Strawberries antioxidant activity

Wang, S.Y. and Lin, H.S., Antioxidant activity in fruits and leaves of blackberry, raspberry, and strawberry varies with cultivar and developmental stage, J. Agric. Food Chem., 48, 140, 2000. 

Other assays have been used to evaluate the antioxidant activity against H202 of several plant-based products, namely, fruit juices from different cultivars of berries (Wang and Jiao 2000), fractions rich in phenolics isolated from the aqueous by-products obtained during the milling of oil palm fruits (Balasundram and others 2005), cherry laurel fruit and its concentrated juice (Liyana-Pathirana and others 2006), and strawberries and blackberries treated with methyl jasmonate, allyl isothiocyanate, essential oil of Melaleuca alternifolia, and ethanol (Chanjirakul and others 2007). 

This assay has been used to determine the antioxidant activity of common vegetables, fruits including apples and strawberries (Eberhardt and others 2000 Chu and others 2002 Sun and others 2002 MacLean and others 2003 Meyers and others 2003), and fruit juices (Lichtenthaler and Marx 2005). No studies have yet reported the application of TOSC assay for the assessment of in vivo antioxidant status. 

Treatment of strawberry with methyl jasmonate resulted in a significant increase in total phenol content. However, even though antioxidant activity was the highest in those berries treated with methyl jasmonate, the combination methyl jasmonate-ethanol was the most effective in extending the shelf life. It appears that methyl jasmonate and ethanol treatments had an additive effect in maintaining quality of strawberries but not in retaining high antioxidant activity. 

Patras A, Brunton NP, DaPieve S and Butler F. 2009. Impact of high pressure processing on total antioxidant activity, phenolic, ascorbic acid, anthocyanin content and colour of strawberry and blackberry puree. Innov Food Sci Emerg Technol doi 10.1016/j.ifset.2008.12.004. 

The antioxidant activity of anthocyanins in the fruits and leaves from different cultivars of the thornless blackberry (Rubus sp.), red raspberry (Rubus idaeus L.), black raspberry (Rubus occidentalis L.) and strawberry (Fragaria x ananassa D.) was reported [54]. Studies on the ability of endothelial cells (EC) to incorporate anthocyanins and on the potential benefits against various oxidative stressors showed that the enrichment of EC with elderberry anthocyanins gave significant protective effects in the endothelial cells against the oxidative stressors, hydrogen peroxide, 2,2/-azobis(2-amidinopropane) dihydrochloride, and iron(II) sulfate/ascorbic acid [55]. 

Wang and Lin (2000) measured antioxidant activity (ORAC) and total phenolic and anthocyanin contents of thornless blackberry, strawberry and red and black raspberry fruits and found linear relationships between both ORAC and total phenolics and between ORAC and anthocyanins of ripe fruits. Spray-dried elderberry juice with high amounts of anthocyanin glucosides caused prolongation of the lag-phase for Cu-induced oxidation of human LDL, while the maximum oxidation rate remained unchanged (Abuja et al., 1998). For peroxyl-radical-driven LDL oxidation, however, both prolongation of lag time and reduction of maximum oxidation rate occurred. 

Skupieh K, Oszmiahski J. Influence of titanium treatment on antioxidants content and antioxidant activity of strawberries. Acta Sci Pol Technol Aliment. 2007 6(4) 83-93. 

Aaby, K., et al., 2005. Phenolic composition and antioxidant activities in flesh and achenes of strawberries (Fragaria ananasssa). J. Agric. Food Chem. 53 4032-4040. 

Wojdyo, A., Figiel, A., Oszmianski, J., 2009. Effect of drying methods with the application of vacuum microwaves on the bioactive compounds, color, and antioxidant activity of strawberry fruits. J. Agric. Food Chem. 57 1337-1343. 

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