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The dependence of the relative intensity of cationic molecule and fragmentation ion of an acetylated melezitose on the concentration of Na + or Li + in the matrix was studied by using fast atom bombardment source .

利用快原子轰击源研究了乙酰化松三糖的阳离子化分子和碎片离子的相对强度随底物中Na＋或Li＋浓度变化的趋势。

Methylol polyacrylamide was first formed by the reaction of PAm with F in basic medium, then the cationic polyacrylamide was formed by the further reaction of PAm·M with D.

合成反应通过两步进行，先使PAm与F反应，生成羟甲基化产物PAm·M，然后在酸性条件下使PAm·M与D反应，制得PAm·MG。

These results suggested that Tyr710 may influence the stability of the monocyclic C-10 cationic intermediate through the interaction with Trp390 and play a role in preserving the cyclase structure and the conformation of active site.

由这些实验结果，我们推测Tyr710可能透过与Trp390作用来影响单环C-10碳阳离子中间物的稳定性，并且在维持蛋白质的结构及活性区的形状上有所贡献。

The second electrolytic process is successful, which is for production of monopotassium phosphate, hydrogen and chlorine from potassium chloride and phosphoric acid by using a cationic permselective membrane cell.

利用阳离子交换膜电解氯化钾和磷酸生产磷酸二氢钾并副产氢气和氯气的工艺路线是成功的。

The therapy groups displayed significant improvements in neuromotor functions and survivals of neuron and oligodendrocyte compared with control groups. These results demonstrated the neuroprotect roles of GGF2, and cationic liposome-mediated GGF2 transgene therapy has potential possibility.

结果：1、大鼠LFP致伤后3—7天，GGF2 mRNA在海马CAl区、CA2区、CA3区、DG及皮层表达明显增加。2、阳离子脂质体介导GGF2转基因治疗可促进大鼠伤后行为学的恢复，可促进损伤区神经元及少突胶质细胞的存活。3、原核表达方法得到GGF2重组蛋白。

In this paper, SiO_2-based air-water interfacial films with nano structure are templated by cationic surfactant cetyl trimethyl ammonium bromide with tetraethyl orthosilicate as precursor.

本文以正硅酸乙酯为前驱体、以十六烷基三甲基溴化铵为模板，用自组装的方法在特殊的区位——空气—水界面上制备了SiO_2的无机纳米薄膜。

In acid pulp, the depressing abilities of reagents on diaspore are in the order of hydroxamic acid starch＞dialdehyde starch＞carboxymethyl starch＞cationic starch＞primary starch. In addition, hydroxamic acid starch and carboxymethyl starch can activate kaolinite without influence on the recoveries of pyrophyllite and illite, so the two reagents have great potential and prospect to be the depressant of diaspore and the activator of kaolinite in bauxite reverse flotation.(3) By oximation of the copolymer of acrylamide and methyl acrylate, hydroxamic acid polyacrylamide is synthesized.

3对丙烯酰胺和丙烯酸甲酯的共聚物肟化制得氧肟酸聚丙烯酰胺，将它同非离子聚丙烯酰胺、阴离子聚丙烯酰胺、阳离子聚丙烯酰胺和两性聚丙烯酰胺分别应用于四种矿物的单矿物浮选试验，结果显示，改性聚丙烯酰胺对一水硬铝石、高岭石和伊利石均具有活化作用，其中，药剂对高岭石的活化最强，使它的回收率在整个pH值范围达到80％左右，在一定pH条件下超过一水硬铝石的回收率，解决了高岭石难浮选的问题。

To obtain a flocculant which could effectively remove dyes from dyeing wastewater , the amphoteric polymer was prepared by copolymerization of acrylamide, acrylic acid, cationic monomer and dmethyldiallylammonium chloride or acryloyl oxyethyl trimethyl ammonium chloride.

为制备一种对染色废水有显著脱色效果的絮凝剂，采用溶液聚合法，将两种阳离子单体二甲基二烯丙基氯化铵和丙烯酰氧乙基三甲基氯化铵分别与丙烯酰胺，丙烯酸共聚，合成了两性聚合物。

By the inverse microemulsion polymerization,(NH4)2S2O8-Na2SO3 as initiators,with the polymerization systems of the liquid paraffine/Span80-Tween60/AM-H2O-NaAc or the liquid paraffine/Span80-Tween60/AM- DMDAAC-H2O-NaAc, non-ionic PAM and the cationic copolymer P have been synthesized respectively.

采用反相微乳液聚合法，(NH4)2S2O8-Na2SO3为引发剂，液体石蜡/Span80-Tween60/AM-H2O-NaAc和液体石蜡/ Span80-Tween60/AM-DMDAAC-H2O-NaAc为聚合体系，分别制备了PAM和P。

These kosmotropes may be divided into two groups which act somewhat differently:(1) polyhydroxy compounds fit in well with the hydrogen bonding arrangements, but stabilize any cluster 'flickering' via hydrogen bond rearrangement, as their hydroxyl groups are similarly separated to water-water separations, and (2) zwitterions where the balance between hydrophilicity, hydrophobicity, anionic and cationic characteristics ensures good solubility but only weak net interactions to surrounding water.

这些kosmotropes可分为两个群体行为稍有不同：(1)多羟基化合物符合了氢键安排但任何稳定集束'摇曳'经由氢键重排，由于其羟基同样隔开水水离职，(2)氨基酸的平衡，亲水性，疏水性，阴离子和阳离子特色ensures溶解性好，但只有弱相互作用网，对周围的水。

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。