硫酸盐

Usedas a measure Of the amount of metallo—organic ad-difivas presentin new oils.in used oils the determination may be affected by thepresence Of incombustible contaminants such as lead alkyls,dustand wear metals.

硫酸盐灰分被作为一种测定新油品中金属有机物添加剂数量的方法。在用过的油品中，这种测定方法的精确度会由于有不燃烧污染物(如：铅的烷基化物、灰尘以及金属磨屑)的存在而受到影响。

Through the influence of internal expansion stress ratio on the flexural strength, the prediction model of flexural strength is established at the decreased stage after concrete is corroded by the sulfate.

通过混凝土内部膨胀应力之比对混凝土抗折强度的影响，建立了混凝土硫酸盐腐蚀后的抗折强度预测模型。

This method has been applied to the determination of sulfite in waste water samples. The results are consistent with those obtained by iodometry.

该法用于废水中亚硫酸盐的测定，所得结果与碘量法测得的结果相符。

The composition of oxygen isotope is a good tool to trace the origin and formation environment of sulfate.

氧同位素组成是一个非常有效的示踪硫酸盐的起源和形成环境的工具。

The performance of potassium ammonium jarosite for zinc and indium ions adsorption in the sulfate system is investigated.

考察黄钾铵铁矾对硫酸盐体系中锌、铟的吸附性能。

NASA's principal investigator for the rover mission, Steve Squyres, and his colleagues report in the journal Science that the sedimentary rocks analyzed by Opportunity contain sulfate salts and a mineral called jarosite - harsh chemicals that are also found in briny water here on Earth.

此次漫游者任务的主要航天局调查员 Steve Squyres 和他的同伴在《科学日志》上发表道，"机遇号"分析的水成岩物质含有硫酸盐的成分以及一种叫做黄钾铁矾的矿物，这种化学物质具有很强刺激性，在地球的咸海水中也有这种物质。

The research based on mineral analyses and experiments show that in the sulphate system hydronic jarosite will precipitate when the concentratjon of Fe3+ and SO increases, and goethite will be formed by hydrolises, or goethite and hydrogoethite will be formed when the concentration of .

运用多种方法鉴定表明，在硫酸盐体系中，从高浓度Fe3+和SO溶液中形成的草黄铁矾在表生条件下可水解成外铁矿。

The effect of the addition of the crystal seed in the jarosite preciptation was investigated and the results showed that the crystal seed would accelerate the crystallizing rate of jarosite formation, which convert the reaction mechanism from the crystallization kinetic rate control into the chemical reaction kinetic control.

阐述了晶种加入对沉矾影响的过程机理，认为晶种的加入加快了沉矾反应的结晶速度，使反应由结晶的动力学控制过渡到化学反应动力学控制，足量晶种加入情形下沉矾过程的活化能为94.66KJ／mol，表明了氯化物体系铁矾沉淀较硫酸盐体系中更易进行。

The potassium ammonium jarosite with zinc and indium is obtained by Fe3+ ion removal from the iron,zinc and indium coexisted sulphate system by potassium ammonium jarosite process.

在铁、锌、铟共存的硫酸盐体系中采用黄钾铵铁矾法除铁，得到了含锌、铟的黄钾铵铁矾，通过TG/DTA和XRD对黄钾铵铁矾及其热分解产物进行表征。

The purpose of present work is to study the mechanism of sulphate karst and its influence factors by laboratory experiments.

本文采用室内实验模拟的方法，根据岩溶发育的影响因素，研究了硫酸盐岩的溶蚀机理。

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％。