Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7584346 | Food Chemistry | 2018 | 8 Pages |
Abstract
Coffee silverskin (a coffee roasting by-product) contains high amounts of dietary fibre (49% insoluble and 7% soluble) and protein (19%). Potassium (â¼5 g/100 g), magnesium (2 g/100 g) and calcium (0.6 g/100 g) are the major macrominerals. The vitamin E profile of silverskin comprises α-tocopherol, β-tocopherol, É£-tocopherol, δ-tocopherol, β-tocotrienol, É£-tocotrienol, and δ-tocotrienol. The fatty acid profile is mainly saturated (C16:0 and C22:0), but the total amount of fat is low (2.4%). Caffeine (1.25 g/100 g), chlorogenic acid (246 mg/100 g), and 5-hydroxymethylfurfural (5.68 mg/100 g) are also present in silverskin. Total phenolics and flavonoids are partially responsible for the in vitro antioxidant activity. Silverskin extracts protected erythrocytes from oxidative AAPH- and H2O2-induced hemolysis, but at high concentrations a pro-oxidant effect on erythrocyte morphology was observed.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
Anabela S.G. Costa, Rita C. Alves, Ana F. Vinha, ElÃsio Costa, Catarina S.G. Costa, M. Antónia Nunes, Agostinho A. Almeida, Alice Santos-Silva, M. Beatriz P.P. Oliveira,