The author is a retired professor from Columbus State University, Columbus, Georgia, U.S.A. He retired in 1997 as Associate Professor of Chemistry after 28 years of service. He still continues to w...voir plusThe author is a retired professor from Columbus State University, Columbus, Georgia, U.S.A. He retired in 1997 as Associate Professor of Chemistry after 28 years of service. He still continues to work for the university on a part-time basis.voir moins