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NMR Methods for the Investigation of Structure and Transport

2011-10-01 Science
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Release : 2011-10-01
Genre : Science
Kind : eBook
Book Rating : 285/5 ( reviews)

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Book Synopsis NMR Methods for the Investigation of Structure and Transport by : Edme H Hardy

Download or read book NMR Methods for the Investigation of Structure and Transport written by Edme H Hardy. This book was released on 2011-10-01. Available in PDF, EPUB and Kindle. Book excerpt: Methods of nuclear magnetic resonance (NMR) are increasingly applied in engineering sciences. The book summarizes research in the field of chemical and process engineering performed at the Karlsruhe Institute of Technology (KIT). Fundamentals of the methods are exposed for readers with an engineering background. Applications cover the fields of mechanical process engineering (filtration, solid-liquid separation, powder mixing, rheometry), chemical process engineering (trickle-bed reactor, ceramic sponges), bioprocess engineering (biofilm growth), and food process engineering (microwave heating, emulsions). Magnetic Resonance Imaging (MRI) as well as low-field NMR are covered with notes on hardware. Emphasis is placed on quantitative data analysis and image processing.

Development and Application of NMR-methods for Structural Investigations of Small Molecules and Proteins

2007
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Release : 2007
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Book Synopsis Development and Application of NMR-methods for Structural Investigations of Small Molecules and Proteins by : Peter Haberz

Download or read book Development and Application of NMR-methods for Structural Investigations of Small Molecules and Proteins written by Peter Haberz. This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt:

NMR Methods for a Comprehensive and Fast Characterisation of Mass Transport in Porous Materials

2023
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Release : 2023
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Book Synopsis NMR Methods for a Comprehensive and Fast Characterisation of Mass Transport in Porous Materials by : Adrian Ricke

Download or read book NMR Methods for a Comprehensive and Fast Characterisation of Mass Transport in Porous Materials written by Adrian Ricke. This book was released on 2023. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Magnetic Resonance (NMR) is a powerful tool for non-invasively investigating static and dynamic properties of fluids inside complex and opaque structures. Various properties such as substance distribution, temperature, flow velocities, diffusion properties and much more can be imaged three-dimensionally. The Magnetic Resonance Velocimetry (MRV) allows for the in situ analysis of the local flow velocity of fluids. Such an analysis characterises mass transport properties and helps to validate or improve numerical predictions for porous media. However, the benefit of such validations is lowered by several problems worsening the measurement accuracy. This work addresses systematic errors and the influence of noise, which may reduce the accuracy of MRV measurements. Different techniques are described to minimise or correct displacement and phase errors. In particular, the so-called dual-Velocity ENCoding (VENC) technique is considered. It is described how the ratio between low- and high-VENC value should be chosen in order to obtain the highest possible improvement of the Velocity-to-Noise Ratio (VNR). A new multi-echo MRV sequence is proposed as a compromise between VNR, total measurement time, spatial resolution and displacement errors. For improved VNR, a dual-VENC encoding scheme was used with different velocity encoding steps for the individual echoes. The repetition time TR was optimised to achieve a further VNR improvement. The proposed MRV sequence was implemented on a 7 Tesla preclinical Magnetic Resonance Imaging (MRI) system and used to measure the three-directional flow velocity of water in an Open Cell Foam (OCF) structure and a honeycomb structure with three-dimensional isotropic spatial resolution. The velocity measurements performed for the OCF structure were used for cross-validation with Computional Fluid Dynamics (CFD) simulations. A technique is described to match MRV and CFD velocity maps and their agreement was evaluated by a similarity index. The influence of different artefacts on the similarity index is evaluated in detail. To better understand the origin of different artefacts, the surface and the inside of the OCF structure were analysed separately.

Optimizing NMR Methods for Structure Elucidation

2018-09-26 Science
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Release : 2018-09-26
Genre : Science
Kind : eBook
Book Rating : 355/5 ( reviews)

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Book Synopsis Optimizing NMR Methods for Structure Elucidation by : Darcy C Burns

Download or read book Optimizing NMR Methods for Structure Elucidation written by Darcy C Burns. This book was released on 2018-09-26. Available in PDF, EPUB and Kindle. Book excerpt: This book is aimed at informing organic chemists and natural products chemists on the use of NMR for structure elucidation to enable them to ensure they yield the most reliable possible data in the minimum possible time. It covers the latest pulse sequences, acquisition and processing methods, practical areas not covered in most texts e.g. detailed consideration of the relative advantages and disadvantages of different pulse sequences, choosing acquisition and processing parameters to get the best possible data in the least possible time, pitfalls to avoid and how to minimize the risks of getting wrong structures. Useful in industrial, pharma or research environments, this reference book is for anyone involved with organic chemistry research and, in particular, natural products research requiring advice for getting the best results from the NMR facilities.

Methods for Structure Elucidation by High-Resolution NMR

1997-12-04 Science
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Release : 1997-12-04
Genre : Science
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Book Rating : 506/5 ( reviews)

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Book Synopsis Methods for Structure Elucidation by High-Resolution NMR by : G. Batta

Download or read book Methods for Structure Elucidation by High-Resolution NMR written by G. Batta. This book was released on 1997-12-04. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear Magnetic Resonance Spectroscopy (NMR) is now widely regarded as having evolved into a subscience. The field has become immensely diverse, ranging from medical use through solid state NMR to liquid state applications, with countless books and scientific journals devoted to these topics. Theoretical as well as experimental advance continues to be rapid, and has in fact accelerated by many novel innovations. This multi-authored book focuses on the latest developments in the rapidly evolving field of high resolution NMR, specifically with a view to applications on the structure elucidation of organic molecules of moderate molecular weight. Conceptually it differs from basic educational texts, hard-core scientific papers and regular review articles in that each chapter may be regarded as the authors' personal account of their special insights and results that crystallised after several years of research into a given topic. The book revolves around several themes and offers a handful of scientific "gems" of various colors, reflecting the great diversity of NMR. It contains 16 loosely connected chapters written by some of today's most accomplished NMR scientists in the world. Each chapter is a unique synthesis of the authors' previous research results in the given field, and thus projects special insights. Much emphasis has been given to the latest developments in NMR, in particular to selective pulses and pulsed field gradients. As a part of the series "Analytical Spectroscopy Library", with subsequent editions coming along this book should provide a platform for future research accounts of similar flavor. The material is presented in a mostly non-mathematical fashion, and is intended mainly for chemists, application NMR scientists and students with already some background in NMR. Some of the chapters slightly overlap in the discussed topics, which is particularly exciting in terms of gaining insight into the same area from different angles.

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