Image Mitochondrial electrontransportchain Etc4.svg thumb 400px The electrontransportchain in the mitochondrion ... membrane.png thumb 400px Photosynthetic electrontransportchain of the thylakoid membrane. An electrontransportchain ETC couples electron transfer between an electron donor such as Nicotinamide adenine ... stress . Background The electrontransportchain consists of a spatially separated series of redox reactions ... that drives ATP synthesis. 194 ref The function of the electrontransportchain is to produce ... chain to oxygen, which is reduced to water. The electrontransportchain comprises an enzymatic series ... carriers and water soluble electron carriers. The overall electrontransportchain NADH Complex ... Peter D. Mitchell , the electrontransportchain and oxidative phosphorylation are coupled by a proton ... described as Complex V of the electrontransportchain. Citation needed date May 2010 The F ... needed date May 2010 Summary In the mitochondrial electrontransportchain electrons move from an electron ... electrontransportchain is NADH Complex I Q Complex III cytochrome c Complex IV O sub 2 sub where .... The generalized electrontransportchain in bacteria is Donor Donor Donor dehydrogenase quinone ... case electrons enter the electrontransportchain via NADH dehydrogenase similar to Complex ..., solid state environment. Electrons may enter an electrontransportchain at the level of a mobile ..., ferrous iron, etc. enter the electrontransportchain at the cytochrome level. When electrons enter at a redox level greater than NADH, the electrontransportchain must operate in reverse to produce ... electrontransportchain can be described as the sum of the NAD sup sup NADH redox pair ... acceptor e.g., O sub 2 sub through an electrontransportchain. In photophosphorylation , the energy ... from the donor to the acceptor through another electrontransportchain. Photosynthetic ... External links MeshName ElectronTransportChain Complex Proteins UMichOPM families superfamily ... more details
The Monte Carlo method for electrontransport is a semiclassical Monte Carlo MC approach of modeling semiconductor transport. Assuming the carrier motion consists of free flights interrupted by scattering ... transport equation The Boltzmann transport equation model has been the main tool used in the analysis of transport in semiconductors. The BTE equation is given by math frac partial f partial ... function which is used to extract all observable of interest and gives a full depiction of electron ... to the Boltzmann transport equation which includes complex band structure and scattering processes ... using the Fermi s Golden Rule , whereas the transport between scattering events is treated ... describing the motion of an electron is math frac dr dt frac 1 hbar nabla k E k math math frac dk ... useful information necessary for transport such as the density of states DOS and the particle ... from the moments of the Boltzmann transport equation BTE using simplified approximation valid ... from the moments of the Boltzmann Transport Equation BTE . ref name Choi W.S. Choi, J. K. Ahn ... and velocity overshoot in NMOS devices at the 0.1 gate length level, IEEE Electron Device ... Trans. Electron Devices, 43, pp. 1870 5 1996 ref The summary of simulation results Illinois Tool ... region. Monte Carlo for semiconductor transport Band structure Band structure describes the relationship ... 0 2 E g math where math m 0 math is the electron mass in vacuum, and Eg is the energy gap. ref name ... transport, which requires the better physical model of the full band structure. For full band approach ... to the movement of carriers. Random flight selection The probability that the electron will suffer its ... where P k t dt is the probability that an electron in the state k suffers a collision during the time ... Transport in Semiconductor with Application to Covalent Materials Rev. Modern Physics, vol.55, 3 ... mechanisms General background in solid state physics Important charge transport properties of semiconductor ... more details
into single line entries. Infobox Particle name Electron image File Crookes tube in use lateral view standing cross prPNr 11.jpg 280px alt A glass tube containing a glowing green electron beam caption ... Rays A History of J J Thomson s Electron url http books.google.com ?id xUzaWGocMdMC&printsec ... Warwick first2 A. year 2001 title Histories of the Electron The Birth of Microphysics url http ... 44 page 293 ref symbol SubatomicParticle Electron , SubatomicParticle beta mass val 9.10938215 ... ul MeV c2 ref name CODATA electric charge 1 elementary charge e ref group note The electron s charge ... 11 u Bohr magneton sub B sub ref name CODATA spin frac 1 2 The electron is a subatomic particle carrying a negative electric charge . It has no known components or substructure. Therefore, the electron is generally believed to be an elementary particle . ref name prl50 An electron has a rest mass mass that is approximately Proton to electron mass ratio 1 1836 that of the proton ref name nist codata mu The intrinsic angular momentum spin physics spin of the electron is a half integer value in units of reduced Planck constant , which means that it is a fermion . The antiparticle of the electron is called the positron . The positron is identical to the electron except that it carries electrical and other charge physics charge s of the opposite sign. When an electron collides with a positron ... mass. Since an electron is a fermion, no two electrons can occupy the same quantum state, in accordance ... in 1838 by British natural philosopher Richard Laming ref name arabatzis the name electron was introduced for this charge in 1894 by Irish physicist George Johnstone Stoney . The electron was identified ... , magnetism , and thermal conductivity , electrons play an essential role. An electron ... magnetic fields. When an electron is accelerated, it can absorb or radiate energy in the form of photons ... s law Coulomb force between an electron and a proton causes electrons to be Binding energy bound into atoms ... more details
, chain with square edges to prevent cutting with bolt cutters. High tensile chain or Transportchain ...for non mechanical chains Chain disambiguation Refimprove date December 2009 Image Broad chain closeup.jpg thumb A broad metal chain made of torus shaped links. Image Grave chain with diamond shaped link pins.jpg thumb A metal chain with diamond shaped link pins. Image Kettenvergleich.jpg thumb Roller chains. A chain is a series of connected links which are typically made of metal. A chain may consist ... the chain flexible in two dimension s The fixed third dimension being a chain s length. Those designed ... s of the machine, and are flexible in only one dimension. They are known as Roller chain s, though there are also non roller chains such as block chain . Uses for chain Uses for chain include Bicycle chain , transfers power from the pedals to the drive wheel of a bicycle thus propelling it Chain drive , the main feature that differentiated the safety bicycle Chain gun , type of machine gun that is driven by an external power source, sometimes connected by a chain, to actuate the mechanism rather than using recoil Chain pumps , type of water pump where an endless chain has positioned on it circular discs Chain linked Lewis , lifting device made from two curved steel legs Chainsaw , portable mechanical, motorized saw using a saw chain cutting chain to saw wood. Chain steam shipping Curb chain , used on curb bits when riding a horse Door chain , a type of security chain on a door that makes ... their way inside Keychain , a small chain that connects a small item to a keyring Lead shank or Stud chain , used on horses that are misbehaving Lavatory chain, the chain attached to the cistern ... height. Although cisterns no longer work like that, the phrase pull the chain is still encountered to mean flush the lavatory . O ring chain , a specialized type of roller chain Roller chain , the type of chain most commonly used for transmission of mechanical power on bicycles, motorcycles, and in industrial ... more details
CHAIN can refer to CHAIN programming language CHAIN industry standard , an acronym for European Committee of Domestic Equipment Manufacturers Ceced Home Appliances Interoperating Network, a standard for a multi brands home network of interactive household appliance s. Controlled and Harmonised Aeronautical Information Network , a concept of EUROCONTROL to improve the quality of aeronautical data. Canadian High Arctic Ionospheric Network See also Chain . disambig ... more details
other uses Refimprove date March 2008 Infobox song Name The Chain Cover Artist Fleetwood Mac Album Rumours ... file The Chain by Fleetwood Mac.ogg The Chain is a song from Fleetwood Mac s best selling album Rumours . The Chain is unique in being the only song credited to all five members of the Rumours era Fleetwood ... the song as a signature, citing the lyric, Never break the chain. According to interviews on the writing of Rumours , the final section of The Chain beginning with a bass progression was created by John ... back Fleetwood Mac s The Chain date 24 February 2009 publisher Daily Telegraph accessdate 19 ... boxed set titled 25 Years The Chain . In 1997, Fleetwood Mac released a live concert CD DVD package ... members. The rendition of The Chain reached number 30 on the Billboard Mainstream Rock Tracks chart. In 2002, Warner Bros. released the 2 CD set The Very Best of Fleetwood Mac , including The Chain . In 2009, Three Days Grace originally recorded The Chain for their album Life Starts Now but was one of the few not put on the record. However, since September 22, 2009, they have been playing The Chain at their concerts throughout their tour. On 29 March 2009, The Chain entered the UK Chart at 94 through ... One coverage, having regained broadcasting rights from ITV . On 20 March 2011, The Chain ... bass line from The Chain Motorsport composed by Roger Barsotti, which included the ending bass line and guitar solo of The Chain , ref cite web url http www.bbc.co.uk dna h2g2 A8623884 title BBC Sporting .... ITV did not continue its use as the opening theme. However, The Chain returned in 2009 as the F1 theme ... title BBC unveils 2009 F1 coverage and return of The Chain publisher crash.net date 2009 02 24 accessdate 2009 02 24 ref The full programme of Grand Prix was broadcast worldwide, and thus The Chain ... title The Chain ending description Sample of the ending and bassline of The Chain by Fleetwood Mac. format .... ref http gramourshots.com 2008 12 28 timing chain keep us together ref A cover of the song by the band ... more details
use. The final result is the electron is donated to an electron acceptor. During this process electrontransportchain the electron donor is oxidized and the electron acceptor is reduced. Petroleum hydrocarbons ...An electron donor is a chemical entity that donates electron s to another compound. It is a reducing agent that, by virtue of its donating electrons, is itself oxidize d in the process. Typical reducing agents undergo permanent chemical alteration through covalent or ionic reaction chemistry. This results in the complete and irreversible transfer of one or more electrons. In many chemical circumstances, however, the transfer of electronic charge to an electron acceptor may be only fractional, meaning an electron is not completely transferred, but results in an electron resonance between the donor ... retain their chemical identities. The electron donating power of a donor molecule is measured by its ionization potential which is the energy required to remove an electron from the highest occupied molecular orbital . The overall energy balance E , i.e., energy gained or lost, in an electron donor acceptor transfer is determined by the difference between the acceptor s electron affinity A and the ionization potential I math Delta E A I , math In chemistry , the class of electron donors that donate not just one, but a set of two paired electrons that form a covalent bond with an electron ... forces for electron donor and acceptor behavior in chemistry is based on the concepts of electropositivity for donors and electronegativity for acceptors of atomic or molecular entities. Electron donors in biology In biology , electron donors release an electron during cellular respiration , resulting in the release of energy . Microorganisms , such as bacteria , obtain energy in the electron ... compounds are all compounds that can act as electron donors. These reactions are of interest not only ... electron donor.html Electron donor definition at United States Geological Survey Category Electrochemistry ... more details
date March 2008 In biology , a terminal electron acceptor is a compound that receives or accepts an electron during cellular respiration or photosynthesis . All organisms obtain energy by transferring electrons from an electron donor to an electron acceptor. During this process electrontransportchain the electron acceptor is reduced and the electron donor is oxidized . See also redox Redox ...An electron acceptor is a chemical entity that accepts electron s transferred to it from another compound. It is an oxidizing agent that, by virtue of its accepting electrons, is itself reduced in the process. ref http toxics.usgs.gov definitions electron acceptor.html ref Typical oxidizing agents undergo permanent chemical alteration through covalent or ionic reaction chemistry, resulting in the complete and irreversible transfer of one or more electrons. In many chemical circumstances, however, the transfer of electronic charge from an electron donor may be only fractional, meaning an electron is not completely transferred, but results in an electron resonance between the donor and acceptor. This leads to the formation of charge transfer complex es in which the components largely retain their chemical identities. The electron accepting power of an acceptor molecule is measured by its electron ... . The overall energy balance E , i.e., energy gained or lost, in an electron donor acceptor transfer is determined by the difference between the acceptor s electron affinity A and the ionization potential I of the electron donor math Delta E A I , math . In chemistry , a class of electron acceptors that acquire not just one, but a set of two paired electrons that form a covalent bond with an electron ... forces for electron donor and acceptor behavior in chemistry is based on the concepts of electropositivity ... Examples of electron acceptors include oxygen , nitrate , iron III , manganese IV , sulfate , carbon ... definitions electron acceptor.html Electron acceptor definition at United States Geological Survey ... more details
Mergewith Electron beam processing date October 2008 Electron irradiation is a process which involves using electrons, usually of high energy, to treat an object for a variety of purposes. This may take place under elevated temperatures and nitrogen atmosphere. Possible uses for electron irradiation include Sterilization microbiology and to cross link polymers. Electron energies typically varies from the keV to MeV range, depending on the depth of penetration required. The irradiation dose is usually measured in Gray unit but also in Rad unit Mrads . Where 1Gy is equivalent to 100rad. In polymers, an cathode ray electron beam may be used on the material to induce effects such as chain scission which makes the polymer chain shorter and cross link cross linking . The result is a change in the properties of the polymer which is intended to extend the range of applications for the material. The effects of irradiation may also include changes in crystallinity as well as microstructure . Usually, the irradiation process polymer degradation degrades the polymer . The irradiated polymers may sometimes be characterized using Differential scanning calorimetry DSC , X ray crystallography XRD , Fourier transform spectroscopy FTIR , or Scanning electron microscopy SEM . In poly vinylidene fluoride trifluoroethylene copolymers, high energy electron irradiation lowers the energy barrier for the ferroelectric paraelectric phase transition and reduces polarization hysteresis losses in the material ref Z.Y. Cheng, V. Bharti, T. Mai, T. B. Xu, Q. M. Zhang, T. Ramotowski, K. A. Wright, R. Ting, Effect of High Energy Electron Irradiation on the Electromechanical Properties of Poly vinylidene Fluoride Trifluoroethylene 50 50 and 65 35 Copolymers , IEEE Trans. on Ultrasonics, Ferroelectrics and Frequency Control , 47 6 , 1296 1307, Nov 2000. ref . See also Electron beam lithography Beta Particle Beta decay Sterilization microbiology Examples of Irradiation references Category Radioactivity ... more details
The electron liquid is a model system used by physicists to theoretically study interactions among electrons. The uniform electron liquid is a well known model for simple metals like sodium or Aluminum. The ionic charges are assumed to be smudged out to form a uniform static positive background, and the electrons are assumed to move in this positive background which maintains charge neutrality. This is also ..., then we have the free electron gas, or the free Fermi gas . However, when the Coulomb interaction is switched ... is known as the electron gas. At zero temperature, this happens if the density is very high ... interaction is weak and the free electron gas is a good approximation. Thus the high density regime is known as an electron gas . Perturbation theory can be used in this regime to discuss the properties of weakly interacting electron systems. When math r s math becomes greater than unity, interactions are important and this regime is known as the electron liquid . The electron liquid model holds ... i.e, in low density electron systems , the electron liquid crystallizes forming a crystalline phase known as the Wigner crystal . Perturbation theory fails for electron liquids where math r s 1 math ... electrons thus weakening it , a free electron like model known as the Landau&ndash Fermi liquid theory ... map hyper netted chain method, or the Fermi hyper netted chain method. Because of Fermi statistics, the electrons in the electron liquid fill up to an energy level known as the Fermi energy math E F math . For a metal like Aluminum, math E F math is of the order of 12 electron Volts. If the temperature is greater than 12 eV, the electron liquid becomes partially degenerate, since the states above the Fermi energy begin to get occupied. Such electron fluids can be used to model dense, finite temperature ... T electron liquids M. W. C. Dharma wardana, Ed. E. K. U. Gross and S. Dreizler, Density Functional ... Category Electron Liquid ... more details
Image Cont dynode detector.jpg right thumb 300 px Continuous dynode electron multiplier An electron multiplier is a vacuum tube structure that multiplies incident charges. ref Citation doi 10.1063 1.1740838 title An Improved Electron Multiplier Particle Counter year 1947 last1 Allen first1 James S. journal ... , a single electron can, when bombarded on secondary emissive material, induce emission of roughly 1 to 3 electron s. If an electric potential is applied between this metal plate and yet another, the emitted ..., Electrons and Photons by a Secondary Electron Multiplier year 1939 last1 Allen first1 James journal Physical Review volume 55 pages 966 ref Hence the electron multiplier is often used as an ion detector. It could also be triggered by a photon causing vacuum photoemission of at least one electron. In a photomultiplier tube, a photo emissive surface is followed by an electron multiplier with several ... other, this might be called a discrete dynode multiplier. A voltage divider chain of resistors is usually used to place each dynode at a potential 100 200v more positive than the previous one. File Electron multiplier.svg thumb right The Continuous Electron Multiplier A continuous dynode structure is feasible ... as single channel electron multiplier CEM , and one of the most common is sold under the trade name Channeltron. Another geometry of continuous dynode electron multiplier is called the microchannel plate . ref Citation doi 10.1063 1.1683743 title Collection Efficiency of Continuous Dynode Electron ... ref It may be considered a 2 dimensional parallel array of very small continuous dynode electron multipliers ..., not tapered or funnel like. Applications In mass spectrometry electron multipliers are often used ... upload industryscience pdf electron multipliers ChannelBook.pdf Burle PHOTONIS Channeltron Handbook ... electron multipliers how electron multipliers work How Discrete Dynode Electron Multipliers work Category Measuring instruments Category Radio electronics Category Mass spectrometry Category Electron ... more details
Wiktionarypar electron An electron is a subatomic particle. Electron may also refer to Electron bird , a genus of birds Electron vehicle , an electric urban vehicle concept by AMC Electron computer hacker , a member of an Australian hacking group Acorn Electron , an 8 bit computer by Acorn Computers Ltd Visa Electron , a brand of credit or debit cards Electron engine , a video game engine by Obsidian Entertainment L 188W Electron , an Argentine Navy version of the Lockheed L 188 Electra Electron comic book character , character by Apokalupsis Webcomics Electron or elementary charge e See also Elektron alloy , a range of magnesium alloys Electro disambiguation Elektron disambiguation Electrum disambig ast Electr n dixebra fr Electron nl Electron pl Electron ... more details
ionizing them. In a Chain reaction chain reaction or an electron avalanche additional electrons recently ...An electron avalanche is a process in which a number of free electron s in a Transmission medium medium usually a gas are subjected to strong acceleration by an electric field , ion izing the medium s atoms by collision called impact ionization , thereby forming new electrons to undergo the same process in successive cycles. Electron avalanches are essential to the dielectric breakdown process within gases. The process can culminate in corona discharge s, streamer s, leader spark leader s, or in a electric spark spark or continuous electric arc arc that completely bridges the gap. The process extends to huge sparks streamers in lightning discharges propagate by formation of electron avalanches created in the high potential gradient ahead of the streamers advancing tips. Once begun, avalanches are often intensified by the creation of photoelectron s as a result of ultraviolet radiation emitted by the excited medium s atoms in the aft tip region. Analysis A plasma begins with a rare natural background ionization event of a neutral air molecule, perhaps as the result of photoexcitation or background radiation . If this event occurs within an area that has a high potential gradient , the positively electric charge charged ion will be strongly attracted toward, or repelled away from, an electrode depending on its polarity, whereas the electron will be acceleration accelerated in the opposite direction. Because of the huge mass difference, electrons are accelerated to a much higher ... and positive ions to be momentarily generated by just a single initial electron. However, free ... constant. In other words, one free electron at position X sub 1 sub will result in M free electrons ... is used to ionise a nearby gas molecule creating another accelerable electron. What differs is the source of this electron. When one or more electron avalanches occur between two electrodes of sufficient ... more details
A hot electron is an electron which is not in thermal equilibrium with the crystal lattice lattice . It occurs in the region of semiconductor device featuring high electric field s. See also Hot carriers injection Hot electron effect Source http semiconductorglossary.com default.asp?searchterm hot electron physics stub Category Charge carriers lt Kar tasis elektronas ... more details
Orphan date January 2011 Unreferenced date March 2009 Electron Equivalent is a concept commonly used in redox chemistry , reactions involving electron transfer , to define a quantity e.g. energy or moles relative to one electron. Gibbs free energy Energies of formation are often given as kilojoules per electron equivalent to enable calculation of specific reaction energies on a per electron basis. Reactions containing movement of electrons are often balanced such that reaction quantities are given in relation to the transfer of a single electron, allowing quantification of reactants and products in relation to a single electron transfer. Category Thermodynamic free energy Category Fundamental physics concepts Category Chemical reactions chemistry stub ... more details
Unreferenced stub auto yes date December 2009 Electron excitation is the movement of an electron to a higher energy state . This can either be done by photoexcitation PE , where the original electron absorbs the photon and gains all the photon s energy or by electrical Excited state excitation EE , where the original electron absorbs the energy of another, energetic electron. Within a semiconductor crystal lattice, thermal excitation is a process where lattice vibrations provide enough energy to move electrons to a higher energy band . When an excited electron falls back to a lower energy state again, it is called electron relaxation . This can be done by radiation of a photon or giving the energy to a third spectator particle as well. DEFAULTSORT Electron Excitation Category Electron Physics stub ja ... more details
Electron scattering is the process whereby an electron is deflected from its original trajectory . As they are charged particle s, they are subject to electromagnetic force s. Phenonema Electrons can be scattering scattered by other charged particles through the Coulomb s law electrostatic Coulomb forces . Furthermore, if a magnetic field is present, a traveling electron will be deflected by the Lorentz force . An extremely accurate description of all electron scattering, including quantum and relativistic aspects, is given by the theory of quantum electrodynamics . Types Common electron scattering processes include Compton scattering , in which an electron absorbs a photon and reemits it, changing the energy and momentum of both M ller scattering , in which two electrons scatter off of one another Bhabha scattering , in which an electron and a positron scatter Bremsstrahlung , in which an electron most commonly, but also any other particle passes by a heavy charged object like a nucleus , changes energy and direction, and emits a photon Deep inelastic scattering , in which a high energy electron interacts with a nucleus and breaks it up Synchrotron emission , in which an electron interacts with an external magnetic field, changes direction, and emits a photon. physics stub DEFAULTSORT Electron Scattering Category Electron Category Scattering it Scattering di elettroni ... more details
An electron orbital may refer to An atomic orbital , describing the behaviour of an electron in an atom A molecular orbital , describing the behaviour of an electron in a molecule See also Electron configuration , the arrangement of electrons in structures such as atoms or molecules Orbital hybridization , a combining of atomic orbitals to form an equal number of hybrid orbitals when forming certain molecule s disambig vi Orbital ... more details
Electron optics deals with the focusing and deflection of electron s using magnetic field magnetic and or electrostatic field s. Electron properties main electron Electrons are charged particles point charges with rest mass . The electron also has an associated spin of 1 2. While in motion an electron possesses kinetic energy, regardless of any imposed charge field this could be achieved by accelerating electrons via a voltage differential into a screened field free region, which initially imparts the energy required to accelerate the electron. Given sufficient voltage the electron can be accelerated .... With respect to electron optics, the nature of the electron as a charged particle causes electrons to interact with imposed electron fields, and their spin causes magnetic field interactions as well. These interactions form the fundamentals of electron optical theory. Field interactions Particle interpretation Magnetic fields interact with an electron in a manner that alters velocity independently ... field and the electron propagation vector, such that, in an infinite uniform field moving electrons take a circular motion at a constant radius dependent upon electron velocity and field strength ... cv eH math where r is the orbit radius, m is the mass of an electron, v is the electron velocity, e is the charge on the electron and H is the applied magnetic field. Electrons that have a velocity component .... In the case of an applied electrostatic field, an electron will deflect towards the positive gradient ... such as diffraction , a full analysis of electron paths can be obtained by solving Maxwell s equation ... with matter as they are sensitive to not only the nucleus, but also the matter s electron charge ... in electron optic systems. Penetration in vacuum is dictated by mean free path , a measure of the probability ... from Poisson statistics. See also Charged particle beam Electron beam technology Electron microscope ... Electron Optics Program DEFAULTSORT Electron Optics Category Electromagnetism de Elektronenoptik ... more details
Unreferenced stub auto yes date December 2009 Electron deficiency occurs when a compound has too few valence electron s for the connections between atoms to be described as covalent bond s. Electron deficient bonds are often better described as 3 center 2 electron bond s. Examples of compounds that are electron deficient are the borane s. The term electron deficient is also used in a more general way in organic chemistry , to indicate a pi bonding pi system such as an alkene or arene that has Polar effect electron withdrawing groups attached, as found in nitrobenzene or acrylonitrile . Instead of showing the nucleophilic character common with simple C C bonds, electron deficient pi systems may be electrophile electrophilic and susceptible to nucleophilic attack, as is seen in the Michael addition or in nucleophilic aromatic substitution . As the most extreme form of highly delocalized electron deficiency one can consider the metallic bond . DEFAULTSORT Electron Deficiency Category Chemical bonding Chem stub ar de Elektronenmangelbindung nl Elektronendefici ntie pt Defici ncia de el trons zh ... more details
mobility In solid state physics , the electron mobility characterizes how quickly an electron can ... quantity for Electron hole holes , called hole mobility . The term carrier mobility refers in general to both electron and hole mobility in semiconductors. Electron and hole mobility are special ... with an average velocity called the drift velocity , math , v d math . Then the electron mobility is defined as math ,v d mu E math . Electron mobility is almost always specified in units of square ... concentrations including donor and acceptor concentrations , defect concentration, temperature, and electron ... electric field, in a solid, electrons or, in the case of semiconductors , both electrons and electron ..., each electron is accelerated by the electric field. If the electron were in a vacuum, it would be accelerated to faster and faster velocities called ballistic transport . However, in a solid, the electron repeatedly scatters off Crystallographic defect crystal defects , phonons , impurities ... velocity, called the drift velocity . This net electron motion is usually much slower than the normally occurring random motion. In a semiconductor the two charge carriers, electrons and Electron hole ... transport is possible in solids if the electrons are accelerated across a very small distance as small ... The electron mobility is defined by the equation math ,v d mu E math . where E is the Euclidean vector ... of the electron drift velocity in other words, the electron drift speed caused by the electric field, and is the electron mobility. The hole mobility is defined by the same equation. Both electron and hole mobilities are positive by definition. Usually, the electron drift velocity in a material is directly proportional to the electric field, which means that the electron mobility is a constant ... math . If a semiconductor has both electrons and electron hole holes , the total conductivity is ref name BVZ math sigma e n mu e p mu h . math Examples Typical electron mobility for Silicon Si at room ... more details
Electron transfer ET is the process by which an electron moves from an atom or a chemical species e.g. ... routes. Additionally, the process of energy transfer can be formalized as a two electron exchange ... 12 352651 5. ref but there are now many examples of ET in organic chemistry . Classes of electron transfer There are several classes of electron transfer, defined by the state of the two redox centers and their connectivity Inner sphere electron transfer main Inner sphere electron transfer In inner ..., in which case the electron transfer event is termed intramolecular electron transfer. More commonly ... the ET event. In such cases, the electron transfer is termed intermolecular electron transfer .... Outer sphere electron transfer main Outer sphere electron transfer In outer sphere ET reactions, the participating redox centers are not linked via any bridge during the ET event. Instead, the electron ... intermolecular. Outer sphere electron transfer can occur between different chemical species or between ... between permanganate and its one electron reduced relative manganate MnO sub 4 sub sup sup Mn O sub 4 sub sup 2 sup MnO sub 4 sub sup 2 sup Mn O sub 4 sub sup sup In general, if electron transfer is faster than ligand substitution, the reaction will follow the outer sphere electron transfer. Often ... activated complex 3. Electron transfer 4. Relaxation of bond lengths, solvent molecules successor complex 5. Diffusion of products requires work w sub p sub Heterogeneous electron transfer main Heterogeneous electron transfer In heterogeneous electron transfer, an electron moves between a chemical species and a solid state electrode . Theories addressing heterogeneous electron transfer have ... theory of ET was developed by Rudolph A. Marcus to address outer sphere electron transfer and was based on a transition state theory approach. The Marcus theory of electron transfer was then extended to include inner sphere electron transfer by Noel Hush and Marcus. The resultant theory, called Marcus ... more details
DISPLAYTITLE Electron bird Taxobox name Electron image Electron platyrhynchum Panama 8a.jpg image width 250px image caption Broad billed Motmot regnum Animal ia phylum chordate Chordata classis Aves ordo Coraciiformes familia Motmot idae genus Electron genus authority Johannes Gistel Gistel , 1848 subdivision ranks Species subdivision Keel billed Motmot E. carinatum br Broad billed Motmot E. platyrhynchum Electron is a genus of the motmot s, a family biology family of Neotropics Neotropical near passerine bird s. The genus has two species Keel billed Motmot , Electron carinatum Broad billed Motmot , Electron platyrhynchum Both inhabit humid evergreen tropical forest. Both occur in Central America , and the Broad billed Motmot occurs in a large region of South America as well. They are distinguished from other motmots by their much wider bills. The rackets on their tails are less dramatic than those of many other motmot species and may be absent. The species are very similar except in adult plumage but the adult Keel billed resembles the juvenile Broad billed . A mixed pair apparently courting has been observed Howell and Webb 1995 . The name Electron is a Latin ization of the Ancient Greek word for amber , and can mean bright in scientific names Jaeger 1978 the amber colored eyes of the Keel billed Motmot Howell and Webb 1995 may be the connection. Fact date August 2007 The name was given 46 years before an elementary particle was named electron . References Cite book last Howell first Steve N. G. coauthors Webb, Sophie title A Guide to the Birds of Mexico and Northern Central America publisher Oxford University Press pages 439, 790 791 year 1995 id ISBN 0 19 854012 4 Cite book last Jaeger first Edmund C title A Source Book of Biological Names and Terms publisher Charles ... Electron Bird Category Momotidae Coraciiformes stub ca Electron fr Electron oiseau hu Electron nl Electron geslacht pl Electron ptaki ... more details
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