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Bioactivity of Blackberry (Rubus fruticosus L.) Pomace: Polyphenol Content, Radical Scavenging, Antimicrobial and Antitumor Activity

In this study, the juice processing by-product, the pomace extracts from two blackberry cultivars, Čačanska bestrna and Thornfree were used to determine the contents of total phenolics, total flavonoids, and total and monomeric anthocyanins. Radical scavenging activity was determined using DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. Antitumor in vitro activity, as well as cell death, were also evaluated. Antimicrobial activity was evaluated in a panel of reference and wild strains.