Business / Agriculture / Ph: An expression of the intensity of the basic or acidic condition of a liquid or of soil: the logarithmic scale ranges from 0 to 14, where 0 is the most acid, 7 is neutral, and above 7 is alkaline. Natural waters usually have a ph between 6.5 and 8.5. Plants have differing tolerances for acidity and alkalinity.
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Business / Accounting / Physical Safeguards: Physical precautions used to protect assets and records, such as locks on doors, fireproof vaults, password verification, security gauds. MORE
Entertainment / Photography / Physiogram: Photographic patter produced by moving a regulated point of light over a sensitive emulsion. MORE