Professor Mahendra Rai is a UGC-Basic Science Research Faculty Fellow and former head of the Department of Biotechnology, Sant Gadge Baba Amravati University, India. Presently, he is a visiting Scientist at the Department of Microbiology, Nicolaus Copernicus University, Poland. His areas of expertise include microbial biotechnology and nanobiotechnology. Currently, his group’s main research interest is green synthesis of metal nanoparticles particularly using fungi and their applications as nanoantimicrobials against pathogenic microbes. Prof. Rai has received several prestigious awards, including the Medini Award by the Government of India. He has been featured in Stanford’s list of the top 2% of scientists in nanoscience. Dr. Indarchand R. Gupta completed his Masters in the subject of Biotechnology in the year 2004, and Ph.D. in the year 2020 under the supervision of Professor Mahendra Rai at the Department of Biotechnology, Sant Gadge Baba Amravati University, Amravati, India. Presently he is working as Assistant Professor at Government Institute of Science, Aurangabad, India. His area of interest is nano-toxicology and animal cell culture. His study is mainly focused on in vitro cytotoxicity assessment of silver nanoparticles on different animal cell models. He has published over 35 research articles and book chapters. For his research work he has been awarded by ‘ASIO 2016 International Toxicologist Travel Award’ by Association of Scientists of Indian Origin, a regional chapter of Society of Toxicology, USA.