deactivation


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deactivation

[dē‚ak·tə′vā·shən]
(chemistry)
Rendering inactive, as of a catalyst.
Loss of radioactivity.
(metallurgy)
Chemical removal of the active constituents of a corrosive liquid.
(mining engineering)
Treatment of one or more species of mineral particles to reduce floating during froth flotation.

deactivation

The reduction or removal of the corrosive qualities of water, usually by passing the water through a deactivator while hot.
References in periodicals archive ?
Most commonly however, cylinder deactivation is applied to particular cylinders and achieved by cutting fuel supply and disabling intake and exhaust valve actuation, leaving the valves closed.
Mode Deactivation Therapy does not work with adolescents alone.
The first trigger for deactivation -- death -- is self evident, but the rest are slightly more complex.
Checks: Two-thirds of the latest biometric deactivations were caused by contingency staff.
The cylinder deactivation system works by deactivating the second and third cylinders when the car is cruising, and the cylinders are reactivated when the driver presses the accelerator.
The abstract for the patent states that it is for "an apparatus for concentration and deactivation of actinide nuclear materials having a pair of spaced apart electrodes made of a composite material including at least one oxide, at least one carbon-containing material and lead, a nuclear waste water stream flowing between the electrodes, and a DC power supply operably connected with the electrodes.
In the report filed with the ministry, Ford said an improper structure in the deactivation switch of the automated cruise control, which enables drivers to drive cars at a certain speed without stepping down on the pedal, could cause a fire as brake fluid may leak and produce heat.
In the future, its application could be extended to 4-cylinder in-line engines, representative of the great majority of European applications, provided that a way can be found to relieve the problems of vibration and roughness resulting from the deactivation.
This is the eighth recall since 1999 related to the faulty cruise control deactivation switch and brings the total to 16 million vehicles recalled.
This was the final deployment for VS-22--the Navy's last S-3B Viking squadron--which marked its deactivation with a 29 January ceremony at NAS Jacksonville, and officially deactivated on 31 March.
Hence, the important challenges of development of cobalt catalysts have focused on decreasing the deactivation rate of supported catalysts [Krishnamurthy et al.
Quite a few units had already transformed, yet, my search for information on the unit deactivation process yielded little.