Antimicrobial and antioxidant activities of different propolis samples from north‐western <scp>A</scp>lgeria

<jats:title>Summary</jats:title><jats:p>The aim of this study was the investigation of antimicrobial and antioxidant activities of different ethanolic extracts of propolis (<jats:styled-content style="fixed-case">EEP</jats:styled-content>) collected from north‐western <jats:styled-content style="fixed-case">A</jats:styled-content>lgeria. Total polyphenols and flavonoids contents of extracts were measured. The <jats:styled-content style="fixed-case">UV</jats:styled-content> absorption spectrum showed and confirmed their polyphenols constituents. All <jats:styled-content style="fixed-case">EEP</jats:styled-content>s exerted antibacterial activity against Gram‐positive bacteria, but no effect on Gram‐negative bacteria. The minimum inhibitory concentration (<jats:styled-content style="fixed-case">MIC</jats:styled-content>) of <jats:styled-content style="fixed-case">EEP</jats:styled-content>s ranged from 0.01% to 2.6% v/v. The antioxidant activity was measured using ferric‐reducing power (<jats:styled-content style="fixed-case">FRAP</jats:styled-content>), 1,1‐diphenyl‐2‐picrylhydrazyl (<jats:styled-content style="fixed-case">DPPH</jats:styled-content>) free radical‐scavenging and <jats:styled-content style="fixed-case">ESR</jats:styled-content> methods. Propolis <jats:styled-content style="fixed-case">TIA</jats:styled-content>‐2 and <jats:styled-content style="fixed-case">MOH</jats:styled-content>‐<jats:styled-content style="fixed-case">MAS</jats:styled-content> samples showed the highest antioxidative capacity, after 35 min, while <jats:styled-content style="fixed-case">TIA</jats:styled-content>‐1, <jats:styled-content style="fixed-case">NED</jats:styled-content>‐<jats:styled-content style="fixed-case">TL</jats:styled-content> and <jats:styled-content style="fixed-case">SFS</jats:styled-content>‐<jats:styled-content style="fixed-case">SBA</jats:styled-content> samples showed the highest antioxidative potential of measured <jats:styled-content style="fixed-case">EEP</jats:styled-content>s, after 3 min. <jats:styled-content style="fixed-case">TIA</jats:styled-content>‐2 sample showed the highest antibacterial, antioxidant activity and highest <jats:styled-content style="fixed-case">DPPH</jats:styled-content> free radical‐scavenging activity as well as the highest polyphenols and flavonoids content, compared with other propolis samples.</jats:p>