Raspberries antioxidant activity

Beekwilder, J. et al.. Antioxidants in raspberry on-hne analysis links antioxidant activity to a diversity of individnal metabolites, J. Agric. Food Chem., 53, 3313, 2005. 

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. 

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. 

Table 111. Contribution of Important Anthocyanins to Antioxidant Activity in Blackberries Chester thornless). Blueberries (Sierra), Chokeberries (Wild), Cranberries (Ben Lear), Lingonberries (Amber land). Black Raspberries...

The physiological activity of the T. is based on their radical scavenging properties, they are of major importance in cell membranes and lipoproteins as antioxidants. Long-term supplementation with a-T. can reduce the incidence of certain forms of cancer. T. are pale yellow, viscous oils. They are oxidized by atmospheric oxygen in the presence of metal ions or under the action of light. T. occur in plant oils seed oils of soya, wheat, com, rice, cotton, alfalfa, and nuts are particularly rich in T. Fruits and vegetables such as raspberries, legumes, fennel, paprika and celery also con-... 

The recent literature indicates that n-3 supplements have shown anti-inflammatory activity against arthritis, lupus, and IgA nephropathy as well as protection against bone loss in both human and animal studies (122). Currently, fish oil intake is no longer an undesirable food supplement. It is available in concentrated form with antioxidants and in various flavors (orange or raspberry). One of the mechanisms by which fish oil exerts its protective action against bone loss is by decreasing urinary calcium loss (179-181). 

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