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Le Guillard, Cecile; Dumay, Justine; Donnay-moreno, Claire; Bruzac, Sandrine; Ragon, Jean-yves; Fleurence, Joel; Berge, Jean-pascal. |
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... |
Tipo: Text |
Palavras-chave: Seaweed; Grateloupia turuturu; R-phycoerythrin; Ultrasound-assisted extraction; Ultrasound-assisted enzymatic hydrolysis; Liquefaction. |
Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00292/40332/39993.pdf |
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Perez-galvez, Raul; Chopin, Christine; Mastail, Max; Ragon, Jean-yves; Guadix, Antonio; Berge, Jean-pascal. |
Fresh sardine (employed as discard model species) was pressed with a hydraulic press in order to obtain a partially dewatered cake (whose volume represents between 55% and 60% of the initial Volume of raw material) and a 3-phase press liquor comprising an aqueous fraction, an oil fraction and a variable amount of suspended solids. Pressing conditions, such as final pressure to which the sardine was subjected, compression speed, number of pressing stages and time of relaxation between two consecutive pressing stages, were optimised by means of a statistically designed experiment. The goal of the optimisation problem was to achieve maximal yield of press liquor with a minimum load of suspended solids. The Suspended solid content in the press liquor Must be... |
Tipo: Text |
Palavras-chave: Multiobjective optimisation; Response surface methodology; Hydraulic pressing; Fish discards; Sardine. |
Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7415.pdf |
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Le Guillard, Cecile; Berge, Jean-pascal; Donnay-moreno, Claire; Bruzac, Sandrine; Ragon, Jean-yves; Baron, Regis; Fleurence, Joel; Dumay, Justine. |
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... |
Tipo: Text |
Palavras-chave: Ultrasound-assisted enzymatic hydrolysis; Enzymatic hydrolysis; Ultrasound; Liquefaction; Algae; Grateloupia turuturu. |
Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00308/41877/44316.pdf |
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