File redox reaction.png thumb 300px right Illustration of a redox reaction Redox portmanteau for red ... changed. This can be either a simple redox process, such as the oxidation of carbon to yield carbon ... electron transfer processes. Redox reactions, or oxidation reduction reactions, have a number of similarities to acid base reaction s. Fundamentally, redox reactions are a family of reactions ... devices on the talk page that should be consulted. Like acid base reactions, redox reactions are a matched ... as redox even though no electron transfer occurs such as those involving covalent bonds . Non redox reactions, which do not involve changes in formal charge , are known as Metathesis reaction chemistry metathesis reactions. File Redox Halves.png thumb 300px The two parts of a redox reaction ... . Combustion consists of redox reactions involving Radical chemistry free radicals . Etymology The word ... widely adopted by chemists. Oxidizing and reducing agents In redox processes, the reductant transfers ... and reducing agent that are involved in a particular reaction is called a redox pair . A redox ... and F.G.Herring General Chemistry , 8th edn. Prentice Hall 2002 , p.832 ref . For a redox reaction ... Examples of redox reactions A good example is the reaction between hydrogen and fluorine in which ... process clearer. Because there is no net change in charge during a redox reaction, the number of electrons ... The overall reaction is chem H 2 chem F 2 2 HF Displacement reactions Redox occurs in single displacement reactions or substitution reactions . The redox component of these types of reactions is the change ..., an alcohol , an aldehyde or a ketone , a carboxylic acid , and then a peroxide . Redox ... in most fertilizers . Redox reactions are the foundation of electrochemical cell s. The process of electroplating uses redox reactions to coat objects with a thin layer of a material, as in Chrome ... jewelry . The production of compact discs depends on a redox reaction, which coats the disc with a thin ... more details
Unreferenced date December 2009 Redox titration also called oxidation reduction titration is a type of titration based on a redox reaction between the analyte and titrant . Redox titration may involve the use of a redox indicator and or a Potentiometer measuring instrument potentiometer . Example An example of a redox titration is treating a solution of iodine with a reducing agent and using starch as indicator. Iodine forms an intensely blue complex chemistry complex with starch. Iodine I small sub 2 sub small can be reduced to iodide I small sup &minus sup small by e.g. thiosulphate S small sub 2 sub small O small sub 3 sub sup 2&minus sup small , and when all iodine is spent the blue colour disappears. This is called an iodometry iodometric titration. Most often of all, the reduction of iodine to iodide is the last step in a series of reactions where the initial reactions are used to convert an unknown amount of the solute the substance you want to analyze to an equivalent amount of iodine, which may then be titrated. Sometimes other halogen s or halogenoalkanes than iodine are used in the intermediate reactions because they are available in better measurable standard solution s and or react more readily with the solute. The extra steps in iodometric titration may be worth while because the equivalence point , where the blue turns a bit colourless, is more distinct than some other analytical or volumetric methods. See also Titration Oxidizing agent Reducing agent Redox indicator Iodometry Cerimetry DEFAULTSORT Redox Titration Category Titration ar de Redox Titration es Valoraci n redox it Titolazione di ossidoriduzione no Redokstitrering nn Redokstitrering pl Redoksymetria pt Titula o redox ru sr Redoks titracija fi Hapetus pelkistystitraus sv Redoxtitrering zh ... more details
Unreferenced date December 2009 A redox indicator also called an oxidation reduction indicator is an indicator that undergoes a definite color change at a specific electrode potential . The requirement for fast and reversible color change means that the oxidation reduction Chemical equilibrium equilibrium for an indicator redox system needs to be established very fast. Therefore only a few classes of organic redox systems can be used for indicator purposes. There are two common type of redox indicators metal organic complexes Ex. phenanthroline true organic redox system s Ex. Methylene blue Sometimes colored inorganic oxidant s or reductant s Ex. Potassium manganate , Potassium dichromate are also incorrectly called redox indicators. They can t be classified as true redox indicators because of their irreversibility . Almost all redox indicators with true organic redox system s involve a proton as a participant in their electrochemical reaction. Therefore sometimes redox indicators are also divided into two general groups independent or dependent on pH . pH independent redox indicators border 1 Indicator E sup 0 sup , V Color of Oxidized form Color of Reduced form 2,2 bipyridine Ru complex align center 1.33 V align center bgcolor white colorless align center bgcolor yellow yellow Nitro phenanthroline Fe complex align center 1.25 V align center bgcolor cyan cyan align center bgcolor red red N Phenylanthranilic acid align center 1.08 V align center bgcolor violet violet red align ... redox indicators border 1 Indicator E sup 0 sup , V at pH 0 E sup 0 sup , V at pH 7 Color of Oxidized ... red red align center bgcolor white colorless See also pH indicator DEFAULTSORT Redox Indicator Category Redox indicators Category Physical chemistry de Redoxindikator es Indicador redox fr Indicateur r dox it Indicatore chimica Indicatori di ossido riduzione ja pt Indicador redox ro Indicator redoxometric sr Redoksni indikator fi Redox indikaattori zh ... more details
multiple issues orphan May 2010 unreferenced May 2010 notability May 2010 A redox gradient is the biogeochemical sorting of reductant s and oxidants according to redox potential , with the most reducing conditions at depth, having its origin in the depletion of oxygen and the successive depletion of reactants with depth. They form in Stratification water stratified environments where oxygen does not penetrate deeper than the immediate surface environment. Examples include waterlogged soil s, marine pelagic and hemipelagic sediments, and, most notably, the Black Sea . Category Chemical reactions Category Chemical nomenclature Category Coordination chemistry ... more details
Infobox company name Redox Brands logo caption type Private genre fate Merged predecessor successor CR Brands foundation May 2000 founder Todd Wichmann br Richard Owen defunct End date 2006 location city West Chester Township, Butler County, Ohio West Chester, Ohio location country United States U.S. location locations area served key people Richard Owen, CEO industry Consumer goods products Laundry detergents services revenue operating income net income aum assets equity owner Todd Wichmann br Richard Owen minority parent Meriwether Capital br Allied Capital br Procter & Gamble P&G minor divisions subsid homepage URL example.com footnotes intl Redox Brands was a marketing company formed in 2000 by Todd Wichmann and Richard Owen , former executives with the multinational consumer products firm Procter & Gamble P&G . The company s first product was Oxydol brand purchased from P&G. P&G would continue manufacture Oxydol and provide back office support. ref cite news title Chips Off the P.& G. Block Can a Start Up Clean Up With Cast Off Brands? author Kruti Trivedi first Kruti last Trivedi url http www.nytimes.com 2000 08 05 business chips off the p g block can a start up clean up with cast off brands.html?src pm newspaper The New York Times date 2000 08 05 pages 1 5 accessdate 2011 02 16 ref Redox had won out over private label companies in the purchase of Oxydol. Biz detergent Biz was purchased in an auction from P&G in the Summer of 2000. Forbes estimated that Oxydol was sold for 7 ... 02 16 ref In March 2001, Allied Capital made its first investment in Redox and made an addition investment in August 2002. In 2002, Wichmann left Redox for another startup, HealthPro Brands . ref cite news title Sources Investment firm set to sell Redox Brands author Steve Watkins url http www.bizjournals.com ... ChemPro, Inc. in March 2006. Allied then merged Redox and ChemPro, Inc., with the resulting company being renamed CR Brands . ref cite news title ChemPro Inc. to merge with Redox Brands author Jim ... more details
Redox signaling is when free radicals , reactive oxygen species ROS , and other electronically activated ... scar formation. Arguably, hydrogen sulfide and carbon monoxide are also redox signaling molecules. Similarly ... redox signaling. For a review, see Forman ref Forman, H.J. , Signal transduction and reactive species ... component of redox signaling appears to be that of Peter Proctor Proctor , ref cite journal ... 0 doi 10.1016 0092 8674 84 90318 0 ref Electronic conduction in redox signaling Hush ref Hush, N.S. ... of ROS such as hydrogen peroxide ref Shlomai 2010. Redox Control of Protein DNA Ineractions .... Antioxidants and Redox Signaling 13 1429 1476 ref underlies much biotic and abiotic stress signaling ... s or thioredoxin s. ref Winterbourn C.C., and Hampton M.B. 2008. Thiol chemistry and specificity in redox ... oxidation redox sensitive thiol groups include i signal transduction pathway proteins, such as phosphatase s ref Tanner J.J., Parsons Z.D., Cummings A.H., Zhou H., Gates K.S. 2011. Redox Regulation of Protein Tyrosine Phosphatases Structural and Chemical Aspects. Antioxidants & Redox Signaling ... D, Kuhn H. 2010. Redox control in mammalian embryo development. Antioxidants & Redox Signaling ..., Caito S, Yao H, and Rahman I. 2010. Oxidative stress, thiol redox signaling methods in epigenetics. Methods Enzymol.474 213 44. ref ref Shlomai 2010. Redox Control of Protein DNA Ineractions From Molecular ... and Redox Signaling 13 1429 1476 ref Similarly, the tyrosine specific Protein tyrosine phosphatase ... sense intracellular redox potential through the conserved cysteine in their active sites ref ... ref As an example, when chelating redox active iron present in the endosomal lysosomal ... powis laboratory current research index.html , as are other aspects of redox signaling ref Gupta ... Redox Signal. 2012 Jan 16. http www.ncbi.nlm.nih.gov pubmed 22117137 ref . ref D az B, Courtneidge SA. Redox signaling at invasive microdomains in cancer cells. Free Radic Biol Med. 2012 Jan 15 52 2 ... more details
Refimprove date August 2007 Redox therapy is an unproven alternative cancer treatment that aims to treat cancer with redox chemical agent s, usually given through the diet. This form of treatment involves the use of high doses of antioxidant chemicals, especially vitamin C as nutritional ascorbic acid or more usually intravenous sodium ascorbate , but also lipoic acid , Vitamin K3 vitamin K sub 3 sub and coenzyme Q10 , attempting to kill cancer cells while leaving healthy cells alive. Much of the research in this area follows the work of Linus Pauling , who was an early advocate of this idea. However, the main way in which it is suggested that vitamin C and other antioxidants kills cancer cells is, paradoxically, by acting as a pro oxidant . In the redox cycle in cancer cells, vitamin C cycles between ascorbate and dehydroascorbate . In this process, hydrogen peroxide is produced within the cell. Cancer cells, unlike other cells, have low amounts of antioxidant enzyme s, notably catalase . Fact date November 2007 In a healthy cell, catalase would convert peroxide to oxygen and water. However, in a cancer cell, the peroxide is thought to build up to toxic levels and kill the cell. Fact date October 2007 Some types of cancer cells have a much higher uptake of vitamin C than other cells. Vitamin C is structurally similar to glucose and can be transported by glucose pumps in cells, and cancer cells have a higher glucose uptake than other cells. Fact date January 2008 While levels of vitamin C in the blood are high enough to kill some cancers, vitamin C can be received orally Fact date October 2007 , most cancers require, according to proponents of the therapy, intravenous injections of up to 100g of sodium ascorbate per day, at spaced intervals. Clinical trials Mayo Moertel studies While ascorbate treatments have been proposed by many professionals over a period of decades ... lead to increased expected lifetime according to proponents. ref fn1 ref fn2 ref fn3 Typical redox ... more details
Image BirchReductionScheme.svg frame right Organic redox reactions The Birch reduction Organic reductions or organic oxidations or organic redox reactions are redox reaction s that take place with organic compound s. In organic chemistry oxidations and reductions are different from ordinary redox reactions because many reactions carry the name but do not actually involve electron transfer in the electrochemistry electrochemical sense of the word ref March Jerry 1885 . Advanced Organic Chemistry reactions, mechanisms and structure 3rd ed. . New York John Wiley & Sons, inc. ISBN 0 471 85472 7 ref . Following the rules for determining the oxidation number for an individual carbon atom leads to oxidation number 4 for alkane s, oxidation number 2 for alkene s, alcohol s, alkyl halide s, amine s, oxidation number 0 for alkyne s, ketone s, aldehyde s, geminal diol s, oxidation number 2 for carboxylic acid s, amide s, chloroform and oxidation number 4 for carbon dioxide , tetrachloromethane . Methane is oxidized to carbon dioxide because the oxidation number changes from 4 to 4. Classical reductions include alkene reduction to alkane s and classical oxidations include alcohol oxidation oxidation of alcohol s to aldehyde s. In oxidations electrons are removed and the electron density of a molecule is reduced. In reductions electron density increases when electrons are added to the molecule. This terminology is always centered around the organic compound. For example, it is usual to refer to the reduction of a ketone by lithium aluminium hydride , but not to the oxidation of lithium aluminium ... substitution . Many redox reactions in organic chemistry have coupling reaction reaction mechanism involving free radical intermediates. True organic redox chemistry can be found in electrochemical ... s salt or TEMPO References reflist Organic reactions Category Organic redox reactions ca Reacci redox org nica es Reacci n redox org nica fr Oxydo r duction en chimie organique nl Organische redoxreactie ... more details
In geology, a redox buffer is an assemblage of minerals or compounds that constrains oxygen fugacity as a function of temperature. Knowledge of the redox conditions or equivalently, oxygen fugacities at which a rock forms and evolves can be important for interpreting the rock history. Iron, sulfur, and manganese are three of the relatively abundant elements in the Earth s crust that occur in more than one oxidation state. For instance, iron, the fourth most abundant element in the crust, exists as native iron, ferrous iron Fe sup 2 sup , and ferric iron Fe sup 3 sup . The redox state of a rock affects the relative proportions of the oxidation states of these elements and hence may determine both the minerals present and their compositions. If a rock contains pure minerals that constitute a redox buffer, then the oxygen fugacity of equilibration is defined by one of the curves in the accompanying fugacity temperature diagram . Image Oxygen Buffers.jpg 400px right thumb Fugacity temperature diagram . Log oxygen fugacity vs temperature at 1 bar pressure for common buffer assemblages, plotted ... be calculated, and the redox conditions can be obtained by comparison to the fugacity temperature diagram. Common redox buffers and mineralogy Common redox buffers Redox buffers were developed in part ... occurring in a buffer. These redox buffers are listed here in order of decreasing oxygen fugacity ... and correlations with redox buffer The ratio of Fe sup 2 sup to Fe sup 3 sup within a rock determines ..., at redox conditions more oxidizing than the MH magnetite hematite buffer, at least much of the iron ... than the IW iron wustite buffer, minerals such as pyroxene can still contain Fe sup 3 sup . The redox ... from those of the FMQ fayalite magnetite quartz redox buffer. Nonetheless, there are systematic ... in some serpentinite s. Extraterrestrial rocks Within meteorite s, the iron w stite redox buffer may be more appropriate for describing the oxygen fugacity of these extraterrestrial systems. Redox ... more details
demonstration and commercial development of the all vanadium redox flow battery employing vanadium ... in the United States and China. ref http www.pdenergy.com contact info.html ref The vanadium redox ..., Europe, North America and elsewhere. The vanadium redox battery exploits the ability of vanadium ... that has just one electroactive element instead of two. The main advantages of the vanadium redox ... redox technology are a relatively poor energy to volume ratio, and the system complexity ... of a Vanadium Flow Battery Operation A vanadium redox battery consists of an assembly of power ... 65 75 . Citation needed date February 2012 Generation 2 vanadium redox batteries vanadium Polyhalide ... can operate Citation needed date February 2012 . Energy density Current production vanadium redox batteries ... large capacities possible from vanadium redox batteries make them well suited to use in large ... self discharge characteristics of vanadium redox batteries make them useful in applications ... Courage See also Portal Energy http www.vanadiumsite.com vanadium redox battery wind turbine generator and storage The Need for Vanadium Redox Energy Storage in Wind Turbine Generators Net electricity ... Rechargeable batteries Category Flow batteries Category Vanadium da Vanadium redox flow celle de Vanadium Redox Akkumulator eo Vanadia redoksa akumulatoro it Batterie redox al vanadio nl Vanadium redox accumulator ja ... more details
Chemical oxidation may refer to Redox reactions, which involving oxidation and reduction of chemicals In situ oxidation , an environmental remediation technique disambig ... more details
F420 may refer to Coenzyme F420 , a coenzyme involved in redox reactions in methanogens HMNZS Tutira F420 , a 1948 Loch class frigate of the Royal New Zealand Navy Letter NumberCombDisambig ... more details
PMRS is an abbreviation that may refer to Palestinian Medical Relief Society , a community based Arab health organization, that offers grassroots medical services in the West Bank. The Plasma membrane redox system . See also Medical Aid for Palestinians disambiguation ... more details
Pfam box Symbol Hsp33 Name Hsp33 protein Pfam PF01430 InterPro IPR000397 PROSITE PDB PDB 1hw7 PDB 1i7f PDB 1vq0 PDB 1vzy PDB 1xjh Hsp33 protein is a molecular chaperone , distinguished from all other known chaperones by its mode of functional regulation. Its activity is redox regulated. Hsp33 is a cytoplasmically localized protein with highly reactive cysteines that respond quickly to changes in the redox environment. Oxidizing conditions like H sub 2 sub O sub 2 sub cause disulphide bonds to form in Hsp33, a process that leads to the activation of its chaperone function ref name PUB00000967 cite journal author Jakob U, Muse W, Eser M, Bardwell JC title Chaperone activity with a redox switch journal Cell volume 96 issue 3 pages 341 352 year 1999 pmid 10025400 doi 10.1016 S0092 8674 00 80547 4 ref . References reflist Chaperones Category Heat shock proteins InterPro content IPR000397 ... more details
Unreferenced date December 2009 A reduced gas is a gas with a low redox oxidation number or high reduction , and is usually hydrogen rich. Strongly reduced gases include methane , ammonia , and hydrogen sulfide . Such gases are strongly associated with the origin of life . DEFAULTSORT Reduced Gas Category Hydrogen Chem stub ar ... more details
The faradaic current is the Electric current current generated by the redox reduction or oxidation of some chemical substance at an electrode . The net faradaic current is the algebraic sum of all the faradaic currents flowing through an indicator electrode or working electrode . ref GoldBookRef file F02321 title faradaic current ref References references chem stub Category Electrochemistry ... more details
Bismuth phosphate process was a process used to extract plutonium from used nuclear fuel taken from nuclear reactor s. ref cite patent country US number 2799553 title Phosphate method for separation of radioactive elements inventor Stanley G. Thompson and Glenn T. Seaborg status patent ref ref cite patent country US number 2785951 title Bismuth Phosphate Method for the Separation of Plutonium from Aqueous Solutions inventor Stanley G. Thompson and Glenn T. Seaborg status patent ref This process was used to produce all the plutonium of the atomic bomb dropped on Nagasaki in 1945. In 1952 this process was replaced by the Redox ref cite web url http www.hanford.gov page.cfm REDOX title Reduction Oxidation Plant REDOX ref ref cite journal title Plutonium mobilization and matrix dissolution during experimental sludge washing of bismuth phosphate, redox, and purex waste simulants author Bond, A.H. and Nash, K.L. and Gelis, A.V. and Sullivan, J.C. and Jensen, M.P. and Rao, L. journal Separation Science and Technology volume 36 number 5 6 pages 1241 1256 year 2001 publisher M. Dekker, New York url http actinide.lbl.gov lrao paper PuSludge01.pdf ref and PUREX processes. References reflist http www.bonestamp.com sgt process.htm Thompson s Process nuclear power stub Category Nuclear reprocessing Category Plutonium ... more details
Orphan date June 2011 Abiotic decomposition or abiotic degradation is degradation of a substance by chemical or physical processes, for example hydrolysis , redox reduction and oxidation . ref Water Quality Vocabulary. ISO 6107 6 1994 ref References reflist See also Biotic decomposition Chemical decomposition DEFAULTSORT Abiotic Decomposition Category Biodegradation ... more details
confuse Schuetze reagent Schultze reagent is an Redox oxidizing mixture consisting of a saturated aqueous solution of potassium chlorate KClO sub 3 sub and varying amounts of concentrated nitric acid HNO sub 3 sub . It is commonly used in Palynology palynologic Acid maceration macerations . It was invented by Max Schultze . Category Oxidizing mixtures inorganic compound stub ... more details
The reduction oxidation sensitive green fluorescent protein roGFP is a redox sensitive biosensor . Two cysteine s were introduced into the beta barrel structure of the GFP, the oxidation state reduced dithiol or the oxidized disulfide of the engineered thiols determines the fluorescence properties of the sensor. ref name Hanson 2004 cite journal author Hanson GT, Aggeler R, Oglesbee D, Cannon M, Capaldi RA, Tsien RY, Remington SJ title Investigating mitochondrial redox potential with redox sensitive green fluorescent protein indicators journal J Biol Chem volume 279 issue 13 pages 13044 53 year 2004 pmid 14722062 doi 10.1074 jbc.M312846200 ref Originally different roGFP versions were presented, for in vivo imaging of reducing compartments such as the cytosol roGFP2, with cysteine s introduced at the amino acid positions 147 and 204, turned out to be the most suitable version. ref name Schwarzlander 2008 cite journal author Schwarzlander M., Fricker, M.D., Muller, C., Marty, L., Brach, T., Novak, J., Sweetlove, L.J., Hell, R., and Meyer, A.J. title Confocal imaging of glutathione redox potential in living plant cells journal J Microsc volume 279 issue 2 pages 299 316 year 2008 pmid 18778428 doi 10.1111 j.1365 2818.2008.02030.x ref roGFP2 preferentially interacts with glutaredoxins and therefore reports the cellular glutathione redox potential . ref name Meyer 2007 cite journal author Meyer, A.J., Brach, T., Marty, L., Kreye, S., Rouhier, N., Jacquot, J.P., and Hell, R. title Redox sensitive GFP in Arabidopsis thaliana is a quantitative biosensor for the redox potential of the cellular glutathione redox buffer. journal Plant J volume 52 issue 5 pages 973 86 year 2007 doi 10.1111 ..., T.P. title Real time imaging of the intracellular glutathione redox potential. journal Nat Methods ... compartment allows to measure the glutathione redox potential in a specific cellular compartment at real ... LJ title Monitoring the in vivo redox state of plant mitochondria Effect of respiratory inhibitors ... more details
of gene expression by redox potential and the requirement for chloroplast and mitochondrial genomes . ref name pmid8114509 cite journal author Allen JF title Control of gene expression by redox potential ..., regulatory control of the redox state of their gene products, or of electron carriers with which .... The requirement for redox control of each gene in the primary subset then confers an advantage upon ... no requirement for redox control of expression of genetic system genes, though their being subject to redox control may, in some cases, allow amplification molecular biology amplification of redox ... subset genetic system genes is necessary for the operation of redox control of expression of genes ... completely. However, if even only one gene remains under redox control, then an organelle ... of protein synthesis in isolated chloroplasts and mitochondria are obtained in the presence of redox reagents with different redox potential s. ref name Allen 1995 cite journal author Allen CA, Hakansson G, Allen JF title Redox Conditions Specify the Proteins Synthesized by Isolated Chloroplasts and Mitochondria journal Redox Report volume 1 issue 1 pages 119 123 year 1995 pmid doi url http jfallen.org publications pdf Allen 1995 RR.pdf ref In mitochondria, the effect results from a redox signal ... transcription according to the redox state of the electron carrier plastoquinone . ref name ... Transcription genetics transcription in chloroplasts to plastoquinone redox state. ref name pmid18632566 ... . Chloroplast sensor kinase is part of a redox two component regulatory system in eukaryotes. ref ... more details
Orphan date January 2011 In cyclic voltammetry , the Randles Sevcik equation describes the effect of scan rate on the peak current i sub p sub . For simple redox events such as the ferrocene ferrocenium couple, i sub p sub depends not only on the concentration and diffusional properties of the electroactive species but also on scan rate. ref P. Zanello, Inorganic Electrochemistry Theory, Practice and Application The Royal Society of Chemistry 2003. ISBN 0 85404 661 5 ref i sub p sub 0.4463 nFAC nF D RT sup 1 2 sup Or if the solution is at room temperature i sub p sub 269,000 n sup 3 2 sup AD sup 1 2 sup C sup 1 2 sup i sub p sub current maximum in amps n number of electrons transferred in the redox event usually 1 A electrode area in cm sup 2 sup F The Faraday constant Faraday Constant in C mol sup 1 sup D diffusion coefficient in cm sup 2 sup s C concentration in mol cm sup 3 sup scan rate in V s For novices in electrochemistry, the predictions of this equation appear counter intuitive, i.e. that i sub p sub increases at faster scan rates. Uses Using the relationships defined by this equation, the diffusion coefficient of the electroactive species can be determined. Linear plots of i sub p sub vs. sup 1 2 sup provide evidence for a chemically reversible redox process vs the cases where redox causes major structural change in the analyte. For species where the diffusion coefficient is known or can be estimated , the slope of the plot of i sub p sub vs. sup 1 2 sup provides information into the stoichiometry of the redox process. References references See also On line calculator for use of Randles Sevcik equation http www.calctool.org CALC chem electrochem cv1 Category Electrochemical equations ... more details
the redox reduction oxidation flow battery , a reversible fuel cell in which all electroactive ... difference between these two types of flow batteries is that the energy of the redox flow battery, as with other ... secondary batteries . Using this historical convention, a redox flow battery is better described as a secondary ... in a fuel cell described above. The misnomer of redox flow battery rather than reversible fuel ... intercalation in a Lithium Ion Battery do not apply to redox flow batteries, but the Electron ... cell on NASA s Helios Prototype . The European Patent Organisation classifies redox flow cells H01M8 18C4 as a sub class of regenerative fuel cells H01M8 18 . Examples of redox flow batteries are the Vanadium Redox Flow Battery vanadium redox flow battery , polysulfide bromide battery Regenesys , and uranium redox flow battery. Ref Shiokawa Hybrid flow batteries include the zinc bromine flow battery zinc bromine , Zinc cerium redox flow battery zinc cerium Ref P.K. Leung and lead acid battery lead acid flow batteries. Redox fuel cells are less common commercially although many systems have been ... redox battery Vanadium vanadium sulphate 1.4 800 25 Vanadium redox battery Vanadium vanadium bromide ... bromine 1.85 1,000 75 lead acid battery Lead acid methanesulfonate 1.82 1,000 Zinc cerium redox flow ... Redox flow batteries, and to a lesser extent hybrid flow batteries, have the advantages ... balancing electrical power Load balancing Redox electrode Vanadium redox battery Vanadium redox flow battery Zinc cerium redox flow battery Zinc cerium hybrid flow battery Zinc bromine flow battery ... M. Bartolozzi, Development of redox flow batteries. A historical Bibliography, J. Power Sources ... elements for a redox flow battery, J. Nucl. Sci. Tech., vol. 37, pp. 253 256, 2000. Note P.K.Leung ... Ltd. Note Kummer and Oei 1982 J. T. Kummer and D. G. Oei, A chemically regenerative redox fuel cell ... on the uranium redox flow battery http www.fraunhofer.de en press research news 2009 10 improved ... more details
Chemical reactions are defined usually in small contexts only up to a small number of neighbouring atoms , such generalizations are a matter of utility. The preferential outcome of one instance of a generalized reaction over a set of other plausible reactions, is defined as chemoselectivity . ref http www.iupac.org goldbook C01051.pdf IUPAC Gold Book definition for chemoselectivity . ref In another definition, chemoselectivity refers to the selective reactivity of one functional group in the presence of others often this process in convoluted and protecting groups are used to ensure that this outcome can be attained. Practicing chemists typically try to predict whether or not an instance of a particular generalized reaction will yield product based on the molecular connectivity alone. Such predictions based on connectivity are generally considered plausible, but the physical outcome of the actual reaction is ultimately dependent on a number of factors that are practically impossible to predict to any useful accuracy solvent, atomic orbitals , etc. . As such, chemoselectivity can be difficult to predict, but observing selective outcomes in cases where many reactions are plausible, is common. Examples include the selective organic Redox reduction of 4 nitro 2 chlorobenzonitrile to the corresponding aniline, 4 amino 2 chlorobenzonitrile and the greater relative chemoselectivity of sodium borohydride Redox reduction vs. lithium aluminium hydride Redox reduction . In another example, the compound 4 methoxyacetophenone is oxidized by bleach at the ketone group at high pH forming the carboxylic acid and oxidized by Electrophilic aromatic substitution EAS to the aryl chloride at low pH ref cite DOI 10.1021 ed800054s ref References Reflist Category Chemical reactions et Kemoselektiivsus es Quimioselectividad it Chemoselettivit ... more details
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