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Concentration of Bioactive Compounds from Elderberry (Sambucus nigra L.) Juice by Nanofiltration Membranes
- Tundis, Rosa, Loizzo, Monica R., Bonesi, Marco, Sicari, Vincenzo, Ursino, Claudia, Manfredi, Ilaria, Conidi, Carmela, Figoli, Alberto, Cassano, Alfredo
- Plant foods for human nutrition 2018 v.73 no.4 pp. 336-343
- Sambucus nigra, antioxidant activity, bioactive compounds, carbohydrates, elderberries, enzymes, functional foods, high performance liquid chromatography, juices, molecular weight, nanofiltration, noninsulin-dependent diabetes mellitus, phenolic compounds, polymers
- For the first time the chemical profile, physico-chemical parameters, inhibition of carbohydrate hydrolysing enzymes associated with type 2 diabetes, and radical scavenging properties of Sambucus nigra L. (elderberry) juice treated by nanofiltration (NF) were investigated. Three commercial NF membranes with different molecular weight cut-off (MWCO) (400 and 1000 Da) and polymeric material (composite fluoro-polymer and polyethersulphone) were tested. According to HPLC analyses, most part of bioactive compounds were retained by the NF membranes producing a retentate fraction of interest for the production of functional foods. The NP030 membrane, a polyethersulphone membrane with a MWCO of 400 Da, exhibited the highest rejection towards phenolic compounds when compared with the other selected membranes. Accordingly, the produced retentate fractions exhibited the highest radical scavenging activity.