查询词典 zeta

The dissolubility of PPLA in water was (2.16～4.32)×10－2 mg·mL－1 according to eye judgment. The critical micelle concentration was 2.16×10－2 mg·mL－1 obtained from a fluorospectrophotometer. The self-assembled aggregates of PPLA in water were nanoscale spheres observed by a transmission electron microscope. The particle size and zeta potential tests by dynamic light scattering revealed that during preparation, the ratio of hydrophilicity/hydrophobicity, the aqueous medium and the pH had great influences; while dilution, freezing and pH change to basic condition had no effect after preparation, but pH change to acidic condition made the nanoparticles precipitate.

目测法得到其溶解度为(2.16～4.32)×10－2 mg·mL－1；荧光法得到聚合物的临界胶束浓度为1.12×10－3 mg·mL－1；透射电子显微镜观察显示该聚合物在水中的自组装聚集体为纳米级球形；动态激光光散射测试微球的粒径和Zeta电位发现，在微球的制备过程中，聚合物的亲/疏水性比例、水相介质及水溶液的pH值对它影响显著；而制备后，稀释和冷冻对它无显著影响，改变微球的环境pH值至酸性，出现聚集，至碱性无影响。

Regular oscillation of surface charge as detected by zeta potential demonstrated that the assembly proceeded surely in an LbL manner.

Zeta-电位分析揭示了壳聚糖和海藻酸钠在碳酸钙表面的层层增长。

It introduces partial fractions of meromorphic functions, product developments of entire functions, Hadamard's theorem, Riemann Zeta functions, Poisson-Jensen's formula; elliptic functions, including simply periodic functions and doubly periodic functions; algebraic functions and algebroid functions, Riemann surface, Nevanlinna theory, including characteristic functions, the first and second fundamental theorems, growth orders, etc; complex differential equations and complex functional equations, etc.

具体为：亚纯函数的部分分式、整函数的无穷乘积展开、Hadamard定理、Riemann Zeta函数、Poisson-Jensen公式；椭圆函数，包括单周期函数、双周期函数；代数函数和代数体函数、Riemann曲面简介；Nevanlinna理论简介，包括特征函数、第一和第二基本定理、增长级等；复微分方程和复函数方程，等等。在教学内容上充分体现基础性、新颖性。

The results showed the morphology of AMMN was mostly spherical and well-distributed, the mean diameter of the nanoparticles was 15 nm and the diameter ranged from 10~20 am and its Zeta potential was about +29.3 mV. These nanoparticles had tremendous durability in acid solution at pH 2.0 while the untreated particles are corroded in acid solution.

结果显示，精氨酸修饰的磁性纳米颗粒均匀，分散性好，大多呈圆球型，平均粒径为15 nm，粒径范围10~20 nm，其Zeta电位为＋29.3 mV；多层修饰的纳米磁粒在pH 2.0的酸中具有很好的耐酸性能，而未处理的纳米粒子在酸溶液中发生了溶解。

The Zeta potential and the surface charge density of the membrane were calculated according to Helmoltz-Schmolukovski and Gouy-Chapmann equations.

摘 要：研究芳香聚酰胺纳滤膜在不同电解质溶液中的流动电位，考察膜两侧压差、电解质浓度、离子价态及溶液pH值对流动电位的影响，用Helmoltz-Schmolukovski方程与Gouy-Chapmann方程计算膜表面的Zeta电位与电荷密度。

When the moon departs from the evening sky in a few more weeks, you should have no trouble seeing Zeta Tauri from a dark country sky.

数周之后，当月亮不在天空中出现时，你就可以毫不费劲的找到Zeta Tauri 。

The rather faint star Zeta Tauri pinpoints the tip of the Bull's southern horn, but the glary moon will make this star difficult if not impossible to see tonight.

光芒黯淡的Zeta Tauri 却能准确的指出位于南部天空的牛角尖，但是由于月亮强烈的光芒，今夜我们会很难找到这颗星星。

The OWC properties are measured with interfacial tensiometer,surface viscoelasticity tool and Zeta potential tool for the research on the influence of interfacial properties on stability of emulsion.

应用界面张力仪、表面粘弹性仪和Zeta电位仪测定了油水界面性质，研究了界面性质对乳状液稳定性的影响。

Using interfacial tensiometer, surface viscoelasticity meter and Zeta potentiometer to analyze the interface features of partially hydrolyzed polyacrylamide solution and simulated oil of crude oil in Daqing Oilfield, as well as the influences of solid particles on the interface.

采用界面张力仪、表面粘弹性仪和Zeta电位仪研究了部分水解聚丙烯酰胺溶液与大庆原油模拟油之间界面性质以及固体颗粒对这些界面性质的影响。

The dispersion behavior of ultrafine talc in aqueous system was investigated by the sedimentation test. The dispersion effects of cationic surfactant and some anionic surfactants with different hydrophilic ionogens were studied. By testing the changes of Zeta potential and the dispersion rate of the system with the addition of surfactant, the dispersion mechanism of dispersants was discussed.

采用沉降法考察了阳离子表面活性剂和几种亲水基不同的阴离子表面活性剂在水介质中对微细滑石颗粒的分散效果；通过测试加入表面活性剂前后颗粒表面Zeta电位、体系分散率变化，探讨了分散剂的作用机理。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。