Marvin C McMasterDr. Marvin C. McMaster is a retired Ph.D. Organic Chemist, Biochemist, and Analytical chemist. He has done industrial research and process development with DuPont, Kraft Foods, and Ciba/Geigy. He worked as a technical sales representative and area maager for twenty-five years selling HPLC equipment and taught extension courses at U. Mo.-St. Louis. He was a Macintosh computer support specialist at Washington U. Medical School. Currently he writes full-time and teaches at St. Andrew United Methodist Church in Florissant, MO. Read More Read Less