1. Enocell Ltd., BioCity Scotland, Motherwell ML1 5UH, U.K.
2. Chemical Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.
3. National Physical Laboratory, Hampton Rd, Teddington TW11 0LW, U.K.
4. Department of Chemical and Process Engineering, University of Strathclyde, Glasgow G1 1XJ, U.K.
5. Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, U.K.