text stringlengths 11 320k | source stringlengths 26 161 |
|---|---|
The 2cDM model , or two-component dark matter model, is a type of beyond-the-standard-model (BSM) theory that proposes the existence of two different types of dark matter components in cosmology . Unlike the standard cold dark matter (CDM) model, which assumes a single type of dark matter particle , a 2cDM model sugges... | https://en.wikipedia.org/wiki/2cDM_model_of_dark_matter |
2degrees is a New Zealand full service telecommunications provider . It's the third-largest wireless carrier in New Zealand , with 1.6 million subscribers as of May 2021. [ 4 ] Since launching its mobile network , 2degrees broke up the New Zealand mobile duopoly halving the price of Prepay overnight. 2degrees offers se... | https://en.wikipedia.org/wiki/2degrees |
The 2nd Navigation Warfare Squadron ( 2 NWS ) is a United States Space Force unit responsible for operating the Global Positioning System (GPS) satellite constellation , which provides global navigation, time transfer, and nuclear detonation detection. It is a component of Space Operations Command 's Positioning, Navig... | https://en.wikipedia.org/wiki/2nd_Navigation_Warfare_Squadron |
2α-Mannobiose is a disaccharide . It is formed by a condensation reaction , when two mannose molecules react together, in the formation of a glycosidic bond .
This article about an organic compound is a stub . You can help Wikipedia by expanding it .
This biochemistry article is a stub . You can help Wikipedia by exp... | https://en.wikipedia.org/wiki/2α-Mannobiose |
In mathematics , the 2 π theorem of Gromov and Thurston states a sufficient condition for Dehn filling on a cusped hyperbolic 3-manifold to result in a negatively curved 3-manifold.
Let M be a cusped hyperbolic 3-manifold. Disjoint horoball neighborhoods of each cusp can be selected. The boundaries of these neighbor... | https://en.wikipedia.org/wiki/2π_theorem |
3' mRNA-seq is a quantitative, genome-wide transcriptomic technique based on the barcoding of the 3' untranslated region (UTR) of mRNA molecules. Unlike standard bulk RNA-seq , where short sequencing reads are generated along the entire length of mRNA transcripts, only the 3' end of polyadenylated RNAs are sequenced in... | https://en.wikipedia.org/wiki/3'_mRNA-seq |
The 3,000 mile myth refers to a common belief, particularly in the United States, that all motor vehicles should have their motor oil changed at least every 3,000 miles (4,800 km) to maintain their car engine. Efforts are under way to convince the public that this is not necessary and that people should follow the advi... | https://en.wikipedia.org/wiki/3,000_mile_myth |
3,3-Diphenyl-3H-naphthopyran is an organic compound that is the parent of several related naphthopyrans. This family of compounds are used as photochromic dyes in ophthalmic glasses . [ 1 ] The compound is a colorless solid.
The synthesis of naphthopyrans starts with 2-naphthol . [ 2 ]
Upon exposure to UV-radiation,... | https://en.wikipedia.org/wiki/3,3-Diphenyl-3H-naphthopyran |
3-Amino-1,2,4-triazole ( 3-AT ) is a heterocyclic organic compound that consists of 1,2,4-triazole with an amino group as a substituent .
3-AT is a competitive inhibitor of the product of the HIS3 gene, imidazoleglycerol-phosphate dehydratase . [ 3 ] [ 4 ] Imidazoleglycerol-phosphate dehydratase is an enzyme catalyzin... | https://en.wikipedia.org/wiki/3-Amino-1,2,4-triazole |
3-Aminoisobutyric acid (also known as β-aminoisobutyric acid or BAIBA ) is a product formed by the catabolism of thymine .
During exercise, the increase of PGC-1α protein triggers the secretion of BAIBA from exercising muscles into the blood (concentration 2 to 3 μM in human serum). When BAIBA reaches white fat tissue... | https://en.wikipedia.org/wiki/3-Aminoisobutyric_acid |
3-Arylpropiolonitriles (APN) belong to a class of electron-deficient alkyne derivatives substituted by two electron-withdrawing groups – a nitrile and an aryl moieties. Such activation results in improved selectivity towards highly reactive thiol-containing molecules, namely cysteine residues in proteins . APN-based m... | https://en.wikipedia.org/wiki/3-Arylpropiolonitriles |
3-Azidocoumarin is an organic compound that is used in the area of bioconjugation . It is a derivative of coumarin , a natural product and precursor for the widely used Coumadin . Azidocoumarin has emerged as a widely applicable labeling agent in diverse biological systems. In particular, it participates in the aptly n... | https://en.wikipedia.org/wiki/3-Azidocoumarin |
3-Carboxy- cis , cis -muconic acid is a metabolite of the catechin degradation by Bradyrhizobium japonicum . [ 2 ]
The enzyme 3-carboxy- cis , cis -muconate cycloisomerase uses 2-carboxy-2,5-dihydro-5-oxofuran-2-acetate to produce 3-carboxy- cis , cis -muconate.
The enzyme carboxy- cis , cis -muconate cyclase uses 3-... | https://en.wikipedia.org/wiki/3-Carboxy-cis,cis-muconic_acid |
The 3-Hydroxypropionate/4-hydroxybutyrate cycle , also known as the 3HP/4HB cycle , is a specialized carbon fixation process used by some archaea , including Thermoproteota . [ 1 ] For these organisms to survive and grow autotrophically in hostile settings, such as hydrothermal vents , this cycle is essential. [ 2 ] Ca... | https://en.wikipedia.org/wiki/3-Hydroxypropionate/4-hydroxybutyrate_cycle |
Many photosynthetic life forms (plants, algae, phototrophic and chemoautotrophic bacteria , and archaea) require a way to utilize carbon into their metabolic pathways. This usually occurs in pathways that fix carbon from carbon dioxide (CO 2 ) . In the 3-hydroxypropionate bicycle , photosynthetic organisms like Chlorof... | https://en.wikipedia.org/wiki/3-Hydroxypropionate_bicycle |
3-Indolepropionic acid ( IPA ), or indole-3-propionic acid , has been studied for its therapeutic value in the treatment of Alzheimer's disease . As of 2022 [ 3 ] IPA shows potential in the treatment of this disease, though the therapeutic effect of IPA depends on dose and time of therapy initiation.
Though promising ... | https://en.wikipedia.org/wiki/3-Indolepropionic_acid |
3-Iodophenol ( m -iodophenol ) is an aromatic organic compound. 3-Iodophenol participates in a variety of coupling reactions in which the iodide substituent is displaced. [ 4 ] Well cited examples include thiolate [ 5 ] and amine nucleophiles. [ 6 ]
3-Iodophenol can be prepared by oxidative decarboxylation of 3-iodobe... | https://en.wikipedia.org/wiki/3-Iodophenol |
3-Methyl-3-sulfanylhexan-1-ol is a primary alcohol that is hexan-1-ol which is substituted by a methyl group and a thiol group at position 3. It is the odor component of human axilla sweat and the major species at pH 7.3. [ 2 ]
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/3-Methyl-3-sulfanylhexan-1-ol |
3-Methylfentanyl (3-MF, mefentanyl) is an opioid analgesic that is an analog of fentanyl . 3-Methylfentanyl is one of the most potent opioids, estimated to be between 400 and 6000 times stronger than morphine , [ 1 ] depending on which isomer is used (with the cis isomers being the more potent ones). [ 2 ] [ 3 ]
3-met... | https://en.wikipedia.org/wiki/3-Methylfentanyl |
3-Methylglutaconyl-CoA ( MG-CoA ), also known as β-methylglutaconyl-CoA , is an intermediate in the metabolism of leucine . [ 1 ] [ 2 ] [ 3 ] It is metabolized into HMG-CoA .
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/3-Methylglutaconyl-CoA |
3-Methylhistidine ( 3-MH ) is a post-translationally modified amino acid which is excreted in human urine . [ 1 ] [ 2 ] Urinary concentration of 3-methylhistidine is a biomarker for skeletal muscle protein breakdown in humans who have been subject to muscle injury. [ 1 ] [ 3 ] [ 4 ] Urinary 3-methylhistidine concentrat... | https://en.wikipedia.org/wiki/3-Methylhistidine |
3-Nitrobenzanthrone (3-nitro-7 H -benz[de]anthracen-7-one) is a chemical compound emitted in diesel exhaust ; it is a potent carcinogen . [ 2 ] It produced the highest score ever reported in the Ames test , a standard measure of the cancer-causing potential of toxic chemicals, far greater than the previous known strong... | https://en.wikipedia.org/wiki/3-Nitrobenzanthrone |
3-Oxoacyl-CoA is a group of coenzymes involved in the metabolism of fatty acids . [ 1 ]
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/3-Oxoacyl-CoA |
3-Phosphoglyceric acid ( 3PG , 3-PGA , or PGA ) is the conjugate acid of 3-phosphoglycerate or glycerate 3-phosphate ( GP or G3P ). [ 1 ] This glycerate is a biochemically significant metabolic intermediate in both glycolysis and the Calvin-Benson cycle . The anion is often termed as PGA when referring to the Calvin-Be... | https://en.wikipedia.org/wiki/3-Phosphoglyceric_acid |
In quantum mechanics , the Wigner's 3-j symbols , also called 3 -jm symbols, are an alternative to Clebsch–Gordan coefficients for the purpose of adding angular momenta. [ 1 ] While the two approaches address exactly the same physical problem, the 3- j symbols do so more symmetrically.
The 3- j symbols are given in te... | https://en.wikipedia.org/wiki/3-j_symbol |
In optimization, 3-opt is a simple local search heuristic for finding approximate solutions to the travelling salesperson problem and related network optimization problems. Compared to the simpler 2-opt algorithm, it is slower but can generate higher-quality solutions.
3-opt analysis involves deleting three edges from... | https://en.wikipedia.org/wiki/3-opt |
34βE12 , often written as 34betaE12 and also known as CK34βE12 and keratin 903 ( CK903 ), is an antibody specific for high molecular weight cytokeratins 1 , 5 , 10 and 14 . [ 1 ] [ 2 ]
It is sometimes, less precisely, referred to as high-molecular weight keratin ( HMWK ) and high-molecular weight cytokeratin ( HMWCK )... | https://en.wikipedia.org/wiki/34βE12 |
365 Days of Astronomy is an educational podcast , inspired by the International Year of Astronomy , published daily beginning in 2009. It is produced as a collaboration between Southern Illinois University Edwardsville and Astrosphere New Media Association. [ 1 ] [ 2 ] The individual episodes are written, recorded, and... | https://en.wikipedia.org/wiki/365_Days_of_Astronomy |
3D-Jury is a metaserver that aggregates and compares models from various protein structure prediction servers. [ 1 ]
The 3D-Jury algorithm takes in groups of predictions made by a collection of servers and assigns each pair a 3D-Jury score, based on structural similarity. To improve accuracy of the final model, users ... | https://en.wikipedia.org/wiki/3D-Jury |
The 3DBenchy is a 3D computer model specifically designed for testing the accuracy and capabilities of 3D printers . [ 1 ] The 3DBenchy is described by its creator, Creative Tools, as "the jolly 3D printing torture-test " and was released (initially only in STL format ) in April 2015, with a multi-part, multi-colour mo... | https://en.wikipedia.org/wiki/3DBenchy |
3DISCO (stands for “3D imaging of solvent-cleared organs“) [ 1 ] is a histological method that make biological samples more transparent (so called “cleared”) by using series of organic solvents for matching the refractive index (RI) of the tissues with that of the surrounding medium. Structures in transparent tissues ... | https://en.wikipedia.org/wiki/3DISCO |
3DMark is a computer benchmarking tool created and developed by UL (formerly Futuremark ), to determine the performance of a computer's 3D graphic rendering and CPU workload processing capabilities. Running 3DMark produces a 3DMark score, with higher numbers indicating better performance. The 3DMark measurement unit is... | https://en.wikipedia.org/wiki/3DMark |
A 3D Content Retrieval system is a computer system for browsing, searching and retrieving three dimensional digital contents (e.g.: Computer-aided design , molecular biology models, and cultural heritage 3D scenes, etc.) from a large database of digital images. The most original way of doing 3D content retrieval uses ... | https://en.wikipedia.org/wiki/3D_Content_Retrieval |
Three dimensional ( 3D ) bioprinting is the use of 3D printing –like techniques to combine cells , growth factors , bio-inks , and biomaterials to fabricate functional structures that were traditionally used for tissue engineering applications but in recent times have seen increased interest in other applications such ... | https://en.wikipedia.org/wiki/3D_bioprinting |
A 3D cell culture is an artificially created environment in which biological cells are permitted to grow or interact with their surroundings in all three dimensions. Unlike 2D environments (e.g. a Petri dish ), a 3D cell culture allows cells in vitro to grow in all directions, similar to how they would in vivo . [ 1 ] ... | https://en.wikipedia.org/wiki/3D_cell_culture |
The Magnetic Levitation Method (MLM) is a technique for growing 3D cell cultures . In this approach, cells are treated with magnetic nanoparticles and exposed to spatially varying magnetic fields produced by neodymium magnetic drivers. The process causes cells to levitate to the air-liquid interface within a standard p... | https://en.wikipedia.org/wiki/3D_cell_culturing_by_magnetic_levitation |
3D concrete printing , or simply concrete printing , refers to digital fabrication processes for cementitious materials based on one of several different 3D printing technologies. 3D-printed concrete eliminates the need for formwork, reducing material waste and allowing for greater geometric freedom in complex structur... | https://en.wikipedia.org/wiki/3D_concrete_printing |
In geology, 3D fold evolution is the study of the full three dimensional structure of a fold as it changes in time. A fold is a common three-dimensional geological structure that is associated with strain deformation under stress . Fold evolution in three dimensions can be broadly divided into two stages, namely fold g... | https://en.wikipedia.org/wiki/3D_fold_evolution |
3D metal moulding , also referred to as metal injection moulding or ( MIM ), is used to manufacture components with complex geometries. The process uses a mixture of metal powders and polymer binders – also known as "feedstock" – which are then injection moulded .
After moulding, the parts are thermally processed in o... | https://en.wikipedia.org/wiki/3D_metal_moulding |
Three-dimensional (3D) microfabrication refers to manufacturing techniques that involve the layering of materials to produce a three-dimensional structure at a microscopic scale. [ 1 ] These structures are usually on the scale of micrometers and are popular in microelectronics and microelectromechanical systems .
Much... | https://en.wikipedia.org/wiki/3D_microfabrication |
In theoretical physics, 3D mirror symmetry is a version of mirror symmetry in 3-dimensional gauge theories with N=4 supersymmetry , or 8 supercharges . It was first proposed by Kenneth Intriligator and Nathan Seiberg , in their 1996 paper "Mirror symmetry in three-dimensional gauge theories", [ 1 ] as a relation betwee... | https://en.wikipedia.org/wiki/3D_mirror_symmetry |
3D optical data storage is any form of optical data storage in which information can be recorded or read with three-dimensional resolution (as opposed to the two-dimensional resolution afforded, for example, by CD ). [ 1 ] [ 2 ]
This innovation has the potential to provide petabyte -level mass storage on DVD -sized di... | https://en.wikipedia.org/wiki/3D_optical_data_storage |
3D pose estimation is a process of predicting the transformation of an object from a user-defined reference pose, given an image or a 3D scan . It arises in computer vision or robotics where the pose or transformation of an object can be used for alignment of a computer-aided design models, identification, grasping , ... | https://en.wikipedia.org/wiki/3D_pose_estimation |
A 3D projection (or graphical projection ) is a design technique used to display a three-dimensional (3D) object on a two-dimensional (2D) surface. These projections rely on visual perspective and aspect analysis to project a complex object for viewing capability on a simpler plane.
3D projections use the primary qual... | https://en.wikipedia.org/wiki/3D_projection |
3D ultrasound is a medical ultrasound technique, often used in fetal, cardiac, trans-rectal and intra-vascular applications. 3D ultrasound refers specifically to the volume rendering of ultrasound data. When involving a series of 3D volumes collected over time, it can also be referred to as 4D ultrasound (three spatial... | https://en.wikipedia.org/wiki/3D_ultrasound |
3G MIMO describes MIMO techniques which have been considered as 3G standard techniques.
MIMO , as the state of the art of intelligent antenna (IA), improves the performance of radio systems by embedding electronics intelligence into the spatial processing unit. Spatial processing includes spatial precoding at the tran... | https://en.wikipedia.org/wiki/3G_MIMO |
3G mobile telephony was relatively slow to be adopted globally. In some instances, 3G networks do not use the same radio frequencies as 2G so mobile operators must build entirely new networks and license entirely new frequencies, especially so to achieve high data transmission rates. Other delays were due to the expens... | https://en.wikipedia.org/wiki/3G_adoption |
Tritium (from Ancient Greek τρίτος (trítos) ' third ' ) or hydrogen-3 (symbol T or 3 H ) is a rare and radioactive isotope of hydrogen with a half-life of ~12.33 years. The tritium nucleus (t, sometimes called a triton ) contains one proton and two neutrons , whereas the nucleus of the common isotope hydrogen-1 ( proti... | https://en.wikipedia.org/wiki/3H |
Juno ( minor-planet designation : 3 Juno ) is a large asteroid in the asteroid belt . Juno was the third asteroid discovered, in 1804, by German astronomer Karl Harding . [ 15 ] It is tied with three other asteroids as the thirteenth largest asteroid , and it is one of the two largest stony ( S-type ) asteroids, along ... | https://en.wikipedia.org/wiki/3_Juno |
In algebra , the 3 x + 1 semigroup is a special subsemigroup of the multiplicative semigroup of all positive rational numbers . [ 1 ] The elements of a generating set of this semigroup are related to the sequence of numbers involved in the still open Collatz conjecture or the "3 x + 1 problem". The 3 x + 1 semigroup ha... | https://en.wikipedia.org/wiki/3x_+_1_semigroup |
3α-Etiocholanediol , or simply etiocholanediol , also known as 3α,5β-androstanediol or as etiocholane-3α,17β-diol , is a naturally occurring etiocholane (5β-androstane) steroid and an endogenous metabolite of testosterone . It is formed from 5β-dihydrotestosterone (after 5β-reduction of testosterone) and is further tra... | https://en.wikipedia.org/wiki/3α-Etiocholanediol |
3β-Etiocholanediol , or epietiocholanediol , also known as 3β,5β-androstanediol or as etiocholane-3β,17β-diol , is a naturally occurring etiocholane (5β-androstane) steroid and an endogenous metabolite of testosterone . It is formed from 5β-dihydrotestosterone (after 5β-reduction of testosterone) and is transformed int... | https://en.wikipedia.org/wiki/3β-Etiocholanediol |
3β-Hydroxysteroid dehydrogenase/Δ 5-4 isomerase ( 3β-HSD ) ( EC 1.1.1.145 ) is an enzyme that catalyzes the biosynthesis of the steroid progesterone from pregnenolone , 17α-hydroxyprogesterone from 17α-hydroxypregnenolone , and androstenedione from dehydroepiandrosterone (DHEA) in the adrenal gland . It is the only enz... | https://en.wikipedia.org/wiki/3β-Hydroxysteroid_dehydrogenase |
The 3ω-method (3 omega method) or 3ω-technique, is a measurement method for determining the thermal conductivities of bulk material (i.e. solid or liquid) and thin layers. The process involves a metal heater applied to the sample that is heated periodically. The temperature oscillations thus produced are then measured.... | https://en.wikipedia.org/wiki/3ω-method |
The [4+4] Photocycloaddition is a cycloaddition reaction in which two unsaturated molecules connect via four atoms from each molecule (hence "4 + 4") to create an eight-membered ring. As a photochemical reaction , it is promoted by some form of light, as opposed to a thermal process.
The earliest example of a [4+4] ph... | https://en.wikipedia.org/wiki/4+4_Photocycloaddition |
4,4’-Dinitro-3,3’-diazenofuroxan ( DDF ) is a powerful experimental high explosive , with performance comparable to that of other high-density high-explosives such as octanitrocubane . It is synthesised by oxidative coupling of 4-amino-3-(azidocarbonyl) furoxan followed by Curtius rearrangement and further oxidation. [... | https://en.wikipedia.org/wiki/4,4'-Dinitro-3,3'-diazenofuroxan |
4,4′-Thiodianiline (TDA) is the organosulfur compound with the formula (H2NC6H4)2S. It is classified as a diamine and a thioether . It typically appears as an (off-)white solid powder. An analogue of TDA is the drug dapsone , for which the sulphur species is oxidised.
Sulfur is boiled in excess aniline over several ... | https://en.wikipedia.org/wiki/4,4'-Thiodianiline |
4,4′-Diamino-2,2′-stilbenedisulfonic acid is the organic compound with the formula (H 2 NC 6 H 3 SO 3 H) 2 C 2 H 2 . It is a white, water-soluble solid. Structurally, it is a derivative of trans- stilbene , containing amino and sulfonic acid functional groups on each of the two phenyl rings .
The compound is a popul... | https://en.wikipedia.org/wiki/4,4′-Diamino-2,2′-stilbenedisulfonic_acid |
4,5-Dihydroorotic acid is a derivative of orotic acid which serves as an intermediate in pyrimidine biosynthesis . [ 1 ]
This article about a heterocyclic compound is a stub . You can help Wikipedia by expanding it .
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/4,5-Dihydroorotic_acid |
4,5-Dihydroxy-2,3-pentanedione (DPD) is an organic compound that occurs naturally but exists as several related structures. The idealized formula for this species is CH 3 C(O)C(O)CH(OH)CH 2 OH, but it is known to exist as several other forms resulting from cyclization. It is not stable at room temperature as a pure m... | https://en.wikipedia.org/wiki/4,5-Dihydroxy-2,3-pentanedione |
4-(γ-Glutamylamino)butanoic acid is molecule that consists of L -glutamate conjugated to γ-aminobutyric acid (GABA). It is the substrate of the enzyme γ-glutamyl-γ-aminobutyrate hydrolase , which is involved in the biosynthesis of polyamines . [ 2 ]
This biochemistry article is a stub . You can help Wikipedia by expan... | https://en.wikipedia.org/wiki/4-(γ-Glutamylamino)butanoic_acid |
In computing and electronic systems, binary-coded decimal ( BCD ) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits , usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).
In byte -oriented sys... | https://en.wikipedia.org/wiki/4-2-2-1_code |
4-acetamido-TEMPO (short for (4-acetamido-2,2,6,6-tetramethylpiperidin-1-yl)oxyl ) is a stable radical used for oxidation reactions in organic chemistry . It is a derivative of TEMPO , from which it differs by the additional acetamide group.
4-acetamido-TEMPO can be prepared from 4-amino-2,2,6,6-tetramethylpiperidine ... | https://en.wikipedia.org/wiki/4-Acetamido-TEMPO |
Within the field of biochemistry , 4-amino-5-hydroxymethyl-2-methylpyrimidine ( HMP ) also known as toxopyrimidine together with its mono phosphate ( HMP-P ) and pyrophosphate ( HMP-PP ) esters are biogenetic precursors to the important biochemical cofactor thiamine pyrophosphate (TPP), a derivative of thiamine (vitami... | https://en.wikipedia.org/wiki/4-Amino-5-hydroxymethyl-2-methylpyrimidine |
4-Aminopyridine ( 4-AP ) is an organic compound with the chemical formula H 2 NC 5 H 4 N . It is one of the three isomeric aminopyridines . It is used as a research tool in characterizing subtypes of the potassium channel . It has also been used as a drug , to manage some of the symptoms of multiple sclerosis , [ 7 ... | https://en.wikipedia.org/wiki/4-Aminopyridine |
4-Caffeoyl-1,5-quinide ( 4-caffeoylquinic-1,5-lactone or 4-CQL ) is found in roasted coffee beans. It is formed by lactonization of 4- O - caffeoylquinic acid during the roasting process. [ 1 ]
It is reported to possess opioid antagonist properties in mice . [ 2 ]
This article about an organic compound is a stub . Yo... | https://en.wikipedia.org/wiki/4-Caffeoyl-1,5-quinide |
4-Chloro- o -toluidine ( 4-COT , 4-chloro-2-methylaniline ) is the organic compound with the formula CH 3 C 6 H 3 Cl(NH 2 ). It is a colorless solid. The compound is produced as an intermediate to the pesticide chlordimeform and a precursor to some azo dyes . Production has declined after it was shown to be highly car... | https://en.wikipedia.org/wiki/4-Chloro-o-toluidine |
4-Dimethylaminophenylpentazole is an unstable, explosive compound that contains the rare pentazole ring, which is composed of five nitrogen atoms. The electron donating effect of the 4-dimethylamino substituent on the phenyl ring makes this compound one of the more stable of the phenylpentazoles. At room temperature, i... | https://en.wikipedia.org/wiki/4-Dimethylaminophenylpentazole |
mice: oral, 350 mg/kg/day [ 3 ] rat: oral, 250 mg/mL [ 3 ] fly: oral, 0.15 mg/mL [ 3 ]
4-Dimethylaminopyridine ( DMAP ) is a derivative of pyridine with the chemical formula (CH 3 ) 2 NC 5 H 4 N. This white solid is of interest because it is more basic than pyridine , owing to the resonance stabilisation from the NMe... | https://en.wikipedia.org/wiki/4-Dimethylaminopyridine |
4-Hydroxy-2,4,5-triaminopyrimidine is an organic compound with the formula C 4 N 2 (OH)(NH 2 ) 3 . The compound is classified as a pyrimidine substituted with three amino groups and a hydroxyl group.
The title compound is one of several possible tautomers . As established by X-ray crystallography , the doubly protonat... | https://en.wikipedia.org/wiki/4-Hydroxy-2,4,5-triaminopyrimidine |
4-Hydroxy-TEMPO or TEMPOL , formally 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl, is a heterocyclic compound . Like the related TEMPO , it is used as a catalyst and chemical oxidant by virtue of being a stable aminoxyl radical . Its major appeal over TEMPO is that it is less expensive, being produced from triacetone ... | https://en.wikipedia.org/wiki/4-Hydroxy-TEMPO |
4-Hydroxyestradiol ( 4-OHE2 ), also known as estra-1,3,5(10)-triene-3,4,17β-triol , is an endogenous , naturally occurring catechol estrogen and a minor metabolite of estradiol . [ 1 ] It is estrogenic , similarly to many other hydroxylated estrogen metabolites such as 2-hydroxyestradiol , 16α-hydroxyestrone , estriol ... | https://en.wikipedia.org/wiki/4-Hydroxyestradiol |
4-Hydroxyphenylpyruvic acid (4-HPPA) is an intermediate in the metabolism of the amino acid phenylalanine . The aromatic side chain of phenylalanine is hydroxylated by the enzyme phenylalanine hydroxylase to form tyrosine . The conversion from tyrosine to 4-HPPA is in turn catalyzed by tyrosine aminotransferase . [ 2... | https://en.wikipedia.org/wiki/4-Hydroxyphenylpyruvic_acid |
4-Iodophenol ( p -iodophenol ) is an aromatic organic compound. A colorless solid, it is one of three monoiodophenols. 4-Iodophenol undergoes a variety of coupling reactions in which the iodine substituent is replaced by a new carbon group para to the hydroxy group of the phenol . [ 3 ] It is also used to enhance chemi... | https://en.wikipedia.org/wiki/4-Iodophenol |
4-Maleylacetoacetate ( 4-maleylacetoacetatic acid ) is an intermediate in the metabolism of tyrosine . It is converted to fumarylacetoacetate by the enzyme 4-maleylacetoacetate cis-trans-isomerase . Gluthathione coenzymatically helps in conversion to fumarylacetoacetic acid.
This article about an alkene is a stub . Yo... | https://en.wikipedia.org/wiki/4-Maleylacetoacetic_acid |
4-Methylimidazole ( 4-MeI or 4-MEI ) is a heterocyclic organic chemical compound with molecular formula H 3 C – C 3 H 3 N 2 or C 4 H 6 N 2 . It is formally derived from imidazole through replacement of the hydrogen in position 4 by a methyl group . It is a slightly yellowish solid.
4-MeI may be formed in the browning ... | https://en.wikipedia.org/wiki/4-Methylimidazole |
4-Nitrophenol (also called p -nitrophenol or 4-hydroxynitrobenzene ) is a phenolic compound that has a nitro group at the opposite position of the hydroxyl group on the benzene ring.
4-nitro phenol is a slightly yellow, crystalline material, moderately toxic.
It shows two polymorphs in the crystalline state. The alp... | https://en.wikipedia.org/wiki/4-Nitrophenol |
4-Nitroquinoline 1-oxide (also known as 4-NQO, 4NQO, 4Nqo, NQO and NQNO) is a quinoline derivative and a tumorigenic compound used in the assessment of the efficacy of diets , drugs , and procedures in the prevention and treatment of cancer in animal models . It induces DNA lesions usually corrected by nucleotide excis... | https://en.wikipedia.org/wiki/4-Nitroquinoline_1-oxide |
4-PPBP is a neuroprotective cyclic amine which binds to sigma receptors . [ 1 ]
4-PPBP decreases neuronal nitric oxide synthase (nNOS) activity and ischemia -evoked nitric oxide (NO) production. 4-PPBP provides neuroprotection ; this involves the prevention of ischemia-induced intracellular Ca 2+ dysregulation. [ 2 ] ... | https://en.wikipedia.org/wiki/4-PPBP |
4-Pyrrolidinylpyridine is an organic compound with the formula (CH 2 ) 4 NC 5 H 4 N. The molecule consists of a pyrrodinyl group ((CH 2 ) 4 N-) attached via N to the 4-position of pyridine . It is a white solid. The compound has attracted interest because it (pK a = 9.58) is more basic than dimethylaminopyridine (pK... | https://en.wikipedia.org/wiki/4-Pyrrolidinylpyridine |
4-Toluenesulfonyl chloride ( p -toluenesulfonyl chloride , toluene- p -sulfonyl chloride ) is an organic compound with the formula CH 3 C 6 H 4 SO 2 Cl. This white, malodorous solid is a reagent widely used in organic synthesis . [ 2 ] Abbreviated TsCl or TosCl , it is a derivative of toluene and contains a sulfonyl c... | https://en.wikipedia.org/wiki/4-Toluenesulfonyl_chloride |
A 4-poster or four poster is an automotive test system specifically designed for the testing of vehicles . [ 1 ] These test systems consist of 4 hydraulic actuators on top of which the wheels of the vehicle are placed. Movements of the actuators simulate the road surface and forces exerted by the road on the wheels. Th... | https://en.wikipedia.org/wiki/4-poster |
The 43S preinitiation complex ( 43S PIC ) is a ribonucleoprotein complex that exists during an early step of eukaryotic translation initiation. The 43S PIC contains the small ribosomal subunit (40S) bound by the initiation factors eIF1 , eIF1A , eIF3 , and the eIF2 -Met- tRNA i Met -GTP ternary complex (eIF2-TC). [ 1 ]... | https://en.wikipedia.org/wiki/43S_preinitiation_complex |
451 Group is a New York City -based technology industry research firm. Through its Uptime Institute operating unit, the company provides research for data center operators. [ 1 ] In December 2019, 451 Group sold an operating division, 451 Research, to information and analytics company S&P Global .
The 451 Group was fo... | https://en.wikipedia.org/wiki/451_Group |
454 Life Sciences was a biotechnology company based in Branford, Connecticut that specialized in high-throughput DNA sequencing . It was acquired by Roche in 2007 and shut down by Roche in 2013 when its technology became noncompetitive, although production continued until mid-2016. [ 1 ]
454 Life Sciences was founded ... | https://en.wikipedia.org/wiki/454_Life_Sciences |
46,XX/46,XY is either a chimeric or mosaic genetic condition characterized by the presence of some cells that express a 46,XX karyotype and some cells that express a 46,XY karyotype in a single human being. [ 1 ] [ 2 ] [ 3 ] Individuals with these conditions are classified as intersex .
The cause of the condition lies... | https://en.wikipedia.org/wiki/46,XX/46,XY |
In digital audio , 48,000 Hz (also represented as 48 kHz or DVD Quality ) is a common sampling rate . It has become the standard for professional audio and video.
48 kHz is evenly divisible by 24, a common frame rate for media, such as film, unlike 44.1 kHz . [ i ]
In the late 1970s, digital audio didn't yet have a s... | https://en.wikipedia.org/wiki/48,000_Hz |
The 4C Entity is a digital rights management (DRM) consortium formed by IBM , Intel , Panasonic and Toshiba that has established and licensed interoperable cryptographic protection mechanisms for removable media technologies. [ 1 ] 4C Entity was founded in 1999 when Warner Music approached the companies to develop stro... | https://en.wikipedia.org/wiki/4C_Entity |
The 4D/RCS Reference Model Architecture is a reference model for military unmanned vehicles on how their software components should be identified and organized.
The 4D/RCS has been developed by the Intelligent Systems Division (ISD) of the National Institute of Standards and Technology (NIST) since the 1980s. [ 1 ]
T... | https://en.wikipedia.org/wiki/4D-RCS_Reference_Model_Architecture |
In computer science , a 4D vector is a 4-component vector data type . Uses include homogeneous coordinates for 3-dimensional space in computer graphics , and red green blue alpha ( RGBA ) values for bitmap images with a color and alpha channel (as such they are widely used in computer graphics). They may also represent... | https://en.wikipedia.org/wiki/4D_vector |
The 4Pi-STED-microscope is the result of combining the two unrelated concepts of Stimulated emission depletion (STED) microscopy and 4Pi-microscopy . Here, a fluorescent sample is placed in the common focus of two opposing lenses , but excitation and detection are performed through a single lens (4Pi mode A). The green... | https://en.wikipedia.org/wiki/4Pi_STED_microscopy |
A 4Pi microscope is a laser scanning fluorescence microscope with an improved axial resolution . With it the typical range of the axial resolution of 500–700 nm can be improved to 100–150 nm, which corresponds to an almost spherical focal spot with 5–7 times less volume than that of standard confocal microscopy . [ 1 ]... | https://en.wikipedia.org/wiki/4Pi_microscope |
5'-Methoxyhydnocarpin ( 5′-MHC ) is a chemical compound that has been isolated from Berberis [ 1 ] and Hydnocarpus wightianus . [ 2 ]
5′-MHC potentiates the antimicrobial effect of berberine in vitro . [ 1 ]
This biochemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/5'-Methoxyhydnocarpin |
5,6-Dichloro-1-β- D -ribofuranosylbenzimidazole (DRB) is a chemical compound that inhibits transcription elongation by RNA Polymerase II . Sensitivity to DRB is dependent on DRB sensitivity inducing factor (DSIF), negative elongation factor (NELF), and positive transcription elongation factor b (P-TEFb). DRB is a nuc... | https://en.wikipedia.org/wiki/5,6-Dichloro-1-β-D-ribofuranosylbenzimidazole |
5,6-Dihydroxycytosine ( Isouramil ) can be formed from treatment of DNA with osmium tetroxide . [ 1 ]
This article about an organic compound is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/5,6-Dihydroxycytosine |
In computing and electronic systems, binary-coded decimal ( BCD ) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits , usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).
In byte -oriented sys... | https://en.wikipedia.org/wiki/5-2-2-1_code |
In computing and electronic systems, binary-coded decimal ( BCD ) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits , usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).
In byte -oriented sys... | https://en.wikipedia.org/wiki/5-3-1-1_code |
In computing and electronic systems, binary-coded decimal ( BCD ) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits , usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).
In byte -oriented sys... | https://en.wikipedia.org/wiki/5-4-2-1_code |
5-Bromouracil ( 5-BrU , 5BrUra , or br5Ura [ 1 ] ) is a brominated derivative of uracil that acts as an antimetabolite or base analog , substituting for thymine in DNA , and can induce DNA mutation in the same way as 2-aminopurine . [ 2 ] It is used mainly as an experimental mutagen , but its deoxyriboside derivative (... | https://en.wikipedia.org/wiki/5-Bromouracil |
5-Dehydro- m -xylylene (DMX) is an aromatic organic tri radical and the first known organic molecule to violate Hund's Rule . [ 1 ]
Its electronic ground state is an open-shell doublet rather than a quartet; that is, the unpaired electrons in the three singly occupied molecular orbitals form a low- spin state in which... | https://en.wikipedia.org/wiki/5-Dehydro-m-xylylene |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.