1、

Nanometer CeO_2 powders were prepared by means of microwave radiation using cerous nitrate and ammonium hydrogen carbonate.

以硝酸铈为原料,碳酸氢铵为沉淀剂,用微波加热的方法制备了纳米CeO2超细粉体。

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2、

The synthesis of butyl acetate with acetic acid and butanol as reactants and ammonium ceric sulfate as catalyst was studied. Through experiment, the influencing factors of reaction were investigated. The results showed that the esterification rate is over 93.4%.

研究了以硫酸铈铵为催化剂,乙酸和正丁醇为原料合成乙酸正丁酯,通过试验确定了最佳合成条件,结果表明,在适宜条件下其酯化率可达93.4%。

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3、

A green method for ceric hydroxide synthesis with cerium carbonate and hydrogen peroxide as main raw materials is reported, and two products, ceric hydroxide and sodium acetate, are obtained.

研究了氢氧化铈合成的绿色方法.以碳酸铈和醋酸为主要原料,最后获得氢氧化铈和醋酸钠。

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4、

The team of researchers, led by Fuhua Yang at Wuhan University, China, modified hepatitis delta to carry'molecular scissors'that cut into the genetic material of hepatitis B.

中国研究小组的首席科学家是武汉大学的Fuhua Yang,他们把delta型肝炎病毒改造成一个“分子剪刀”,可以截断乙肝病毒的复制原料。

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5、

Package Description: According to customer request PackageRaw materials: electric galvanized iron wire, hot-dipped galvanized wire and black wire.

包装说明:按客户要求进行包装所需原料:电镀锌铁丝、热镀锌铁丝和黑铁丝。

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6、

Moulds made of natural graphite powder have been studied. Using fly ash as the main material along with a proper quantity of clay and admixture, the experiment is conducted to produce Lytag through sintering the mixture.

采用天然石墨粉无粘结剂冷压成型方法制作的模具有一定的机械强度,可应用于粉末冶金工艺。本实验以粉煤灰为主要原料,适量添加粘土及外加剂,用烧结法制备粉煤灰陶粒。

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7、

Preparation of Water Soluble Dispersant Agent from Cane Dregs

以甘蔗渣为原料制备水溶性分散剂的研究

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8、

Diethyl succinate was synthesized from succinic acide and absolute alcohol with anhydrous ferric chloride catalyst under normal atmosphere. Water clarifying agent& Ferric chloride

报道了以丁二酸和无水乙醇为原料,在无水氯化铁催化下合成丁二酸二乙酯的反应条件。GB4482-1993净水剂氯化铁

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9、

Diethyl glutarate was synthesized using glutaric anhydride and ethanol, which were separated from dicarboxylic acid, as raw material, heteropoly acid as catalyst.

以从二羧酸中分离出的戊二酸酐和乙醇为原料,用杂多酸为催化剂,合成了戊二酸二乙酯。

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10、

Kuerle fragrant pear pomace is used as raw materials to extract soluble dietary fiber with single factor experiments and orthogonal tests.

本研究以苹果梨果渣为原料,采用化学法分离不溶性膳食纤维,并测定了其化学组分和物理特性。

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11、

At present, we over-focus on stock prices brought about by the loss, in fact, prices of raw materials for Chinese enterprises is a good opportunity is in the throes of inventory digestion period.

目前大家过分关注于存货跌价带来的损失上,其实原料价格暴跌对于中国企业更是一个很好的机会,目前正处于消化存货的阵痛期。

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12、

This work mainly focuses on: ( 1) A series of phosphate catalysts have been prepared by precipitation method and sol-gel method respectively. The effects of preparing method, materials, conditions of drying and calcination on the properties of the catalysts have been investigated.

本研究主要包括以下内容:(1)分别以沉淀法和溶胶-凝胶法制备磷酸盐系列催化剂,考察了制备方法、原料、干燥、煅烧等条件对催化剂性能的影响。

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13、

SiC was prepared with siliceous colliery waste, quartzite, anthracite coal and weakly caking coal by Acheson process. The microstructure of siliceous colliery waste was investigated by SEM.

分别以硅质煤矸石、石英砂与弱粘煤、无烟煤作原料用Acheson工艺合成了SiC,并研究了硅质煤矸石的微观结构。

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14、

Preparations of cefotiam intermediate 7-ACMT and cefazolin intermediate TDA were discussed as raw material of 7-ACA.

以D-7-ACA为原料,探讨了头孢替安中间体7-ACMT和头孢唑林中间体TDA的合成。

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15、

So we determined the physicochemical index for raw material selection of cefuroxime sodium reference standard.

据此确定了头孢呋辛钠标准物质原料选择的理化指标。

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16、

Common donor dopants are Y 3+ and Nb 5+ Usually donor doped content lies in range from o 2 to 0 3 percent Factors influencing on the content are purity of used raw materials, flux for sintering, donor doping process and the others.

常用的施主加入物是Y3+和Nb5+,施主掺入量一般控制在x=0.2%~0.3%为宜。影响施主掺入量的因素有原料纯度、烧结助剂、掺入施主的工艺等。

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17、

Conductive Polyaniline was prepared by chemical oxidation using aniline as the starting material and hydrocarbon as the doping agent.

以苯胺为主要原料,盐酸作掺杂剂,采用化学氧化法制备出导电聚苯胺。

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18、

Nipagin esters were synthesized by the esterification of dodecyl and octadecyl alcohol with p-hydroxybenzoic acid in the presence of vitamin C.

以维生素C为催化剂,对羟基苯甲酸和十六醇及十八醇为原料合成尼泊金十六酯与尼泊金十八酯。

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19、

We have cheap labor, land, buildings and raw materials, but lack funds, technology and managerial expertise.

我们有廉价的劳动能力 、 土地 、 厂房和原料, 但缺乏资金 、 技术和管理技能.

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20、

The preparing technology of transparent magnesium carbonate and its operating conditions are discussed.

研究了以白云石为原料制备透明碳酸镁的生产工艺及操作条件.

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