نتایج جستجو برای: Fe (II)

تعداد نتایج: 650598  

Journal: :Applied and environmental microbiology 2013
Anirban Chakraborty Flynn Picardal

We evaluated the inducibility of nitrate-dependent Fe(II)-EDTA oxidation (NDFO) in non-growth, chloramphenicol-amended, resting-cell suspensions of Dechloromonas sp. strain UWNR4 and Acidovorax sp. strain 2AN. Cells previously incubated with Fe(II)-EDTA oxidized ca. 6-fold more Fe(II)-EDTA than cells previously incubated with Fe(III)-EDTA. This is the first report of induction of NDFO by Fe(II).

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1999
ali akbar khandar masoumeh khatamian

4(4-nitrophenyl-zao)-2-(2-methoxy phenimino)-phenol and its coordination compounds with ni(ii), cu(ii), co(ii) and fe(iii) have been synthesized and characterized by elemental analyses, ft-ir, far-ir, near ir, uv-vis, mass spectrometry and molar conductivity and their electrochemical behaviours are reported.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان فارس - دانشکده علوم پایه 1390

یک روش جدید گونه شناسی، پیش تغلیظ و اندازه گیری (fe(ii و (fe(iii به وسیله ی نانوذرات مگنتیت پوشیده از اکسید آلومینا(fe3o4/al2o3 nps) به عنوان فاز جامد با استفاده از همی مایسل های مخلوط(mhspe) به همراه تجزیه ی اسپکترومتری جذب اتمی شعله به کار رفت. فرایند بر اساس تشکیل کمپلکس (fe (ii با 1و10-فنانترولین به عنوان عامل کمپلکس دهنده با (fe (ii که بر روی نانوذرات مغناطیسی پوشیده شده با آلومینا وسدیم د...

Abbas Ali Samadi Mahtab Piroozmand Nasser Safari,

First row transition metal complexes of phthalocyanine are employed as catalysts for the oxidation of cyclohexene and cyclooctene using iodosylbenzene and pentafluoroiodosyl benzene. The catalysis was performed in dichloromethane: methanol:water (80:18:2) solvent mixture.  The products of the catalysis for cyclohexene are epoxycyclohexane, 2-cyclohexene-1-ol and 2-cyclohexene-1-one whereas ...

2017
Quan Chen Zhifei Liu Catherine Kissel

The East Asian summer monsoon controls the climatic regime of an extended region through temperature and precipitation changes. As the East Asian summer monsoon is primarily driven by the northern hemisphere summer insolation, such meteorological variables are expected to significantly change on the orbital timescale, influencing the composition of terrestrial sediments in terms of both mineral...

Arash Javanshir Khoei, Hassan Parvizimosaed , Mahsa Tahergorabi, Mehran Moslemi, Parisa Delfieh, Raziyeh Zandipak , Seyed Mehdi Hosseini, Soheil Sobhanardakani,

Background: Heavy metals have been recognized as harmful environmental pollutant known to produce highly toxic effects on different organs and systems of both humans and animals. The aim of this paper is to evaluate the adsorption potential of chitosan for the removal of Pb(II), Fe(II) and Cu(II) ions from aqueous solutions. Methods: This study was conducted in laboratory scale. In this paper ...

Journal: :iranian journal of toxicology 0
سهیل سبحان اردکانی soheil sobhanardakani . department of the environment, college of basic sciences, hamedan branch, islamic azad university, hamedan, iran. رضیه زندی پاک raziyeh zandipak msc environment, young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran. حسن پرویزی مساعد hassan parvizimosaed young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran. آرش جوانشیرخویی arash javanshir khoei department of fisheries, college of agriculture & natural resources, university of tehran, karaj, iran. مهران مسلمی mehran moslemi department of fisheries, jouybar branch, islamic azad university, jouybar, iran. مهسا طاهرگورابی mahsa tahergorabi department of public health, kerman university of medical sciences, kerman, iran. سیدمهدی حسینی

background: heavy metals have been recognized as harmful environmental pollutant known to produce highly toxic effects on different organs and systems of both humans and animals. the aim of this paper is to evaluate the adsorption potential of chitosan for the removal of pb(ii), fe(ii) and cu(ii) ions from aqueous solutions. methods: this study was conducted in laboratory scale. in this paper c...

2007
HEIDI A. CROSBY

Microbial dissimilatory iron reduction (DIR) is widespread in anaerobic sediments and is a key producer of aqueous Fe(II) in suboxic sediments that contain reactive ferric oxides. Previous studies have shown that DIR produces some of the largest natural fractionations of stable Fe isotopes, although the mechanism of this isotopic fractionation is not yet well understood. Here we compare Fe isot...

Journal: :Applied and environmental microbiology 2009
Alexandre J Poulain Dianne K Newman

Diverse bacteria are known to oxidize millimolar concentrations of ferrous iron [Fe(II)] under anaerobic conditions, both phototrophically and chemotrophically. Yet whether they can do this under conditions that are relevant to natural systems is understood less well. In this study, we tested how light, Fe(II) speciation, pH, and salinity affected the rate of Fe(II) oxidation by Rhodobacter cap...

2012
E. D. Melton C. Schmidt A. Kappler

The distribution of neutrophilic microbial iron oxidation is mainly determined by local gradients of oxygen, light, nitrate and ferrous iron. In the anoxic top part of littoral freshwater lake sediment, nitrate-reducing and phototrophic Fe(II)-oxidizers compete for the same e(-) donor; reduced iron. It is not yet understood how these microbes co-exist in the sediment and what role they play in ...

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