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The Organization for Machine Automation and Control ( OMAC ) is a global organization that supports the machine automation and operational needs of manufacturing. [ 1 ] OMAC, has in conjunction with ISA , created the PackML industry standard for describing the state and transitions of packaging machines. [ 2 ] [ 3 ] [ ... | https://en.wikipedia.org/wiki/Organization_for_Machine_Automation_and_Control |
Organizational space , sometimes called organizational architecture , describes the influence of the spatial environment on the health , the mind , and the behavior of humans in and around organizations . [ 1 ] It is an area of scientific research in which interdisciplinarity is a central perspective. It draws from man... | https://en.wikipedia.org/wiki/Organizational_space |
Organizational technoethics ( OT ) is a branch stemming from technoethics . Advances in technology and their ability to transmit vast amounts of information in a short amount of time have changed the way information is being shared amongst co-workers and managers throughout organizations across the globe. Starting in t... | https://en.wikipedia.org/wiki/Organizational_technoethics |
Organizing center may refer to: | https://en.wikipedia.org/wiki/Organizing_center |
The organising vision (OV) is a term developed by E. Burton Swanson and Neil Ramiller that defines how a vision is formed, a vision of how to organize structures and processes in regards to an information systems innovation. Images and ideas about an innovation from a wider community are brought together. The vision ca... | https://en.wikipedia.org/wiki/Organizing_vision |
Organoastatine chemistry describes the synthesis and properties of organoastatine compounds , chemical compounds containing a carbon to astatine chemical bond .
Astatine is extremely radioactive, with the longest-lived isotope ( 210 At) having a half-life of only 8.1 hours. Consequently, organoastatine chemistry can o... | https://en.wikipedia.org/wiki/Organoastatine_chemistry |
Organoberyllium chemistry involves the synthesis and properties of organometallic compounds featuring the group 2 alkaline earth metal beryllium (Be). [ 2 ] The area remains less developed relative to the chemistry of other main-group elements , because Be compounds are toxic and few applications have been found. [ 3 ]... | https://en.wikipedia.org/wiki/Organoberyllium_chemistry |
Organocalcium chemistry is the chemistry of compounds containing a calcium to carbon bond , [ 1 ] or in broader definitions, organic compounds that contain calcium. [ 2 ] Although discovered around the same time as the now commonly utilized organomagnesium compounds , [ 3 ] organocalcium compounds were subject to great... | https://en.wikipedia.org/wiki/Organocalcium_chemistry |
In organic chemistry , organocatalysis is a form of catalysis in which the rate of a chemical reaction is increased by an organic catalyst. This "organocatalyst" consists of carbon , hydrogen , sulfur and other nonmetal elements found in organic compounds. [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] Because of their similarity... | https://en.wikipedia.org/wiki/Organocatalysis |
Organocerium chemistry is the science of organometallic compounds that contain one or more chemical bond between carbon and cerium . These compounds comprise a subset of the organolanthanides . Most organocerium compounds feature Ce(III) but some Ce(IV) derivatives are known.
Simple alkylcerium reagents are well known... | https://en.wikipedia.org/wiki/Organocerium_chemistry |
Organogenesis is the phase of embryonic development that starts at the end of gastrulation and continues until birth . During organogenesis, the three germ layers formed from gastrulation (the ectoderm , endoderm , and mesoderm ) form the internal organs of the organism. [ 1 ]
The cells of each of the three germ layer... | https://en.wikipedia.org/wiki/Organogenesis |
Organography (from Greek όργανο , organo , " organ "; and -γραφή , -graphy ) is the scientific description of the structure and function of the organs of living things.
Organography as a scientific study starts with Aristotle , who considered the parts of plants as "organs" and began to consider the relationship betwe... | https://en.wikipedia.org/wiki/Organography |
An organoid is a miniaturised and simplified version of an organ produced in vitro in three dimensions that mimics the key functional, structural, and biological complexity of that organ. [ 1 ] It is derived from one or a few cells from a tissue , embryonic stem cells , or induced pluripotent stem cells , which can sel... | https://en.wikipedia.org/wiki/Organoid |
Organoid intelligence ( OI ) is an emerging field of study in computer science and biology that develops and studies biological wetware computing using 3D cultures of human brain cells (or brain organoids ) and brain-machine interface technologies. [ 1 ] Such technologies may be referred to as OIs.
Oragnoid intelligen... | https://en.wikipedia.org/wiki/Organoid_intelligence |
Organometallic chemistry is the study of organometallic compounds , chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal , including alkali , alkaline earth , and transition metals , and sometimes broadened to include metalloids like boron, silicon, and selen... | https://en.wikipedia.org/wiki/Organometallic_chemistry |
Organometallics is a biweekly journal published by the American Chemical Society . Its area of focus is organometallic and organometalloid chemistry. This peer-reviewed journal has an impact factor of 3.837 as reported by the 2021 Journal Citation Reports [ 1 ] by Thomson Reuters .
Since 2015 Paul Chirik is the editor... | https://en.wikipedia.org/wiki/Organometallics |
The Organon ( Ancient Greek : Ὄργανον , meaning "instrument, tool, organ") is the standard collection of Aristotle 's six works on logical analysis and dialectic . The name Organon was given by Aristotle's followers, the Peripatetics , who maintained against the Stoics that Logic was "an instrument" of Philosophy. [ 1 ... | https://en.wikipedia.org/wiki/Organon |
Organoniobium chemistry is the chemistry of compounds containing niobium - carbon (Nb-C) bonds. Compared to the other group 5 transition metal organometallics , the chemistry of organoniobium compounds most closely resembles that of organotantalum compounds. Organoniobium compounds of oxidation states +5, +4, +3, +2, +... | https://en.wikipedia.org/wiki/Organoniobium_chemistry |
Organophosphines are organophosphorus compounds with the formula PR n H 3− n , where R is an organic substituent. These compounds can be classified according to the value of n : primary phosphines ( n = 1), secondary phosphines ( n = 2), tertiary phosphines ( n = 3). All adopt pyramidal structures. [ 1 ] Organophosphi... | https://en.wikipedia.org/wiki/Organophosphine |
An organophosphinic acid is an organophosphorus compound with the formula R 2−n H n PO 2 H (R = alkyl , aryl ). One or both P-H bonds in the parent hypophosphorous acid (aka phosphinic acid) are replaced by organic groups. The Cyanex family of dialkylphosphinic acids are used in hydrometallurgy to extract metals from ... | https://en.wikipedia.org/wiki/Organophosphinic_acid |
Organophosphorus chemistry is the scientific study of the synthesis and properties of organophosphorus compounds , which are organic compounds containing phosphorus . [ 1 ] They are used primarily in pest control as an alternative to chlorinated hydrocarbons that persist in the environment. Some organophosphorus compou... | https://en.wikipedia.org/wiki/Organophosphorus_chemistry |
In industrial paper-making processes, organosolv is a pulping technique that uses an organic solvent to solubilise lignin and hemicellulose. It has been considered in the context of both pulp and paper manufacture and biorefining for subsequent conversion of cellulose to fuel ethanol. The process was invented by Theodo... | https://en.wikipedia.org/wiki/Organosolv |
Organostannane addition is reaction involving the nucleophilic addition of an allyl- , allenyl- , or propargyl- stannane to an aldehyde , imine , or (in rare cases) a ketone . [ 1 ] This reaction is widely used for carbonyl allylation .
The addition of an organostannane to carbonyl group is one of the most common and ... | https://en.wikipedia.org/wiki/Organostannane_addition |
Organosulfur chemistry is the study of the properties and synthesis of organosulfur compounds , which are organic compounds that contain sulfur . [ 1 ] They are often associated with foul odors, but many of the sweetest compounds known are organosulfur derivatives, e.g., saccharin . Nature is abound with organosulfur c... | https://en.wikipedia.org/wiki/Organosulfur_chemistry |
Organotantalum chemistry is the chemistry of chemical compounds containing a carbon -to- tantalum chemical bond . A wide variety of compound have been reported, initially with cyclopentadienyl and CO ligands. Oxidation states vary from −1 to +5.
Pentamethyltantalum was reported by Richard Schrock in 1974. [ 1 ]
Salt... | https://en.wikipedia.org/wiki/Organotantalum_chemistry |
Organotin chemistry is the scientific study of the synthesis and properties of organotin compounds or stannanes , which are organometallic compounds containing tin – carbon bonds. The first organotin compound was diethyltin diiodide ( (CH 3 CH 2 ) 2 SnI 2 ), discovered by Edward Frankland in 1849. [ 1 ] The area grew r... | https://en.wikipedia.org/wiki/Organotin_chemistry |
An organotroph is an organism that obtains hydrogen or electrons from organic substrates. This term is used in microbiology to classify and describe organisms based on how they obtain electrons for their respiration processes. Some organotrophs such as animals and many bacteria , are also heterotrophs . Organotrophs c... | https://en.wikipedia.org/wiki/Organotroph |
In organic and organometallic chemistry , an organyl group (commonly denoted by the letter " R ") is an organic substituent with one (sometimes more) free valence electron(s) at a carbon atom . [ 1 ] The term is often used in chemical patent literature to protect claims over a broad scope. [ citation needed ]
This org... | https://en.wikipedia.org/wiki/Organyl_group |
Orgel's rules are a set of axioms attributed by Francis Crick to the evolutionary biologist Leslie Orgel . [ 1 ] [ 2 ]
"Whenever a spontaneous process is too slow or too inefficient a protein will evolve to speed it up or make it more efficient."
This "rule" comments on the fact that there are a great number of prote... | https://en.wikipedia.org/wiki/Orgel's_rules |
Orgel diagrams are correlation diagrams which show the relative energies of electronic terms in transition metal complexes , much like Tanabe–Sugano diagrams . They are named after their creator, Leslie Orgel . Orgel diagrams are restricted to only show weak field (i.e. high spin ) cases, and offer no information about... | https://en.wikipedia.org/wiki/Orgel_diagram |
Orichalcum or aurichalcum / ˌ ɔːr ɪ ˈ k æ l k ə m / is a metal mentioned in several ancient writings, including the story of Atlantis in the Critias of Plato . Within the dialogue, Critias (460–403 BC) says that orichalcum had been considered second only to gold in value and had been found and mined in many parts of At... | https://en.wikipedia.org/wiki/Orichalcum |
In geometry , the orientation , attitude , bearing , direction , or angular position of an object – such as a line , plane or rigid body – is part of the description of how it is placed in the space it occupies. [ 1 ] More specifically, it refers to the imaginary rotation that is needed to move the object from a refere... | https://en.wikipedia.org/wiki/Orientation_(geometry) |
The orientation of a real vector space or simply orientation of a vector space is the arbitrary choice of which ordered bases are "positively" oriented and which are "negatively" oriented. In the three-dimensional Euclidean space , right-handed bases are typically declared to be positively oriented, but the choice is a... | https://en.wikipedia.org/wiki/Orientation_(vector_space) |
In mathematics, an orientation of a real vector bundle is a generalization of an orientation of a vector space ; thus, given a real vector bundle π: E → B , an orientation of E means: for each fiber E x , there is an orientation of the vector space E x and one demands that each trivialization map (which is a bundle map... | https://en.wikipedia.org/wiki/Orientation_of_a_vector_bundle |
The orientation of a building refers to the direction in which it is constructed and laid out, taking account of its planned purpose and ease of use for its occupants, its relation to the path of the sun and other aspects of its environment. [ 1 ] In church architecture , orientation is an arrangement by which the poin... | https://en.wikipedia.org/wiki/Orientation_of_churches |
In the mathematical field of algebraic topology , the orientation sheaf on a manifold X of dimension n is a locally constant sheaf o X on X such that the stalk of o X at a point x is the local homology group
(in the integer coefficients or some other coefficients).
Let Ω M k {\displaystyle \Omega _{M}^{k}} be the she... | https://en.wikipedia.org/wiki/Orientation_sheaf |
In solid-state physics , an orientational glass [ 1 ] is a molecular solid in which crystalline long-range order coexists with quenched disorder in some rotational degree of freedom .
An orientational glass is either obtained by quenching a plastic crystal , (e.g. cyclohexane , levoglucosan [ 2 ] ), or it is a mixed c... | https://en.wikipedia.org/wiki/Orientational_glass |
Oriented energy filters are used to grant sight to intelligent machines and sensors. The light comes in and is filtered so that it can be properly computed and analyzed by the computer allowing it to “perceive” what it is measuring. These energy measurements are then calculated to take a real time measurement of the or... | https://en.wikipedia.org/wiki/Oriented_energy_filters |
The orienting response ( OR ), also called orienting reflex , is an organism's immediate response to a change in its environment, when that change is not sudden enough to elicit the startle reflex . The phenomenon was first described by Russian physiologist Ivan Sechenov in his 1863 book Reflexes of the Brain , and the... | https://en.wikipedia.org/wiki/Orienting_response |
An orifice plate is a device used for measuring flow rate, reducing pressure or restricting flow (in the latter two cases it is often called a restriction plate ).
An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orifice,... | https://en.wikipedia.org/wiki/Orifice_plate |
In mathematics , the origin of a Euclidean space is a special point , usually denoted by the letter O , used as a fixed point of reference for the geometry of the surrounding space.
In physical problems, the choice of origin is often arbitrary, meaning any choice of origin will ultimately give the same answer. This al... | https://en.wikipedia.org/wiki/Origin_(mathematics) |
Fluorine is relatively rare in the universe compared to other elements of nearby atomic weight . On Earth , fluorine is essentially found only in mineral compounds because of its reactivity. The main commercial source, fluorite , is a common mineral.
At 400 ppb, fluorine is estimated to be the 24th most common element... | https://en.wikipedia.org/wiki/Origin_and_occurrence_of_fluorine |
An origin myth is a type of myth that explains the beginnings of a natural or social aspect of the world. Creation myths are a type of origin myth narrating the formation of the universe. However, numerous cultures have stories that take place after the initial origin. These stories aim to explain the origins of natura... | https://en.wikipedia.org/wiki/Origin_myth |
Original antigenic sin , also known as antigenic imprinting , the Hoskins effect , [ 1 ] immunological imprinting , [ 2 ] or primary addiction [ 3 ] is the propensity of the immune system to preferentially use immunological memory based on a previous infection when a second slightly different version of that foreign pa... | https://en.wikipedia.org/wiki/Original_antigenic_sin |
An original net animation ( ONA ), known in Japan as web anime ( ウェブアニメ , webu anime ) , is an anime that is directly released onto the Internet . [ 1 ] [ 2 ] ONAs may also have been aired on television if they were first directly released on the Internet. The name mirrors original video animation , a term that has bee... | https://en.wikipedia.org/wiki/Original_net_animation |
The proof of Gödel's completeness theorem given by Kurt Gödel in his doctoral dissertation of 1929 (and a shorter version of the proof, published as an article in 1930, titled "The completeness of the axioms of the functional calculus of logic" (in German)) is not easy to read today; it uses concepts and formalisms tha... | https://en.wikipedia.org/wiki/Original_proof_of_Gödel's_completeness_theorem |
Origination of Organismal Form: Beyond the Gene in Developmental and Evolutionary Biology is an anthology published in 2003 edited by Gerd B. Müller and Stuart A. Newman . The book is the outcome of the 4th Altenberg Workshop in Theoretical Biology on "Origins of Organismal Form: Beyond the Gene Paradigm", hosted in 19... | https://en.wikipedia.org/wiki/Origination_of_Organismal_Form |
Origins Space Telescope ( Origins ) is a concept study for a far-infrared survey space telescope mission. [ 1 ] A preliminary concept in pre-formulation, it was presented to the United States Decadal Survey in 2019 for a possible selection to NASA's large strategic science missions . Origins would provide an array of n... | https://en.wikipedia.org/wiki/Origins_Space_Telescope |
Origins of Life and Evolution of Biospheres is a peer-reviewed scientific journal established in 1968 covering astrobiology and origins of life research. It is the official journal of the International Astrobiology Society (previously known as the International Society for the Study of the Origin of Life). The journal'... | https://en.wikipedia.org/wiki/Origins_of_Life_and_Evolution_of_Biospheres |
Orimulsion is a registered trademark name for a bitumen -based fuel that was developed for industrial use by Intevep, the Research and Development Affiliate of Petroleos de Venezuela SA (PDVSA), following earlier collaboration on oil emulsions with BP .
Like coal and oil, bitumen occurs naturally and is obtained from ... | https://en.wikipedia.org/wiki/Orimulsion |
Orion is a system-on-a-chip manufactured by Marvell Technology Group and used in network-attached storage . Based on the ARMv5TE architecture , it has on-chip support for Ethernet , SATA and USB , and is used in hardware made by Hewlett-Packard and D-Link among others. [ 1 ] It is supported by the Lenny release of Deb... | https://en.wikipedia.org/wiki/Orion_(system-on-a-chip) |
The Orka -class submarine is a future submarine class currently planned for the Royal Netherlands Navy (RNLN). [ 6 ] The submarines will replace the aging Walrus class . [ 7 ] [ 8 ] They will be the first submarines of the RNLN that are built at a foreign shipyard. [ 9 ] As of 2024 they are planned to enter service in ... | https://en.wikipedia.org/wiki/Orka-class_submarine |
94103
66612
ENSG00000172057
ENSMUSG00000038150
Q8N138
Q9CPZ6
NM_139280 NM_001320801 NM_001320802 NM_001320803 NM_016471
NM_025661
NP_001307730 NP_001307731 NP_001307732 NP_644809
NP_079937
ORMDL sphingolipid biosynthesis regulator 3 is a protein that in humans is encoded by the ORMDL3 gene . [ 5 ] Variants af... | https://en.wikipedia.org/wiki/Ormdl_sphingolipid_biosynthesis_regulator_3 |
Orme's law is a rule of thumb to assist modelers when they design an electric power system for their radio-controlled model . Orme's law simply recommends the use of one NiMH rechargeable battery cell for every 35 square inches (230 cm 2 ) of wing area for sport planes. One cell for every 50 square inches (320 cm 2 ) ... | https://en.wikipedia.org/wiki/Orme's_law |
An ornamental animal is an animal kept for display or curiosity, often in a park . A wide range of mammals, birds and fish have been kept as ornamental animals. Ornamental animals have often formed the basis of introduced populations, sometimes with negative ecological effects, but a history of being kept as ornament... | https://en.wikipedia.org/wiki/Ornamental_animal |
Ornithology , from Ancient Greek ὄρνις ( órnis ), meaning "bird", and -logy from λόγος ( lógos ), meaning "study", is a branch of zoology dedicated to the study of birds . [ 1 ] Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. [ 2 ] It ... | https://en.wikipedia.org/wiki/Ornithology |
In statistical mechanics the Ornstein–Zernike ( OZ ) equation is an integral equation introduced [ 1 ] by Leonard Ornstein and Frits Zernike that relates different correlation functions with each other. Together with a closure relation, it is used to compute the structure factor and thermodynamic state functions of amo... | https://en.wikipedia.org/wiki/Ornstein–Zernike_equation |
OroraTech is a German aerospace start-up company providing wildfire monitoring by employing nanosatellites . It was founded in 2018 as a university spin-off at the Technical University of Munich (TUM) . The headquarters are in Munich , Germany. [ 1 ] In June 2023, OroraTech joined the Copernicus Programme of the Europe... | https://en.wikipedia.org/wiki/OroraTech |
Orosomucoid ( ORM ) or alpha-1-acid glycoprotein ( α 1 AGp , [ 1 ] AGP or AAG ) is an acute phase protein found in plasma . Orosomucoid was discovered over 70 years ago and belongs to the lipocalin protein family. [ 2 ] There are two isoforms of AGP, referred to as AGP1 and AGP2. [ 2 ] It is an alpha-globulin glycoprot... | https://en.wikipedia.org/wiki/Orosomucoid |
Orotidine 5'-monophosphate ( OMP ), also known as orotidylic acid , is a pyrimidine nucleotide [ 1 ] which is the last intermediate in the biosynthesis of uridine monophosphate . [ 2 ] OMP is formed from orotate and phosphoribosyl pyrophosphate by the enzyme orotate phosphoribosyltransferase .
In humans, the enzyme UM... | https://en.wikipedia.org/wiki/Orotidine_5'-monophosphate |
An orphan drug is a pharmaceutical agent that is developed to treat certain rare medical conditions. An orphan drug would not be profitable to produce without government assistance, due to the small population of patients affected by the conditions. The conditions that orphan drugs are used to treat are referred to as ... | https://en.wikipedia.org/wiki/Orphan_drug |
An orphan virus is a virus that is not associated with a disease but may possess pathogenicity . [ 1 ]
Some orphan viruses include adeno-associated virus ( Parvoviridae ), human herpesvirus 7 ( Herpesviridae ), human foamy virus ( Retroviridae ), Human Reovirus ( Reoviridae ), hepatitis G ( Flaviviridae ), and TT viru... | https://en.wikipedia.org/wiki/Orphan_virus |
Orphan wells in Alberta, Canada are inactive oil or gas well sites that have no solvent owner that can be held legally or financially accountable for the decommissioning and reclamation obligations to ensure public safety and to address environmental liabilities. [ 2 ] [ 3 ] [ 4 ]
The 100% industry-funded Alberta Ener... | https://en.wikipedia.org/wiki/Orphan_wells_in_Alberta,_Canada |
Orpiment , also known as ″ yellow arsenic blende ″ is a deep-colored, orange-yellow arsenic sulfide mineral with formula As 2 S 3 . It is found in volcanic fumaroles , low-temperature hydrothermal veins, and hot springs and may be formed through sublimation .
Orpiment takes its name from the Latin auripigmentum ( auru... | https://en.wikipedia.org/wiki/Orpiment |
An orrery is a mechanical model of the Solar System that illustrates or predicts the relative positions and motions of the planets and moons , usually according to the heliocentric model . It may also represent the relative sizes of these bodies; however, since accurate scaling is often not practical due to the actual ... | https://en.wikipedia.org/wiki/Orrery |
The Orr–Sommerfeld equation , in fluid dynamics , is an eigenvalue equation describing the linear two-dimensional modes of disturbance to a viscous parallel flow. The solution to the Navier–Stokes equations for a parallel, laminar flow can become unstable if certain conditions on the flow are satisfied, and the Orr–So... | https://en.wikipedia.org/wiki/Orr–Sommerfeld_equation |
In geometry , an orthant [ 1 ] or hyperoctant [ 2 ] is the analogue in n -dimensional Euclidean space of a quadrant in the plane or an octant in three dimensions.
In general an orthant in n -dimensions can be considered the intersection of n mutually orthogonal half-spaces . By independent selections of half-space sig... | https://en.wikipedia.org/wiki/Orthant |
ortho -Carborane is the organoboron compound with the formula C 2 B 10 H 12 . The prefix ortho is derived from ortho . It is the most prominent carborane . This derivative has been considered for a wide range of applications from heat-resistant polymers to medical applications. It is a colorless solid that melts, with... | https://en.wikipedia.org/wiki/Ortho-Carborane |
OrthoDB [ 1 ] [ 2 ] [ 3 ] [ 4 ] presents a catalog of orthologous protein-coding genes across vertebrates , arthropods , fungi , plants , and bacteria . Orthology refers to the last common ancestor of the species under consideration, and thus OrthoDB explicitly delineates orthologs at each major radiation along the spe... | https://en.wikipedia.org/wiki/OrthoDB |
OrthoFinder is a command-line software tool for comparative genomics . [ 1 ] [ 2 ] OrthoFinder determines the correspondence between genes in different organisms (also known as orthology analysis). This correspondence provides a framework for understanding the evolution of life on Earth, and enables the extrapolation a... | https://en.wikipedia.org/wiki/OrthoFinder |
In organic chemistry , ortho acids are organic , hypothetical chemical compounds having the structure R−C(OH) 3 (R = alkyl or aryl ). [ 1 ]
Ortho acids themselves are unstable and cannot be isolated. However, ortho esters can be synthesized by the Pinner reaction , in which nitriles react with alcohols under acid cata... | https://en.wikipedia.org/wiki/Ortho_acid |
Ortho effect is an organic chemistry phenomenon where the presence of a chemical group at the at ortho position or the 1 and 2 position of a phenyl ring , relative to the carboxylic compound changes the chemical properties of the compound. This is caused by steric effects and bonding interactions along with polar eff... | https://en.wikipedia.org/wiki/Ortho_effect |
In organic chemistry , an ortho ester is a functional group containing three alkoxy groups attached to one carbon atom, i.e. with the general formula RC(OR') 3 . Orthoesters may be considered as products of exhaustive alkylation of unstable orthocarboxylic acids and it is from these that the name 'ortho ester' is deriv... | https://en.wikipedia.org/wiki/Ortho_ester |
Orthoacetic acid or ethane-1,1,1-triol is an hypothetical organic compound with formula C 2 H 6 O 3 or H 3 C-C(OH) 3 . It would be an ortho acid with the ethane backbone.
Orthoacetic acid is believed to be impossible to isolate, since it would readily decompose into acetic acid and water . It may have a fleeting exi... | https://en.wikipedia.org/wiki/Orthoacetic_acid |
In inorganic chemistry , an orthoborate is a polyatomic anion with formula [BO 3 ] 3− or a salt containing the anion; such as trisodium orthoborate (Na + ) 3 [BO 3 ] 3− . It is one of several boron oxyanions , or borates .
The name is also used in organic chemistry for the trivalent functional group B(O−) 3 , or any c... | https://en.wikipedia.org/wiki/Orthoborate |
Orthocarbonic acid , carbon hydroxide , methanetetrol is the name given to a hypothetical compound with the chemical formula H 4 CO 4 or C(OH) 4 . Its molecular structure consists of a single carbon atom bonded to four hydroxyl groups. It would be therefore a fourfold alcohol . In theory it could lose four protons to g... | https://en.wikipedia.org/wiki/Orthocarbonic_acid |
In geometry , an orthocentric tetrahedron is a tetrahedron where all three pairs of opposite edges are perpendicular . It is also known as an orthogonal tetrahedron since orthogonal means perpendicular. It was first studied by Simon Lhuilier in 1782, and got the name orthocentric tetrahedron by G. de Longchamps in 1890... | https://en.wikipedia.org/wiki/Orthocenter_(tetrahedron) |
The orthogonal Procrustes problem [ 1 ] is a matrix approximation problem in linear algebra . In its classical form, one is given two matrices A {\displaystyle A} and B {\displaystyle B} and asked to find an orthogonal matrix Ω {\displaystyle \Omega } which most closely maps A {\displaystyle A} to B {\displaystyle B} ... | https://en.wikipedia.org/wiki/Orthogonal_Procrustes_problem |
In mathematics, an orthogonal array (more specifically, a fixed-level orthogonal array ) is a "table" (array) whose entries come from a fixed finite set of symbols (for example, {1,2,..., v }), arranged in such a way that there is an integer t so that for every selection of t columns of the table, all ordered t - tuple... | https://en.wikipedia.org/wiki/Orthogonal_array |
In mathematics , particularly linear algebra , an orthogonal basis for an inner product space V {\displaystyle V} is a basis for V {\displaystyle V} whose vectors are mutually orthogonal . If the vectors of an orthogonal basis are normalized , the resulting basis is an orthonormal basis .
Any orthogonal basis can be ... | https://en.wikipedia.org/wiki/Orthogonal_basis |
In geometry , two circles are said to be orthogonal if their respective tangent lines at the points of intersection are perpendicular (meet at a right angle ).
A straight line through a circle's center is orthogonal to it, and if straight lines are also considered as a kind of generalized circles , for instance in inv... | https://en.wikipedia.org/wiki/Orthogonal_circles |
In the mathematical fields of linear algebra and functional analysis , the orthogonal complement of a subspace W {\displaystyle W} of a vector space V {\displaystyle V} equipped with a bilinear form B {\displaystyle B} is the set W ⊥ {\displaystyle W^{\perp }} of all vectors in V {\displaystyle V} that are orthogonal t... | https://en.wikipedia.org/wiki/Orthogonal_complement |
In linear algebra , an orthogonal diagonalization of a normal matrix (e.g. a symmetric matrix ) is a diagonalization by means of an orthogonal change of coordinates. [ 1 ]
The following is an orthogonal diagonalization algorithm that diagonalizes a quadratic form q ( x ) on R {\displaystyle \mathbb {R} } n by means of... | https://en.wikipedia.org/wiki/Orthogonal_diagonalization |
In linear algebra , an orthogonal transformation is a linear transformation T : V → V on a real inner product space V , that preserves the inner product . That is, for each pair u , v of elements of V , we have [ 1 ]
Since the lengths of vectors and the angles between them are defined through the inner product, orthog... | https://en.wikipedia.org/wiki/Orthogonal_transformation |
In mathematics , orthogonality is the generalization of the geometric notion of perpendicularity to linear algebra of bilinear forms .
Two elements u and v of a vector space with bilinear form B {\displaystyle B} are orthogonal when B ( u , v ) = 0 {\displaystyle B(\mathbf {u} ,\mathbf {v} )=0} . Depending on the bil... | https://en.wikipedia.org/wiki/Orthogonality_(mathematics) |
Orthographic projection (also orthogonal projection and analemma ) [ a ] is a means of representing three-dimensional objects in two dimensions . Orthographic projection is a form of parallel projection in which all the projection lines are orthogonal to the projection plane , [ 2 ] resulting in every plane of the scen... | https://en.wikipedia.org/wiki/Orthographic_projection |
OMA ( Orthologous MAtrix ) is a database of orthologs extracted from available complete genomes . [ 1 ] [ 2 ] The orthology predictions of OMA are available in several forms:
This Biological database -related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Orthologous_MAtrix |
An orthomode transducer ( OMT ) is a waveguide component that is commonly referred to as a polarisation duplexer . Orthomode is a contraction of orthogonal mode . Orthomode transducers serve either to combine or to separate two orthogonally polarized microwave signal paths. [ 1 ] One of the paths forms the uplink , whi... | https://en.wikipedia.org/wiki/Orthomode_transducer |
In abstract algebra , an orthomorphism is a certain kind of mapping from a group into itself. Let G be a group, and let θ be a permutation of G . Then θ is an orthomorphism of G if the mapping f defined by f ( x ) = x −1 θ ( x ) is also a permutation of G . A permutation φ of G is a complete mapping if the mapping g... | https://en.wikipedia.org/wiki/Orthomorphism |
An orthonormal function system (ONS) is an orthonormal basis in a vector space of functions . [ 1 ]
This linear algebra -related article is a stub . You can help Wikipedia by expanding it .
This mathematical analysis –related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Orthonormal_function_system |
In linear algebra , two vectors in an inner product space are orthonormal if they are orthogonal unit vectors . A unit vector means that the vector has a length of 1, which is also known as normalized. Orthogonal means that the vectors are all perpendicular to each other. A set of vectors form an orthonormal set if all... | https://en.wikipedia.org/wiki/Orthonormality |
In material science and solid mechanics , orthotropic materials have material properties at a particular point which differ along three orthogonal axes, where each axis has twofold rotational symmetry . These directional differences in strength can be quantified with Hankinson's equation .
They are a subset of anisotr... | https://en.wikipedia.org/wiki/Orthotropic_material |
An Ortman key is a coupling device used to secure two adjacent cylindrical segments of a pressure vessel common in tactical rocket motors . An Ortman key is made of elongated rectangular metal bar stock, such as steel , and is inserted into juxtaposed annular grooves around the circumference of the mating parts. The ... | https://en.wikipedia.org/wiki/Ortman_key |
Oryx—The International Journal of Conservation is a peer-reviewed academic journal of conservation science and practice, published bimonthly by Cambridge University Press on behalf of Fauna & Flora International .
The journal publishes material on biodiversity conservation , conservation policy and sustainable use, an... | https://en.wikipedia.org/wiki/Oryx_(journal) |
Osmium tetrabromide is the inorganic compound with the formula OsBr 4 . A black solid, this compound can be produced by heating osmium tetrachloride and bromine under pressure.
As determined by X-ray crystallography , osmium tetrabromide is an inorganic polymer. It is isomorphous with platinum tetrabromide and technet... | https://en.wikipedia.org/wiki/OsBr4 |
Osmium(III) chloride is an inorganic chemical compound of osmium metal and chlorine with the chemical formula OsCl 3 . [ 1 ] [ 2 ]
Osmium(III) chloride can be made by a reaction of chlorine with osmium:
It can also be made by heating of osmium(IV) chloride :
Osmium(III) chloride forms black-brown crystals. [ 3 ]
Os... | https://en.wikipedia.org/wiki/OsCl3 |
Osmium(IV) chloride or osmium tetrachloride is the inorganic compound composed of osmium and chlorine with the empirical formula OsCl 4 . It exists in two polymorphs (crystalline forms). The compound is used to prepare other osmium complexes.
It was first reported in 1909 as the product of chlorination of osmium meta... | https://en.wikipedia.org/wiki/OsCl4 |
Osmium hexafluoride , also osmium(VI) fluoride , (OsF 6 ) is a compound of osmium and fluorine , and one of the seventeen known binary hexafluorides .
Osmium hexafluoride is made by a direct reaction of osmium metal exposed to an excess of elemental fluorine gas at 300 °C.
Osmium hexafluoride is a yellow crystalline ... | https://en.wikipedia.org/wiki/OsF6 |
Osmium dioxide is an inorganic compound with the formula OsO 2 . It exists as brown to black crystalline powder, but single crystals are golden and exhibit metallic conductivity. The compound crystallizes in the rutile structural motif, i.e. the connectivity is very similar to that in the mineral rutile.
OsO 2 can be... | https://en.wikipedia.org/wiki/OsO2 |
Osmium tetroxide (also osmium(VIII) oxide ) is the chemical compound with the formula OsO 4 . The compound is noteworthy for its many uses, despite its toxicity and the rarity of osmium . It also has a number of unusual properties, one being that the solid is volatile . The compound is colourless, but most samples app... | https://en.wikipedia.org/wiki/OsO4 |
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