* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
287 ACTIVE PACKAGING High-barrier lid Â® OXYGUARD tray O2 O2 O2 Inside O2 Heat sealable layer Oxygen absorbing layer Barrier layer (EVOH) Protect layer Outside O2 O2 O2 O2 O2 Figure 9.1 Structure of Oxyguardâ¢ tray (courtesy of Toyo Seikan Kaisha Ltd). activated ZERO2â¢ oxygen scavenger materials (developed by Food Science Australia, North Ryde, NSW, Australia and now partly owned by Visy Industries, Melbourne, Victoria, Australia) are just three of many oxygen scavenger developments aimed at the beverage market but are also applicable to other food applications (Rooney, 1995, 1998, 2000; Castle, 1996). It should be noted that the speed and capacity of oxygen scavenging plastic films and laminated trays are considerably lower compared with iron based oxygen scavenger sachets or labels (Hirst, 1998). More detailed information on the technical requirements (i.e. for low, medium and high aw foods and beverages; speed of reaction; storage temperature; oxygen scavenging capacity and necessary packaging criteria) of the different types of oxygen scavengers can be obtained from Labuza and Breene (1989), Idol (1993), Rooney (1995, 1998, 2000) and Hurme and Ahvenainen (1996).