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- 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。
- The result demonstrats that isomerization occur in cis and trans of DES and its derivatives,which is effected obviously by polar solvents. 结果表明:在极性溶剂中,己烯雌酚和其衍生物存在着顺反异构转化现象,极性有机溶剂的溶剂化作用促使顺反异构体的转化。
- Samples may be dissolved or suspended in a range of polar solvents (but not acetone or methanol, since they are reaction products). 试样可以溶解或者悬浮分散在极性溶剂中(但不是丙酮或者甲醇，因为它们会发生反应)。
- 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 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。
- Because ultrafine TiO_2 is strong polarity material, the nano-scale TiO_2 can not be dispersed in non-polarity solvent well and is easy to agglomerate in the polarity solvent. 同时,由于纳米TiO_2具有强极性,使得TiO_2不易在非极性介质中分散,在极性介质中易于团聚,直接影响二氧化钛本身优异性能的发挥。
- Most separations are based upon partition mechanisms utilizing chemically modified silica as the stationary phase and polar solvents as the mobile phase. 绝大多数分离是基于分配的机理，使用化学修饰的硅胶为固定相，溶剂为移动相。
- 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。
- As regard to the peptide of high hydrophobicity, the less polar solvents could improve its recovery rate when used as eluents after the trifluoroacetic acid treatments. 而对于疏水性较强的多肽来说，在三氟乙酸洗脱后换用极性较弱的溶剂进行洗脱更有利于提高合成多肽的总收率。
- 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。
- It is believed that a small polarity of the CNF surface leads to its higher wettability in a non-polar solvent such as cyclohexane than in polar solvent such as water. 不同的表面改性手段可对CNF的表面性质进行调变以控制其在不同溶剂中的润湿行为。
- Two-step extraction with polar solvents and nonpolar solvents was an effective comprehensive extraction for antioxidant and essential oil of rosemary(Rosmarinus officinalis L. 极性溶剂和非极性溶剂的两步提取法是迷迭香抗氧化剂和精油综合提取的有效方法,操作简单,容易实施。
- 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。
- The two systems of government are polar opposites. 这两种政体正好相反。
- 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。
