碳酸钠

A new technology process of sodium diacetate production with glacial acetic acid and sodium carbonate in one reactor.

研究了以冰醋酸和碳酸钠一步合成双乙酸钠的工艺和反应设备，使双乙酸钠生产工艺更为简单合理，经济易行，而且产率达 97%以

Trifluoromethyl-3-heptadfluoroisopropyl-2-perfluoropentene-4-(N',N'-dimethylamino propyl) imino was prepared by the reaction of hexafluoropropene timer with N,N-dimethyl propanediamine in the molar ratio 1:1.0 at room temperature for 8h, and the structures of VIII were identified by IR and NMR spectra.

以六氟丙烯三聚体与N，N-二甲基丙二胺为原料合成叔胺2-三氟甲基-3-七氟异丙基-2-全氟戊烯-4-(N'，N'-二甲胺丙基)亚胺，利用红外光谱和核磁共振确定其结构，并通过对合成条件的考察得其最佳合成条件：乙醚为溶剂，碳酸钠为缚酸剂，摩尔投料比为1：1.0，在室温下反应8小时。

Then sodium ethoxide was used as base,the nucleophilic substitution of 2-pyrrolidone with the intermediate provided nefiracetam.

以碳酸钠为缚酸剂，摩尔比为1︰1的2，6-二甲基苯胺与氯乙酰氯反应合成了中间体2-氯-N-(2，6-二甲基苯基)乙酰胺；在强碱乙醇钠作用下，2-吡咯烷酮再与2-氯-N-(2，6-二甲基苯基)乙酰胺经亲核取代合成了目标化合物奈非西坦。

A new aroma compound,furfuryl thiopropionate was synthesized using furfuryl thioalcohol and propionyl chloride as raw materials,with calcium oxide and sodium carbonate as acid-capturer.

以糠硫醇和丙酰氯为原料，用氧化钙和碳酸钠为复合缚酸剂，合成了香料硫代丙酸糠酯，并用IR、元素分析等进行了表征。

College of Veterinary Medicine, China Agricultural University, Beijing 100094, China Abstract: A method has been developed to determine residual stilbenes such as diethylstilbestrol, dienestrol and hexestrol in animal tissues using solid phase extraction and gas chromatography-mass spectrometry.

动物组织样品在碱性条件下用乙酸乙酯提取，经碳酸钠溶液液-液分配净化，再用硅胶柱固相萃取净化，洗脱液均分成两份后经氮气吹干，分别用双三甲基硅基三氟乙酰氨和七氟丁酸酐衍生，采用选择离子监测模式进行测定，外标法定量。

The content of ClO 2 in a stabilized chlorine dioxide solution, determined by iodometric method , always deviates to be higher if peroxo-hydrous sudium carbonate is excessive.

用碘量法测定稳定性二氧化氯溶液中的二氧化氯(ClO2 )含量时，当稳定剂中过氧水合碳酸钠过量时，测定结果会偏高。

Size-controlled hydrothermal synthesising of phase-pure rutile TiO2 nanorods were carried out by the hydrolysis of TiOSO4 solution prepared by low cost metatitanic acid and concentrated H2SO4, with polyatomic acids as modifiers.

采用偏钛酸和浓硫酸为原料制备TiOSO4溶液，采用碳酸钠水解，多元酸为表面修饰剂，进行了粒径可控的金红石型TiO2纳米棒的水热合成研究。

AM - NaAMPS - DEAM terpolymer was synthesized from acrylamide, Sodium - 2 - acrylamido - 2 - methylpropane sulfonate and N,N - diethylacrylamide by free radical initiation copolymerization in aqueous solution.

以丙烯酰胺，2－丙烯酰胺－2－甲基丙碳酸钠，N，N－二乙基丙烯酰胺为单体，通过在水溶液中自由基引发共聚合，合成出了AM－NaAMPS－DEAM三元共聚物。

Reaction of 9-bromofluorenewith diethyl malonate and sodium carbonate gives diethyl 2-(9-Fluorenyl)malonate.Aminolysis of diethyl 2-(9-Fluorenyl)malonate in ethylenediamine and propylene diamine give〓 and 〓, respectively.〓 and 〓 were synthesized by the reaction of 9-bromofluorene with oxalyl bisethylenediamine. Copper and nickel complexes of 〓 and 〓 were obtained by the reaction of 〓 and 〓 with copper and nickel salt, respectively, in aqueoussolution and extrusion of two hydrogen ions from the amide groups.

使9-溴芴与丙二酸二乙酯在无水碳酸钠存在下反应合成出2-(9-芴基)丙二酸二乙酯。2-(9-芴基)丙二酸二乙酯在乙二胺中胺解得到配体〓，2-(9-芴基)丙二酸二乙酯在1，2-丙二胺中胺解得到配体〓，使9-溴芴与草酰二乙二胺作用得到配体〓和〓与相应的金属盐作用分别得到它们的铜、镍配合物。

The removal effects of cpsaicin,sodium percarbonate,cupric sulfate and cupric glutamate on Alexandrium sp.

为了寻找新型有效的赤潮藻杀灭剂，对辣椒素、过碳酸钠、CuSO4、谷氨酸铜对亚历山大藻LC3的杀灭效果以及表面活性剂对谷氨酸铜杀藻的促进作用进行了研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。