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Yajun Liu - One of the best experts on this subject based on the ideXlab platform.
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the contact rule and zero Phase fraction features for sm xi and t xi multicomponent Phase Diagrams
Thermochimica Acta, 2013Co-Authors: Yajun LiuAbstract:Abstract Phase diagram topologies depict how Phase regions and Phase boundaries constitute Phase Diagrams. For multicomponent systems, the relations for Phase regions and Phase boundaries can be well understood by the contact rule. However, the contact rule and zero-Phase-fraction features have inherent relations that make the interpretation of this rule more naturally. In this work, the mutual relations and underlying disciplines between the contact rule and zero-Phase-fraction features for S m − x i and T − x i multicomponent Phase Diagrams have been extensively explored, the results of which contribute to an in-depth understanding of Phase diagram topologies that are indispensable for novel materials design.
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an alternative way to derive the contact rule and Phase boundary rules for t xi multicomponent Phase Diagrams
Scripta Materialia, 2010Co-Authors: Yajun Liu, Lijun ZhangAbstract:In order to predict the Phase boundary dimension between two Phase regions, Palatnik and Landau put forward the contact rule. Later, Zhao proposed Phase boundary rules for T - x i multicomponent Phase Diagrams. In this study, the contact rule and Phase boundary rules for T - x i multicomponent Phase Diagrams are derived from a geometric point of view, which contributes to a comprehensive understanding of the topological relations. The proposed formulas in this work differ slightly from those of Zhao, but can account for more geometric relations.
Derek Marsh - One of the best experts on this subject based on the ideXlab platform.
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liquid ordered Phases induced by cholesterol a compendium of binary Phase Diagrams
Biochimica et Biophysica Acta, 2010Co-Authors: Derek MarshAbstract:Abstract Mixtures of phospholipids with cholesterol are able to form liquid-ordered Phases that are characterised by short-range orientational order and long-range translational disorder. These L o -Phases are distinct from the liquid-disordered, fluid L α -Phases and the solid-ordered, gel L β -Phases that are assumed by the phospholipids alone. The liquid-ordered Phase can produce spatially separated in-plane fluid domains, which, in the form of lipid rafts, are thought to act as platforms for signalling and membrane sorting in cells. The areas of domain formation are defined by the regions of Phase coexistence in the Phase Diagrams for the binary mixtures of lipid with cholesterol. In this paper, the available binary Phase Diagrams of lipid–cholesterol mixtures are all collected together. It is found that there is not complete agreement between different determinations of the Phase Diagrams for the same binary mixture. This can be attributed to the indirect methods largely used to establish the Phase boundaries. Intercomparison of the various data sets allows critical assessment of which Phase boundaries are rigorously established from direct evidence for Phase coexistence.
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liquid ordered Phases induced by cholesterol a compendium of binary Phase Diagrams
Biochimica et Biophysica Acta, 2010Co-Authors: Derek MarshAbstract:Mixtures of phospholipids with cholesterol are able to form liquid-ordered Phases that are characterised by short-range orientational order and long-range translational disorder. These L(o)-Phases are distinct from the liquid-disordered, fluid L(alpha)-Phases and the solid-ordered, gel L(beta)-Phases that are assumed by the phospholipids alone. The liquid-ordered Phase can produce spatially separated in-plane fluid domains, which, in the form of lipid rafts, are thought to act as platforms for signalling and membrane sorting in cells. The areas of domain formation are defined by the regions of Phase coexistence in the Phase Diagrams for the binary mixtures of lipid with cholesterol. In this paper, the available binary Phase Diagrams of lipid-cholesterol mixtures are all collected together. It is found that there is not complete agreement between different determinations of the Phase Diagrams for the same binary mixture. This can be attributed to the indirect methods largely used to establish the Phase boundaries. Intercomparison of the various data sets allows critical assessment of which Phase boundaries are rigorously established from direct evidence for Phase coexistence.
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cholesterol induced fluid membrane domains a compendium of lipid raft ternary Phase Diagrams
Biochimica et Biophysica Acta, 2009Co-Authors: Derek MarshAbstract:The biophysical underpinning of the lipid-raft concept in cellular membranes is the liquid-ordered Phase that is induced by moderately high concentrations of cholesterol. Although the crucial feature is the coexistence of Phase-separated fluid domains, direct evidence for this in mixtures of cholesterol with a single lipid is extremely sparse. More extensive evidence comes from ternary mixtures of a high chain-melting lipid and a low chain-melting lipid with cholesterol, including those containing sphingomyelin that are taken to be a raft paradigm. There is, however, not complete agreement between the various Phase Diagrams and their interpretation. In this review, the different ternary Phase Diagrams of cholesterol-containing systems are presented in a uniform way, using simple x,y-coordinates to increase accessibility for the non-specialist. It is then possible to appreciate the common features and examine critically the discrepancies and hence what direct biophysical evidence there is that supports the raft concept.
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Phase Diagrams of lipid mixtures relevant to the study of membrane rafts
Biochimica et Biophysica Acta, 2008Co-Authors: Felix M Goni, Derek Marsh, Alicia Alonso, Luis A Bagatolli, Rhoderick E Brown, Manuel Prieto, Jenifer ThewaltAbstract:The present paper reviews the Phase properties of phosphatidylcholine-sphingomyelin-cholesterol mixtures, that are often used as models for membrane "raft" microdomains. The available data based on X-ray, microscopic and spectroscopic observations, surface pressure and calorimetric measurements, and detergent solubilization assays, are critically evaluated and rationalized in terms of triangular Phase Diagrams. The remaining uncertainties are discussed specifically and separately from the data on which a consensus appears to exist.
Antonio J A Meirelles - One of the best experts on this subject based on the ideXlab platform.
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on the solid liquid Phase Diagrams of binary mixtures of even saturated fatty alcohols systems exhibiting peritectic reaction
Thermochimica Acta, 2014Co-Authors: Natalia D D Carareto, Mariana C Costa, Marlus P Rolemberg, Adenilson Dos O Santos, L P Cardoso, Antonio J A MeirellesAbstract:Abstract The solid–liquid Phase Diagrams of the following binary mixtures of even saturated fatty alcohols are reported in the literature for the first time: 1-octanol (C8OH) + 1-decanol (C10OH), 1-decanol + 1-dodecanol (C12OH), 1-dodecanol + 1-hexadecanol (C16OH) and 1-tetradecanol (C14OH) + 1-octadecanol (C18OH). The Phase Diagrams were obtained by differential scanning calorimetry (DSC) using a linear heating rate of 1 K min−1 and further investigated by using a stepscan DSC method. X-ray diffraction (XRD) and polarized light microscopy were also used to complement the characterization of the Phase Diagrams which have shown a complex global behavior, presenting not only peritectic and eutectic reactions, but also the metatectic reaction and partial immiscibility on solid state.
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the solid liquid Phase Diagrams of binary mixtures of consecutive even saturated fatty acids
Chemistry and Physics of Lipids, 2009Co-Authors: Mariana C Costa, Mariana Sardo, Marlus P Rolemberg, Joao A P Coutinho, Antonio J A Meirelles, Paulo J A Ribeiroclaro, Maria A KrahenbuhlAbstract:For the first time, the solid-liquid Phase Diagrams of five binary mixtures of saturated fatty acids are here presented. These mixtures are formed of caprylic acid (C(8:0))+capric acid (C(10:0)), capric acid (C(10:0))+lauric acid (C(12:0)), lauric acid (C(12:0))+myristic acid (C(14:0)), myristic acid (C(14:0))+palmitic acid (C(16:0)) and palmitic acid (C(16:0))+stearic acid (C(18:0)). The information used in these Phase Diagrams was obtained by differential scanning calorimetry (DSC), X-ray diffraction (XRD), FT-Raman spectrometry and polarized light microscopy, aiming at a complete understanding of the Phase Diagrams of the fatty acid mixtures. All of the Phase Diagrams reported here presented the same global behavior and it was shown that this was far more complex than previously imagined. They presented not only peritectic and eutectic reactions, but also metatectic reactions, due to solid-solid Phase transitions common in fatty acids and regions of solid solution not previously reported. This work contributes to the elucidation of the Phase behavior of these important biochemical molecules, with implications in various industrial applications.
Marlus P Rolemberg - One of the best experts on this subject based on the ideXlab platform.
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The solid-liquid Phase Diagrams of binary mixtures of even saturated fatty alcohols
'Elsevier BV', 2015Co-Authors: Carareto Ndd, Marlus P Rolemberg, Mc Costa, Meirelles AjaAbstract:This study is part of a work developed in the author's research group on the solid-liquid equilibrium of fatty substances. The Phase Diagrams of the following fatty alcohol systems were determined by differential scanning calorimetry (DSC): 1-octanol + 1-dodecanol, 1-octanol + 1-tetradecanol, 1-decanol + 1-tetradecanol, 1-decanol + 1-hexadecanol and 1-dodecanol + 1-octadecanol. The liquidus lines of three of these systems were previously reported in the literature but the other two systems were never published. Moreover other transitions, in addition to the eutectic temperature, were also detected in all the systems. A region of solid solution at the extreme left of the Phase Diagrams was observed for all the binary mixtures. Polarized light microscopy was used to complement the characterization of the systems for a full grasp of the Phase Diagrams. The solid-liquid equilibrium was modeled using the Margules 2-suffix, Margules 3-suffix, NRTL and UNIFAC Dortmund equations. (c) 2011 Elsevier B.V. All rights reserved.303219119
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on the solid liquid Phase Diagrams of binary mixtures of even saturated fatty alcohols systems exhibiting peritectic reaction
Thermochimica Acta, 2014Co-Authors: Natalia D D Carareto, Mariana C Costa, Marlus P Rolemberg, Adenilson Dos O Santos, L P Cardoso, Antonio J A MeirellesAbstract:Abstract The solid–liquid Phase Diagrams of the following binary mixtures of even saturated fatty alcohols are reported in the literature for the first time: 1-octanol (C8OH) + 1-decanol (C10OH), 1-decanol + 1-dodecanol (C12OH), 1-dodecanol + 1-hexadecanol (C16OH) and 1-tetradecanol (C14OH) + 1-octadecanol (C18OH). The Phase Diagrams were obtained by differential scanning calorimetry (DSC) using a linear heating rate of 1 K min−1 and further investigated by using a stepscan DSC method. X-ray diffraction (XRD) and polarized light microscopy were also used to complement the characterization of the Phase Diagrams which have shown a complex global behavior, presenting not only peritectic and eutectic reactions, but also the metatectic reaction and partial immiscibility on solid state.
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the solid liquid Phase Diagrams of binary mixtures of consecutive even saturated fatty acids
Chemistry and Physics of Lipids, 2009Co-Authors: Mariana C Costa, Mariana Sardo, Marlus P Rolemberg, Joao A P Coutinho, Antonio J A Meirelles, Paulo J A Ribeiroclaro, Maria A KrahenbuhlAbstract:For the first time, the solid-liquid Phase Diagrams of five binary mixtures of saturated fatty acids are here presented. These mixtures are formed of caprylic acid (C(8:0))+capric acid (C(10:0)), capric acid (C(10:0))+lauric acid (C(12:0)), lauric acid (C(12:0))+myristic acid (C(14:0)), myristic acid (C(14:0))+palmitic acid (C(16:0)) and palmitic acid (C(16:0))+stearic acid (C(18:0)). The information used in these Phase Diagrams was obtained by differential scanning calorimetry (DSC), X-ray diffraction (XRD), FT-Raman spectrometry and polarized light microscopy, aiming at a complete understanding of the Phase Diagrams of the fatty acid mixtures. All of the Phase Diagrams reported here presented the same global behavior and it was shown that this was far more complex than previously imagined. They presented not only peritectic and eutectic reactions, but also metatectic reactions, due to solid-solid Phase transitions common in fatty acids and regions of solid solution not previously reported. This work contributes to the elucidation of the Phase behavior of these important biochemical molecules, with implications in various industrial applications.
Mariana C Costa - One of the best experts on this subject based on the ideXlab platform.
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on the solid liquid Phase Diagrams of binary mixtures of even saturated fatty alcohols systems exhibiting peritectic reaction
Thermochimica Acta, 2014Co-Authors: Natalia D D Carareto, Mariana C Costa, Marlus P Rolemberg, Adenilson Dos O Santos, L P Cardoso, Antonio J A MeirellesAbstract:Abstract The solid–liquid Phase Diagrams of the following binary mixtures of even saturated fatty alcohols are reported in the literature for the first time: 1-octanol (C8OH) + 1-decanol (C10OH), 1-decanol + 1-dodecanol (C12OH), 1-dodecanol + 1-hexadecanol (C16OH) and 1-tetradecanol (C14OH) + 1-octadecanol (C18OH). The Phase Diagrams were obtained by differential scanning calorimetry (DSC) using a linear heating rate of 1 K min−1 and further investigated by using a stepscan DSC method. X-ray diffraction (XRD) and polarized light microscopy were also used to complement the characterization of the Phase Diagrams which have shown a complex global behavior, presenting not only peritectic and eutectic reactions, but also the metatectic reaction and partial immiscibility on solid state.
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the solid liquid Phase Diagrams of binary mixtures of consecutive even saturated fatty acids
Chemistry and Physics of Lipids, 2009Co-Authors: Mariana C Costa, Mariana Sardo, Marlus P Rolemberg, Joao A P Coutinho, Antonio J A Meirelles, Paulo J A Ribeiroclaro, Maria A KrahenbuhlAbstract:For the first time, the solid-liquid Phase Diagrams of five binary mixtures of saturated fatty acids are here presented. These mixtures are formed of caprylic acid (C(8:0))+capric acid (C(10:0)), capric acid (C(10:0))+lauric acid (C(12:0)), lauric acid (C(12:0))+myristic acid (C(14:0)), myristic acid (C(14:0))+palmitic acid (C(16:0)) and palmitic acid (C(16:0))+stearic acid (C(18:0)). The information used in these Phase Diagrams was obtained by differential scanning calorimetry (DSC), X-ray diffraction (XRD), FT-Raman spectrometry and polarized light microscopy, aiming at a complete understanding of the Phase Diagrams of the fatty acid mixtures. All of the Phase Diagrams reported here presented the same global behavior and it was shown that this was far more complex than previously imagined. They presented not only peritectic and eutectic reactions, but also metatectic reactions, due to solid-solid Phase transitions common in fatty acids and regions of solid solution not previously reported. This work contributes to the elucidation of the Phase behavior of these important biochemical molecules, with implications in various industrial applications.
