Dr. Narayan Chakrabarty, Ph.D., F.I.C.S., is a visiting professor in the Post-Graduate Department of Zoology, Maulana Azad College, Calcutta University. He is also a scientific consultant and director, West Bengal Biotech Development Corporation, Department of Biotechnology, Government of West Bengal, India. Dr. Chakrabarty is a member of the Departmental Technical Committee for Biotechnology of the Govt. of West Bengal. He authored a book on organic reaction mechanism. He has vast experience in conducting programs for estimating and remediating arsenic toxicity in rural Bengal. He was also a resource person in various programs under the sponsorship of UNICEF and the Government of India.