Spremembe barve jabolčnih rezin med sušenjem : diplomska naloga
Pintar, Cvetka
Spremljali smo spremembe barve jabolčnih rezin cv. idared, nastale med sušenjem v električni sušilnici pri temperaturi 50-70C. Posebej so nas zanimale spremembe barve ter odziv sorte na dodatek ...antioksidantov. Pri tem smo uporabili 0.5% kalijev metabisulfid in 2% proteolitični encim papain. Barve so bile izmerjene s kromatometrom. Med sušenjem se je barva spremenila, rezine so potemnele, odtenki barve so prehajali iz zelene v rdečo. Optimalno barvo jabolčnih rezin smo dosegli pri vzorcu, obdelanem s kalijevim metabisulfitom, rezine so se posvetlile, odtenek barve je ostal zelen. Encim papain je dal dobre rezultate le v začetku sušenja in ni pokazal zadostnega učinka na stabilnost barve. Med šušenjem so se jabolčne rezine: skrčile, premer se je zmanjšal za 19,3%; stanjšale, debelina se je zmanjšala za 58,5%; zmanjšala se je njihova teža za 85,7%.
Type of material - undergraduate thesis
Publication and manufacture - Maribor : [Fakulteta za kmetijstvo] : [C. Pintar], 1999
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