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When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究结果表明：在pH=10，吸附时间为30 min和骨炭加入量为0.6 g/L，饮用水砷初始质量浓度为0.5 mg/L时其砷去除率可达95.2%；骨炭吸附砷的行为同时符合Langmuir和Freundlich等温吸附模型；其吸附机理可能是Ca—OH官能团结合HASO4阴离子，并产生砷酸氢钙和羟基磷灰石的共沉淀，另外还存在离子交换作用；吸附柱的饱和吸附容量为4.688 mg/g；出水砷浓度符合世界卫生组织规定饮水砷标准(0.01 mg/L)。

The concentration of fluoride, calcium and phosphate ions in artifical saliva was determined.

分析不同实验阶段各组标本硬度值与牙外环境中钙、磷、氟浓度的变化。

The working conditions of equipments, the mediums and their concentrations, and the interference of coexisting ions were investigated. The results showed that when the flame was shielded with oxygen enriched, the barium in lapis lazuli could be determined using calcium nitrate as releasing agent in 5% nitric acid. The obtained results were satisfied.

对仪器的工作条件、介质及其浓度、共存离子的干扰进行了探索，结果表明，在富氧屏蔽火焰条件下、体积分数为5%硝酸介质中，以硝酸钙作释放剂，测定天青石中的钡，可获得满意结果。

Laboratory experiments suggest that capillary rise and evaporation play an important part in determining the position of emplacement of ions in the soil profile: in nature, root-zone transpiration also plays a part in solute deposition/adsorption within the evapo-transpiration zone.

实验室的实验表明，毛细管上升和蒸发在决定进驻的离子在土壤剖面位置的一个重要组成部分：性质，根区蒸腾也起着溶质沉积在部分/吸附在土壤水分蒸发，蒸腾区。

The effect of inorganic ions on effects of high voltage electrostatic field on catalase was studied.

研究了KBr、磷酸缓冲液、NaCl 对高压静电场对过氧化氢酶作用的影响。

It is well known that metal ions play important roles in the catalysis of a large number of different enzymes.

金属离子是许多不同酶分子中不可缺少的重要组成部分，并在酶的结构和功能中发挥着重要的作用，特别是含锌离子的酶，由于遍布于六大类酶中的每一类而更加引人注目。

What Dr Ceder and Mr Kang have done is create electrodes that are made of two different materials, one of which is good at storing ions while the other is good at conducting them.

Dr Ceder和 Mr Kang所做的就是造出了使用完全不同的另外两种材料制成的电极，一个善于储存锂离子，另一个则善于传导锂离子。

All geothermal water samples show high concentration of F, Si, Sr and Fe.Concentration of Fe, Si, and Sr ions is mainly controlled by solubility of fluorite, quartz andchalcedony, and celestite, respectively.

其中，F离子浓度主要受控于萤石的溶解；硅含量主要受控于石英和玉髓矿物的溶解；锶离子浓度主要受控于天青石矿物的溶解。

An experiment was conducted on electric ions and the permeability of the cell membrane.

曾经有人做过一个重要的实验，研究负离子与细胞渗透能力之间的关系。

It is generally assumed that the pools of ions that exchange very slowly with the external medium are localized in the cell sap.

通常假定，与外界介质交换的离子库位于细胞液之中。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。