). In contrast to our findings here, the traditionally aqueous extraction method was used to extract RPs by Wang, Wu, Shi, and Gao (2010), and the optimum extraction
conditions were extraction times 3, temperature 85 ◦ C, volumes of
water 15, and extraction time 3 h. Under these optimum extraction conditions, they obtained the maximum RPs yield [0.15% (w/w)], which was lower than obtained here.