Karotenoidi v oljčnem olju

Bešter, Erika; Bučar-Miklavčič, Milena; Butinar, Bojan; Valenčič, Vasilij

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Title:	Karotenoidi v oljčnem olju
Authors:	ID Bešter, Erika (Author) ID Bučar-Miklavčič, Milena (Author) ID Butinar, Bojan (Author) ID Valenčič, Vasilij (Author)
Files:	http://www.dlib.si/details/URN:NBN:SI:DOC-FXL1J7BW
Language:	Slovenian
Work type:	Not categorized
Typology:	1.02 - Review Article
Organization:	UPR - University of Primorska
Abstract:	The pigments profile of virgin olive oil is determined by the pigments initially present in the fruits and their derivatives formed during the extraction process. The presence of other carotenoids or chlorophyll pigments at levels other than that associated with the extraction process indicate that oil has been adulterated or the extraction process was incorrect. The yellow pigments in olive oil are carotenoids and the green pigments are chlorophyll pigments. The amount of carotenoids in oil depends on variety, maturation index, treating of olive fruits before extraction, extraction process, and oil treating. Carotenes as well as xantophylls were identified in virgin olive oils. Lutein is usually the predominating compound in the carotenoid fraction of pigments, followed by B-carotene. The rest of carotenoid fraction are minor xantophylls, such as 5,6-epoxides, 5,8-epoxides or furanoids, and xantophyll esters. Cis-isomeres are also formed during the extraction process. The vitamin activity of cis-isomeres is lower as the activity of trans-isomeres. Pigment profile of olive oil is a useful tool for variety classification and authenticity determination. Carotenoids can act as antioxidants or prooxidants. Their antioxidant/prooxidant activity depend on concentration, solvent, and free radicals structure, presence of other antioxidants, metals and oxygen. The antioxidant activity of carotenoids has not been satisfactory explained as yet. There are three possible mechanisms of carotenoids antioxidant activity. Carotenoids are singlet oxygen quenchers and free radical scavengers and they act as light filters. Findings about carotenoids activity in vitro should not be translated to activity in biological systems. Carotenoids are an important part of human diet because of their antioxidant activity and some of them are also provitamins A. Carotenoids probably prevent some diseases, such as cardiovascular diseases and certain cancers, but can in certain circumstances increase the risk of disease.
Keywords:	oljčno olje, karotenoidi, antioksidanti
Publisher:	Centro di ricerche scientifiche della Repubblica di Slovenia
Year of publishing:	2007
Number of pages:	str. 139-148
Numbering:	Letn. 17, št. 1
PID:	20.500.12556/RUP-5244
ISSN:	1408-533X
UDC:	665.327.3:615.01
COBISS.SI-ID:	1238995
Publication date in RUP:	10.07.2015
Views:	8711
Downloads:	45
Metadata:
:	BEŠTER, Erika, BUČAR-MIKLAVČIČ, Milena, BUTINAR, Bojan and VALENČIČ, Vasilij, 2007, Karotenoidi v oljčnem olju. [online]. 2007. Vol. 17, no. 1, p. 139–148. [Accessed 14 March 2025]. Retrieved from: http://www.dlib.si/details/URN:NBN:SI:DOC-FXL1J7BW Copy citation