Science in School Issue 13 : Autumn 2009
Table 1: Sample results
Main substancesprobablyresponsible for theantioxidant activityCommon nameScientific name
27Water
Chlorogenic acid, and -carotene
33Carrot
Daucus carota
Indole-3-carbinol,sulphoraphane, glucosi-nolates, vitamin C,isothyocianate
34Cauliflower
Brassica oleraceaBotrytis
Anthocyanins35Vinegar
Hydroxytyrosol,tyrosol,oleuropein,caffeic acid
36Extra-virgin olive oil
Olea europea
trans-lycopene,phytofluene, phy-toene, -carotene,caffeic and chloro-genic acid
38Pachino tomatoes
Solanum lycoper-sicum (Pachino IGP)
Anthocyanins, quercetinand isorhamnetin glyco-sides and dihydrochal-cones, catechins, phlo-ridzin, chlorogenic acid,proanthocyanidins
39Apple
Malus domestica
Water-soluble organosul-phur compounds (S-allyl-cysteine and S-allylmer-captocysteine); lipid-solu-ble organosulphur compo-nents (diallyl polysulphides,ajoene), flavonoids (quercetin), notablyallixin and selenium
39Garlic
Allium sativum
Quercetin-4'-O-beta-glucoside;quercetin-3,4'-O-beta-diglucosides
40Onion
Allium cepa
Cyanidin-3-O-rhamnoglucosideas the main antho-cyanin;polyphenols
42Fig jam
Ficus carica
-cryptoxanthin,zeaxanthin, cate-chine, -carotene andascorbic acid
45Japanese
persimmonDiospyros kaki
Vitamins C and E,isoflavones, catechinsand epicatechins,serotonin
45Kiwi fruit
Actinidia chinensis
Anthocyanins , fla-vanone glycosides,flavone aglycones,flavone glycosides
49Orange
Citrus sinensis
Flavanone glyco-sides, flavone gly-cosides;Cglycosylflavones
56Lemon
Citrus limon
Vitamin C,lycopene, narige-nine, flavanoneglycosides, flavoneaglycones, flavoneglycosides
63Pink grapefruit
Citrus paradisi
Chrysin,pinobanksin,kaempferol,quercetin, vitaminC, pinocembrin
79Honey
Quercetin, iso-quercetin, rutin inall samples;chlorogenic acidin some samples
140Strawberry tree
Arbutus unedo
Ascorbic acid,anthocyanins, cat-echins, ellagic tan-nins, gallic andellagic acid
574Pomegranate
Punica granatum
Gallic acid, epicat-echin, catechin
147Chocolate
Resveratrol,quercetin, cate-chin, epicatechin
538Red wine
Cyanidins andellagic acid
1006Blackberry jamRubus ulmifolius
Methylpyridinium,melanoidins,chlorogenic acids
6970Espresso coffee
Time interval(antioxidantactivity) [s]
Flavanone glycosides,flavone aglyconesflavone glycosides,vitamin C
71Citron
Citrus medica
Teaching activities
Structure image courtesy of Gianluca Farusi;tomatoes courtesy of www.clipart.com
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