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The study assessed the health-promoting properties and the content of minerals in the bark of bird cherry ( Prunus padus  L.), which was then used as an ingredient in functional teas. The infusions were made with the use of  Matricaria chamomilla  L.,  Tilia cordata  Mill., and  Calendula officinalis  L., and then combined with the bark in various proportions. The prepared infusions were tested for antioxidant activity, ability to reduce copper ions and iron ions, as well as the ability to scavenge hydroxyl radicals. In the next stage, the antimicrobial activity and the ability to inhibit the enzyme cycloxygenase-2 were assessed. Bird cherry bark contains a high potassium content of 19.457 ± 762 mg/kg d.m. In all the tests evaluating the antioxidant activity, infusions from the bark of bird cherry alone and with its 30% addition had the strongest properties. The analyzed infusions also have the ability to reduce Cu( ii ) ions; they are active to reduce Fe( iii ) ions and scavenge hydroxyl radical. The highest antimicrobial activity was found for teas with 20 and 30% bark, especially against  Listeria monocytogenes  (25.0–27.0 mm) (±3.0). The bark infusion was also found to have the highest inhibitory activity against cyclooxygenase-2 (COX-2) – 77.0%.

open chemistry

Prunus padus  L. bark as a functional promoting component in functional herbal infusions – cyclooxygenase-2 inhibitory, antioxidant, and antimicrobial effects