Study compares antibacterial and antioxidant effects of silver and cerium oxide nanoparticles from crab shell waste, indicating their potential in tackling infections and oxidative stress.
This study focused to compare the synthesis, characterization and antibacterial, and antioxidant efficacy of chitosan‐mediated silver (Ag) and cerium oxide (CeO 2 ) nanoparticles (NPs) from marine biowaste of Portunus sanguinolentus . The Ag and CeO 2 NPs were synthesized and preliminarily characterized by microscopic and spectroscopic techniques, which revealed chitosan‐assisted Ag and CeO 2 NPs were mostly spherical and irregular in form, respectively. Findings of the NPs for their effectiveness in combating bacteria: chitosan‐assisted Ag and CeO 2 NPs exhibited excellent activity against Bacillus subtilis (23.3 ± 0.28 and 15.2 ± 0.19 mm) followed by Klebsiella pneumoniae (20.3 ± 0.11 and 18.5 ± 0.28 mm), respectively. The findings of in vitro antioxidant activity revealed that chitosan‐mediated NPs possess significant reducing power and hydroxyl radical scavenging properties; the concentration was raised to 125 µg/mL, and the scavenging capacity of Ag NPs improved drastically to 63.8% and 58.7%, for CeO 2 NPs. The findings of chitosan‐mediated Ag and CeO 2 NPs derived using crab's shell waste reveal that they possess a potential effect on bacterial infections and free radicals.
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Archana et al. (2026) studied this question.
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