查询词典 carbonate-apatite

The powder of cement was composed of calcium carbonate, tricalcium phosphate and calcium phosphate dibasic.

碳酸化羟基磷灰石骨水泥的开发与多孔化研究版权属于原作者所有！

Methods:1、Nanometer calcium phosphate powder was obtained from a thermal reaction between calcium carbonate and calcium phosphate dibasic.

方法1、以碳酸钙和磷酸氢钙为原料，经过热反应，制得纳米磷酸钙粉体。

Method］(1)A new type of carbonated hydroxyapatite cementwas prepared. The powder of cement was composed of calcium carbonate, tricalcium phosphate and calcium phosphate dibasic.

［目的］应用无机化学材料合成碳酸化羟基磷灰石骨水泥，并通过发泡成孔的新方法制备能原位固化形成多孔结构的无机植骨材料。

Toothpaste generally low-grade calcium carbonate, and dicalcium phosphate used in toothpaste白药can reduce wear and tear on the teeth, the price more than 10 times higher.

牙膏一般低档碳酸钙和磷酸氢钙白药牙膏中使用，可以减少磨损牙齿上，价格超过10倍。

At present, several common sources of calcium, the calcium carbonate to the highest calcium content of the elements as much as 40 percent, much higher than calcium citrate, calcium lactate, calcium gluconate, dicalcium phosphate, calcium hydride.

目前常见的几种钙源中，以碳酸钙的元素钙含量最高，高达40%，大大高于柠檬酸钙、乳酸钙、葡萄糖酸钙、磷酸氢钙、氢化钙等。

Reaction of 5'-O-p-methoxytrityl-thymidine with 1, 1'-carbonyl-diimidazole gave the 3'-O-carbonylimidazolide, which was condensed in high yield with 3'-O-protected thymidine to give a dithymidine carbonate. In the same way, we obtained the protected trithymidine dicarbonate. After deprotection, we obtained quantatively the trithymidine dicarbonate.By the same stratagy, we completed the synthesis of dithymidine sulfite.It was shown that allyl can be used as a good protection group for hydroxyl of ribose in the synthesis of oligonucleotides consisting in some unstable nucleotide analogues.

我们在第一部分工作的基础上，以烯丙基作为3'-OH的保护基合成了保护的三胸苷碳酸酯以及二胸苷亚硫酸酯，用我们所得的脱保护条件进行了脱保护研究，得到了三胸苷碳酸酯以及二胸苷亚硫酸酯，并研究了它们合成中的一些化学问题，结果表明：烯丙基能很好地运用于这两类寡核苷酸类似物的合成中，其脱保护条件为中性，不会影响碳酸酯键及亚硫酸酯键。

The said process can obtain diethyl carbonate product with purity as high as 99.5%.

采用本发明分离提纯碳酸二乙酯的方法，可以得到碳酸二乙酯含量为99.5％的产品。

When diethyl carbonate was used as transesterification reagent,the convertion of phenol and the yield of DPC had improved,but the extant was small.

以碳酸二乙酯为酯交换试剂，苯酚的转化率和DPC的产率都有所提高，但提高的幅度不大。

When all the sodium has dissolved, a mixture of 164 parts of ethyl phenylacetateand 118 parts of diethyl carbonate is added during 5 minutes and the mixture is maintained at the boil for a further hour.

当所有的纳都溶解后，然后在五分钟内添加164份乙基乙酸苯酯和118份二乙基碳酸酯的混合物，混合物再另外维持一个小时的沸腾状态。

This invention provides a polymerizer and polymerization equipment for producing an aromatic polycarbonate by melt transesterification from a molten prepolymer, of the aromatic polycarbonate, produced from an aromatic dihydroxy compound and a diaryl carbonate.

本发明提供了一种用于通过熔融酯交换由芳族聚碳酸酯的熔融预聚物生产芳族聚碳酸酯的聚合器和聚合设备，其中芳族聚碳酸酯的熔融预聚物由芳族二羟基化合物和碳酸二芳基酯生产。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。