Betekenis van:
activator

activator
Zelfstandig naamwoord
    • (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription

    Hyperoniemen

    Hyponiemen


    Voorbeeldzinnen

    1. Activator missing, damaged or inoperative.
    2. Activator missing, damaged or inoperative
    3. an activator (normally a halide salt); and
    4. water-based developer and activator solutions
    5. An activator (normally a halide salt); and
    6. Only uses as a plant activator may be authorised.
    7. Parking brake activator, lever control, parking brake ratchet
    8. Parking brake activator, lever control, parking brake ratchet, electronic parking brake
    9. Lead as activator in the fluorescent powder (1 % lead by weight or less) of discharge lamps when used as speciality lamps for diazoprinting reprography, lithography, insect traps, photochemical and curing processes containing phosphors such as SMS ((Sr,Ba)2MgSi2O7:Pb)
    10. Lead as activator in the fluorescent powder (1 % lead by weight or less) of discharge lamps when used as sun tanning lamps containing phosphors such as BSP (BaSi2O5:Pb)
    11. Lead as activator in the fluorescent powder (1 % lead by weight or less) of discharge lamps when used as sun tanning lamps containing phosphors such as BSP (BaSi2O5:Pb) as well as when used as speciality lamps for diazo-printing reprography, lithography, insect traps, photochemical and curing processes containing phosphors such as SMS ((Sr,Ba)2MgSi2O7:Pb).
    12. "Laser" Vaporization uses either pulsed or continuous wave "laser" beams to vaporize the material which forms the coating; 4. Cathodic Arc Deposition employs a consumable cathode of the material which forms the coating and has an arc discharge established on the surface by a momentary contact of a ground trigger. Controlled motion of arcing erodes the cathode surface creating a highly ionized plasma. The anode can be either a cone attached to the periphery of the cathode, through an insulator, or the chamber. Substrate biasing is used for non line-of-sight deposition. N.B. This definition does not include random cathodic arc deposition with non-biased substrates. 5. Ion Plating is a special modification of a general TE-PVD process in which a plasma or an ion source is used to ionize the species to be deposited, and a negative bias is applied to the substrate in order to facilitate the extraction of the species from the plasma. The introduction of reactive species, evaporation of solids within the process chamber, and the use of monitors to provide in-process measurement of optical characteristics and thicknesses of coatings are ordinary modifications of the process. c. Pack Cementation is a surface modification coating or overlay coating process wherein a substrate is immersed in a powder mixture (a pack), that consists of: 1. The metallic powders that are to be deposited (usually aluminium, chromium, silicon or combinations thereof); 2. An activator (normally a halide salt); and 3. An inert powder, most frequently alumina.