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iron | Element, Occurrence, & Compounds | Britannica.com

Jan 18, 2018 ... Iron: Iron (Fe), chemical element and one of the transition elements, the most-used and cheapest metal. ... For the treatment of hypochromic anemias (caused by iron deficiency), any of a large number of organic or inorganic iron (usually ferrous) compounds are .... 83 references found in Britannica articles...

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Iron compounds | Article about Iron compounds by The Free Dictionary

metallic chemical element; symbol Fe [Lat. ferrum]; at. no. 26; at. wt. 55.845; m.p. about 1,535°C;; b.p. about 2,750°C;; sp. gr. 7.87 at 20°C;; valence +2, +3, +4, or +6. Iron is biologically significant. Because iron is a component of hemoglobin, a red oxygen-carrying pigment of the red blood cells of vertebrates, iron compounds...

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Iron, Chemical Element - reaction, water, uses, elements, metal, gas ...

Iron normally does not occur as a free element in the earth. In fact, iron was not of much value to humans until they learned how to free iron from its compounds. Once they could do that, humans were able to make tools, weapons, household implements, and other objects out of iron. This step marked the beginning of the...

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Iron - Chemistry And Compounds - Water, Chemical, Oxygen, and ...

Iron typically displays one of two valences in forming compounds, 2+ and 3+. According to the older system of chemical nomenclature, these classes of compounds are known as the ferrous and ferric salts, of iron respectively. Because of the abundance of oxygen in the atmosphere, most naturally occurring iron compounds...

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Iron - Wikipedia

Iron chemical compounds have many uses. Iron oxide mixed with aluminium powder can be ignited to create a thermite reaction, used in welding and purifying ores. Iron forms binary compounds with the halogens and the chalcogens. Among its organometallic compounds is ferrocene, the first sandwich compound...

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Iron compounds and iron catalysts: Activity in reactions relevant to ...

The catalytic activity of various iron compounds was studied using a model compound, 4-(1-naphthylmethyl)bibenzyl, which exhibits distinct decomposition patterns for radical, ion-radical or acidic environments. It was found that selective carbon cleavage takes place when dry iron compounds such as iron (III) oxide,...

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Iron Compounds - Kirk-Othmer Encyclopedia of Chemical ...

This article provides a brief overview of the preparation, composition, properties, and uses of the principal compounds of iron. The compounds are divided into salts and simple coordination compounds, chelate compounds, organometallic compounds, and compounds of biological relevance. Whereas compounds of iron in...

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The Toxicity of Iron Compounds - NCBI - NIH

Full text. Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (278K), or click on a page image below to browse page by page. icon of scanned page 465. 465...

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iron facts, information, pictures | Encyclopedia.com articles about iron

These compounds, which include vitamin C and lactic acids, are commonly found in citrus and deciduous fruits and are known as metal chelators. In addition, an unidentified "meat factor" present in animal tissue also enhances the absorption of iron salts. Finally, heme iron has a much greater bioavailability than iron salts...

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Separation of cellular iron containing compounds by electrophoresis ...

Cite this article as: Vyoral, D., Petrák, J. & Hradilek, A. Biol Trace Elem Res (1998) 61: 263. https://doi.org/10.1007/BF02789087. DOI https://doi.org/10.1007/BF02789087; Publisher Name Humana Press; Print ISSN 0163-4984; Online ISSN 1559-0720. About this journal · Reprints and...

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Superconductivity in Iron Compounds

Jun 8, 2011 ... Abstract: Kamihara and coworkers' report of superconductivity at Tc = 26 K in fluorine-doped LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this new class of compounds. These iron pnictide and chalcogenide (FePn/Ch) superconductors have Fe electrons at the...

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impact of organic acid addition on the formation of precipitated iron ...

The acid have the capability to form complexes with iron and also showed impact on the formation of precipitated iron compounds. Keywords. iron compounds; metallic iron; acid addition; ilmenite ... Y. Marinovich, S. Bailey, J. Avraamides, S. Jayasekera: Journal of Applied Electrochemistry, Vol. 25, 1995, p. 823-832, doi:...

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Parenteral Iron Compounds: Potent Oxidants but Mainstays of ...

Parenteral Iron Compounds: Potent Oxidants but Mainstays of Anemia Management in Chronic Renal Disease ... Abstract. Ferric iron (Fe)–carbohydrate complexes are widely used for treating Fe deficiency in patients who are unable to meet their Fe requirements with oral supplements. ... Articles citing this article.

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First ever iron–bismuth binary compound | Research | Chemistry World

Oct 27, 2016 ... Save Article. Compound containing solid state iron–bismuth bond crystallised under extreme temperature and pressures. Crystal structure of FeBi2. Source: ACS Publications. The structure of FeBi2. Bismuth atoms are purple, iron are red. Scientists in the US have synthesised the first ever iron–bismuth...

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Microbial Iron Compounds | Annual Review of Biochemistry

Microbial Iron Compounds. Annual Review of Biochemistry. Vol. 50:715-731 (Volume publication date July 1981) https://doi.org/10.1146/annurev.bi.50.070181.003435. J B Neilands. Download PDF Article Metrics · Permissions · Reprints · Download Citation · Citation Alerts · Download Citation · Citation Alerts. Free first...

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Low molecular weight intracellular iron transport compounds | Blood ...

Article; Info & Metrics; e-Letters; PDF ... Evidence is presented for the existence of an intracellular pool of low molecular weight iron compounds which acts as an intermediate between extracellular iron ... It is in equilibrium with storage iron and iron enzymes and is of major importance in iron toxicity and chelation therapy.

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Magnetic iron compounds in the human brain: a comparison of ...

Iron is a central element in the metabolism of normal and malignant cells. Abnormalities in iron and ferritin expression have been observed in many types of cancer. Interest in characterizing iron compounds in the human brain has increased due to advances in determining a relationship between excess iron accumulation...

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Iron for Kids - Kiddle

This article is about iron the metal. For the tool called ... Chemical properties. Chemical compounds. Iron(II) compounds. Mixed oxidation state. Iron(III) compounds. Iron in the ground. Making iron. Uses. As a metal. As compounds ... Compounds where iron has two electrons taken are called ferrous compounds. Compounds...

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Use of Mössbauer Spectroscopy to Study ... - Corrosion Journal

Abstract. Mössbauer spectroscopy was used to study parameters of the reaction products of iron compounds (FeIII) and polyphenols with hydroxyl (OH) groups in ortho positions. Polyphenols used in the reaction were catechol, pyrogallol, gallic acid, and oak tannin. The Fe-containing compounds were hydrated ferric sulfate...

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Activated charcoal and gastric absorption of iron compounds ...

Abstract. A short cut review was carried out to establish whether activated charcoal is effective in iron overdose. Altogether 17 papers were found using the reported search, of which only one was relevant. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study...

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Relative Incidence of Acute Adverse Events with Ferumoxytol ...

Jan 30, 2017 ... Citation: Wetmore JB, Weinhandl ED, Zhou J, Gilbertson DT (2017) Relative Incidence of Acute Adverse Events with Ferumoxytol Compared to Other Intravenous Iron Compounds: A Matched Cohort Study. PLoS ONE 12(1): e0171098. https://doi.org/10.1371/journal.pone.0171098. Editor: Abelardo I.

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In situ characterization and mapping of iron compounds in ...

Aug 23, 2005 ... In situ characterization and mapping of iron compounds in Alzheimer's disease tissue ... Journal: Journal of Alzheimer's Disease, vol. 7, no. ... These results demonstrate a practical means of correlating iron compounds and disease pathology in-situ and have clear implications for disease pathogenesis and...

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Safety and efficacy of iron compounds (E1) as feed additives for all ...

nutritional additive, compounds of trace elements, iron, iron compounds, safety, environment, efficacy. First published in the EFSA Journal: 18 February 2016. Adopted: 27 January 2016. Last Updated: 22 June 2017. This version replaces the previous one/s. Type: Scientific Opinion. efsa journal icon Read it on the Wiley...

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Iron Compounds in Lake Sediments - Canadian Journal of Earth ...

Dried surface sediment from various Canadian lakes was characterized by X-ray diffraction and Mössbauer spectroscopy. At most two quadrupole doublets were found at room temperature, one ferrous, the other largely ferric. Their intensity ratio is related to the crystallinity of the sediments. It is also correlated with oxygen...

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Parenteral iron compounds sensitize mice to injury-initiated TNF-α ...

Intravenous Fe is widely used to treat anemia in renal disease patients. However, concerns of potential Fe toxicity exist. To more fully define its spectrum, this study tested Fe's impact on systemic inflammation following either endotoxemia or the induction of direct tissue damage (glycerol-mediated rhabdomyolysis).

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Effect of iron compounds on antibacterial function of human ...

Stimulation of bacterial growth in the presence of polymorphs depended on the degree of saturation of the plasma proteins which bind the Fe3+ or heme compounds. Hematin bound to albumin appeared to be readily available to K. pneumoniae. Free hemoglobin stimulated bacterial growth but the organism could not utilize...

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Treatment of iron deficiency anemia: Are monomeric iron ...

Article Outline. Methods. Procedures to predict and identify mononuclear iron compounds that are potentially suitable for parenteral administration; State of aggregation; Kinetics of iron transfer; Ligand-induced extraction of iron from ferritin; Stability; Conditional stability. Results and discussion; Conclusions...

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the role of iron-porphyrin compounds in biological oxidations

The iron-porphyrin compounds occupy a unique position among the oxidation-reduction systems of biological importance, because on combining with nitrogenous compounds they form complexes possessing manifold properties, all of them connected with the function of respiration. Thus, certain iron-prophyrins may...

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Iron and Ascorbic Acid: Proposed Fortification Levels and ...

Sep 1, 2003 ... The Journal of Nutrition, Volume 133, Issue 9, 1 September 2003, Pages 2978S–2984S, https://doi.org/10.1093/jn/133.9.2978S .... Ascorbic acid acts as a common nonheme pool ligand, increasing the absorption of both intrinsic food iron and fortification iron compounds that are soluble in gastric juice (12).

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Iron compounds and the mechanisms of the ... - IOPscience

Dec 14, 2016 ... Iron compounds and the mechanisms of the homogeneous catalysis of the activation of O2 and. H2O2 and of the oxidation of organic substrates. To cite this article: Aleksei Ya Sychev and V G Isak 1995 Russ. Chem. Rev. 64 1105. View the article online for updates and enhancements. Related content.

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Iron and aluminum compounds in commercial superphosphates ...

Iron and aluminum compounds in commercial superphosphates. A. William. Frazier, and James R. Lehr. J. Agric. Food Chem. , 1967, 15 (2), pp 348–349. DOI: 10.1021/jf60150a026. Publication Date: March 1967. Note: In lieu of an abstract, this is the article's first page. Click to increase image size Free first page. View: PDF.

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Superconductivity in iron compounds - Physical Review Link Manager

Dec 13, 2011 ... Kamihara and coworkers' report of superconductivity at Tc=26 K in fluorine-doped LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this new class of compounds. These iron pnictide and chalcogenide (FePn/Ch) superconductors have Fe electrons at the Fermi surface...

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Thermodynamic Properties of the Aqueous Ions (2+ and 3+) of Iron ...

Recommended thermochemical property values, ΔfH°, ΔfG°, and S° for the aqueous ions of iron, Fe2+ and Fe3+, are given at 298.15 K in SI units. They are consistent with the CODATA Key Values for Thermodynamics. The values are: ΔfH°=−90.0±0.5 kJ⋅mol−1, ΔfG°=−90.53±1.0 kJ⋅mol−1, S°=−101.6±3.7 J⋅mol−1⋅K−1...

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A New Type of Organo-Iron Compound | Nature

A New Type of Organo-Iron Compound. T. J. KEALY; & P. L. PAUSON. Nature 168, 1039–1040 (15 December 1951); doi :10.1038/1681039b0; Download Citation. Published online: 15 December 1951...

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Spin state switching in iron coordination compounds

The article deals with coordination compounds of iron(II) that may exhibit thermally induced spin transition, known as spin crossover, depending on the nature of the coordinating ligand sphere. Spin transition in such compounds also occurs under pressure and irradiation with light. The spin states involved have different...

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The Spheroidisation of Needle-form Iron Compounds in an Al-Si Alloy

Dec 7, 2016 ... Original Articles. The Spheroidisation of Needle-form Iron Compounds in an Al-Si Alloy ... The needle-like form of iron compound present in an eutectic Al-Si alloy has been changed to a spheroidal form as a result of heating the metal to a high temperature in the molten state and then pouring it into a...

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Secondary Deposition of Iron Compounds Following Acidizing ...

The attitude "it won't hurt and it might help" is no proper basis for choosing an iron control agent because many agents themselves can cause damage following an acid treatment. Introduction. Recently there has been increased interest in using chemical additives in acid to prevent secondary precipitation of iron compounds...

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Mutually Exclusive Alterations in Secondary Metabolism Are Critical ...

Neither the transporter that mediates the root export of phenolics or flavins nor the regulation of the synthesis of these compounds is understood in molecular terms. In this article, we dissect iron deficiency-induced changes in the transcriptome of two model species, Arabidopsis (Arabidopsis thaliana) and M. truncatula and...

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Prediction of superconducting iron–bismuth intermetallic ...

The synthesis of materials in high-pressure experiments has recently attracted increasing attention, especially since the discovery of record breaking superconducting temperatures in the sulfur–hydrogen and other hydrogen-rich systems. Commonly, the initial precursor in a high pressure experiment contains co.

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