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Genesis and evolution of the kaolin
Genesis and evolution of the kaolin

... form the crystal. The T-O layer has two different surfaces: A surface of oxygens and a surface of hydroxyls (external hydroxyls). This fact determines the nature of the interlayer bonding between the successive layers, hydrogen bonding, and the need of a relative shift between adjacent layers = a/3 ...
Electrodeposition of rare earth metals in ionic liquids
Electrodeposition of rare earth metals in ionic liquids

Spatial Structure of Electrical Diffuse Layers in Highly Concentrated
Spatial Structure of Electrical Diffuse Layers in Highly Concentrated

... complexity should capture several energy scales and short-/ long-range interactions, e.g., electrostatic, van der Waals, hydrogen bonds.58 However, as in many other complex systems (e.g., biological or environmental media), a detailed or ab initio theory that allows intuitive theoretical progress as ...
Thermodynamics Institute of Lifelong Learning, University of Delhi
Thermodynamics Institute of Lifelong Learning, University of Delhi

... Depending upon the path followed by the system, there are two types of processes: reversible and irreversible processes. Reversible process: A process is said to be reversible if the system undergoes a change in the state through a specified sequence of intermediate states, each one of which is an e ...
Quiz Keys - Section 10
Quiz Keys - Section 10

... Problem 1 (7 points). In class we discussed the problems associated with high altitude caused by lower boiling points of liquids at lower pressures. A different kind of problem may be caused by changing a boiling point of a liquid at altitudes below sea level. Northern Europe (especially Sweden and ...
Unconstrained Structure Formation in Coarse
Unconstrained Structure Formation in Coarse

... simulations. To cope with this difficulty, increasingly more accurate and sophisticated coarse-grained models are currently being developed. In the present thesis, we introduce a solvent-free coarse-grained model for proteins. Proteins are modeled by four beads per amino acid, providing enough backb ...
Pdf
Pdf

... to the interface. (We designate these directions as the x and y axes, and the direction perpendicular to the interface as the z axis.) The atoms originally in the solid box were then held fixed while the atoms originally in the liquid box were relaxed in the NVT ensemble at a temperature close to mel ...
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... centres to operate. Copper(I) exchanged zeolites can be considered as the best known type of inorganic tri-dimensionally organized catalysts, because of their crystalline structure and of the controlled dispersion of the metal centres which ensure a good structural definition to the adsorbing sites.2 ...
Detailed modeling of the evaporation and thermal decomposition of
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... the Hirschfelder law [38-40] rather than on the less general Fick's equation. Moreover, the heat flux due to species diffusion is taken into account in addition to the classical conduction heat flux between the gas and the liquid droplets. The liquid phase analysis is based on the infinite thermal c ...
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... Although the fundamental theoretical ...
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Brittle fracture - Flaney Associates
Brittle fracture - Flaney Associates

Appendix B: Agarose Physical Chemistry Agarose Physical
Appendix B: Agarose Physical Chemistry Agarose Physical

... involves a shift from a random coil in solution to a double helix in the initial stages of gelation, and then to bundles of double helices in the final stage (Figure 4). The average pore size varies with concentration and type of agarose, but is typically 100 to 300 nm (6). ...
Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed
Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed

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... temperature, and the object that receives energy is at a lower temperature. We would be able to observe that the electrical resistance of the warmer object decreases with time, and that of the colder block increases with time; eventually there would be no change in the electrical resistances of thes ...
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Full-Text PDF

... As the temperature increased from 400 °C to 600 °C, the intensity of aluminum sulfate phase peaks increased. The XRD results do not show that the sample was a hydrated salt with other impurities present as well. Therefore, water molecules and impurities might already have been removed at this temper ...
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... option, but as these simulations becomes very time consuming for large systems, or if statistical averages are needed, quantum mechanics is practically not possible. Classical simulations, such as molecular dynamics- and Monte Carlo simulations offer an alternative to the quantum mechanical methods, ...
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Confessions of a

Concept of Capillary Collapse in Air Space
Concept of Capillary Collapse in Air Space

... microscope that vertically mobile on the body accepted as a micrometer and carrier of glass objects with sensitive motions of fine adjustment switches, a cup of distillate water (201 000 mg), smooth glass plates (2 x 125 x 57 mm, and 37 502 mg) and a glass cube (133 x 125 x 57 mm, and 250 988 mg) we ...
Simulating Induced Interdigitation in Membranes
Simulating Induced Interdigitation in Membranes

Terminating species and Lewis acid-base low-dimensional compounds
Terminating species and Lewis acid-base low-dimensional compounds

Distortions Generated by Welding Process Using ANSYS-FEA
Distortions Generated by Welding Process Using ANSYS-FEA

Correlated/non-correlated ion dynamics of charge
Correlated/non-correlated ion dynamics of charge

... The title salt, 3-butyl-1-methyl-1H-imidazolium hexafluorophosphate, [C4mim][PF6] (see Fig. 1), has to date received much attention in the arena of molecular dynamics (MD), usually employing static high field approaches that probe fast motions.9–11 Our interest in this particular salt, which possess ...
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Glass transition



The glass–liquid transition or glass transition for short is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber-like state. An amorphous solid that exhibits a glass transition is called a glass. Supercooling a viscous liquid into the glass state is called vitrification, from the Latin vitreum, ""glass"" via French vitrifier.Despite the massive change in the physical properties of a material through its glass transition, the transition is not itself a phase transition of any kind; rather it is a laboratory phenomenon extending over a range of temperature and defined by one of several conventions. Such conventions include a constant cooling rate (20 K/min) and a viscosity threshold of 1012 Pa·s, among others. Upon cooling or heating through this glass-transition range, the material also exhibits a smooth step in the thermal-expansion coefficient and in the specific heat, with the location of these effects again being dependent on the history of the material. However, the question of whether some phase transition underlies the glass transition is a matter of continuing research.The glass-transition temperature Tg is always lower than the melting temperature, Tm, of the crystalline state of the material, if one exists.
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