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Issue 9 (2) 2010 pp. 171-188

Anna Gramza-Michałowska, Barbara Stachowiak

Poznań University of Life Sciences

The antioxidant potential of carotenoid extract from Phaffia rhodozyma

Abstract

Background. Carotenoids are components playing an important role in biological systems, starting with light protection, immunoenhancement, protection against carcinogens and finishing with antioxidant activity. Food additives market is based mainly on synthetic additives; however, higher consumer awareness has resulted in an increased use of natural substances. One of the potentially antioxidant compounds could be a lipid soluble carotenoid – astaxanthin (xanthophyll), found in the microbial world. The aim of this study was to evaluate the antioxidant potential of carotenoid extract from Phaffia rhodozyma extract.

Material and methods. Carotenoids extracted from Phaffia rhodozyma and the astaxanthin standard was selected for the investigations. Antioxidant potential was evaluated by radical scavenging activity (DPPH and ABTS•+ radicals) and in lipid oxidative stability measurements (Rancimat, Oxidograph and Schaal oven tests).
Results. It was found that the examined extracts presented a significantly higher ability to scavenge the DPPH radical in comparison to the ABTS•+ radical. Evaluations of linoleic acid emulsion oxidative stability showed a higher antioxidant effect of the Phaffia rhodozyma extract than that of astaxanthin during 19 h of incubation. That potential however, was not detected in linoleic acid emulsion incubated for 96 h, where both additives accelerated oxidation process. In bulk sunflower oil a protective effect of Phaffia rhodozyma extract was observed. In both Rancimat and Oxidograph tests antioxidant activity measured using the induction period was evaluated. However, results of the Schaal oven test indicated that a 144 h incubation of sunflower oil offered a significantly better protection of the lipid against oxidation when the Phaffia rhodozyma extract was added.
Conclusions. On the basis of recorded results it was found that the Phaffia rhodozyma carotenoid extract showed moderate antioxidant properties, depending on the environmental conditions of methods used.

Keywords: Phaffia rhodozyma, carotenoids, astaxanthin, lipids oxidation, radical scavenging activity
pub/.pdf Full text available in english in Adobe Acrobat format:
http://www.food.actapol.net/issue2/volume/5_2_2010.pdf

For citation:

MLA Gramza-Michałowska, Anna, and Barbara Stachowiak. "The antioxidant potential of carotenoid extract from Phaffia rhodozyma." Acta Sci.Pol. Technol. Aliment. 9.2 (2010): 171-188.
APA Gramza-Michałowska A., Stachowiak B. (2010). The antioxidant potential of carotenoid extract from Phaffia rhodozyma. Acta Sci.Pol. Technol. Aliment. 9 (2), 171-188
ISO 690 GRAMZA-MICHAłOWSKA, Anna, STACHOWIAK, Barbara. The antioxidant potential of carotenoid extract from Phaffia rhodozyma. Acta Sci.Pol. Technol. Aliment., 2010, 9.2: 171-188.