FIZIKALNO-KEMIJSKE LASTNOSTI IN ANTIOKSIDACIJSKA AKTIVNOST PETIH IRANSKIH SORT GRANATNEGA JABOLKA (Punica granatum L.) V ČASU ZRELOSTI

Kosar NIKDEL, Esmaiel SEIFI, Hamed BABAIE, Mehdi SHARIFANI, Khodayar HEMMATI

Povzetek


Namen raziskave je bil primerjati fizikalno-kemijske lastnosti in antioksidacijsko aktivnost petih sort granatnega jabolka. Masa plodov je bila med 109.27 in 78.07 g. Debelina olupka je znašala od 5.05 do 2.70 mm. pH, celokupna vsebnost topnih snovi in vsebnost titrabilne kislosti so bili v območju 4.23 do 4.36, 20.00 (◦Brix) do 14.05 (◦Brix), 0.04 do 0.007 mg na 100 g soka. Vsebnost askorbinske kisline je bila med 4.73 in 1.98 mg na 100 g soka. Vsebnost celokupnih fenolov je bila med 6.36 in 1.78 mg GAE/100 ml, vsebnost celokupnih flavonoidov pa med 4.93 in 2.24 mg GAE/100 ml. Antioksidacijska aktivnost je variirala med 86.77 % in 79.54 %. Vsebnost reducirajočih sladkorjev je bila med 5.81 in 1.72 mg/100g, vsebnost glukoze pa med 3.48 in 1.14 mg/100g. Iz rezultatov sledi, da je sorta najpomembnejši dejavnik, ki vpliva na fizikalno-kemijske lastnosti in antioksidacijsko aktivnost granatnega jabolka.

Ključne besede


askorbinska kislina; indeks zrelosti; fenolne spojine fizikalno.kemijske lastnosti; granatno jabolko

Celotno besedilo:

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DOI: http://dx.doi.org/10.14720/aas.2016.107.2.02

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