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Uticaj zaštitnih karakteristika ambalažnih materijala na pakovanje sušenog voća
Influence of protective characteristics of packaging material on packed dried fruits
Sažetak
Sušeno voće zbog niskog sadržaja vode i male aw vrednosti predstavlja proizvod vrlo osetljiv na biohemijske promene tokom skladištenja. Od aw vrednosti zavisi intenzitet promene kvaliteta, tj. trajnost takve vrste proizvoda. Ambalažni materijali za pakovanje sušenog voća moraju imati odgovarajuća barijerna svojstva na propustljivost molekula vodene pare, molekula kiseonika, azota i ugljen-dioksida, kao i na propustljivost elektromagnetnog zračenja naročito nižih talasnih dužina u oblasti UV zračenja. Tokom skladištenja kod upakovanog sušenog voća moguće su kvalitativne promene prouzrokovane različitim ambalažnim materijalima. U radu su dati rezultati ispitivanja različitih kombinacija ambalažnih materijala, njihovih barijernih svojstava, kao i kvalitativne promene upakovane sušene jabuke. Kvalitativne promene karakteristične boje i senzornih karakteristika upakovane sušene jabuke zavise od tipa i kombinacije kao i barijernih svojstava primenjenih ambalažnih materijala.
Abstract
Dried fruits are very delicate to biochemical changes during storage, due to low water content, as well as low aw value. The shelf life of these products depends on aw value. Materials for dry fruits packaging are necessary to have appropriate barrier characteristics for water, oxygen, nitrogen and carbon dioxide molecules, as well as for electromagnetic rays, especially those with low wavelengths in UV region. During storage of packed dry fruits, qualitative changes, influenced by different packaging materials, may occur. The results of tested characteristics of different packaging materials, combination and their barrier features, as well as the qualitative changes of packaged dried apples are presented in this paper. The qualitative changes of color and sensory characteristics of packaged dried apples point out to influence of the type, combination as well as the barrier features of used packaging materials.
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