Air scrubbers, wet scrubbers, and gas scrubbers are air pollution control devices that use a high-energy liquid spray to remove aerosol and gaseous pollutants from an air stream. The gases are removed either by absorption or chemical reaction.
Reagents and laboratory chemicals include substances of sufficient purity for use in chemical analysis, chemical reactions or physical testing. Purity standards for reagents and laboratory chemicals are set by organizations such as ASTM International or the American Chemical Society.
Fuel cells produce electricity and heat electrochemically by combining oxygen from the air with a fuel, preferably hydrogen, from methanol, natural gas, or petroleum. Reformers are often used in conjunction with fuel cells.
Balls and sphere shapes are used in products that require a spherical component. Examples include bearings, ball screws, valves, flow meters, and gages. Balls and sphere shapes are made from materials such as glass, metals, plastics, and ceramics.
Primary refrigerants use a thermodynamic or adiabatic process (evaporation-condensation cycles) to remove heat and cool a region. Secondary refrigerants such as antifreeze liquids provide cooling solely through heat transfer.
This method covers determination of the specific gravity of soils by means of a pycnometer. When the soil is composed of particles larger than the 4.75-mm (No. 4) sieve, the method outlined in T 85 shall be followed. ASTM C1039 - These test methods cover...