Effect of Freeze-Thaw Pretreatment on Extraction Yield and Antioxidant Bioactivity of Corn Carotenoids (Lutein and Zeaxanthin)

Figure 5

Transmission electron microscope (TEM) images of CGM. (A1, A2) no pretreatment; (B1, B2) freeze-thaw (−20°C, 100% moisture content, freeze-thaw twice) pretreatment.