1. Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano, Italy
2. Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada
3. Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan Yonezawa, Yamagata-ken 992-8510, Japan