查询词典 rare earth

The effects of external rare earth on growth and physiological of Chlorella ellipsoidea and Ceratophyllum demersum were studied. The results implicated that there were apparently negative linear interrelation between the concentrations of Sm, Y and the numbers of Chlorella ellipsoidea, which would best be described as polynomial interrelation at 2～40mg/L concentration range of Sm and 2～20 mg/L of Y. The LC〓 of Sm and Y was respectively 41. 36mg/L and 2. 57mg/L by statistics, which also indicated the toxicity of Y was greater than that of Sm.

外源稀土对小球藻及金鱼藻生长生理影响研究结果表明：(1)中稀土元素Sm和重稀土元素Y处理浓度与小球藻生长量之间存在明显的负线性相关关系；在稀土一定处理浓度范围（Sm为2～40mg/L，Y为2～20mg/L）内，小球藻生长量随培养时间的动态变化符合多项式相关关系；统计计算得Sm和Y对小球藻的半致死浓度LC〓分别为41.36mg/L和22.57mg/L，表明Y对小球藻的毒性大于Sm。

A novel solid complex of gelatin hydrolysate and cerous chloride was synthesized successfully,and the complex reaction between gelatin hydrolysate and rare earth cerium was verified by FT-IR.

以工业明胶为原料，选用优质的肽键断裂剂，通过优化设计实验方案，确定最佳的实验条件(温度、水解时间、pH值)，试制出合格的水解明胶。

Tracing the hydrolysate of spinach endogenous chlorophyllase by HPLC, it was found that the effect of rare earth on the chlorophyllase activity or the hydrolysis activity of chlorophyllase on La-pheophytin was not remarkable; but La-pheophytin could accelerate the oxidation degradation of chlorophyll in spinach.

此外，用HPLC跟踪菠菜中叶绿素酶水解活性的结果显示：稀土离子对叶绿素酶的水解活性的影响并不显著；同样叶绿素酶对镧叶绿素的酶水解活性也不明显，然而，镧叶绿素可以催化叶绿素氧化降解。

Results showed that the peanut seeds soaked with the suitable rare earth concentration, not only increased chlorophyll content and photosynthetic intensity, but also chlorophyll in leaf cell enhanced. The chloroplastid texture intact, and the amounts of basal granule lamella increased with tight arrangement, and improved the absorption and transformation of light and energy.

结果表明，适宜浓度稀土浸种花生不仅提高了叶绿素含量和光合强度，而且还促进了叶细胞叶绿体的生长发育，使叶绿体结构完整、排列整齐，基粒片层数增多，紧密度高，从而有利于光能的吸收和转化，提高荚果产量。

This paper presents the newest research results on rare earth element additives to chrome plating in chromic acid bath.

对稀土镀铬添加剂的最新研究成果进行了系统的介绍，并就目前应用情况，阐述了今后研究工作中需要进一步探讨的问题。

Synthesis and characterization of two new rare-earth complexes and their research for cleaving an activated phosphate diester BDNPP and DNA.

两种新稀土双核配合物的合成、表征及其对磷酸二酯键模型物和DNA的作用研究。

Determination of high-content Ammonia Chloride in the rare-earth wastewater where there is little suspended matter by conductometric and refractometric analysis is described.

阐述了折光率法与电导率法测定稀土废水中高浓度氯化铵的原理和方法。

5The distribution patterns of rare earth element compositions in the hydrothermal components are similar to that of pacific seawater. This infers the complex and significant interactions of hydrothermal fluid with surrounding seawater during its diffusing process. Dissolved trace metals in the hydrothermal fluid can be removed by settling terrigenous or biogenic particulates and precipitated quickly from the hydrothermal plume round the vent. On the other hand, hydrothermal particulates would also scavenge some elements from the seawater to coprecipitate into the sediments.

5岩芯沉积物中热液源组分携带的稀土元素组成具有类似海水的分布模式，反映了热液流体喷出海底后与其它物源物质之间的复杂的相互作用：一方面大量生物和陆源碎屑物质的快速沉积导致溶解态的热液源物质被快速清扫，无法向外扩散，快速堆积在热液喷口附近；另一方面，随热液羽状体向外扩散的颗粒态热液源物质也清扫海水中的元素共同进入沉积物。

METHODS:Using Coptis chinensis as plant material,the effect of the rare-earth elements Yb3+ and Eu3+ at various concentrations on the callus growth and the content of alkaloids were investigated.

以药用植物黄连为材料，研究不同浓度的稀土化合物对愈伤组织鲜重增加和生物碱含量的影响。

Keywords rare earth composite solid superacid;cyclohexyl acetate;catalytic synthesis;kinetic equation;activation energy

稀土复合固体超强酸；乙酸环己酯；催化合成；动力学方程；活化能

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。