Professor Mahendra Rai UGC-BSR Fellow is presently Visiting Professor in Department of Microbiology, Nicolaus Copernicus University, Torun, Poland. Formerly he was Headead at the Department of Biotechnology, Sant Gadge Baba Amravati University at Amravati, Maharashtra, India. He was Visiting Scientist at different Universities like University of Geneva, Switzerland, Debrecen University, University of Campinas, Brazil, Nicolaus Copernicus University, Poland. His area of expertise includes microbial biotechnology and nanobiotechnology. His present research interests are application of nanobiotechnology in medicine and agriculture, in particular, the use of metallic nanoparticles as a new generation of antimicrobials. He has published more than 450 research papers in India and abroad. In addition, he has edited/authored more than 65 books.