Mathematical Problems in Engineering / 2018 / Article / Fig 7

Research Article

Optimization of Microwave Vacuum Drying and Pretreatment Methods for Polygonum cuspidatum

Figure 7

HPLC chromatograms of compound retained in sample (1) (peak (1), polydatin; peak (2), resveratrol; peak (3), emodin; and peak (4), physcion).