While he was a professor of surgery at the University of Glasgow, Lister became aware of a paper published by the French chemist, Louis Pasteur, showing that food spoilage could occur under anaerobic conditions if micro-organisms were present. Pasteur suggested three methods to eliminate the micro-organisms responsible: filtration, exposure to heat, or exposure to solution/chemical solutions. Lister confirmed Pasteur's conclusions with his own experiments and decided to use his findings to develop antiseptic techniques for wounds. As the first two methods suggested by Pasteur were unsuitable for the treatment of human tissue, Lister experimented with the third idea.