Download or read book Solid State Nuclear Magnetic Resonance of Fossil Fuels written by David E. Axelson and published by . This book was released on 1985 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid State Nuclear Magnetic Resonance of Fossil Fuels an Experimental Approach written by and published by . This book was released on 1985 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Resonance written by Leonidas Petrakis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the lectures presented at an Advanced Study Institute on "Magnetic Resonance Techniques in Fossil Energy Problems," which was held at the village of Maleme, Crete, in July of 1983. As of this writing, a different popular attitude prevails from that when the ASI was proposed as far as how critical the world energy picture is. In the popular press, a panglossian attitude (the "petroleum glut" of the 80's) has replaced the jeremiads of the 70's ( a catastrophic "energy crisis"). Yet, there are certain important constants: (a) for the foreseeable future, fossil energy sources (petroleum, coal, oil shale, etc. ) will continue to be of paramount importance; and (b) science and technology of the highest order are needed to extend the fossil ener~y resource base and to utilize it in a cost-effective manner that is also environmentally acceptable. It is precisely this second item that this volume addresses. The volume introduces the phenomenology of magnetic resonance ~n a unified and detailed manner, starting from the behavior of spins in a magnetic field and proceeding to a density matrix consideration of the phenomena involved. The various important parameters of NMR and EPR are discussed in detail, as well as their significance and the information that may be obtained from their proper consideration. Advanced topics are then considered, including line-broadening interactions, coherent averaging and multiple quantum methods in NMR, ENDOR, electron spin echoes, dynamic nuclear polarization. problems of quantifi cation, 2-Dimensional N}1R, Mossbauer, and instrumentation.
Download or read book Solid State Nuclear Magnetic Resonance written by David E. Axelson and published by CreateSpace. This book was released on 2012-03-29 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid state nuclear magnetic resonance now offers a wide variety of methods for characterization of materials of different compositions over a wide range of experimental conditions (temperatures, pressures, etc.) Both simple and sophisticated pulse sequences enable one to selectively probe and quantify physical properties of interest. This book mainly dwells on the practical aspects of selected topics and uses a largely non-mathematical, although extensively referenced, approach to the introduction of solid state NMR concepts. Chapter 1 : Principles of Solid State NMRChapter 2 : Introduction to Pulse SequencesChapter 3 : DecouplingChapter 4 : Quantitative AnalysisChapter 5 : ArtifactsChapter 6 : Line Broadening MechanismsChapter 7 : Resolution EnhancementChapter 8 : Variable Temperature
Download or read book Nuclear Magnetic Resonance written by G A Webb and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine. Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.
Download or read book Magnetic Resonance of Carbonaceous Solids written by Robert E. Botto and published by . This book was released on 1993 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed chapters discuss the new magnetic resonance methods for characterizing carbonaceous fuels. Measurements described in the text were made from the same set of Argonne Premium coal samples, so different techniques can be compared with high credibility. A number of nuclear magnetic resonance and electron paramagnetic resonance techniques and results are presented, including solid state NMR spectroscopy and new pulsed EPR techniques. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Nuclear Magnetic Resonance in Modern Technology written by G.E. Maciel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the primary lectures of the NATO Advanced Study Institute (ASI) on "Nuclear Magnetic Resonance in Modern Technology," which was held at Sarigerme Park (near the Dalaman Airport) on the southern Aegean shore of Turkey from August 23 to September 4, 1992. As indicated in the title, this ASI was aimed at examining, displaying, and perhaps influencing, the role of nuclear magnetic resonance (NMR) in modern technological activity. The lectures summarized in this volume and the numerous short contributed talks and posters were primarily aimed at the question, "What is NMR doing in support of modern technology?" During the main discussion periods and the numerous small scheduled meetings of specific interest groups this same topic was also addressed, along with questions like, "What could or should NMR be doing in support of modern technology?" With this kind of subject orientation, the organizers attempted to include a large participation at the ASI from scientists and engineers from diverse private industries in which NMR does, or perhaps should, play a substantial role in supporting or optimizing technology. Perhaps because of a combination of worldwide industrial contractions and residual corporate nervousness regarding the then recent Gulf War (which caused a one-year postponement of this ASI), the participation from private industry was numerically disappointing. We hope that this book will serve to bring the role of NMR in modern industry to the attention of numerous industrial scientists and engineers who were unable to attend the AS!.
Download or read book A High Field Solid state Nuclear Magnetic Resonance Experimental Study for Clay and Shale Swelling written by Mohammed S. Alzahrani and published by . This book was released on 2013 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Humic Substances written by Robert L. Wershaw and published by CRC Press. This book was released on 2020-11-25 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction and guide to the use of nuclear magnetic resonance (NMR) spectroscopy for the study of humic materials and coals. It provides a general discussion of the application of liquid-state and solid-state NMR techniques.
Download or read book Advances in Coal Spectroscopy written by Henk Meuzelaar and published by Springer Science & Business Media. This book was released on 2013-12-14 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has witnessed major advances in our understanding of the chemical composition, structure, and reactivity of the complex organic-rich fossil matter known as "coal. " Nevertheless, important scientific questions concerning molecular weight distributions, degree of crosslinking, typical duster sizes, type of interconnecting bridges, the possible role of a "mobile phase," and the nature of organic sulfur forms remain topics of heated debate. Moreover, there appears to be a notable lack of consensus regarding the overall direction and goals of structural elucidation work. Is it worthwhile to study whole coal samples, or should we separate out the various, more or less well-defined, maceral and mineral constituents before attempting to describe the structural and compositional features of coal at the molecular Ievel? Second, should there be more emphasis on key structural features and average statistical parameters, or is it necessary to identify individual chemical structures in considerable detail? From the developments of the past decade it is clear that advanced spectroscopic techniques are playing an increasingly important role in resolving difficult questions with regard to the chemical structure and composition of coal. Moreover, it has become equally clear that no single spectroscopic approach can provide all the answers but multiple techniques need to be used in a highly integrated and synergistic manner.
Download or read book NMR Spectroscopy written by Myrna J. Simpson and published by John Wiley & Sons. This book was released on 2014-06-12 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: The challenges faced by environmental scientists today are vast, complex, and multi-faceted. For instance, predicting the fate of an environmental pollutant or understanding ecosystem responses to climate change, necessitate a firm understanding of molecular structure and dynamics of environmental media as well as the components that exist and interact within this media. Furthermore, linking information obtained at the molecular-scale to ecosystem-level processes is a major pursuit of modern environmental research. As such, NMR spectroscopy and its scalability from the molecular-scale to the macroscopic-scale, is facilitating rapid growth in environmental science. In addition, the versatility of NMR spectroscopy has resulted in the development and implementation of different types of NMR techniques to examine the structure of various types of environmental samples, living and non-living, as well as the study of critical environmental processes. This comprehensive handbook is a collection of chapters that span from methods to how NMR is used in environmental research to gain insight into various ecosystem properties. It is organized into three parts: Part A focuses on methods used in environmental NMR which span from solution-state to magnetic resonance imaging. Part B emphasizes how NMR spectroscopy plays an essential role in understanding various types of environmental components and related processes, including different forms of organic matter found in soil, water, and air as well as how NMR is used to probe the fate of water, organic pollutants, and metals in the environment. Part C focuses on the growing field of environmental metabolomics which uses NMR as its main discovery platform. This volume highlights the immense potential of NMR spectroscopy to expand our fundamental understanding of environmental processes and how it will continue to do so well into the future. About eMagRes Handbooks eMagRes (formerly the Encyclopedia of Magnetic Resonance) publishes a wide range of online articles on all aspects of magnetic resonance in physics, chemistry, biology and medicine. The existence of this large number of articles, written by experts in various fields, is enabling the publication of a series of eMagRes Handbooks on specific areas of NMR and MRI. The chapters of each of these handbooks will comprise a carefully chosen selection of eMagRes articles. In consultation with the eMagRes Editorial Board, the eMagRes handbooks are coherently planned in advance by specially-selected Editors, and new articles are written to give appropriate complete coverage. The handbooks are intended to be of value and interest to research students, postdoctoral fellows and other researchers learning about the scientific area in question and undertaking relevant experiments, whether in academia or industry. Have the content of this handbook and the complete content of eMagRes at your fingertips! Visit: www.wileyonlinelibrary.com/ref/eMagRes
Download or read book Nuclear Magnetic Resonance written by and published by . This book was released on 1987 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Trends in Coal Science written by Yuda Yürüm and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the lectures presented at the Advanced Study Institute on "New Trends in Coal Science" which was held at Datca, HUgla, Turkey during August 23 - September 4, 1987. The book includes 23 chapters which were originally written for the meeting by some of the world's foremost investigators. Chemists everywhere are carrying out exciting research that has important implications for the energy and fuels industries and for society in general. For the near future, coal resources will continue to be of great importance and science and technology of the highest order are needed to extend this fossil energy resource and to utilize it in an economical way that is also environmentally acceptable. These were the main purposes for the organization of this NATO ASI. The Institute constituted two working weeks on structure and reactivity of coal and so is the book. Through the presentation of many specific recent results on structure and characterization of coal and its products the potential of new instrumental techniques is presented in the first part of the book. Finally the reactivity of coals at different conditions both in laboratory and industry is discussed. We hope that the volume will be of great use to research workers from academic and industrial background. In addition it could serve as a textbook for a graduate course on coal science and technology.
Download or read book Solid State Nuclear Magnetic Resonance of Paramagnetic Metal Organic and Inorganic Systems written by Shashi Kumar Kumara Swamy and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis aims at developing techniques in solid state nuclear magnetic resonance (ssNMR) of paramagnetic metal-organic and inorganic systems in combination with electron paramagnetic resonance (EPR) spectroscopy and quantum chemical methods such as density functional theory (DFT).Solid state NMR signals of paramagnetic systems suffer from severe loss of sensitivity and resolution due to large hyperfine interactions. Among all the interactions seen in ssNMR, the interaction between the unpaired electron(s) and the observed nucleus leading to hyperfine interaction in paramagnetic solids is large in magnitude. Large broadening due to fast relaxation in paramagnetic systems on the one hand limits the excitation of the nuclei using conventional probes thereby causing severe loss in sensitivity and resolution of ssNMR signals. On the other hand the large shifts due to Fermi-contact interaction mask the diamagnetic chemical shifts (which are rich source of chemical group information) and make signal assignment difficult. The conventional techniques developed for solid state NMR of diamagnetic systems are inefficient for paramagnetic systems. These factors have led ssNMR of paramagnetic systems to be an unexplored topic for decades.Recently Ishii and co-workers have circumvented some of these problems using very-fast magic angle spinning (VFMAS).1 Spinning the sample at MAS frequencies >30 kHz drastically enhances the sensitivity and resolution of ssNMR signals in paramagnetic complexes. We have used the VFMAS approach and have shown how to cope with moderate hyperfine interactions in ssNMR of organic (cyclam and acetylacetonate) and inorganic (alkaline-copper pyrophosphates) systems with transition metal ions such as CuII, NiII and VIV as paramagnetic center. On the one hand Fermi-contact interaction which is responsible for large shifts up to 100 ppm in 1H and 1000 ppm in 13C and 31P cause severe problems for signal assignment. But on the other hand it also leads to better spectral dispersion and hence improve the resolution of the ssNMR signals. We were able to exploit this idea and a well resolved 13C and even 1H solid state NMR spectrum in paramagnetic metal-organic systems was obtained using a simple Hahn-echo experiment. This is usually not possible, since 1H NMR in diamagnetic solids suffer from large broadening of 100 kHz due to 1H-1H homonuclear dipolar coupling. Furthermore fast relaxation in paramagnetic systems allows one to reduce the interscan delay and thereby repeat the experiments several times in a given time and improve the signal to noise ratio. This compensates for loss in sensitivity more often due to fast relaxation in paramagnetic systems.Fermi-contact shifts are characteristics of unpaired electron spin density in a molecule. Using quantum chemical methods such as DFT one can calculate the theoretical Fermi-contact shifts.2 We have compared the experimental 13C ssNMR shifts with shifts from DFT calculation in paramagnetic metal -cyclam and -acetylacetonate complexes and have assigned the 13C signals. For assignment of 1H, a 2D version of dipolar INEPT (insensitive nuclei enhancement by polarization transfer) was used. In some cases such as the Cu-cyclam complex, a very well resolved 1H ssNMR spectrum motivated us to try 1H-1H homonuclear correlation experiment. We obtained several important cross peaks with a relatively simple pulse sequence. We used the dipolar connectivity information from it to complete the 1H assignment.One of the important aims of the thesis was to find a way to measure the metal-carbon distances using solid state NMR relaxation rates. In paramagnetic metal-organic complexes the carbon-13 relaxation caused by the dipolar interaction with the unpaired electron depends on the distance of the carbon atoms to the central metal ion, therefore its rates in principle contain structural information...
Download or read book Nuclear Magnetic Resonance written by A. E. Aliev and published by Royal Society of Chemistry. This book was released on 2002 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage.
Download or read book Spectroscopy of Rubbers and Rubbery Materials written by Victor M. Litvinov and published by iSmithers Rapra Publishing. This book was released on 2002 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the application of spectroscopic techniques for characterisation of chemical and physical structures in viscoelastic materials, such as unvulcanised elastomers and their vulcanisates, various rubbery materials and some plastics, which when blended with particular additives (plasticisers) behave like rubbers. Analysis of the rubbery materials is complicated by the fact that rubbery products, such as tyres, tubes, seals, V-belts and hoses, contain in the rubbery matrix a significant amount of various compounds, i.e., fillers, vulcanising agents, antioxidants and plasticisers. Due to the complex composition, no single technique can provide a good understanding of the effect of chemical and physical structures on the functional properties of rubbery materials. Thus spectroscopy has become a powerful tool for the determination of polymer structures. The most comprehensive information on chemical and physical structures in relation to material properties can be obtained by using a combination of macroscopic techniques and methods that provide information on the molecular level. frequently used for analysis of rubbery materials, i.e., various methods of nuclear magnetic resonance (NMR) and optical spectroscopy. The main objective of this present book is to discuss a wide range of applications of the spectroscopic techniques for the analysis of rubbery materials. The book brings together the various spectroscopic techniques for obtaining the following information: chemical structure of rubbery materials, network structure analysis, heterogeneity of rubbery materials, physical properties of rubbery materials, functional properties and stability of rubbery materials, processing of rubbery materials and quality control. The contents of this book are of interest to chemists, physicists, material scientists and technologists who seek a better understanding of rubbery materials.
Download or read book Information Report written by and published by . This book was released on 1985 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: