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- weak polar solvent 弱极性溶剂
- Anionic polyelectrolytes can ionize in polar solvent, forming macromolecule chains with lots of anionic charge. 阴离子型聚电解质在极性溶剂中会发生电离,导致大分子链上带有大量的净负电荷。
- The multiphase copolycondensation of PMDA,BOPDPA and ODA was carried out in polar solvent. 以均酐 (PMDA)、双醚酐 (BOPDPA)和 4 ,4 -二氨基二苯醚 (ODA)为原料 ,在极性溶剂中进行多相共缩聚。
- This may be held by cystine bonds (disulfide bridges) and by weak polar and hydrophobic attractive foreces between atoms. 这可能是由胱氨酸键（二硫键）和具有弱极性的原子间的疏水亲和力控制。
- The paper studied a method of preparing noncovalent molecular imprinting polymer(MIP) in polar solvent. 本文对极性溶剂中非共价型分子烙印聚合物的制备条件进行了研究。
- The results show that high-efficient apolar and weak polar glass capillary columns can be coated only if this modified surface is treated with deactivation. 研究表明,只要对这种改性表面进行钝化处理,即可涂渍出高效弱极性和非极性毛细管柱。
- However when the solvent is isopropyl alcohol or non polar solvent the decomposition value of monocrotophos is about 5% in the same condition. 但用异丙醇或非极性溶剂作溶剂时,在相同的条件下,久效磷的分解率为5%25左右。
- For arginine,the yield was improved to nearly 80% by using weakly polar solvent such as DCM and simultaneously increasing the reaction time to 20 h in the method of acyl chloride. 在酰氯法中;对于精氨酸;选择弱极法溶剂如DCM;延长反应时间至20 h;连接效率接近80%25.
- Fluorobenzonitrile(4 FBN) was prepared by fluorination of 4 chlorobenzonitrile(4 CBN) with potassium fluoride using 1,3 dimethyl 2 imidazolidone (DMI) as a non polar solvent. 以4氯苯甲腈(4CBN)和无水氟化钾为原料,1,3二甲基2咪唑啉酮(DMI)为反应介质,经氟化反应合成了4氟苯甲腈(4FBN)。
- Nonpolar solvent with little dielectric constant has good effcet to the rate of the reaction,while larger polar solvent without H + also can increase the rate of the reaction. 可以知道对甲醇羰基化这一反应 ,在极性溶剂中 ,极性较大且为非质子型的溶剂能显著提高反应的速率 ;在非极性溶剂中 ,介电常数较小的溶剂能增加反应速率。
- Nonpolar solvent with little dielectric constant has good effcet to the rate of the reaction,while larger polar solvent without H+ also can increase the rate of the reaction. 可以知道对甲醇羰基化这一反应，在极性溶剂中，极性较大且为非质子型的溶剂能显著提高反应的速率；在非极性溶剂中，介电常数较小的溶剂能增加反应速率。
- Based on the research in the medium and strong polar glass capillary column, the coating on the barium sulfate micro crystal modified surface with apolar and weak polar liquid phase is investigated. 本文在中等极性和强极性玻璃毛细管柱研究的基础上,对弱极性和非极性固定液在硫酸钡微晶改性表面上的涂渍情况作了详细的研究。
- In the presence of ZnCl_2 , the gels can be formed by PAATEA in many strong polar solvent, for example, methanol, propylene carbonate, water, DMSO. PAATEA is not dissolved in non-polar solvent such as DME, DOL. 这种凝胶因子在ZnCl_2 的存在下,能够在甲醇、碳酸丙烯酯、水、二甲亚砜等强极性溶剂中形成凝胶,在乙二醇二甲醚等非极性溶剂中不溶解。
- Nonpolar solvent with little dielectric constant has good effect to the rate of the reaction, while larger polar solvent without H(superscript +) also can increase the rate of the reaction. 可以知道对甲醇羰基化这一反应，在极性溶剂中，极性较大且为非质子型的溶济能显著提高反应的速率；非极性溶剂中，介电常数较小的溶剂能增加反应速率。
- The spirit is willing but the flesh is weak. 心有余而力不足。
- Gauss-Newton method was used to estimate the values of electrochemical kinetics parameters by fitting the weak polarization curve of the corroding metal. 文中对用高斯-牛顿法拟合三参数和四参数极化曲线方程式求取电化学动力学参数提出了两种改进方法。
- The two systems of government are polar opposites. 这两种政体正好相反。
- Introduction: the product has a very high dilatability in the polarity solvent such as water base and alcoholic group. 介绍:产品在水基,醇基等极性溶剂中具有很高的膨胀性,增稠和悬浮稳定性。
- Results show that the PB aid is fits to the surface properties of HMX and changes moisture HMX in binder by itself weaker polar of PB aid,so it can improve the processingability. 结果认为:通过降低功能助剂自身极性,使之与HMX的表面性能相匹配,改善了HMX在粘合剂中的润湿性,从而改善药浆工艺性能;
- The super-molecular structures of the solute and the solvent molecules connected by hydrogen bonding have been constructed for four kinds of polar solvents. 在四种极性溶剂中，我们构造了包括氢键作用的超分子结构。
