Prof. Dr. M. R. Rajan is a distinguished researcher whose work spans aquaculture toxicology, green nanotechnology, environmental biotechnology, and fish health management. His research primarily explores the synthesis, characterization, and safe application of diverse metal and metal oxide nanoparticles—including selenium, silver, copper oxide, manganese oxide, magnesium oxide, chromium oxide, aluminum oxide, zinc oxide, carbon quantum dots, and graphene quantum dots—and their physiological impacts on numerous freshwater fish species. A major focus of his work is the incorporation of nanoparticles into fish diets to enhance growth performance, haematological and biochemical responses, antioxidant activity, and overall aquatic health, helping advance the emerging field of nanonutrition. He contributes significantly to the development of green-synthesized nanoparticles using plant extracts and waste-derived materials, assessing their antibacterial, larvicidal, and biomedical potentials, as well as their suitability for aquaculture applications. His studies also address key environmental challenges, including wastewater toxicity, tannery effluent pollution, and eco-friendly remediation strategies, while other works explore the role of probiotic gut microbiota in improving fish immunity and disease resistance. With 44 scientific publications and more than 220 citations, Prof. Dr. M. R. Rajan research offers valuable insights into sustainable aquaculture practices, nanoparticle biosafety, environmental health, and innovative nanobiotechnological solutions for aquatic systems.
Profile: Scopus
Featured Publications
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Varghese Edwin Hillary, V., Dayana Senthamarai, M., Antony Ceasar, A., Ignacimuthu, S., & Rajan, M. R. (2025). Characterization of a silver nanoparticle derived from the fruit peel of Myristica fragrans on mosquito control. International Journal of Tropical Insect Science.
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Dayana Senthamarai, M., Edwin Hillary, V., Rajan, M. R., & Antony Ceasar, A. (2025). Phyto-synthesis of selenium nanoparticles using Mentha spicata extract and its larvicidal and antibacterial activities. Journal of Asia-Pacific Entomology, 28(1), 102370.
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Malavika, V., Rajan, M. R., Soundhariya, N., Prethika, J., & Chandrakala, V. (2025). Comparative evaluation of chemically and green-synthesised carbon quantum dots for aquatic applications. Journal of Environmental Nanotechnology, 14(3), 505–515.
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Chinnadurai Kaleeswaran, M., Dayana Senthamarai, M., & Rajan, M. R. (2024). Evaluation of disparate multiplicities of copper oxide nanoparticles integrated feed on the growth and hematology of koi carp. Journal of Toxicological Studies, 2(1), 497.
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Dayana Senthamarai, M., Rekha, M., & Rajan, M. R. (2024). Incorporation of nano selenium in fish diet and assessment of growth performance and biochemical criteria of Labeo rohita. Journal of Environmental Nanotechnology, 13(1), 01–09.*