磷酸盐

With the RoHS promulgated by European Union and the enhancement of human environmental pro- tection consciousness,leadless low-melting glasses is getting more and more attention.

概述了无铅低熔玻璃的国内外研究现状，对无铅硼酸盐，磷酸盐、钒酸盐玻璃等体系的组成以及物化性能进行了较为全面的介绍，并分析了无铅低熔玻璃今后发展的难点和趋势。

There is an oxidation process in two determination methods of total N and total P, so the samples＇liquation and oxidation processes can be done simultaneously, and the standard curve can be acquired simultaneously by confecting blended standard solution, which simplifies the determination process of total N and total P.

由于二者测定时都存在将含氮、含磷化合物转化为硝酸盐和下磷酸盐的氧化过程，因此本研究考虑将污泥样品消解和样品的氧化过程同时进行，标准曲线也可以通过配制混合标准溶液来同时测定，这使得总氮、总磷测定流程得以简化。

During the process of Yangtz River diluted water extending to northeast, the photosynthesis of phytoplankton was enhanced because of the suspended sediment settling, water temperature stratifying, and the luminousness increasing.

长江口及东海调查海域，考虑不同水系的影响，在高混浊度水体、S30的调查海域分别建立了表层海水pCO_2受温度、盐度、磷酸盐三因素影响的模型。

Fig. 2 provides an additional indication that the cultures that received less phosphate were limited by this macronutrient.

图 2 提供另外的指示收到了比较少的磷酸盐的文化被这 macronutrient 限制了。

Those with the agent containing phosphate, calcium carbonate, magnesium carbonate and other chemicals.

那些含有磷酸盐，碳酸钙，碳酸镁和其他化学品代理。

Other examples are Micaceous iron ore and phosphate pigments, which are used in rust protection, and magnetic pigments used in storage media.

其他的例子还有云母铁矿和磷酸盐颜料的防锈保护中使用，而在磁性存储介质使用的颜料。

Fig.2 Shape of KDP crystal grown by spontaneous nucleartion from a metaphosphate doped solution by rapid dropping of temperature

下面从溶液中多磷酸盐及KDP原料的存在状态及晶体结构作进一步的分析。

The results of differential thermal analysis on glasses show that the glass forming ability was improved greatly by introducing metaphosphate to AMCSBY glass.

对玻璃进行了差热分析，结果表明，在氟铝酸盐玻璃中引入偏磷酸盐使玻璃形成能力大大提高；测量了玻璃从紫外到红外的透过光谱和紫外吸收光谱，在玻璃中引入偏磷酸钡使玻璃中红外透过能力下降，红外吸收边带移向短波段，玻璃紫外透过能力得到提高。

Fig.1 Shape of KDP crystal grown on a Z-cut plate seed from a metaphosphate doped solution

由这些实验现象推测，多磷酸盐能够被晶体生长表面吸附并进入晶体内部，从而严重影响晶体的光学质量。

Sodium phosphate salts,which mainly include sodium orthophosphate,sodium pyrophosphate,sodium polyphosphate,and sodium metaphosphate,are the largest produced and consumed phosphate products in industrial phosphates.Their technical exploitation and market development are both relatively mature.

磷酸钠盐是工业磷酸盐中产量最大、消费量最多的磷化工产品，其技术开发与市场发展都比较成熟，主要有正磷酸钠盐、焦磷酸钠盐、聚磷酸钠盐和偏磷酸钠盐。

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。