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The SiO2 gel was prepared through hydrolysis and condensation polymerization of tetraethyl orthosilicate and H2O. The gel and LaNi4.25Al0.75 powders were mixed completely and heated at 500 ℃ for 2 h to obtain samples.

摘 要：以正硅酸乙酯为原料，采用溶胶凝胶法制备多孔SiO2凝胶，将LaNi4.25Al0.75合金粉与凝胶混合在500℃进行真空烧结。

Metal/ oxide composite aerogels can be used as catalysts because of their high specific surface area. In this paper, Co-rich Co/SiO2 composite aerogels in which mass fraction of Co can reach 66%were firstly prepared by sol - gel process of Co-containing tetraethyl orthosilicate. The influence of H2O, catalyst, solvent and composition of Co-containing tetraethyl orthosilicate on the sol-gel process are discussed.

本工作首次采用含钴硅酸乙酯进行溶胶～凝胶反应来制备高钴含量的纳米级Co/SiO2复合气凝胶，制备的Co/SiO2复合气凝胶中n：n的比例最高可达2：1，且复合气凝胶中的Co含量可在小于66％的范围内任意调节，并系统研究了水量、催化剂浓度、溶剂量及含钴硅酸乙酯的组成对溶胶-凝胶过程的影响。

The solid-liquid reaction method was used for the preparation of HPLC aryl-bonded silica gel stationary phases, including 3, 5-dinitrobenzyl, quinolinyl ether and 1, 1'-di(2-naphthol) ether bonded silica gel stationary phases by using N-(β-aminoethy1)-γ-aminopropylmethyldimethoxy silane and 3-glyci-doxypropyl trimethoxylsilane as coupling reagents, respectively.

采用固液相连续反应，以N-－γ-氨丙基甲基二甲氧基硅烷和γ-丙基三甲氧基硅烷为偶联剂，分别制备了二硝基苯甲酰胺基、喹啉醚基和联萘酚醚基三种芳基键合硅胶固定相。

The apoptosis induced by extract of Russula subnigricans Hongo was investigated in little white rat liver and kidney cells by agarose gel electrophoresis.The result showed that agarose gel electrophoresis of DNA extracted from poisoned little white rat liver and kidney cellsrevealed typical 180 ~ 200bp integer-fold "ladder" bands.

亚稀褶黑菇提取液能诱导小白鼠肝肾细胞凋亡，亚稀褶黑菇提取液诱导肝肾细胞凋亡是亚稀褶黑菇中毒后机体病变死亡的重要表现形式之一 5。

The PAM and the Sesbania Gum were applied as gelling agent in the gel system of water-gel explosive and the effects of amount of gelling agent, amount of crosslinking agent, reaction-temperature and reaction time on the crosslinking time and thermal stability were researched.

并分别将产物聚丙烯胺和天然植物胶田菁胶作为胶凝剂，应用于水胶炸药凝胶体系中。研究了胶凝剂用量、交联剂用量、反应温度和反应时间对水胶炸药成胶时间和热稳定性的影响。

The PAM and the Sesbania Gum were applied as gelling agent in the gel system of water-gel explosive and the effects of amount of gelling agent, amount of crosslinking agent, reaction-temperature and reaction time on the crosslinking time and thermal stability were researched.

并分别将产物聚丙烯酰胺和天然植物胶田菁胶作为胶凝剂，应用于水胶炸药凝胶体系中。研究了胶凝剂用量、交联剂用量、反应温度和反应时间对水胶炸药成胶时间和热稳定性的影响。

To study the modulating effect of polysaccharide and protein secreted by Sphaerotilus upon the mineralization behaviors of Fe3 gel, the authors investigated the nucleation and crystallization processes of Fe3 gel inside and around the Sphaerotilus cells which were growing in the mineralization systems with urea and Stoke substrate.

本文通过观察在尿素和Stoke培养基中生长的球衣菌细胞壁内及其周围氢氧化铁凝胶的矿化过程，研究球衣菌分泌的多糖和蛋白质对氢氧化铁凝胶矿化结晶行为的调控作用。

Compared with G1 synthesized from 1,2,4,5-benzene tetracarboxylic acid and 4hydroxy pyridine at molar ratio of 1:2,G2 gelled water at higher minimum gelator concentration and gave the gel with lower gel-to-sol dissociation temperature at the same concentration.

相对于在摩尔比1：2条件下，由均苯四甲酸和对羟基吡啶合成的凝胶因子G1，在相同浓度下，G2在更高的最低凝胶因子浓度使水凝胶，并且得到的凝胶具有更低的凝胶-溶胶破坏温度。

The tetravalence vanadium was found in V2O5 gel thin films by measuring the electrical resistance change of V2O5 gel thin films with temperature, ESCA and X-ray diffraction analysis. in this paper, from miniamount redox in melting V2O5 and crystal structure, the influencing mechanism of miniamount redox on changing valence of vanadium was analyzed and discussed in detail.

通过对V2O5凝胶薄膜试样的电阻随温度的变化测试和电子能谱和X射线衍射分析发现V2O5凝胶薄膜中有四价钒的存在，本文从V2O5熔体的微量氧化还原和晶体结构的角度分析讨论了微量氧化还原影响钒离子价态变化的机理。

Therefore, the crystallite growth rate of anatase during calcination for aged gel powder was slower than unaged gel powder.

经过陈化处理的胶体粉末其粉末中的氢氧基随著陈化时间的增加而减少。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐