Fig 3.
Principal component analysis predictive biplots of botanical origin over antioxidant (a) and physicochemical (b) properties. The degree of proximity between variables and the narrower angle between diagonal lines indicated a strong association. TPC = Total phenolic content; TFC = Total flavonoid content; DPPH = 1, 1-diphenyl-2-picrylhydrazyl scavenging activity; H2O2; hydrogen peroxide scavenging activity; RI = refractive index; OD = optical density; HMF = hydroxymethylfurfural; EC = Electrical conductivity.