Fig. 4From: Measuring antioxidant activity in yellow corn (Zea mays L.) inbreds from three different geographic regionsBoxplots of antioxidant activities and carotenoid contents of corn samples based on geographic location, including polyphenols (A), flavonoid (B), DPPH (C), ABTS (D), and carotenoid contents (E). Significant differences among samples are indicated by *p  <  0.01, **p  <  0.005, and ***p  <  0.001Back to article page