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Author: Rustem Valiullin Publisher: Royal Society of Chemistry ISBN: 1782621903 Category : Science Languages : en Pages : 594
Book Description
With the increasing role of porous solids in conventional and newly emerging technologies, there is an urgent need for a deeper understanding of fluid behaviour confined to pore spaces of these materials especially with regard to their transport properties. From its early years, NMR has been recognized as a powerful experimental technique enabling direct access to this information. In the last two decades, the methodological development of different NMR techniques to assess dynamic properties of adsorbed ensembles has been progressed. This book will report on these recent advances and look at new broader applications in engineering and medicine. Having both academic and industrial relevance, this unique reference will be for specialists working in the research areas and for advanced graduate and postgraduate studies who want information on the versatility of diffusion NMR.
Author: Leonardo Dagdug Publisher: Springer ISBN: 9783031464744 Category : Science Languages : en Pages : 0
Book Description
This book offers the reader a journey through the counterintuitive nature of Brownian motion under confinement. Diffusion is a universal phenomenon that controls a wide range of physical, chemical, and biological processes. The transport of spatially-constrained molecules and small particles is ubiquitous in nature and technology and plays an essential role in different processes. Understanding the physics of diffusion under conditions of confinement is essential for a number of biological phenomena and potential technological applications in micro- and nanofluidics, among others. Studies on diffusion under confinement are typically difficult to understand for young scientists and students because of the extensive background on diffusion processes, physics, and mathematics that is required. All of this information is provided in this book, which is essentially self-contained as a result of the authors’ efforts to make it accessible to an audience of students from a variety of different backgrounds. The book also provides the necessary mathematical details so students can follow the technical process required to solve each problem. Readers will also find detailed explanations of the main results based on the last 30 years of research devoted to studying diffusion under confinement. The authors approach the physical problem from various angles and discuss the role of geometries and boundary conditions in diffusion. This textbook serves as a comprehensive and modern overview of Brownian motion under confinement and is intended for young scientists, graduate students, and advanced undergraduates in physics, physical chemistry, biology, chemistry, chemical engineering, biochemistry, bioengineering, and polymer and material sciences.
Author: Rustem Valiullin Publisher: Royal Society of Chemistry ISBN: 1782621903 Category : Science Languages : en Pages : 594
Book Description
With the increasing role of porous solids in conventional and newly emerging technologies, there is an urgent need for a deeper understanding of fluid behaviour confined to pore spaces of these materials especially with regard to their transport properties. From its early years, NMR has been recognized as a powerful experimental technique enabling direct access to this information. In the last two decades, the methodological development of different NMR techniques to assess dynamic properties of adsorbed ensembles has been progressed. This book will report on these recent advances and look at new broader applications in engineering and medicine. Having both academic and industrial relevance, this unique reference will be for specialists working in the research areas and for advanced graduate and postgraduate studies who want information on the versatility of diffusion NMR.
Author: Hellmut G. Karge Publisher: Springer Science & Business Media ISBN: 3540739661 Category : Science Languages : en Pages : 411
Book Description
"Molecular Sieves - Science and Technology" covers, in a comprehensive manner, the science and technology of zeolites and all related microporous and mesoporous materials. The contributions are grouped together topically in such a way that each volume deals with a specific sub-field. Volume 7 treats fundamentals and analyses of adsorption and diffusion in zeolites including single-file diffusion. Various methods of measuring adsorption and diffusion are described and discussed.
Author: Evren Özarslan Publisher: Springer Nature ISBN: 3030562158 Category : Algebra Languages : en Pages : 284
Book Description
This open access book focuses on processing, modeling, and visualization of anisotropy information, which are often addressed by employing sophisticated mathematical constructs such as tensors and other higher-order descriptors. It also discusses adaptations of such constructs to problems encountered in seemingly dissimilar areas of medical imaging, physical sciences, and engineering. Featuring original research contributions as well as insightful reviews for scientists interested in handling anisotropy information, it covers topics such as pertinent geometric and algebraic properties of tensors and tensor fields, challenges faced in processing and visualizing different types of data, statistical techniques for data processing, and specific applications like mapping white-matter fiber tracts in the brain. The book helps readers grasp the current challenges in the field and provides information on the techniques devised to address them. Further, it facilitates the transfer of knowledge between different disciplines in order to advance the research frontiers in these areas. This multidisciplinary book presents, in part, the outcomes of the seventh in a series of Dagstuhl seminars devoted to visualization and processing of tensor fields and higher-order descriptors, which was held in Dagstuhl, Germany, on October 28-November 2, 2018.
Author: Jörg Kärger Publisher: John Wiley & Sons ISBN: 3527651292 Category : Science Languages : en Pages : 932
Book Description
Atoms and molecules in all states of matter are subject to continuous irregular movement. This process, referred to as diffusion, is among the most general and basic phenomena in nature and determines the performance of many technological processes. This book provides an introduction to the fascinating world of diffusion in microporous solids. Jointly written by three well-known researchers in this field, it presents a coherent treatise, rather than a compilation of separate review articles, covering the theoretical fundamentals, molecular modeling, experimental observation and technical applications. Based on the book Diffusion in Zeolites and other Microporous Solids, originally published in 1992, it illustrates the remarkable speed with which this field has developed since that time. Specific topics include: new families of nanoporous materials, micro-imaging and single-particle tracking, direct monitoring of transient profiles by interference microscopy, single-file diffusion and new approaches to molecular modeling.
Author: Rainer Kimmich Publisher: Springer Science & Business Media ISBN: 9400755368 Category : Science Languages : en Pages : 670
Book Description
Practical applications of soft-matter dynamics are of vital importance in material science, chemical engineering, biophysics and biotechnology, food processing, plastic industry, micro- and nano-system technology, and other technologies based on non-crystalline and non-glassy materials. Principles of Soft-Matter Dynamics. Basic Theories, Non-invasive Methods, Mesoscopic Aspects covers fundamental dynamic phenomena such as diffusion, relaxation, fluid dynamics, normal modes, order fluctuations, adsorption and wetting processes. It also elucidates the applications of the principles and of the methods referring to polymers, liquid crystals and other mesophases, membranes, amphiphilic systems, networks, and porous media including multiphase and multi-component materials, colloids, fine-particles, and emulsions. The book presents all formalisms, examines the basic concepts needed for applications of soft-matter science, and reviews non-invasive experimental techniques such as the multi-faceted realm of NMR methods, neutron and light quasi-elastic scattering, mechanical relaxation and dielectric broadband spectroscopy which are treated and compared on a common and consistent foundation. The standard concepts of dynamics in fluids, polymers, liquid crystals, colloids and adsorbates are comprehensively derived in a step-by-step manner. Principles and analogies common to diverse application fields are elucidated and theoretical and experimental aspects are supplemented by computational-physics considerations. Principles of Soft-Matter Dynamics. Basic Theories, Non-invasive Methods, Mesoscopic Aspects appeals to graduate and PhD students, post-docs, researchers, and industrial scientists alike.
Author: Friedrich Kremer Publisher: Springer ISBN: 3319061003 Category : Technology & Engineering Languages : en Pages : 365
Book Description
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.
Author: Amandeep Kaur Sangha Publisher: ISBN: Category : Languages : en Pages : 224
Book Description
Abstract: Conformational dynamics is of fundamental importance for the folding and the function of proteins. Structural changes occur over a wide range of time scales, and folding itself is the slowest, long-time process, Rates vary with the extent of folding, as measured by an order parameter, Q. The dynamics of the order parameter is studied in detail using a coarse-grained model of the protein and classical molecular dynamics simulations. A description of folding is attempted in terms of the Smoluchowski equation (SE), based on a picture of diffusion of the order parameter under the influence of a thermodynamic force. A new method is developed to obtain the order parameter dependent diffusion coefficient, D ( Q ), from short-time simulations. D ( Q ) is shown to change significantly as the protein folds. It is found that folding obeys neither the one-dimensional SE nor a normal-diffusion continuous time random walk (CTRW), because the order parameter follows sub-diffusion. The anomalous nature of the order parameter dynamics is incorporated into the ordinary SE based on the idea that the folding pathways have fractal character. Obtaining the free energy from the statistical temperature molecular dynamics (STMD) enhanced sampling algorithm and D ( Q ) from short-time simulations, mean first passage times of folding (MFPT) calculated from our fractal SE theory are in quantitative agreement with simulated long-time folding dynamics. Protein folding occurs in a crowded and heterogeneous environment inside the cell. Interactions of the protein with other cellular biomolecules may hamper the folding process. Chaperones are known to help a large fraction of newly synthesized proteins in their proper folding. To understand the mechanism of chaperonin-mediated protein folding, the thermodynamics and kinetics of a frustrated model protein are studied inside a chaperonin cavity modeled as a sphere of tunable hydrophobicity. Using the inherent structure (IS) approach, we found that folding is preferred over misfolding inside a slightly hydrophobic chaperonin cavity. The occupation probabilities of the misfolded states are entropically suppressed due to smaller associated configurational volumes.
Author: Rustem Valiullin
Author: Leonardo Dagdug
Author: Rustem Valiullin
Author: Hellmut G. Karge
Author: Evren Özarslan
Author: Jörg Kärger
Author: Rainer Kimmich
Author: B. Frick
Author: Friedrich Kremer
Author: 
Author: Amandeep Kaur Sangha