Pharmaceutical substances, and dietetic substances adapted for medical use, for preventing or treating a disease or an injury induced by pathological free radical reactions, namely, pulmonary syndromes, such as acute respiratory distress syndrome, ischemia-reperfusion injury, such as stroke or heart attack, pathogen exposure, such as bacterial or viral infection, hemorrhagic shock, tissue injury induced by inflammation, and tissue injury induced by a chemical agent or a caustic agent, such as...