Penicillin G acylase has been successfully immobilized covalently on E-CIMS supports, and PGA/E-CIMS (molar ratio of TEVS and TEOS=1∶9) behaves the initial specific activity of 2262 IU/g and the best operational stability of 80% of the initial specific activity after recycled for 5 times.
将E-CIMS介孔分子筛用于青霉素酰化酶的固定化，当分子筛合成母液中乙烯基三乙氧基硅烷与正硅酸乙酯的摩尔比为1∶9时，固定化酶的表观活性为2 262 IU/g，循环使用5次后的操作稳定性最好，达到80%。
The results indicated that hydrogen bond and covalence bond were formed between PVA and TEOS through the sol-gel reaction.
结果表明PVA与无机相发生溶胶-凝胶反应生成氢键和共价键Si-O-Si，形成交联有机聚合物／无机杂化体系，使杂化膜的结晶度减少，控制了膜的溶胀，提高膜的溶解选择性能，但膜的溶胀减少会使通量有所下降。
We can find the densify after CVD TEOS deposited will also improve the characteristics of data retention.
而且我们发现在化学气相沉积四氧乙基矽酯的氧化层形成之后做致密化的处理也可以改善资料保存度的特性。
The results show that the perfect Honeycomb pattern films without defects within area of 0.8cm^2 can be obtained at the PS concentration ranges from 20 mg/mL to 50 mg/mL and PS/TEOS mass ratio less than 2. The films cast from the chloroform solution of dicarboxyl terminated PS were more perfect than those cast from the chloroform solution of monocarboxyl terminated PS. The perfect Honeycomb structure films could be obtained with both chloroform and benzene as solvents, but the pore diameter of films cast from benzene solution of PS was larger than that of films cast from chloroform solution of PS.
研究结果表明，聚合物浓度在20~50mg/mL，PS/TEOS质量比大于2：1的条件下可以制备结构完整的多孔膜，且制备的Honeycomb结构在0.8平方公分内无缺陷；采用双羧基封端的聚苯乙烯成膜效果好于单羧基封端的成膜效果；以氯仿和苯作为溶剂均可以制备完全Honeycomb结构的复合膜，但以苯为溶剂制备的多孔膜孔径较大。
Malachite Green (C. I. Basic Green 4) MG, Guinea Green (C. I. Acid Green 3) GG and Reflex Blue R54 (C. I. Pigment Blue 61) RB were embedded into silica matrices via sols synthesized by hydrolysis of TEOS in water and ethanol.
孔雀绿(正一碱性绿4)镁，几内亚绿(酸性绿3) GG和反射蓝色晴空(颜料蓝61)经常被嵌入到二氧化硅矩阵经溶胶合成水解的TEOS在水和乙醇。
The hydrolysis rate constant of TEOS in mixed systems was larger compared with TEOS in single precursor systems.
与单前驱体水解一致的是，在双前驱体系中TEOS和DDS自身的反应级数仍保持一级，但是氨和水的反应级数都有不同程度的增大。
And the mechanism of the change is discussed.
利用扫描电镜可以看出，随着TEOS和氨水加入量的增加，SiO2颗粒的粒径增大，并探讨了其变化机理。
In the aspects of research method, we took the method of preparing sol at first and then impregnating the wood to obtain ceramic-wood composite; this method made the wood use efficiently and increased the wood`s weight gain percent. The ceramic-wood composite with performances of well decay resistance, dimensional stability, effloresce resistance and high strength was obtained by importing the cymene to the net of gel as the result of co-hydroxylation between MTES and TEOS. Making use of XPS, we found that the apex of Si2p、O1s、C1s had evident chemical shift, which validated the existence of Si-O-C bonding. Key Words: Sol-gel, Ceramic-wood composite, Modified sol, Ecomaterials
在工艺方法上，采用先制备溶胶，然后浸注木材的工艺方法具有原料利用率高、提高增重率的优点；采用甲基三乙氧基硅烷和正硅酸乙酯共水解的方法，将甲基引入陶瓷化复合木材的凝胶内部，所制备的材料具有尺寸稳定性好、具有耐风化和耐腐朽性，强度高的特点；首次利用X射线光电子能谱，发现了Si2p、O1s和C1s谱峰发生了明显的化学位移，证实了Si－O－C键合作用的存在。
Henry constant, adsorption heat, separation factors followed the same order:n-butylbenzene＞n-propylbenzene＞ethylbenzene＞toluene＞benzene. Henry constant, adsorption heat, separation factors increased with the increase of the mass ratio of PMHS/TEOS.
结果表明，上述3种材料均能够实现苯及其同系物的完全分离，相应的亨利常数、吸附热、分离因子的大小顺序为：正丁基苯＞正丙基苯＞乙苯＞甲苯＞苯，且随着PMHS/TEOS比例的增加，亨利常数、吸附热以及分离因子都增加。
The anti-oxidation mechanism of the soakers containing mainly HBO2, H3PO4, TEOS and their mixed solution is analyzed.
并对以硼酸，磷酸和TEOS及其混合液为主的浸渍剂的抗氧化机理进行了分析和探讨。
At atmospheric pressure, SiO, films were deposited by using DBD plasma gun in different precursors (TEOS, HMDSO, and D4) with Ar as carrier gas in 16 kHz high voltage power. The effects of plasma power and flow rate of carrier gas on the film properties were investigated.
在大气压下，利用工作在16kHz的介质阻挡放电等离子枪，以氩气为工作气体，分别用四甲基硅氧烷、六甲基硅氧烷和八甲基环四硅氧烷(D4)为单体，通过改变载气流量、等离子体放电功率等研究聚合SiO薄膜的结构性能影响。
In the process of hydrophobic modification, silica alcogels are prepared at 60℃ by keeping the optimized molar ratio of p-TEOS、EtOH、H2O and HF. Then the wet gels are modified by different modification agents(TMCS、HMKD、HMDSO).
在后疏水改性体系中，首先采用优化的反应物配比在60℃制备出醇凝胶，然后采用不同的改性剂(TMCS、HMKD和HMDSO)在60℃对凝胶进行改性。
In addition, Si-O network was formed on the surface of fillers after hydrolization of TEOS.
正硅酸乙酯水解后在填料表面形成了Si-O网络。
The results show that TEOS titration step by step is propitious to round, monodisperse and compact SiO2 synthesis. Under condition of reaction temperature of 25℃, TEOS moore concentration of 0.12mol/L, ammonia of 14.8mol/L, deionized water, and the pH value controled between 9~12, monodispersed silica spheres 200~250 nm in diameter, diametical consistency about 0.5 and standard deviation 7.5% were obtained. The formation mechanisms of SiO2 under different reaction conditions were also discussed.
分析表明，采用正硅酸乙酯分步滴定法能提高二氧化硅微球的球形度、窄分布、单分散与致密性同时，在反应温度25℃、正硅酸乙酯浓度0.12mol/L、氮浓度为15.0mol/L、去离子水浓度0.90mol/L、无水乙醇浓度2.35mol/L、pH值为9~12的条件下，获得了直径约200~250nm、粒径一致性约为0.5、分布偏差约为7.5%的球形二氧化硅单分散颗粒；研究和讨论了二氧化硅微球的形成机理。
Since the SBA-15 was prepared by acid system, the formation of mesoporous molecular sieves in general has experienced (S0H +) X-I + self-assembly process (I was positively charged silicon species, X-for halogen ion or radical anion; S0 compared with surfactant), inorganic species TEOS reaction (1), at the same time surfactant in the hydrophilic EO in strong acidic conditions and interaction between hydrogen ion hydration reaction (2)(Here R is alkyl or polypropylene oxygen, X-for Cl-, F -, I-, NO3-, etc.).
由于SBA-15是在酸性体系下制备的，介孔分子筛的形成一般经历了(S0H+)X-I+自组装过程(I为带正电的硅物种，X－为卤离子或酸根阴离子； S0则为表面活性剂)，无机物种正硅酸乙酯发生反应(1)，同时表面活性剂中的亲水基EO在强酸性条件下与水合氢离子相互作用发生反应(2)(这里R为烷基或聚丙烯氧基，X－为 Cl-，F -，I-，NO3-等)。
For example if a silicon nitride film replaces a TEOS deposited oxide film, the slurry can easily be re-optimized for the new system.
如SiN膜取代TEOW淀积氧化物膜，对新系统可以容易地重新优化磨料。介绍了几种磨料组分浓度的去除速率和选择比。
Gradient GF/SAN composites were obtained by treating short glass fibers with strong oxidants, TEOS and PTES in acid solution respectively.
玻璃纤维复合增强塑料是由树脂基体和GF增强体构成的多相材料，通过应力在基体中向纤维材料的有效传递，使具有一定强度和刚度的GF成为承受材料力学破坏的主体，从而得到明显的力学增强效果。
Mesoporous molecular sieveswith Ia3d structure with large pore and higher hydrothermal stability wassynthesized under conventional strong acidic hydrothermal conditions in thepresence of P123, using TEOS and PTES as silicon source. Titanium wasintroduced into the MS through liquid deposition method with tetra-n-butyltitanate as titanium source.
在强酸性条件下，首次以正硅酸四乙酯和苯基三乙氧基硅为硅源，P123 为模板，水热合成了具有较大的孔径和较高水热稳定性的Ia3d 立方结构中孔分子筛，并通过化学液相沉积的方法对该分子筛进行了钛原子掺杂。
After hydrolysis of TEOS for some time, 〓 was added to the sol solution.
它是即在用盐酸作为酸性催化剂水解一定时间的溶胶中，加入六次甲基四胺作为碱性催化剂。
The comparison of hydrolysis-polycondensation reaction and microstructure of ORMOSILs derived by TEOS, MTES, VTES, ETES confirms that the influence of organic group such as methyl, vinyl, ethyl and ethoxyl on the hydrolysis and polycondensation reaction rate depends on several factors including electron-donating capability, size and number of ethoxyl group which can participates polycondensation reaction.
确认甲基、乙烯基和乙基和乙氧基等改性基团对硅醇盐水解-缩聚反应速度的影响是取决于有机改性基团的电负性、尺寸和可水解的-OR基团数目等因素综合作用的结果，其水解速度依MTES＞TEOS＞VTES＞ETES的顺序递减。由于Si原子上可聚合的基团数目减少，导致MTES、VTES和ETES的聚合反应速度降低，而与水解速率失配。