酸酐

Coupling ML-PLLA/GA and glutamic acid capped ML-PLLA-GC were prepared by modifying with Glutaric anhydride and L-Glutamic acid, respectively.

借助IR、~1HNMR、UV、DSC、TG等分析手段对材料进行了表征，并考察了戊二酸酐和L-谷氨酸对甘露糖醇-聚乳酸性能的影响，实验结果表明：以。

Tert-Butyldimethylsilyloxy) glutaric anhydride, as an important drug intermediate, is synthesized from citric acid by decarboxylation, reduction, hydroxyl protection, esterolysis, cyclization, with the total yield of 30.3%.

介绍了以柠檬酸为起始原料合成3-戊二酸酐的方法。该路线经脱羧反应、加氢还原、羟基保护、酯水解和再闭环，以总收率为30.3%得到目的产物。

The first and second generation of dendritic polyesters have been prepared by divergent synthetic ways using trimethylopropame as core and o-phthalic anhydride, glycidol as branched units.

以三羟甲基丙烷为核，邻苯二甲酸酐，环氧丙醇为支化结构单元，合成了第一及第二代树枝状聚酯。

Two kinds of high alcohol acrylates were prepared by octadecyl alcohol and hexadecyl branched alcohol,respectively.The polymers of depressants were prepared by maleic anhydride-styrene-higher alcohol acrylates.By using these depressants,the pour points of the Liaohe crude oils were lowered form 30℃ to 20℃.

分别采用碳十八直链醇、碳十六支链醇与丙烯酸合成烷基酯，将烷基酯再与顺丁烯二酸酐、苯乙烯聚合制备的三元共聚物，对辽河油田的高凝原油的降凝效果进行了评价，实验发现这两种聚合物对凝固点为30℃原油都具有较好的效果，降幅可达10℃左右，但对凝固点为41℃的原油较差分别为3℃和6℃。

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。

Business company dispatch home was mixed first sets with suitable anhydride on July 8 hydric produce for raw material 1, 4- Ding Erchun (4 hydrogen of BDO)/ furan introduce device to finish function to assess, the mark is worn this technology realized success application in our country.

生意社7月8日讯国内首套以偏苯三酸酐和氢气为原料生产1，4-丁二醇/四氢呋喃的引进装置完成性能考核，标志着该技术在我国实现了成功应用。

Attachs most importance to a dot with circular economy, inferior group of nation chemical industry is accelerated implement project of 120 thousand tons of suitable anhydride, will deputy produce steam 1.3 million tons, besides for private use still will 600 thousand tons supply garden area other plant, but energy-saving mark coal 140 thousand tons; Project of 450 thousand tons of styrene deputy produce hydric 6000 tons, but section report 3.3 million kilowatt hour.

以循环经济为重点，亚邦化工集团加快实施12万吨偏苯三酸酐项目，将副产蒸汽130万吨，除了自用还将有60万吨供应园区其他工厂，可节能标煤14万吨；45万吨苯乙烯项目副产氢气6000吨，可节电330万千瓦时。

The invention relates to a synthesis method of N-acetylaminoglucose, which comprises dissolving D-glucosamine hydrochlorate and alcohol at the mass ratio of 2-2.5:100, adjusting the pH value of the solution to 9-10, filtering, taking the filter liquor, mixing and adding acetic anhydride at the 50-60wt% amount of D-glucosamine hydrochlorate, mixing and reacting for 2h, using absolute ethyl alcohol to recrystallizing, filtering and recrystallizing via water, to obtain rod-shape food grade N-acetylaminoglucose.

本发明涉及一种N-乙酰氨基葡萄糖的合成方法。该方法的具体步骤为：将D-葡萄糖胺盐酸盐和乙醇按2～2.5∶100的质量比溶于水中，调节该溶液的pH值为9～10；过滤，取滤液，搅拌下加入乙酸酐，其加入量为原料D-葡萄糖胺盐酸盐量的50～60wt％；搅拌反应2小时后，用无水乙醇进行重结晶；过滤，晶体再用水重结晶，得棒状食品级N-乙酰氨基葡萄糖。

It was about 10-20% children developed hypohidrosis after TPM treatment.

抑制碳酸酐酶，特别是其同工酶CA II和CA IV [9]；5。

Topiramate; Hypohidrosis; Oligohydrosis; Risk factor; Sweat gland; Carbonic anhydrase; Aquaporin

托吡酯；泌汗障碍；危险因素；汗腺；碳酸酐酶；水通道蛋白

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。