| Literature DB >> 29934169 |
Anabela S G Costa1, Rita C Alves2, Ana F Vinha3, Elísio Costa4, Catarina S G Costa5, M Antónia Nunes6, Agostinho A Almeida7, Alice Santos-Silva8, M Beatriz P P Oliveira9.
Abstract
Coffee silverskin (a coffee roasting by-product) contains high amounts of dietary fibre (49% insoluble and 7% soluble) and protein (19%). Potassium (∼5g/100g), magnesium (2g/100g) and calcium (0.6g/100g) are the major macrominerals. The vitamin E profile of silverskin comprises α-tocopherol, β-tocopherol, ɣ-tocopherol, δ-tocopherol, β-tocotrienol, ɣ-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 (1.25g/100g), chlorogenic acid (246mg/100g), and 5-hydroxymethylfurfural (5.68mg/100g) 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.Entities:
Keywords: Antioxidant and pro-oxidant activity; By-product; Dietary fibre; Hemolysis inhibition; Macrominerals; Nutritional composition; Vitamin E
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Year: 2017 PMID： 29934169 DOI： 10.1016/j.foodchem.2017.03.106
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514