碳酸

The bioactivity of titania coatings before and after modification were investigated by simulated body fluidtests in vitro.X-ray diffraction,Scanning electron microscope,Fourier transform infrared spectroscope and Energy diffraction spectroscope were used to investigate the microstr...

结果表明：氧化钛涂层和钛合金基体的结合强度较高，其值高达40MPa，涂层的耐模拟体液腐蚀性优于钛合金。酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石，显示良好的生物活性。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性，不但是最好的通用的阀门，用于处理碳化氢，植物油，溶剂等，还特别适用于严酷的应用环境，如丁烷，丙烷，丁二烯，丙酮，乙醇，氨，无水氨，苯，氯乙烯，干氯，道氏热载体，乙烷，乙烯，氯化氢，萘，氧，氢，邻苯二甲酸酐，干碳酰氯，磷酸，碳酸钾，苯乙烯，融化硫，二氯化硫，以及温度在-184oC至232oC之间，压力在阀门额定压力等级范围内的有关应用。

Amides were prepared in good yields under mild and neutral conditions. In chapter three,we simply outlined the applications of biscarbonate in synthesis of pharmaceuticals and their intermediates.

第三章，首先我们介绍了光气的理想替代品——双碳酸酯的物理化学性质及其在医药中间体合成中的应用。

Then the experiments on the separation of lithium and magnesium from bitterns contenting lithium were carried out, during the experiment NaOH was chosen as addition to further remove magnesium from the extraction liquid and Na_2CO_3 was chosen as deposition agent to prepare Li_2CO_3 product.

作者选取磷酸三丁酯为萃取剂，200#溶剂汽油为稀释剂，氯化铁(FeCl_3)为共萃取剂，对盐湖含锂卤水进行萃取分离镁锂的试验，然后采用氢氧化钠对萃取液进行深度除镁，再用碳酸钠作为沉淀剂制备碳酸锂产品。

PepsiCo has invested over RMB8 billion in setting up 20 bottlers, 1 non-carbonated beverages plant and 1 concentrate plant in 20 cities all over China.

百事已在中国20个城市设立了20家灌瓶厂， 1家非碳酸饮料工厂和1家浓缩液厂，投

PepsiCo has invested over RMB8 billion in setting up 20 bottlers, 1 non-carbonated beverages plant and 1 concentrate plant in 20 cities all over China.

百事已在中国20个城市设立了20家灌瓶厂， 1家非碳酸饮料工厂和1家浓缩液厂，投资总额超过80亿人民币。

Several carbonates are synthesized from carbamates either with hydrochloride as coreactant or with zeolites as catalysts under low temperature and pressure, whereas high yield is achieved through either the formation of ammonium chloride as precipitate or the adsorption of ammonia in zeolites.

在较低温度和压力下，以氯化氢为共反应物或沸石分子筛为催化剂，由氨基甲酸酯与醇反应合成多种碳酸酯。

Latest researches in the catalysts for synthesis of carbamate by ammonolysis of dimethyl carbonate;2. Progress in the catalysts for synthesis of carbamates by ammonolysis of dimethyl carbonate;3.4,4′-Methylene diphenyl carbamatewas synthesized by ammonolysis of dimethyl carbonate, a substitute of phosgene, and 4,4′-diaminodiphenyl methane with anhydrous zinc acetate as catalyst.

用碳酸二甲酯代替光气，以4，4′-二氨基二苯基甲烷为原料，在无水醋酸锌催化剂的作用下，经胺解反应合成了4，4′-二苯甲烷二氨基甲酸甲酯；测定了MDC的熔点；采用傅里叶变换红外光谱和氢核磁共振对产品结构进行了表征；考察了反应温度、DMC用量、反应压力、反应时间、催化剂用量对MDC收率的影响。

Fruit juices, cordials, mineral waters, carbonated drinks,beers, wines and spirits are all on display, and with over 11,000 interested professionals to meet, there are plenty of opportunities for business.

展出产品包括果汁、功能性饮料、矿泉水、碳酸饮料、啤酒、红酒及烈酒，吸引了11，000余名观众前来参观，同时也带来了很多商机。

This reporter has learned that the checks had failed to pass the carbonated drinks in the main problem is that some products mold, yeast and cyclamate standard, there are some products in carbon dioxide levels do not meet standards.

记者了解到，检查中不合格的主要问题是碳酸饮料的部分产品霉菌，酵母菌和甜蜜素标准，还有二氧化碳含量有些产品不符合标准。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。