标题:Investigation on Nitro Compounds of Polycyclic Aromatic Hydrocarbons. I. Nitration Rates of Polycyclic Aromatic Hydrocarbons by Nitric Acid-Acetic Acid Mixture and Photodecomposition Rates of the Nitro Derivatives under Sunlight (Regular Presentations) (Proceedings of the 9th Symposium on Environmental Pollutants and Toxicology)