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Metabolic trapping refers to a localization mechanism of synthesized radiocompounds in the human body. It can be defined as the intracellular accumulation of a radioactive tracer based on the relative metabolic activity of the body's tissues . [ 1 ] It is a basic principle of the design of radiopharmaceuticals as metab... | https://en.wikipedia.org/wiki/Metabolic_trapping |
Metabolic wastes or excrements are substances left over from metabolic processes (such as cellular respiration ) which cannot be used by the organism (they are surplus or toxic ), and must therefore be excreted . This includes nitrogen compounds, water , CO 2 , phosphates , sulphates , etc. Animals treat these compound... | https://en.wikipedia.org/wiki/Metabolic_waste |
Metabolic water refers to water created inside a living organism through metabolism , by oxidizing energy-containing substances in food and adipose tissue. Animal metabolism produces about 107–110 grams of water per 100 grams of fat , [ 1 ] 41–42 grams of water per 100 g of protein , and 60 grams of water per 100 g of... | https://en.wikipedia.org/wiki/Metabolic_water |
Metabolism: Clinical and Experimental is a monthly peer-reviewed medical journal covering all aspects of human metabolism . It was established in 1952 and is published by Elsevier . [ 1 ] The editor-in-chief is Christos Socrates Mantzoros ( Harvard Medical School ) who has reinvigorated the journal during his tenure.
... | https://en.wikipedia.org/wiki/Metabolism:_Clinical_and_Experimental |
Metabolite damage can occur through enzyme promiscuity or spontaneous chemical reactions. Many metabolites are chemically reactive and unstable and can react with other cell components or undergo unwanted modifications. Enzymatically or chemically damaged metabolites are always useless and often toxic. To prevent toxic... | https://en.wikipedia.org/wiki/Metabolite_damage |
Metabolite pool is a collective term for all of the substances involved in the metabolic process in a biological system .
Metabolic pools are within cells (or organelles such as chloroplasts ) and refer to the reservoir of molecules upon which enzymes can operate. The size of the reservoir is referred to as its "metabo... | https://en.wikipedia.org/wiki/Metabolite_pool |
The metabolome refers to the complete set of small-molecule chemicals found within a biological sample. [ 1 ] The biological sample can be a cell , a cellular organelle , an organ , a tissue , a tissue extract, a biofluid or an entire organism . The small molecule chemicals found in a given metabolome may include both ... | https://en.wikipedia.org/wiki/Metabolome |
Metabolomics is the scientific study of chemical processes involving metabolites , the small molecule substrates, intermediates, and products of cell metabolism . Specifically, metabolomics is the "systematic study of the unique chemical fingerprints that specific cellular processes leave behind", the study of their sm... | https://en.wikipedia.org/wiki/Metabolomics |
In biochemistry , a metabolon is a temporary structural-functional complex formed between sequential enzymes of a metabolic pathway , held together both by non-covalent interactions and by structural elements of the cell, such as integral membrane proteins and proteins of the cytoskeleton .
The formation of metabolons... | https://en.wikipedia.org/wiki/Metabolon |
A metaborate is a borate anion consisting of boron and oxygen , with empirical formula BO − 2 . Metaborate also refers to any salt or ester of such anion (e.g. salts such as sodium metaborate NaBO 2 or calcium metaborate Ca(BO 2 ) 2 , and esters such as methyl metaborate CH 3 BO 2 ). Metaborate is one of the boron's ox... | https://en.wikipedia.org/wiki/Metaborate |
A metabotropic receptor , also referred to by the broader term G-protein-coupled receptor , [ 1 ] is a type of membrane receptor that initiates a number of metabolic steps to modulate cell activity. The nervous system utilizes two types of receptors : metabotropic and ionotropic receptors. While ionotropic receptors fo... | https://en.wikipedia.org/wiki/Metabotropic_receptor |
Metachirality is a stronger form of chirality .
It applies to objects or systems that are chiral (not identical to their mirror image ) and where, in addition, their mirror image has a symmetry group that differs from the symmetry group of the original object or system. [ 1 ]
Many familiar chiral objects, like the cap... | https://en.wikipedia.org/wiki/Metachirality |
An ecological metacommunity is a set of interacting communities which are linked by the dispersal of multiple, potentially interacting species. [ 1 ] [ 2 ] [ 3 ] The term is derived from the field of community ecology , which is primarily concerned with patterns of species distribution, abundance and interactions. Meta... | https://en.wikipedia.org/wiki/Metacommunity |
Metacresol purple or m -cresol purple , also called m -cresolsulfonphthalein , is a triarylmethane dye and a pH indicator . It is used as a capnographic indicator for detecting detect end-tidal carbon dioxide to ensure successful tracheal intubation in an emergency. [ 1 ] [ 2 ] It can be used to measure the pH in subze... | https://en.wikipedia.org/wiki/Metacresol_purple |
Metadata controller (or MDC) is a storage area network (SAN) technology for managing file locking , space allocation and data access authorization.
This is needed when several clients are given block level access to the same disk volume, data storage sharing.
MDCs are only used on high-end servers. These are never fou... | https://en.wikipedia.org/wiki/Metadata_controller |
Metadynamics (MTD; also abbreviated as METAD or MetaD) is a computer simulation method in computational physics , chemistry and biology . It is used to estimate the free energy and other state functions of a system , where ergodicity is hindered by the form of the system's energy landscape . It was first suggested by A... | https://en.wikipedia.org/wiki/Metadynamics |
A metagame , broadly defined as "a game beyond the game", typically refers to either of two concepts: a game which revolves around a core game; or the strategies and approaches to playing a game. [ 1 ] A metagame can serve a broad range of purposes, and may be tied to the way a game relates to various aspects of life. ... | https://en.wikipedia.org/wiki/Metagame |
Metagame analysis involves framing a problem situation as a strategic game in which participants try to realise their objectives by means of the options available to them. The subsequent meta-analysis of this game gives insight in possible strategies and their outcome.
Metagame theory was developed by Nigel Howard in ... | https://en.wikipedia.org/wiki/Metagame_analysis |
The word metagenics uses the prefix meta and the suffix gen . Literally, it means "the creation of something which creates". In the context of biotechnology, metagenics is the practice of engineering organisms to create a specific enzyme, protein, or other biochemicals from simpler starting materials. The genetic engin... | https://en.wikipedia.org/wiki/Metagenics |
In chemistry, metal-catalysed hydroboration is a reaction used in organic synthesis . It is one of several examples of homogeneous catalysis .
In 1975, Kono and Ito reported that Wilkinson's catalyst (Rh(PPh 3 ) 3 Cl) can undergo oxidative addition with catecholborane (HBcat) or 4,4,6-trimethyl-1,3,2-dioxaborinane. [... | https://en.wikipedia.org/wiki/Metal-catalysed_hydroboration |
Metal-catalyzed cyclopropanations are chemical reactions that result in the formation of a cyclopropane ring from a metal carbenoid species and an alkene . [ 1 ] In the Simmons–Smith reaction the metal involved is zinc. Metal carbenoid species can be generated through the reaction of a diazo compound with a transition ... | https://en.wikipedia.org/wiki/Metal-catalyzed_cyclopropanations |
A metal-centered cycloaddition is a subtype of the more general class of cycloaddition reactions . In such reactions "two or more unsaturated molecules unite directly to form a ring", [ 1 ] incorporating a metal bonded to one or more of the molecules. Cycloadditions involving metal centers are a staple of organic and o... | https://en.wikipedia.org/wiki/Metal-centered_cycloaddition_reactions |
Metal-coded affinity tag is a method used for quantitative proteomics by mass spectrometry that uses a metal chelate complex 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate (DOTA) coupled to different lanthanide ions. [ 1 ] [ 2 ] The metal complexes attach to the cysteine residues of proteins in a sample.
For bot... | https://en.wikipedia.org/wiki/Metal-coded_affinity_tag |
Combined with certain metallic species, amorphous films can crystallize in a process known as metal-induced crystallization (MIC). The effect was discovered in 1969, when amorphous germanium (a-Ge) films crystallized at surprisingly low temperatures when in contact with Al, Ag, Cu, or Sn. [ 1 ] The effect was also veri... | https://en.wikipedia.org/wiki/Metal-induced_crystallization |
Metal-induced embrittlement (MIE) is the embrittlement caused by diffusion of metal, either solid or liquid, into the base material. Metal induced embrittlement occurs when metals are in contact with low-melting point metals while under tensile stress. The embrittler can be either solid ( SMIE ) or liquid ( liquid meta... | https://en.wikipedia.org/wiki/Metal-induced_embrittlement |
Metal-ligand cooperativity (MLC) is a mode of reactivity in which a metal and ligand of a complex are both involved in the bond breaking or bond formation of a substrate during the course of a reaction. This ligand is an actor ligand rather than a spectator , and the reaction is generally only deemed to contain MLC if ... | https://en.wikipedia.org/wiki/Metal-ligand_cooperativity |
A metal-phosphine complex is a coordination complex containing one or more phosphine ligands. Almost always, the phosphine is an organophosphine of the type R 3 P (R = alkyl, aryl). Metal phosphine complexes are useful in homogeneous catalysis . [ 1 ] [ 2 ] Prominent examples of metal phosphine complexes include Wilk... | https://en.wikipedia.org/wiki/Metal-phosphine_complex |
Metal L-edge spectroscopy is a spectroscopic technique used to study the electronic structures of transition metal atoms and complexes . This method measures X-ray absorption caused by the excitation of a metal 2p electron to unfilled d orbitals (e.g. 3d for first-row transition metals), which creates a characteristic ... | https://en.wikipedia.org/wiki/Metal_L-edge |
The report Metal Stocks in Society: Scientific Synthesis [ 1 ] was the first of six scientific assessments on global metals to be published by the International Resource Panel (IRP) of the United Nations Environment Programme . The IRP provides independent scientific assessments and expert advice on a variety of areas,... | https://en.wikipedia.org/wiki/Metal_Stocks_in_Society_report |
Metal allergies inflame the skin after it has been in contact with metal. They are a form of allergic contact dermatitis . They are becoming more common, as of 2021 [update] , except in areas with regulatory countermeasures.
People may become sensitized to certain metals by skin contact, usually by wearing or holding ... | https://en.wikipedia.org/wiki/Metal_allergy |
Metal amides (systematic name metal azanides ) are a class of coordination compounds composed of a metal center with amide ligands of the form NR 2 − . Amido complexes of the parent amido ligand NH 2 − are rare compared to complexes with diorganylamido ligand, such as dimethylamido. Amide ligands have two electron pair... | https://en.wikipedia.org/wiki/Metal_amides |
In chemistry , metal aquo complexes are coordination compounds containing metal ions with only water as a ligand . These complexes are the predominant species in aqueous solutions of many metal salts , such as metal nitrates , sulfates , and perchlorates . They have the general stoichiometry [M(H 2 O) n ] z + . Their ... | https://en.wikipedia.org/wiki/Metal_aquo_complex |
Metal aromaticity or metalloaromaticity is the concept of aromaticity , found in many organic compounds , extended to metals and metal-containing compounds. [ 1 ] The first experimental evidence for the existence of aromaticity in metals was found in aluminium cluster compounds of the type MAl − 4 where M stands for li... | https://en.wikipedia.org/wiki/Metal_aromaticity |
Metal bellows are elastic vessels that can be compressed when pressure is applied to the outside of the vessel, or extended under vacuum. When the pressure or vacuum is released, the bellows will return to its original shape, provided the material has not been stressed past its yield strength . They are used both for t... | https://en.wikipedia.org/wiki/Metal_bellows |
A metal carbido complex is a coordination complex that contains a carbon atom as a ligand . They are analogous to metal nitrido complexes . Carbido complexes are a molecular subclass of carbides , which are prevalent in organometallic and inorganic chemistry. Carbido complexes represent models for intermediates in Fisc... | https://en.wikipedia.org/wiki/Metal_carbido_complex |
Metal carbon dioxide complexes are coordination complexes that contain carbon dioxide ligands . Aside from the fundamental interest in the coordination chemistry of simple molecules, studies in this field are motivated by the possibility that transition metals might catalyze useful transformations of CO 2 . This resear... | https://en.wikipedia.org/wiki/Metal_carbon_dioxide_complex |
Metal carbonyls are coordination complexes of transition metals with carbon monoxide ligands . Metal carbonyls are useful in organic synthesis and as catalysts or catalyst precursors in homogeneous catalysis , such as hydroformylation and Reppe chemistry . In the Mond process , nickel tetracarbonyl is used to produce p... | https://en.wikipedia.org/wiki/Metal_carbonyl |
In chemistry , a metal carbonyl cluster is a compound that contains two or more metal atoms linked in part by metal–metal bonds and containing carbon monoxide (CO) as the exclusive or predominant ligand. The area is a subfield of metal carbonyl chemistry, and many metal carbonyl clusters are in fact prepared from simpl... | https://en.wikipedia.org/wiki/Metal_carbonyl_cluster |
Metal carbonyl hydrides are complexes of transition metals with carbon monoxide and hydride as ligands . These complexes are useful in organic synthesis as catalysts in homogeneous catalysis , such as hydroformylation . [ 1 ]
Walter Hieber et al. prepared the first metal carbonyl hydride in 1931 by the so-called Hiebe... | https://en.wikipedia.org/wiki/Metal_carbonyl_hydride |
In metalworking and jewelry making, casting is a process in which a liquid metal is delivered into a mold (usually by a crucible ) that contains a negative impression (i.e., a three-dimensional negative image) of the intended shape. The metal is poured into the mold through a hollow channel called a sprue . The metal a... | https://en.wikipedia.org/wiki/Metal_casting |
Casting process simulation is a computational technique used in industry and metallurgy to model and analyze the metal-casting process . This technology allows engineers to predict and visualize the flow of molten metal, crystallization patterns, and potential defects in the casting before the start of the actual produ... | https://en.wikipedia.org/wiki/Metal_casting_simulation |
Metal cluster compounds are a molecular ion or neutral compound composed of three or more metals and featuring significant metal-metal interactions. [ 2 ]
The development of metal carbonyl clusters such as Ni(CO) 4 and Fe(CO) 5 led quickly to the isolation of Fe 2 (CO) 9 and Fe 3 (CO) 12 . Rundle and Dahl discovered ... | https://en.wikipedia.org/wiki/Metal_cluster_compound |
Metal dusting is "a catastrophic form of corrosion that occurs when susceptible materials are exposed to environments with high carbon activities." [ 1 ] The corrosion manifests itself as a break-up of bulk metal to metal powder. The suspected mechanism is firstly the deposition of a graphite layer on the surface of th... | https://en.wikipedia.org/wiki/Metal_dusting |
Metal expansion joints (also called compensators ) are compensating elements for thermal expansion and relative movement in pipelines, containers and machines. They consist of one or more metal bellows , connectors at both ends, and tie rods that depend on the application. They are differentiated according to the three... | https://en.wikipedia.org/wiki/Metal_expansion_joint |
In materials science , a metal foam is a material or structure consisting of a solid metal (frequently aluminium ) with gas-filled pores comprising a large portion of the volume . The pores can be sealed (closed-cell foam ) or interconnected (open-cell foam). [ 1 ] The defining characteristic of metal foams is a high p... | https://en.wikipedia.org/wiki/Metal_foam |
Metal halides are compounds between metals and halogens . Some, such as sodium chloride are ionic , while others are covalently bonded . A few metal halides are discrete molecules, such as uranium hexafluoride , but most adopt polymeric structures, such as palladium chloride . [ 1 ] [ 2 ]
The halogens can all react wi... | https://en.wikipedia.org/wiki/Metal_halides |
A metal hose is a flexible metal line element. There are two basic types of metal hose that differ in their design and application: stripwound hoses and corrugated hoses.
Stripwound hoses have a high mechanical strength (e.g. tensile strength and tear strength). Corrugated hoses can withstand high pressure and provide... | https://en.wikipedia.org/wiki/Metal_hose |
In chemistry , metal hydroxides are a family of compounds of the form M n + (OH) n , where M is a metal . They consist of hydroxide ( OH − ) anions and metallic cations , [ 1 ] and are often strong bases . Some metal hydroxides, such as alkali metal hydroxides, ionize completely when dissolved . Certain metal hydroxid... | https://en.wikipedia.org/wiki/Metal_hydroxide |
A metal-ion buffer provides a controlled source of free metal ions in a manner similar to the regulation of hydrogen ion concentration by a pH buffer [ 1 ] A metal-ion buffer solution contains the free (hydrated) metal ion along with a complex compound formed by the association of the ion with a ligand in excess. The c... | https://en.wikipedia.org/wiki/Metal_ion_buffer |
Metal nitrido complexes are coordination compounds and metal clusters that contain an atom of nitrogen bound only to transition metals. These compounds are molecular , i.e. discrete in contrast to the polymeric, dense nitride materials that are useful in materials science . [ 1 ] The distinction between the molecular ... | https://en.wikipedia.org/wiki/Metal_nitrido_complex |
Metal nitrosyl complexes are complexes that contain nitric oxide , NO, bonded to a transition metal . [ 2 ] Many kinds of nitrosyl complexes are known, which vary both in structure and co ligand .
Most complexes containing the NO ligand can be viewed as derivatives of the nitrosyl cation, NO + . The nitrosyl cation is... | https://en.wikipedia.org/wiki/Metal_nitrosyl_complex |
Metal organic cages or MOCs, are "discrete molecular assemblies with nanoscale dimensions, formed through the self-assembly of metal ions or clusters and organic ligands via coordination" [ 1 ] Metal organic polyhedra and Metal Organic Cages have some similarities, but the main difference is indicated by "Such high-sym... | https://en.wikipedia.org/wiki/Metal_organic_cages |
Metal powder is a metal that has been broken down into a powder form. Metals that can be found in powder form include aluminium powder , nickel powder, iron powder and many more. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] There are four different ways metals can be broken down into this powder form: [ 6 ]
The following processes c... | https://en.wikipedia.org/wiki/Metal_powder |
Metal profile sheet systems are used to build cost efficient and reliable envelopes of mostly commercial buildings. They have evolved from the single skin metal cladding often associated with agricultural buildings to multi-layer systems for industrial and leisure application. As with most construction components, the ... | https://en.wikipedia.org/wiki/Metal_profiles |
A metal salen complex is a coordination compound between a metal cation and a ligand derived from N , N ′-bis(salicylidene)ethylenediamine , commonly called salen. The classical example is salcomine , the complex with divalent cobalt Co 2+ , usually denoted as Co(salen). [ 1 ] These complexes are widely investigated as... | https://en.wikipedia.org/wiki/Metal_salen_complex |
In organometallic chemistry , metal sulfur dioxide complexes are complexes that contain sulfur dioxide , SO 2 , bonded to a transition metal . [ 1 ] Such compounds are common but are mainly of theoretical interest. Historically, the study of these compounds has provided insights into the mechanisms of migratory insert... | https://en.wikipedia.org/wiki/Metal_sulfur_dioxide_complex |
Metal toxicity or metal poisoning is the toxic effect of certain metals that accumulate in the environment and damage ecosystems , plants and animals, including human health. [ 1 ] [ 2 ] [ 3 ] Environmental pollution with heavy metals can result in contamination of drinking water , air, and waterways, accumulating in p... | https://en.wikipedia.org/wiki/Metal_toxicity |
A metal triflimidate [ 1 ] M(NTf 2 ) n in organic chemistry is a metal salt or complex of triflimidic acid and used as a catalyst . [ 2 ]
Metal triflimidates are prepared by reaction of metal oxides , carbonates , hydroxides , or halides with triflimidic acid in water as the hydrate M(NTf 2 ) n · x H 2 O with x rangin... | https://en.wikipedia.org/wiki/Metal_triflimidate |
In chemistry , metal vapor synthesis (MVS) is a method for preparing metal complexes by combining freshly produced metal atoms or small particles with ligands . In contrast to the high reactivity of such freshly produced metal atoms, bulk metals typically are unreactive toward neutral ligands. The method has been use... | https://en.wikipedia.org/wiki/Metal_vapor_synthesis |
In logic and linguistics , a metalanguage is a language used to describe another language, often called the object language . [ 1 ] Expressions in a metalanguage are often distinguished from those in the object language by the use of italics, quotation marks , or writing on a separate line. [ citation needed ] The stru... | https://en.wikipedia.org/wiki/Metalanguage |
Metalation (Alt. spelling: Metallation) is a chemical reaction that forms a bond to a metal. This reaction usually refers to the replacement of a halogen atom in an organic molecule with a metal atom, resulting in an organometallic compound. In the laboratory, metalation is commonly used to activate organic molecules d... | https://en.wikipedia.org/wiki/Metalation |
The metallabenzenes are class of chemical compound of the form L n M(CH) 5 , or derivatives thereof. Most metallabenzenes do not feature the M(CH) 5 ring itself, but, instead, some of the H atoms are replaced by other substituents. The parent metallabenzenes can be viewed as derivatives of benzene wherein a CH center ... | https://en.wikipedia.org/wiki/Metallabenzene |
In chemistry , a metalloborane is a compound that contains one or more metal atoms and one or more boron hydride . These compounds are related conceptually and often synthetically to the boron-hydride clusters by replacement of BH n units with metal-containing fragments. Often these metal fragments are derived from m... | https://en.wikipedia.org/wiki/Metallaborane |
A metallacarboxylic acid is a metal complex with the ligand CO 2 H. These compounds are intermediates in reactions that involve carbon monoxide and carbon dioxide , these species are intermediates in the water gas shift reaction . Metallacarboxylic acids are also called hydroxycarbonyls . [ 1 ]
Metallacarboxylic acids... | https://en.wikipedia.org/wiki/Metallacarboxylic_acid |
In chemistry , metallacrowns are a macrocyclic compounds that consist of metal ions and solely or predominantly heteroatoms in the ring . Classically, metallacrowns contain an [M–N–O] repeat unit in the macrocycle. First discovered by Vincent L. Pecoraro and Myoung Soo Lah in 1989, [ 1 ] metallacrowns are best describe... | https://en.wikipedia.org/wiki/Metallacrown |
In organometallic chemistry , a metallacycle is a derivative of a carbocyclic compound wherein a metal has replaced at least one carbon center; [ 2 ] [ 3 ] this is to some extent similar to heterocycles . Metallacycles appear frequently as reactive intermediates in catalysis , e.g. olefin metathesis and alkyne trimeriz... | https://en.wikipedia.org/wiki/Metallacycle |
Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged ( cationic ) molecular ion with the chemical formula NH + 4 or [NH 4 ] + . It is formed by the addition of a proton (a hydrogen nucleus) to ammonia ( NH 3 ). Ammonium is also a general name for positively charged (proton... | https://en.wikipedia.org/wiki/Metallic_ammonium |
Metallic hydrogen is a phase of hydrogen in which it behaves like an electrical conductor . This phase was predicted in 1935 on theoretical grounds by Eugene Wigner and Hillard Bell Huntington . [ 1 ]
At high pressure and temperatures, metallic hydrogen can exist as a partial liquid rather than a solid , and researche... | https://en.wikipedia.org/wiki/Metallic_hydrogen |
A metallic microlattice is a synthetic porous metallic material consisting of an ultra-light metal foam . With a density as low as 0.99 mg/cm 3 (0.00561 lb/ft 3 ), it is one of the lightest structural materials known to science. [ 1 ] It was developed by a team of scientists from California -based HRL Laboratories , in... | https://en.wikipedia.org/wiki/Metallic_microlattice |
A metallic soap is a metallic salt of a fatty acid . Theoretically, soaps can be made of any metal, although not all enjoy practical uses. [ 1 ] Varying the metal can strongly affect the properties of the compound, particularly its solubility.
Alkali metal and alkaline earth soaps are white solids. [ 1 ] The most comm... | https://en.wikipedia.org/wiki/Metallic_soap |
In astronomy , metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium . Most of the normal currently detectable (i.e. non- dark ) matter in the universe is either hydrogen or helium, and astronomers use the word metals as convenient shorthand for all elements except hydr... | https://en.wikipedia.org/wiki/Metallicity |
The metallicity distribution function is an important concept in stellar and galactic evolution . It is a curve of what proportion of stars have a particular metallicity ([Fe/H], the relative abundance of iron and hydrogen) of a population of stars such as in a cluster or galaxy. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7... | https://en.wikipedia.org/wiki/Metallicity_distribution_function |
The Metalliferous Mines Regulations 1961 replaces both the Metalliferous Mines Regulations, 1926 and the Mysore Gold Mines Regulations, 1953 to prevent possible dangers, accidents and deaths from mining in India. [ 1 ] [ 2 ]
9: Notice of Accident.
10: Notice of disease
60, 61, 63, & 64: Mine plans and Sections
106 ... | https://en.wikipedia.org/wiki/Metalliferous_Mines_Regulations_1961 |
Metallization pressure is the pressure required for a non-metallic chemical element to become a metal . Every material is predicted to turn into a metal if the pressure is high enough, and temperature low enough. Some of these pressures are beyond the reach of diamond anvil cells , and are thus theoretical predictions.... | https://en.wikipedia.org/wiki/Metallization_pressure |
Metallizing is the general name for the technique of coating metal on the surface of objects. Metallic coatings may be decorative, protective or functional.
Techniques for metallization started as early as mirror making. In 1835, Justus von Liebig discovered the process of coating a glass surface with metallic silver ... | https://en.wikipedia.org/wiki/Metallizing |
The metallo-ene reaction is a chemical reaction employed within organic synthesis. Mechanistically similar to the classic ene reaction , [ 1 ] the metallo-ene reaction involves a six-member cyclic transition state that brings an allylic species and an alkene species together to undergo a rearrangement. The initial ally... | https://en.wikipedia.org/wiki/Metallo-ene_reaction |
A metallodendrimer is a type of dendrimer with incorporated metal atoms. The development of this type of material is actively pursued in academia. [ 1 ] [ 2 ] [ 3 ]
The metal can be situated in the repeat unit, the core or at the extremities as end-group . Elements often encountered are palladium and platinum . These ... | https://en.wikipedia.org/wiki/Metallodendrimer |
In chemistry , a metallofullerene is a molecule composed of a metal atom trapped inside a fullerene cage.
Simple metallofullerenes consist of a fullerene cage, typically C 80 , with one or two metal atoms trapped inside. Recently, research has produced metallofullerenes that enclose small clusters of atoms, such as Sc... | https://en.wikipedia.org/wiki/Metallofullerene |
Metallogenium is a proposed genus of bacteria that has an affinity to form star-shaped manganese oxide minerals . The organism is supposedly observed in limnic environments . [ 2 ] [ 3 ] The species is currently not assigned to any taxonomic family . [ 4 ]
This bacteria -related article is a stub . You can help Wikipe... | https://en.wikipedia.org/wiki/Metallogenium |
Metallography is the study of the physical structure and components of metals , by using microscopy .
Ceramic and polymeric materials may also be prepared using metallographic techniques, hence the terms ceramography , plastography and, collectively, materialography.
The surface of a metallographic specimen is prepar... | https://en.wikipedia.org/wiki/Metallography |
In biochemistry, the metallome is the distribution of metal ions in a cellular compartment. The term was coined in analogy with proteome [ 1 ] , as metallomics is the study of metallome: the "comprehensive analysis of the entirety of metal and metalloid species within a cell or tissue type". [ 2 ] Therefore, metallom... | https://en.wikipedia.org/wiki/Metallome |
Metallomesogens are metal complexes that exhibit liquid crystalline behavior. Thus, they adopt ordered structures in the molten phase, e.g. smectic and nematic phases . The dominant interactions responsible for their phase behavior are the nonbonding contacts between organic substituents. Two early classes of such m... | https://en.wikipedia.org/wiki/Metallomesogen |
Metallopeptides (also called metal-peptides or metal peptide complexes) are peptides that contain one or more metal ions in their structure . This specific type of peptide are, just like metalloproteins , metallofoldamers. And very similar to metalloproteins , metallopeptide's functionality is attributed through the co... | https://en.wikipedia.org/wiki/Metallopeptide |
In chemistry , a metallophilic interaction is defined as a type of non- covalent attraction between heavy metal atoms. The atoms are often within Van der Waals distance of each other and are about as strong as hydrogen bonds . [ 1 ] The effect can be intramolecular or intermolecular . Intermolecular metallophilic inter... | https://en.wikipedia.org/wiki/Metallophilic_interaction |
A metallophyte is a plant that can tolerate high levels of heavy metals such as lead . Such plants range between "obligate metallophytes" (which can only survive in the presence of these metals), and "facultative metallophytes" which can tolerate such conditions but are not confined to them. [ 1 ]
European examples in... | https://en.wikipedia.org/wiki/Metallophyte |
Metalloprotein is a generic term for a protein that contains a metal ion cofactor . [ 1 ] [ 2 ] A large proportion of all proteins are part of this category. For instance, at least 1000 human proteins (out of ~20,000) contain zinc-binding protein domains [ 3 ] although there may be up to 3000 human zinc metalloproteins... | https://en.wikipedia.org/wiki/Metalloprotein |
Metallotolerants are extremophile organisms that are able to survive in environments with a high concentration of dissolved heavy metals . They can be found in environments containing arsenic , cadmium , copper , and zinc . Known metallotolerants include Ferroplasma sp. and Cupriavidus metallidurans .
Metallotoleran... | https://en.wikipedia.org/wiki/Metallotolerant |
Metallum Martis is a 1665 book by the English metallurgist Dud Dudley . It is the earliest known reference to the use of coal in metallurgical smelting . The book is also referred to as Iron made with Pit-Coale, Sea-Coale, &c. And with the same Fuell to Melt and Fine Imperfect Mettals, And Refine perfect Mettals.
Dudl... | https://en.wikipedia.org/wiki/Metallum_Martis |
Metallurgical and Materials Engineering is a peer-reviewed Open Access scientific journal, published by the Association of Metallurgical Engineers of Serbia. [ 1 ] The first name of the journal was Metalurgija , published in 1995. The new name was adopted in 2012. The journal publishes contributions on fundamental and ... | https://en.wikipedia.org/wiki/Metallurgical_and_Materials_Engineering |
Metallurgical and Materials Transactions is a peer-reviewed scientific journal published in three sections ( A, B, and E ) covering metallurgy and materials science . The journals are jointly published by The Minerals, Metals & Materials Society and ASM International .
This monthly section focuses on physical metallur... | https://en.wikipedia.org/wiki/Metallurgical_and_Materials_Transactions |
A metallurgical assay is a compositional analysis of an ore , metal , or alloy , usually performed in order to test for purity or quality.
Some assay methods are suitable for raw materials; others are more appropriate for finished goods. Raw precious metals ( bullion ) are assayed by an assay office . Silver is assaye... | https://en.wikipedia.org/wiki/Metallurgical_assay |
Metallurgical failure analysis is the process to determine the mechanism that has caused a metal component to fail . It can identify the cause of failure, providing insight into the root cause and potential solutions to prevent similar failures in the future, as well as culpability, which is important in legal cases. [... | https://en.wikipedia.org/wiki/Metallurgical_failure_analysis |
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements , their inter-metallic compounds , and their mixtures, which are known as alloys .
Metallurgy encompasses both the science and the technology of metals, including the production of metals an... | https://en.wikipedia.org/wiki/Metallurgy |
West Asia (6000–3500 BC)
Europe (5500–2200 BC)
Central Asia (3700–1700 BC)
South Asia (4300–1800 BC)
China (5000–2900 BC)
The Copper Age , also called the Eneolithic or the Chalcolithic Age, has been traditionally understood as a transitional period between the Neolithic and the Bronze Age , in which a gradual int... | https://en.wikipedia.org/wiki/Metallurgy_during_the_Copper_Age_in_Europe |
The metallurgical production of the Republic of Azerbaijan is considered high due to the large deposits of alunite , polymetallic ores , deposits of iron ore , etc. The metallurgy industry of Azerbaijan encompasses both ferrous and non-ferrous branches.
Ferrous metallurgy includes extraction of iron , smelting and ref... | https://en.wikipedia.org/wiki/Metallurgy_in_Azerbaijan |
Metallurgy in pre-Columbian America is the extraction, purification and alloying of metals and metal crafting by Indigenous peoples of the Americas prior to European contact in the late 15th century. Indigenous Americans had been using native metals from ancient times, with gold artifacts from the Andean region being d... | https://en.wikipedia.org/wiki/Metallurgy_in_pre-Columbian_America |
The emergence of metallurgy in pre-Columbian Mesoamerica occurred relatively late in the region's history, with distinctive works of metal apparent in West Mexico by roughly 800 CE, and perhaps as early as 600 CE. [ 1 ] Metallurgical techniques likely diffused northward from regions in Central or South America via mari... | https://en.wikipedia.org/wiki/Metallurgy_in_pre-Columbian_Mesoamerica |
Metalogic is the metatheory of logic . Whereas logic studies how logical systems can be used to construct valid and sound arguments , metalogic studies the properties of logical systems . [ 1 ] Logic concerns the truths that may be derived using a logical system; metalogic concerns the truths that may be derived about ... | https://en.wikipedia.org/wiki/Metalogic |
Metalorganic vapour-phase epitaxy ( MOVPE ), also known as organometallic vapour-phase epitaxy ( OMVPE ) or metalorganic chemical vapour deposition ( MOCVD ), [ 1 ] is a chemical vapour deposition method used to produce single- or polycrystalline thin films. It is a process for growing crystalline layers to create comp... | https://en.wikipedia.org/wiki/Metalorganic_vapour-phase_epitaxy |
Metals is a monthly peer-reviewed open access scientific journal covering related scientific research and technology development. It was established in 2011 and is published by MDPI in affiliation with the Portuguese Society of Materials and the Spanish Materials Society. The editor-in-chief is Hugo F. Lopez ( Universi... | https://en.wikipedia.org/wiki/Metals_(journal) |
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