碳酸钙

The results indicate that PESA has excellent inhibitive effects to the poor solubility scales such as barium sulfate, calcium sulfate, strontium sulfate and to the calcium carbonate scale is normal.

研究了PESA在油田用水中的阻垢效果，结果表明，PESA对常遇到的硫酸钡、硫酸锶、硫酸钙类难溶垢有着优异的阻垢效果，对碳酸钙也有较好效果。

A study was made on the dynamic process of the formation of calcium carbonate scale in circulating cooling water system as well as the effects of scale inhibiters on it, with the scale-inhibiting performance of several organic phosphonate scale inhibitors evaluated.

主要研究了循环冷却水系统碳酸钙垢形成的动力学过程及阻垢剂对它的影响，并对几种有机磷酸阻垢剂的阻垢性能进行了评价。

To select the inhibitor component used to produce solid inhibitor,7 types of phosphonate scale inhibitor s are evaluated,and HEDP is proved to be most effective and have a rather good properity of heat-stability.

为筛选制作这种固体块所需的材料，评价了7种膦酸盐防垢剂，发现羟基乙叉二瞵酸对碳酸钙垢具有较高的防止能力，且热稳定性好。

As a result of caicium pgment polyporous with high brightness and ink absorption of, so it is very good, so we can improve business card printing and membership card making suitable to their needs, even Matt handling coated paper is also very practical.

由于碳酸钙颜料具有高白度与多孔性，所以油墨吸收性非常好，如此可改善制卡和会员卡制作适性，即使是无光处理之涂布纸也非常实用。

Key words Poncirus trifoliatea ; callus tissue; CaCO3 stress; physiological and biochemical index

关键词枳壳；愈伤组织；碳酸钙(CaCO3)胁迫；生理生化指标

The results of the physiological and biochemical indexes in callus tissue of Poncirus trifoliata tested under calcium carbonate(CaCO3) stress indicated that except total iron content, the negative correlations among CaCO3 concentration and peroxidase activity, superoxide dismutase activity, catalase activity, active iron content, soluble protein content and callus growth were recorded.

提要测定碳酸钙(CaCO3)胁迫下枳壳愈伤组织的某些生理生化指标的结果表明：除全 Fe 含量外，CaCO3浓度与过氧化物酶活性、超氧化物歧化酶活性、过氧化氢酶活性、活性Fe含量、可溶性蛋白质含量、愈伤组织增重均呈显著或极显著负相关，与培养液pH值呈显著正相关；随着培养的进程， POD活性、活性Fe和可溶性蛋白质含量、愈伤组织增重呈降低趋势， SOD和CAT活性先升后降，含高浓度CaCO3的培养液 pH值仅在20日左右略有降低。

After adding nano-calcium carbonate ,the rubber's hardness changed little and it can prolongate curing time.

加入纳米碳酸钙会影响硫化时间，一般迟延硫化，并用炭黑越多，硫化越快。

The paper aimed at the burning spent gases and calcium carbonate nanoparticles can be successfully synthesized by wet-chemical segregative decarbonization technique, while another environmentally conscious materials- oxynitride ceramics Sialon etc.

本文以燃烧烟气为对象，采用湿式固碳分离技术合成纳米碳酸钙，处理后的氮气制备氧氮化物环境友好陶瓷，达到抑制碳排放和资源增效多重目的，为挑战该世界技术难题奠定了扎实的基础并提出展望。

Nano-calcium carbonate/polymer composite particles were prepared by soapless emulsion polymerization of methylmethacrylate and Butyl acrylate on the surface of nano-CaCO3 in nano-CaCO3 aqueous suspension.

经甲基丙烯酸甲酯和丙烯酸丁酯双单体聚合包及的纳米碳酸钙形成了核壳结构增韧复合微粒。

Reduction of surface tension and steric effect are the dominant mechanisms for keeping the system stable.

降低表面张力和空间位阻是保持纳米碳酸钙分散体系稳定的主要机理。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。