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Table 3 Correlations between TPC with antioxidant and cytoprotective (CP) activities

From: Antioxidant and cytoprotective activities of Piper betle, Areca catechu, Uncaria gambir and betel quid with and without calcium hydroxide

Assay TPC vs 1/DPPH TPC vs FRAP TPC vs FTC TPC vs CP
r value 0.972 0.981 -0.951 0.682
p value < 0.01 < 0.01 < 0.01 0.005