This study reports the development of selected indicators affecting changes in food quality and safety of selected long-life canned (Szeged goulash, canned chicken meat, pork pâté, canned tuna fish) and dehydrated (instant goulash soup) food during a two-year storage experiment at four different temperatures. The storage temperatures were selected to represent Arctic (−18 °C), temperate (5 °C), subtropical (25 °C) and tropical (40 °C) climatic zones where such food is likely to be stored during, for example, humanitarian and military missions. Microorganism amounts below the detection limit (p < 0.05), regardless of the storage temperature (p ≥ 0.05), were monitored in canned samples. The contents of dry matter, fat and proteins did not change during storage, regardless of the storage temperature (p ≥ 0.05). During the 24-month storage, all food showed an increase in the level of ammonia (p < 0.05) and the TBARS-value (p < 0.05), whereas the rate of increase in both parameters was significantly higher at higher storage temperatures (p < 0.05). The losses of individual amino acids during storage ranged from 5% rel. calculated on the amino acid contents in Month “0” up to 15% rel. (p < 0.05). With storage temperatures above the freezing point, the hardness values decreased with the increase in the storage temperature (p < 0.05) and prolongation of the storage period (p < 0.05). Moreover, with temperatures of −18 °C, the development of hardness, measured as the “decrease rate”, was significantly higher compared to the absolute values.

Centre of Polymer Systems University Institute Tomas Bata University in Zlín Tr T Bati 5678 760 01 Zlin Czech Republic

Department of Environmental Protection Engineering Faculty of Technology Tomas Bata University in Zlín Nam T G Masaryka 5555 760 01 Zlin Czech Republic

Department of Food Technology Faculty of Technology Tomas Bata University in Zlín Nam T G Masaryka 5555 760 01 Zlin Czech Republic

Laboratory of Food Quality and Safety Research Department of Logistics Faculty of Military Leadership University of Defence Kounicova 65 662 10 Brno Czech Republic

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