阳离子的

Germanotungtic acid catalyst can be used repeatedly. germanotungtic acid ; catalysis ; synthesis ; isoamyl salicyl

杂多酸及其盐是由杂多阴离子与反荷阳离子按确定比例组成的多核配合物，具有金属氧化物和

All the key equipments of polyester,film and yarns are imported from the U.S.A.,Germany, Japan,France and Italy, and so on.It yields different standards of Semidull,Cation Dyed of DTY,POY and FDY 400 thousand tons(Melt direct spinning 300 thousand tons and chip spinning 100 thousand tons are included).

所有聚酯、拉膜、纺丝、加弹等关键设备均从美国，德国，日本，法国，意大利等地引进，年产各种规格的涤纶半消光，阳离子，DTY，POY，FDY40万吨（其中熔体直纺30万吨，切片纺10万吨），产品畅销国内外。

A new type of flocculant named quaternary ammonium cationic sesbania gum was optimized from susbania gum series,and flocculation effects of QACSG and polyacrylamide for treating domestic wastewater were compared.

从田菁胶及其衍生物系列中优选出了一种新型高分子絮凝剂-季铵型阳离子田菁胶，并对QACSG和聚丙烯酰胺在处理生活污水中的絮凝效果作了系统比较。

ObjectiveTo study the process parameters of MDG separated from the seed of Stizolobium cochinchinensis by 732 cation exchange resin.

目的考察732型阳离子交换树脂分离猫豆中猫豆胍的工艺参数。

Micrometer-sized MoO2 hollow spheres were synthesized hydrothermally with ammonium heptamolybdate tetrahydrate as molybdenum source, Cetyltrimethylammonium bromide as structure-directing agent and C2H5OH as reducing agent, respectively.

在阳离子表面活性剂的作用下，以钼酸铵为钼源，乙醇作为还原剂合成了微米级MoO2空心球。

Two azobenzene-containing polyethers were synthesized and their thermotropic liquid crystalline properties were investigated.

氯乙基缩水甘油醚和GCE/羟丁基乙烯基醚分别通过阳离子聚合、光引发共聚合，获得两种聚醚，然后再分别与 4-硝基-4' -羟基偶氮苯反应，制备了两种侧链含偶氮苯生色团的液晶聚合物。

The results show that each cationic flocculant has optimal dosage range, generally from 50 mg/L to 80 mg/L. COD removal efficiency of the tested water can reach 78%or more, the transmittancy can reach 90%or more.

研究结果表明，各种阳离子絮凝剂量的最佳使用范围一般在50～80 mg/L，上清液COD去除率达到78%以上，透过率达到90%以上。

An anionic phenol-formaldehyde resin which synthesized by phenol, formaldehyde and diethylene triamine was studied in this paper, and this modified phenol-formaldehyde resin was used in papermaking as an intensifier.

结果表明，单独使用改性酚醛树脂时增强效果不显著；改性酚醛树脂和阳离子淀粉共同使用能有效提高纸张的抗张指数和环压指数。

It has shown that the tensile index and ring crush index of handsheets were increased by 15.90% and 9.65%, when phenol-formaldehyde resin modified by diethylene triamine was used in OCC pulp alone (the dosage of resin was 1.0%), and then adding cationic starch to pulp (the dosage of starch was 1.0%), the tensile index and ring crush index of handsheets were increased by 32.81% and 29.29%.

实验结果表明，二乙烯三胺改性的酚醛树脂单独作用于OCC废纸浆时(用量为1.0%)，抗张指数和环压指数分别增加了15.90%和9.65%，当加入阳离子淀粉时(用量为1.0%)，抗张指数和环压指数分别增加了32.81%和29.29%。

The chalice-shaped, trimeric receptor is knit together by subunit subunit contacts implicated in ion channel gating and receptor assembly.

这种三聚结构揭示了配体结合、阳离子进入和通道门控的一些分子基础。

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。