查询词典 NA

The sizes of the self-assembly micelles of the amphiphilic block copolymers and the effects werestudied by dynamic light scattering and UV-visible spectrophotometer. The micelle sizes werelargely influenced bythe hydrophobic chain content in the copolymer, the properties of the solvent and the copolymer concentration in the organic phase. The morphology of the micelles was investigated by transmission electron microscopy. Theresults showed that the micelles appeared spheres with inner core and outer shell. The critical association concentrations were determined by pyrene monomer fluorescence probe technology. The degradability of copolymer was studied by the loss of the intrinsic viscosity in the degradation process. The results indicated that the degradation rate of PECL was slower thanthat of PELLA and PEDLLA. The stability of the copolymer micelle dispersion was examined by measuring the critical flocculation concentration, which gradually decreased with increasing the content of thehydrophobic chain in the copolymer. The rheological results showed thatthe viscosity ofthe micelle dispersion with higher content of PEG segments was firstly decreased and then increased with the increasingthe temperature. Otherwise, the variation of viscosity was irregular. The viscosity of the micelle dispersion increased with the increase of the electrolyte (Na 2SO 4) concentrations. Polymer micelles paclitaxel was prepared by self-emulsification/solvent evaporation method and solid dispersion technique with amphiphilic block polymers as the carrier material.

运用动态光散射和紫外分光光度计研究了两亲性嵌段共聚物自组装胶束的粒径及其影响因素，结果表明，自组装胶束的形成机理受制备方式的控制，胶束的粒径随着共聚物相对分子质量或疏水嵌段相对分子质量和有机相中共聚物浓度的增大而增大，随着有机溶剂的水溶性的增强而减小；采用透射电镜观察胶束的形态结构，发现胶束呈具有核壳结构的均匀球形；采用芘荧光探针法测两亲性嵌段共聚物的临界聚集浓度；通过降解过程中共聚物特性粘度的变化研究两亲性共聚物的降解性能，发现与PELLA和PEDLLA的相比，PECL 降解速率较慢；随着共聚物中疏水嵌段含量的增大，纳米分散液的稳定性逐渐下降；PEG含量高的PEDLLA纳米分散液随着温度的升高，纳米分散液的粘度先下降然后增大，反之，没有规律性，且随着电解质Na 2SO 4浓度的增大，体系粘度增大。

Secondly, in this thesis, we study text categorisation algorithms and implement an extensible text-classifier with supporting many algorithms including Rocchio's, Na?

其次，本文在研究了包括Rocchio's 算法、Na？

Its main ingredients are Cu, B, Mn , Fe, Zn, Mo; other ingredients include: Al, Mg, K, Ti, Ca, P, Si, Na, V, Co, Ni, Li, Se, Ge, W, Ba as well as acidulated substance water-soluble ions and organic microinching factors, which can totally meet the requirements of improving the quality and production of all kinds of plants.

主要成份： Cu 、B、Mn、Fe、Zn、Mo其它成份：Al、Mg、K、Ti、Ca、P、Si、Na、V、Co、Ni、Li、Se、Ge、W、Ba等及酸化物水溶性离子、有机微动因子，完全能满足各类植物提高质量和产量的要求。

Both Na-MMT and OMMT can be able to increase the softening point and viscosity of asphalts, but OMMT had a better modification effect.

Na-MMT和OMMT均可增大沥青的软化点和粘度，明显提高沥青的耐高温性能，但OMMT改善效果更为显著。

In a word, NaCl could inhibit the growth of C. roseus seedlings, and disrupt their ion balmier. To avoid the damage caused by NaCl stress, the seedlings would congregate excessive Na(superscript +) and Cl(superscript -) in their epidermal cells.

盐胁迫能够抑制长春花幼苗生长，打破其体内的离子平衡，但植物为降低盐胁迫的伤害而将过多的Na和Cl聚集于表皮细胞。

Mitochondria cristae and membrane in a great measure were anastomosis or vacuolization.Conclusion: All these results suggest that effects of H2S on papillary muscles are due to an increase in potassium efflux through opening the KATP channels at the early phase of ischemia, and acceleration in potassium reuptake through improving the Na+-K+-ATPase at the late phase of ischemia. Endogenous H2S may act as important regulator in electrophysiological characters in ischemic papillary muscles.

外源性H2S前处理可能通过兴奋KATP通道促进缺血早期K+外流，并且由于对Na+-K+-ATP酶的保护作用改善了缺血晚期对K+的重摄取，进而影响缺血环境下豚鼠乳头状肌细胞的电生理效应；乳头状肌细胞内源性产生的H2S可能在心肌缺血损伤时发挥着重要的电生理作用。

The optimal desalinating process based on the following condition: desalination was optimized at effluent pH 4.0, flow volume 4 BV/h. Under these conditions, the volume ratio of resin and effluent in which the concentration of Na+was less than 30mg/L was about 1:6,and the loss rate of malic acid was 18.94%.

最佳上柱条件为：pH4.0的果酸废液，体积流量选择为4 BV/h，Na+浓度低于30mg/L的料液与树脂体积比约为6：1，苹果酸损失率为18.94%。

The polyaluminum flocculates with different B values were prepared by addition NaOH solution to AlCl〓 solution on using different methods. The characteristics of solution chemistry and species distribution in the polyaluminum solutions were examined completely and deeply by the potentiometry,〓Al NMR, Ferron timed comlexation spectrophotometry, Na〓SO〓 precipitation and ultrafiltration method.

应用多种化学分析技术及现代分析仪器，如电位滴定、Ferron逐时络合比色、Na〓SO〓沉淀、超滤膜过滤、X-衍射、富里叶红外光谱、扫描电镜等对铝盐的水解聚合反应过程、形态分布及其结构特征进行了全面深入地分析研究。

Compared with K〓O, Na〓O has stronger fluxing and homogenizing effect.

Na〓O比K〓O具有更强的助熔和抑制分相作用。

The results showed that the functional response of adults of D.punctulatus to second instars of P.sinica was fitted to Holling Ⅱ-type equation and the equation was Na=0.964 9 N/(1+0.313N).

结果表明，食虫齿爪盲蝽对枸杞木虱的捕食功能反应符合HollingⅡ型反应，拟合的圆盘方程为Na=0.964 9N/(1+0.313N)。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。