New food engineering research trends Ionizing irradiation of foods Albert Ibarz Fruits and vegetables dehydration in tray dryers Dionissios P. Margaris and Adrian Gabriel Ghiaus Ultrasound in fruit processing Sueli Rodrigues and Fabiano A.N. Fernandes Optimisation of the conversion of ergosterol in mushrooms to vitamin D and its bioavailability Conrad O. Perera and Viraj J. Jasinghe Protein hydrolysis with enzyme recycle by membrane ultrafiltration Antonio Guadix Emilia M. Guadix and Carlos A. Prieto The development of the processing of yuba (protein lipid film) Li Zaigui Shen Qun and Lin Qing Far infrared heating in paddy drying process Naret Meeso A novel two stage dynamic packaging for respiring produce: concepts and mathematics Tobias Thiele and Benno Kunz