400 kg/m3. The results show that the amount of blocky compounds in the alloys decreases with decreasing of Ti and Cr content or with increasing of cooling rate during solidification.
基金This research was supported by the National Natural Science Foundation of China as an item of major project.
文摘Perfluoroalkyl iodides reacted with conjugated dienes in aqueous acetonitrile solution in the presence of sodium dithionite at room temperature to give dimerization products, whereas, perfluo- roalkanesulfonyl bromides reacted with conjugated dienes to form 1,4-adducts under actinic irradiation.
文摘合成了Keggin结构钨硅、钨锗、钨磷、钨砷两电子及四电子稀土钐盐杂多蓝，铈量滴定及元素分析方法确定了化合物的还原电子数及化学组成，采用 IR，UV－Vis，183 W NMR和ESR等对其结构进行了表征．在人T淋巴细胞 MT－4内，对合成的化合物进行了系统的抗艾滋病毒（HIV-1）活性及毒性测定．发现Keggin结构钨硅、钨锗四电子稀土钐盐杂多蓝具有较强的抗HIV-1活性，其中钨锗酸钐四电子杂多蓝（代号HPBR－2）具有较高的治疗指数．
