MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541123053 A) filed by Vellore Institute Of Technology, Vellore, Tamil Nadu, on Dec. 5, 2025, for 'green synthesis of metal oxide nanoparticles with antibacterial properties.'
Inventor(s) include Dr. Gayathri. M; and Ms. Varshini M.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure provides a method for synthesizing metal oxide nanoparticles by preparing an aqueous extract from Pseuderanthemum latifolium leaves by mixing leaves with water at 1:10 ratio, heating at 90 C for 5 hours with stirring, and filtering to obtain clear extract. The method includes preparing a metal precursor solution by dissolving zinc acetate dihydrate or copper sulfate pentahydrate in water at 91-100 mM concentration, combining the extract with metal precursor solution at 1:9 volume ratio, adjusting pH to 10-12 using sodium hydroxide, heating at 80 C for 5 hours with stirring, centrifuging at 7000 rpm for 15 minutes, washing the pellet with water, and drying at elevated temperature for 24 hours to obtain metal oxide nanoparticles. The synthesized nanoparticles exhibit antibacterial activity against Gram-positive and Gram-negative bacteria with minimum inhibitory concentrations of 2.5-5.0 mg/mL."
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