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Run-Time Abstraction Services ( RTAS ) is run-time firmware that provides abstraction to the operating systems running on IBM System i and IBM System p computers.
It contrasts with Open Firmware , in that the latter is usually used only during boot, while RTAS is used during run-time.
Later it was renamed to Open Pow... | https://en.wikipedia.org/wiki/Run-Time_Abstraction_Services |
A run-around coil is a type of energy recovery heat exchanger most often positioned within the supply and exhaust air streams of an air handling system, or in the exhaust gases of an industrial process, to recover the heat energy. Generally, it refers to any intermediate stream used to transfer heat between two streams... | https://en.wikipedia.org/wiki/Run-around_coil |
Run-length encoding ( RLE ) is a form of lossless data compression in which runs of data (consecutive occurrences of the same data value) are stored as a single occurrence of that data value and a count of its consecutive occurrences, rather than as the original run. As an imaginary example of the concept, when encodin... | https://en.wikipedia.org/wiki/Run-length_encoding |
A run-off transcription assay is an assay in molecular biology which is conducted in vitro to identify the position of the transcription start site (1 base pair upstream) of a specific promoter along with its accuracy and rate of in vitro transcription . [ 1 ] [ 2 ] [ 3 ]
Run-off transcription can be used to quantitat... | https://en.wikipedia.org/wiki/Run-off_transcription |
In hydrology , run-on refers to surface runoff from an external area that flows on to an area of interest. A portion of run-on can infiltrate once it reaches the area of interest. Run-on is common in arid and semi-arid areas with patchy vegetation cover and short but intense thunderstorms . In these environments, sur... | https://en.wikipedia.org/wiki/Run-on |
Run-out or runout is an inaccuracy of rotating mechanical systems, specifically that the tool or shaft does not rotate exactly in line with the main axis . For example; when drilling , run-out will result in a larger hole than the drill's nominal diameter due to the drill
being rotated eccentrically (off axis instead ... | https://en.wikipedia.org/wiki/Run-out |
The term runaway electrons (RE) is used to denote electrons that undergo free fall acceleration into the realm of relativistic particles . REs may be classified as thermal (lower energy) or relativistic. The study of runaway electrons is thought to be fundamental to our understanding of High-Energy Atmospheric Physics.... | https://en.wikipedia.org/wiki/Runaway_electrons |
A runaway train is a type of railroad incident in which unattended rolling stock is accidentally allowed to roll onto the main line, a moving train loses enough braking power to be unable to stop in safety, or a train operates at unsafe speeds due to loss of operator control. If the uncontrolled rolling stock derails o... | https://en.wikipedia.org/wiki/Runaway_train |
The Russian Internet ( Russian : русский Интернет ) or Runet (Russian: Рунет ), is the part of the Internet that uses the Russian language , including the Russian-language community on the Internet and websites. Geographically, it reaches all continents, including Antarctica (due to Russian scientists living at Belling... | https://en.wikipedia.org/wiki/Runet |
The runner's high is a transient state of euphoria coupled with lessened feelings of anxiety and a higher pain threshold, which can come either from continuous moderate physical exertion over time or from short bursts of high-intensity exercise. The exact prevalence is unknown, but it seems to be a relatively rare phen... | https://en.wikipedia.org/wiki/Runner's_high |
A running total or rolling total is the summation of a sequence of numbers which is updated each time a new number is added to the sequence, by adding the value of the new number to the previous running total. Another term for it is partial sum .
The purposes of a running total are twofold. First, it allows the total ... | https://en.wikipedia.org/wiki/Running_total |
Runoff is the flow of water across the earth, and is a major component in the hydrological cycle . Runoff that flows over land before reaching a watercourse is referred to as surface runoff or overland flow . Once in a watercourse , runoff is referred to as streamflow , channel runoff , or river runoff . Urban runoff i... | https://en.wikipedia.org/wiki/Runoff_(hydrology) |
The runoff curve number (also called a curve number or simply CN ) is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess. [ 1 ] The curve number method was developed by the USDA Natural Resources Conservation Service , which was formerly called the Soil Conservati... | https://en.wikipedia.org/wiki/Runoff_curve_number |
A runoff footprint is the total surface runoff that a site produces over the course of a year. According to the United States Environmental Protection Agency (EPA) stormwater is "rainwater and melted snow that runs off streets, lawns, and other sites". [ 1 ] Urbanized areas with high concentrations of impervious surfac... | https://en.wikipedia.org/wiki/Runoff_footprint |
A runoff models or rainfall-runoff model describes how rainfall is converted into runoff in a drainage basin (catchment area or watershed). More precisely, it produces a surface runoff hydrograph in response to a rainfall event, represented by and input as a hyetograph .
Rainfall-runoff models need to be calibrated be... | https://en.wikipedia.org/wiki/Runoff_model_(reservoir) |
Runs of homozygosity (ROH) are contiguous lengths of homozygous genotypes that are present in an individual due to parents transmitting identical haplotypes to their offspring. [ 1 ]
The potential of predicting or estimating individual autozygosity for a subpopulation is the proportion of the autosomal genome above a ... | https://en.wikipedia.org/wiki/Runs_of_homozygosity |
In a group of animals (usually a litter of animals born in multiple births), a runt is a member which is significantly smaller or weaker than the others. [ 1 ] Owing to its small size, a runt in a litter faces disadvantage, including difficulties in competing with its siblings for survival and possible rejection by its... | https://en.wikipedia.org/wiki/Runt |
Execution in computer and software engineering is the process by which a computer or virtual machine interprets and acts on the instructions of a computer program . Each instruction of a program is a description of a particular action which must be carried out, in order for a specific problem to be solved. Execution in... | https://en.wikipedia.org/wiki/Runtime_(program_lifecycle_phase) |
Turbo Pascal is a software development system that includes a compiler and an integrated development environment (IDE) for the programming language Pascal running on the operating systems CP/M , CP/M-86 , and MS-DOS . It was originally developed by Anders Hejlsberg at Borland , and was notable for its very fast compili... | https://en.wikipedia.org/wiki/Runtime_Error_200 |
In computer programming , a runtime system or runtime environment is a sub-system that exists in the computer where a program is created, as well as in the computers where the program is intended to be run. The name comes from the compile time and runtime division from compiled languages , which similarly distinguishes... | https://en.wikipedia.org/wiki/Runtime_system |
In aviation , a runway is an elongated, rectangular surface designed for the landing and takeoff of an aircraft . [ 1 ] Runways may be a human-made surface (often asphalt , concrete , or a mixture of both) or a natural surface ( grass , dirt , gravel , ice , sand or salt ). Runways, taxiways and ramps , are sometimes r... | https://en.wikipedia.org/wiki/Runway |
Runway safety is concerned with reducing harm that could occur on an aircraft runway . Safety means avoiding incorrect presence ( incursion ) of aircraft, inappropriate exits ( excursion ) and use of the wrong runway due to confusion. The runway condition is a runway's current status due to meteorological conditions an... | https://en.wikipedia.org/wiki/Runway_safety |
Ruppeiner geometry is thermodynamic geometry (a type of information geometry ) using the language of Riemannian geometry to study thermodynamics . George Ruppeiner proposed it in 1979. He claimed that thermodynamic systems can be represented by Riemannian geometry, and that statistical properties can be derived from th... | https://en.wikipedia.org/wiki/Ruppeiner_geometry |
A rupture disc , also known as a pressure safety disc , burst disc , bursting disc , or burst diaphragm , is a non-reclosing pressure relief safety device that, in most uses, protects a pressure vessel , equipment or system from overpressurization or potentially damaging vacuum conditions.
A rupture disc is a type of ... | https://en.wikipedia.org/wiki/Rupture_disc |
The Ruputer is a wristwatch computer developed in 1998 by Seiko Instruments , a subsidiary of the Seiko Group . It was introduced on 10 June 1998. [ 1 ] In the US, it was later marketed as the onHand PC by Matsucom.
The Ruputer has a 16-bit, 3.6 MHz processor and 2 MB of non-volatile storage memory and 128 KB of RAM .... | https://en.wikipedia.org/wiki/Ruputer |
In general, a rural area or a countryside is a geographic area that is located outside towns and cities . [ 1 ] Typical rural areas have a low population density and small settlements. Agricultural areas and areas with forestry are typically described as rural, as well as other areas lacking substantial development. Di... | https://en.wikipedia.org/wiki/Rural_area |
Rusavskia elegans (formerly Xanthoria elegans ), commonly known as the elegant sunburst lichen , [ 1 ] is a lichenized species of fungus in the genus Rusavskia , family Teloschistaceae . Recognized by its bright orange or red pigmentation, this species grows on rocks, often near bird or rodent perches. It has a circump... | https://en.wikipedia.org/wiki/Rusavskia_elegans |
In statistical mechanics , the Rushbrooke inequality relates the critical exponents of a magnetic system which exhibits a first-order phase transition in the thermodynamic limit for non-zero temperature T .
Since the Helmholtz free energy is extensive , the normalization to free energy per site is given as
The magnet... | https://en.wikipedia.org/wiki/Rushbrooke_inequality |
The Rushton turbine or Rushton disc turbine is a radial flow impeller used for many mixing applications (commonly for gas dispersion applications) in process engineering and was invented by John Henry Rushton . [ 1 ] The design is based on a flat horizontal disk, with flat, vertically-mounted blades . [ 2 ] Recent inno... | https://en.wikipedia.org/wiki/Rushton_turbine |
The Fritz J. and Dolores H. Russ Prize is an American national and international award established by the United States National Academy of Engineering (NAE) in October 1999 in Athens . Named after Fritz Russ, the founder of Systems Research Laboratories , and his wife Dolores Russ, it recognizes a bioengineering achie... | https://en.wikipedia.org/wiki/Russ_Prize |
Russell Marcus is a philosopher specializing in philosophy of mathematics and the pedagogy of philosophy. He is Chair of Philosophy at Hamilton College and president of the American Association of Philosophy Teachers . [ 1 ]
Prior to his work in philosophy, Marcus taught mathematics and other subjects at high schools ... | https://en.wikipedia.org/wiki/Russell_Marcus |
Russell Stephen Drago (November 5, 1928 – December 5, 1997) was an American professor of inorganic chemistry . He mentored more than 130 PhD students, authored over a dozen textbooks and four hundred research documents, which have been published in several languages. [ citation needed ] He filed 17 process patents. [ 1... | https://en.wikipedia.org/wiki/Russell_S._Drago |
The Russell Varian Prize was an international scientific prize awarded for a single, high-impact and innovative contribution in the field of nuclear magnetic resonance (NMR), that laid the foundation for the development of new technologies in the field. [ 1 ] It honored the memory of Russell Varian , the pioneer behind... | https://en.wikipedia.org/wiki/Russell_Varian_Prize |
The Russian Astronomical Society ( Russian : Русское астрономическое общество was a society established in Saint Petersburg , Russia in 1891 for the promotion of astronomy related studies. In 1894 the society also started publishing the scientific "Journal of the Russian Astronomical Society" ( Russian : Известия Русск... | https://en.wikipedia.org/wiki/Russian_Astronomical_Society |
The Engineer Troops of the Russian Federation ( Russian : Инженерные войска Российской Федерации ) are a Combat Arm and military administrative corps of the Russian Ground Forces of the Russian Federation designed to perform military engineering operations (combat actions), requiring special training of personnel and u... | https://en.wikipedia.org/wiki/Russian_Engineer_Troops |
The Russian Journal of Physical Chemistry A: Focus on Chemistry ( Russian : Журнал физической химии , romanized : Zhurnal fizicheskoi khimii ) [ 1 ] is an English-language translation of the eponymous Russian-language peer-reviewed scientific journal published by Springer Science+Business Media on behalf of Pleiades Pu... | https://en.wikipedia.org/wiki/Russian_Journal_of_Physical_Chemistry_A |
The Russian Journal of Physical Chemistry B ( Russian : Химическая физика , romanized : Khimicheskaya fizika ) [ 1 ] is an English-language translation of the eponymous Russian-language peer-reviewed scientific journal published by MAIK Nauka /Interperiodica and Springer Science+Business Media . The journal covers all ... | https://en.wikipedia.org/wiki/Russian_Journal_of_Physical_Chemistry_B |
Russian tsunami warning system ( Russian : Российская система предупреждения о цунами ), also known as Russian tsunami warning service ( Russian : Российская служба предупреждения о цунами ), is a tsunami warning system in the Russian Far East which is operated and maintained by the Geophysical Service of the Russian A... | https://en.wikipedia.org/wiki/Russian_Tsunami_Warning_System |
The Russian Union of Engineers (RUE) (Russian: Российский союз инженеров (РСИ)) claims to be an all-Russian nongovernmental organization of engineers , design-engineers, builders , inventors , rationalizers, researchers , scientists , scientific and technical employees, and managers of industrial production . It has pu... | https://en.wikipedia.org/wiki/Russian_Union_of_Engineers |
The Russian tortoise ( Testudo horsfieldii ) , also commonly known as the Afghan tortoise , the Central Asian tortoise , the four-clawed tortoise , the four-toed tortoise , Horsfield's tortoise , the Russian steppe tortoise , the Soviet Tortoise , and the steppe tortoise , [ 3 ] [ 4 ] is a threatened species of tortois... | https://en.wikipedia.org/wiki/Russian_tortoise |
The Russia–Ukraine barrier , also known as the Ukrainian Wall or the European Wall [ 2 ] [ 3 ] ( Ukrainian : Європейський вал , romanized : Yevropeiskyi val ), and officially called " Project Wall " ( Ukrainian : Проєкт «Стіна» , romanized : Proiekt "Stina" ) in Ukraine , [ 4 ] is a fortified border barrier built on th... | https://en.wikipedia.org/wiki/Russia–Ukraine_barrier |
Rust is an iron oxide , a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture . Rust consists of hydrous iron(III) oxides (Fe 2 O 3 ·nH 2 O) and iron(III) oxide-hydroxide (FeO(OH), Fe(OH) 3 ), and is typically associated with the corrosion of refined ... | https://en.wikipedia.org/wiki/Rust |
Rust converters are chemical solutions or primers that can be applied directly to an iron or iron alloy surface to convert iron oxides ( rust ) into a protective chemical barrier. These compounds interact with iron oxides, especially iron(III) oxide , converting them into an adherent black layer ( black oxide ) that is... | https://en.wikipedia.org/wiki/Rust_converter |
A rusticle is a formation of rust similar to an icicle or stalactite in appearance that occurs deep underwater when iron-loving bacteria attack and oxidize wrought iron and steel . They may be familiar from underwater photographs of shipwrecks , such as the RMS Titanic and the German battleship Bismarck . They have als... | https://en.wikipedia.org/wiki/Rusticle |
Rustproofing is the prevention or delay of rusting of iron and steel objects, or the permanent protection against corrosion . Typically, the protection is achieved by a process of surface finishing or treatment. Depending on mechanical wear or environmental conditions, the degradation may not be stopped completely, unl... | https://en.wikipedia.org/wiki/Rustproofing |
Rustum Roy (July 3, 1924 – August 26, 2010) was a physicist , born in India, who became a professor at Pennsylvania State University and was a leader in materials research . As an advocate for interdisciplinarity , he initiated a movement of materials research societies and, outside of his multiple areas of scientific ... | https://en.wikipedia.org/wiki/Rustum_Roy |
The rusty bolt effect is a form of radio interference due to interactions of the radio waves with dirty connections or corroded parts. [ 1 ] It is more properly known as passive intermodulation , [ 1 ] and can result from a variety of different causes such as ferromagnetic conduction metals, [ 2 ] or nonlinear microwav... | https://en.wikipedia.org/wiki/Rusty_bolt_effect |
Ruth Moufang (10 January 1905 – 26 November 1977) was a German mathematician .
She was born to German chemist Eduard Moufang and Else Fecht Moufang. Eduard Moufang was the son of Friedrich Carl Moufang (1848-1885) from Mainz, and Elisabeth von Moers from Mainz. Ruth Moufang's mother was Else Fecht, who was the daughte... | https://en.wikipedia.org/wiki/Ruth_Moufang |
This page provides supplementary chemical data on ruthenium(IV) oxide .
The handling of this chemical may require notable safety precautions. Safety information can be found on the Material Safety Datasheet ( MSDS ) for this chemical or from a reliable source, such as SIRI . | https://en.wikipedia.org/wiki/Ruthenium(IV)_oxide_(data_page) |
Ruthenium-iridium nanosized corals ( RuIr-NC ) are electrodes consisting of nanosized anisotropic ruthenium - iridium sheets for efficient electrolysis of water in acid discovered in the Kyoto University . [ 1 ] [ 2 ]
The RuIr-NC were discovered unintentionally at the Kyoto University, but then investigated and refine... | https://en.wikipedia.org/wiki/Ruthenium-iridium_nanosized_coral |
This bibliography of Rutherford Aris contains a comprehensive listing of the scientific publications of Aris, including books, journal articles, and contributions to other published material. | https://en.wikipedia.org/wiki/Rutherford_Aris_bibliography |
Rutherford backscattering spectrometry (RBS) is an analytical technique used in materials science . Sometimes referred to as high-energy ion scattering (HEIS) spectrometry, RBS is used to determine the structure and composition of materials by measuring the backscattering of a beam of high energy ions (typically proto... | https://en.wikipedia.org/wiki/Rutherford_backscattering_spectrometry |
Ruy J. Guerra B. de Queiroz (born January 11, 1958, in Recife ) is an associate professor at Universidade Federal de Pernambuco and holds significant works in the research fields of Mathematical logic, proof theory, foundations of mathematics and philosophy of mathematics. [ 1 ] He is the founder of the Workshop on Log... | https://en.wikipedia.org/wiki/Ruy_de_Queiroz |
In mathematics , an R-function , or Rvachev function , is a real-valued function whose sign does not change if none of the signs of its arguments change; that is, its sign is determined solely by the signs of its arguments. [ 1 ] [ 2 ]
Interpreting positive values as true and negative values as false , an R-function i... | https://en.wikipedia.org/wiki/Rvachev_function |
The Rwanda Space Agency (RSA) is Rwanda 's agency for aerospace research and economic development. Its responsibilities include advising the government of Rwanda on space policies, to implement those policies, to promote Rwanda's aerospace industry, and to conduct aerospace research. [ 1 ] It was established in 2021. [... | https://en.wikipedia.org/wiki/Rwanda_Space_Agency |
RxQual is used in GSM and is a part of the Network Measurement Reports (NMR). [ 1 ]
This is an integer value which can be between 0 and 7 and reflects the quality of voice.
0 is the best quality, 7 is the worst.
Each RxQual value corresponds to an estimated number of bit errors in a number of bursts.
There are two t... | https://en.wikipedia.org/wiki/Rxqual |
The Rybczynski theorem was developed in 1955 by the Polish -born English economist Tadeusz Rybczynski (1923–1998). It states that at constant relative goods prices, a rise in the endowment of one factor will lead to a more than proportional expansion of the output in the sector which uses that factor intensively, and a... | https://en.wikipedia.org/wiki/Rybczynski_theorem |
Rydberg ionization spectroscopy is a spectroscopy technique in which multiple photons are absorbed by an atom causing the removal of an electron to form an ion . [ 1 ]
The ionization threshold energy of atoms and small molecules are typically larger than the photon energies that are most easily available experimentall... | https://en.wikipedia.org/wiki/Rydberg_ionization_spectroscopy |
Rydberg matter [ 1 ] is an exotic phase of matter formed by Rydberg atoms ; it was predicted around 1980 by É. A. Manykin , M. I. Ozhovan and P. P. Poluéktov . [ 2 ] [ 3 ] It has been formed from various elements like caesium , [ 4 ] potassium , [ 5 ] hydrogen [ 6 ] [ 7 ] and nitrogen ; [ 8 ] studies have been conducte... | https://en.wikipedia.org/wiki/Rydberg_matter |
A Rydberg molecule is an electronically excited chemical species . Electronically excited molecular states are generally quite different in character from electronically excited atomic states. However, particularly for highly electronically excited molecular systems, the ionic core interaction with an excited electron ... | https://en.wikipedia.org/wiki/Rydberg_molecule |
A Rydberg polaron is an exotic quasiparticle , created at low temperatures, in which a very large atom contains other ordinary atoms in the space between the nucleus and the electrons. [ 1 ] For the formation of this atom, scientists had to combine two fields of atomic physics: Bose–Einstein condensates and Rydberg ato... | https://en.wikipedia.org/wiki/Rydberg_polaron |
The Rydberg states [ 1 ] of an atom or molecule are electronically excited states with energies that follow the Rydberg formula as they converge on an ionic state with an ionization energy . Although the Rydberg formula was developed to describe atomic energy levels, it has been used to describe many other systems tha... | https://en.wikipedia.org/wiki/Rydberg_state |
Ryōji Noyori ( 野依 良治 , Noyori Ryōji , born September 3, 1938) is a Japanese chemist . He won the Nobel Prize in Chemistry in 2001, Noyori shared a half of the prize with William S. Knowles for the study of chirally catalyzed hydrogenations ; the second half of the prize went to K. Barry Sharpless for his study in chira... | https://en.wikipedia.org/wiki/Ryōji_Noyori |
In information theory , the Rényi entropy is a quantity that generalizes various notions of entropy , including Hartley entropy , Shannon entropy , collision entropy , and min-entropy . The Rényi entropy is named after Alfréd Rényi , who looked for the most general way to quantify information while preserving additivit... | https://en.wikipedia.org/wiki/Rényi_entropy |
The Résal effect (named after the French engineer Louis-Jean Résal ) is a structural engineering term which refers to the way the compressive force acting on a flange of a tapered beam reduces the effective shear force acting on the beam. [ 1 ] [ 2 ]
This article about a civil engineering topic is a stub . You can hel... | https://en.wikipedia.org/wiki/Résal_effect |
The Römpp Encyclopedia Natural Products is an encyclopedia of natural products written by German chemists who specialize in this area of science. It is published by Thieme Medical Publishers . [ 1 ] [ 2 ]
This Germany -related article is a stub . You can help Wikipedia by expanding it .
This article about a chemistry... | https://en.wikipedia.org/wiki/Römpp_Encyclopedia_Natural_Products |
The Röntgen equivalent physical or rep (symbol rep ) is a legacy unit of absorbed dose first introduced by Herbert Parker in 1945 to replace an improper application of the roentgen unit to biological tissue. [ 1 ] It is the absorbed energetic dose before the biological efficiency of the radiation is factored in. The re... | https://en.wikipedia.org/wiki/Röntgen_equivalent_physical |
The Rössler Prize , offered by the ETH Zurich Foundation , is a monetary prize that has been awarded annually since 2009 to a promising young tenured professor of the ETH Zurich in the middle of an accelerating career. [ 1 ] The prize of 200,000 Swiss Francs is financed by the returns from an endowment made by Max Röss... | https://en.wikipedia.org/wiki/Rössler_Prize |
The Rüchardt experiment , [ 1 ] [ 2 ] [ 3 ] invented by Eduard Rüchardt , is a famous experiment in thermodynamics , which determines the ratio of the molar heat capacities of a gas, i.e. the ratio of C p {\displaystyle C_{\text{p}}} (heat capacity at constant pressure) and C V {\displaystyle C_{\text{V}}} (heat capaci... | https://en.wikipedia.org/wiki/Rüchardt_experiment |
S -(2-Aminoethyl)isothiourea dihydrobromide , [ 2 ] commonly knwn as AET , is a isothiouronium -group-containing reducing agent with textbook uses as a disulfide reducing agent. Though it does not have a free thiol group (-SH) like 2-mercaptoethanol and dithiothreitol (DTT), it reacts with water to decompose transientl... | https://en.wikipedia.org/wiki/S-(2-Aminoethyl)isothiuronium_bromide_hydrobromide |
S-100 is an electronic nautical chart data format standard, first published by the IHO in 2010. [ 1 ] Development was begun in 2001. [ 2 ] S-100 has a number of child standards covering related areas, [ 1 ] including
This computing article is a stub . You can help Wikipedia by expanding it .
This article about a spec... | https://en.wikipedia.org/wiki/S-100_(chart) |
S-200 is a bioremediation product used to clean up oil spills . It is an oleophilic nitrogen-phosphorus nutrient that promotes the growth of micro-organisms that degrade hydrocarbons (such as oil and fuel). S-200 bonds to the hydrocarbon to eliminate the need to reapply in tidal or rain events. S-200 is identified a... | https://en.wikipedia.org/wiki/S-200_(bioremediation) |
S -Acylation is the process of chemically linking a molecule to another molecule via a thioester bond. [ 1 ] Protein S -acylation is a sub-type of S -acylation where the first of those molecules is a protein , and connected to the second through a cysteine amino acid . [ 1 ] A prominent type of protein S -acylation is ... | https://en.wikipedia.org/wiki/S-Acylation |
S -Adenosyl- L -homocysteine ( SAH ) is the biosynthetic precursor to homocysteine . [ 1 ] SAH is formed by the demethylation of S -adenosyl- L -methionine . [ 2 ] [ 3 ] Adenosylhomocysteinase converts SAH into homocysteine and adenosine .
DNA methyltransferases are inhibited by SAH. [ 4 ] Two S -adenosyl- L -homocyst... | https://en.wikipedia.org/wiki/S-Adenosyl-L-homocysteine |
S -Adenosylmethioninamine is a substrate that is required for the biosynthesis of polyamines including spermidine , spermine , and thermospermine . [ 1 ] It is produced by decarboxylation of S -adenosyl methionine .
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/S-Adenosylmethioninamine |
S -Adenosylmethionine synthetase ( EC 2.5.1.6 ), also known as methionine adenosyltransferase ( MAT ), is an enzyme that creates S -adenosylmethionine (also known as AdoMet, SAM or SAMe) by reacting methionine (a non-polar amino acid ) and ATP (the basic currency of energy). [ 1 ]
AdoMet is a methyl donor for transmet... | https://en.wikipedia.org/wiki/S-Adenosylmethionine_synthetase_enzyme |
Simultaneous GPS ( S-GPS ) is a method to allow a GPS reception and CDMA communications to operate simultaneously in a mobile phone.
Ordinarily, cellular geolocation and a built-in GPS receiver is used to determine the location of an E911 call made from CDMA phones. By using a time-multiplexed scheme called TM-GPS , ... | https://en.wikipedia.org/wiki/S-GPS |
S-LINK , for simple link interface , is a high-performance data acquisition standard developed at CERN for collecting information from particle accelerators and other sources. Unlike similar systems, S-LINK is based on the idea that data will be collected and stored by computers at both ends of the link, as opposed to ... | https://en.wikipedia.org/wiki/S-LINK |
S -Methyl methanethiosulfonate , also known as MMTS , is an organosulfur compound with the chemical formula C H 3 − S O 2 −S−CH 3 . It is the S - methyl ester of methanethiosulfonic acid. It is a colorless liquid. It is obtained by condensaton of methanesulfonic acid with methanethiol . [ 1 ]
It has a role as a human ... | https://en.wikipedia.org/wiki/S-Methyl_methanethiosulfonate |
S -Methylcysteine is the amino acid with the nominal formula CH 3 SCH 2 CH(NH 2 )CO 2 H. It is the S-methylated derivative of cysteine . This amino acid occurs widely in plants, including many edible vegetables. [ 1 ]
S-Methylcysteine is not genetically coded, but it arises by post-translational methylation of cystei... | https://en.wikipedia.org/wiki/S-Methylcysteine |
S -Methylmethionine (SMM) is a derivative of methionine with the chemical formula ( CH 3 ) 2 S + CH 2 CH 2 CH(NH 3 + )CO 2 − . This cation is a naturally-occurring intermediate in many biosynthetic pathways owing to the sulfonium functional group . It is biosynthesized from L -methionine and S -adenosylmethionine by th... | https://en.wikipedia.org/wiki/S-Methylmethionine |
In organic chemistry , S -nitrosothiols , also known as thionitrites , are organic compounds or functional groups containing a nitroso group attached to the sulfur atom of a thiol . [ 1 ] S -Nitrosothiols have the general formula R−S−N=O , where R denotes an organic group.
S -Nitrosothiols have received much attention... | https://en.wikipedia.org/wiki/S-Nitrosothiol |
In biochemistry , S -nitrosylation is the covalent attachment of a nitric oxide group ( −NO ) to a cysteine thiol within a protein to form an S -nitrosothiol (SNO). S -Nitrosylation has diverse regulatory roles in bacteria , yeast and plants and in all mammalian cells . [ 1 ] It thus operates as a fundamental mechanism... | https://en.wikipedia.org/wiki/S-Nitrosylation |
The S-Series of ILS specifications is a common denominator for a set of specifications associated to different integrated logistics support aspects. [ 1 ] Originally developed by AECMA (French acronym for the Association Européenne des Constructeurs de Matériel Aeronautique, later ASD), the S-Series suite of ILS specif... | https://en.wikipedia.org/wiki/S-Series_of_ILS_specifications |
In nuclear physics , the astrophysical S -factor S ( E ) is a rescaling of a nuclear reaction 's total cross section σ ( E ) to account for the Coulomb repulsion between the charged reactants. It determines the rates of nuclear fusion reactions that occur in the cores of stars .
The quantity is defined as [ 1 ]
where... | https://en.wikipedia.org/wiki/S-factor |
S -matrix theory was a proposal for replacing local quantum field theory as the basic principle of elementary particle physics .
It avoided the notion of space and time by replacing it with abstract mathematical properties of the S -matrix . In S -matrix theory, the S -matrix relates the infinite past to the infinite ... | https://en.wikipedia.org/wiki/S-matrix_theory |
The S-procedure or S-lemma is a mathematical result that gives conditions under which a particular quadratic inequality is a consequence of another quadratic inequality. The S-procedure was developed independently in a number of different contexts [ 1 ] [ 2 ] and has applications in control theory , linear algebra and ... | https://en.wikipedia.org/wiki/S-procedure |
The slow neutron-capture process , or s -process , is a series of reactions in nuclear astrophysics that occur in stars, particularly asymptotic giant branch stars . The s -process is responsible for the creation ( nucleosynthesis ) of approximately half the atomic nuclei heavier than iron .
In the s -process, a seed ... | https://en.wikipedia.org/wiki/S-process |
S.Pellegrino ( Italian pronunciation: [sampelleˈɡriːno] ) is an Italian natural mineral water brand, owned by the company Sanpellegrino S.p.A , part of Swiss company Nestlé since 1997. The principal production plant is located in San Pellegrino Terme in the Province of Bergamo, Lombardy , Italy. Its products are export... | https://en.wikipedia.org/wiki/S.Pellegrino |
Søren Peter Lauritz Sørensen (9 January 1868 – 12 February 1939) was a Danish chemist , known for the introduction of the concept of pH , a scale for measuring acidity and alkalinity .
Sørensen was born in Havrebjerg in 1868 as the son of a farmer. He began his studies at the University of Copenhagen at the age of 18.... | https://en.wikipedia.org/wiki/S._P._L._Sørensen |
S/2015 (136472) 1 , unofficially nicknamed MK2 by the discovery team, [ 2 ] is the only known moon of the trans-Neptunian dwarf planet Makemake . [ 1 ] [ 4 ] It is estimated to be 175 km (110 mi) in diameter and has a semi-major axis of at least 21,000 km (13,000 mi) from Makemake. [ 1 ] Its orbital period is at least ... | https://en.wikipedia.org/wiki/S/2015_(136472)_1 |
S1909/A2840 is a bill that was passed by the New Jersey Legislature in December 2003, and signed into law by Governor James McGreevey on January 4, 2004, that permits human cloning for the purpose of developing and harvesting human stem cells . Specifically, it legalizes the process of cloning a human embryo, and impl... | https://en.wikipedia.org/wiki/S1909/A2840 |
Asparagusic acid is an organosulfur compound with the molecular formula C 4 H 6 O 2 S 2 and systematically named 1,2-dithiolane-4-carboxylic acid. The molecule consists of a heterocyclic disulfide functional group (a 1,2- dithiolane ) with a carboxylic acid side chain. It is found in asparagus and is believed to be t... | https://en.wikipedia.org/wiki/S2(CH2)2CHCO2H |
Disulfur dibromide is the inorganic compound with the formula S 2 Br 2 . It is a yellow-brown liquid that fumes in air. It is prepared by direct combination of the elements and purified by vacuum distillation. [ 3 ] Higher yields can be obtained from disulfur dichloride and 50% aqueous hydrobromic acid , but the produc... | https://en.wikipedia.org/wiki/S2Br2 |
Disulfur dichloride (or disulphur dichloride by the British English spelling) is the inorganic compound of sulfur and chlorine with the formula S 2 Cl 2 . [ 4 ] [ 5 ] [ 6 ] [ 7 ] It is an amber oily liquid.
Sometimes, this compound is incorrectly named sulfur monochloride (or sulphur monochloride by the British Englis... | https://en.wikipedia.org/wiki/S2Cl2 |
Disulfur decafluoride is a chemical compound with the formula S 2 F 10 . It was discovered in 1934 by Denbigh and Whytlaw-Gray. [ 4 ] Each sulfur atom of the S 2 F 10 molecule is octahedral , and surrounded by five fluorine atoms [ 5 ] and one sulfur atom. The two sulfur atoms are connected by a single bond. In the S 2... | https://en.wikipedia.org/wiki/S2F10 |
1,1,1,2-tetrafluorodisulfane , also known as 1,2-difluorodisulfane 1,1-difluoride or just difluorodisulfanedifluoride ( FSSF 3 ) is an unstable molecular compound of fluorine and sulfur . The molecule has a pair of sulfur atoms, with one fluorine atom on one sulfur, and three fluorine atoms on the other. It has the unc... | https://en.wikipedia.org/wiki/S2F4 |
Disulfur dioxide , dimeric sulfur monoxide or SO dimer is an oxide of sulfur with the formula S 2 O 2 . [ 2 ] The solid is unstable with a lifetime of a few seconds at room temperature. [ 3 ]
Disulfur dioxide adopts a cis planar structure with C 2v symmetry . The S−O bond length is 145.8 pm, shorter than in sulfur mon... | https://en.wikipedia.org/wiki/S2O2 |
Thiosulfate ( IUPAC-recommended spelling ; sometimes thiosulphate in British English) is an oxyanion of sulfur with the chemical formula S 2 O 2− 3 . Thiosulfate also refers to the compounds containing this anion, which are the salts of thiosulfuric acid , such as sodium thiosulfate Na 2 S 2 O 3 and ammonium thiosulfat... | https://en.wikipedia.org/wiki/S2O3 |
The dithionite is the oxyanion with the formula [S 2 O 4 ] 2− . [ 1 ] It is commonly encountered as the salt sodium dithionite . For historical reasons, it is sometimes called hydrosulfite , but it contains no hydrogen and is not a sulfite . [ 2 ] The dianion has a steric number of 4 and trigonal pyramidal geometry.
... | https://en.wikipedia.org/wiki/S2O4 |
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