Producing magnesium hydroxide is the basic way to utilize magnesium resources of natural brines. However, the effect of lithium on properties of product is always neglected. The interaction between ions in magnesium c...Producing magnesium hydroxide is the basic way to utilize magnesium resources of natural brines. However, the effect of lithium on properties of product is always neglected. The interaction between ions in magnesium chloride solution containing lithium was illustrated based on the experimental results, and the effect of lithium on the crystallization of magnesium was clarified. The results of X-ray diffraction（XRD）, scanning election microscope（SEM）, Fourier transform infrared spectroscopy（FTIR）, thermogravimetry analysis（TGA） and laser particle size analysis indicate that the effect of lithium is not obvious on the crystal phase and morphology of the products. But the XRD relative intensity of（001） surface of magnesium hydroxide declines, the specific surface area reduces apparently and the additive mass of lithium affects the heat loss rates of precipitations obviously. Quantum chemical calculations on the interactional systems of Mg（H2O）2＋6 and Li（H2O）＋4 were performed using B3LYP/6-311 G basis set. The results show that when the distance of Mg2＋ and Li＋ is 7-10 , the interaction energy is high and the trend of solvation is strong, which would make hydroxide ions easier to combine with hydrogen ions in ammonia precipitation process. And the absolute value of solvation free energy reduces significantly in MgCl2 solution（1 mol/L） containing lithium ion.展开更多
为了了解生精上皮内物质的代谢过程,4种针对大鼠溶酶体膜蛋白的单克隆抗体(Barrio et al,1986a,b)通过免疫酶标(ABC)法被用来标记了生精上皮内的4种溶酶体膜蛋白,其中初级精母细胞的溶酶体膜蛋白最丰富且围绕着核的四周;随着精细胞的成...为了了解生精上皮内物质的代谢过程,4种针对大鼠溶酶体膜蛋白的单克隆抗体(Barrio et al,1986a,b)通过免疫酶标(ABC)法被用来标记了生精上皮内的4种溶酶体膜蛋白,其中初级精母细胞的溶酶体膜蛋白最丰富且围绕着核的四周;随着精细胞的成熟与变态,其溶酶体膜蛋白显示溶酶体逐渐偏居胞核一侧并移向精子的尾部。此结果提示:(1)在生精上皮中溶酶体膜蛋白由多种蛋白所构成,其中各种蛋白的含量是不同的,(2)在生精上皮内精母细胞的合成与分解代谢最旺盛,其细胞的自溶作用也最强;(3)随着精细胞的成熟,细胞内的合成与分解代谢逐渐降低,其溶酶体的量逐渐减少。展开更多
基金Projects(51104185,51134007)supported by the National Natural Science Foundation of ChinaProject(2010QZZD003)supported by the Key Project of Central South University of Fundamental Research Funds for the Central Universities of China
文摘Producing magnesium hydroxide is the basic way to utilize magnesium resources of natural brines. However, the effect of lithium on properties of product is always neglected. The interaction between ions in magnesium chloride solution containing lithium was illustrated based on the experimental results, and the effect of lithium on the crystallization of magnesium was clarified. The results of X-ray diffraction（XRD）, scanning election microscope（SEM）, Fourier transform infrared spectroscopy（FTIR）, thermogravimetry analysis（TGA） and laser particle size analysis indicate that the effect of lithium is not obvious on the crystal phase and morphology of the products. But the XRD relative intensity of（001） surface of magnesium hydroxide declines, the specific surface area reduces apparently and the additive mass of lithium affects the heat loss rates of precipitations obviously. Quantum chemical calculations on the interactional systems of Mg（H2O）2＋6 and Li（H2O）＋4 were performed using B3LYP/6-311 G basis set. The results show that when the distance of Mg2＋ and Li＋ is 7-10 , the interaction energy is high and the trend of solvation is strong, which would make hydroxide ions easier to combine with hydrogen ions in ammonia precipitation process. And the absolute value of solvation free energy reduces significantly in MgCl2 solution（1 mol/L） containing lithium ion.
文摘为了了解生精上皮内物质的代谢过程,4种针对大鼠溶酶体膜蛋白的单克隆抗体(Barrio et al,1986a,b)通过免疫酶标(ABC)法被用来标记了生精上皮内的4种溶酶体膜蛋白,其中初级精母细胞的溶酶体膜蛋白最丰富且围绕着核的四周;随着精细胞的成熟与变态,其溶酶体膜蛋白显示溶酶体逐渐偏居胞核一侧并移向精子的尾部。此结果提示:(1)在生精上皮中溶酶体膜蛋白由多种蛋白所构成,其中各种蛋白的含量是不同的,(2)在生精上皮内精母细胞的合成与分解代谢最旺盛,其细胞的自溶作用也最强;(3)随着精细胞的成熟,细胞内的合成与分解代谢逐渐降低,其溶酶体的量逐渐减少。
