磷灰石

At Pipeline, measurements of apatite fission-tracks and U ?

在管道，磷灰石裂变径测量，跟踪和

Objective:To observe the clinical effect of total hip arthroplasty with hydroxyapatited-coated implants on middle and young patients.

目的：观察羟基磷灰石涂层人工髋关节应用于中青年患者的临床效果。

The mineral inclusions mainly include rutile, zircon, apatite, biotite, spinel and so on.

其矿物包裹体有金红石、锆石、磷灰石、云母以及尖晶石等。

OBJECTIVE: To evaluate the biocompatibility between nHA/CS composite and rabbit bone marrow stem cell in vitro.

目的：观察纳米羟基磷灰石/壳聚糖复合材料与兔骨髓间充质干细胞的相容性。

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)。

OBJECTIVE: To observe the curative effects of self-solidifying hydroxyapatite/norvancomycin composite as pulp capping material and to make a comparison with calcium hydroxide.

目的：实验拟观察自凝羟基磷灰石/去甲万古霉素复合物作为盖髓材料的疗效，并与临床应用最广泛的盖髓剂氢氧化钙相比较。

OBJECTIVE: To investigate the biomechanical effect of PCHC on repairing cancellous bone defect.

目的：通过动物实验观察新型的骨修复材料多孔碳酸化羟基磷灰石水泥修复骨缺损的力学效果。

Objective To investigate the significance of pore configuration and it's effect on the dissolution of carbonated hydroxyapatite cement.

目的 探讨碳酸化羟基磷灰石骨水泥中多孔结构存在的意义及其对溶解性能的影响。

In the reaction of producing yellow chrome, the quantity of Pb(CH3COO)2 or Pb(NO3)2 should be 1.10-1.15 times of the theoretic value.

过量的的D可用廉价的磷灰石吸附去除，基本消除二次污染。

The experimental result shows that, when 200～400 g/t hydroxylapatite adsorbent is used and the stirring time is longer than 60 minutes at normal temperature, the mass density of Pb 2+ in chrome yellow wastewater is reduced to lower than 0.5 mg/L, which comes up to the standard of industrial drain water (1.0 mg/L).

羟基磷灰石吸附剂对铬黄废水中Pb2 +吸附的间歇实验结果表明：当每吨废水中吸附剂用量为 2 0 0～ 4 0 0g时，常温搅拌 6 0min后，在弱酸性或中性废水中，铅离子质量浓度由2 。74mg/L降至 0 。5mg/L以下，完全符合GB8978- 1996工业废水排放标准 1.0mg/L。

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。