Magnetic Resonance Imaging Studies of Process Rheology PDF Download
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Author: G. A. Lo
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
The objectives were to develop experimental and theoretical methods which will provide for improved methods of flow analysis as well as an improved understanding of the flow behavior of solid-filled polymeric suspensions. The objective of the experimental effort was to develop better magnetic resonance (MR) methods to detect and characterize inhomogeneities in uncured solid propellant. The specific experimental methods to be studied are nuclear magnetic resonance imaging methods with 100 microns or better spatial resolution for stationary propellant samples and to develop and characterize methods for imaging the flow of uncured propellants in process streams. Besides assisting the MR experimental effort, the purpose of the rheological effort, was to determine the effects of high solids loading on propellant flow behavior and their effects on continuous processing operations. The objective of the theoretical modeling effort was to develop rigorous numerical models of macroscopic suspension flow in which the polymer-particle interaction physics are obtained from first principles with the air of providing a more thorough understanding of the origin and nature of the observed macroscopic behavior of concentrated solid-particle-filled polymeric suspensions. (jhd).
Author: G. A. Lo
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
The objectives were to develop experimental and theoretical methods which will provide for improved methods of flow analysis as well as an improved understanding of the flow behavior of solid-filled polymeric suspensions. The objective of the experimental effort was to develop better magnetic resonance (MR) methods to detect and characterize inhomogeneities in uncured solid propellant. The specific experimental methods to be studied are nuclear magnetic resonance imaging methods with 100 microns or better spatial resolution for stationary propellant samples and to develop and characterize methods for imaging the flow of uncured propellants in process streams. Besides assisting the MR experimental effort, the purpose of the rheological effort, was to determine the effects of high solids loading on propellant flow behavior and their effects on continuous processing operations. The objective of the theoretical modeling effort was to develop rigorous numerical models of macroscopic suspension flow in which the polymer-particle interaction physics are obtained from first principles with the air of providing a more thorough understanding of the origin and nature of the observed macroscopic behavior of concentrated solid-particle-filled polymeric suspensions. (jhd).
Author: Peter Blümler
Publisher: John Wiley & Sons
ISBN: 3527611835
Category : Science
Languages : en
Pages : 774
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Book Description
'Spatially Resolved Magnetic Resonance' provides comprehensive and exhaustive coverage of the state of the art in magnetic resonance imaging. Focusing on nonclinical applications, readers learn about the possibilities, limitations and strengths of magnetic resonance methods in a broad range of fields, from materials science, medicine, biology, to geology and ecology. New and innovative applications such as polymer and elastomer characterization, analysis of construction materials and material flow, biomedical imaging and plant studies document the significant advances being made in this field. Newcomers will find the tutorial chapter an excellent guide to the fundamentals of magnetic resonance. Based on lectures presented at the Fourth International Conference on Magnetic Resonance Microscopy held in Albuquerque, New Mexico, in October 1997, all chapters have been carefully edited and reviewed. Chemists, physicists, materials scientists, geologists, and life-scientists who wish to assess the potential of magnetic resonance imaging will find this reference a stimulating and exhaustive resource. 'This volume documents a long stride toward maturation and integration, along with the ever increasing power and subtlety of techniques and analyses, and should inspire developers and users in all areas, from medicine to geology.' Paul C. Lauterbur
Author: Brian Hills
Publisher: Wiley-Interscience
ISBN: 9780471170877
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
"Hills is probably the best person I can think of to write this book. He has the deepest background combined with considerable experience in solving problems with food." -R. G. Bryant, University of Virginia. Food scientists have many excellent tools at their disposal with which to study food at both the micro- and macrostructural levels. But, when it comes to analyzing dynamic structural changes in food during processing and storage, none can compare with magnetic resonance imaging (MRI). Still a very young approach, MRI food imaging has contributed greatly to recent advances in food science, and promises to yield much more valuable information in the years ahead. Written by a leading pioneer in the field, Magnetic Resonance Imaging in Food Science covers the latest in MRI food imaging theory and practice. Written primarily for food scientists and engineers, the book offers a practical, unified approach to the subject. Material is organized in three main parts corresponding to the distances of scale probed by MRI studies-namely, the macroscopic, microscopic, and macromolecular. Throughout, the emphasis is on ways in which studies of food undergoing processes can be modeled using the equations of heat, mass, and momentum transport, and how those models can be used in process design optimization programs. Magnetic Resonance Imaging in Food Science provides researchers with the most up-to-date, detailed coverage of: * Traditional and cutting-edge MRI food imaging techniques and technologies, including STRAFI, gradient-echo imaging, and functional imaging * Whole plant functional imaging, flow imaging and rheology, and other specialized MRI applications * The roles of food microstructure and molecular relaxation mechanisms in controlling moisture and heat transport * Techniques for modeling structural changes during food processing. Magnetic Resonance Imaging in Food Science is an important working resource for all researchers engaged in the never-ending struggle to produce safer, higher-quality foods more efficiently.
Author: Youngsoo Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 334
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Book Description
Author: Luigi Landini
Publisher: CRC Press
ISBN: 1420028669
Category : Technology & Engineering
Languages : en
Pages : 632
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Book Description
The popularity of magnetic resonance (MR) imaging in medicine is no mystery: it is non-invasive, it produces high quality structural and functional image data, and it is very versatile and flexible. Research into MR technology is advancing at a blistering pace, and modern engineers must keep up with the latest developments. This is only possible with a firm grounding in the basic principles of MR, and Advanced Image Processing in Magnetic Resonance Imaging solidly integrates this foundational knowledge with the latest advances in the field. Beginning with the basics of signal and image generation and reconstruction, the book covers in detail the signal processing techniques and algorithms, filtering techniques for MR images, quantitative analysis including image registration and integration of EEG and MEG techniques with MR, and MR spectroscopy techniques. The final section of the book explores functional MRI (fMRI) in detail, discussing fundamentals and advanced exploratory data analysis, Bayesian inference, and nonlinear analysis. Many of the results presented in the book are derived from the contributors' own work, imparting highly practical experience through experimental and numerical methods. Contributed by international experts at the forefront of the field, Advanced Image Processing in Magnetic Resonance Imaging is an indispensable guide for anyone interested in further advancing the technology and capabilities of MR imaging.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Mrignayani Kotecha
Publisher: John Wiley & Sons
ISBN: 1119193354
Category : Technology & Engineering
Languages : en
Pages : 444
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Book Description
Magnetic Resonance Imaging in Tissue Engineering provides a unique overview of the field of non-invasive MRI assessment of tissue engineering and regenerative medicine Establish a dialogue between the tissue-engineering scientists and imaging experts and serves as a guide for tissue engineers and biomaterial developers alike Provides comprehensive details of magnetic resonance imaging (MRI) techniques used to assess a variety of engineered and regenerating tissues and organs Covers cell-based therapies, engineered cartilage, bone, meniscus, tendon, ligaments, cardiovascular, liver and bladder tissue engineering and regeneration assessed by MRI Includes a chapter on oxygen imaging method that predominantly is used for assessing hypoxia in solid tumors for improving radiation therapy but has the ability to provide information on design strategies and cellular viability in tissue engineering regenerative medicine
Author: Cynthia Kiyoko Agemura
Publisher:
ISBN:
Category :
Languages : en
Pages : 340
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Book Description
Author: Maria Jose Cardona
Publisher:
ISBN: 9781339542188
Category :
Languages : en
Pages :
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Book Description
Worldwide need for alternatives to fossil fuels has driven significant research effort toward the development and scale-up of sustainable forms of energy. Second-generation biofuels, obtained from the breakdown of lignocellulosic biomass (e.g., agricultural residues), present a promising alternative. In biofuel production, the enzymatic hydrolysis of cellulose to glucose is currently one of the most expensive steps in the biochemical breakdown of lignocellulosic biomass. Economic considerations for large-scale implementation of this process demand operation at high solids loadings of biomass (>15\% (w/w)) due to potential for higher product concentrations and reduction of water usage throughout the biorefining process. In the high-solids regime, however, biomass slurries form a high viscosity, non-Newtonian slurry that introduces processing challenges, especially during the initial stages of hydrolysis (liquefaction), due to the low availability of water in the bulk phase. Furthermore, a concomitant reduction in glucose yields with increase in solids loadings has been observed, a phenomenon that is not well understood, but if overcome could hold the key to achieving desirable yields during hydrolysis. In order to better understand liquefaction, a magnetic resonance imaging (MRI) rheometer was used to perform in-line, in situ, real-time, and noninvasive studies on biomass slurries undergoing enzymatic hydrolysis. Batch and fed-batch experiments were done on lignocellulosic and cellulosic substrates with both purified and mixtures of enzymes, under various reaction conditions. The mechanism of liquefaction was found to be decoupled from the mechanism of saccharification. In addition, end product inhibition was found to have an impact on both saccharification and liquefaction during the initial stage of hydrolysis, which has an impact on scale-up of hydrolysis processes. Lastly, to address and overcome high-solids limitations, a fed-batch liquefaction process based on using real-time slurry yield stress as a process control variable was designed and tested with a delignified cellulosic substrate. The timing of enzyme addition relative to biomass addition influenced process efficiency, and the upper limit of solids loading was ultimately limited by end product inhibition. The impact of these findings on process kinetic modeling and scale-up are also discussed.
Author: Nicole Seiberlich
Publisher: Academic Press
ISBN: 0128170581
Category : Computers
Languages : en
Pages : 1094
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Book Description
Quantitative Magnetic Resonance Imaging is a 'go-to' reference for methods and applications of quantitative magnetic resonance imaging, with specific sections on Relaxometry, Perfusion, and Diffusion. Each section will start with an explanation of the basic techniques for mapping the tissue property in question, including a description of the challenges that arise when using these basic approaches. For properties which can be measured in multiple ways, each of these basic methods will be described in separate chapters. Following the basics, a chapter in each section presents more advanced and recently proposed techniques for quantitative tissue property mapping, with a concluding chapter on clinical applications. The reader will learn: - The basic physics behind tissue property mapping - How to implement basic pulse sequences for the quantitative measurement of tissue properties - The strengths and limitations to the basic and more rapid methods for mapping the magnetic relaxation properties T1, T2, and T2* - The pros and cons for different approaches to mapping perfusion - The methods of Diffusion-weighted imaging and how this approach can be used to generate diffusion tensor - maps and more complex representations of diffusion - How flow, magneto-electric tissue property, fat fraction, exchange, elastography, and temperature mapping are performed - How fast imaging approaches including parallel imaging, compressed sensing, and Magnetic Resonance - Fingerprinting can be used to accelerate or improve tissue property mapping schemes - How tissue property mapping is used clinically in different organs - Structured to cater for MRI researchers and graduate students with a wide variety of backgrounds - Explains basic methods for quantitatively measuring tissue properties with MRI - including T1, T2, perfusion, diffusion, fat and iron fraction, elastography, flow, susceptibility - enabling the implementation of pulse sequences to perform measurements - Shows the limitations of the techniques and explains the challenges to the clinical adoption of these traditional methods, presenting the latest research in rapid quantitative imaging which has the possibility to tackle these challenges - Each section contains a chapter explaining the basics of novel ideas for quantitative mapping, such as compressed sensing and Magnetic Resonance Fingerprinting-based approaches
