柠檬酸

It was established that, the fish skin was stirred two times with 2.5% or 5% NaCl solution at a ratio of material to solvent of 1:10 at about 5℃ for 12h, about 5.9%, 6.7%, 9.1% soluble non-collagenous protein could been separated from skin of silver carp, bighead carp and grass carp, then by homogenizing with acid at a ratio of material to solvent of 1:30, about 78.9%, 84.1%, 82.0% of collagen from skin of silver carp, grass carp and bighead carp could be extracted by acetic acid or citric acid.

结果表明，鲢、鱅鱼皮经2.5％NaCl溶液(1：10)，草鱼鱼皮经5％NaCl溶液(1：10)，温度5℃左右，12h磁力搅拌处理二次，除去的可溶性蛋白分别占原总蛋白的5.9％、6.7％、9.1％。鱼皮再经加酸(1：30)溶胀、均质处理后，即可得到鱼皮胶原蛋白的粗提取液，鲢、草鱼鱼皮的酸提取回收率以醋酸为最高，分别为78.9％、84.1％，鱅鱼皮以柠檬酸为最高，约为82.0％。

The mean diameters of silver nanoparticles prepared by silver nitrate-sodium citrate reduction method are measured by transmission electron microscope.

用透射电子显微镜测量了用硝酸银柠檬酸钠还原法制备出的银纳米微粒的平均粒径。

It was found that the silver citrate emulsion reach the nano scale in the conditions of 2% PVP and 2 hours grinding. The silver citrate was reduceed completely when Vc excessive double.

研究结果表明，当PVP含量为2%，研磨时间为2小时时，得到了纳米级的柠檬酸银乳液。

Sliver nanoplates were prepared through a visible light induced reduction process by a reaction between sodium citrate and silver nitrate in an aqueous solvent at room temperature. UV-Vis spectra were employed to monitor the growth of the silver nanoplates.

在水相体系中以柠檬酸钠和硝酸银为反应物，利用可见光诱导的还原过程在室温下制备盘状的银纳米粒子，通过紫外-可见光谱监控了不同反应条件下银纳米粒子的生长过程及体系的稳定性。

To investigate the applications of nano-silver colloid in conductive silver film,the nano-silver colloid was synthesized using ascorbic acid reduce silver citrate nano-emulsion in the presence of polyvinylpyrrolidone as a protected agent.

为了合成纳米银胶并考察其在制备导电银膜方面的应用性能，在聚乙烯吡咯烷酮保护下，利用抗坏血酸还原柠檬酸银纳米乳液，合成了纳米银胶，并将其用迈耶棒涂布在支持体上制备了纳米导电银膜。

Any method of the citrate sol-gel method, the self-propagating method or the coprecipitation method is adopted to prepare the product required.

采用柠檬酸盐溶胶-凝胶法、自蔓延法或共沉淀法中任一种制备得到所需产品。

Composite photocatalysts Fe/ZnO-TiO2 with 12~48 nm in grain size and pure titanium dioxide powder were prepared with self-combustion process of citric acid sol.

采用柠檬酸溶胶自燃烧法制备粒径为12~48 nm的复合催化剂Fe/ZnO-TiO2及纯TiO2粉体。

The La0.6Sr0.4Co0.2Fe0.8O3-δ composite oxide was prepared via combined EDTA-citrate complexing process with concentrated nitric acid treatment. The treatment would result in the self-combustion of solid state precursors at low temperatures.

在EDTA-柠檬酸联合络合法制备LSCF复合氧化物的过程中，利用浓硝酸对LSCF的固态前驱体进行处理，实现前驱体低温自燃烧反应。

Its preparing process includes dissolving the salts containing metal in group VIB or VII or their mixture in ammonia water until full dissolving, and adding citric acid to stabilize the solution.

其制备方法为：先用氨水溶解含ⅥB族金属或Ⅷ族金属的盐，或二者混合物，使之完全溶解后，加入柠檬酸以使溶液稳定。该溶液稳定性好，制备过程快速、简便、节能。

An impregnating solution for hydrogenating or hydrocracking catalyst contains the oxide of metal in group VIB (0.08-0.35g/ml), the oxide of metal in group VII (0.01-0.5g/ml) and citric acid (0.05-0.3g/ml).

本发明涉及一种加氢催化剂，特别是加氢处理催化剂所用浸渍溶液及其制备方法。此溶液中含ⅥB族金属氧化物为0.08～0.35g/ml，Ⅷ族金属氧化物为0.01～0.10g/ml，柠檬酸为0.05～0.30g/ml。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。