硝酸

The authors emphasize the importance of market prediction and suggest the establishment of a professional institution for market research. The adjustment of product mix must be considered in a macroview to avoid the dilemma of small scale, multi - varieties and low economic benefit. Not to abondon a certain variety: single superphosphate plays an important role and nitrophosphate takes an unique advantage in its process. Careful support is needed to the new nitrophosphate facility in an old enterprise. Triple superphosphate is a good product where its market launching and further processing are to be enhanced.

指出做好需求预测工作的重要性，建议建立我国化肥需求预测研究的专门机构；产品结构的调整应从宏观角度考虑，避免重新陷入小而全、低效益的国境；对磷复肥品种不宜轻易否定某一品种，低浓度磷肥过磷酸钙仍将发挥很大作用，硝酸磷肥有它工艺上独特的优点，支持老企业新建硝酸磷肥装置应慎重、重过磷酸钙是高浓度水溶性磷肥，是个好品种，应加强市场开拓，尤其是二次加工的研究开发工作。

The preparation of ammonium uranyl gadolinium carbonate using (NH4)2CO3 solution from the mixed solution of UO2(NO3)2 and Gd(NO3)3 by means of co-precipitation was investigated.

本工作试验研究以碳酸铵溶液作沉淀剂从硝酸铀酰和硝酸钆的混合溶液中共沉淀AUGdC的方法。

The formation of nitric oxide from nitric acid and mercury is applied in a volumetric method of analysis for nitric acid or its salts.

硝酸与汞生成一氧化氮的反应已用于硝酸及其盐类的容量分析法中。

The influences of the partical size of witherite, the initial concentration of nitric acid, the stirring speed, the reaction time and temperature on the decomposition rate of witherite are discussed.

分别对毒重石粒度、硝酸初始浓度、搅拌强度、反应时间、反应温度对毒重石分解率的影响进行讨论，并研究了硝酸分解毒重石反应过程机理及宏观动力学。

Super-fine K-doped Li2ZrO3 powders were synthesized via the citric acid-ethylene glycol complexing, with the nitrates of lithium, zirconyl and potassium as the materials. Then, the precursor of K-doped Li2ZrO3 and the K-doped Li2ZrO3 powders were characterized by means of TG-DSC, XRD and SEM. Moreover, the thermal decomposition of the gel and the formation of the tetragonal crystalline form were analyzed.

采用柠檬酸－乙二醇络合法，以硝酸锂、硝酸氧锆、硝酸钾为原料制备了掺钾Li2ZrO3超细晶体粉末，采用TG-DSC、XRD、SEM等方法对掺钾Li2ZrO3的前驱体及掺钾Li2ZrO3晶体粉末进行了表征，分析了凝胶的热分解变化过程和四方晶形结构的形成过程。

K-doped Li2ZrO3 super fine powder has been synthesized by citric acid-ethylene glycol sol-gel method using the nitrates of lithium, zirconyl, potassium as starting materials. The precursor of K-doped Li2ZrO3 and the powder of K-doped Li2ZrO3 have also been characterized by TG-DSC、XRD、SEM measurements. The decomposition of the gel and the formation of the tetragonal crystalline form were analyzed.

采用柠檬酸-乙二醇络合法，以硝酸锂、硝酸氧锆、硝酸钾为原料制备了掺钾Li2ZrO3超细晶体粉末，采用TG-DSC、XRD、SEM等手段对掺钾Li2ZrO3的前驱体及掺钾Li2ZrO3晶体粉末进行了表征，分析了凝胶的热分解变化过程和四方晶形结构的形成过程。

These results indicated that the increasing of the nitrate reductase activity stimulated flower-bud to pass during physiological and moephological differentiation stage. The decreasing of nitrate reductase activity and the increasing of ammoniacal nitrogen content stimulated the plants to blossom.

表明硝酸还原酶活性在花芽生理分化期至形态分化期的升高有利于促进花芽的转化和形成；形态分化后期至初花期，硝酸还原酶活性的下降，氨态氮含量的上升有利于促进开花。

The suitable method to dissolve Antheraea pernyi silk fibroin fibers and the character of regenerated silk fibroin solution were investigated in this paper.

研究了柞蚕丝素纤维的溶解途径和再生丝素溶液的性质，指出硝酸钙和硫氰酸锂的浓溶液是柞蚕丝素纤维的良溶剂，再生柞蚕丝素的分子量为20kDa～102.4kDa，硝酸钙对丝素大分子的破坏程度比硫氰酸锂大。

The method is based on the catalytic effect of NO~-_2 on oxidation of bromophenol red by potassium bromate in H_3PO_4 mediun.

基于稀磷酸介质中亚硝酸根催化溴酸钾氧化溴酚红的褪色反应，建立测定痕量亚硝酸根的新方法。

The results showed that Ca2+-ATPase, K+,Na+-ATPase and Mg2+-ATPase activity was increased in rat liver, kidney and heart after recurrent intraperitoneal administration of low dose of cerous nitrate(1mg/kg),but no changes happened for these enzymes activity after high cerous nitrate administration(50mg/kg).

结果显示，连续腹腔注射低浓度硝酸铈后，大鼠肝脏、肾脏、心脏等组织中Ca2+-ATP酶，K+、Na+-ATP酶，Mg2+-ATP酶活性明显增强；而当注射高浓度硝酸铈时，酶活性均未发生明显变化。

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。