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Half-life
When a property (e.g. radioactivity, enzyme activity, etc.) decreases at a rate proportional to its concentration, the time, t½, taken for the property to decrease to one-half its initial value; related to the first-order rate constant, k, by t½=ln2/k.
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- Part of Speech: noun
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- Industry/Domain: Biology
- Category: Biochemistry; Molecular biology
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