查询词典 carbonate

The cultured south pearls- moisture content 0.66%; shell albuminoid 4.55%; calcium carbonate and microelement etc above 92.64%;the Pinctada martensl pearl-moisture content 0.66%; shell albuminoid 5.22%; calcium carbonate and microelement etc above 92.57%.

人工养殖南珠--水份0.66%；壳角硬蛋白4.55%；碳酸钙、微量元素等无机成份92.64%以上。马氏珠母贝的珍珠质层--水份0.66%；壳角硬蛋白5.22%；碳酸钙、微量元素等无机成份92.57%以上。

The smooth and uniform calcium carbonate whiskers with aspect ratio 30-60 were produced without any additive, and the special branch-like calcium carbonate crystal was also prepared surprisingly. Furthermore, the mechanism for the calcium carbonate whiskers growth was discussed.

在未添加任何添加剂的情况下，成功制得长径比约30～60、表面光滑、大小分布均匀的文石型晶须及形貌独特的树枝状晶体，并对晶须的形成机制进行了分析。

Calcium carbonate whiskers were synthesized by using industrial waste phosphogypsum as raw materials.Calcium carbonate crystal form was characterized by microscope and electron-scanning microscope,XRD and FTIR analysis was employed to investigate the morphology of calcium carbonate whiskers.

论文摘要以工业废弃磷石膏为原料制备碳酸钙晶须，利用显微镜和扫描电镜观察晶体形貌，晶须样品的晶型用X衍射和红外光谱进行了表征。

The smooth and uniform calcium carbonate whiskers with aspect ratio 30-60 were produced without any additive, and the special branch-like calcium carbonate crystal was also prepared surprisingly. Furthermore, the mechanism for the calcium carbonate whiskers growth was discussed.

在未添加任何添加剂的情况下，胜利制得长径比约30～60、表面光滑、大小分布均匀的文石型晶须及形貌独特的树枝状晶体，并对晶须的形成机制进行了分析。

Calcium carbonate whiskers were synthesized by using industrial waste phosphogypsum as raw materials.Calcium carbonate crystal form was characterized by microscope and electron-scanning microscope,XRD and FTIR analysis was employed to investigate the morphology of calcium carbonate whiskers.

论文摘要以废弃磷石膏为原料制备碳酸钙晶须，利用显微镜和扫描电镜观察晶体形貌，晶须样品的晶型用X衍射和红外光谱进行了表征。

The synthetic technologies of calcium carbonate whiskers are reviewed, most of which are carried out in the normal gravity environment by adding some kind of morphology-control additive or needle-like crystal seeds of calcium carbonate supplemented with certain phosphate so as to prompt the crystal of calcium carbonate whiskers to grow in a certain direction to the reaction system.

摘 要：晶须碳酸钙的合成技术备受关注，其中绝大多数方法是在常重力场中，通过向反应物系中添加某种晶形控制剂，或预先添加针状碳酸钙晶种，并辅以能够促使碳酸钙晶体沿单一方向生长的磷酸系助剂。

Latest researches in the catalysts for synthesis of carbamate by ammonolysis of dimethyl carbonate;2. Progress in the catalysts for synthesis of carbamates by ammonolysis of dimethyl carbonate;3.4,4′-Methylene diphenyl carbamatewas synthesized by ammonolysis of dimethyl carbonate, a substitute of phosgene, and 4,4′-diaminodiphenyl methane with anhydrous zinc acetate as catalyst.

用碳酸二甲酯代替光气，以4，4′-二氨基二苯基甲烷为原料，在无水醋酸锌催化剂的作用下，经胺解反应合成了4，4′-二苯甲烷二氨基甲酸甲酯；测定了MDC的熔点；采用傅里叶变换红外光谱和氢核磁共振对产品结构进行了表征；考察了反应温度、DMC用量、反应压力、反应时间、催化剂用量对MDC收率的影响。

According to the sequence model, the topography is expanse and flatness, there are relative shallow water, stable structure, flattened basement in intercontinental rifting basin, and the provenances changed gradually from terrigenous clasts to intra-basin carbonate. So, there are some corresponding characteristics in sequence genetic framework:① Sequence material components are carbonate rocks, and mixed sedimentary series of carbonate rocks and clastic rocks.

就层序模型来讲，陆内裂陷盆地地势宽缓，具有水体相对浅、构造稳定、基底平缓、物质来源由陆源碎屑逐渐向盆地内的碳酸盐转化，因此，其相应的层序成因格架具有如下主要特征：①在层序物质构成方面，主要由碳酸盐岩构成，其次是碳酸盐岩—碎屑岩的混合沉积岩系。

Stone contains different contents , for example, iron, carbonate, calcium carbonate and magnesium carbonate ,ect..

宝石含有不同成分，例如：铁，碳酸盐，碳酸钙，碳酸镁等。

In order to extend use of calcium carbonate, the samples were modified by hydrazine hydrate, triethanolamine and sodium stearate. Hydrazine hydrate was 0.08%～0.24% of calcium oxide, triethanolamine was 0.1%～0.3% of calcium oxide, sodium stearate was 5% of calcium carbonate,modification time was 40 minute. Calcium carbonate has better active exponent and white degree.

为进一步扩大纳米碳酸钙的应用范围，对纳米碳酸钙进行了增白活化的改性，改性剂水合肼、三乙醇胺的用量分别取CaO质量的0.08%～0.24%、0.1%～0.3%，硬脂酸钠的用量取CaCO3质量的5%，改性时间为40min，在此条件下可以制得高白度、高活性的碳酸钙样品。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。