Paul L.H. McSweeney is Professor of Food Chemistry in the School of Food and Nutritional Sciences, University College, Cork, Ireland.Patrick F. Fox was Professor and Head of the Department of Food Chemistry at University College, Cork, Ireland, from 1969 to 1997; he retired in December 1997 and is now Emeritus Professor of Food Chemistry. Alan L. Kelly is Professor of Food Chemistry in the School of Food and Nutritional Sciences, University College, Cork, Ireland.