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Título

Effects of high pressure on unsaturated fatty acids

Autor Povedano, Isabel; Guignon, Bérengère; Montoro, Raúl; Sanz Martínez, Pedro D. ; Taravillo, M.; Baonza , Valentin G.
Palabras clave molecular conformation
Fatty acids
Raman spectroscopy
High pressure processing
Food components
Fecha de publicación 2014
EditorTaylor & Francis
Citación High Pressure Research 34: 428- 433 (2014)
ResumenThe objective of this study is to investigate the effects of high pressure processing on the molecular structure of some unsaturated fatty acids. Samples of elaidic acid, linoleic acid, ZE and EE conjugated linoleic acid are treated at 293 or 333 K at pressures up to 700 MPa. It is observed that the adiabatic heat generated from compression is able to bring the sample temperature above 373 K after 700 MPa. These relatively extreme conditions are of great interest for food sterilization, but they may induce undesirable change in fatty acid quality characteristics. To check for structural changes, Raman spectra of the samples are analysed after treatments. The comparison with Raman spectra of samples kept at atmospheric pressure shows that pressure induces some conformational changes at the hydrocarbon skeleton in solid samples, while the liquid ones remain unchanged. No cis/trans isomerization occurs, but gauche conformers are likely to be present.
URI http://hdl.handle.net/10261/112390
DOI10.1080/08957959.2014.970187
Identificadoresdoi: 10.1080/08957959.2014.970187
issn: 0895-7959
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