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yield (yeld)

The amount or quantity produced or returned, often measured as a percent of the starting material; e.g., a y. in an enzyme preparation is equal to the units of enzyme activity recovered at the end of the preparation divided by the total units observed in the starting material.
quantum y. (phi) the number of molecules transformed (e.g., via a reaction) per quantum of light absorbed; the inverse of the quantum requirement.quantum efficiency;


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