1. Prof. of Chemical Engrg., Univ. of Manchester Inst. of Sci. and Tech., Manchester, United Kingdom; formerly, Reader in Biochemical Engrg., Dept. of Chemical Engrg., Univ. Coll. of Swansea, Swansea, Wales.
2. Assoc. Prof. of Chemical Engrg., State Univ. of New York, Buffalo, N.Y. ; formerly, Sci. Research Council Sr. Visiting Fellow, Dept. of Chemical Engrg., Univ. Coll. of Swansea, Swansea, Wales.