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Equivalent conductivity and its activation energy of NaF-AlF3 melts HU Xian-wei(胡宪伟), WANG Zhao-wen(王兆文), GAO Bing-liang(高炳亮), SHI Zhong-ning(石忠宁), KAN Hong-min(阚洪敏), LUO Xu-dong(罗旭东... and composition, and relationship between equivalent conductivity activation energy and composition of the melts were then studied on the basis of two-step decomposition mechanism of AlF63-. According......
Ce3+对细胞内游离Ca2+的影响 雷衡毅1,申治国2,杨燕生1,庄志雄2,黄海雄2 (1.中山大学化学与化学工程学院,广东广州,510275;2.深圳市卫生防疫站,广东深圳,518020) 摘要:研究了Ce3+对肝细胞和V79细胞中游离Ca2+的影响.低浓度的Ce3+能使肝细胞内游离Ca2+浓度增高,高浓度的Ce3+能使肝细胞内游离Ca2+浓度显著升高. Ce3+可促进细胞外Ca2+的内流,高浓度的Ce3+对细胞是有毒性的. 关键词:稀土; 铈; 游离钙; 肝细胞; 显微荧光术; [全文内容正在添加中] ......
Tb3+离子发光探针研究Ca2+,La3+和Al3+与拟南芥钙调素的竞争结合 肖凤娟1,孙大业2,刘德龙3,白娟2 (1.石家庄铁道学院材料分院,河北,石家庄,050043;2.河北师范大学生命科学学院,河北,石家庄,050091;3.河北师范大学化学学院,河北,石家庄,050091) 摘要:利用Tb3+离子的发光, 研究了Tb3+与拟南芥钙调素 (CaM)结合的荧光光谱及荧光滴定曲线特点, 然后利用Tb3+4*CaM系统在221 nm直接激发和280 nm敏化激发的光谱变化研究了Ca2+, La3+和Al3+与拟南芥钙调素 (CaM) 的竞争结合作用. 结果表明: Tb3+, La3+与钙调素的竞争结合能力强于Ca2+, 而Tb3+的竞争结合力又大于La3+, Ca2+与钙调素的结合力远大于Al3+. 竞争实验的结果从分子水平上揭示了Tb3+, La3+和Al3+等金属离子生物效......
Quantum-mechanical study of effect of lattice defects on surface properties and copper activation of sphalerite surface CHEN Jian-hua(陈建华)1, CHEN Ye(陈 晔)2, LI Yu-qiong(李玉琼)2 1. College... on the copper activation of sphalerite were investigated. Calculated results indicate that both Fe and Mn impurities narrow the band gap of sphalerite surface and lead to the Fermi level shifting......
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Research on Uncrystallized Phosphating Film TANG En-jun1,XING Ze-kuan1 (1.No. 5719 Factory of PLA Pennzoil, Sichuan 611937, China) 摘要:This article excogitated a kind of uncrystallized phosphating film bears wearing capacity goodly by adding Ca2 + in normal phosphating solution. This technology is very useful to protect steel parts working in oil from abrasion. 关键词:phosphating film; Ca2......
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Effect of mechanical activation on alkali leaching of chromite ore ZHANG Yang(张 洋)1, 2, ZHENG Shi-li(郑诗礼)1, DU Hao(杜 浩)1, XU Hong-bin(徐红彬)1, ZHANG Yi(张 懿)1 1. National Engineering Laboratory...; Abstract: Mechanical activation was used to improve the extraction of chromium in molten NaOH......