The free radical scavenging capability of Aptarray was tested based on the reduction of •ABTS+ radicals using the ABTS radical cation decolorization assay according to previous report34. The UV–Vis spectra of the pure solution of •ABTS+ radicals and •ABTS+ radical solution with Aptarray were determined. The inhibition rate of •ABTS+ radicals was calculated based on the ratio of neutralized •ABTS+ radicals to overall radicals using the absorbance at 734 nm. All measurements were carried out in five independent experiments.

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