Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols
This work reports on the production and characterization of agar-based extracts from the seaweed Gelidium sesquipedale by means of simple protocols based on hot water and sonication treatments. The combination of sonication with the hot water treatment reduced 4-fold the extraction time without significantly affecting the extraction yield (ca. 10–12%) and the extracts' properties. Apart from agar, the extracts contained proteins, polyphenols and minerals, which conferred them high antioxidant capacity and led to the production of brownish softer gels. The application of an alkali pre-treatment yielded almost pure agars, with higher molecular weights and crystallinities than commercial agar, resulting in stiffer gels. However, the partial digestion of agar by the alkali led to low extraction yields (ca. 2–3%). These results show the efficiency of the combined heat and sonication method to generate cost-effective agar-based extracts with potential applications within the food industry.
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2019-01-15
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Subjects: | Red seaweed, Gels, Sulphated polysaccharides, Ultrasound-assisted extraction, Food hydrocolloid, |
Online Access: | http://hdl.handle.net/10261/177603 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
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dig-iata-es-10261-1776032022-12-20T16:50:57Z Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols Martínez Sanz, Marta Gómez-Mascaraque, Laura G. Ballester Frutos, Ana Rosa Martínez Abad, Antonio Brodkorb, André López-Rubio, Amparo European Commission Ministerio de Economía y Competitividad (España) Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid This work reports on the production and characterization of agar-based extracts from the seaweed Gelidium sesquipedale by means of simple protocols based on hot water and sonication treatments. The combination of sonication with the hot water treatment reduced 4-fold the extraction time without significantly affecting the extraction yield (ca. 10–12%) and the extracts' properties. Apart from agar, the extracts contained proteins, polyphenols and minerals, which conferred them high antioxidant capacity and led to the production of brownish softer gels. The application of an alkali pre-treatment yielded almost pure agars, with higher molecular weights and crystallinities than commercial agar, resulting in stiffer gels. However, the partial digestion of agar by the alkali led to low extraction yields (ca. 2–3%). These results show the efficiency of the combined heat and sonication method to generate cost-effective agar-based extracts with potential applications within the food industry. This work was financially supported by the “Agencia Estatal de Investigación” and co-funded by the European Union's Horizon 2020 research and innovation programme (ERA-Net SUSFOOD2). Marta Martinez-Sanz is recipient of a Juan de la Cierva (IJCI-2015-23389) contract from the Spanish Ministry of Economy, Industry and Competitiveness. Peer reviewed 2019-03-11T08:57:33Z 2019-03-11T08:57:33Z 2019-01-15 artículo http://purl.org/coar/resource_type/c_6501 Algal Research March 2019; 38: 101420 2211-9264 http://hdl.handle.net/10261/177603 10.1016/j.algal.2019.101420 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 en Postprint https://doi.org/10.1016/j.algal.2019.101420 Sí open Elsevier |
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Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid |
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Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid Martínez Sanz, Marta Gómez-Mascaraque, Laura G. Ballester Frutos, Ana Rosa Martínez Abad, Antonio Brodkorb, André López-Rubio, Amparo Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
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This work reports on the production and characterization of agar-based extracts from the seaweed Gelidium sesquipedale by means of simple protocols based on hot water and sonication treatments. The combination of sonication with the hot water treatment reduced 4-fold the extraction time without significantly affecting the extraction yield (ca. 10–12%) and the extracts' properties. Apart from agar, the extracts contained proteins, polyphenols and minerals, which conferred them high antioxidant capacity and led to the production of brownish softer gels. The application of an alkali pre-treatment yielded almost pure agars, with higher molecular weights and crystallinities than commercial agar, resulting in stiffer gels. However, the partial digestion of agar by the alkali led to low extraction yields (ca. 2–3%).
These results show the efficiency of the combined heat and sonication method to generate cost-effective agar-based extracts with potential applications within the food industry. |
author2 |
European Commission |
author_facet |
European Commission Martínez Sanz, Marta Gómez-Mascaraque, Laura G. Ballester Frutos, Ana Rosa Martínez Abad, Antonio Brodkorb, André López-Rubio, Amparo |
format |
artículo |
topic_facet |
Red seaweed Gels Sulphated polysaccharides Ultrasound-assisted extraction Food hydrocolloid |
author |
Martínez Sanz, Marta Gómez-Mascaraque, Laura G. Ballester Frutos, Ana Rosa Martínez Abad, Antonio Brodkorb, André López-Rubio, Amparo |
author_sort |
Martínez Sanz, Marta |
title |
Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
title_short |
Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
title_full |
Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
title_fullStr |
Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
title_full_unstemmed |
Production of unpurified agar-based extracts from red seaweed Gelidium sesquipedale by means of simplified extraction protocols |
title_sort |
production of unpurified agar-based extracts from red seaweed gelidium sesquipedale by means of simplified extraction protocols |
publisher |
Elsevier |
publishDate |
2019-01-15 |
url |
http://hdl.handle.net/10261/177603 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 |
work_keys_str_mv |
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