Activator may mean:
  • Activator (genetics)
    Activator (genetics)
    An activator is a DNA-binding protein that regulates one or more genes by increasing the rate of transcription. The activator may increase transcription by virtue of a connected domain which assists in the formation of the RNA polymerase holoenzyme, or may operate through a coactivator. A...

    , a DNA-binding protein that regulates one or more genes by increasing the rate of transcription
  • Activator (proteomics), a type of effector that increases the rate of enzyme mediated reactions
  • Activator (phosphor)
    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....

    , a type of dopant
    A dopant, also called a doping agent, is a trace impurity element that is inserted into a substance in order to alter the electrical properties or the optical properties of the substance. In the case of crystalline substances, the atoms of the dopant very commonly take the place of elements that...

     used in phosphor
    A phosphor, most generally, is a substance that exhibits the phenomenon of luminescence. Somewhat confusingly, this includes both phosphorescent materials, which show a slow decay in brightness , and fluorescent materials, where the emission decay takes place over tens of nanoseconds...

    s and scintillator
    A scintillator is a special material, which exhibits scintillation—the property of luminescence when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate, i.e., reemit the absorbed energy in the form of light...

  • Sega Activator, a motion-sensing controller for the Sega Mega Drive/Genesis
  • Activator technique
    Activator technique
    The Activator Method Chiropractic Technique is a chiropractic treatment method and device created by Arlan Fuhr as an alternative to manual manipulation of the spine or extremity joints...

    , a method of spinal adjustment
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