二酸

Main products: Ifosfamide,Ifosfamide acylate,2-Deoxy-D-Glucose, Vecuronium Bromide Oteracil Potassium,Gimeracil,Cinildipine,, Ceftiofur Hcl,Ceftiofur Sodium,Buflomedil Hcl

主要产品有：异环磷酰胺、异环磷酰胺酰化物、2-脱氧-D-葡萄糖、维库溴铵、盐酸头孢噻呋、头孢噻呋钠、氧嗪酸钾、吉莫斯特、西尼地平、盐酸马尼地平、培美曲塞、培美曲塞酸、培美曲塞二钠、尼索地平、消旋卡多曲、雷尼酸锶、盐酸丁咯地尔、1-(3-三氟甲基苯基)哌嗪盐酸盐、4-溴-2-甲基苯甲酸。

Main products: Ifosfamide,Ifosfamide acylate,2-Deoxy-D-Glucose,Vecuronium Bromide, Ceftiofur Hcl,Ceftiofur Sodium,Buflomedil Hcl,Oteracil Potassium,Gimeracil,Cinildipine,Manidipine dihydrochloride,Pemetrexed intermediate,Pemetrexed acid,Pemetrexed Disodium, Nisoldipine, Racecadotril, Strontium Ranelate, 1-(3-Trifluoromethylphenyl)piperazine hydrochloride, 4-Bromo-2-methylbenzoic acid.

主要产品有：异环磷酰胺、异环磷酰胺酰化物、2-脱氧-D-葡萄糖、维库溴铵、盐酸头孢噻呋、头孢噻呋钠、氧嗪酸钾、吉莫斯特、西尼地平、盐酸马尼地平、培美曲塞、培美曲塞酸、培美曲塞二钠、尼索地平、消旋卡多曲、雷尼酸锶、盐酸丁咯地尔、1-(3-三氟甲基苯基)哌嗪盐酸盐、4-溴-2-甲基苯甲酸。

Main products: Ifosfamide,Ifosfamide acylate,2-Deoxy-D-Glucose,Vecuronium Bromide, Ceftiofur Hcl,Ceftiofur Sodium,Buflomedil Hcl,Oteracil Potassium,Gimeracil,Cinildipine

主要产品有：异环磷酰胺、异环磷酰胺酰化物、2-脱氧-D-葡萄糖、维库溴铵、头孢噻呋、头孢噻呋钠、氧嗪酸钾、吉莫斯特、西尼地平、马尼地平、培美曲塞、培美曲塞酸、培美曲塞二钠、尼索地平、消旋卡多曲、雷尼酸锶、盐酸丁咯地尔、1-(3-三氟甲基苯基)哌嗪、4-溴-2-甲基苯甲酸。

Main products: Ifosfamide,Ifosfamide acylate,2-Deoxy-D-Glucose,Vecuronium Bromide, Ceftiofur Hcl,Ceftiofur Sodium,Buflomedil Hcl,Oteracil Potassium,Gimeracil,Cinildipine, Manidipine dihydrochloride,Pemetrexed intermediate,Pemetrexed acid,Pemetrexed Disodium, Nisoldipine, Racecadotril, Strontium Ranelate, 1-(3-Trifluoromethylphenyl)piperazine hydrochloride, 4-Bromo-2-methylbenzoic acid.

主营业务：主要产品有：异环磷酰胺、异环磷酰胺酰化物、2-脱氧-D-葡萄糖、维库溴铵、盐酸头孢噻呋、头孢噻呋钠、氧嗪酸钾、吉莫斯特、西尼地平、盐酸马尼地平、培美曲塞、培美曲塞酸、培美曲塞二钠、尼索地平、消旋卡多曲、雷尼酸锶、盐酸丁咯地尔、1-(3-三氟甲基苯基)哌嗪盐酸盐、4-溴-2-甲基苯甲酸。

Combining the performance evaluation (activity, selectivity and stability) and the characterization of the catalysts (XRD, TPD, FTIR and the pore structure measure), it can be concluded that :(1)The activity of modified β is higher than MCM-22, but the selectivity of ethylbenzene is lower about 3% than that of MCM-22;(2)The mounts of diethylbenzene and the other by-products are higher 1.7 times and 1.5 times than these of MCM-22 respectively;(3)The catalytic performance of zeolite mixture is nearly equal to modified β, but the selectivity of ethylbenzene is higher about 0.5% than that of modified β;(4)The catalytic activity of zeolite is mainly correlated with the number of acid sites, strength and distribution, and the distribution of products is determined by the binding energy of ethylbenzene and the pore structure, while the stability of catalyst is affected by the amount of poly-ring aromatic alkylate and the pore structure.

以性能评价和特性表征（XRD、TPD、FTIR和孔结构测定）相结合的方式，对上述三种催化剂性能比较的结果表明：（1）改性的活性明显高于MCM-22，但乙苯选择性却低于MCM-22绝对差约3%；（2）改性(上二乙苯和其他副产物的生成量分别约为MCM-22上对应值的1.7和1.5倍左右；（3）混合型催化剂的性能与改性相仿，但乙苯选择性提高0.5%左右；（4）对乙苯合成，沸石催化剂的活性主要取决于其B酸中心数、酸强度及酸分布，产物分布则取决于催化剂表面的乙苯脱附能垒值和孔道结构，而稠环芳烃的生成量和催化剂孔道结构是影响催化剂稳定性的主要因素。

We perennially deal in PEG, MPEG, Ethyleneamines and the ramification of Ethyleneamines, NP,OP, AEO, specialty surfactants(2A1, CF-10), DOW CORNING antifoam, PE Homopolymer, HEC, latex compounds for the carpet and rug, etc.

我司常年经销产品：聚乙二醇及甲氧基聚乙二醇系列、乙烯胺系列及其衍生物、烷基酚聚氧乙烯醚、脂肪醇聚氧乙烯醚、二苯醚二磺酸盐（2A1）、X-405、CF-10等表面活性剂、道康宁消泡剂、羟乙基纤维素、地毯胶等。

TCCA,SDIC,calcium hypochlorite,citric acid,potassium sorbate,sorbic acid,sodium chlorate,polymeric polyol,sodium persulfate,ammonium persulfate,ascorbic acid,sodium benzoate,thiourea,thiourea dioxide,oxalic acid.

提供产品：三氯异氰尿酸，二氯异氰尿酸钠，漂粉精，柠檬酸，山梨酸钾，山梨酸，氯酸钠，聚合多元醇，过硫酸钠，过硫酸铵，维生素C，苯甲酸钠，硫脲，二氧化硫脲，草酸。

In this paper, 4-4-(trifluoromethoxy benzoyl cyclohexyl-3, 5-diaminobenzoate with a large branch chain, pyromellitic dianhydride and 4-(4-aminobenzyl) benzenamine were used to synthesize polyimides. The effect of monomer charge order on pretilt angle was investigated for the first time when PIs were used as LC alignment layer, and the effect of diamine mole ratio on pretilt angle was studied. The thermal stability of the pretilt angle was discussed.

文章用均苯四酸二酐、4，4'-二胺基二苯甲烷和具有较大支链的4-（4-苯甲酰基）环己基－3，5-二胺基苯甲酸酯等单体制备聚酰亚胺，首次研究了单体加料顺序对液晶预倾角的影响，同时也研究了二胺配比对液晶预倾角的影响问题，并探讨了预倾角的热稳定性等问题。

A series of modified polyurethane elastomer materials with different amino siloxane content were synthesized,which were based on polyoxypropylene glycol,aminoethyl aminopropyl poly,toluene diisocyanate and the curing agent dimethylsulfide toluylenediamine.

以聚氧化丙烯二醇或聚氧化丙烯三醇、氨乙基氨丙基聚二甲基硅氧烷、甲苯二异氰酸酯为原料在无溶剂条件下制备预聚体，利用二甲基硫甲苯二胺为固化剂合成一系列氨基硅油改性聚氨酯弹性体材料，并对材料的力学性能、耐热性、表面水接触角等性能进行了测试。

Itamin D from the skin and diet is metabolized in the lier to 25-hydroxyitamin D (Figure 1), which is used to determine a patient's itamin D status1,2,3,4; 25-hydroxyitamin D is metabolized in the kidneys by the enzyme 25-hydroxyitamin D-1-hydroxylase (CYP27B1) to its actie form, 1,25-dihydroxyitamin D.1,2,3,4 The renal production of 1,25-dihydroxyitamin D is tightly regulated by plasma parathyroid hormone leels and serum calcium and phosphorus leels.1,2,3,4 Fibroblast growth factor 23, secreted from the bone, causes the sodium–phosphate cotransporter to be internalized by the cells of the kidney and small intestine and also suppresses 1,25-dihydroxyitamin D synthesis.5 The efficiency of the absorption of renal calcium and of intestinal calcium and phosphorus is increased in the presence of 1,25-dihydroxyitamin D (Figure 1).2,3,6 It also induces the expression of the enzyme 25-hydroxyitamin D-24-hydroxylase (CYP24), which catabolizes both 25-hydroxyitamin D and 1,25-dihydroxyitamin D into biologically inactie, water-soluble calcitroic acid.2,3,4

从皮肤和食物来的维生素D在肝中代谢为25-羟基维生素D（图1），被用来决定病人体内维生素D情况的1，2，3，4；25-羟基维生素D在肾中被25-羟基维生素D1羟化酶（CYP27B1）转变为有活性的1，25-二羟基维生素D 。1，2，3，4由肾产生1，25-二羟基维生素D是被血浆甲状旁腺激素和血清钙，磷水平紧密调节。1，2，3，4由骨分泌的成纤维细胞生长因子23使钠磷协同转运蛋白被肾和小肠细胞内化及抑制1，25-二羟维生素D合成。5 在1，25-二羟基维生素D作用下肾和小肠吸收钙及磷的效率增高(图1)。2，3，6 它也包括25-羟四- 24 -羟化酶的表达(CYP24)，且将1，25二羟基维生素D和25羟基维生素D异化成无生物活性，水溶性的维生素D3-23羧酸。2，3，4

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。