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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Nutritional quality of fresh and heated Aleppo pine (Pinus halepensis Mill.) seed oil: Trans-fatty acid isomers profiles and antioxidant properties
Journal of Food Science and Technology, Volume 51, No. 8, Year 2014
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Description
Numerous studies have focused on trans fatty acids (TFA) technologically produced by partial hydrogenation of oils. However, TFA can also be present in fresh oils. For this reason, cis fatty acid (CFA), TFA and conjugated linoleic acid (CLA) of fresh and heated Aleppo pine seed oil (APSO) at frying temperature (180 °C) were evaluated and correlated with the antioxidant characteristics. Results showed that fresh APSO had a low oleic/linoleic ratio O/L (0.4). Total TFA in fresh APSO reached 1%. The predominant TFA was 18:2 n-6 (t9, t12) in both fresh and heated APSO. Individual TFA increased with significant differences (p<0.05) with heating time. CLA occurred after 4 h and significantly increased (p<0.05) accounting 10% of total TFA after 10 h. Total TFA are negatively correlated with α-tocopherol, γ-tocopherol (p<0.05) and carotenoïds (p<0.01) and positively correlated with remaining DPPH. Oil stability index (OSI) showed significant negative correlation with TFA (r=-0.925; p=0.008). A principal component analysis (PCA) showed a clear discrimination between fresh and heated oils. Temperature, heating time, unsaturation degree and antioxidants are combined factors which significantly affect the isomerization rate and nutritional quality of APSO. © 2012 Association of Food Scientists & Technologists (India).
Authors & Co-Authors
Dhibi, Madiha
Tunisia, Monastir
Université de Monastir
Issaoui, Manel
Tunisia, Monastir
Université de Monastir
Brahmi, Faten
Tunisia, Monastir
Université de Monastir
Mechri, Beligh
Tunisia, Monastir
Université de Monastir
Mnari, Amira
Tunisia, Monastir
Université de Monastir
Chéraif, Imed
Tunisia, Monastir
Université de Monastir
Harzallah-Skhiri, Féthia
Tunisia, Monastir
Institut Supérieur de Biotechnologie de Monastir
Gazzah, Noureddine
Tunisia, Monastir
Université de Monastir
Hammami, M. B.
Tunisia, Monastir
Université de Monastir
Statistics
Citations: 21
Authors: 9
Affiliations: 2
Identifiers
Doi:
10.1007/s13197-012-0664-5
ISSN:
00221155
e-ISSN:
09758402
Research Areas
Food Security