In vitro antibacterial efficacy of methanolic plant extract and biosynthesized silver nanoparticles from Euphorbia species against two selected foodborne pathogens

Synthesis of green-engineered silver nanoparticles using Cymbopogon citratus (lemongrass) and its antibacterial activity against clinical Pseudomonas aeruginosa

“…The previous visual observation was confirmed because the absorbance increased with the concentration of AgNO 3: 0.1A for 1 mM, 0.32 A for 2.5 mM, and 0.65 A for 5 mM. The tuning fork of the optimal absorptions of the different solutions confirmed the formation of AgNPs because most researchers agree that the absorption spectra of AgNPs have an absorbance peak between 400 and 500 nm [53][54][55][56][57][58][59]. Moreover, due to the deposit observed at the bottom of the tube containing the AgNPs synthesized with 5 mM AgNO 3 and the weak color of the AgNPs synthesized with 1 mM AgNO 3 , we decided to continue the study only with the AgNPs synthesized with 2.5 mM AgNO 3 .…”

Green Synthesis of Antimicrobial Silver Nanoparticles: Exploring Plant-Derived Reducing Agents from Camellia Sinensis, Syzygium aromaticum, and Citrus Sinensis

“…The antibacterial efficacy of the colloids containing AgNPs (Ag-CB, Ag-GT, and Ag-OP) was assessed using a disc diffusion method against gram-positive bacteria (Staphylococcus aureus (PTCC 1431), Bacillus subtilis (PTCC 1420)), Gram-negative bacteria (Escherichia coli (PTCC 1399), Pseudomonas aeruginosa (PTCC 1074)), and one pathogenic fungus (Candida albicans (PTCC 5027)) (Sameena and Thoppil, 2023). The microbial strains employed in this study were sourced from the Microbiology Laboratory, Botany and Microbiology Department, Al-Azhar University.…”