The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
M. S. Rahman - One of the best experts on this subject based on the ideXlab platform.
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Evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon-Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models' (GAB and Gordon-Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tgis required to establish a sound processing and storage stability criteria. © 2005 Elsevier Ltd. All rights reserved.
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evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon–Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models’ (GAB and Gordon–Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tg is required to establish a sound processing and storage stability criteria.
Shyam S. Sablani - One of the best experts on this subject based on the ideXlab platform.
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Evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon-Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models' (GAB and Gordon-Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tgis required to establish a sound processing and storage stability criteria. © 2005 Elsevier Ltd. All rights reserved.
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evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon–Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models’ (GAB and Gordon–Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tg is required to establish a sound processing and storage stability criteria.
Eric R. Weeks - One of the best experts on this subject based on the ideXlab platform.
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Introduction to the Colloidal Glass Transition
ACS Macro Letters, 2016Co-Authors: Eric R. WeeksAbstract:Colloids are suspensions of small solid particles in a liquid and exhibit Glassy behavior when the particle concentration is high. In these samples, the particles are roughly analogous to individual molecules in a traditional Glass. This model system has been used to study the Glass Transition since the 1980s. In this Viewpoint I summarize some of the intriguing behaviors of the Glass Transition in colloids and discuss open questions.
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the physics of the colloidal Glass Transition
Reports on Progress in Physics, 2012Co-Authors: Gary L. Hunter, Eric R. WeeksAbstract:As one increases the concentration of a colloidal suspension, the system exhibits a dramatic increase in viscosity. Beyond a certain concentration, the system is said to be a colloidal Glass; structurally, the system resembles a liquid, yet motions within the suspension are slow enough that it can be considered essentially frozen. For several decades, colloids have served as a valuable model system for understanding the Glass Transition in molecular systems. The spatial and temporal scales involved allow these systems to be studied by a wide variety of experimental techniques. The focus of this review is the current state of understanding of the colloidal Glass Transition, with an emphasis on experimental observations. A brief introduction is given to important experimental techniques used to study the Glass Transition in colloids. We describe features of colloidal systems near and in Glassy states, including increases in viscosity and relaxation times, dynamical heterogeneity and ageing, among others. We also compare and contrast the Glass Transition in colloids to that in molecular liquids. Other Glassy systems are briefly discussed, as well as recently developed synthesis techniques that will keep these systems rich with interesting physics for years to come.
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The physics of the colloidal Glass Transition
Reports on Progress in Physics, 2012Co-Authors: Gary L. Hunter, Eric R. WeeksAbstract:As one increases the concentration of a colloidal suspension, the system exhibits a dramatic increase in viscosity. Structurally, the system resembles a liquid, yet motions within the suspension are slow enough that it can be considered essentially frozen. This kinetic arrest is the colloidal Glass Transition. For several decades, colloids have served as a valuable model system for understanding the Glass Transition in molecular systems. The spatial and temporal scales involved allow these systems to be studied by a wide variety of experimental techniques. The focus of this review is the current state of understanding of the colloidal Glass Transition. A brief introduction is given to important experimental techniques used to study the Glass Transition in colloids. We describe features of colloidal systems near and in Glassy states, including tremendous increases in viscosity and relaxation times, dynamical heterogeneity, and ageing, among others. We also compare and contrast the Glass Transition in colloids to that in molecular liquids. Other Glassy systems are briefly discussed, as well as recently developed synthesis techniques that will keep these systems rich with interesting physics for years to come.
Stefan Kasapis - One of the best experts on this subject based on the ideXlab platform.
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Evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon-Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models' (GAB and Gordon-Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tgis required to establish a sound processing and storage stability criteria. © 2005 Elsevier Ltd. All rights reserved.
-
evaluating water activity and Glass Transition concepts for food stability
Journal of Food Engineering, 2007Co-Authors: Shyam S. Sablani, Stefan Kasapis, M. S. RahmanAbstract:Water activity and Glass Transition temperature concepts were used to investigate the connection between the two distinct criteria of food stability. The data on sorption isotherms and Glass Transition temperatures were obtained from the literature. Two most commonly used models i.e. GAB and Gordon–Taylor equations were used to model water activity/moisture content and Glass Transition temperatures/solids content relationships. The models’ (GAB and Gordon–Taylor) parameters were used to estimate water activity and Glass Transition temperature at given moisture/solids content. Results indicate that there is a considerable discrepancy in the temperature-related stability criteria predicted by the concepts of water activity (aw) and the Glass phenomenon (Tg). A greater understanding of water sorption properties and Tg is required to establish a sound processing and storage stability criteria.
Gary L. Hunter - One of the best experts on this subject based on the ideXlab platform.
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the physics of the colloidal Glass Transition
Reports on Progress in Physics, 2012Co-Authors: Gary L. Hunter, Eric R. WeeksAbstract:As one increases the concentration of a colloidal suspension, the system exhibits a dramatic increase in viscosity. Beyond a certain concentration, the system is said to be a colloidal Glass; structurally, the system resembles a liquid, yet motions within the suspension are slow enough that it can be considered essentially frozen. For several decades, colloids have served as a valuable model system for understanding the Glass Transition in molecular systems. The spatial and temporal scales involved allow these systems to be studied by a wide variety of experimental techniques. The focus of this review is the current state of understanding of the colloidal Glass Transition, with an emphasis on experimental observations. A brief introduction is given to important experimental techniques used to study the Glass Transition in colloids. We describe features of colloidal systems near and in Glassy states, including increases in viscosity and relaxation times, dynamical heterogeneity and ageing, among others. We also compare and contrast the Glass Transition in colloids to that in molecular liquids. Other Glassy systems are briefly discussed, as well as recently developed synthesis techniques that will keep these systems rich with interesting physics for years to come.
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The physics of the colloidal Glass Transition
Reports on Progress in Physics, 2012Co-Authors: Gary L. Hunter, Eric R. WeeksAbstract:As one increases the concentration of a colloidal suspension, the system exhibits a dramatic increase in viscosity. Structurally, the system resembles a liquid, yet motions within the suspension are slow enough that it can be considered essentially frozen. This kinetic arrest is the colloidal Glass Transition. For several decades, colloids have served as a valuable model system for understanding the Glass Transition in molecular systems. The spatial and temporal scales involved allow these systems to be studied by a wide variety of experimental techniques. The focus of this review is the current state of understanding of the colloidal Glass Transition. A brief introduction is given to important experimental techniques used to study the Glass Transition in colloids. We describe features of colloidal systems near and in Glassy states, including tremendous increases in viscosity and relaxation times, dynamical heterogeneity, and ageing, among others. We also compare and contrast the Glass Transition in colloids to that in molecular liquids. Other Glassy systems are briefly discussed, as well as recently developed synthesis techniques that will keep these systems rich with interesting physics for years to come.
