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Selenenic acid A selenenic acid is an organoselenium compound and an oxoacid with the general formula RSeOH, where R ≠ H. It is the first member of the family of organoselenium oxoacids, which also include seleninic acids and selenonic acids, which are RSeOH and RSeOH, respectively. Selenenic acids derived from selenoe...
https://en.wikipedia.org/wiki?curid=37814523
Selenenic acid The reasoning for postulating selenenic acids as reactive intermediates is based in part on analogy with their more extensively studied sulfenic acid analogs. Selenenic acids derived from selenocysteine are involved in cell signaling and certain enzymatic processes. The best known selenoenzyme, glutathio...
https://en.wikipedia.org/wiki?curid=37814523
Resonance-assisted hydrogen bond The resonance assisted hydrogen bond (commonly abbreviated as RAHB) is a strong type of hydrogen bond. It is caused by the π-delocalization that involves the hydrogen and cannot be properly described by the electrostatic model alone. This description of the hydrogen bond has been propos...
https://en.wikipedia.org/wiki?curid=37815189
Field-induced polymer electroluminescent technology Field-induced polymer electroluminescent (FIPEL) technology is a low power electroluminescent light source. Three layers of moldable light-emitting polymer blended with a small amount of carbon nanotubes glow when an alternating current is passed through them. The tec...
https://en.wikipedia.org/wiki?curid=37821607
Willis Whitfield (December 6, 1919 – November 12, 2012) was an American physicist and inventor of the modern cleanroom, a room with a low level of pollutants used in manufacturing or scientific research. His invention earned him the nickname, "Mr. Clean," from "Time Magazine". Whitfield was born in Rosedale, Oklahoma, ...
https://en.wikipedia.org/wiki?curid=37824778
Eddy break-up model The eddy break-up model (EBU) is used in combustion engineering. Combustion modeling has a wide range of applications. In most of the combustion systems, fuel and oxygen (or air) are separately supplied in the combustion chamber. Due to this, chemical reaction and combustion occurs simultaneously in...
https://en.wikipedia.org/wiki?curid=37828428
Eddy break-up model The position where laminar flame is changing into turbulent flame is termed as "break-up point". Increase in jet velocity after critical limit results in decrease of the whole flame height. Beyond this point the height of the break-up point reaches a certain value where even after increasing the jet...
https://en.wikipedia.org/wiki?curid=37828428
Eddy break-up model While the turbulent flow induces changes concentration and temperature pulsations which enhance the mixing and heat transfer and affect the reaction rate. Turbulence also results in deformations in burning flame surface due to which folding occurs and the surface is also broken into pieces of differ...
https://en.wikipedia.org/wiki?curid=37828428
Eddy break-up model The reaction rate of fuel is considered to be smallest among all and is given by: The model also leads to determination of mass fraction of product and oxygen using transport equation of mixture fraction "(f)" For solving we need to first find the stociometric mixture fraction "(f)" when there is no...
https://en.wikipedia.org/wiki?curid=37828428
Cells Alive System The (CAS) is a line of commercial freezers manufactured by ABI Corporation, Ltd. of Chiba, Japan claimed to preserve food with greater freshness than ordinary freezing by using electromagnetic fields and mechanical vibrations to limit ice crystal formation that destroys food texture. They also are cl...
https://en.wikipedia.org/wiki?curid=37833942
Zeitschrift für Naturforschung B The "Zeitschrift für Naturforschung B: A Journal of Chemical Sciences" is a monthly peer-reviewed scientific journal. The journal publishes "fundamental studies in all areas of inorganic chemistry, organic chemistry, and analytical chemistry" in both English and German. Articles in Germ...
https://en.wikipedia.org/wiki?curid=37839060
Nik operon The nik operon is an operon required for uptake of nickel ions into the cell. It is present in many bacteria, but has been extensively studied in "Helicobacter pylori". Nickel is an essential nutrient for many microorganisms, where it participates in a variety of cellular processes. However, excessive levels...
https://en.wikipedia.org/wiki?curid=37844765
Nik operon The first method involves ABC-type transporters (discussed in this article) and the second mechanism makes use of transition-metal permeases (such as HoxN of "Ralstonia eutropha"). The ABC-type transporter system consists of five proteins, NikA–E, that carry out the ATP-dependent transport of Ni. NikA is a s...
https://en.wikipedia.org/wiki?curid=37844765
Thermoresponsive polymers in chromatography Thermoresponsive polymers can be used as stationary phase in liquid chromatography. Here, the polarity of the stationary phase can be varied by temperature changes, altering the power of separation without changing the column or solvent composition. Thermally related benefits...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography Dextrans of the highest molecular weight eluted first since the PIPA chains exhibit hydrophilicity at temperatures below the LCST. As the temperature of the elution increased, when the chains behave in a more hydrophobic manner, the elution times increased for each of the ana...
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Thermoresponsive polymers in chromatography For simplification the resultant polymer has been labeled as IBc (isopropylacrylamide butyl methacrylate copolymer). The polymers were synthesized using radical telomerization with varying BMA content. Where pure PNIPAAm was unable to resolve hydrophobic steroids at any tempe...
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Thermoresponsive polymers in chromatography The separation took place under isocratic conditions using pure water as the mobile phase, and controlled the temperature using a water bath. They were able to shift the LCST from 32 °C to 20 °C by making the solution 1M in NaCl concentration. Of the 5 steroids and benzene, o...
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Thermoresponsive polymers in chromatography Cyclohexanol acted as a successful porogen showing a dependent relationship of pore size to temperature. The use of toluene as a porogen gave results that were similar to unmodified macroporous particles. This indicates that PNIPAAm can be successfully grafted onto the surfac...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography To address the shortcomings of the previous methods, Kobayashi’s group grafted acrylic acid (anionic acrylate under neutral conditions) and tert-butylacrylamide (hydrophobic) monomers onto PNIPAAm, resulting in PNIPAAm-co-AAc-co-tBAAm (IAtB) onto silica beads as a stationary ...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography 5 and pH 6.0, the LCST decreased up to pH 9 and below pH 4.5. This can be interpreted as requiring slightly basic or moderately acidic conditions, as the 4.5–6.0 pH region holds a maximum value of the LCST, an unfavorable condition. They used these properties to separate seve...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography Chen and Hoffman used N-Hydroxysuccinimide (NHS) ester functional end group on NIPAAm to conjugate selectively with β-D-glucosidase. They found that the conjugated enzyme could be repeatedly precipitated and dissolved in solution and still maintain sufficient enzymatic activi...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography This exemplifies the need for selective moieties, maltose not residing among them. Finally, the application of pAPM was tested by attempting to separate α-glucosidase from yeast extract under low temperature conditions. In conclusion, the pAPM was found to recover 68% of α-gl...
https://en.wikipedia.org/wiki?curid=37850414
Thermoresponsive polymers in chromatography The approach they took to address those challenges meant incorporating TRP particles as a reversibly immobilized stationary phase. What separates this development from other AC methods is that the beads on which the modified TRP are attached can reversibly adhere to the inner...
https://en.wikipedia.org/wiki?curid=37850414
C11H15NO2S The molecular formula CHNOS may refer to:
https://en.wikipedia.org/wiki?curid=37850900
C36H22O18 The molecular formula CHO (molar mass: 742.52 g/mol, exact mass: 742.0806128 u) may refer to:
https://en.wikipedia.org/wiki?curid=37868550
C24H18O12 The molecular formula CHO (molar mass: 498.39 g/mol, exact mass: 498.07982598 u) may refer to :
https://en.wikipedia.org/wiki?curid=37869238
Transition metal benzyne complex Transition metal benzyne complexes are organometallic complexes that contain benzyne ligands (CH). Unlike benzyne itself, these complexes are less reactive although they undergo a number of insertion reactions. The studies of metal-benzyne complexes were initiated with the preparation o...
https://en.wikipedia.org/wiki?curid=37869513
Peroxynitric acid is the chemical compound with the formula . It is an oxoacid of nitrogen, after peroxynitrous acid. Peroxynitrate, the conjugate base of peroxynitric acid, is formed rapidly during decomposition of peroxynitrite in neutral conditions.
https://en.wikipedia.org/wiki?curid=37873772
Thomas J. Katz is an American organic chemist, who is known for his experimental work with prismane, olefin metathesis, and enyne metathesis. Katz earned a bachelor's degree in chemistry at the University of Wisconsin–Madison in 1956 and received his doctoral thesis in chemistry at Harvard in 1959. Katz's academic ties...
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Potassium pentasulfide is the inorganic compound with the formula KS. It is a red-orange solid that dissolves in water. The salt decomposes rapidly in air. It is one of several polysulfide salts with the general formula MS, where M = Li, Na, K and n = 2, 3, 4, 5. The polysulfide salts of potassium and sodium are simila...
https://en.wikipedia.org/wiki?curid=37881289
Mercury relay A mercury relay (mercury displacement relay, mercury contactor) is a relay that uses mercury as the switching element. They are used as high-current switches or contactors, where contact erosion from constant cycling would be a problem for conventional relay contacts. Owing to environmental considerations...
https://en.wikipedia.org/wiki?curid=37881997
Mercury relay For the more traditional normally open relay operation, the side contact is arranged somewhat higher up (or the volume of mercury is reduced) so that contact is not made when the iron slug is freely floating on the pool of mercury. The control coil is mounted below the rest level of the slug and when ener...
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Mercury relay A magnetic slug on the armature allows it to be rotated and controlled by an external electromagnet. Owing to the mass of mercury moved during switching, compared to that of the armature and spring leaves of a conventional relay, the mercury relay is not a high-speed device. Despite this, the mercury rela...
https://en.wikipedia.org/wiki?curid=37881997
Phoslock is the commercial name for a bentonite clay in which the sodium and/or calcium ions are exchanged for lanthanum. The addition of this element allows it to bind with phosphates to form rhabdophane (<chem>LaPO4.\mathit{n}H2O</chem>) and thereby remove them from the water column. It is used in lake restoration pr...
https://en.wikipedia.org/wiki?curid=37887483
C18H10O9 The molecular formula CHO (molar mass: 370.267 g/mol) may refer to:
https://en.wikipedia.org/wiki?curid=37887527
Brine rejection is a process that occurs when salty water freezes. The salts do not fit in the crystal structure of water ice, so the salt is expelled. Since the oceans are salty, this process is important in nature. Salt rejected by the forming sea ice drains into the surrounding seawater, creating saltier, denser bri...
https://en.wikipedia.org/wiki?curid=37890717
Brine rejection While the sea ice ages, desalinization occurs to such a degree that some multiyear ice has a salinity of less than 1 PSU. This occurs in three different ways: occurs in the sea ice packs around at the north and south poles of the earth [Fig. 3]. The Arctic Ocean has historically ranged from roughly 14-1...
https://en.wikipedia.org/wiki?curid=37890717
Brine rejection These frozen stalactite-like forms are fragile during early stages, but if brine drainage ceases, they may freeze solid. In calm waters, brinicles can reach the sea floor, freezing it fairly abruptly. The deep ocean basins are stably stratified, so mixing of surface waters with the deep ocean waters occ...
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Brine rejection Life in sea ice is energetically demanding, and sets limits at any hierarchical organizational, and organismic level, ranging from molecules to everything that an organism does. Despite this fact, the brine-containing interstices and pockets found in sea ice host a variety of organisms, including bacter...
https://en.wikipedia.org/wiki?curid=37890717
Zero Carbon World is a charity registered in England and Wales. It is also a Limited liability company. The objectives of the charity are: One way that aims to meet its objectives is the donation of Electric Vehicle Charging stations to various organisations around the UK. Sites that install donated chargers get added ...
https://en.wikipedia.org/wiki?curid=37890955
Bieckol may refer to:
https://en.wikipedia.org/wiki?curid=37897204
Thermally isolated system In thermodynamics, a thermally isolated system can exchange no mass or heat energy with its environment. The internal energy of a thermally isolated system may therefore change due to the exchange of work energy. The entropy of a thermally isolated system will increase in time if it is not at ...
https://en.wikipedia.org/wiki?curid=37898548
Mechanically isolated system In thermodynamics, a mechanically isolated system is a system that is mechanically constraint to disallow deformations, so that it cannot perform any work on its environment. It may however, exchange heat across the system boundary. For a simple system, mechanical isolation is equivalent to...
https://en.wikipedia.org/wiki?curid=37898741
Copper in renewable energy Renewable energy sources such as solar, wind, tidal, hydro, biomass, and geothermal have become significant sectors of the energy market. The rapid growth of these sources in the 21st century has been prompted by increasing costs of fossil fuels as well as their environmental impact issues th...
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Copper in renewable energy According to the United States Geological Survey, in-ground copper reserves have increased more than 700% since 1950, from almost 100 million tonnes to 720 million tonnes today, despite the fact that world refined usage has more than tripled in the last 50 years. Copper resources are estimate...
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Copper in renewable energy This is because copper is spread over much larger land areas, particularly in solar and wind energy power plants, and there is a need for long runs of power and grounding cables to connect components that are widely dispersed, including to energy storage systems and to the main electrical gri...
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Copper in renewable energy The recycling rate of copper is higher than any other metal. At the end of the useful life of the renewable energy power plant or its electrical or thermal components, the copper can be recycled with no loss of its beneficial properties. There is eleven to forty times more copper per unit of ...
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Copper in renewable energy PV cells are grouped together in solar modules. These modules are connected to panels and then into PV arrays. In grid-connected photovoltaic power system, arrays can form sub-fields from which electricity is collected and transported towards the grid connection. Copper solar cables connect m...
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Copper in renewable energy Challenges with solar cell metallization lie in the creation of a homogenous and qualitatively high-value layer between silicon and copper to serves as a barrier against copper diffusion into the semiconductor. Copper-based front-side metallization in silicon solar cells is a significant step...
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Copper in renewable energy Mono-dispersed copper sulfide nanocrystals are being researched as alternatives to conventional single crystals and thin films for photovoltaic devices. This technology, which is still in its infancy, has potential for dye-sensitized solar cells, all-inorganic solar cells, and hybrid nano-cry...
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Copper in renewable energy Complex cost evaluations, factoring extra costs for materials, the amount of solar radiation directed towards solar modules per year (accounting for diurnal and seasonal variations, subsidies, tariffs, payback periods, etc.) are necessary to determine whether higher initial investments for th...
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Copper in renewable energy Electrical power is produced when the concentrated light is converted to heat, which drives a heat engine (usually a steam turbine) connected to an electrical power generator. A CSP system consists of: 1) a concentrator or collector containing mirrors that reflect solar radiation and deliver ...
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Copper in renewable energy These plants collect solar energy in parabolic trough concentrators with linear collector tubes. The heat transfer fluids are typically synthetic oil that circulates through tubes at inlet outlet/temperatures of 300 °C to 400 °C. The typical storage capacity of a 50 MW facility is 7 hours at ...
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Copper in renewable energy Motorized valves for mass flow control in the loops rely on more copper. Mirrors use a small amount of copper to provide galvanic corrosion protection to the reflective silver layer. Changes in the size of the plants, size of collectors, efficiencies of heat transfer fluids will also affect m...
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Copper in renewable energy A 100 MW plant will have somewhat less copper per MW in process equipment. Linear Fresnel plants use linear reflectors to concentrate the Sun’s rays in an absorber tube similar to parabolic trough plants. Since the concentration factor is less than in parabolic trough plants, the temperature ...
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Copper in renewable energy Relatively more copper is needed in the solar field than other CSP technologies because electricity is actually generated there. Based on existing 1.5 MW plants, the copper content is 4 tonnes/MW, or, in other terms, 2.2 tonnes of copper/GWh/year. A 1.5 MW power plant has some 6,060 kg of cop...
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Copper in renewable energy Copper is an important component of solar thermal heating and cooling systems because of its high heat conductivity, resistance to atmospheric and water corrosion, sealing and joining by soldering, and mechanical strength. Copper is used both in receivers and primary circuits (pipes and heat ...
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Copper in renewable energy Solar thermal energy is absorbed within the evacuated tubes and is converted into usable concentrated heat. Copper heat pipes transfer thermal energy from within the solar tube into a copper header. A thermal transfer fluid (water or glycol mixture) is pumped through the copper header. As the...
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Copper in renewable energy The basic components of a wind power system consist of a tower with rotating blades containing an electricity generator and a transformer to step up voltage for electricity transmission to a substation on the grid. Cabling and electronics are also important components. The harsh environment o...
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Copper in renewable energy The cumulative amount of copper installed through 2011 was estimated to be 714 kt. , global production of wind turbines use 450,000 tonnes of copper per year. For wind farms with three-stage gearbox doubly fed 3 MW induction generators, approximately 2.7 t per MW is needed with standard wind ...
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Copper in renewable energy This resistance, called copper losses, causes energy to be lost by heating up the wire. In wind power systems, this resistance can be reduced with thicker copper wire and with a cooling system for the generator, if required. Either copper or aluminum conductors can be specified for generator ...
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Copper in renewable energy Conventional synchronous generators (CSG) direct-drive machines have the highest per-unit copper content. The share of CSGs will increase from 2009 to 2020, especially for direct drive machines. DFAGs accounted for the most unit sales in 2009. The variation in the copper content of CSG genera...
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Copper in renewable energy In conditions with low wind speed and turbulence, DFAGs could be preferred to PMSGs. Generally, PMSGs deal better with grid-related faults and they could eventually offer higher efficiency, reliability, and availability than geared counterparts. This could be achieved by reducing the number o...
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Copper in renewable energy A wind tower system with the transformer next to the generator will have medium-voltage (MV) power cables running from the top to the bottom of the tower, then to a collection point for a number of wind towers and on to the grid substation, or direct to the substation. The tower assembly will...
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Copper in renewable energy The grounding system, at the base of the mast, consists of a thick copper ring conductor bonded to the base or located within a meter of the base. The ring is attached to two diametrically opposed points on the mast base. Copper leads extend outward from the ring and connect to copper groundi...
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Copper in renewable energy Finally, minor amounts of copper are used in air/oil and water cooled circuits on gearboxes or generators. Class 5 copper power cabling is exclusively used from the generator through the loop and tower interior wall. This is due to its ability to withstand the stress from 15,000 torsion cycle...
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C19H20FN3 The molecular formula CHFN (molar mass: 309.381 g/mol) may refer to:
https://en.wikipedia.org/wiki?curid=37905049
C15H12I3NO4 The molecular formula CHINO (molar mass: 650.973 g/mol) may refer to:
https://en.wikipedia.org/wiki?curid=37909167
Magnetic inequivalence In the context of nuclear magnetic resonance (NMR), the term magnetic inequivalence refers to the distinction between magnetically active nuclear spins by their NMR signals, owing to a difference in either chemical shift ("magnetic inequivalence by the chemical shift criterion") or spin-spin coup...
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Magnetic inequivalence Most commonly, two chemically inequivalent pairs of hydrogen nuclei (protons) are involved, although other magnetically active nuclei will also show this phenomenon, and the spin system is often labelled an AA′BB′ system. Additional coupling partners may also be present, but it is the two A/A′ an...
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Magnetic inequivalence A classic example showing highly complex splitting is that of 1,2-dichlorobenzene. The two signals are nearly mirror-symmetrical. In 1,2-diaminobenzene ("ortho"-phenylenediamine), the two signals have nearly the same chemical shift, so that the resultant signals form a complex multiplet. H-2 and ...
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Magnetic inequivalence ") as well as unsubstituted or 1-substituted cyclopentadienes and 1-substituted cyclopentadienides all have the same symmetry framework as para-disubstituted or ortho-homodisubstituted benzenes, and will present chemically equivalent but magnetically inequivalent pairs of protons. In heterocycles...
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Magnetic inequivalence may occur with HC-CH fragments that are subdivided into two groups of two in either "geminal" relationships via a mirror plane along the C-C bond, "i.e." HHC-CHH, or in "vicinal" relationships via a mirror plane bisecting the C-C bond, "i.e." in HHC-CHH, or via a rotational axis of symmetry (a C-...
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Magnetic inequivalence A classic example is the H-NMR spectrum of 1,1-difluoroethylene. The single H-NMR signal is made complex by the "J" and two different "J" splittings. The F-NMR spectrum will look identical. The other two difluoroethylene isomers give similarly complex spectra. Whereas a four-spin AA′BB′ (or AA′XX...
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Magnetic inequivalence Thus, the appearance of such complexity in the aromatic region of the H-NMR spectrum of the "bis"-(acetylacetonato)ruthenium complex of o-benzoquinonediimine served to prove its "C"-symmetrical nature. Manual analysis of an AA′BB′ or AA′XX′ system is possible, if a sufficient number of peaks are ...
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Reciprocal silencing Reciprocal silencing, a genetic phenomenon that primarily occurs in plants, refers to the pattern of redundant genes being silenced following a polyploid event. Polyploidy (wholesale genome duplication) is common in plants and constitutes an important method of speciation. When a polyploid species ...
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Reciprocal silencing In one population, one of the two equivalent locci (A) is expressed while the other (B) has been silenced, while in the other population the reciprocal pattern occurs, with B being expressed and A silenced. It is important to note that this refers to equivalent loci, specific locations within the g...
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Reciprocal silencing This is an example of neofunctionalization, a process where duplicated genes that were once at equivalent loci evolve to carry out two separate functions. Since different tissues require different genes to be expressed, reciprocal silencing can occur between tissues. Importantly, while the pattern ...
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Néel effect In superparamagnetism (a form of magnetism), the appears when a superparamagnetic material in a conducting coil is subject to varying frequencies of magnetic fields. The non-linearity of the superparamagnetic material acts as a frequency mixer, with voltage measured at the coil terminals. It consists of sev...
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Néel effect The electromotive force to the terminals of a winding of the coil, formula_8, is given by the formula: where formula_10 is the magnetic induction given by the equation: In the absence of magnetic material, and Differentiating this expression, the frequency of the voltage is the same as the excitation curren...
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Néel effect When the excitation current is sinusoidal, the effect is Néel characterized by the appearance of a second harmonic carrying the information flow field: An important application of the is as a current sensor, measuring the magnetic field radiated by a conductor with a current; this is the principle of curren...
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Levamlodipine (INN), also known as levoamlodipine or S-amlodipine is a pharmacologically active enantiomer of amlodipine. Amlodipine belongs to the dihydropyridine group of calcium channel blocker used as an antihypertensive and antianginal agent. is currently marketed in Russia under the brand name EsCordi Cor (Actavi...
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Levamlodipine 5 mg) is . The plasma elimination half-life of levamlodipine has been found to be . Various clinical studies have shown that levamlodipine has more selectivity and better efficacy than ("R")-amlodipine. In pooled data, from three comparative studies conducted in 200 patients with mild to moderate hyperten...
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Levamlodipine The use of racemic amlodipine is commonly associated with adverse events like peripheral edema and other side effects like headache, dizziness, flushing and abdominal pain. Controlled clinical trials showed that levamlodipine is rarely associated with these side effects. No controlled clinical study of le...
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Progress in Polymer Science is a peer-reviewed scientific journal publishing review articles on topics broadly related to polymer chemistry. In 2018 the impact factor of this journal was 24.505, ranking it the highest in the subject category "Polymer Science". The journal is available since 1967. Currently it is edited...
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Collision between MV Testbank and MV Seadaniel The collision between MV "Testbank" and MV "Seadaniel" took place in the Mississippi River – Gulf Outlet Canal (MRGO) on July 22, 1980 when the outbound German container ship "Testbank" and inbound Panamanian-flagged bulk carrier "Seadaniel" collided near mile 41 of the ca...
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Collision between MV Testbank and MV Seadaniel Additionally, all fishing and shrimping operations in a area were temporarily suspended. The Coast Guard ultimately attributed the collision to the helmsman aboard "Seadaniel", who was evidently having difficulty controlling the ship immediately before the collision, and f...
https://en.wikipedia.org/wiki?curid=37921471
Collision between MV Testbank and MV Seadaniel "Seadaniel" was owned and operated by Fortune Sea Transport of Panama. She was a six-hold bulk carrier, built in 1976, diesel powered, with a single screw. She measured in length, in breadth, , and . "Seadaniel" was carrying baryte at the time of the collision.
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Lithium iodate (LiIO) is a negative uniaxial crystal for nonlinear, acousto-optical and piezoelectric applications. It has been utilized for 347 nm ruby lasers. Mohs hardness of lithium iodate is 3.5–4. Its linear thermal expansion coefficient at is 2.8·10/°C (a-axis) and 4.8·10/°C (c-axis). Its transition to β-form be...
https://en.wikipedia.org/wiki?curid=37921649
Barium manganate is an inorganic compound with the formula BaMnO. It is used as an oxidant in organic chemistry. It belongs to a class of compounds known as manganates in which the manganese resides in a +6 oxidation state. Manganate should not to be confused with permanganate in which contains manganese(VII). is a pow...
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Barium manganate Another use for barium manganate was as a pigment for making the artist’s color manganese blue. It is no longer used for that purpose; instead, paint manufacturers substitute a synthetic manganese blue hue.
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Arctic Challenger is a barge which has been converted by Superior Energy Services for use in the Arctic drilling operations of Shell Oil Company. This barge is designed to function as a "novel engineering solution" which they refer to as an Arctic Containment System to respond should a blowout event occur at drilling s...
https://en.wikipedia.org/wiki?curid=37926825
Arctic Challenger The major component of the project is the containment dome which is designed to be lowered over the blowout to vacuum up the spewing crude oil and natural gas and to deliver those products to the equipment on the ship for separation and processing to ameliorate the damage otherwise expected from a sub...
https://en.wikipedia.org/wiki?curid=37926825
Arctic Challenger While it’s a fourth line of defense in the unlikely event of a loss of well control, it will not be deployed until it meets our high standards.” From the report on the Deepwater Horizon oil spill by the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling: Industry’s respons...
https://en.wikipedia.org/wiki?curid=37926825
C15H12N2O2 The molecular formula CHNO may refer to:
https://en.wikipedia.org/wiki?curid=37930030
C20H26N4O5S The molecular formula CHNOS may refer to:
https://en.wikipedia.org/wiki?curid=37930059
Dihydroxycinnamic acid may refer to several molecules with the molecular formula CHO including:
https://en.wikipedia.org/wiki?curid=37935545
Functional magnetic resonance spectroscopy of the brain (fMRS) uses magnetic resonance imaging (MRI) to study brain metabolism during brain activation. The data generated by fMRS usually shows spectra of resonances, instead of a brain image, as with MRI. The area under peaks in the spectrum represents relative concentr...
https://en.wikipedia.org/wiki?curid=37936488
Functional magnetic resonance spectroscopy of the brain Like in vivo MRS, fMRS can probe different nuclei, such as hydrogen (H) and carbon (C). The H nucleus is the most sensitive and is most commonly used to measure metabolite concentrations and concentration dynamics, whereas C is best suited for characterizing fluxe...
https://en.wikipedia.org/wiki?curid=37936488
Functional magnetic resonance spectroscopy of the brain fMRS is continuously advancing as stronger magnets become more available and better data acquisition techniques are developed providing increased spectral and temporal resolution. With 7-tesla magnet scanners it is possible to detect around 18 different metabolite...
https://en.wikipedia.org/wiki?curid=37936488