磷酸

Methods: The content of 7-ACA raw material was determined on C18chromatographic column by using disodium hydrogen phosphate reagent.

用磷酸氢二钠试剂，在C18色谱柱上测定7-氨基头孢菌烷酸原料的含量。

The method established in the present paper is simple, precise, fast and suitable for determination of 7 kinds of antibiotics, dexamethasone phosphate disodium salt and salicylic acid in anti-acne cosmetics.

该法操作简便、准确、快速，能够检测祛痘除螨类化妆品中7种抗生素以及地塞米松磷酸钠和水杨酸的含量。

Another method was studied for in-situ synthesizing sodium alginate grafted sodium acrylate in disodium hydrogen phosphate dodecahydrates' melt.

本论文提出了另一种方法，是在十二水磷酸氢二钠熔体中，原位合成海藻酸钠接枝丙烯酸钠共聚物作为增稠剂。

The agents consist of a CO2 generating source, usually sodium bicarbonate, and an acid constituent such as tartaric, citric or adipic acid or their sodium or calcium salts, disodium hydrogen phosphate or aluminum sulfate.

通常该发酵剂中含有产生CO2的物质，一般是碳酸氢钠或一种酸，如酒石酸、柠檬酸或脂肪酸或它们的钠盐或钙盐，磷酸二氢钠或硫酸铝。

WPA ; reaction ; crystallization ; food additive ; disodium hydrogen phosphate

本研究针对原料所含杂质、食品添加剂磷酸二氢钠得率问题以及生产

Then,in the bovine serum albumin buffer solution containing disodium hydrogen phosphate and citric acid,ferrite/polyacrylamide was added with crosslinker glutaraldehyde and then be enwrapped by BSA.

首先在反相微乳液体系中制备出Fe3O4/PAM磁性微球；然后在牛白蛋白的磷酸氢二钠-柠檬酸缓冲溶液中，以戊二醛为交联剂，加入Fe3O4/PAM微球，使蛋白质特异性吸附在微球上。

Disodium hydrogen phosphate dodecahydrates possesses the largest mass heat storage capacity among the low temperature phase change materials, which are classified as inorganic, organic and then: composites, yet it experiences phase segregation and super cooling when melting and hinders its application in latent heat storage system.

低温相变材料可分为无机、有机物及其复合物。十二水磷酸氢二钠(Na_2HPO_4·12H_2O)是其中质量储热密度最大的一种，但由于熔化时发生相分离，而妨碍了它的实际应用。

It is that:(1) the related compounds in Metronidazole Buccal Tablets prepared by Chongqing Medical College can be tested by determining (321nm) the total peak area of the impurities;(2) The related compounds in Metronidazole Disodium Phosphate for Injection prepared by Chongqing Medical College can be test by determining (254nm) the total peak area of the impurities and the peak area of the largest impurity;(3) Ceftriaxone polymer in Ceftriaxone Sodium for Injection prepared by Chongqing Keru Pharmacy Co.

结果如下：①用HPLC一UV法，在321nm处检测，用归一化法计算，控制各杂质峰面积的和，可检查重庆医科大学的注射用甲硝吟磷酸二钠中的有关物质：②用HPLC一UV法，在254nm处检测，控制杂质峰面积的和及控制最大杂质峰面积，可对重庆科瑞制药股份有限公司的注射用头饱曲松钠中的有关物质实施控制；③用HPLC一Uv法，在254nm处检测，按外标法计算，可检查注射用头抱曲松钠中的聚合物；④用紫外分光光度法，在277nm波长处测定吸收度，按C6H9N303的吸收系数为377计算每片标示百分含量，可测定重庆医科大学的甲硝哇口颊片的含量均匀度；⑤用紫外分光光度法，在277run波长处分别测定释放溶液20min、50min和90min的吸收度，按甲硝哇(C6H剥303)的吸收系数为377计算释放度，可检查重庆医科大学的甲硝哇口颊片的释放度。

When proceeding the research of drug identification by ultraviolet spectrophotometry, this paper adopts the approaches below: to identify Metronidazole Buccal Tablets and Potassium Sodium Dehydroandroan Drographolide Succinate by ulviolet maximum absorbent wavelength; to identify Metronidazole Disodium Phosphate for Injection by ulviolet maximum absorbent wavelength and minimum absorbent wavelength; to identify Ceftriaxone Sodium for Injection and Clarithromycin Tablets by retention time of high performance liquid chromatography- ultraviolet spectrophotometry.

通过测定紫外最大吸收波长λ_(max鉴别甲硝唑口颊片和炎琥宁、测定紫外最大吸收波长λ_(max和最小吸收波长λ_(min鉴别注射用甲硝唑磷酸二钠，结合高效液相色谱(high performance liquid chromatography-ultraviolet detector，HPLC-UV)中保留时间的测定鉴别注射用头孢曲松钠和克拉霉素片，本文建立了药物鉴别的紫外分光光度法。

Disodium hydrogen phosphate anhydrous.

二钠氢 磷酸无水的应该对的。

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。