Fig. 4From: Optimization protocol for the extraction of 6-gingerol and 6-shogaol from Zingiber officinale var. rubrum Theilade and improving antioxidant and anticancer activity using response surface methodologyLinear regression line between DPPH activity, 6-gingerol and 6-shogaol content in Z.officinale var. rubrum Theilade rhizome extractsBack to article page