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Measurement of cellular generated radical quenching by the phytogenic and antibiotic feed additive in either fresh or 24 h preparations. (*) denotes significance differences when compared to the control and (+) denotes a significant difference when compared to the phytogenic feed additive. Significance is defined as p<0.05. Inset: representative ESR spectra, arrow denotes Cr(V) radical verifying that cells are viable and generating radicals
