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紫甘薯花色苷的组分及抗氧化活性研究(英文) StudyontheComponentsandAntioxidantActivityofAnthocyaninsinPurpleSweetPotato Introduction Purplesweetpotatoisakindofedibleplantwithhighnutritionalvalue.IthasbeenwidelyusedasafoodandmedicineinChinasinceancienttimes.Thecolorofpurplesweetpotatoisduetothepresenceofanthocyaninpigments.Studieshaveshownthatanthocyaninshaveavarietyofbiologicalactivities,suchasantioxidant,anti-inflammatory,andanti-cancerproperties.Therefore,exploringthecomponentsandantioxidantactivityofanthocyaninsinpurplesweetpotatoisofgreatsignificanceforitsapplicationinfoodandmedicine. MaterialsandMethods Inthisstudy,purplesweetpotatowasusedastherawmaterial.Theanthocyaninswereextractedbysolventextraction,andthecomponentsofanthocyaninswereanalyzedbyhigh-performanceliquidchromatography(HPLC).Theantioxidantactivityofanthocyaninswasdeterminedbythe2,2-diphenyl-1-picrylhydrazyl(DPPH)radicalscavengingassayandtheferricreducingantioxidantpower(FRAP)assay. Results TheHPLCanalysisofanthocyaninsinpurplesweetpotatoshowedthatthemaincomponentswerecyanidin-3-glucoside,peonidin-3-glucoside,andpelargonidin-3-glucoside.Thetotalcontentofanthocyaninswas45.96mg/gdryweight.TheDPPHandFRAPassaysshowedthatanthocyaninshadstrongantioxidantactivity,andtheantioxidantactivitywaspositivelycorrelatedwiththeconcentrationofanthocyanins.Additionally,theantioxidantactivityofanthocyaninswasstableunderhightemperatureandpHconditions. Discussion Theresultsofthisstudyshowedthatpurplesweetpotatoisarichsourceofanthocyanins,andthemaincomponentsofanthocyaninsarecyanidin-3-glucoside,peonidin-3-glucoside,andpelargonidin-3-glucoside.TheseanthocyaninshavestrongantioxidantactivityandarestableunderhightemperatureandpHconditions,whichisbeneficialfortheirapplicationinfoodandmedicine.Moreover,theantioxidantactivityofanthocyaninswaspositivelycorrelatedwiththeconcentrationofanthocyanins,indicatingthatanthocyaninsmaybeusedasanaturalantioxidanttoreplacesyntheticantioxidants. Conclusion Inconclusion,thestudyonthecomponentsandantioxidantactivit