酐

Good thermal stability, High mechanical strength.Used as catalyst or catalyst carrier in the manufacturing of the important industrial products, such as cyanuramide, benzene anhydride, maleic acid anhydride, butadiene rubber, acrylic nitrite, etc.

用途：本产品在三聚氰胺、苯酐、顺丁烯二酸酐、顺丁橡胶、丙烯腈等重要工业品生产中用作催化剂及催化剂载体，也广泛用于石化产品的精制脱除芳烃，也可用于有机气体、液体的选择性吸附分离及离子交换脱除水中多价有害元素等。

The growth inhibiting rate of T24 cell lines were detected by MTT methods, apoptosis of cells were detected by flow cytometry, the mechanism of apoptosis was analyzed by detecting the protein expression of Bcl-2, Bax, Caspase-9, Caspase-3 and cytoplastic protein Cytochrome C. 4 We injected live T24 cells into the subcutaneous space of nude mice and successfully built up the animal model of bladder carcinoma. The effect of CS-PAA-EPI polymer magnetic microspheres targeting chemotherapy was investigated by HE staining, TUNEL ,tumor weight and volume inhibition rate. Results: 1 TEM revealed that the CS-PAA polymer magnetic microspheres were regular spherical shape,the average diameter was 80nm in dry condition. By controlling the pH value of the medium,polymers had positive or negative zeta potential. VSM showed the CS-PAA polymer magnetic microspheres had superparamagnetic. The diameter of CS-PAA-EPI polymer magnetic microspheres were 200nm in solution by DLS examining,the embedding ratio was 20%,the EPI loading rate was 15%, which was higer than reported in other articles. 2 Raw eye observation found that the rat"s bladder of treatment group was brown color,which meaned the aggregation of iron particles, compared with the control group, iron stain found iron particles were assembled in rat"s bladder of the treatment group, the amount of iron particles in liver and spleen were less obviously.

研究结果：1合成的CS-PAA磁性聚合物微球呈球形，大小均一，TEM测定其干态下粒径为80nm左右，磁化曲线证实具有超顺磁性，具有一定的PH敏感性，固载表柔比星后，水溶液性状稳定，无沉淀物，DLS测定直径约200nm左右，测定载药率为15％，较文献报道高，包封率为20％。2肉眼观察试验组大鼠膀胱表面呈褐色，可见大量的Fe粒子聚集，普鲁士兰染色法显示，试验组大鼠膀胱壁内有大量的Fe粒子，分布至膀胱壁全层，与对照组大鼠相比，试验组大鼠的肝、脾内的Fe粒子聚集量明显降低；HPLC测定结果与Fe染色相同；高剂量磁性CS-PAA-EPI生理盐水组及单纯EPI生理盐水组均在给药后14天出现血肌酐和尿素氮的升高，其他组大鼠血生化指标没有明显变化。3MTT法发现，高、中、低剂量磁性CS-PAA-EPI生理盐水组在外加磁场的协同作用下杀伤T24细胞效应明显高于单纯的EPI生理盐水组，FCM发现试验药物组可引起明显的肿瘤细胞凋亡，试验药物治疗组细胞胞浆内出现了由线粒体释放出的细胞色素C，试验组细胞Bcl-2蛋白减少，Bax蛋白变化不明显，Caspase-3、Caspase-9蛋白受到了激活活化。4高、中、低剂量磁性CS-PAA-EPI生理盐水组的瘤重抑制率和瘤体积抑制率均明显高于单纯的EPI生理盐水组(P＜0.01)，其中高剂量组的抑制率最高。

The copolycondensation type polyamic acid was synthesized by using 3,3', 4,4'-Benzophenonetetracarboxylic dianhydride as the dianhydride monomer, 4,4'-Diamino diphenylmethane and 4,4'-Oxydianiline as the diamine monomer under microwave irradiation in Dimethylformamide.

在微波辐射条件下，采用3，3'，4，4'-二苯酮四羧酸二酐、4，4'-二氨基二苯甲烷和4，4'-二氨基二苯醚为单体，N，N'-二甲基甲酰胺为溶剂，低温合成一种共缩聚聚酰亚胺的前驱体聚酰胺酸，化学亚胺化脱水环化生成BTDA型共缩聚聚酰亚胺。

A catalyst for obtaining pyromellitic dianhyride by catalytic gaseous phase oxidation from durene are developmented.

开发了一种由均四甲苯空气气相氧化制均苯四甲酸二酐过程所需的催化剂，该催化剂活性组分为Ce-Mo-Ti-V。

Ruixing is the registered trademark of our company, and the major products include Pyromellitic Dianhydride, Pyromellitic Acid, mesitylene, Durene, Aluminum Chloride Anhydrous, fluoro paints, melamine, green chrome oxide and metal chromium.

公司产品注册商标为&瑞星&牌，主导产品为：均苯四甲酸二酐、均苯四甲酸、均三甲苯、均四甲苯、无水三氯化铝、氟碳涂料、三聚氰胺、氧化铬绿和金属铬。

The primary outcome was severe pregnancy-associated hypertension alone or severe or mild hypertension with elevated liver-enzyme levels, thrombocytopenia, elevated serum creatinine levels, eclamptic seizure, medically indicated preterm birth, fetal-growth restriction, or perinatal death.

主要转归是单纯的严重妊娠性高血压，或者有严重或轻度高血压伴肝酶水平升高、血小板减少、血清肌酐水平升高、子痫发作、有医学指征的早产、胎儿生长受限或围生期死亡。

Before the experiment and in the second,fourth week of the experiment,blood was taken from mice's epicanthic intravenous of each group to determine biochemistry index of SCr,BUN,blood potassium,blood sodium and radioimmunity index of PCⅢ,HA,LA.

在实验前及实验的第2、4周，分别从各组大鼠眼内眦静脉采血，测定血肌酐、血尿素氮、血钾、血钠等生化指标以及Ⅲ型前胶原、血清透明质酸、层粘连蛋白等放免指标，42d时从心脏直接采血复查上述各指标，而后处死动物取肾脏进行组织形态学及特殊染色检查。

The volume ratio of furaldehyde to acetic anhydride is 1∶2; the mole ratio of furaldehyde with anhydrous potassium carbonate is 1.00∶0.54. The best phase transfer catalyst is PEG1000, the mass ratio of PEG1000 with furaldehyde is 4.3%, the reaction time is 11 min, the reaction power of microwave is 260 W. The yield ofα-furanacrylicacid is up to 72.3% under these reaction conditions.

研究结果表明：在微波辐射功率为260 W、微波反应时间为11 min、以聚乙二醇1 000(PEG1000)为相转移催化剂，糠醛与乙酐的体积比为1∶2，糠醛与无水碳酸钾的量比为1.00∶0.55时，α-呋喃丙烯酸的产率为72.3%。

Above organs emerged different damage in crude middle and high dose and processed high dose after 3 months and serum indicators- creatinine, urea nitrogen manifestly were increased, the coefficients of liver, kidney and gaster manifestly were heightened.

连续给药3个月，生品的中、高剂量组和炮制品的大剂量组均出现了上述脏器程度不同的损伤，可见血清生化指标的肌酐、尿素氮明显升高，肝、肾、胃脏器系数明显增加。

The synthetic route of glycidyl nitrate was improved. Glycidol was synthesized by the cyclization process from allyl alcohol and m-CPBA, then glycidyl nitrate was synthesized with glycidol as raw materials and HNO3/ 2O as nitrating agent.

为了改进缩水甘油醚硝酸酯的合成路线，以丙烯醇为原料，经间氯过苯甲酸环氧化后得到缩水甘油醇，然后GA经硝酸／醋酐硝化后得到了GN，硝化产物GN的收率为70.2%，经过减压精馏后GN的纯度达到了98.9%。

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。