Methods of extraction of fermented onion concentrate with increased quercetin content

摘要

The present invention relates to a method for producing a fermented onion extract having an increased quercetin content, comprising: an onion pretreatment step (first step) of washing the onion to remove the outer skin, and then crushing the onion to a size of 05 to 10 mm; An ethanol extraction step (second step) of mixing ethanol at a concentration of 95% to the onion pretreated in the first step at a weight ratio of 1:5 to 10 and extracting at 50 to 90°C for 3 to 10 hours; Filtration and drying step of filtering and drying the ethanol-extracted extract in the second step (third step); A buffer solution mixing step (step 4) of mixing and suspending a 100 mM citric acid buffer solution to the dried product filtered and dried in the third step; It characterized in that it consists of a fermentation step (step 5) of fermenting by inoculating the Meju bacteria solution into the suspension mixed with the buffer solution in the fourth step. Fermented onion extract with increased quercetin content prepared by the above method increases quercetin content in the edible part of onion by fermenting onion or onion extract, and the quercetin has antioxidant, brain cell protective activity, and anti-inflammatory activity. , Anti-cancer activity, anti-diabetes, anti-obesity, anti-hypertension, etc. It is possible to manufacture onions or onion extracts with increased various health functions, and to provide a composition related to foods, health functional foods, natural new drugs, etc. can do.