Free radicals and pro-oxidants in cigarettes damage blood vessels and oxidize LDL cholesterol. The oxidative enzyme catalyses the formation of monolignol radicals. Typical equations showing persulfate generation of hydroxyl radicals follows. The antioxidants present in cherry extracts act as inhibitors of the free radicals. This reacts further to give hydroperoxides, which break up to give hydroxyl radicals. Ischemia also induces production of oxygen free radicals and other reactive oxygen species. Compounds known as free radicals form when food is irradiated. Glycated hemoglobin causes an increase of highly reactive free radicals inside blood cells. Such species include free radicals and peroxides. This action catalyzes production of reactive radicals and reactive oxygen species. Anarchist attacks on Wall Street produced fears of radicals and terrorists. Flavorings can harm lung cells by producing free radicals and inflammation. There are a great variety of these processes that produce fuel radicals and oxidizing radicals. Hyperconjugation is commonly invoked to explain the stability of alkyl substituted radicals and carbocations. This was the position of the radicals and socialists.