20.500.12556/DKUM-20862 SEPARACIJA β -SITOSTEROLA IZ RASTLINSKIH OLJ SEPARATION OF β -SITOSTEROL FROM PLANT OILS V prvem delu diplomske naloge smo določili vsebnost β- sitosterola v rastlinskih oljih (surovo repično in sončnično olje, rafinirano sončnično in repično olje, olje koruznih kalčkov in bučno ter sojino olje). Z uporabo superkritičnih fluidov smo ločili oz. skoncentrirali β-sitosterol iz rastlinskih olj. V ta namen smo izvedli visokotlačne ekstrakcije raslinskih olj (olja koruznih kalčkov, surovo repično in sončnično olje in bučno olje), kjer smo določili vsebnost β-sitosterola v ekstraktu in ostanku po visokotlačni ekstrakciji. V drugem delu diplomske naloge smo izvedli dvostopenjsko visokotlačno ekstrakcijo surovega repičnega olja pri različnih obratovalnih pogojih in določili vsebnost β-sitosterola posamezne stopnje ekstrakcije. S tem smo dobili optimalne pogoje visokotlačne ekstrakcije glede na vsebnost β-sitosterola. Določili smo tudi antioksidativno aktivnost surovega repičnega olja in repičnega olja z dodatkom β-sitosterola. In the first part of the thesis, the content of β-sitosterol in vegetable oils (rapeseed and sunflower crude oil, refined sunflower and rapeseed oil, corn oil and pumpkin seed and soybean oil) was determined. By the use of supercritical fluids β-sitosterol was separated and concentrated from the vegetable oils. Therefore, high-pressure extractions of plant oils (corn oil, crude rapeseed oil and sunflower and pumpkin seed oil) were performed, and the content of β-sitosterol in the extract and in the residue was determined. In the second part of the thesis, a two-stage high-pressure extraction of crude rapeseed oil at different operating conditions was performed and the content of β-sitosterol was determined in each stage of extraction. The best operation conditions of extraction regarding the content of β-sitosterol were obtained. Additionally, the antioxidant activity of crude rapeseed oil and rapeseed oil with addition of β-sitosterol was determined. rastlinska olja steroli β-sitosterol visokotlačna ekstrakcija antioksidativna aktivnost plant oils sterols β-sitosterol high- pressure extaction antioxidant activity true true false [K. Šmic] Slovenski jezik Angleški jezik Diplomsko delo 2011-10-05 11:35:28 2011-10-07 14:14:20 2022-04-14 08:19:59 2023-12-27 03:28:41 2011 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 664.1.035:665.334.9(043.2) 16034070 URN:SI:UM:DK:8JN1WMDD UNI_Smic_Katja_2011.pdf UNI_Smic_Katja_2011.pdf 1 49ED7C7C19200B0E887EE739A3817FF7 5031fd33457230c8cbfcdc67f7ea2c7ee5410901f306e24d32bb0d47bc09f25c b8ec4f45-7c05-11eb-bb7a-00155d0001ca 20.500.12556/dkum/575d92a3-400a-47b2-8079-cd347f0ba2bb https://dk.um.si/Dokument.php?lang=slv&id=26162 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0