碳酸钙

Results show that Cu, Zn, Pb, and Rb were relatively enriched in the buried paleo-surface horizon (2A) and paleo-argillic horizon (2Bt), where natural pedogenic eluviation and illuviation was playing a main role. Under the relatively warm and moist climate, Sr leaching was strong, showing entirely contrary distribution characteristics with obvious loss in the horizons of 2A and 2Bt.

结果表明，受介质的吸附、碳酸钙等易淋溶组分的淋溶淀积、作物吸收等因素影响，痕量元素Cu、Zn、Pb、Rb在剖面上总体呈中高型分布，即在干润淋溶土表层（2A层）和黏质化B层（2Bt层）含量有所增加而表现为富集；而Sr则发生强烈迁移，在2A层、2Bt层含量显著降低。

Therefore,the pyrolysis temperature of shell having calcium carbonate is very high but the shell inappositely act as the stabilizer of polymer. This is instructing meaning to study additive and assistant of shell in the future.

因此，具有碳酸钙成分的贝壳虽然本身的热分解温度很高，但并不适合作为聚合物的热稳定剂，这对今后研究贝壳类添加剂或助剂有指导意义。

In the late 1990s Christopher Langdon, a marine biologist at the University of Miami, conducted an elegant experiment to test this surmise: he manipulated the water chemistry over an artificial coral reef that had been set up in a huge tank at Columbia University's Biosphere II laboratory (which, rather incongruously, is located in the middle of the Arizona desert).

令人惊讶的是，他发现即使海水对霰石还保持过饱和，珊瑚的碳酸钙产率却随 pH 值降低而下降。

Using high performance liquid chromatography, X-ray diffraction and Fourier transformation infrared spectra, the authors characterized the sorted proteins from different otoliths. It is found that the three types of proteins in lapillus and asteriscus have different characteristics, and such differences may be responsible for different kinds of crystalline state in calcium carbonate.

通过高效液相色谱、X射线衍射、红外光谱分析和氨基酸成分分析等方法分别对3种基质蛋白进行了表征，发现微耳石和星耳石中3种基质蛋白特征存在差异，并初步推断蛋白质特征的差别与碳酸钙晶体在微耳石和星耳石中的不同晶型有关。

Emulsifying calcium carbonate, lead, arsenic gong 0.5 PPM 880 yuan/ton, 5 tons, 8,000 yuan/ton.

乳化碳酸钙，铅砷贡小于0.5ppm，8800元/吨；5吨以上，8000元/吨。

This article introduces a new process for the preparation of dicalcium phosphate anhydrous, which includes dental grade, food grade and pharmaceutical grade, by reacting pure aqueous food grade phosphoric acid with both calcium carbonate and aqueous treated limewash.

介绍了一种以液态食品磷酸与碳酸钙及处理后的石灰水应生产无水磷酸氢钙工艺。

Apparatus CO2、Gas bottles、Calcium carbonate（CaCO3）、dilute hydrochloric acid、 Candles、Beaker、purple litmus solution、clear limewater, etc

制二氧化碳装置一套、集气瓶、碳酸钙、稀盐酸、小蜡烛两支、带梯形铁片的小烧杯、紫色石蕊试液、澄清石灰水等。

Can be used as paint filler, with fine, uniform, high brightness, and good optical properties, nano-calcium carbonate with steric effects of the paints to make this recipe in a larger density of suspended lithopone, since anti - sedimentation.

可作为颜料填充剂，具有细腻、均匀、白度高、光学性能好等优点，纳米碳酸钙具空间位阻效应，在制漆中，能使配方中密度较大的立德粉悬浮，起防沉降作用。

For the convenience of its customers and supporting the BA01-01 Titanium dioxide, rutile titanium dioxide, lithopone, calcium carbonate, carbon black pigment, N330 carbon black and red, yellow, green, blue, such as various models of paint is showing its advantages .

其为方便广大用户而配套的BA01-01钛白粉，金红石型钛白粉，立德粉，碳酸钙，色素碳黑，N330碳黑及红、黄、绿、蓝等各种型号颜料正在显示其优势。

At the same time imports of China-made high-quality business TiO2, talc (325-3000 Head), heavy calcium carbonate (325-3000 Head), lithopone, barium sulfate, calcined senior citizens soil, hydroxyethyl cellulose.

同时经营进口国产优质TiO2，滑石粉（325-3000目），重质碳酸钙（325-3000目），立德粉，硫酸钡，煅烧高龄土，羟乙基纤维素。

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。