Restriction and Inhomogeneous Magnetic Fields in the Nuclear Magnetic Resonance Study of Diffusion PDF Download
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Author: Lukasz J. Zielinski
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 390
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Book Description
Author: Lukasz J. Zielinski
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 390
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Book Description
Author: Federico Casanova
Publisher: Springer Science & Business Media
ISBN: 3642163076
Category : Technology & Engineering
Languages : en
Pages : 254
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Book Description
This book describes the design of the first functioning single-sided tomograph, the related measurement methods, and a number of applications in medicine, materials science, and chemical engineering. It will be the first comprehensive account of this new device and its applications. Among the key advances of this method is that images can be obtained in much shorter times than originally anticipated, and that even vector maps of flow fields can be measured although the magnetic fields are highly inhomogeneous. Furthermore, the equipment is small, mobile and affordable to small and medium enterprises and can be located in doctors’ offices.
Author: Richard Conable Wayne
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 276
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Book Description
Author: Rustem Valiullin
Publisher: Royal Society of Chemistry
ISBN: 1782623779
Category : Science
Languages : en
Pages : 595
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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: William S. Price
Publisher: Cambridge University Press
ISBN: 0521806968
Category : Medical
Languages : en
Pages : 417
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Book Description
Overview of NMR theory and applications in fluid systems, fully referenced for research use.
Author: Paul T. Callaghan
Publisher: OUP Oxford
ISBN: 0191621048
Category : Science
Languages : en
Pages : 568
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Book Description
Taking the reader through the underlying principles of molecular translational dynamics, this book outlines the ways in which magnetic resonance, through the use of magnetic field gradients, can reveal those dynamics. The measurement of diffusion and flow, over different length and time scales, provides unique insight regarding fluid interactions with porous materials, as well as molecular organisation in soft matter and complex fluids. The book covers both time and frequency domain methodologies, as well as advances in scattering and diffraction methods, multidimensional exchange and correlation experiments and orientational correlation methods ideal for studying anisotropic environments. At the heart of these new methods resides the ubiquitous spin echo, a phenomenon whose discovery underpins nearly every major development in magnetic resonance methodology. Measuring molecular translational motion does not require high spectral resolution and so finds application in new NMR technologies concerned with 'outside the laboratory' applications, in geophysics and petroleum physics, in horticulture, in food technology, in security screening, and in environmental monitoring.
Author: G. A. Webb
Publisher: Royal Society of Chemistry
ISBN: 0854043527
Category : Medical
Languages : en
Pages : 620
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Book Description
For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage.
Author: Lloyd Jackman
Publisher: Elsevier
ISBN: 032314358X
Category : Science
Languages : en
Pages : 677
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Book Description
Dynamic Nuclear Magnetic Resonance Spectroscopy provides an overview of the state of knowledge in dynamic nuclear magnetic resonance (DNMR) spectroscopy. The early chapters describe the theoretical basis and practical techniques which have or will be used for extracting kinetic data from DNMR spectra. The subsequent chapters provide reviews of the many areas in which DNMR spectroscopy has been applied. Key topics covered include nuclear exchange processes; band-shape analysis; application of nonselective pulsed NMR experiments: diffusion and chemical exchange; spin-spin relaxation time determination; rotation about single and double bonds in organic molecules; and dynamic molecular processes in inorganic and organometallic compounds. Also discussed are studies on stereochemical nonrigidity in organometallic and metal carbonyl compounds; fluxional allyl complexes; carbonium ion rearrangements; and proton transfer processes. It is hoped that this volume will provide a literature guide, source book, and progress report which will be helpful to all those who will continue or will begin work in this field.
Author: Jason Louis Hobson
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 214
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Book Description
Linear magnetic field gradients are used in conventional magnetic resonance (MR) imaging in order to spatially encode and/or resolve nuclear spin distributions. These gradients are normally thought of as being unidirectional, but are always accompanied by orthogonal field components and gradients. These concomitant gradients can largely be ignored as long as the curvature they induce in magnetic field lines is small compared to inverse dimensions of the field of view. Recent attempts to acquire MR images in milliTesla magnetic fields have sparked interest in trying to understand the potential influence of concomitant field gradients. In this thesis a series of NMR experiments intended to probe diffusion of 3He gas within a restricted geometry and in very-low magnetic fields are described. Data from these experiments show clear evidence for the perturbing influence of concomitant gradients, and can be qualitatively understood in terms of a simple model that ignores diffusion.
Author: Julien Valette
Publisher: Frontiers Media SA
ISBN: 2889458415
Category :
Languages : en
Pages : 193
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Book Description
Magnetic resonance imaging (MRI) and spectroscopy (MRS) techniques have opened new doors for examining biological tissues in vivo. By combining sensitization to diffusion using magnetic field gradients with a variety of imaging and localization schemes, diffusion-weighted MRI and diffusion-weighted MRS allow investigating translational diffusion of endogenous molecules, such as water or metabolites, in biological tissues, most commonly the brain but also other organs such as the prostate. The typical voxel resolution of MRI or MRS is in the millimeter to centimeter range, much lower than the cellular scale. However, as molecules are typically diffusing over just a few µm during the duration of the measurement (the “diffusion time”) and encounter numerous biological membranes at these scales, the average cellular microstructure has a critical influence on the measured diffusion signal. Hence, diffusion-weighted MRI and diffusion-weighted MRS are sensitive to tissue microstructure at a scale well below the nominal imaging resolution. However, the connection between diffusion properties and tissue microstructure remains indirect, so any attempt to quantify microstructure will rely on modeling. The goal of this Research Topic was to gather experts in various acquisition and modeling strategies and show how these approaches, despite their own strengths and weaknesses, can yield unique information about cellular microstructure, and sometimes complement each other.
