Naslov
The effect of processing conditions on the nonacylglycerol constituents of sunflower oil

Autori
Rade, Desanka ; Štrucelj, Dubravka ; Mokrovčak, Željko ; Škevin, Dubravka ; Dražić-Kaić, Mirjana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 4th Croatian Congress of Food Technologists, Biotechnologists and Nutritionists, Central European Meeting / Tripalo, Branko - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2001, CD-ROM, FT/SC_09

Skup
The 4th Croatian Congress of Food Technologists, Biotechnologists and Nutritionists, Central European Metting

Mjesto i datum
Opatija, Hrvatska, 03.10.2001. - 05.10.2001

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
cold pressing; rafination; sunflower oil; unsaponifiable fractions

Sažetak
In this study the samples of sunflower oil from single refining steps and samples of cold pressed sunflower oil were investigated. The content and composition of carotenes, sterols, chlorophylls and of unsaponifiable fractions was determined using spectrophotometric and different chromatographic methods (gas chromatography, thin layer chromatography, column chromatography). To obtain the data about the acidity and oxydative status of the oil samples, basic oil analysis (FFA, PV, spectrophotometric analyses in UV area) were performed. The results showed that predominating carotene in sunflower oil is lutein, and that the total amount of carotenes during refining process was reduced for 80-90 %. The major sterol in sunflower oil, as well as in other vegetable oils, is ß-sitosterol (about 70%). The other important sterols in sunflower oil are: D7-stigmastanol, stigmasterol, campesterol, D5-avenasterol and D7-avenasterol. The composition of sterols in nonrefined and refined oil samples was more or less the same, while the content of sterols during refining process decreased for 30 - 40 %.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA