propellant

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Related to propellent: Aerosol propellant

propellant

(prŏ-pĕl′ănt) [L. propellere, to drive forward]
Any agent that forces another to move in a desired direction. Inhaled medications rely on propellants to improve drug delivery to patients. Hydrofluoroalkane propellants are used in metered dose inhalers, i.e., in canisters that deliver drugs such as beta-agonists or anticholinergic agents to patients with asthma or chronic obstructive lung disease.
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References in periodicals archive ?
A switch to Pyrodex as a propellent gave similar results.
Due to variations in bullet profiles, thicknesses of brass in the neck of the cartridge, and the way propellents may pack in the case, not all rounds come out with the same length reading and may have a variance of 0.002" long or short.
Despite early experiments with sodium bicarbonate--ordinary baking soda--the era of foamed plastics had to await the results of German work on hydrazine-based rocket propellents during World War II.
Propellents used in these older aerosol cans have since been replaced with environmentally friendly ones.
There is already a strong precedent for this kind of chemical "stand down" in the impending ban of chlorofluorocarbons (CFCs), the now-notorious class of chemicals once almost universally used as refrigerants and spray-can propellents. CFCs were found to be weakening the stratospheric ozone layer, which shields the Earth's surface from harmful ultraviolet radiation.