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Obligate anaerobes are microorganisms killed by normal atmospheric concentrations of oxygen (20.95% O 2 ). [ 1 ] [ 2 ] Oxygen tolerance varies between species, with some species capable of surviving in up to 8% oxygen, while others lose viability in environments with an oxygen concentration greater than 0.5%. [ 3 ]
Th... | https://en.wikipedia.org/wiki/Obligate_anaerobe |
Obligate mutualism is a special case of mutualism where an ecological interaction between species mutually benefits each other, and one or all species are unable to survive without the other. [ 1 ] In some obligate relationships, only one species is dependent on the relationship. For example, a parasite may require a h... | https://en.wikipedia.org/wiki/Obligate_mutualism |
Obligationes or disputations de obligationibus were a medieval disputation format common in the 13th and 14th centuries. [ 1 ] Despite the name, they had nothing to do with ethics or morals but rather dealt with logical formalisms; [ 2 ] the name comes from the fact that the participants were "obliged" to follow the ru... | https://en.wikipedia.org/wiki/Obligationes |
Oblimersen ( INN , trade name Genasense ; also known as Augmerosen and bcl-2 antisense oligodeoxynucleotide G3139 ) is an antisense oligodeoxyribonucleotide being studied as a possible treatment for several types of cancer , including chronic lymphocytic leukemia , B-cell lymphoma , and breast cancer . It may kill canc... | https://en.wikipedia.org/wiki/Oblimersen |
An oblique shock wave is a shock wave that, unlike a normal shock , is inclined with respect to the direction of incoming air. It occurs when a supersonic flow encounters a corner that effectively turns the flow into itself and compresses. [ 1 ] The upstream streamlines are uniformly deflected after the shock wave. Th... | https://en.wikipedia.org/wiki/Oblique_shock |
In software engineering , more specifically in distributed computing , observability is the ability to collect data about programs' execution, modules' internal states, and the communication among components. [ 1 ] [ 2 ] To improve observability, software engineers use a wide range of logging and tracing techniques to ... | https://en.wikipedia.org/wiki/Observability_(software) |
In physics , an observable is a physical property or physical quantity that can be measured . In classical mechanics , an observable is a real -valued "function" on the set of all possible system states, e.g., position and momentum . In quantum mechanics , an observable is an operator , or gauge , where the property of... | https://en.wikipedia.org/wiki/Observable |
The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth ; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion . Assuming the universe is isotropic , the distanc... | https://en.wikipedia.org/wiki/Observable_universe |
Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe , in contrast with theoretical astronomy , which is mainly concerned with calculating the measurable implications of physical models . It is the practice and study of observing celestial objects with t... | https://en.wikipedia.org/wiki/Observational_astronomy |
The planet Venus was first observed in antiquity, and continued with telescopic observations, and then by visiting spacecraft. Spacecraft have performed multiple flybys, orbits, and landings on the planet, including balloon probes that floated in its atmosphere . Study of the planet is aided by its relatively close pro... | https://en.wikipedia.org/wiki/Observations_and_explorations_of_Venus |
In statistics , the observed information , or observed Fisher information , is the negative of the second derivative (the Hessian matrix ) of the " log-likelihood " (the logarithm of the likelihood function ). It is a sample-based version of the Fisher information .
Suppose we observe random variables X 1 , … , X n {\... | https://en.wikipedia.org/wiki/Observed_information |
Some interpretations of quantum mechanics posit a central role for an observer of a quantum phenomenon. [ 1 ] The quantum mechanical observer is tied to the issue of observer effect , where a measurement necessarily requires interacting with the physical object being measured, affecting its properties through the inter... | https://en.wikipedia.org/wiki/Observer_(quantum_physics) |
In physics , the observer effect is the disturbance of an observed system by the act of observation. [ 1 ] [ 2 ] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some o... | https://en.wikipedia.org/wiki/Observer_effect_(physics) |
Obsidian hydration dating ( OHD ) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian .
Obsidian is a volcanic glass that was used by prehistoric people as a raw material in the manufacture of stone tools such as projectile points, knives, or other cutting to... | https://en.wikipedia.org/wiki/Obsidian_hydration_dating |
In addition to the variety of verified DNA structures , there have been a range of proposed DNA models that have either been disproven, or lack sufficient evidence.
Some of these structures were proposed during the 1950s before the structure of the double helix was solved , most famously by Linus Pauling. Non-helical ... | https://en.wikipedia.org/wiki/Obsolete_models_of_DNA_structure |
Obstacles to troop movement represent either natural, human habitat originated, constructed, concealed obstacles, or obstructive impediments to movement of military troops and their vehicles, or to their visibility. By impeding strategic , operational or tactical manoeuvre , the obstacle represents an added barrier bet... | https://en.wikipedia.org/wiki/Obstacles_to_troop_movement |
The obstetrical dilemma is a hypothesis to explain why humans often require assistance from other humans during childbirth to avoid complications , whereas most non-human primates give birth unassisted with relatively little difficulty. This occurs due to the tight fit of the fetal head to the maternal birth canal, whi... | https://en.wikipedia.org/wiki/Obstetrical_dilemma |
The obturator process is an anatomical feature on the pelvis of archosaurs .
It is a raised area of the ischium bone of the pelvis. [ 1 ] It is the origin of muscles that attach to the femur and aid in running. These muscles are called M. pubo-ischio-femoralis externus 1 and 2 in crocodylians . In birds the muscles ar... | https://en.wikipedia.org/wiki/Obturator_process |
An obturator ring was a type of piston ring used in the early rotary engines of some World War I fighter aircraft for improved sealing in the presence of cylinder distortion.
The cylinders of rotary aircraft engines (engines with the crankshaft fixed to the airframe and rotating cylinders) suffered from uneven cylinde... | https://en.wikipedia.org/wiki/Obturator_ring |
Ocarina Networks was a technology company selling a hardware / software solution designed to reduce data footprints with file-aware storage optimization. A subsidiary of Dell , [ 1 ] their flagship product, the Ocarina Appliance/Reader, released in April 2008, uses patented data compression techniques incorporating suc... | https://en.wikipedia.org/wiki/Ocarina_Networks |
In philosophy , Occam's razor (also spelled Ockham's razor or Ocham's razor ; Latin : novacula Occami ) is the problem-solving principle that recommends searching for explanations constructed with the smallest possible set of elements. It is also known as the principle of parsimony or the law of parsimony ( Latin : lex... | https://en.wikipedia.org/wiki/Occam's_razor |
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy , but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background. In this general sense, occ... | https://en.wikipedia.org/wiki/Occultation |
In macroecology and community ecology , an occupancy frequency distribution ( OFD ) is the distribution of the numbers of species occupying different numbers of areas. [ 1 ] It was first reported in 1918 by the Danish botanist Christen C. Raunkiær in his study on plant communities. The OFD is also known as the species-... | https://en.wikipedia.org/wiki/Occupancy_frequency_distribution |
In ecology , the occupancy–abundance ( O–A ) relationship is the relationship between the abundance of species and the size of their ranges within a region. This relationship is perhaps one of the most well-documented relationships in macroecology , and applies both intra- and interspecifically (within and among specie... | https://en.wikipedia.org/wiki/Occupancy–abundance_relationship |
Occupational exposure banding , also known as hazard banding , is a process intended to quickly and accurately assign chemicals into specific categories (bands), each corresponding to a range of exposure concentrations designed to protect worker health. These bands are assigned based on a chemical’s toxicological poten... | https://en.wikipedia.org/wiki/Occupational_exposure_banding |
An occupational exposure limit is an upper limit on the acceptable concentration of a hazardous substance in workplace air for a particular material or class of materials. It is typically set by competent national authorities and enforced by legislation to protect occupational safety and health . It is an important too... | https://en.wikipedia.org/wiki/Occupational_exposure_limit |
Occupational safety and health ( OSH ) or occupational health and safety ( OHS ) is a multidisciplinary field concerned with the safety , health , and welfare of people at work (i.e., while performing duties required by one's occupation). OSH is related to the fields of occupational medicine and occupational hygiene [ ... | https://en.wikipedia.org/wiki/Occupational_safety_and_health |
Occupational toxicology is the application of toxicology to chemical hazards in the workplace. It focuses on substances and conditions that people may be exposed to in workplaces, including inhalation and dermal exposures , which are most prevalent when discussing occupational toxicology. These environmental and indiv... | https://en.wikipedia.org/wiki/Occupational_toxicology |
In computer science , the occurs check is a part of algorithms for syntactic unification . It causes unification of a variable V and a structure S to fail if S contains V .
In theorem proving , unification without the occurs check can lead to unsound inference . For example, the Prolog goal X = f ( X ) {\displaystyle... | https://en.wikipedia.org/wiki/Occurs_check |
The Ocean Biodiversity Information System ( OBIS ), formerly Ocean Biogeographic Information System , is a web-based access point to information about the distribution and abundance of living species in the ocean . It was developed as the information management component of the ten year Census of Marine Life (CoML) (20... | https://en.wikipedia.org/wiki/Ocean_Biodiversity_Information_System |
The Ocean Worlds Exploration Program ( OWEP ) is a NASA program [ 1 ] to explore ocean worlds in the outer Solar System that could possess subsurface oceans to assess their habitability and to seek biosignatures of simple extraterrestrial life .
Prime targets include moons that harbor hidden oceans beneath a shell of ... | https://en.wikipedia.org/wiki/Ocean_Worlds_Exploration_Program |
Ocean acidification is the ongoing decrease in the pH of the Earth's ocean . Between 1950 and 2020, the average pH of the ocean surface fell from approximately 8.15 to 8.05. [ 2 ] Carbon dioxide emissions from human activities are the primary cause of ocean acidification, with atmospheric carbon dioxide (CO 2 ) levels ... | https://en.wikipedia.org/wiki/Ocean_acidification |
The Arctic Ocean covers an area of 14,056,000 square kilometers, and supports a diverse and important socioeconomic food web of organisms, despite its average water temperature being 32 degrees Fahrenheit. [ 1 ] Over the last three decades, the Arctic Ocean has experienced drastic changes due to climate change. [ 1 ] O... | https://en.wikipedia.org/wiki/Ocean_acidification_in_the_Arctic_Ocean |
Ocean acidification threatens the Great Barrier Reef by reducing the viability and strength of coral reefs . The Great Barrier Reef, considered one of the seven natural wonders of the world and a biodiversity hotspot , is located in Australia. Similar to other coral reefs, it is experiencing degradation due to ocean ac... | https://en.wikipedia.org/wiki/Ocean_acidification_in_the_Great_Barrier_Reef |
Marine chemistry , also known as ocean chemistry or chemical oceanography , is the study of the chemical composition and processes of the world’s oceans, including the interactions between seawater, the atmosphere, the seafloor, and marine organisms. [ 2 ] This field encompasses a wide range of topics, such as the cycl... | https://en.wikipedia.org/wiki/Ocean_chemistry |
Ocean color is the branch of ocean optics that specifically studies the color of the water and information that can be gained from looking at variations in color. The color of the ocean , while mainly blue, actually varies from blue to green or even yellow, brown or red in some cases. [ 1 ] This field of study develope... | https://en.wikipedia.org/wiki/Ocean_color |
From 1946 through 1993, thirteen countries used ocean disposal or ocean dumping as a method to dispose of nuclear/ radioactive waste with an approximation of 200,000 tons sourcing mainly from the medical, research and nuclear industry. [ 1 ]
The waste materials included both liquids and solids housed in various contai... | https://en.wikipedia.org/wiki/Ocean_disposal_of_radioactive_waste |
Ocean dynamics define and describe the flow of water within the oceans. Ocean temperature and motion fields can be separated into three distinct layers: mixed (surface) layer, upper ocean (above the thermocline ), and deep ocean.
Ocean dynamics has traditionally been investigated by sampling from instruments in situ.... | https://en.wikipedia.org/wiki/Ocean_dynamics |
Ocean fertilization or ocean nourishment is a type of technology for carbon dioxide removal from the ocean based on the purposeful introduction of plant nutrients to the upper ocean to increase marine food production and to remove carbon dioxide from the atmosphere. [ 1 ] [ 2 ] Ocean nutrient fertilization, for example... | https://en.wikipedia.org/wiki/Ocean_fertilization |
In oceanography , a gyre ( / ˈ dʒ aɪ ər / ) is any large system of ocean surface currents moving in a circular fashion driven by wind movements. Gyres are caused by the Coriolis effect ; planetary vorticity , horizontal friction and vertical friction determine the circulatory patterns from the wind stress curl ( torque... | https://en.wikipedia.org/wiki/Ocean_gyre |
Ocean heat content (OHC) or ocean heat uptake (OHU) is the energy absorbed and stored by oceans , and is thus an important indicator of global warming . [ 2 ] Ocean heat content is calculated by measuring ocean temperature at many different locations and depths, and integrating the areal density of a change in enthalpi... | https://en.wikipedia.org/wiki/Ocean_heat_content |
Ocean optics is the study of how light interacts with water and the materials in water. Although research often focuses on the sea, the field broadly includes rivers, lakes, inland waters, coastal waters, and large ocean basins. How light acts in water is critical to how ecosystems function underwater. Knowledge of oce... | https://en.wikipedia.org/wiki/Ocean_optics |
Ocean turbidity is a measure of the amount of cloudiness or haziness in sea water caused by individual particles that are too small to be seen without magnification. Highly turbid ocean waters are those with many scattering particulates in them. In both highly absorbing and highly scattering waters , visibility into th... | https://en.wikipedia.org/wiki/Ocean_turbidity |
Oceana, inc. is a 501(c)(3) nonprofit ocean conservation organization focused on influencing specific policy decisions on the national level to preserve and restore the world's oceans. It is headquartered in Washington, D.C. , with offices in Juneau , Monterey , Fort Lauderdale , New York , Portland , Toronto , Mexico ... | https://en.wikipedia.org/wiki/Oceana_(conservation_organization) |
Oceaneering International, Inc. is a subsea engineering and applied technology company based in Houston , Texas , U.S. that provides engineered services and hardware to customers who operate in marine , space , and other environments.
Oceaneering's business offerings include remotely operated vehicle (ROV) services, s... | https://en.wikipedia.org/wiki/Oceaneering_International |
The oceanic carbon cycle (or marine carbon cycle ) is composed of processes that exchange carbon between various pools within the ocean as well as between the atmosphere, Earth interior, and the seafloor . The carbon cycle is a result of many interacting forces across multiple time and space scales that circulates carb... | https://en.wikipedia.org/wiki/Oceanic_carbon_cycle |
Oceanic deserts are regions of the oceans characterized by low annual precipitation, comparable to that of continental deserts . [ 1 ] These areas typically overlap with subtropical gyres - large systems of circular ocean currents formed by the global wind patterns . [ 2 ] These gyres are characterized by semi-permanen... | https://en.wikipedia.org/wiki/Oceanic_deserts |
Oceanic dispersal is a type of biological dispersal that occurs when terrestrial organisms transfer from one land mass to another by way of a sea crossing. Island hopping is the crossing of an ocean by a series of shorter journeys between islands, as opposed to a single journey directly to the destination. Often this o... | https://en.wikipedia.org/wiki/Oceanic_dispersal |
Oceanography (from Ancient Greek ὠκεανός ( ōkeanós ) ' ocean ' and γραφή ( graphḗ ) ' writing ' ), also known as oceanology , sea science , ocean science , and marine science , is the scientific study of the ocean , including its physics , chemistry , biology , and geology .
It is an Earth science , which covers a wid... | https://en.wikipedia.org/wiki/Oceanography |
Oceanography and Marine Biology: An Annual Review is an annual review of oceanography and marine biology that has been published since 1963. It was originally edited by Harold Barnes. It was originally published by Aberdeen University Press and Allen & Unwin [ 1 ] but is now published by CRC Press , part of Taylor & Fr... | https://en.wikipedia.org/wiki/Oceanography_and_Marine_Biology:_An_Annual_Review |
In mathematics, an Ockham algebra is a bounded distributive lattice L {\displaystyle L} with a dual endomorphism , that is, an operation ∼ : L → L {\displaystyle \sim \colon L\to L} satisfying
They were introduced by Berman (1977) , and were named after William of Ockham by Urquhart (1979) . Ockham algebras form a var... | https://en.wikipedia.org/wiki/Ockham_algebra |
Oct-2 (octamer-binding protein 2) also known as POU domain, class 2, transcription factor 2 is a protein that in humans is encoded by the POU2F2 gene .
Oct-2 is an octamer transcription factor which is a member of the POU family . [ 1 ]
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Oct-2 |
OctaDist is computer software for crystallography and inorganic chemistry program. It is mainly used for computing distortion parameters of coordination complex such as spin crossover complex (SCO), magnetic metal complex and metal–organic framework (MOF).
The program is developed and maintained in an international co... | https://en.wikipedia.org/wiki/OctaDist |
Octaazacubane is a hypothetical explosive allotrope of nitrogen with formula N 8 , whose molecules have eight atoms arranged into a cube . (By comparison, nitrogen usually occurs as the diatomic molecule N 2 .) It can be regarded as a cubane-type cluster , where all eight corners are nitrogen atoms bonded along the edg... | https://en.wikipedia.org/wiki/Octaazacubane |
Octachlorotetraphosphazene is an inorganic compound with the formula (NPCl 2 ) 4 . The molecule has a cyclic, unsaturated backbone consisting of alternating phosphorus and nitrogen centers, and can be viewed as a tetramer of the hypothetical compound N≡PCl 2 .
The compound has not been studied as much as the related s... | https://en.wikipedia.org/wiki/Octachlorotetraphosphazene |
The octadecanoid pathway is a biosynthetic pathway for the production of the phytohormone jasmonic acid (JA), an important hormone for induction of defense genes. JA is synthesized from alpha-linolenic acid , which can be released from the plasma membrane by certain lipase enzymes. For example, in the wound defense res... | https://en.wikipedia.org/wiki/Octadecanoid_pathway |
Octadecyltrichlorosilane ( ODTS or n -octadecyltrichlorosilane ) is an organosilicon compound with the formula CH 3 (CH 2 ) 17 SiCl 3 . A colorless liquid, it is used as a silanization agent to prepare hydrophobic stationary phase , for reversed-phase chromatography . [ 2 ]
It is also evaluated for forming self-assemb... | https://en.wikipedia.org/wiki/Octadecyltrichlorosilane |
In astronomy , an octaeteris ( Greek : ὀκταετηρίς , plural: octaeterides ) is the period of eight solar years after which the moon phase occurs on the same day of the year plus one or two days.
This period is also in a very good synchronicity with five Venusian visibility cycles (the Venusian synodic period ) and thir... | https://en.wikipedia.org/wiki/Octaeteris |
Octafluorocubane or perfluorocubane is an organofluorine compound with the formula C 8 F 8 , consisting of eight carbon atoms joined into a cube , with a fluorine bonded to each carbon corner. It is a colorless, sublimable solid at room temperature. It has been of longstanding theoretical interest, but was not synthesi... | https://en.wikipedia.org/wiki/Octafluorocubane |
Octafluoropropane (C 3 F 8 ) is the perfluorocarbon counterpart to the hydrocarbon propane . This non-flammable and non-toxic synthetic substance has applications in semiconductor production and medicine. It is also an extremely potent greenhouse gas .
Octafluoropropane can be produced either by electrochemical fluori... | https://en.wikipedia.org/wiki/Octafluoropropane |
This page provides supplementary chemical data on octafluoropropane .
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet ( MSDS ) for this chemical from a reliable source such as SIRI , and follow its directions. | https://en.wikipedia.org/wiki/Octafluoropropane_(data_page) |
Octagon Systems Corporation is an industrial computer design and manufacturing company originally based in Westminster, Colorado . Octagon Systems designs, manufactures, sells, repairs and supports its line of industrial, mobile and rugged computer systems for industries including mining, military, transportation and o... | https://en.wikipedia.org/wiki/Octagon_Systems |
Octahedral clusters are inorganic or organometallic cluster compounds composed of six metals in an octahedral array. [ 1 ] Many types of compounds are known, but all are synthetic.
These compounds are bound together by metal-metal bonding as well as two kinds of ligands. Ligands that span the faces or edges of the M ... | https://en.wikipedia.org/wiki/Octahedral_cluster |
In 4-dimensional geometry , the octahedral cupola is a 4-polytope bounded by one octahedron and a parallel rhombicuboctahedron , connected by 20 triangular prisms , and 6 square pyramids . [ 1 ]
The octahedral cupola can be sliced off from a runcinated 24-cell , on a hyperplane parallel to an octahedral cell. The cupo... | https://en.wikipedia.org/wiki/Octahedral_cupola |
In chemistry , octahedral molecular geometry , also called square bipyramidal , [ 1 ] describes the shape of compounds with six atoms or groups of atoms or ligands symmetrically arranged around a central atom, defining the vertices of an octahedron . The octahedron has eight faces, hence the prefix octa . The octahedro... | https://en.wikipedia.org/wiki/Octahedral_molecular_geometry |
In 4-dimensional geometry , the octahedral pyramid is bounded by one octahedron on the base and 8 triangular pyramid cells which meet at the apex. Since an octahedron has a circumradius divided by edge length less than one, [ 1 ] the triangular pyramids can be made with regular faces (as regular tetrahedrons ) by compu... | https://en.wikipedia.org/wiki/Octahedral_pyramid |
In organic chemistry , a Platonic hydrocarbon is a hydrocarbon whose structure matches one of the five Platonic solids , with carbon atoms replacing its vertices, carbon–carbon bonds replacing its edges, and hydrogen atoms as needed. [ 1 ] [ page needed ]
Not all Platonic solids have molecular hydrocarbon counterparts... | https://en.wikipedia.org/wiki/Octahedrane |
Octamethylenediamine ( OMDA ) is an organic chemical compound from the substance group of aliphatic diamines. It is used as a versatile reaction intermediate in the manufacture of pesticides , especially fungicides .
The industrial production of octamethylene diamine is carried out by the catalytic hydrogenation of su... | https://en.wikipedia.org/wiki/Octamethylenediamine |
An octane rating , or octane number , is a standard measure of a fuel 's ability to withstand compression in an internal combustion engine without causing engine knocking . The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power ou... | https://en.wikipedia.org/wiki/Octane_rating |
Octanitrocubane (molecular formula: C 8 (NO 2 ) 8 ) is a proposed high explosive that, like TNT , is shock-insensitive (not readily detonated by shock). [ 1 ] The octanitrocubane molecule has the same chemical structure as cubane (C 8 H 8 ) except that each of the eight hydrogen atoms is replaced by a nitro group (NO 2... | https://en.wikipedia.org/wiki/Octanitrocubane |
The n -octanol-water partition coefficient, K ow is a partition coefficient for the two-phase system consisting of n -octanol and water. [ 1 ] K ow is also frequently referred to by the symbol P, especially in the English literature. It is also called n -octanol-water partition ratio . [ 2 ] [ 3 ] [ 4 ]
K ow serves as... | https://en.wikipedia.org/wiki/Octanol-water_partition_coefficient |
Octanoyl-coenzyme A is the endpoint of beta oxidation in peroxisomes . It is produced alongside acetyl-CoA and transferred to the mitochondria to be further oxidized into acetyl-CoA. [ 1 ]
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Octanoyl-CoA |
The octant , also called a reflecting quadrant , is a reflecting instrument used in navigation .
The name octant derives from the Latin octans meaning eighth part of a circle , because the instrument's arc is one eighth of a circle .
Reflecting quadrant derives from the instrument using mirrors to reflect the path of... | https://en.wikipedia.org/wiki/Octant_(instrument) |
In geometry , an octant of a sphere is a spherical triangle with three right angles and three right sides. It is sometimes called a trirectangular (spherical) triangle . [ 1 ] It is one face of a spherical octahedron . [ 2 ]
For a sphere embedded in three-dimensional Euclidean space , the vectors from the sphere's cen... | https://en.wikipedia.org/wiki/Octant_of_a_sphere |
Octasulfur is an inorganic substance with the chemical formula S 8 . It is an odourless and tasteless yellow solid, and is a major industrial chemical. It is the most common allotrope of sulfur and occurs widely in nature. [ 4 ]
The name octasulfur is the most commonly used for this chemical. It is systematically name... | https://en.wikipedia.org/wiki/Octasulfur |
Octatetraynyl radical ( C 8 H ) is an organic free radical with eight carbon atoms linked in a linear chain with alternating single bonds and triple bonds ( H−C≡C−C≡C−C≡C−C≡C• ).
In 2007 negatively charged octatetraynyl was detected in Galactic molecular source TMC-1 , making it the second type of anion to be found in... | https://en.wikipedia.org/wiki/Octatetraynyl_radical |
In chemistry , an octatomic element is an element that, at some standard temperature and pressure , is in a configuration of eight atoms bound together (a homonuclear molecule ). The canonical example is sulfur , S 8 , [ 1 ] but red selenium is also an octatomic element stable at room temperature . Octaoxygen is also k... | https://en.wikipedia.org/wiki/Octatomic_element |
The octet is a unit of digital information in computing and telecommunications that consists of eight bits . The term is often used when the term byte might be ambiguous, as the byte has historically been used for storage units of a variety of sizes.
The term octad(e) for eight bits is no longer common. [ 1 ] [ 2 ]
T... | https://en.wikipedia.org/wiki/Octet_(computing) |
The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell , giving it the same electronic configuration as a noble gas . The rule is especially applicable to carbon , nitrogen , oxygen , and the halogen... | https://en.wikipedia.org/wiki/Octet_rule |
A unit of information is any unit of measure of digital data size. In digital computing , a unit of information is used to describe the capacity of a digital data storage device. In telecommunications , a unit of information is used to describe the throughput of a communication channel . In information theory , a unit ... | https://en.wikipedia.org/wiki/Octlet |
Octopus is a software package for performing Kohn–Sham density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations. [ 1 ]
Octopus employs pseudopotentials and real-space numerical grids to propagate the Kohn–Sham orbitals in real time under the influence of time-varying electr... | https://en.wikipedia.org/wiki/Octopus_(software) |
Octopussy , also known as 8Pussy , is a free and open-source computer-software which monitors systems, by constantly analyzing the syslog data they generate and transmit to such a central Octopussy server (thus often called a SIEM solution). [ 3 ] Therefore, software like Octopussy plays an important role in maintainin... | https://en.wikipedia.org/wiki/Octopussy_(software) |
In computing , octuple precision is a binary floating-point -based computer number format that occupies 32 bytes (256 bits ) in computer memory. This 256- bit octuple precision is for applications requiring results in higher than quadruple precision .
The range greatly exceeds what is needed to describe all known phys... | https://en.wikipedia.org/wiki/Octuple-precision_floating-point_format |
An ocular micrometer or eyepiece micrometer is a glass disk, engraved with a ruled scale, that fits in an eyepiece of a microscope , [ 1 ] [ 2 ] which is used to measure the size of microscopic objects through magnification under a microscope. When the eyepiece micrometer is calibrated using a stage micrometer , the le... | https://en.wikipedia.org/wiki/Ocular_micrometer |
In mathematics , parity is the property of an integer of whether it is even or odd . An integer is even if it is divisible by 2, and odd if it is not. [ 1 ] For example, −4, 0, and 82 are even numbers, while −3, 5, 23, and 69 are odd numbers.
The above definition of parity applies only to integer numbers, hence it can... | https://en.wikipedia.org/wiki/Odd_number |
The odd number theorem is a theorem in strong gravitational lensing which comes directly from differential topology .
The theorem states that the number of multiple images produced by a bounded transparent lens must be odd .
The gravitational lensing is a thought to mapped from what's known as image plane to source p... | https://en.wikipedia.org/wiki/Odd_number_theorem |
In astronomy, an odd radio circle ( ORC ) is a very large (over 50 times the diameter of our Milky Way ~ 3 million light years) unexplained astronomical object that, at radio wavelengths , is highly circular and brighter along its edges. [ 3 ] As of 27 April 2021, there have been five such objects (and possibly six mor... | https://en.wikipedia.org/wiki/Odd_radio_circle |
The Oddo–Harkins rule holds that an element with an even atomic number is more abundant than the elements with immediately adjacent atomic numbers . For example, carbon , with atomic number 6, is more abundant than boron (5) and nitrogen (7). Generally, the relative abundance of an even atomic numbered element is rough... | https://en.wikipedia.org/wiki/Oddo–Harkins_rule |
The Oddy test is a procedure created at the British Museum by conservation scientist William Andrew Oddy [ 1 ] in 1973, [ 2 ] in order to test materials for safety in and around art objects.
Often, materials for construction and museum contexts (including artefact conservation) are evaluated for safety. However, though... | https://en.wikipedia.org/wiki/Oddy_test |
In computing, an odd–even sort or odd–even transposition sort (also known as brick sort [ 1 ] [ self-published source ] or parity sort ) is a relatively simple sorting algorithm , developed originally for use on parallel processors with local interconnections. It is a comparison sort related to bubble sort , with whic... | https://en.wikipedia.org/wiki/Odd–even_sort |
Odfjell Drilling Ltd. is an oil drilling , well service , and engineering company.
The company has 3 divisions: [ 3 ]
The company was established in 1973 as an affiliate of Odfjell . In 1974, the first rigs were delivered from Aker ASA , and started service for ELF and Saga Petroleum . The first production drilling c... | https://en.wikipedia.org/wiki/Odfjell_Drilling |
Odile Eisenstein ForMemRS is a theoretical chemist who specializes in modelling the structure and reactivity of transition metals and lanthanide complexes. She is currently the equivalent of an Emeritus Professor at the Institut Charles Gerhardt Montpellier, équipe CTMM at Montpellier 2 University and a professor at t... | https://en.wikipedia.org/wiki/Odile_Eisenstein |
v4 - 1.2.1 (Linux)
Odin is a utility software program developed and used by Samsung internally which is used to communicate with Samsung devices in Odin mode (also called download mode ) through the Thor (protocol) . It can be used to flash a custom recovery firmware image (as opposed to the stock recovery firmware im... | https://en.wikipedia.org/wiki/Odin_(firmware_flashing_software) |
Odyssey Space Research, LLC is a small business based in Houston, Texas near NASA Lyndon B. Johnson Space Center providing engineering research and analysis services. This start-up in the space industry founded in November 2003 has already won major contracts and is the only private company working on the 5 next human-... | https://en.wikipedia.org/wiki/Odyssey_Space_Research |
Oenochroma subustaria , also known as the grey wine moth , [ 3 ] is a species of moth of the family Geometridae . [ 2 ] It is found in Australia , including Tasmania . [ 3 ]
This Oenochrominae moth related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Oenochroma_subustaria |
In mathematics , the phrase " of the form " indicates that a mathematical object, or (more frequently) a collection of objects, follows a certain pattern of expression. It is frequently used to reduce the formality of mathematical proofs .
Here is a proof which should be appreciable with limited mathematical backgroun... | https://en.wikipedia.org/wiki/Of_the_form |
Ofer Lahav ( Hebrew : עופר להב ) FRAS FInstP is Perren Chair of Astronomy at University College London (UCL) , Vice-Dean (International) of the UCL Faculty of Mathematical and Physical Sciences (MAPS) and Co-Director of the STFC Centre for Doctoral Training in Data Intensive Science.
His research area is Observational ... | https://en.wikipedia.org/wiki/Ofer_Lahav |
Off-center ions in crystals are substitutional impurity ions whose equilibrium position is shifted away from the regular lattice site. The magnitude of the shift typically ranges from 0.2 to 1.0 Å. There are two possible mechanisms that can cause impurity ion displacement. If the impurity ion is smaller than the regul... | https://en.wikipedia.org/wiki/Off-center_ions |
Offsite construction refers to the planning, design, manufacture and assembly of building elements at a location other than their final installed location to support the rapid speed of, and efficient construction of a permanent structure. Such building elements may be prefabricated offsite in a different location and t... | https://en.wikipedia.org/wiki/Off-site_construction |
An off-stoichiometry thiol-ene polymer is a polymer platform comprising off-stoichiometry thiol-enes ( OSTE ) and off-stoichiometry thiol-ene-epoxies ( OSTE+ ).
The OSTE polymers comprise off-stoichiometry blends of thiols and allyls. After complete polymerization, typically by UV micromolding, the polymer articles co... | https://en.wikipedia.org/wiki/Off-stoichiometry_thiol-ene_polymer |
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