1 results about "Flavone II" patented technology

This invention discloses a loofah extract with antioxidant activity and its preparation method, belonging to the technical field of plant extracts and natural antioxidants. The method uses loofah leaves, loofah peel, or a combination thereof as raw materials. After pretreatment, crushing, and pulping, the materials undergo acidic hypoxia enzyme-inhibiting pretreatment to reduce the activity of polyphenol oxidase and / or peroxidase. Cell wall degrading enzymes are then added for multi-stage enzymatic hydrolysis to release bound polyphenols. Subsequently, an enzyme source with β-glucosidase, β-glucuronidase, and esterase activity is used to perform directional aglycone conversion of the bound polyphenols, converting bound flavonoids and / or bound phenolic acids into free flavonoid aglycones and / or free phenolic acids. Finally, the extract is obtained through alcohol-water extraction, macroporous resin enrichment, microencapsulation, and drying. The extract obtained by this invention has a high proportion of free active ingredients, good antioxidant activity, and good storage stability.