Marleen M. J. Maartens, Chantel W. Swart, Carolina H. Pohl and J. Lodewyk F. Kock*
Department of Microbial, Biochemical and Food Biotechnology, UNESCO-MIRCEN: Industrial Biotechnology, University of the Free State, P. O. Box 339, Bloemfontein, 9300, South Africa.
Email: [email protected]