查询词典 si

Polysilicate aluminum chloride flocculants of various molar ratio of Al to Si are prepared. The influence of ingredient molar ratio, pH value of waste water and the adding amount of flocculant is investigated in treating simulant rolling emulsion.

制备了不同Al/Si摩尔比的聚硅氯化铝，实验考察了成分摩尔比、废水pH值、药剂投加量对除油效果的影响。

The species distribution and transformation characteristics of polysilicic acid in the presence of acetic acid were investigated by chemical Si-Mo assay analysis.

针对聚硅酸金属盐絮凝剂因硅酸聚合胶凝而失活的问题，依照Si-Mo比色法的原理，对乙酸存在时的聚硅酸形态及其转化规律进行研究。

The system is composed of polysilicic ions and polyaluminous ion s with the participation of polyaluminous ion s, the Si-O specific line which is inherent in the examination of infrared spectrum is gradually reducing and becoming a broad belt, the non-ion bond reactions between polysilicic ion and polyaluminous ion is proved by observasion with electron microscopy.

稳定胶体态的硫硅聚铝和氯硅聚铝是性能优良的絮凝剂，体系中含有聚硅离子和聚铝离子。红外光谱测试固有的Si—O特征峰随聚铝离子的引入逐渐衰减，变成较宽的带，聚硅离子与聚铝离子间存在着一种非离子性的健合作用，电镜摄像观察证实了这一结论

The effects of low temperature pretreatment and high temperature preculture on the anther culture of non-heading Chinese cabbage were studied, using hybrids '99H Qiu-25'×'99H Qiu-23' and 'Suzhouqing'×'SI' as material.

以不结球白菜杂种一代'99H秋-25'×'99H秋-23'和'苏州青'×'SI'为试材，研究了低温预处理和高温预培养对花药培养效果的影响。

First of all, three kinds of Si〓N〓 ceramics with different microstructure and mechanical behaviour were made by use of pressureless sintering.

首先，利用常压烧结，制备了三种显微结构不同、力学性能各异的Si〓N〓陶瓷。

Selecting three typical pseudobinary eutectic systems, Al-Mg〓Si, Al-Mg〓Ge and Ge-AlSb, as the basic modelling system, this paper studied the regularity of composition selection and growth ect.

本文以恒温度梯度热分析、金相分析、定向凝固及熔体X射线衍射分析为主要手段，以Al-Mg〓Si、Al-Mg〓Ge和Ge-AlSb三个伪二元共晶体系作为基本的模拟系，对A-BC〓型伪二元定向共晶复合体的成分选择与生长等规律作了较为系统的研究。

The author has analysed the thermodynamics of Al2O3-Si-Al system, the microstructure and the function of reactional products.

首先，通过对Al_2O_3—Si—Al系统原位合成Sialon 反应的热力学分析，证明了原位反应合成Sialon的可行性。

In this paper, the fabrication method and process of Ni-Cr-Ni-Si thin-film thermocouples are introduced reasonedly.

这样用Ni-Cr/Ni-Si丝作为冷端补偿导线时会产生较大的误差。

This is short for the French phrase responde si vous plait.

这是法语responde si vous plait的简写。

Type I is composed of rhyolitic rocks, which are characterized by higher Si and alkali contents and lower Al and Ti contents, Na2O/K2O1 and a weak negative Eu anomaly (δEu=0.65–0.95), enriched in Sr and Ba and poor in Rb. Types I and II probably formed in an extensional to postorogenic extensional environment, accompanied by compressional uplift.

提要：大兴安岭北段根河地区早白垩世火山杂岩按岩石及其地球化学特征，可划分为3类：第Ⅰ类为流纹质岩石，富Si，碱，低Al，Ti，Na2O/K2O1，具弱的负Eu异常(δEu=0.65～0.95)，富Sr，Ba，贫Rb；研究认为第Ⅰ，Ⅱ类岩石产于挤压隆升相伴的拉张至造山后伸展构造环境。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。