二钠的

Disodium 5'-guanylate heptahydrate (5'-GMPNa2) is an important food additive and medicine material, which belongs to the second-generation fresh reagents. 5'-GMPNa2 exists in two solid forms: amorphism and crystal.

5'-鸟苷酸二钠是一种重要的食品添加剂及医药用品，属于第二代鲜味剂。5'-鸟苷酸二钠以无定形体和晶体两种固体状态存在。

The pore size and porosity character could be controlled by adjustment of the component.

再以磷酸氢二钠和磷酸二氢钠合成浓度为0.2 mol/L的磷酸钠缓冲液，作为固化液。

In contrast, dimerization and trimerization of NaH2PO4 are predicted to be the predominant initial reactions for the silica supported NaH2PO4 catalyst.

但是在硅胶负载的磷酸二氢钠上，磷酸二氢钠的二聚和三聚是缩合反应初始阶段的主要反应。

In contrast,dimerization and trimerization of NaH_2PO_4 are predicated to be the predominant initial reactions for the silica supported NaH_2PO_4 catalyst.

但是在二氧化硅负载的磷酸二氢钠上，磷酸二氢钠的二聚和三聚是缩合反应初始阶段的主要反应。

Application fields of sodium hexametaphosphate was summarized.Production technologies,mainly include two-step sodium dihydrogen phosphate production process and one-step phosphorus pentoxide production process of sodium hexametaphosphate,as well as advantages and disadvantages of various methods were introduced in detail.

综述了六偏磷酸钠的应用领域，并详细介绍了六偏磷酸钠的制备方法以及各种方法的优缺点，主要有磷酸二氢钠两步法和五氧化二磷一步法。

The problem from sodium tripolyphosphate,4A zeolite,sodium metasilicate and phosphorous prohibition was summarized and the various performances and effect of δ-layered crystal disodium silicate as detergent were analyzed.

分析了现用助洗剂三聚磷酸钠、4A沸石、偏硅酸钠存在的问题及禁磷的重要性，重点论述了δ-层状结晶二硅酸钠用作助洗剂的各种性能及效果，认为δ-层状结晶二硅酸钠是一种良好的无磷助洗剂，它具有其他助洗剂所不具备的优良性能；对δ-层状结晶二硅酸钠的制备工艺作了简要介绍，并作了市场及在国内工业化生产的可性行分析。

The DSC results showed that calcium carbonate,sodium benzoate and terephthalic acid were the nucleating agents of polypropylene with high thermal stability of the nucleating effect,while the thermal stability of nucleating effect of pimelic acid,suberic acid,azelaic acid,and the two component nucleating agents suberic acid/calcium carbonate and azelaic acid/calcium carbonate were poor.

研究了碳酸钙、苯甲酸钠、对苯二甲酸和脂肪二元酸：庚二酸、辛二酸、壬二酸及其与碳酸钙组成的双组分成核剂对聚丙烯结晶成核效果的热稳定性。结果表明，高熔点物质碳酸钙、对苯二甲酸、苯甲酸钠的成核效果的热稳定性高，而脂肪二元酸的成核热稳定性低。庚二酸与碳酸钙组成的双组分成核剂的成核热稳定性高，但辛二酸、壬二酸与碳酸钙组成的双组分成核剂的成核热稳定性没有得到改善。

However, the quality of the copper film deposited by this method is poor. In order to resolve this problem, we study the influence of some additives on two different kinds of electroless copper plating which using sodium hypophosphite as reducing agent and sodium citrate as chelating agent, sodium citrate and ethylene diamine tetraacetic acid disodium salt (EDTA·2Na). Electrochemical methods were used to test the anodic and cathodal polarization processes which can explain the mechanism of the influence of additives.

然而该体系所得的铜膜质量较差，为此我们研究了以次磷酸钠为还原剂，分别以柠檬酸钠为单一络合剂，柠檬酸钠和乙二胺四乙酸二钠为双络合剂体系中，研究了几种添加剂对化学镀铜的影响，并通过电化学方法研究了各种添加剂对化学镀铜沉积电位的影响。

The powder of cement was composed of calcium carbonate, tricalcium phosphate and calcium phosphate dibasic.

再以磷酸氢二钠和磷酸二氢钠合成浓度为0.2 mol/L的磷酸钠缓冲液，作为固化液。

The surface action mechanism of sodium polydithio dipropyl sulfonate in acidic Cu plating bath indicates that the surface complex produced by adsorbed sodium polydithio dipropyl sulfonate and Cu + resists copper ions' electrodeposition.

酸性镀铜溶液中表面活性剂聚二硫二丙烷磺酸钠的表面作用机理表现为：吸附态的聚二硫二丙烷磺酸钠与Cu＋形成表面络合物阻化铜离子的电沉积。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。