Nitrate

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硝酸盐的大平反

Through three stories about nitrates, a storytelling technique is used to describe the main uses of nitrates today, including agricultural fertilizers, industrial explosives, and food preservatives. Nowadays, nitrate is suspected to be the main cause of carcinogenesis, but one coin has two sides; in fact, nitrates play an important role both in the ecological environment and in the human body. Therefore, the public can understand more about the applications of nitrates from this article. Through the accidental discovery of a rural couple in a wartime setting, this article describes the uses of nitrate in agriculture, antiseptic, immune systems and blood circulation system.     

硝酸钐/硝酸镝/硝酸铒与组氨酸液-液反应的热动力学

稀土氨基酸配合物具有消炎、杀菌、降血糖等作用犤１犦。它们的晶体结构和相化学已有报道犤２，３犦。前报犤４犦曾详细报道了稀土硝酸盐与组氨酸配合行为的溶解度图和制备与表征。但文献中未见有关该类配合反应热动力学研究的报道。本文用微量热法对硝酸钐／硝酸镝／硝酸铒与组氨酸的液－液反应进行了热动力学研究。其结果可为这类配合物的反应机理研究和制备提供必要的技术参数。１实验部分１．１试剂RE（NO３）３·６H２O（RE＝Sm，Dy，Er）按文献犤５犦的方法制备。L－α－组氨酸为B．R．（上海康达氨基酸厂）；纯度＞９９．５％…     

Fluorimetric Determination of Nitrate

Abstract

A sensitive fluorimetric method has been developed for the determination of nitrate based on the reduction of nitrate to nitrite with hydrazine sulfate and the subsequent determination of the nitrite formed with 2, 3-diaminonaphthalene. Solvent effect on fluorescence intensity, optimum reaction conditions, and sensitivity of the method are discussed.     

Nitrate und Nitrite

Analytical and Bioanalytical Chemistry -     

Nitrate und Nitrite

Ohne Zusammenfassung     

Nitrite und Nitrate

Ohne Zusammenfassung     

Nitrate und Nitrite

Ohne Zusammenfassung