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Título: | 13C nuclear magnetic resonance monitoring of free fatty acid release after fish thermal processing |
Autor: | Medina, Isabel CSIC ORCID ; Sacchi, Raffaele; Aubourg, Santiago P. CSIC ORCID | Palabras clave: | Tuna DHA Free fatty acids Hydrolysis 13C NMR Raw Thunnus alalunga lipids |
Fecha de publicación: | 1994 | Editor: | Springer Nature | Citación: | Journal of the American Oil Chemists’ Society 71(5): 479-482 (1994) | Resumen: | 13C Nuclear magnetic resonance spectroscopy was applied to the study of lipid hydrolysis occurring during industrial canning of tuna (Thunnus alalunga). An increase in the free fatty acid (FFA) level was observed after cooking and sterilization, and a different FFA pattern was found when storage of the frozen raw material and thermal steps (cooking and can sterilization) were compared. Lipolysis in raw muscle occurs preferentially in thesn-1 andsn-3 acyl positions of triacylglycerols, with a consequent cleavage of saturated and monounsaturated fatty acids. After thermal processing, an increase of docosahexaenoic acid (DHA) was found in the FFA fraction, as well as a relative decrease of the peak intensity of DHA in thesn-2 position of triacylglycerols. This finding indicates a different mechanism of FFA release during the frozen storage and thermal processing of raw fish. | Descripción: | 4 páginas, 1 tabla, 2 figuras | Versión del editor: | http://dx.doi.org/10.1007/BF02540657 | URI: | http://hdl.handle.net/10261/60097 | DOI: | 10.1007/BF02540657 | ISSN: | 0003-021X | E-ISSN: | 1558-9331 |
Aparece en las colecciones: | (IIM) Artículos |
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