Business / Agriculture / Action Levels: As opposed to tolerances (which are established for pesticide residues occurring as a direct result of proper usage), action levels are set for inadvertent residues resulting from previous legal use or accidental contamination. At the action level set by the Environmental Protection Agency, Food and Drug Administration and USDA are required to take enforcement action against the contaminated food or agricultural commodity. The term is also used in other regulatory programs.
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Action Noun Synonyms: activity, performance, movement, motion, energy, liveliness, vim, vigor, spirit, vitality, enterprise, initiative
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Science / Biology / Polymerase Chain Reaction (PCR): A method of amplifying or copying DNA fragments that is faster than cloning. The fragments are combined with DNA polymerase, nucleotides, and other components to form a mixture in which the DNA is cyc MORE
Technology / Home Audio / Rarefaction: In sound waves, the opposite of compression. An area of decreased air pressure caused by a sound wave. In a graphical depiction of a cyclical waveform rarefaction occurs when the wave is in the bottom MORE