One of the test samples was stored under MAP conditions while another, serving as reference test sample, was not (air conditions).The modification of the atmosphere in the packages was carried out with a gas-packaging unit . Air products (Vilvoorde, Belgium) suppliedthe gases. The composition of the headspace was measured during the flushing period by using a CO2/O2gas analyzer (Servomexfood packaged, series1400, UK). Afterwards storage was started(time 0).