نتایج جستجو برای: nitric acid

تعداد نتایج: 807631  

Journal: :iranian journal of basic medical sciences 0
jian-lin zhou department of orthopedics, renmin hospital of wuhan university, wuhan, 430060, hubei province, people’s republic of china hong song fang department of orthopedics, renmin hospital of wuhan university, wuhan, 430060, hubei province, people’s republic of china hao peng department of orthopedics, renmin hospital of wuhan university, wuhan, 430060, hubei province, people’s republic of china qiong jie hu department of radiology, tongji hospital, tongji medical college, huazhong university of science and technology, wuhan 430030, hubei province, people’s republic of china shi qing liu department of orthopedics, renmin hospital of wuhan university, wuhan, 430060, hubei province, people’s republic of china jiang hua ming department of orthopedics, renmin hospital of wuhan university, wuhan, 430060, hubei province, people’s republic of china

objective(s): protein kinase c (pkcα) is involved in modulating articular chondrocytes apoptosis induced by nitric oxide (no). hyaluronic acid (ha) inhibits nitric oxide-induced apoptosis of articular chondrocytes by protecting pkcα, but the mechanism remains unclear. the present study was performed to investigate the effects and mechanisms of pkcα regulate protective effect of hyaluronic acid....

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2003
Kyue-Hyung Lee Koji Oshita Akhmad Sabarudin Mitsuko Oshima Shoji Motomizu

A simple method to estimate the amounts of ultra-trace metal impurities in nitric acid reagents has been developed. The determination of sixty-four metals in nitric acid was accomplished by direct measurements of 0.1 M nitric acids accurately diluted with ultrapure water by ICP-MS. Though accurate metal concentration could not be obtained for all of the elements, we could effectively evaluate t...

Journal: :Journal of physics 2022

Abstract Bubble column is a commonly used multiphase reactor. Owing to the complicated nature of its flow structure, computational fluid dynamics has frequently been as useful instrument for studying mechanics in bubble column. However, most previously studied systems are air-water system, while air-nitric acid solution system rarely reported. In present study, differences size distribution pur...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2006
mohammad reza ehsani

large reserves of coal in tabas region of iran are characterized by low ash and high caking index, suitable for use in metallurgy as coking coal. however, these coals cannot be gainfully utilized because of their high sulfur content. in this work, studies on desulfurization of tabas coals were carried out in a batch reactor using various reagents. the most effective reagents, fe2(so4)3 , fecl3 ...

Journal: :ChemPhysChem 2023

The Cover Feature represents acetohydroxamic acid degradation in used nuclear fuel reprocessing cycles, where it is broken down by hydrolysis and radiation aqueous nitric to form acetic acid, hydroxylamine, nitrous oxide, hydrogen gas. Designed Rett Longmore. More information can be found the Research Article Jacy K. Conrad, Gregory P. Horne co-workers.

The rate of hydrolysis of trans -[Cr(NH ) F ] was obtained as a function of acid concentsation in perchloric, sulfuric and nitric acid at 3Q°C. The results have been analyzed by the treatment of Bunnett and Olsen. Values of the parameter ?in Olsen equation are consistent with the participation of water as a proton-wansfer agent in the rate-determining step. The Arrhenius plot for perchlori...

Journal: :environmental health engineering and management 0
mohammad aali dehchenari student research committe, islamic azad university of majlesi, isfahan, iran saeed hosseinpoor young researchers and elite club, majlesi branch, islamic azad university, isfahan, iran rahim aali department of environmental health engineering, faculty of nursing and health, urmia university of medical sciences, urmia, iran nilowfar salighehdar department of health education and health promotion, tehran university of medical sciences, tehran, iran mohsen mehdipour environmental health engineering and member of environmental health engineering research center, kerman university of medical sciences, kerman, iran

background: this research studied the feasibility of a simple method for extracting gold from central processing units (cpus) of computer circuit boards without solvent. methods: ceramic and composite cpus of computer circuit boards were used. gold was extracted using a hydrometallurgical method in six stages: grinding of cpus, leaching in nitric acid, leaching in aqua regia, removing the exces...

2004
R. D. BIGGS

The rates of nitration of benzene by nitric acid in mixed acid to produce mononitrobenzene have been measured in well-emulsified reaction mixtures in the temperature range from 34’ to 54°C. The acid-phase compositions ranged from 1.6 mole % nitric acid and 27 mole % sulfuric acid to 35 mole % nitric acid and zero % sulfuric acid; the organicphase composition ranged from 4 to 95 mole ’ % benzene...

A Rezaei , S Esmaeilzadeh Bahabadi ,

Background: Nitric oxide is a free radical that recently has emerged as a key signaling molecule in regulating important physiological processes in plants. Objective: In this work, sodium nitroprusside (SNP) was utilized as the donor of nitric oxide to investigate the effects of exogenous nitric oxide on essential oil, rosmarinic acid and antioxidant activity of in vitro-cultured Melissa offi...

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