Antibacterial activity of Turkish propolis and its qualitative and quantitative chemical composition

Components responsible for antimicrobial activity of propolis from continental and Mediterranean regions in Croatian

“…Taken together, the Spearman rank-order correlations between total phenol and flavonoid and DPPH and FRAP indicated that phenolic compounds have a more important role than flavonoids in determining scavenging capacity and antioxidant power. Similar observations have been made with Turkish propolis: propolis with the greatest phenol and flavonoid content exhibited the most pronounced antioxidant activity (Popova et al 2005;Živković et al 2010). Thus, our results support the hypothesis of a high correlation between the antioxidant activity and phenolics and flavonoids.…”

“…A high correlation between the total phenolic and flavonoid content and free radical scavenging activity was also reported for propolis samples from other countries; e.g., Argentina (Vera et al 2011), Japan (Hamasaka et al 2004), Greece and Cyprus (Popova et al 2005), and Poland (Socha et al 2015). Correlations between individual compounds and antioxidant and antimicrobial activity were also analysed ( Table 4).…”

Color, phenolic and flavonoid content, and antioxidant activity of honey from Roraima, Brazil

“…Following incubation for 30 min, the absorbance of the reaction mixture was measured at 437 nm against a methanol blank. A standard curve of quercetin was drawn within a concentration range of 3.0 x 10 -4 to 4.0 x 10 -3 mg/mL (Chang et al, 2002;Popova et al, 2005Popova et al, , 2007Tylkowski et al, 2010;Gómez-Caravaca et al, 2006).…”

“…The flavonoid results in this study were lower than the results obtained for honey from the northeast of Brazil, which ranged from 2.5 to 83.8 mg of quercetin kg -1 of honey (Liberato et al, 2011). (Chang et al, 2002;Popova et al, 2005Popova et al, , 2007Tylkowski et al, 2010). The principle of this method is that the 2,4-dinitrophenylhydrazine reagent reacts with the carbonyl of ketones and aldehydes to form 2,4-dinitrophenylhydrazone, resulting in a red color (Chang et al, 2002).…”

Efficiency of Certain Natural Extracts and Antibiotics in Managing the American Foulbrood (AFB) of Honey Bees in Egypt

“…Ten milliliters of that prepared solution were sprayed on infected cells in the combs of each examined colony. Popova et al( 2005).…”