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Activator II Adjustment Instrument
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Activator may refer to: * Activator (genetics), a DNA-binding protein that regulates one or more genes by increasing the rate of transcription * Activator (phosphor), a type of dopant used in phosphors and scintillators * Enzyme activator, a type of effector that increases the rate of enzyme mediated reactions * Sega Activator, a motion-sensing controller for the Sega Mega Drive/Genesis * Activator technique, a method of spinal adjustment * Activator appliance, an orthodontic functional appliance See also * Activate (other) * Activation Activation, in chemistry and biology, is the process whereby something is prepared or excited for a subsequent reaction. Chemistry In chemistry, "activation" refers to the reversible transition of a molecule into a nearly identical chemical or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activator (genetics)
A transcriptional activator is a protein (transcription factor) that increases transcription of a gene or set of genes. Activators are considered to have ''positive'' control over gene expression, as they function to promote gene transcription and, in some cases, are required for the transcription of genes to occur. Most activators are DNA-binding proteins that bind to enhancers or promoter-proximal elements. The DNA site bound by the activator is referred to as an "activator-binding site". The part of the activator that makes protein–protein interactions with the general transcription machinery is referred to as an "activating region" or "activation domain". Most activators function by binding sequence-specifically to a regulatory DNA site located near a promoter and making protein–protein interactions with the general transcription machinery (RNA polymerase and general transcription factors), thereby facilitating the binding of the general transcription machinery to the prom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activator (phosphor)
In phosphors and scintillators, the activator is the element added as dopant to the crystal of the material to create desired type of nonhomogeneities. In luminescence, only a small fraction of atoms, called emission centers or luminescence centers, emit light. In inorganic phosphors, these inhomogeneities in the crystal structure are created usually by addition of a trace amount of dopants, impurities called activators. (In rare cases dislocations or other crystal defects can play the role of the impurity.) The wavelength emitted by the emission center is dependent on the atom itself, its electronic configuration, and on the surrounding crystal structure. The activators prolong the emission time (afterglow). In turn, other materials (such as nickel) can be used to quench the afterglow and shorten the decay part of the phosphor emission characteristics. The electronic configuration of the activator depends on its oxidation state and is crucial for the light emission. Oxidation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enzyme Activator
Enzyme activators are molecules that bind to enzymes and increase their activity. They are the opposite of enzyme inhibitors. These molecules are often involved in the allosteric regulation of enzymes in the control of metabolism. An example of an enzyme activator working in this way is fructose 2,6-bisphosphate, which activates phosphofructokinase 1 and increases the rate of glycolysis in response to the hormone glucagon. In some cases, when a substrate binds to one catalytic subunit of an enzyme, this can trigger an increase in the substrate affinity as well as catalytic activity in the enzyme's other subunits, and thus the substrate acts as an activator. Examples Hexokinase-I Hexokinase-I (HK-I) is an enzyme activator because it draws glucose into the glycolysis pathway. Its function is to phosphorylate glucose releasing glucose-6-phosphate (G6P) as the product. HK-I not only signals the activation of glucose into glycolysis but also maintains a low glucose concentration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sega Activator
The Sega Genesis, known as the outside North America, is a 16-bit fourth generation home video game console developed and sold by Sega. It was Sega's third console and the successor to the Master System. Sega released it in 1988 in Japan as the Mega Drive, and in 1989 in North America as the Genesis. In 1990, it was distributed as the Mega Drive by Virgin Mastertronic in Europe, Ozisoft in Australasia, and Tec Toy in Brazil. In South Korea, it was distributed by Samsung as the Super Gam*Boy and later the Super Aladdin Boy. Designed by an R&D team supervised by Hideki Sato and Masami Ishikawa, the Genesis was adapted from Sega's System 16 arcade board, centered on a Motorola 68000 processor as the CPU, a Zilog Z80 as a sound controller, and a video system supporting hardware sprites, tiles, and scrolling. It plays a library of more than 900 games on ROM-based cartridges. Several add-ons were released, including a Power Base Converter to play Master System games. It was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activator Technique
The Activator Method Chiropractic Technique is a chiropractic treatment method and device created by Arlan Fuhr as an alternative to manual spinal manipulation, manipulation of the spine or extremity joint manipulation, joints. The device is categorized as a mechanical force manual assisted (MFMA) instrument which is generally regarded as a softer chiropractic treatment technique. Activator Adjusting Instrument The traditional Activator Adjusting Instrument (AAI), or more simply, Activator, is a small handheld spring-loaded instrument which delivers a controlled and reproducible impulse to the spine. With the release of the Activator V this process has changed from a spring-loaded grip to an electronic tool which delivers the mechanical force. It was found to give off no more than 0.3 J of kinetic energy in a 3-millisecond pulse. The aim is to produce enough force to move the vertebrae, but not enough to cause injury. The design of the tool was based on a dental impactor. Activ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activator Appliance
Activator Appliance is an Orthodontics appliance that was developed by Viggo Andresen in 1908. This was one of the first functional appliances that was developed to correct functional jaw in the early 1900s. Activator appliance became the universal appliance that was used widely throughout Europe in the earlier part of the 20th century. History Viggo Andersen first used this appliance on his daughter's mandibular teeth in the summer of 1908. He took the mechanical braces off from his daughter, and he had her wear the "Biofunctional Retainer" throughout the summer in the mandibular arch. The maxillary arch received Hawley retainer. After a while, Viggo realized that her daughter's occlusion remained the same. He then started using his retainer in his own private practice on his patients, and he saw similar results. Viggo, who was born in Denmark, moved to Norway in the 1920s. There he met Karl Haupl with whom Viggo devised the name "Activator" to describe his appliance. Haupl and Ande ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Activate (other)
Activate may refer to: Arts and entertainment * ''Activate'' (album), by Back Door * ''Activated'' (album), by Tee Grizzley * "Activate", a 2006 song by Stellar Kart from ''We Can't Stand Sitting Down'' * "Activated", a 2016 song by Cher Lloyd * "Activated", a 1989 song by Gerald Alston Organisations * Activate (organisation), a British political organisation * Activate Learning, an English education group * Honduras Activate, a health organisation See also * Activation Activation, in chemistry and biology, is the process whereby something is prepared or excited for a subsequent reaction. Chemistry In chemistry, "activation" refers to the reversible transition of a molecule into a nearly identical chemical or ... * Activator (other) {{disamb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
