HighlightsThe gold nanoparticles (AuNPs) were synthesised using leaf extract of Alternanthera bettzickiana.The Au NPs were characterized using UV-vis, XRD, FTIR, SEM, TEM and Zeta potential.A simple, quick and reproducible method for the environmentally friendly synthesis of Au NPs without the need for expensive reducing agents.The cytotoxic effect of the green synthesized Au NPs against A549 human lung cancer cell lines provided a vigorous evidence of anticancer activity of Au NPs.The toxicity study of the green synthesized Au NPs on Danio rerio (Zebra fish) embryo was evaluated

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The goal of the present work is to fabricate selenium nanoparticles utilising Morinda citrifolia leaves extract via green approach. UV-Vis spectroscopy, FT-IR, and TEM were used to characterise the green nanoparticles. The size of generated SeNPs in Morinda citrifolia was anticipated to be 12-160 nm based on TEM images. The antioxidant activity of selenium NPs was discovered to be 66.7 to 83.7% of free radical inhibtion. When the concentration of nanoparticles rises, the viability of cancer cells decreases. It shows that biosynthesized selenium nanoparticles have anticancer properties that depend on the concentration. The brine shrimp lethality assay revealed that Morinda citrifolia mediated selenium nanoparticles have low cytotoxic effects.

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The marine algae Gelidium amansii is one of the important edible marine red algae having many biomedical applications. In this study, the red algae of Gelidium amansii were analysed for their antibacterial activity and antifungal activity against organisms such as Escherichia coli, Staphylococcus aureus, Bacillus cereus, Micrococcus luteus, Klebsiella pneumonia and Pseudomonas aeruginosa and Candida albicans, Candida tropicalis, Aspergillus niger, Aspergillus flavus, Aspergillus fumigatus. The antimicrobial susceptibility test for the isolates by agar well diffusion method using following acetone, ethanol, and methanol-toluene. The Minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and Minimum fungicidal concentration (MFC) using the following extracts. The results are showing the antibacterial and antifungal activity of red algae is good.