The Experts below are selected from a list of 1197606 Experts worldwide ranked by ideXlab platform
Marie De Lamballerie - One of the best experts on this subject based on the ideXlab platform.
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New Insights into the High-Pressure Processing of Meat and Meat Products
Comprehensive Reviews in Food Science and Food Safety, 2012Co-Authors: Hélène Simonin, Frédérique Duranton, Marie De LamballerieAbstract:Abstract: For years, High-Pressure processing has been viewed as useful for pasteurizing food while maintaining the quality of fresh food. However, even at moderate Pressure, this process is not without effects on food, especially on meat products. These effects are especially important because Pressure greater than 400 MPa is generally necessary to achieve efficient microbial inactivation. In this review, recent advances in the understanding of the impacts of High Pressure on the overall quality of raw and processed meat are discussed. Many factors, including meat product formulation and processing parameters, can influence the efficiency of High Pressure in pasteurizing meat products. It appears that new strategies are applied either (i) to improve the microbial inactivation that results from High Pressure while minimizing the adverse effects of High Pressure on meat quality or (ii) to take advantage of changes in meat attributes under High Pressure. Most of the time, multiple preservation factors or techniques are combined to produce safe, stable, and High-quality food products. Among the new applications of High-Pressure techniques for meat and meat-derivative products are their use in combination with temperature manipulation to texturize and pasteurize new meat products simultaneously.
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effect of High Pressure treatment on emulsifying properties of soybean proteins
Food Hydrocolloids, 2005Co-Authors: Maria Cecilia Puppo, Nathalie Chapleau, Marie De Lamballerie, Francisco Speroni, Maria Cristina Anon, Marc AntonAbstract:Abstract Modifications of emulsifying properties of soybean protein isolates (SPI) by High-Pressure processing have been studied. SPI solutions at 10 g/l in two pH conditions: alkaline (pH 8: SPI8) and acidic (pH 3: SPI3) were treated by High-Pressure at various Pressure levels (200, 400 and 600 MPa for 10 min at 10 °C). Oil-in-water emulsions (30/70) were prepared with untreated and High-Pressure treated SPI3 and SPI8. Emulsifying properties (oil droplet size, flocculation, interfacial protein concentration and composition) were evaluated. Pressure processing of SPI8 from 200 MPa induced a reduction of droplet size and an increase of depletion flocculation, not observed with SPI3. Bridging flocculation decreased and percentage of adsorbed proteins increased when Pressure was applied, whatever the pH conditions. High-Pressure treatment induced more ability to proteins, and particularly β-7S and A-11S polypeptides, to be adsorbed at the oil–water interface. At pH 3, High-Pressure processing seemed to improve emulsifying properties that have declined due to acidification.
Jian Yang - One of the best experts on this subject based on the ideXlab platform.
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development of High Pressure gaseous hydrogen storage technologies
International Journal of Hydrogen Energy, 2012Co-Authors: Jinyang Zheng, Yongzhi Zhao, Ping Xu, Jian YangAbstract:Abstract Economic, efficient and safe hydrogen storage is the key to hydrogen economy. High Pressure gaseous hydrogen storage offers the simplest solution in terms of infrastructure requirements and has become the most popular and Highly developed method. There are three types of High Pressure gaseous hydrogen storage vessel, namely: stationary, vehicular, and bulk transportation. First, recent progress toward low-cost, large capacity and light-weight on High Pressure gaseous hydrogen storage vessels is reviewed. Then, three important aspects of High Pressure gaseous hydrogen safety, i.e., hydrogen embrittlement of metals at room temperature, temperature rise in hydrogen fast filling, and potential risks such as diffusion, deflagration, and detonation after hydrogen leakage are introduced. A concise overview of the development on code and standard for High Pressure hydrogen storage is also presented. Finally, some suggestions on the further research are proposed.
Shigeaki Ono - One of the best experts on this subject based on the ideXlab platform.
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High Pressure phase transition of hematite fe2o3
Journal of Physics and Chemistry of Solids, 2004Co-Authors: Shigeaki Ono, Takumi Kikegawa, Yasuo OhishiAbstract:Structural phase transitions of iron oxide (Fe2O3) have been investigated at Pressures up to 70 GPa and temperatures above 2500 K, using a laser-heated diamond anvil cell technique. A phase transition between α-Fe2O3 (hematite) and perovskite-type Fe2O3 was observed at about 30 GPa. At Pressures Higher than 50 GPa, we also observed the occurrence of a new High-Pressure phase of Fe2O3. Diffraction peaks of the new High-Pressure phase can be indexed on the basis of orthorhombic or monoclinic symmetries that are denser than other known Fe2O3 phases. The volume change from perovskite-type to the new High-Pressure phase is about 7%.
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structural refinements of High Pressure phases in germanium dioxide
Acta Crystallographica Section B-structural Science, 2003Co-Authors: Koichi Shiraki, Taku Tsuchiya, Shigeaki OnoAbstract:Recently, there has been substantial interest in the new High-Pressure polymorphs of GeO2 synthesized in the laboratory. Previous investigators reported the synthesis of `CaCl2-type', `α-PbO2-type' and `pyrite-type (modified-fluorite-type)' GeO2 at Pressures of 30–130 GPa in laser-heated diamond anvil cells. In order to provide definitive information about the new High-Pressure polymorphs, we performed Rietveld refinements of the structures. The structure refinements confirm that two of these High-Pressure phases do have the α-PbO2-type and pyrite-type (modified-fluorite-type) structures.
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High Pressure form of pyrite type germanium dioxide
Physical Review B, 2003Co-Authors: Shigeaki Ono, Taku Tsuchiya, Kei Hirose, Yasuo OhishiAbstract:Structural phase transitions of germanium dioxide $({\mathrm{GeO}}_{2})$ have been investigated at Pressures up to 120 GPa, which was heated to a temperature above 2000 K, using a laser-heated diamond anvil cell technique. A phase transition between ${\mathrm{CaCl}}_{2}$-type and $\ensuremath{\alpha}\ensuremath{-}{\mathrm{PbO}}_{2}$-type phases was observed at about 50 GPa. At Pressures Higher than 90 GPa, we also observed the occurrence of a new High-Pressure phase of pyrite-type (modified-fluorite type) structure $(Pa3\ifmmode\bar\else\textasciimacron\fi{})$ that is denser than other known ${\mathrm{GeO}}_{2}$ phases. Our results were consistent with the High-Pressure transition sequence of tin dioxide $({\mathrm{SnO}}_{2})$ as analog of ${\mathrm{GeO}}_{2}.$ The new structure of the ${\mathrm{GeO}}_{2}$ High-Pressure phase may be that of High-Pressure silica $({\mathrm{SiO}}_{2})$ phase predicted by the theoretical investigations.
Jinyang Zheng - One of the best experts on this subject based on the ideXlab platform.
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development of High Pressure gaseous hydrogen storage technologies
International Journal of Hydrogen Energy, 2012Co-Authors: Jinyang Zheng, Yongzhi Zhao, Ping Xu, Jian YangAbstract:Abstract Economic, efficient and safe hydrogen storage is the key to hydrogen economy. High Pressure gaseous hydrogen storage offers the simplest solution in terms of infrastructure requirements and has become the most popular and Highly developed method. There are three types of High Pressure gaseous hydrogen storage vessel, namely: stationary, vehicular, and bulk transportation. First, recent progress toward low-cost, large capacity and light-weight on High Pressure gaseous hydrogen storage vessels is reviewed. Then, three important aspects of High Pressure gaseous hydrogen safety, i.e., hydrogen embrittlement of metals at room temperature, temperature rise in hydrogen fast filling, and potential risks such as diffusion, deflagration, and detonation after hydrogen leakage are introduced. A concise overview of the development on code and standard for High Pressure hydrogen storage is also presented. Finally, some suggestions on the further research are proposed.
Claire Blayo - One of the best experts on this subject based on the ideXlab platform.
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Technological aspects and potential applications of (ultra) High-Pressure homogenisation
Trends in Food Science & Technology, 2013Co-Authors: E. Dumay, Dominique Chevalier-lucia, Laetitia Picart-palmade, Amal Benzaria, Alvar Gràcia-julià, Claire BlayoAbstract:The present review concerns homogenisation processing, and more particularly High-Pressure homogenisation. Recent developments in High-Pressure technology and the design of new homogenisation valves able to withstand Pressures up to 350–400 MPa have indeed opened new opportunities to homogenisation processing in the dairy, pharmaceutical and cosmetic industries. Homogenisers equipped with High-Pressure valves or interaction chambers of different designs, and consequently different flow characteristics (laminar or turbulent flow, cavitation, impingement on solid walls, fluid jet collision) are available. The present review will more particularly concern piston-gap type High-Pressure homogenisers equipped with specially designed HP-valves able to reach 300–400 MPa for ultra-High-Pressure homogenisation (UHPH). An overview of some recent UHPH studies will be summarised in the following sections including UHPH-induced microbial inactivation, characteristics of submicron emulsions and UHPH-induced protein structural changes and functionality.
