Fig. 7 | Scientific Reports

Fig. 7

From: Green synthesis of silver nanoparticles using Magnolia alba leaf extracts and evaluating their antimicrobial, anticancer, antioxidant, and photocatalytic properties

Fig. 7

Antioxidant Assays with MAgNP. (A) Total Flavonoid Content of leaf extract and MAgNPs expressed as Quercetin equivalents (QE). Magnolia silver nanoparticles showed significantly higher TFC values compared to the leaf extracts only. (B) Total Phenolic Content of leaf extract and MAgNPs expressed as Gallic acid equivalents (GAE). Magnolia silver nanoparticles showed significantly higher TPC values compared to the leaf extracts. (C) Total Antioxidant Content of leaf extract and MAgNPs expressed as Ascorbic Acid Equivalents (AAE). Magnolia silver nanoparticles showed significantly higher TAC values compared to the leaf extracts. (D) FRAP analysis of leaf extract and MAgNPs. The ferric ion reducing power was observed to be higher in MAgNPs compared to the leaf extracts. The results showed that MAgNPs exhibited greater free radical scavenging activity within 4 min and after 6 min, whereas the leaf extracts scavenging activity also increased but at a slower rate. (E) Percent DPPH values for leaf extracts and MAgNPs. The MAgNPs demonstrated superior free radical scavenging activity compared to the leaf extracts. The higher reducing power and electron-donating property of MAgNPs support the presence of a higher TFC demonstrated above. The error bars are the standard error of the mean (SE). P-values were obtained using a t-test to compare the means of the groups.

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