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Tokoferoli in polifenoli v oljčnih oljih slovenske IstreButinar, Bojan ; Bučar-Miklavčič, MilenaPolifenoli (PfOH) in tokoferoli so antioksidanti rastlinskega izvora. Plodovi oljke (Olea europaea L.) vsebujejo najveř PfOH sekoiridoidnega tipa - oleuropein, ligstrozid, oleozid in pa seveda ... njihove razpadne produkte, predvsem oleuropein aglikon (3,4-DHPEA-EA), dialdehidno obliko oleuropein aglikona (3,4-DHPEA-EDA) ter tirosol (p-HPEA) in hidroksitirosol (3,4-DHPEA). V naǴem laboratoriju smo 16 vzorcem ekstra deviǴkih oljřnih olj (OO) letnika 1994, 16 vzorcem OO letnika 1996 in 21 vzorcem OO letnika 1997 dolořevali skupne PfOH. Vsa OO so bila pridelana v slovenski Istri. NajviǴjo vsebnost skupnih PfOH so imela OO stisnjena iz cv. ŸIstrska belicaŐ oziroma OO, kjer jeimel ta kultivar veřji deleÍ. Izjema so bila OO, kjer so plodove pred stiskanjem hranili v morski vodi oziroma slanici. Taka olja so senzoriřno in antioksidativno revnejǴa. Vzorcem OO letnika 1997 smo dolořili vsebnost PfOH p-HPEA (4,2 - 57,0 mg/kg) in 3,4-DHPEA (0.0 - 54.2 mg/kg). Tokoferoli (vitaminE) so antioksidanti, ki se predvsem v obliki ?-tokoferola pojavljajo vekstra deviǴkih OO. Rezultati analiz vsebnosti skupnih tokoferolov (ST) v OO slovenske Istre (letniki 1995, 1996, 1997 in 1998) v mg /100 g OO so 3,18; 6,73; 4,09 in 6,25. NajviǴje vrednosti ST so imela OO stisnjena iz cv. "Leccino".Source: Antioksidanti v živilstvu = Antioxidants in food science and technology (Str. 77-91)Type of material - conference contributionPublish date - 2000Language - slovenianCOBISS.SI-ID - 2447992
Author
Butinar, Bojan |
Bučar-Miklavčič, Milena
Topics
rastlinska olja |
antioksidanti |
hidroksitirosol |
oleuropein |
oljčno olje |
polifenoli |
slovenska Istra |
tokoferoli |
vegetable oils |
antioxidants |
hydroxytyrosol |
oleuropeine |
olive oil |
polyphenols |
Slovene Istra |
tocopherols
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Database name | Field | Year |
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Butinar, Bojan | 10375 |
Bučar-Miklavčič, Milena | 18697 |
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