硫酸

Objective: To investigate the expression changes of Versican ofCSPGs family and its ligand CD44 in spinal cord in 3d, 7d and 14d following hemisection of spinal cord injury. Furthermore, to explore the relationships of Versican、CD44 and spinal cord injury. Besides, to offer the morphological datum for the research concerning the spinal cord repair.

目的：观察大鼠脊髓半横断损伤后3天、7天、14天，损伤处上下段硫酸软骨素蛋白多糖Versican及其配体CD44的表达变化，探讨Versican、CD44与脊髓损伤的关系，为脊髓损伤后的修复研究工作提供翔实的形态学资料。

The experiment gone in a hermetical batch reactor,in this paper cellulose was hydrolyzed with extremely low acid as the catalyst in the high-temperature and high-pressure condition. Factors influencing the sugar yield and cellulose conversion ratio by hydrolysis including reaction time and the concentraction of the acid were studied systematically.

本实验是在密封性良好的间歇反应器中，以生物质的主要成分纤维素为原料，在高温高压条件下进行了极低浓度硫酸为催化剂的均相水解反应研究，系统研究了停留时间、酸浓度对水解糖产率和纤维素转化率的影响规律。

The ideal activation process parameter as follow: The nickel sulfate hexahydrate concentration 15g·L~(-1);The Sodium borohydride concentration 15g·L~(-1); The Sodium hydroxide concentration 10-15 g·L~(-1);Hydrochloric acid concentration 10-15 g·L~(-1);The activation time in A solution 9min, the activation time in B solution 90s.

理想的活化工艺参数为：硫酸镍15g·L~(-1)，硼氢化钠15g·L~(-1)，氢氧化钠10-15 g·L~(-1)，盐酸10-15 g·L~(-1)，A液中活化的时间控制在9min左右为最佳，B液中活化的最佳时间为90s。

Based on phase diagram principle, magnesium sulfate monohydrate and sodium chloride were prepared by mother liquid of sodium sulfate and magnesium chloride hexahydrate, the process conditions also were optimized. The optimum conditions were 10% excess mother liquid of sodium sulfate, 55℃ reaction temperature, 100℃ evaporation temperature and 1.326g/cm^3 end concentration of evaporation.

利用元明粉母液和六水氯化镁为原料，根据相图原理反应生产一水硫酸镁和氯化钠，对其工艺条件进行了实验优化，确定了最佳工艺条件：配料时，元明粉母液过量10%；反应温度确定为55℃；蒸发温度100℃；蒸发溶液终点比重为1.326g/立方公分。

The effects of different factors on the laser-induced graft polymerization on the PET surface were analyzed, and the mechanisms were discussed. The factors were: 1 Monomers with smaller molecules resulted in better modification than polymeric monomers. Acrylamide monomer was chosen as hydrophilic modifier finally; 2 Higher concentration of the monomer solution favored the graft reaction; 3 With the increasing laser fluence, the surface hydrophilicity of PET films increased at first, then decreased. More laser pulses led to a more hydrophilic surface; 4 Benzophenone as a photosensitizer hindered the graft polymerization; 5 The homopolymer retardant of ammonium iron sulfate hexahydrate in a proper concentration retarded the formation of homopolymers and promotes the graft copolymerization; 6 The solvent of monomer solution also affected the graft reaction. Different solvents functioned in different ways. Ethanol can promote the graft reaction because of the activity of hydrogen in its structure; 7 pH value of the monomer solution affects the polymerization rate, and a lower pH value was favorable to the graft reaction.

这些影响因素的作用分别为：1小分子单体的表面改性效果好，确定以丙烯酰胺为亲水性改性单体；2较高的单体溶液浓度有利于接枝反应；3激光能量密度增大，薄膜表面亲水性先显著增强，后又减弱；激光脉冲次数越多，改性后表面亲水性越强；4光敏剂BP对PET表面接枝聚合反应有阻碍作用；5适当浓度的均聚物抑制剂六水合硫酸铁铵能减少单体均聚物的生成，促进接枝聚合；6单体溶液的溶剂也影响接枝聚合的反应进程，不同溶剂的影响作用原理不同，含较活泼氢的乙醇能促进接枝反应；7溶液pH值影响单体聚合速率，pH值较低有利于接枝反应。

By using sodium bisulfate as the catalyst, hexyl hexanoate was synthesized.

采用硫酸氢钠为催化剂合成了己酸己酯，考察了催化剂用量、醇酸物质的量比、反应时间、带水剂用量及催化剂重复使用次数等因素对收率的影响。

The effects of magnesium sulfate mixed with sodium humate were also tested.

还对效果较好的硫酸镁和腐植酸钠混合添加剂的强化效果进行了试验。

It was shown that magnesium sulfate, sodium sulfate and sodium humate could all increase limestone dissolution rate and therefor slow down the descent of pH value.

依据实验结果，分析认为硫酸钠、硫酸镁和腐植酸钠均能促进石灰石的溶解，从而延缓浆液pH值的下降。

Experiments demonstrated that magnesium sulfate, sodium sulfate and sodium humate could effectively increase SO2 removal efficiency, while the promoting effect of black liquor was relatively low.

实验表明，硫酸镁、硫酸钠及腐植酸钠均能有效提高石灰石脱硫过程的脱硫率，而造纸黑液的效果相对较小。

Results show that the hydration rate of CaSO4 increases as the concentration of K2SO4 increases.

结果 无水硫酸钙的水化率随着硫酸钾浓度的增加而增加。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。