Download or read book Relaxation Dynamics of Confined Supercooled Water written by Johan Hedström and published by . This book was released on 2007 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Confinement on the Thermodynamics of Supercooled Water written by and published by . This book was released on 2012 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The main focus of this thesis is to understand how confinement alters the phase diagram of supercooled liquid water by employing methods of statistical mechanics and numerical simulations.Water is very complex and anomalous when compared to simple liquids. For example, experimental data for liquid water reveals the presence of a temperature of maximum density (TMD) below which the density decreases under isobaric cooling. Another anomaly is the hypothesized liquid-liquid phase transition (LLPT) between two types of liquid water with different densities. In this thesis we study how confinement affects such anomalies as TMD and LLPT in supercooled liquid water.This thesis is separated into three parts: (i) Monte Carlo simulations of a 2D coarse-grained model of a water layer confined in a fixed disordered matrix of hydrophobic nanoparticles, (ii) molecular dynamics simulations of a Jagla ramp model of liquid confined in fixed ordered and disordered matrices of hydrophobic nanoparticles, and (iii) all-atom simulations of trehalose and maltose in aqueous solution of lysozyme.In Part (i), we perform Monte Carlo simulations and find that a nanoparticle concentration as small as 2.4% is enough to destroy the LLPT for pressure P > 0.14 GPa. Moreover, we find a substantial (more than 90%) decrease of compressibility, thermal expansion coefficient and specific heat at high P and low temperature T upon increase of nanoparticle concentration from 0% to 25%.In Part (ii), we ask how, for single component systems interacting via a soft-core isotropic potential with two characteristic length scales, the geometry of hydrophobic confinement affects the phase diagram. We use molecular dynamics simulations to study particles interacting through a ramp potential and a shoulder potential, each confined in a fixed matrix of nanoscopic particles with a fixed volume fraction. We find a substantial weakening of the LLPT and the disappearance of TMD upon the increase of disorder in the confining geometry.In Part (iii), we study aqueous systems with all-atom simulations. We are currently investigating the mechanism of water-trehalose-protein and water-maltose-protein interaction upon supercooling for its relevance to bioprotection.
Download or read book Dynamics of Soft Matter written by VICTORIA GARCIA SAKAI and published by Springer Science & Business Media. This book was released on 2011-12-18 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Soft Matter: Neutron Applications provides an overview of neutron scattering techniques that measure temporal and spatial correlations simultaneously, at the microscopic and/or mesoscopic scale. These techniques offer answers to new questions arising at the interface of physics, chemistry, and biology. Knowledge of the dynamics at these levels is crucial to understanding the soft matter field, which includes colloids, polymers, membranes, biological macromolecules, foams, emulsions towards biological & biomimetic systems, and phenomena involving wetting, friction, adhesion, or microfluidics. Emphasizing the complementarities of scattering techniques with other spectroscopic ones, this volume also highlights the potential gain in combining techniques such as rheology, NMR, light scattering, dielectric spectroscopy, as well as synchrotron radiation experiments. Key areas covered include polymer science, biological materials, complex fluids and surface science.
Download or read book 3rd International Workshop on Dynamics in Confinement written by Michael Koza and published by . This book was released on 2007 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water in Biological and Chemical Processes written by Biman Bagchi and published by Cambridge University Press. This book was released on 2013-11-14 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unified overview of the dynamical properties of water and its unique and diverse role in biological and chemical processes.
Download or read book Glass Transition and Phase Transitions in Food and Biological Materials written by Jasim Ahmed and published by John Wiley & Sons. This book was released on 2017-02-09 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass and State Transitions in Food and Biological Materials describes how glass transition has been applied to food micro-structure, food processing, product development, storage studies, packaging development and other areas. This book has been structured so that readers can initially grasp the basic principles and instrumentation, before moving through the various applications. In summary, the book will provide the “missing link” between food science and material science/polymer engineering. This will allow food scientists to better understand the concept and applications of thermal properties.
Download or read book Quantum Effects in the Dynamics of Deeply Supercooled Water written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of its simple chemical structure, water remains one of the most puzzling liquids with many anomalies at low temperatures. Combining neutron scattering and dielectric relaxation spectroscopy, we show that quantum fluctuations are not negligible in deeply supercooled water. Our dielectric measurements reveal the anomalously weak temperature dependence of structural relaxation in vapor-deposited water close to the glass transition temperature Tg~136K. We demonstrate that this anomalous behavior can be explained well by quantum effects. In conclusion, these results have significant implications for our understanding of water dynamics.
Download or read book Dielectric Relaxation in Biological Systems written by Valerica Raicu and published by Oxford University Press, USA. This book was released on 2015 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the theoretical basis and practical aspects of the study of dielectric properties of biological systems, such as water, electrolyte and polyelectrolytes, solutions of biological macromolecules, cells suspensions and cellular systems.
Download or read book Dynamics in Geometrical Confinement written by Friedrich Kremer and published by Springer. This book was released on 2014-06-03 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the dynamics of low molecular weight and polymeric molecules when they are constrained under conditions of geometrical confinement. It covers geometrical confinement in different dimensionalities: (i) in nanometer thin layers or self supporting films (1-dimensional confinement) (ii) in pores or tubes with nanometric diameters (2-dimensional confinement) (iii) as micelles embedded in matrices (3-dimensional) or as nanodroplets. The dynamics under such conditions have been a much discussed and central topic in the focus of intense worldwide research activities within the last two decades. The present book discusses how the resulting molecular mobility is influenced by the subtle counterbalance between surface effects (typically slowing down molecular dynamics through attractive guest/host interactions) and confinement effects (typically increasing the mobility). It also explains how these influences can be modified and tuned, e.g. through appropriate surface coatings, film thicknesses or pore diameters. "Dynamics in Confinement" sums up the present state-of-the-art and introduces to the analytical methods of choice for the study of dynamics in nanometer-scale confinement.
Download or read book Crystallization as Studied by Broadband Dielectric Spectroscopy written by Tiberio A. Ezquerra and published by Springer Nature. This book was released on 2020-10-28 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new approaches that offer a better characterization of the interrelationship between crystalline and amorphous phases. In recent years, the use of dielectric spectroscopy has significantly improved our understanding of crystallization. The combination of modern scattering methods, using either synchrotron light or neutrons and infrared spectroscopy with dielectrics, is now helping to reveal modifications of both crystalline and amorphous phases. In turn, this yields insights into the underlying physics of the crystallization process in various materials, e.g. polymers, liquid crystals and diverse liquids. The book offers an excellent introduction to a valuable application of dielectric spectroscopy, and a helpful guide for every scientist who wants to study crystallization processes by means of dielectric spectroscopy.
Download or read book Dynamics of Biological Macromolecules by Neutron Scattering written by Salvatore Magazù and published by Bentham Science Publishers. This book was released on 2011 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Biological Macromolecules by Neutron Scattering provides insight into the study of the dynamics of biological macromolecules by neutron scattering techniques. The applicability of neutron scattering to expanding fields of biological studies is
Download or read book Spectroscopic Properties of Inorganic and Organometallic Compounds written by Jack Yarwood and published by Royal Society of Chemistry. This book was released on 2011-07-31 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation This series provides an unequalled source of information on an area of chemistry that continues to grow in importance. Divided into sections mainly according to the particular spectroscopic technique used, coverage in each volume includes: NMR (with reference to stereochemistry, dynamic systems, paramagnetic complexes, solid state NMR and Groups 13-18); nuclear quadrupole resonance spectroscopy; vibrational spectroscopy of main group and transition element compounds and coordinated ligands; and electron diffraction. Reflecting the growing volume of published work in the field, researchers will find this an invaluable source of information on current methods and applications.
Download or read book Aspects of Physical Biology written by Giancarlo Franzese and published by Springer. This book was released on 2008-12-02 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application to Biology of the methodologies developed in Physics is attracting an increasing interest from the scientific community. It has led to the emergence of a new interdisciplinary field, called Physical Biology, with the aim of reaching a better understanding of the biological mechanisms at molecular and cellular levels. Statistical Mechanics in particular plays an important role in the development of this new field. For this reason, the XXth session of the famous Sitges Conference on Statistical Physics was dedicated to "Physical Biology: from Molecular Interactions to Cellular Behavior". As is by now tradition, a number of lectures were subsequently selected, expanded and updated for publication as lecture notes, so as to provide both a state-of-the-art introduction and overview to a number of subjects of broader interest and to favor the interchange and cross-fertilization of ideas between biologists and physicists. The present volume focuses on three main subtopics (biological water, protein solutions as well as transport and replication), presenting for each of them the on-going debates on recent results. The role of water in biological processes, the mechanisms of protein folding, the phases and cooperative effects in biological solutions, the thermodynamic description of replication, transport and neural activity, all are subjects that are revised in this volume, based on new experiments and new theoretical interpretations.
Download or read book Steam Water and Hydrothermal Systems written by Peter R. Tremaine and published by NRC Research Press. This book was released on 2000 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work includes 140 papers on pure and applied research of physics and chemistry of hydrothermal systems. It includes papers on metastable states, nucleation, super-cooled water and high temperature aqueous solutions.
Download or read book Nano Micro Science and Technology in Biorheology written by Rio Kita and published by Springer. This book was released on 2015-06-09 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating basic to applied science and technology in medicine, pharmaceutics, molecular biology, biomedical engineering, biophysics and irreversible thermodynamics, this book covers cutting-edge research of the structure and function of biomaterials at a molecular level. In addition, it examines for the first time studies performed at the nano- and micro scale. With innovative technologies and methodologies aiming to clarify the molecular mechanism and macroscopic relationship, Nano/Micro Science and Technology in Biorheology thoroughly covers the basic principles of these studies, with helpful step-by-step explanations of methodologies and insight into medical applications. Written by pioneering researchers, the book is a valuable resource for academics and industry scientists, as well as graduate students, working or studying in bio-related fields.
Download or read book Scattering Methods in Complex Fluids written by Sow-Hsin Chen and published by Cambridge University Press. This book was released on 2015-04-09 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern and experimental perspective on the developments in recent decades of the physics of complex liquids.
Download or read book Nanomaterials Design and Simulation written by Perla Balbuena and published by Elsevier. This book was released on 2006-11-02 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, several approaches have been developed for designing nano-structured or molecularly-structured materials. These advances have revolutionized practically all fields of science and engineering, providing an additional design variable, the feature size of the nano-structures, which can be tailored to provide new materials with very special characteristics. Nanomaterials: Design and Simulation explores the role that such advances have made toward a rational design of nanostructures and covers a variety of methods from ab initio electronic structure techniques, ab initio molecular dynamics, to classical molecular dynamics, also being complemented by coarse-graining and continuum methods. Also included is an overview of how the development of these computational tools has enabled the possibility of exploring nanoscopic details and using such information for the prediction of physical and chemical properties that are not always possible to be obtained experimentally. * Provides an overview of approaches that have been developed for designing nano-structured or molecularly-structured materials.* This volume covers several aspects of the simulation and design of nanomaterials analyzed by a selected group of active researchers in the field. * Looks at how the advancement of computational tools have enabled nanoscopic prediction of physical and chemical properties
