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. 2023 Apr 19;13:6371. doi: 10.1038/s41598-023-33652-8

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Antioxidant activity of CDs (a) DPPH free radical scavenging property of CDs (b) optical images of DPPH solution showing a gradual colour change (wine red to yellow) with the concentration increase of CDs (c) TAC activity by Phosphomolybdate assay (d) optical images of the TAC activity showing a gradual colour change (light green to deep greenish-blue) with the concentration raise of CDs.