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Type: Artigo de periódico
Title: Effect of rosa mosqueta (Rosa rubiginosa) extract on the performance of Chilean hazelnut oil (Gevuina avellana mol.) at high temperature
Author: Robert, P
Romero, N
Ortiz, J
Masson, L
Barrera-Arellano, D
Abstract: The effect of the addition of rosa mosqueta husk extract (RME) on thermal oxidation of nontreated (HZO) and treated (THZO) Chilean hazelnut seed oil was evaluated at 180 degrees C for 18 h. THZO to which was added 339 mg/kg of alpha-tocopherol was used as a comparison model because RME supplied 314 mg/kg of a-tocopherol. Formation of polar compounds and degradation of tocols and carotenoid pigments were studied in these model systems. Degradation of trans-rubixanthin, trans-lycopene, and trans-p-carotene followed a pseudo first-order kinetics model. These pigments showed the same degradation rate in both HZO and THZO. The addition of RME to HZO and THZO decreased significantly (P < 0.05) the formation of polar compounds, lead to less degradation of tocols, and improved their oxidative stability with respect to oils without RME. This behavior can be attributed to carotenoid-tocopherol interaction, suggesting that these pigments can protect tocols against degradation at high temperature.
Subject: carotenoid pigments
Chilean hazelnut oil
polar compounds
Rosa rubiginosa
thermal oxidation
Country: EUA
Editor: Amer Oil Chemists Soc A O C S Press
Citation: Journal Of The American Oil Chemists Society. Amer Oil Chemists Soc A O C S Press, v. 83, n. 8, n. 691, n. 695, 2006.
Rights: fechado
Identifier DOI: 10.1007/s11746-006-5025-y
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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