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A process in which organisms with the aid of chlorophyll (green plant enzyme), convert carbon dioxide and inorganic substances into oxygen and additional plant material, using sunlight for energy. All green plants grow by this process.

Related Terms

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

HYDROFINISHING

A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.

ACID ATTACK

Caused by an incomplete flushing after an acid cleaning process of boilers or similar equipment.

AIR

A substance containing by volume approximately 78 - 79% nitrogen; 20.95% oxygen, 0.94% argon, traces of carbon dioxide, helium, etc.

ANAEROBIC

A condition in which 'free' or dissolved oxygen is not present in the water.

ABSORPTION

The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.

CRACKING

The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.

ADIABATIC PROCESS

A thermo-dynamic process in which no heat is extracted from or added to the system of the process.

HALVING

The process of adjusting magnetic compass correctors so as to remove half of the deviation on the opposite cardinal or adjacent intercardinal headings to those on which adjustment was originally made when all deviation was removed. This is done to equalize the error on opposite headings.

HUMMOCKING

The pressure process by which sea ice is forced into hummocks. When the floes rotate in the process, it is called SCREWING.
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