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Use "reactants" in a sentence
"If this is done by rapid mixing of the reactants, the time limit is about one thousandth of a second (millisecond)."
"Marcus's theory predicts how the rate varies with the driving force for the reaction, i.e. the difference in energy between reactants and products, and counter to intuition he found that it does not increase continuously, but goes through a maximum, into the Marcus inverted region, which has later been confirmed experimentally."
"Erythrocyte sedimentation rate, C-reactive protein and acute phase reactants"