首页> 美国卫生研究院文献>Environmental Health Perspectives >Enhanced generation of hydroxyl radical and sulfur trioxide anion radical from oxidation of sodium sulfite nickel(II) sulfite and nickel subsulfide in the presence of nickel(II) complexes.

【2h】

Enhanced generation of hydroxyl radical and sulfur trioxide anion radical from oxidation of sodium sulfite nickel(II) sulfite and nickel subsulfide in the presence of nickel(II) complexes.

机译：在镍（II）配合物存在下亚硫酸钠亚硫酸镍（II）和亚硫化镍的氧化可增强羟基自由基和三氧化硫阴离子自由基的生成。

代理获取

本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。

页面导航

摘要
著录项
相似文献
相关主题

摘要

Electron spin resonance (ESR) spin trapping was utilized to investigate the generation of free radicals from oxidation of sodium sulfite, nickel(II) sulfite, and nickel subsulfide (Ni3S2) by ambient oxygen or H2O2 at pH 7.4. The spin trap used was 5,5-dimethyl-1-pyrroline-N-oxide (DMPO). Under ambient oxygen, a solution of sodium sulfite alone generated predominantly sulfur trioxide anion radical (.SO3-) due to the autoxidation of sulfite. Addition of nickel(II) chloride [Ni(II)] enhanced the .SO3- yield about 4-fold. Incubation of sulfite with Ni(II) in the presence of chelators such as tetraglycine, histidine, beta-alanyl-3-methyl-L-histidine (anserine), beta--L-histidine (carnosine), gamma-aminobutyryl-L-histidine (homocarnosine), glutathione, and penicillamine did not have any significant effect on that enhancement. In contrast, albumin, and especially glycylglycylhistidine (GlyGlyHis), augmented the enhancing effect of Ni(II) by factors of 1.4 and 4, respectively. Computer simulation analysis of the spin-adduct spectrum and formate scavenging experiment showed that the mixture of sodium sulfite, Ni(II), and GlyGlyHis generated both hydroxyl (.OH) radical and .SO3- radical, in the ratio of approximately 1:2. The free-radical spin adduct intensity reached its saturation level in about 5 min. The yield of the radical adducts could be slightly reduced by deferoxamine and very strongly reduced by diethylenetriaminepentaacetic acid (DTPA). Aqueous suspensions of sparingly soluble nickel(II) sulfite in the presence of air and GlyGlyHis generated surface-located .SO3- and .OH radicals. The same radicals were generated in Ni3S2 suspension in the presence of GlyGlyHis and H2O2, indicating sulfite production by oxidation of the sulfide moiety of this compound.(ABSTRACT TRUNCATED AT 250 WORDS)

机译：利用电子自旋共振（ESR）自旋俘获技术研究了亚硫酸钠，亚硫酸镍（II）和亚硫化镍（Ni3S2）在环境氧或H2O2在pH 7.4的条件下的氧化反应所产生的自由基。使用的自旋阱是5,5-二甲基-1-吡咯啉-N-氧化物（DMPO）。在环境氧气下，由于亚硫酸盐的自氧化作用，单独的亚硫酸钠溶液主要生成三氧化硫阴离子自由基（.SO3-）。添加氯化镍（II）[Ni（II）]使SO3-产率提高约4倍。在螯合剂如四甘氨酸，组氨酸，β-丙氨酰基-3-甲基-L-组氨酸（鸟氨酸），β-L-组氨酸（肌氨酸），γ-氨基丁酰基-L-存在下，将亚硫酸盐与Ni（II）一起孵育组氨酸（高卡嘧啶），谷胱甘肽和青霉素对这种增强作用没有明显影响。相反，白蛋白，尤其是甘氨酰甘氨酰组氨酸（GlyGlyHis）分别以1.4和4倍的比例增强了Ni（II）的增强作用。对自旋加合物光谱和甲酸清除实验的计算机模拟分析表明，亚硫酸钠，Ni（II）和GlyGlyHis的混合物同时生成羟基（.OH）和.SO3-自由基，比例约为1：2 。自由基自旋加合物的强度在约5分钟内达到饱和水平。去铁胺可以使自由基加合物的收率稍微降低，而二亚乙基三胺五乙酸（DTPA）则可以大大降低自由基加合物的产率。在空气和GlyGlyHis存在下，微溶性亚硫酸镍（II）的水悬浮液会产生表面定位的.SO3-和.OH自由基。在GlyGlyHis和H2O2存在下，Ni3S2悬浮液中产生了相同的自由基，表明该化合物的硫化物部分被氧化生成亚硫酸盐。（摘要截短为250字）

著录项

期刊名称 Environmental Health Perspectives
作者
X Shi; N Dalal; K S Kasprzak;
展开▼
作者单位

展开▼
年(卷),期 1994(102),Suppl 3
年度 1994
页码 91–96
总页数 6
原文格式 PDF
正文语种
中图分类公共卫生工程;
关键词

相似文献

外文文献
中文文献
专利

1. High-valent nickel oxamides. Part 2. Molecular and electronic structure of square-planar nickel(II), nickel(III) and nickel(III) pi-cation radical complexes with a tetradentate o-phenylenedioxamidate redox-active ligand [J] . Carrasco R, Cano J, Ottenwaelder X, Dalton transactions: An international journal of inorganic chemistry . 2005,第15期

机译：高价草酰胺镍。第2部分。具有四齿邻苯二氧肟酸酯氧化还原活性配体的方形平面镍（II），镍（III）和镍（III）π-阳离子自由基配合物的分子和电子结构
2. Atmospheric leaching characteristics of nickel and iron in limonitic laterite with sulfuric acid in the presence of sodium sulfite [J] . Luo Jun, Li Guanghui, Rao Mingjun, Minerals Engineering . 2015,第Null期

机译：亚硫酸钠存在下硫酸对锂铁锰矿中镍和铁的大气浸出特性。
3. Time measurement-visual analysis of nickel(II) using autocatalytic reaction with sodium sulfite/hydrogen peroxide system and its application to the length detection-flow analysis [J] . Jun Kato, Tetsuo Higuchi, Toshio Kubota, Analytica chimica acta . 2007,第2期

机译：亚硫酸钠/过氧化氢系统自催化反应的镍（II）的时间测量-可视化分析及其在长度检测流分析中的应用
4. Thin nickel films growth using plasma enhanced atomic layer deposition from #x03B7;³-2-methylallyl N, N'-diisopropylacetamidinate nickel(II) [C] . Yokota Jiro, Lansalot Clement, Ko Changhee 2013 IEEE International Interconnect Technology Conference . 2013

机译：使用等离子增强原子层从η^{3 -2-甲基烯丙基N，N'-二异丙基乙酰胺酸镍（II）沉积镍薄膜}
5. Exploration of vinylcyclopropane radical cyclization-fragmentation, Indirect electroreductive cyclization and electrohydrocyclization using catalytic reduced nickel(II) salen, and, Mechanistic details of indirect electroreductive cyclization using catalytic reduced nickel(II) salen. [D] . Miranda, James Anthony. 2006

机译：探索乙烯基环丙烷自由基环化-片段化，使用催化还原镍（II）萨伦的间接电还原环化和电氢环化，以及使用催化还原镍（II）萨伦的间接电化环化的机理细节。
6. Theoretical and Experimental Studies of the Spin Trapping of Inorganic Radicals by 55-Dimethyl-1-Pyrroline N-Oxide (DMPO). 3. Sulfur Dioxide Sulfite and Sulfate Radical Anions [O] . Pedro L. Zamora, Frederick A. Villamena -1

机译：用55-二甲基-1-吡咯啉N-氧化物（DMPO）旋转无机自由基自旋捕获的理论和实验研究。 3.二氧化硫亚硫酸盐和硫酸盐的阴离子
7. Enhanced generation of hydroxyl radical and sulfur trioxide anion radical from oxidation of sodium sulfite, nickel(II) sulfite, and nickel subsulfide in the presence of nickel(II) complexes. [O] . Shi, X, Dalal, N, Kasprzak, K S 1994

机译：在镍（II）配合物存在下，亚硫酸钠，亚硫酸镍（II）和亚硫化镍的氧化可增强羟基自由基和三氧化硫阴离子自由基的生成。
8. Dimethyl Sulfoxide Complexes of Chromium(Iii), Manganese(Ii), Iron(Iii), Nickel(Ii), and Copper(Ii) Nitrates and Magnesium and Nickel(Ii) Perchlorates. Part 1. Preparation and Nuclear Magnetic Resonance and Infrared Studies [R] . Moniz, W. B., Poranski, C. F., Venezky, D. L. 1967

机译：二甲基亚砜配合物的铬（III），锰（Ii），铁（Iii），镍（Ii）和铜（Ii）硝酸盐和镁和镍（Ii）高氯酸盐。第1部分。制备和核磁共振和红外研究

Enhanced generation of hydroxyl radical and sulfur trioxide anion radical from oxidation of sodium sulfite nickel(II) sulfite and nickel subsulfide in the presence of nickel(II) complexes.

摘要

著录项

相似文献

相关主题

期刊订阅