酐

This paper summarized preparation technology and the production application at home and abroad for acetic anhydride ,and suggestions of production and development for acetic anhydride in our country was put forward.

综述了醋酐的生产技术及国内外的生产应用状况，并对国内外醋酐的生产发展提出建议。

Translate methanol and carbon monoxide for acetic anhydride and acetic acid was important for chemical energy industrial of northern Shaanxi.

同时对加强醋酐的市场开拓、提高我国醋酐工业的整体水平有重大经济意义。

All patients were treated for 20 days.Before treatment and after treatment, 24 hour urine proteinuria,urine micro-albumin , urine IgG,urine α1-microglobulin,urine red blood cell number ,blood urea nitrogen,serum creatinine,endogenous creatinine clearance rate plasma rennin and angiotoninⅡconcentration were meatrued.

观察治疗前后血浆肾素、血管紧张素、24h尿蛋白定量、尿微量白蛋白、尿免疫球蛋白G、尿α1-微球蛋白(尿α1-M)、尿红细胞数、血尿素氮、血清肌酐及内生肌酐清除率Ccr等指标的变化。

All patientswere treated for 20 days. Before treatment and after treatment, 24 hour urineproteinuria, urine micro-albumin, urine IgG, urineα_1-microglobulin, urine redblood cell number ,blood urea nitrogen,serum creatinine,endogenouscreatinine clearance rate plasma rennin and angiotoninⅡconcentration weremeatrued.

观察治疗前后血浆肾素、血管紧张素、24h尿蛋白定量、尿微量白蛋白、尿免疫球蛋白G、尿α_1-微球蛋白(尿α_1-M)、尿红细胞数、血尿素氮、血清肌酐及内生肌酐清除率Ccr等指标的变化。

The production technology and market for maleic anhydride are reviewed, and some advice about development of China's maleic anhydride industry is put forward.

分析了顺酐生产技术进展及国内外市场，提出了我国顺酐发展的建议。

The outcome factor was recovery of renal function (serum creatinine ≤116 μmol/L) in azotemia patients or a 50% reduction of serum creatinine and discontinuation of dialysis in uremic patients,improved for at least three months.

结局因素：氮质血症者血肌酐下降至116 μmol/L以下，尿毒症者血肌酐下降50%以上，并脱离透析3个月以上为阳性结局，死亡者因其肾功能不可能再恢复，因此删失时间为28周。

The Cardo structure could increase the solubility and thermal stability of the resultant polyimide.

通过在聚酰亚胺的主链中引入庞大侧基（9，9-二苯基芴）形成轴状聚酰亚胺，同时提高聚酰亚胺的溶解性和热稳定性；庞大的侧基又能阻止链的堆砌，避免生色团荧光链间淬灭；通过加入第二种二酐单体合成三元缩聚型聚酰亚胺，调控荧光性二酐在聚酰亚胺中的含量，降低生色团在聚酰亚胺中的浓度，来避免生色团荧光浓度淬灭，增加聚酰亚胺的固态荧光量子效率；通过使用热稳定性好的稠环生色团苝和吖啶来避免共轭类生色团（如含双键或三键的生色团）在高温下热交联及氧和水的破坏。

After getting two systems'GLE, absorption experiment was operated in laboratorytype equipment and the operation condition of dibutyl sebacate as absorbent were studied, the relationship of 〓 and the content of maleic anhydride in gaseous mixtures, the temperature of gaseous mixture, the liquid and gases ratio, the temperature of absorbent and the content of maleic anhydride in absorbent were studied respectively.

在获得气液平衡关系后，在自行设计的小型实验设备上分别就癸二酸二丁酯吸收顺酐的操作条件：进塔气中顺酐含量的变化、进塔气体温度的变化、液气比的变化、进塔溶剂温度的变化和吸收剂中顺酐含量的变化等对吸收效率的影响进行了初步探讨，推荐了合适的操作条件。

The optimum reaction condition for preparation of CoPcY is as follows: a , using CoCl2 as the exchanged salt ; b , complexation temperature of 180 ; c . complexation catalyst of NH4C1 and A1C13 .2, The unsymmetrically substituted cobalt phthalocyanine complexes were synthesized by statistical condensation of phthalic anhydride and tetrabromophthalic anhydride, and further immobilized in MCM-41 molecular sieves by zeolite synthesis method, as well as characterized by XRD,FT-IR,DRS, 1HNMRetc. The catalytic property of CoPcBrx/MCM-41was tested by cyclohexane oxidation using H2O2 or t-BOOH as oxidant.

2采用本路线制备CoPcY的最佳条件为：a、采用氯化钴作为待交换的金属盐；b、络合温度以180℃为宜；c、起始反应物为苯酐、尿素、氯化铵、氯化铝、CoY时，制备出的CoPcY的催化性能最好； 2、首次采用苯酐和四溴苯酐均相浓缩统计合成法制得了不对称取代的金属钴酞菁络合物，并采用~1HNMR、FTIR、DRS等对其进行了结构表征；此外，采用沸石合成法将其固定于MCM-41中孔分子筛，并对其催化性能进行了考察。

Iminodiacetic acid and aspartic acid reacting with t-butyloxycarbonyl anhydride in the basic solvent system of 1,4-dioxane-water gave better yields than those from conventional t-BuOH/H 2O system method,while glutamic acid in both solvent systems of 1,4-dioxane-water and tetrahydrofuran-water also gave better yield.

其中Boc酐法反应条件温和，操作简便，试剂易得且经济，是实验室制备Boc保护的氨基酸的常用方法。常规Boc酐法多采用叔丁醇水和四氢呋喃水的溶剂体系。我们用常规Boc酐法制备Boc 亚氨基二乙酸时，多次重复，收率总是低于 5 0 %，对天冬氨酸和谷氨酸进行Boc化时也有类似情况。

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。