Fig. 4From: Antioxidants and α-glucosidase inhibitors from Neptunia oleracea fractions using 1H NMR-based metabolomics approach and UHPLC-MS/MS analysisPermutation plots of PLS model describing the R2 and Q2 Y-intercepts for DPPH free radical scavenging (a) and α-glucosidase inhibitory (b) activities of N. oleracea fractionsBack to article page