碳酸

Diphenyl carbonate is an important carbonic ester, an important precursor for the synthesis of polycarbonate without using phosgene.

碳酸二苯酯是一种重要的有机碳酸酯，是非光气法合成聚碳酸酯的关键原料。

The main products 40,000 tons / year potassium carbonate, 60000 tons / year of potassium bicarbonate, 1,000 tons / year of 3,4 dichloroaniline, 6000 tons / year dimethyl sulfoxide, 2.5 thousand tons / year Xylitol, 1000 tons / year, such as high-purity hydrogen.

主要产品为4万吨/年碳酸钾，6万吨/年碳酸氢钾，1000吨/年3，4二氯苯胺，6000吨/年二甲基亚砜，2500吨/年木糖醇，1000吨/年高纯硫化氢等。

Potassium hydroxide; potassium chloride; sodium bicarbonate; ferrous sulphate; potassium bicarbonate; zinc sulphate; manganese sulphate; copper sulphate; potassium iodide.

氢氧化钾；氯化钾；碳酸氢钠；硫酸亚铁；碳酸氢钾；硫酸锌；硫酸锰；硫酸铜；碘化钾

The tolerance of seawater fish Japanese sea bass and black rockf ishto pH and alkalinity is studied through the experiment of acute toxicity. The median lethal concentration values are obtained by the method of probability unit. The safe concentrations of alkalinity, C032- and HC03- are obtained. The signification of pH and alkalinity is estimated with analysis of variance.

本文应用急性毒性试验方法研究了海水鱼类鲈鱼黑鲪对pH、碱度、二氧化碳体系各分量的耐受性，应用概率单位法求得半致死浓度，并得到了碱度、碳酸根、碳酸氢根等的安全浓度，应用方差分析评价了pH和碱度致毒作用的显著性，探讨了不同pH、碱度范围的主要致死因子。

Synthesis of dipropyl carbonatefrom dimethyl carbonateand propyl alcohol by transesterification was studied.

用丙醇和碳酸二甲酯液相酯交换合成碳酸二丙酯，筛选出催化性能和稳定性较好的KOH/Naβ固体碱催化剂，考察了KOH负载量对催化剂酯交换性能的影响。

Separation of Cadmium by Iodide-4-Aminoantipyrine-Propyl Alcohol Extraction System in the Presence of Ammonium Sulphate;2. Synthesis of dipropyl carbonatefrom dimethyl carbonateand propyl alcohol by transesterification was studied.

用丙醇和碳酸二甲酯液相酯交换合成碳酸二丙酯，筛选出催化性能和稳定性较好的KOH/Naβ固体碱催化剂，考察了KOH负载量对催化剂酯交换性能的影响。

For efficient utilization of phosphorus—rich rhodochrosite and complicated sulfides, we have carried out some studies on enrichment of manganese, dephosphorization and bio-catalytical oxidation of sulfides supported by NSFC (No. 59374150, 59774010), the main contents include: properties of Huayuan Manganese ore; microorganisms preparation of dealing with manganese ore; physiological and biochemical properties of microbes used; the mechanism of microbes function to manganese ore; the separation, tameness of Thiobacillus ferrooxidans and its nutriment; bio—catalytical oxidation mechanism of sulfides; extraction of gold by bio—catalytical oxidation—cyanidation.

为解决我国储量丰富的高磷贫碳酸锰矿石和复杂硫化矿有效利用中存在的问题，我们在国家自然科学基金委员会的资助下（No.59374150，No.59774010），以花垣锰矿石和黄铜矿、黄铁矿等为研究对象，进行了高磷贫碳酸锰矿石的微生物富锰降磷和生物催化氧化硫化矿等的研讨工作，内容包括：花垣锰矿石的性质研究；富锰降磷微生物的筛选；试验用微生物的生理生化特性及富锰降磷机理探讨；催化氧化硫化矿细菌的分离、驯化及营养条件确定；生物催化氧化硫化矿的机制；金的生物催化氧化—氰化提取。

Carbon acid is particularly familiar to us in the form of soda water.

汽水中就有碳酸。我们对碳酸的这种形式很熟悉。

Free tryptophane, docosoic acid and methyl 14-methy pentadecanate were isolated and identified as monomeric compounds also for the first time from Panax plants. Malonyl-ginsenoside 〓, ginsenoside Ro,〓, Re,〓,〓,〓(8 saponins) and stigmasterol were isolated and identified for the first time from the fruits and molonyl- ginsenoside 〓 was also the first from the plant of panax quinquefolium.

游离色氨酸、二十二碳酸及14-甲基-十五碳酸甲酯是首次从人参属植物中分离鉴定的杂环α-氨基酸和脂肪羧酸类单体化合物；丙二酸单酰基人参皂甙〓、人参皂甙〓及豆甾醇是西洋参果中首次分离鉴定的8种单体皂甙和1种甾醇化合物，M-〓亦为西洋参中首次分离鉴定的皂甙化合物。

Products available:strontium chloride,strontium nitrate,high purity strontium carbonate,strontium hydroxide,strENDS UNION ENTERPRISE LTD.

提供产品：氯化锶，硝酸锶，高纯碳酸锶，氢氧化锶，半水醋酸锶，高纯氯化钡，氢氧化钡，高纯碳酸钡，醋酸钡，氯化锰，硝酸锰，醋酸锰，碱式碳酸铅，硫磺。

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。