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. 2023 Oct 24;28(21):7242. doi: 10.3390/molecules28217242

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Results of total polyphenol contents and antioxidant activities of turmeric ethanol extracts from non-roasted, light-roasted and dark-roasted samples. (A): gallic acid standard curve, (B): total polyphenol content, (C): DPPH scavenging activity and (D): ABTS scavenging activity. Results are expressed as means ± standard deviation (SD) of three tests. Values with different superscript letters indicate significant difference (p < 0.05) compared with other values, assessed by one-way ANOVA followed with Tukey’s post hoc test.