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- W2109518084 abstract "The possibility of increasing the aggregated value of the huge amount of residues generated by wineries around the world foment studies using the grape pomace – the residue from the wine production, composed by seed, skin and stems – to obtain functional ingredients. Nowadays, consumers in general prefer natural and safe products mainly for food and cosmetic fields, where the supercritical fluid extraction is of great importance due to the purity of the extracts provided. Therefore, the objective of this work is to evaluate the global extraction yield, the antimicrobial activity and the composition profile of Merlot and Syrah grape pomace extracts obtained by supercritical CO2 (SC-CO2) and CO2 added with co-solvent at pressures up to 300 bar and temperatures of 50 and 60 °C. The results were compared with the ones obtained by Soxhlet and by ultrasound-assisted leaching extraction methods. The main components from the extracts, identified by HPLC, were gallic acid, p-OH-benzoic acid, vanillic acid and epicatechin. The antibacterial and antifungal activities of the extracts were evaluated using four strains of bacteria (Staphylococcus aureus, Bacillus cereus, Escherichia coli and Pseudomonas aeruginosa) and three fungi strains (Candida albicans, Candida parapsilosis, Candida krusei). Despite lower extraction yield results, the supercritical fluid extracts presented the highest antimicrobial effectiveness compared to the other grape pomace extracts due to the presence of antimicrobial active compounds. Syrah extracts were less efficient against the microorganisms tested and Merlot extracts were more active against Gram-positive bacteria." @default.
- W2109518084 created "2016-06-24" @default.
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- W2109518084 date "2013-04-01" @default.
- W2109518084 modified "2023-10-17" @default.
- W2109518084 title "Antimicrobial activity and composition profile of grape (Vitis vinifera) pomace extracts obtained by supercritical fluids" @default.
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- W2109518084 doi "https://doi.org/10.1016/j.jbiotec.2012.09.014" @default.
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