Extraction of Flavonoids from Corn Silk and Biological Activities In Vitro

When harvesting corn, corn silk was discarded as waste, including the compounds isolated and identified from such flavonoids, sterols, alkaloids, polysaccharides, organic acids, volatile oils, trace elements, multivitamins. It not only pollutes environment but also wastes resources. In this paper, extraction methods commonly used for extracting flavonoids were reviewed, reagent method, enzymatic microwave, supercritical CO2 extraction, ultrasonic, microwave-assisted ultrasonic. Flavonoids are natural antioxidants have application value in scavenging free radicals, inhibiting bacteria, regulating blood lipids. The vitro biological activities of extracted by different compared.