1. ; Laboratory of Oils and Fats, Department of Agri-Food Industry, Food & Nutrition, “Luiz de Queiroz” College of Agriculture; University of São Paulo; Av. Pádua Dias 11 Piracicaba SP CEP 13418-900 Brazil
2. ; Department of Biochemistry; Memorial University of Newfoundland; St. John's NL A1B 3X9 Canada