8 research outputs found

    Seaweed in Health and Disease Prevention

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    Seaweed in Health and Disease Prevention presents the potential usage of seaweed, macroalgae, and their extracts for enhancing health and disease. The book explores the possibilities in a comprehensive way, including outlining how seaweed can be used as a source of macronutrients and micronutrients, as well as nutraceuticals. The commercial value of seaweed for human consumption is increasing year-over-year, and some countries harvest several million tons annually. This text lays out the properties and effects of seaweeds and their use in the food industry, offering a holistic view of the ability of seaweed to impact or effect angiogenesis, tumors, diabetes and glucose control, oxidative stress, fungal infections, inflammation and infection, the gut, and the liver. Combines foundational information and nutritional context, offering a holistic approach to the relationship between sea vegetables, diet, nutrition, and health Provides comprehensive coverage of health benefits, including sea vegetables as sources of nutraceuticals and their specific applications in disease prevention, such as angiogenesis, diabetes, fungal infections, and others Includes Dictionary of Terms, Key Facts, and Summary points in each chapter to enhance comprehension Includes information on toxic varieties and safe consumption guidelines to supplement basic coverage of health benefitshttps://digitalcommons.usm.maine.edu/facbooks/1165/thumbnail.jp

    Marine biotechnology : an overview of leading field. IXth ESMB meeting, Nantes, 12-14 May 2002

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    The IXT meeting of the European Soclety for Marine Biotechnology held on 12-14 May 2002 In Nantes was an opportunity to make assessments on marine biotechnology leading fields and meet both researchers and industrials. Communications reported here was focused on bioactive compounds from marine organisms and plants (proteins, peptides, enzymes, lipids, polysaccharides...) and their potential uses in various fields as human or animal nutrition (aquaculture, microbiology) and human health (pharmacy). A special session was dedicated to marine polysaccharides from algae and bacteria, accurate examples on their potential uses as new therapeutic agents have been displayed. The biodiversity of marine resources offers many applications in industrial field and contributes to the expansion of the marine biotechnology.Le IXe colloque de la Société européenne pour la biotechnologie marine s’est tenu du 12 au 14 mai 2002 à Nantes, il a permis de réunir en un même lieu les acteurs du monde de la recherche et ceux de l’industrie afin d’exposer et de débattre des avancées dans les principaux domaines de la biotechnologie marine. La majorité des interventions a porté sur les molécules bioactives issues d’organismes et de végétaux marins en donnant des informations sur leur nature (protéine, peptide, enzyme, lipide, polysaccharide...) et sur leurs utilisations potentielles dans des domaines aussi divers que la nutrition humaine et animale (aquaculture, microbiologie) et la santé humaine (pharmacie). Une session a même été totalement consacrée aux polysaccharides marins issus d’algues et de bactéries, des exemples précis sur leur potentiel en santé humaine ont été donnés. II ressort de ce congrès que la biodiversité des ressources marines offre de nombreux débouchés dans l’industrie et contribue à l’essor de la biotechnologie marine

    Ultrasound-assisted extraction of R-phycoerythrin from Grateloupia turuturu with and without enzyme addition

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    The aim of this study was to compare two processes for the extraction of R-phycoerythrin (R-PE) from the red seaweed Grateloupia turuturu: ultrasound-assisted extraction (UAE) and ultrasound-assisted enzymatic hydrolysis (UAEH). Process efficiencies were both evaluated by the yield of R-PE extraction and by the level of liquefaction. Experiments were conducted at 40 and 22 °C, for 6 h, using an enzymatic cocktail and an original ultrasonic flow-through reactor. R-PE appeared very sensitive to temperature, thus 22 °C is strongly recommended for its extraction by UAEH or UAE. However, the higher processing temperature (40 °C) clearly increased the extraction of water-soluble compounds (up to 91% of liquefaction). These two new processes are thus promising alternatives for the extraction of water-soluble components including R-PE, from wet seaweeds, with extraction yields at least similar to conventional solid–liquid extraction

    Antioxidant and free radical scavenging properties of marennine, a blue-green polyphenolic pigment from the diatom Haslea ostrearia (Gaillon/Bory) simonsen responsible for the natural greening of cultured oysters

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    International audienceAmong microalgae, the marine diatom Haslea ostrearia has the distinctive feature of synthesizing and releasing, into the surrounding environment, a blue-green polyphenolic pigment called marennine. The oyster-breeding industry commonly makes use of this natural phenomenon for the greening of oysters grown in the ponds of the French Atlantic coast. This article reports the in vitro antioxidant properties of pure marennine. Two kinds of evaluation systems were adopted to test the antioxidative activity of marennine: antioxidant capacity assays (β-carotene and thymidine protection assays and iron reducing power assay) and free radical scavenging assays (DPPH·, O2·-, and HO·). In almost all cases, marennine exhibited significantly higher antioxidative and free radical scavenging activities than natural and synthetic antioxidants commonly used in food, as shown by comparing median effective concn. (EC50) values, for each test independently. This medium mol. wt. polyphenol (around 10 kDa) from microalgae is thus a potentially useful natural antioxidant. Because of its blue-coloring property and water soly., it could also be used as a natural food-coloring additive. [on SciFinder(R)

    Soft liquefaction of the red seaweed Grateloupia turuturu Yamada by ultrasound-assisted enzymatic hydrolysis process

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    Ultrasound-assisted enzymatic hydrolysis is a recent process, increasingly employed for plant biomass liquefaction and the recovery of soluble biomolecules. However, to our knowledge, it has never been used on seaweeds, particularly wet ones. The aim of this study was to compare the efficiency of three processes on the liquefaction of the red seaweed Grateloupia turuturu Yamada: enzyme-assisted extraction (EAE), ultrasound-assisted extraction (UAE), and their combination, ultrasound-assisted enzymatic hydrolysis (UAEH). These comparisons will allow the identification as to which process achieves the highest extraction yield of water-soluble compounds. For this purpose, experiments were conducted at 40 °C for 6 h using an enzymatic cocktail of four industrial carbohydrases and an original ultrasonic flow-through reactor. After 6 h, similar profiles were observed between EAE and UAE with the recovery of 71–74 % of the initial material into the soluble phase. However, when these processes were combined, up to 91 % solubilized material was observed in the same time, with a synergistic effect after 2 h. From a biochemical point of view, UAEH improved the extraction of nitrogen and carbon compounds and, more precisely, carbohydrates and amino acids. This study demonstrates that ultrasound improved the enzymatic hydrolysis, probably by an increase in the mass transfer and a disruption of the thallus due to the implosion of the cavitation bubbles generated. UAEH is clearly an efficient procedure for the liquefaction of wet seaweeds, enabling the recovery of valuable components