selected publications academic article Ab initio study of the structural, electronic, and thermodynamic properties of linear perfluorooctane sulfonate (PFOS) and its branched isomers 2009-8-1 letter Response to Comment by Sierra Rayne and Kaya Forest on ''Ab initio study of the structural, electronic, and thermodynamic properties of linear perfluorooctane sulfonate (PFOS) and its branched isomers" [Chemosphere 76 (8) (2009) 1143-1149]. 1457-1458. 2009-11-1