表面

A hydrophilic positively charged nanofiltration membrane was prepared by UV irradiation graft polymerization of diallydimethyl ammonium chloride onto the surface of ultrafiltration membranes made of polyetherketone cardo.

通过在酚酞基聚芳醚酮超滤膜表面紫外辐照接枝亲水性单体二烯丙基二甲基氯化铵制备了一种表面荷正电的纳滤膜。

Surface compositions were studied by X-ray diffraction analysis. Ca/Na of carnallite components were determined by X-ray photoelectron spectroscopy.

运用X射线衍射法分析了不同粒径的光卤石矿表面的化学组成，运用光电子能谱法分析了其表面Na/Ca的摩尔比，用扫描电镜及能谱分析直接分析了各种晶体存在的形态。

Surface hydrophobicity of silk fibroin solution was lower than that of caseinate,while obviously increased by shearing treatment.Fibroin was applied for microencapsulation.

丝素的表面疏水性低于酪蛋白酸钠，经高速剪切作用后，表面疏水性显著增加。

Therefore,the complicated problem is simplified into asolving procedure of a group of infinite dimensional algebra equations.In thefact,not only is a general solution of the problem obtained,but also a method tocompute the dynamic thermal stress distribution at the surface of the cavity afterthe definition of the coefficient of the dynamic thermal stress distribution isgiven.

事实上，不但得到了单连通区域或复连通区域型二维孔洞表面的动态热应力分布问题的一个一般的解析解，而且，在定义了非耦合和耦合无量纲化动态热应力分布系数后，推导出计算单连通区域或复连通区域型二维孔洞表面的动态热应力分布的方法。

Bone morphogenetic protein -2 induces the expression of cementum attachment protein in human periodontal ligament clones ［J］.

本研究通过比较骨髓基质细胞与正常人牙周韧带细胞表面抗原的表达情况，证实牙周韧带细胞与骨髓基质细胞在表面抗原的表达上相似。

The preparation process includes the following steps: dissolving activator and RE oxide in the molar ratio of 0.01-0.02 in concentrated nitric acid and heating to dry, dissolving the obtain RE nitrate in deionized water to obtain solution of RE nitrate; dissolving soluble tungstate and surfactant in deionized water to obtain tungstate solution; mixing the RE nitrate solution and the tungstate solution through stirring to reaction for 25-60 min to obtain white precipitate; hydrothermal reaction of the precipitate in a reaction kettle at 100-260 deg.c for 24-72 hr; centrifugally separating, washing and drying to obtain the product.

浓硝酸的加入量保证稀土氧化物溶解就可以，过量的硝酸可以加热除去；将可溶性钨酸盐和表面活性剂溶解于去离子水中，得到钨酸盐溶液，表面活剂性的加入量为反应原料重量的0-30wt％；将稀土硝酸盐溶液加入到钨酸盐溶液中搅拌，发生沉淀反应，磁力搅拌时间为25-60分钟，得到白色沉淀；将含有沉淀物的溶液作为前驱物加入到反应釜中，发生水热反应，反应温度为100-260℃，反应时间为24～72小时；离心分离，洗涤，干燥，即得所需产物。

The con- cept of surface model and its digitized description in the new generation GPS are presented in this paper.

本文介绍了新一代GPS标准体系表面模型的概念及其数字化描述方法，探讨了基于新一代GPS的表面模型的操作技术。

EXPERIMENTAL STUDY ON THE INFLUENCE OF PROCESSING ON THE MECHANICAL PROPERTIES OF ENGINEERING CERAMICS Fan Ning Ai Xing Deng Jianxing Wang Yixing (Shandong University of Technology) Abrstract The mechanical properties of engineering ceramic are impacted by itself and its surface status.

加工方法对工程陶瓷力的影响摘要工程陶瓷的力学性能受材料本体和表面状况的共同影响。加工方法对材料的表面状况有较大的影响，因此，陶瓷材料的力学性能也受加工方法的影响深圳陶瓷加工工业陶瓷加工

The results showed that adding a small amount of ceria improved the dispersion of cobalt, decreased the electron density of the cobalt particle, and enhanced the dissociation of CO on the catalyst surface.

表征结果表明，少量CeO2助剂的添加提高了活性组分Co在催化剂表面的分散度，降低了催化剂表面Co的晶粒度，使催化剂对CO和H2的吸附性能发生了改变。

However, the simulation could not be carried out successfully if the concentration of Cerium and Neodymium is high.

其次，在模型Ⅰ的基础上，对铈和钕在黄土表面的吸附进行了表面络合模型研究。

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。