Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products
Salmon processing commonly involves the skinning of fish, generating by-products that need to be handled. Such skin residues may represent valuable raw materials from a valorization perspective, mainly due to their collagen content. With this approach, we propose in the present work the extraction o...
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ftmdpi:oai:mdpi.com:/2073-4360/13/16/2828/ 2023-08-20T04:09:31+02:00 Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products José Antonio Vázquez Carolina Hermida-Merino Daniel Hermida-Merino Manuel M. Piñeiro Johan Johansen Carmen G. Sotelo Ricardo I. Pérez-Martín Jesus Valcarcel 2021-08-23 application/pdf https://doi.org/10.3390/polym13162828 EN eng Multidisciplinary Digital Publishing Institute Biomacromolecules, Biobased and Biodegradable Polymers https://dx.doi.org/10.3390/polym13162828 https://creativecommons.org/licenses/by/4.0/ Polymers; Volume 13; Issue 16; Pages: 2828 salmon ( Salmo salar ) gelatin valorization aquaculture by-products gel strength rheological properties protein hydrolysates absolute molecular weight Text 2021 ftmdpi https://doi.org/10.3390/polym13162828 2023-08-01T02:30:18Z Salmon processing commonly involves the skinning of fish, generating by-products that need to be handled. Such skin residues may represent valuable raw materials from a valorization perspective, mainly due to their collagen content. With this approach, we propose in the present work the extraction of gelatin from farmed salmon and further valorization of the remaining residue through hydrolysis. Use of different chemical treatments prior to thermal extraction of gelatin results in a consistent yield of around 5%, but considerable differences in rheological properties. As expected from a cold-water species, salmon gelatin produces rather weak gels, ranging from 0 to 98 g Bloom. Nevertheless, the best performing gelatins show considerable structural integrity, assessed by gel permeation chromatography with light scattering detection for the first time on salmon gelatin. Finally, proteolysis of skin residues with Alcalase for 4 h maximizes digestibility and antihypertensive activity of the resulting hydrolysates, accompanied by the sharpest reduction in molecular weight and higher content of essential amino acids. These results indicate the possibility of tuning salmon gelatin properties through changes in chemical treatment conditions, and completing the valorization cycle through production of bioactive and nutritious hydrolysates. Text Salmo salar MDPI Open Access Publishing Polymers 13 16 2828 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
salmon ( Salmo salar ) gelatin valorization aquaculture by-products gel strength rheological properties protein hydrolysates absolute molecular weight |
spellingShingle |
salmon ( Salmo salar ) gelatin valorization aquaculture by-products gel strength rheological properties protein hydrolysates absolute molecular weight José Antonio Vázquez Carolina Hermida-Merino Daniel Hermida-Merino Manuel M. Piñeiro Johan Johansen Carmen G. Sotelo Ricardo I. Pérez-Martín Jesus Valcarcel Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
topic_facet |
salmon ( Salmo salar ) gelatin valorization aquaculture by-products gel strength rheological properties protein hydrolysates absolute molecular weight |
description |
Salmon processing commonly involves the skinning of fish, generating by-products that need to be handled. Such skin residues may represent valuable raw materials from a valorization perspective, mainly due to their collagen content. With this approach, we propose in the present work the extraction of gelatin from farmed salmon and further valorization of the remaining residue through hydrolysis. Use of different chemical treatments prior to thermal extraction of gelatin results in a consistent yield of around 5%, but considerable differences in rheological properties. As expected from a cold-water species, salmon gelatin produces rather weak gels, ranging from 0 to 98 g Bloom. Nevertheless, the best performing gelatins show considerable structural integrity, assessed by gel permeation chromatography with light scattering detection for the first time on salmon gelatin. Finally, proteolysis of skin residues with Alcalase for 4 h maximizes digestibility and antihypertensive activity of the resulting hydrolysates, accompanied by the sharpest reduction in molecular weight and higher content of essential amino acids. These results indicate the possibility of tuning salmon gelatin properties through changes in chemical treatment conditions, and completing the valorization cycle through production of bioactive and nutritious hydrolysates. |
format |
Text |
author |
José Antonio Vázquez Carolina Hermida-Merino Daniel Hermida-Merino Manuel M. Piñeiro Johan Johansen Carmen G. Sotelo Ricardo I. Pérez-Martín Jesus Valcarcel |
author_facet |
José Antonio Vázquez Carolina Hermida-Merino Daniel Hermida-Merino Manuel M. Piñeiro Johan Johansen Carmen G. Sotelo Ricardo I. Pérez-Martín Jesus Valcarcel |
author_sort |
José Antonio Vázquez |
title |
Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
title_short |
Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
title_full |
Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
title_fullStr |
Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
title_full_unstemmed |
Characterization of Gelatin and Hydrolysates from Valorization of Farmed Salmon Skin By-Products |
title_sort |
characterization of gelatin and hydrolysates from valorization of farmed salmon skin by-products |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/polym13162828 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
Polymers; Volume 13; Issue 16; Pages: 2828 |
op_relation |
Biomacromolecules, Biobased and Biodegradable Polymers https://dx.doi.org/10.3390/polym13162828 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/polym13162828 |
container_title |
Polymers |
container_volume |
13 |
container_issue |
16 |
container_start_page |
2828 |
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1774722525908959232 |