BIOSYSTEMS ENGINEERING RESEARCH REVIEW 17 UCD SCHOOL OF BIOSYSTEMS ENGINEERING UNIVERSITY COLLEGE DUBLIN, BELFIELD, DUBLIN 4, IRELAND Tel +353-1-7167484 Fax +353-1-7167415 E-mail biosystems@ucd.ie Web site http://www.ucd.ie/eacollege/biosystems/ Document Number: ISSN 1649-475X May 2012 Editors: Enda Cummins and Tom Curran