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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.