Journal
FOOD CHEMISTRY
Volume 185, Issue -, Pages 268-276Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.03.141
Keywords
Salmon; Culinary treatments; Proximate composition; Fatty acid profile; Metal contaminants; Bioaccessibility
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BPD/64951/2009, PTDC/SAU-ESA/103825/2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/64951/2009, PTDC/SAU-ESA/103825/2008] Funding Source: FCT
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The effect of culinary treatments on the fatty acid profile, mercury (Hg), and methylmercury (MeHg) levels of salmon was studied. The bioaccessibility of fatty acids, Hg, and MeHg in raw and grilled salmon was determined. The most intense thermal treatment (grilling) did not alter the relative fatty acid (FA) profile. There were bioaccessibility differences between FAs. To the authors' knowledge, for the first time, higher bioaccessibility of the long-chain FAs than the short- and medium-chain FM was measured. Chemical interaction phenomena seemed to play a role. On the other hand, higher levels of unsaturation decreased bioaccessibility. Two main alternative hypotheses were put forward, either lower polarity led to higher incorporation of FAs with longer hydrophobic aliphatic chain and lower number of double bonds in the emulsion present in the bioaccessible fraction or enzymatic selectivity preferentially hydrolyzed some FAs on the basis of their structure or position in the triacylglycerol molecule. (C) 2015 Elsevier Ltd. All rights reserved.
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