碳酸

Dimethyl carbonate was used as the methylating reagent, o-vanillin as the material and K2CO3 as the catalyzer to synthesize oV. The effect of material ratio, reaction time, reaction temperature and catalyzer dosage on its synthesis reaction was investigated.

方法］采用碳酸二甲酯作为甲基化试剂，以邻位香兰素为原料，无水碳酸钾为催化剂，合成邻藜芦醛，研究物料配比、反应时间、反应温度和催化剂量对反应的影响。

The mechanisms for AP of the main compositions of composite propellants with additives such as ammonium oxalate, strontium carbonate and AO/SC were studied by FTIR and DSC.

采用傅里叶变换红外吸收光谱和差示扫描量热法研究了草酸铵，碳酸锶及复配的草酸铵/碳酸锶等添加剂对复合固体推进剂主要组分高氯酸铵的作用机理。

This Technology adopts green chemical product---Dimethyl Carbonate to substitute carbonyl chloride and exchange with Phenolic Esters to produce Diphenyl Carbonate.

本技术用绿色化工产品碳酸二甲酯代替光气与苯酚酯交换生产碳酸二苯酯，是一条清洁生产工艺。

And precipitation rate of vanadium was higher than 98.5%. Five vanadium catalysts were made withγ-Al_2O_3 and the mesoporous molecular sieve MCM-41 as carrier, and were made by dipping method, intermingle process and functionalizing method respectively. The characterization of their pore size, crystal structure, specific surface area and V_2O_5 load of catalysts were studied by XRD, the adsorption /desorption of N_2 technique, Raman spectroscopy and XRF. The activities of the catalysts estimated by the synthesis of DPC with DMC and phenol.

钒催化剂的制备与表征及活性评价：是分别以γ-Al_2O_3和介孔分子筛为载体，采用浸渍法，掺杂法及官能化法制备了5种钒催化剂；分别对其进行了XRD分析、N_2吸附-脱附分析、红外光谱分析和荧光分析，对其孔径、晶型结构、比表面积和V_2O_5负载量进行了表征；以碳酸二甲酯和苯酚的酯交换合成碳酸二苯酯的典型反应为依据，对钒催化剂进行了活性评价。

Once the patient is admitted to the hospital, add sodium bicarbonate ampules of 50 mEq/L to each second or third bottle of glucose, so that the pH of the urine is maintained above 6.5 (the usual requirement for bicarbonate is 200–300 mEq/L for the first day).

一旦患者被送至医院，在输注第二或第三瓶葡萄糖溶液时，加入50 mEq/L的碳酸氢钠，这样尿液pH值可维持在6.5以上（通常第一天碳酸氢盐的需要量为200–300 mEq/L）。

The igneous carbonatites generated in the first and the second periods are distributed in northern and southern margins of the North China Craton, and the third one is recognized in the eastern and central parts of this craton.

在空间上，前两个拉张阶段形成的火成碳酸岩分布在华北克拉通的北缘和南缘；后一个拉张阶段形成的火成碳酸岩分布在克拉通的中部和东部。

Strict standards for the provisions of cyclamate in the carbonated drinks in the use of limit is ≤ 0.65g/kg, carbon dioxide in carbonated drinks can be suitably used in accordance with production needs.

为在限制使用的碳酸饮料中甜蜜素的规定严格的标准是≤0.65g/kg，碳碳酸饮料的二氧化碳可以适当使用与生产的需要进行。

For examples as an additive for lithiumion batteries,as a component of surface coatings or as a monomer for the preparation of polyvinylene carbonate,and the Diels-Alder reaction was carried out successfully between vinylene carbonateand many dienes.

碳酸亚乙烯酯作为聚合物单体可在自由基引发作用下形成较高分子量的聚碳酸亚乙烯酯，另外VC可以和许多二烯类化合物发生反应，合成出许多精细化工中间体。

The main products are: the indirect method zinc oxide Zno99.7, Zno99.5, special rubber zinc oxide, light magnesium oxide, activated magnesium oxide, magnesium oxide wire and cable, adhesives dedicated magnesia, light magnesium carbonate, basic zinc carbonate, rubber accelerator TMTD, rubber Antioxidant: RD, DFC-34, SP-C, 4010,4010 NA of the Company to " With faith in order to survive, rely on technology and development, quality-oriented "approach, the vast numbers of users at home and abroad to win the trust and support, established a good cooperative relationship.

主要产品有：间接法氧化锌Zno99.7、Zno99.5、橡胶专用氧化锌、轻质氧化镁、活性氧化镁、电线电缆专用氧化镁、胶粘剂专用氧化镁、轻质碳酸镁、碱式碳酸锌、橡胶促进剂TMTD、橡胶防老剂：RD、DFC-34、SP-C、4010、4010NA 本公司以&凭诚信求生存，靠技术求发展，质量为本&的方针，赢得国内外广大用户的信赖与支持，建立了良好的合作关系。

By studying the inorganic CO〓 and helium isotopes in Yinggehai Basin, and investigating the Tertiary lithology and geothermal condition, combined with the results of thermal simulation test, it was suggested that inorganic CO〓 gas principally came from thermal decomposition of Tertiary calcareous shales and Pre-Tertiary carbonate under the burial depth of 6000m, approximately at a strata temperature of about 250℃.

通过系统地剖析莺歌海底辟带气田无机CO〓的碳、稀有气体同位素特征与第三系及古生界基底的岩性及热源条件，结合热模拟实验资料，认为无机CO〓主要来深埋的梅山-三亚组钙质泥岩热分解和前第三系基底碳酸岩的热变质，这种钙质泥岩和碳酸岩热分解产生CO〓的初始温度大约为250℃，相当于埋深约6000m。

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。