吡咯烷

The dispersion effect of sodium dodecyl benzyl sulfate was better than that of sodium dodecyl sulfate and polyvinyl pyrrolidone.

离子型表面活性剂十二烷基苯磺酸钠优于十二烷基硫酸钠和非离子型表面活性剂聚乙烯吡咯烷酮。

Compared to the polyvinyl pyrrolidone, the rice hull adsorbent has advantages of fast adsorption, stronger adsorbability for tannin and lower cost.

与聚乙烯聚吡咯烷酮比较，具有吸附速度快、吸附单宁更强及成本低廉的优点。

Hydrophilic monomers pyrrolidone and acrylamide were grafted on polyurethane film surface by UV irradiation to improve the surface lubricity.

用紫外光直接引发亲水性单体 N-乙烯吡咯烷酮、丙烯酰胺在医用聚氨酯表面进行接枝反应，可以提高 PU表面的润滑性。

The in vitro degradation of the crosslinked composites formed by unsaturated polyphosphoester N-vinyl pyrrolidone and β-tricalcium phosphate was investigated and the surface morphology of degradation sample was imaged by scanning electron microscopy.

研究了不饱和聚磷酸酯、N-乙烯基吡咯烷酮与β-磷酸钙交联复合体系的体外降解过程，并用扫描电镜观察了降解一定时间后试样表面的形貌结构。

Through measuring the solubility,stability and hydrolyzation property,the effect of additives on the characteristics of concentrated aqueous reactive blue P-3R was investigated. The results showed that among the four kinds of organic solvents,N-methyl pyrrolidone was the best one and its optimum dosage 10%. Na_ 2 HPO_ 4 /NaH_ 2 PO_ 4 was a better buffer and its optimum dosage was 3%.

通过对液态染料溶解性、稳定性、耐水解程度等的测试，综合考察了添加剂的种类及用量对高浓度液态活性艳蓝P-3R性能的影响，结果表明在所考察的四种有机共溶剂中，N-甲基吡咯烷酮的效果最好，且其最佳用量为10%；缓冲溶液中Na2HPO4/NaH2PO4的效果较好，最佳用量为3%。

Collagen-chitosan-polyvinyl pyrrolidone blend film s were prepared successfully by solution method,and characterized by FT-IR,X-ray diffraction and optical transmittance.

利用溶液共混法成功制备了新型生物膜材料——胶原蛋白—壳聚糖—聚乙烯吡咯烷酮共混膜，通过红外光谱、X-射线衍射和透光率测试表征了共混膜的结构，同时测定了共混膜的力学性能，考察了溶液pH值对共混膜吸水率的影响。

Fourth, surface pressure - mean molecule area curves of nervonic and polyvinyl pyrrolidone at different molar fraction (0～1.0) were measured and analyzed.

第四，研究神经酸和聚乙烯吡咯烷酮(PVP，polyvinyl pyrrolidone)混合单分子膜在神经酸的摩尔分数0～1.0的表面压-平均分子面积曲线。

The in vitro degradation of the crosslinked composites formed by unsaturated polyphosphoester、N-vinyl pyrrolidone and β-tricalcium phosphate was investigated and the surface morphology of dagradation sample was imaged by scanning electron microscopy.

研究了不饱和聚磷酸酯、N-乙烯基吡咯烷酮与β-磷酸钙交联复合体系的体外降解过程，并用扫描电镜观察了降解一定时间后试样表面的形貌结构。

The sheet-like α-Co2 composed of the uniform nanoparticles was successfully prepared using cobalt chloride as the raw material and polyvinyl pyrrolidone as the dispersant by chemical precipitation method.

以氯化钴为原料，聚乙烯吡咯烷酮为分散剂，采用化学沉淀的方法制备出由纳米粒子组成的片状α-Co2。

Compared with non-nanopolyaniline synthesized by conventional emulsion polymerization, nanopolyaniline has the narrow and uniform distribution of particle dimension and the diameter of particle is about 4-5nm,and the conductivity reaches 3.2S·cm-1, which is more than 100 times higher than that of nanopolyaniline;Moreover, it has higher solubility in conventional solvent and the solubility reaches 95% in N-methyl pyrrolidone;what's more ,it has higher crystallinity and more uniform crystal proved by XRD, apparent blue shift indicated by UV, which makes it possible to prepare transparent conductive composite films.

结果表明，微乳液法合成的纳米聚苯胺与常规乳液法合成的非纳米聚苯胺相比，具有明显的优越性：粒径分布窄，95%的在10nm 以下，最大的不超过30nm；电导率较高，达到了3.2S/cm，提高了2 个数量级以上；在有机溶剂中的溶解度较高，其中在N-甲基吡咯烷酮中的溶解率达到了95%；X 射线衍射仪分析表明，纳米聚苯胺结晶度高，晶型更为规整；紫外可见光谱研究发现，纳米聚苯胺在可见光区有明显的蓝移，为制备透明的导电复合膜提供了可能。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。