Phytochemical and Antioxidant Studies on a Rare Rheum cordatum Losinsk. Species from Kazakhstan

Figure 1

Matrix for grouping objects and features (data standardized by the -score method) (the codes applied: 1: ethanol; 2: 50% ethanol; 3: DCM; 4: H₂O; 5: CHCl₃: R: Rheum; ST: stem; SE: seed; LE: leaf; RO: root).