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With a soluble carbohydrate this appears as a ring if the the sulphuric acid is gently poured into form a layer below the aqueous solution.

Molish试验:生药水浸液,加a -萘酚试剂数滴,摇匀后沿管壁滴加浓硫酸,若有糖类成分与甙类存在,则在二液面交界处出现紫红色环。

He points to an Earth bug called the bombardier beetle that produces a boiling-hot spray that is 25 percent hydrogen peroxide as a defense weapon.

他表示一种称之为"轰炸员"的地球虫类,能分泌出一种滚烫的液滴作为自我保护的工具,这样的液滴中含有百分之25%的双氧水。

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.

液滴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滴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。

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滴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滴在至少每秒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。

When the sodium lauryl sulfate and p-octyl polyethylene glycol phenyl ether is used and its level in 3% and 6: 4 ratio, the polymerization process has the lowest coagulum and the highest monomer conversion. Higher reaction temperature and more level hydroxyl value lead to more coagulum, the latter also lead to larger particle size. The acid value has larger influence on viscosity and coagulum, there exist a best range. The emulsion particle size is larger for its hydrophilicity, most of its particles are connected together.

在含较高亲水单体的乳液聚合体系中,难以制得稳定的预乳化液,不能采用工业生产中常用的预乳化工艺,而只能采用混合单体直接滴加的方法;由于单体混合物的亲水亲油值较高,用阴离子型乳化剂十二烷基硫酸钠和非离子型乳化剂聚乙二醇辛基苯基醚混合,用量为单体总量的3%,且比例在6:4时,乳液聚合时具有最低的凝聚物含量和最高的单体转化率;乳液聚合反应温度升高,可以提高单体转化率,增加反应速度,但凝聚率相应提高;随着羟基单体含量的增加,聚合过程中凝聚率增加,聚合物乳胶粒平均直径增加;羧基单体有一个最佳的用量(2.6%),过高或过低凝聚率均提高;羧基含量对乳液的粘度有较大的影响,当羧基含量较低时,羧基含量增加,乳液粘度增加明显;含羟基乳液粒子由于含亲水基团较多,使得乳胶粒径增大,乳胶粒子大多数互相凝聚在一起,处于凝聚态。

Through simulating the cooling stage of a hanging water droplet and the temperature variation of cryogen droplets in cryogen spray, the model is validated by the reasonable agreement with the experimental measurements.

有关液滴初始参数对液滴蒸发冷却特性影响的研究结果表明,本模型可以为制冷剂喷雾冷却实际应用于激光治疗鲜红斑痣手术提供有效的分析方法。

The measurement method includes adopting two vertically superposed position sensors and one capacitive sensor to measure the time for the liquid drop to pass through, adopting a frequency counter to count frequency and adopting microprocessor to calculate the liquid drop volume.

其方法是采用两个垂直重叠的位置传感器和一个电容传感器,测量液滴下落经过的时间,并由频率记数器对频率记数,而由微处理器计算出液滴体积。

This change will result in size variation of the main droplet.

在改变流量的情形下,对液滴的最大影响的就是改变主液滴尺寸大小。

PartⅡFeasibility of vitrifying normospermic samples using droplets without cryoprotectans Objective Discuss the feasibility of droplets to vitrify normospermic samples without cryoprotectants. Methods Normal prepared sperm were frozen by conventional freezing protocol and non-cryoprotectant freezing in droplets respectively. Freezing in droplets means freezing sperm in every 10ul drop. After thawing, compared the two groups'sperm mobilities.

第二部分微滴法无保护剂玻璃化冷冻正常精子的可行性探讨目的探讨在不添加冷冻保护剂的情况下微滴法玻璃化冷冻正常精子的可行性方法收集16份正常精液标本,上游处理后分别进行慢速冷冻和微滴法冷冻,微滴法即用拉细巴氏管将标本形成10ul的液滴,直接投入液氮内冻存,复苏后镜检其活动率。

The thesis makes a wellbore pressure and temperature distribution allegiance calculation forecasting model which takes the seawater temperature field and coefficient of heat transmission into account based on the study of the related theories. And the thesis makes a research of the impact of Reynolds Number upon drag coefficient based on the classical Tunner Droplet Model, and makes the critical flow rate model of liquid lift for Ya 13-1 gas field from the perspective of security.

通过理论研究,建立了考虑海水温度场及传热系数的适用于崖13-1气田的井筒压力、温度分布耦合计算预测模型;从气井积液机理研究出发,建立了高低气液比携液临界流量的计算模型,在高气液比携液临界模型的推导中,以经典的Tunner液滴模型为基础,研究了雷诺数对曳力系数的影响,从安全考虑建立了适用于崖13-1气田的携液临界模型。

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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。

I'm running my simile to an extreme.

我比喻得过头了。