Oxyphospohranes, Slayton A. Evans Jr; peroxidation of disulphides, trisulphides and sulphinothioic acid s-esters, Fillmore Freeman; thermal decomposition of tetoxanes, Lazaro F.R. CaJiCerata; singlet oxygen/peroxide chemistry, Arheh A. Frimer; oxygenation of Llgnin, Sergy M. Shevchenko; remotes participation during sulphide photo-oxidation, Edward L. Clennan.