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. 2021 Apr 1;10(4):682. doi: 10.3390/plants10040682

Figure 4.

Figure 4

Response surface analysis (3D) of Barleria lupulina Lindl. leaf extract (BLLE) on DPPH activity: (a) effect of ethanol concentrations and microwave power; (b) effect of ethanol concentrations and extraction time; (c) effect of microwave power and extraction time.