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The basic principle,advantage,disadvantage and the improvement for measuring liquid surface tension with different methods were described.The methods were capillary rise method,Wilhelmy plate method,pendent drop method,drop volume method,maximum bubble pressure method.The problems in the surface tension measurement of wide temperature and pressure range,the chos...

本文着重介绍了几种液体表面张力的测定方法(包括毛细管上升法、Wilhelmy盘法、悬法、体积法、最大气泡压力法),包括这几种方法的测定原理、优缺点及改进方法,特别指出了宽温度和压力范围的表面张力测定存在的问题,实验方法的选择及表面张力测定方法的发展趋势。

Free carboxyl group was determined by the wet chemical analysis method, acid-base titration, in this paper.

在几种测定方法—氢氧化钠直接定法、氢氧化钠反定法、醋酸钙法中,醋酸钙法较好。

The measurement of carboxyl end group content in PBT was discussed with an automatic potentiometric titrator.

采用全自动电位定仪测定PBT切片的端羧基含量,对称样量、溶剂的配比、定剂的浓度等进行了正交优化。

There are two kinds of division laws: the model of simultaneous division and tree-like division. To use this method on engine, the mathematics model of fuel atomization carrying charge is established.

荷电后分裂具有一定的规律,传统的数学模型可分为假设液分裂一次完成的数学模型和树状分裂数学模型,而考虑到发动机上的实际雾化情况,本文建立了燃油带电荷辅助雾化的数学模型。

Use one drop of cedarwood combined with 3 drops of pine.

用一柏木结合3松树。

If you'd like to experiment with this, mix three drops each of lavender and rosemary oil with two drops each of cedarwood and thyme oils.

如果您想尝试这一点,每个组合三薰衣草和迷迭香油两每个柏木和百里香油。

NVB were used 25 mg per centiare on days 1 and days 8; DDP were used 30 mg per centiare on days 1 to days 3. A Period includes 28 days.

采用国产长春瑞滨25 mg/平方公尺,第1、8天静;顺铂 30 mg/平方公尺第1~3天静,28d为一个周期。

An aerosol spray device which is capable of imparting a unipolar charge by double layer charging and charge separation to liquid droplets of a composition sprayed therefrom has a spraying head in the form of an insert in an actuator, the spraying head having a bore through which liquid is expelled having an outlet, preferably with a tortuous periphery, having an L/a ratio of at least 8 (preferably at least 10) where L is the length of the periphery defining the bore outlet in mm and a is the cross-sectional area of the bore outlet in mm2 and the apparatus being constructed such that the droplets are expelled from the spraying head at a flow ratio of at least 0.4 (preferably at least 0.5) grams per second and have a charge to mass ratio of at least +/-1x10-4 C/kg.

本发明还提供了一种喷射装置,它能够通过双层充电和电荷分离而向要喷出的组合物液施加单一极性的电荷,该喷射装置具有一个喷头,该喷头制成为致动器中的插入件的形式,喷头具有一个孔腔,液体能够通过该孔腔从装置中排出,该孔腔具有一出口,该出口最好具有曲线周边,并且L/a比率至少为8,其中L是以mm为单位的确定孔腔出口的周长,a是以mm2为单位的孔腔出口的横截面积,该装置构造成使得液在至少每秒0.5克的流动速率以及具有至少+/-1×100C/kg的电荷/质量比的状态下从喷头排出。

In the eutrophic waters the liters of Chlorella virus are higher than those in the waters which are lack of organisms.

其中富营养化的水体中小球藻病毒度普遍较高,而在山泉等含有机质较少的水体中病毒度较低。

But the intensity is much weaker than positive control with deoxysodium cholate. Conclusion Ditong nasitis drop had no remarkable effect on injuring the function of frog mucosa cilia.

通鼻炎水在整体实验和离体实验中对蛙黏膜纤毛的功能无明显影响,但通鼻炎水浸润30 min后对黏膜纤毛运动有抑制作用。

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推荐网络例句

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了

The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.

世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。