1. Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, U.K.
2. Diamond Light Source Ltd., Diamond House, Harwell
Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K.
3. BP Formulated Products
Technology, Technology Centre, Whitchurch Hill, Pangbourne RG8 7QR, U.K.