text stringlengths 11 320k | source stringlengths 26 161 |
|---|---|
Metals in medicine are used in organic systems for diagnostic and treatment purposes. [ 1 ] Inorganic elements are also essential for organic life as cofactors in enzymes called metalloproteins . When metals are under or over-abundant in the body, equilibrium must be returned to its natural state via interventional and... | https://en.wikipedia.org/wiki/Metals_in_medicine |
The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times in Africa, Europe and throughout Asia: [ 1 ] gold , silver , copper , tin , lead , iron , and mercury .
Zinc , arsenic , and antimony were also known during antiquity, but they were not recognised as distinc... | https://en.wikipedia.org/wiki/Metals_of_antiquity |
Metalworking is the process of shaping and reshaping metals in order to create useful objects, parts, assemblies, and large scale structures. As a term, it covers a wide and diverse range of processes, skills, and tools for producing objects on every scale: from huge ships , buildings, and bridges , down to precise eng... | https://en.wikipedia.org/wiki/Metalworking |
In organometallic chemistry , metal–halogen exchange is a fundamental reaction that converts an organic halide into an organometallic product. The reaction commonly involves the use of electropositive metals (Li, Na, Mg) and organochlorides, bromides, and iodides. Particularly well-developed is the use of metal–halogen... | https://en.wikipedia.org/wiki/Metal–halogen_exchange |
Metal–inorganic frameworks (MIFs) are a class of compounds consisting of metal ions or clusters coordinated to inorganic ligands to form one-, two-, or three-dimensional structures. They are a subclass of coordination polymers , with the special feature that they are often porous . They are inorganic counterpart of Me... | https://en.wikipedia.org/wiki/Metal–inorganic_framework |
Metal–insulator transitions are transitions of a material from a metal (material with good electrical conductivity of electric charges ) to an insulator (material where conductivity of charges is quickly suppressed). These transitions can be achieved by tuning various ambient parameters such as temperature, [ 1 ] press... | https://en.wikipedia.org/wiki/Metal–insulator_transition |
In organometallic chemistry , a metal–ligand multiple bond describes the interaction of certain ligands with a metal with a bond order greater than one. [ 1 ] Coordination complexes featuring multiply bonded ligands are of both scholarly and practical interest. transition metal carbene complexes catalyze the olefin met... | https://en.wikipedia.org/wiki/Metal–ligand_multiple_bond |
In inorganic chemistry , metal–metal bonds describe attractive interactions between metal centers. The simplest examples are found in bimetallic complexes. Metal–metal bonds can be "supported", i.e. be accompanied by one or more bridging ligands , or "unsupported". They can also vary according to bond order. The top... | https://en.wikipedia.org/wiki/Metal–metal_bond |
The metal–nitride–oxide–semiconductor or metal–nitride–oxide–silicon ( MNOS ) transistor is a type of MOSFET (metal–oxide–semiconductor field-effect transistor) in which the oxide layer is replaced by a double layer of nitride and oxide. [ 1 ] It is an alternative and supplement to the existing standard MOS technology ... | https://en.wikipedia.org/wiki/Metal–nitride–oxide–semiconductor_transistor |
Metal–organic biohybrids ( MOBs ) are a family of materials containing a metal component, such as copper, and a biological component, such as the amino acid dimer cystine . [ 1 ] One of the MOB families first described was the copper-high aspect ratio structure called CuHARS. Scanning electron microscopy (SEM) and tran... | https://en.wikipedia.org/wiki/Metal–organic_biohybrid |
Metamagnetism is a sudden (often, dramatic) increase in the magnetization of a material with a small change in an externally applied magnetic field . The metamagnetic behavior may have quite different physical causes for different types of metamagnets. Some examples of physical mechanisms leading to metamagnetic behavi... | https://en.wikipedia.org/wiki/Metamagnetism |
Metaman: The Merging of Humans and Machines into a Global Superorganism is a 1993 book by author Gregory Stock . The title refers to a superorganism comprising humanity and its technology. [ 1 ] [ 2 ]
In his book, Stock claims that the humanity as a whole can be seen as a collective organism which he calls Metaman. H... | https://en.wikipedia.org/wiki/Metaman |
A metamaterial (from the Greek word μετά meta , meaning "beyond" or "after", and the Latin word materia , meaning "matter" or "material") is a type of material engineered to have a property, typically rarely observed in naturally occurring materials, that is derived not from the properties of the base materials but fro... | https://en.wikipedia.org/wiki/Metamaterial |
A metamaterial absorber [ 1 ] is a type of metamaterial intended to efficiently absorb electromagnetic radiation such as light . Furthermore, metamaterials are an advance in materials science . Hence, those metamaterials that are designed to be absorbers offer benefits over conventional absorbers such as further miniat... | https://en.wikipedia.org/wiki/Metamaterial_absorber |
Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized ( electrically small ) antenna systems . [ 1 ] Their purpose, as with any electromagnetic antenna, is to launch energy into free space. However, this class of antenna incorporates metamaterials, which are mater... | https://en.wikipedia.org/wiki/Metamaterial_antenna |
Metamaterial cloaking is the usage of metamaterials in an invisibility cloak . This is accomplished by manipulating the paths traversed by light through a novel optical material. Metamaterials direct and control the propagation and transmission of specified parts of the light spectrum and demonstrate the potential to r... | https://en.wikipedia.org/wiki/Metamaterial_cloaking |
Metamaterials: Physics and Engineering Explorations is a book length introduction to the fundamental research and advancements in electromagnetic composite substances known as electromagnetic metamaterials . The discussion encompasses examination of the physics of metamaterial interactions, the designs, and the perspec... | https://en.wikipedia.org/wiki/Metamaterials:_Physics_and_Engineering_Explorations |
Metamaterials was a quarterly peer-reviewed scientific journal that was established in March 2007. It was published by Elsevier and the founding editor-in-chief was Mikhail Lapine ( Helsinki University of Technology ). [ 1 ] The journal published special issues occasionally. It covered research concerning metamaterials... | https://en.wikipedia.org/wiki/Metamaterials_(journal) |
Metamaterials Handbook is a two-volume handbook on metamaterials edited by Filippo Capolino professor of electrical engineering in University of California . [ 1 ] [ 2 ]
The series is designed to cover all theory and application topics related to electromagnetic metamaterials. Disciplines have combined to study, and d... | https://en.wikipedia.org/wiki/Metamaterials_Handbook |
Metamathematics is the study of mathematics itself using mathematical methods. This study produces metatheories , which are mathematical theories about other mathematical theories. Emphasis on metamathematics (and perhaps the creation of the term itself) owes itself to David Hilbert 's attempt to secure the foundations... | https://en.wikipedia.org/wiki/Metamathematics |
In biology , metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions. [ 1 ] In animals, metameric segments are referred to as somites or metameres ... | https://en.wikipedia.org/wiki/Metamerism_(biology) |
In chemistry , metamerism is used to define the isomeric relationship between compounds with the same polyvalent , heteroatomic , functional group but differ in the main carbon chain or any of the side chains . It has rather been an obsolete term for isomerism, which has not been recognised by IUPAC in its publications... | https://en.wikipedia.org/wiki/Metamerism_(chemistry) |
Metamictisation (sometimes called metamictization or metamiction ) is a natural process resulting in the gradual and ultimately complete destruction of a mineral 's crystal structure , leaving the mineral amorphous . The affected material is therefore described as metamict .
Certain minerals occasionally contain inter... | https://en.wikipedia.org/wiki/Metamictisation |
A metamorphic reaction is a chemical reaction that takes place during the geological process of metamorphism wherein one assemblage of minerals is transformed into a second assemblage which is stable under the new temperature/pressure conditions resulting in the final stable state of the observed metamorphic rock . [ 1... | https://en.wikipedia.org/wiki/Metamorphic_reaction |
Metanil Yellow ( Acid Yellow 36 ) is a dye of the azo class . In analytical chemistry, it is used as a pH indicator and it has a color change from red to yellow between pH 1.2 and 3.2. [ 1 ]
Although illegal for food use, Metanil Yellow has been used as an adulterant in turmeric and pigeon pea based food products, pa... | https://en.wikipedia.org/wiki/Metanil_Yellow |
Metaphenomics [ 1 ] studies the phenome of plants or other organisms by means of meta-analysis. Main goal is to establish dose-response relationships of a wide range of phenotypic traits for a large set of a-biotic environmental factors .
A popular way to study the effect of the environment on plants is to set up expe... | https://en.wikipedia.org/wiki/Metaphenomics |
Metaphocytes are myeloid -like cells considered among tissue-resident macrophages (TRMs) and are present in the skin, gill, and intestine of the zebrafish ( Danio rerio ). Originating from the ectoderm during development, metaphocytes share many similarities, in terms of cellular morphology and gene expression profile ... | https://en.wikipedia.org/wiki/Metaphocyte |
Metaplasia (from Greek ' change in form ' ) is the transformation of a cell type to another cell type. [ 1 ] The change from one type of cell to another may be part of a normal maturation process, or caused by some sort of abnormal stimulus. In simplistic terms, it is as if the original cells are not robust enough to ... | https://en.wikipedia.org/wiki/Metaplasia |
Metaproteomics (also Community Proteomics , Environmental Proteomics , or Community Proteogenomics ) is an umbrella term for experimental approaches to study all proteins in microbial communities and microbiomes from environmental sources. Metaproteomics is used to classify experiments that deal with all proteins ident... | https://en.wikipedia.org/wiki/Metaproteomics |
Metascape is a free gene annotation and analysis resource that helps biologists make sense of one or multiple gene lists. Metascape provides automated meta-analysis tools to understand either common or unique pathways and protein networks within a group of orthogonal target-discovery studies.
In the "OMICs" age, it i... | https://en.wikipedia.org/wiki/Metascape |
Metasilicic acid is a hypothetical chemical compound with formula (HO) 2 SiO . [ 1 ] The free acid slowly polymerises in aqueous solution even at low concentrations and cannot be isolated under normal conditions. Compounds including the conjugate base are known as metasilicates and occur widely in nature as inosilicate... | https://en.wikipedia.org/wiki/Metasilicic_acid |
In electronics , metastability is the ability of a digital electronic system to persist for an unbounded time in an unstable equilibrium or metastable state. [ 1 ] In digital logic circuits, a digital signal is required to be within certain voltage or current limits to represent a '0' or '1' logic level for correct cir... | https://en.wikipedia.org/wiki/Metastability_(electronics) |
In statistical mechanics , the metastate is a probability measure on the
space of all thermodynamic states for a system with quenched randomness. The term metastate, in this context, was first used in by Charles M. Newman and Daniel L. Stein in 1996.. [ 1 ]
Two different versions have been proposed:
1) The Aizenman -... | https://en.wikipedia.org/wiki/Metastate |
A metasyntactic variable is a specific word or set of words identified as a placeholder in computer science and specifically computer programming . These words are commonly found in source code and are intended to be modified or substituted before real-world usage. For example, foo and bar are used in over 330 Internet... | https://en.wikipedia.org/wiki/Metasyntactic_variable |
A metasystem transition is the emergence , through evolution , of a higher level of organization or control .
A metasystem is formed by the integration of a number of initially independent components, such as molecules (as theorized for instance by hypercycles ), cells , or individuals, and the emergence of a system s... | https://en.wikipedia.org/wiki/Metasystem_transition |
In logic , a metatheorem is a statement about a formal system proven in a metalanguage . Unlike theorems proved within a given formal system, a metatheorem is proved within a metatheory , and may reference concepts that are present in the metatheory but not the object theory. [ citation needed ]
A formal system is det... | https://en.wikipedia.org/wiki/Metatheorem |
Metatranscriptomics is the set of techniques used to study gene expression of microbes within natural environments, i.e., the metatranscriptome. [ 1 ]
While metagenomics focuses on studying the genomic content and on identifying which microbes are present within a community, metatranscriptomics can be used to study th... | https://en.wikipedia.org/wiki/Metatranscriptomics |
In logic , a metavariable (also metalinguistic variable [ 1 ] or syntactical variable ) [ 2 ] is a symbol or symbol string which belongs to a metalanguage and stands for elements of some object language. For instance, in the sentence
the symbols A and B are part of the metalanguage in which the statement about the obj... | https://en.wikipedia.org/wiki/Metavariable |
Metcalfe's law states that the financial value or influence of a telecommunications network is proportional to the square of the number of connected users of the system ( n 2 ). The law is named after Robert Metcalfe and was first proposed in 1980, albeit not in terms of users, but rather of "compatible communicating d... | https://en.wikipedia.org/wiki/Metcalfe's_law |
A meteorite is a rock that originated in outer space and has fallen to the surface of a planet or moon . When the original object enters the atmosphere, various factors such as friction , pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate energy. It then becomes a meteor and ... | https://en.wikipedia.org/wiki/Meteorite |
A meteorite fall , also called an observed fall , is a meteorite collected after its fall from outer space , that was also observed by people or automated devices. Any other meteorite is called a " find ". [ 1 ] [ 2 ] There are more than 1,300 documented falls listed in widely used databases, [ 3 ] [ 4 ] [ 5 ] most of ... | https://en.wikipedia.org/wiki/Meteorite_fall |
This award honors members of the Meteoritical Society who have advanced the goals of the Society to promote research and education in meteoritics and planetary science in ways other than by conducting scientific research. [ 1 ] Examples of activities that could be honored by the award include, but are not limited to, e... | https://en.wikipedia.org/wiki/Meteoritical_Society's_Service_Award |
A meteoroid ( / ˈ m iː t i ə r ɔɪ d / MEE -tee-ə-royd ) [ 1 ] is a small rocky or metallic body in outer space .
Meteoroids are distinguished as objects significantly smaller than asteroids , ranging in size from grains to objects up to 1 m (3 ft 3 in) wide. [ 2 ] Objects smaller than meteoroids are classified as micro... | https://en.wikipedia.org/wiki/Meteoroid |
Meteorological intelligence is information measured, gathered, compiled, exploited, analyzed and disseminated by meteorologists , climatologists and hydrologists to characterize the current state and/or predict the future state of the atmosphere at a given location and time. Meteorological intelligence is a subset of ... | https://en.wikipedia.org/wiki/Meteorological_intelligence |
Meteorology is the scientific study of the Earth 's atmosphere and short-term atmospheric phenomena (i.e. weather ), with a focus on weather forecasting . [ 1 ] It has applications in the military , aviation , energy production , transport , agriculture , construction , weather warnings and disaster management .
Along... | https://en.wikipedia.org/wiki/Meteorology |
In physics , the meter water equivalent (often m.w.e. or mwe ) is a standard measure of cosmic ray attenuation in underground laboratories . A laboratory at a depth of 1000 m.w.e is shielded from cosmic rays equivalently to a lab 1,000 m (3,300 ft) below the surface of a body of water. Because laboratories at the same ... | https://en.wikipedia.org/wiki/Meter_water_equivalent |
A metering pump moves a precise volume of liquid in a specified time period providing an accurate volumetric flow rate . [ 1 ] Delivery of fluids in precise adjustable flow rates is sometimes called metering . The term "metering pump" is based on the application or use rather than the exact kind of pump used, although... | https://en.wikipedia.org/wiki/Metering_pump |
MethBase is a database of DNA methylation data derived from next-generation sequencing data. [ 1 ] MethBase provides a visualization of publicly available bisulfite sequencing and reduced representation bisulfite sequencing experiments through the UCSC Genome Browser . MethBase contents include single- CpG site resolu... | https://en.wikipedia.org/wiki/MethBase |
Methanandamide ( AM-356 ) is a synthetically created stable chiral analog of anandamide . [ 1 ] Its effects have been observed to act on the cannabinoid receptors (specifically on CB 1 receptors, which are part of the central nervous system ) found in different organisms such as mammals, fish, and certain invertebrates... | https://en.wikipedia.org/wiki/Methanandamide |
Methanation is the conversion of carbon monoxide and carbon dioxide (CO x ) to methane (CH 4 ) through hydrogenation . The methanation reactions of CO x were first discovered by Sabatier and Senderens in 1902. [ 1 ]
CO x methanation has many practical applications. It is a means of carbon oxide removal from process ga... | https://en.wikipedia.org/wiki/Methanation |
Methane ( US : / ˈ m ɛ θ eɪ n / METH -ayn , UK : / ˈ m iː θ eɪ n / MEE -thayn ) is a chemical compound with the chemical formula CH 4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride , the simplest alkane , and the main constituent of natural gas . The abundance of methane on Earth makes it an ... | https://en.wikipedia.org/wiki/Methane |
This page provides supplementary chemical data on methane .
The handling of this chemical may incur notable safety precautions. [ 1 ]
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed. Annotation "(s)" indicates equilibrium temperature of vapor over solid. Otherwise temperature is equilibrium of ... | https://en.wikipedia.org/wiki/Methane_(data_page) |
Methane functionalization is the process of converting methane in its gaseous state to another molecule with a functional group , typically methanol or acetic acid , through the use of transition metal catalysts .
In the realm of carbon-hydrogen bond activation and functionalization (C-H activation/functionalization),... | https://en.wikipedia.org/wiki/Methane_functionalization |
A methane leak is a significant natural gas leak. The term is used for a class of methane emissions , which can come from an industrial facility or pipeline.
Satellite data enables the identification of super-emitter events (synonymous with ultra-emitters, see "Mitigation of Ultra-Emitters") that produce methane plume... | https://en.wikipedia.org/wiki/Methane_leak |
A methane reformer is a device based on steam reforming , autothermal reforming or partial oxidation and is a type of chemical synthesis which can produce pure hydrogen gas from methane using a catalyst . There are multiple types of reformers in development but the most common in industry are autothermal reforming (ATR... | https://en.wikipedia.org/wiki/Methane_reformer |
Methanediol , also known as formaldehyde monohydrate or methylene glycol , is an organic compound with chemical formula CH 2 (OH) 2 . It is the simplest geminal diol . In aqueous solutions it coexists with oligomers (short polymers). The compound is closely related and convertible to the industrially significant deriva... | https://en.wikipedia.org/wiki/Methanediol |
Methanedithiol is an organosulfur compound with the formula H 2 C(SH) 2 . A seldom used chemical, it forms when formaldehyde reacts with hydrogen sulfide under pressure:
This reaction competes with formation of trithiane :
Methanedithiol forms a solid dibenzoate derivative upon treatment with benzoic anhydride : [ 1 ... | https://en.wikipedia.org/wiki/Methanedithiol |
Methanesulfonic acid ( MsOH , MSA ) or methanesulphonic acid (in British English) is an organosulfuric , colorless liquid with the molecular formula CH 3 SO 3 H and structure H 3 C − S(=O) 2 − OH . It is the simplest of the alkylsulfonic acids ( R−S(=O) 2 −OH ). Salts and esters of methanesulfonic acid are known as mes... | https://en.wikipedia.org/wiki/Methanesulfonic_acid |
Methanesulfonic anhydride ( Ms 2 O ) is the acid anhydride of methanesulfonic acid . Like methanesulfonyl chloride (MsCl), it may be used to generate mesylates (methanesulfonyl esters).
Ms 2 O may be prepared by the dehydration of methanesulfonic acid with phosphorus pentoxide . [ 2 ]
Ms 2 O can be purified by distil... | https://en.wikipedia.org/wiki/Methanesulfonic_anhydride |
Methanesulfonyl chloride ( mesyl chloride ) is an organosulfur compound with the formula CH 3 SO 2 Cl . Using the organic pseudoelement symbol Ms for the methanesulfonyl (or mesyl) group CH 3 SO 2 –, it is frequently abbreviated MsCl in reaction schemes or equations. It is a colourless liquid that dissolves in polar or... | https://en.wikipedia.org/wiki/Methanesulfonyl_chloride |
Methanobactin (mb) is a class of copper-binding and reducing chromophoric peptides initially identified in the methanotroph Methylococcus capsulatus Bath - and later in Methylosinus trichosporium OB3b - during the isolation of the membrane-associated or particulate methane monooxygenase (pMMO). [ 1 ] It is thought to b... | https://en.wikipedia.org/wiki/Methanobactin |
Methanogens are anaerobic archaea that produce methane as a byproduct of their energy metabolism , i.e., catabolism . Methane production, or methanogenesis , is the only biochemical pathway for ATP generation in methanogens. All known methanogens belong exclusively to the domain Archaea, although some bacteria , plants... | https://en.wikipedia.org/wiki/Methanogen |
Methanogens are a group of microorganisms that produce methane as a byproduct of their metabolism. They play an important role in the digestive system of ruminants . The digestive tract of ruminants contains four major parts: rumen , reticulum , omasum and abomasum . The food with saliva first passes to the rumen for b... | https://en.wikipedia.org/wiki/Methanogens_in_digestive_tract_of_ruminants |
This page provides supplementary chemical data on methanol .
The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the Safety Datasheet ( SDS ) for this chemical from a reliable source such as SIRI , and follow its directions. SDS is available at MSDS , J.T. Baker a... | https://en.wikipedia.org/wiki/Methanol_(data_page) |
The methanol economy is a suggested future economy in which methanol and dimethyl ether replace fossil fuels as a means of energy storage , ground transportation fuel, and raw material for synthetic hydrocarbons and their products. It offers an alternative to the proposed hydrogen economy or ethanol economy , although ... | https://en.wikipedia.org/wiki/Methanol_economy |
A methanol reformer is a device used in chemical engineering , especially in the area of fuel cell technology, which can produce pure hydrogen gas and carbon dioxide by reacting a methanol and water (steam) mixture.
Methanol is transformed into hydrogen and carbon dioxide by pressure and heat and interaction with a ca... | https://en.wikipedia.org/wiki/Methanol_reformer |
Gas to liquids ( GTL ) is a refinery process to convert natural gas or other gaseous hydrocarbons into longer-chain hydrocarbons, such as gasoline or diesel fuel . Methane -rich gases are converted into liquid synthetic fuels . Two general strategies exist: (i) direct partial combustion of methane to methanol and (ii) ... | https://en.wikipedia.org/wiki/Methanol_to_gasoline |
Methanol toxicity (also methanol poisoning ) is poisoning from methanol , characteristically via ingestion. [ 1 ] Symptoms may include an altered/decreased level of consciousness , poor or no coordination, vomiting , abdominal pain , and a specific smell on the breath. [ 1 ] [ 2 ] Decreased vision may start as early as... | https://en.wikipedia.org/wiki/Methanol_toxicity |
A methanometer is an instrument used to measure methane gas in the air of a mine. The Mine Safety Appliances Company Ltd. manufactured the first type - W8 Methanometer around 1950 and it was approved for use by the Ventilation Regulations of 1947. The Methanometer could be powered by an Edison battery cap lamp and it ... | https://en.wikipedia.org/wiki/Methanometer |
Methanosarcina acetivorans is a versatile methane producing microbe which is found in such diverse environments as oil wells, trash dumps, deep-sea hydrothermal vents, and oxygen-depleted sediments beneath kelp beds. Only M. acetivorans and microbes in the genus Methanosarcina use all three known metabolic pathways fo... | https://en.wikipedia.org/wiki/Methanosarcina_acetivorans |
Methemoglobin (British: methaemoglobin , shortened MetHb ) (pronounced "met-hemoglobin") is a hemoglobin in the form of metalloprotein , in which the iron in the heme group is in the Fe 3+ ( ferric ) state, not the Fe 2+ ( ferrous ) of normal hemoglobin. Sometimes, it is also referred to as ferrihemoglobin. [ 2 ] Methe... | https://en.wikipedia.org/wiki/Methemoglobin |
In organic chemistry , methenium (also called methylium , carbenium , [ 2 ] methyl cation , or protonated methylene ) is a cation with the formula CH + 3 . It can be viewed as a methylene radical ( : CH 2 ) with an added proton ( H + ), or as a methyl radical (• CH 3 ) with one electron removed. It is a carbocation and... | https://en.wikipedia.org/wiki/Methenium |
In organic chemistry , a methine group or methine bridge is a trivalent functional group =CH− , derived formally from methane . It consists of a carbon atom bound by two single bonds and one double bond , where one of the single bonds is to a hydrogen . The group is also called methyne or methene , but its IUPAC system... | https://en.wikipedia.org/wiki/Methine_group |
Methiocarb is a carbamate pesticide (an acetylcholinesterase inhibitor ) which is used as an insecticide , [ 1 ] [ 2 ] bird repellent , [ 3 ] acaricide [ 2 ] and molluscicide [ 2 ] since the 1960s. Methiocarb has contact and stomach action on mites and neurotoxic effects on molluscs . Seeds treated with methiocarb also... | https://en.wikipedia.org/wiki/Methiocarb |
In organic chemistry, a methiodide is a chemical derivative produced by the reaction of a compound with methyl iodide . Methiodides are often formed through the methylation of tertiary amines :
Whereas the parent amines are hydrophobic and often oily, methiodides, being salts, are somewhat hydrophilic and exhibit hig... | https://en.wikipedia.org/wiki/Methiodide |
Methionine sulfoxide is the organic compound with the formula CH 3 S(O)CH 2 CH 2 CH(NH 2 )CO 2 H. It is an amino acid that occurs naturally although it is formed post-translationally .
Oxidation of the sulfur of methionine results in methionine sulfoxide or methionine sulfone. The sulfur-containing amino acids methio... | https://en.wikipedia.org/wiki/Methionine_sulfoxide |
Method of Fluxions ( Latin : De Methodis Serierum et Fluxionum ) [ 1 ] is a mathematical treatise by Sir Isaac Newton which served as the earliest written formulation of modern calculus . The book was completed in 1671 and posthumously published in 1736. [ 2 ]
Fluxion is Newton's term for a derivative . He originally ... | https://en.wikipedia.org/wiki/Method_of_Fluxions |
In proof theory , the semantic tableau [ 1 ] ( / t æ ˈ b l oʊ , ˈ t æ b l oʊ / ; plural: tableaux ), also called an analytic tableau , [ 2 ] truth tree , [ 1 ] or simply tree , [ 2 ] is a decision procedure for sentential and related logics, and a proof procedure for formulae of first-order logic . [ 1 ] An analytic ta... | https://en.wikipedia.org/wiki/Method_of_analytic_tableaux |
In mathematics , more specifically in dynamical systems , the method of averaging (also called averaging theory) exploits systems containing time-scales separation: a fast oscillation versus a slow drift . It suggests that we perform an averaging over a given amount of time in order to iron out the fast oscillations an... | https://en.wikipedia.org/wiki/Method_of_averaging |
The method of continued fractions is a method developed specifically for solution of integral equations of quantum scattering theory like Lippmann–Schwinger equation or Faddeev equations . It was invented by Horáček and Sasakawa [ 1 ] in 1983. The goal of the method is to solve the integral equation
iteratively and to... | https://en.wikipedia.org/wiki/Method_of_continued_fractions |
In the mathematical field of enumerative combinatorics , identities are sometimes established by arguments that rely on singling out one "distinguished element" of a set.
Let A {\displaystyle {\mathcal {A}}} be a family of subsets of the set A {\displaystyle A} and let x ∈ A {\displaystyle x\in A} be a distinguished e... | https://en.wikipedia.org/wiki/Method_of_distinguished_element |
In mathematics, the method of dominant balance approximates the solution to an equation
by solving a simplified form of the equation containing 2 or more of the equation's terms that most influence (dominate) the solution and excluding terms contributing only small modifications to this approximate solution. Following... | https://en.wikipedia.org/wiki/Method_of_dominant_balance |
The method of exhaustion ( Latin : methodus exhaustionis ) is a method of finding the area of a shape by inscribing inside it a sequence of polygons (one at a time) whose areas converge to the area of the containing shape . If the sequence is correctly constructed, the difference in area between the n th polygon and th... | https://en.wikipedia.org/wiki/Method_of_exhaustion |
The method of images (or method of mirror images ) is a mathematical tool for solving differential equations , in which boundary conditions are satisfied by combining a solution not restricted by the boundary conditions with its possibly weighted mirror image. Generally, original singularities are inside the domain of... | https://en.wikipedia.org/wiki/Method_of_images |
In mathematics , the method of matched asymptotic expansions [ 1 ] is a common approach to finding an accurate approximation to the solution to an equation , or system of equations . It is particularly used when solving singularly perturbed differential equations . It involves finding several different approximate solu... | https://en.wikipedia.org/wiki/Method_of_matched_asymptotic_expansions |
In applied mathematics, methods of mean weighted residuals (MWR) are methods for solving differential equations . The solutions of these differential equations are assumed to be well approximated by a finite sum of test functions ϕ i {\displaystyle \phi _{i}} . In such cases, the selected method of weighted residuals... | https://en.wikipedia.org/wiki/Method_of_mean_weighted_residuals |
In calculus , the method of normals was a technique invented by Descartes for finding normal and tangent lines to curves . It represented one of the earliest methods for constructing tangents to curves. The method hinges on the observation that the radius of a circle is always normal to the circle itself. With this ... | https://en.wikipedia.org/wiki/Method_of_normals |
Methods engineering is a subspecialty of industrial engineering and manufacturing engineering concerned with human integration in industrial production processes. [ 1 ]
Alternatively it can be described as the design of the productive process in which a person is involved. The task of the Methods engineer is to decide... | https://en.wikipedia.org/wiki/Methods_engineering |
There are many methods to investigate protein–protein interactions which are the physical contacts of high specificity established between two or more protein molecules involving electrostatic forces and hydrophobic effects . Each of the approaches has its own strengths and weaknesses, especially with regard to the sen... | https://en.wikipedia.org/wiki/Methods_to_investigate_protein–protein_interactions |
Methomyl is a carbamate insecticide introduced in 1966. It is highly toxic to humans, livestock, pets, and wildlife. [ 3 ] The EU imposed a pesticide residue limit of 0,01 mg/kg for all fruit and vegetables. [ 4 ]
Methomyl is a common active ingredient in commercial fly bait, for which the label instructions in the U... | https://en.wikipedia.org/wiki/Methomyl |
In chemistry , an alkoxide is the conjugate base of an alcohol and therefore consists of an organic group bonded to a negatively charged oxygen atom. They are written as RO − , where R is the organyl substituent . Alkoxides are strong bases [ citation needed ] and, when R is not bulky , good nucleophiles and good lig... | https://en.wikipedia.org/wiki/Methoxide |
Methoxy arachidonyl fluorophosphonate , commonly referred as MAFP , is an irreversible active site-directed enzyme inhibitor that inhibits nearly all serine hydrolases and serine proteases . [ 1 ] It inhibits phospholipase A2 and fatty acid amide hydrolase with special potency, displaying IC 50 values in the low-nanomo... | https://en.wikipedia.org/wiki/Methoxy_arachidonyl_fluorophosphonate |
Methoxychlor is a synthetic organochloride insecticide , now obsolete. Tradenames for methoxychlor include Chemform , Maralate , Methoxo , Methoxcide , Metox , and Moxie .
Methoxychlor was used to protect crops, ornamentals, livestock, and pets against fleas, mosquitoes, cockroaches, and other insects. It was intended... | https://en.wikipedia.org/wiki/Methoxychlor |
Methyl- n -amylnitrosamine (MNAN) is a potential carcinogen [ 1 ] It is metabolized in the liver by the enzyme CYP2A6 .
This article about an organic compound is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Methyl-n-amylnitrosamine |
Methyl azide is an organic compound with the formula CH 3 N 3 . It is a white solid and it is the simplest organic azide .
Methyl azide can be prepared by the methylation of sodium azide , for instance with dimethyl sulfate in alkaline solution, followed by passing through a tube of anhydrous calcium chloride or sodiu... | https://en.wikipedia.org/wiki/Methyl_azide |
Methyl chlorate is a hypothetical organic compound having a chemical formula CH 3 ClO 3 . It would be a methyl ester of chloric acid if it existed. Attempts to synthesize it failed. [ 2 ] No physical properties are known. [ 3 ]
This article about chemical compounds is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Methyl_chlorate |
Methyl chloroformate is a chemical compound with the chemical formula Cl−C(=O)−O−CH 3 . It is the methyl ester of chloroformic acid . It is an oily colorless liquid, although aged samples appear yellow. It is also known for its pungent odor.
Methyl chloroformate can be synthesized using anhydrous methanol and phosgene... | https://en.wikipedia.org/wiki/Methyl_chloroformate |
Methyl cyanoformate is the organic compound with the formula CH 3 OC(O)CN. It is used as a reagent in organic synthesis as a source of the methoxycarbonyl group, [ 1 ] in which context it is also known as Mander's reagent. When a lithium enolate is generated in diethyl ether or methyl t -butyl ether, treatment with M... | https://en.wikipedia.org/wiki/Methyl_cyanoformate |
Methyl fluoroacetate ( MFA ) is an organic compound with the chemical formula F C H 2 C O 2 CH 3 . It is the extremely toxic methyl ester of fluoroacetic acid . It is a colorless, odorless liquid at room temperature. It is used as a laboratory chemical and as a rodenticide . Because of its extreme toxicity, MFA was stu... | https://en.wikipedia.org/wiki/Methyl_fluoroacetate |
Methyl green (CI 42585) is a cationic or positive charged stain related to Ethyl Green that has been used for staining DNA since the 19th century. [ 1 ] It has been used for staining cell nuclei either as a part of the classical Unna-Pappenheim stain or as a nuclear counterstain ever since. In recent years, its fluores... | https://en.wikipedia.org/wiki/Methyl_green |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.