Mass spectrometry has developed into a platform for the assessment of health, sensory, quality and safety aspects of food. Current nutrition research focuses on unravelling the link between acute or chronic dietary and nutrient intake and the physiological effects at cellular, tissue and whole body level. The bioavailability and bioefficacy of food constituents and dose-effect correlations are key to understanding the impact of food on defined health outcomes. To generate this information, appropriate analytical tools are required to identify and quantify minute amounts of individual compounds in highly complex matrices (such as food or biological fluids) and to monitor molecular changes in the body in a highly specific and sensitive manner. Mass spectrometry has become the method of choice for such work and now has broad applications throughout all areas of nutrition research. This book focuses the contribution of mass spectrometry to the advancement of nutrition research. Aimed at students, teachers and researchers, it provides a link between nutrition and analytical biochemistry. It guides nutritionists to the appropriate techniques for their work and introduces analytical biochemists to new fields of application in nutrition and health. The first part of the book is dedicated to the assessment of macro- and micro-nutrient status with a view to making dietary recommendations for the treatment of diet-related diseases. The second part shows how mass spectrometry has changed nutrition research in fields like energy metabolism, body composition, protein turnover, immune modulation and cardiovascular health.

Photoemission spectroscopy is one of the most extensively used methods to study the electronic structure of atoms, molecules, and solids and their surfaces. This volume introduces and surveys the field at highest energy and momentum resolutions allowing for a new range of applications, in particular for studies of high temperature superconductors.

Analytical techniques based on separation processes, such as chromatography and electrophoresis, are finding a growing range of applications in chemical, pharmaceutical and clinical laboratories. The Wiley Separation Science Series provides the analyst in these laboratories with well-focused books covering individual techniques, so that they can be applied more efficiently and effectively to contemporary analytical problems. The different enantiomers of a drug can exhibit widely different physiological activity in degree and nature. As a result, the separation and identification of enantiomers is now a very important analytical problem and chiral chromatography is the natural technique to apply to the resolution of such mixtures. Chiral Chromatography provides the reader with a basic understanding of the nature of chromatographic separations and relates the principles specifically to the separation of enantiomers. The following information is included:

• chiral separations involving both gas and liquid chromatography
• descriptions of the apparatus used for both techniques
• detailed discussion on the retention mechanism that results in chiral selectivity
• the structure and synthesis of a wide range of chirally active stationary phases used in both gas and liquid chromatography
• preparative applications for large scale purification of enantiomers
• applications of capillary electrophoresis and capillary electrochromatography.

In view of the rapid growth in both experimental and theoretical studies of multi-photon processes and multi-photon spectroscopy of atoms, ions, and molecules in chemistry, physics, biology and materials science, it is timely to publish an advanced series that contains review papers readable not only by active researchers in these areas, but also by those who are non-experts but who wish to enter the field. This present volume attempts to serve this purpose. Each chapter is written in a self-contained manner by experts in their own area of expertise so that general readers can grasp the knowledge in that area without too much preparation.

The manner in which polymers are linked, under certain conditions, forms the main focus of this work. Spectroscopy has, over the years, proved itself to be the technique in providing information at molecular levels for many polymer systems. This book provides an overview of the current state-of-the-art through contributions by world-renowned experts. Techniques covered include: ?1H and ?13C NMR; NMR Imaging, Solid State NMR, Infra Red and Raman spectroscopy, ESR, light and neutron scattering. The book will be invaluable to post graduate students of polymer science and researchers using any one of the many spectroscopic techniques.

In recent years, no other technique has gained such significance as NMR spectroscopy. It is used in all branches of science in which precise structural determination is required and in which the nature of interactions and reactions in solution is being studied. Annual Reports on NMR Spectroscopy has established itself as a premier means for the specialist and non-specialist alike to become familiar with new techniques and applications of NMR spectroscopy.

* Provides updates on the latest developments in NMR spectroscopy * Includes comprehensive review articles * Highlights the increasing importance of NMR spectroscopy as a technique for structural determination

For more than four decades, scientists and researchers have relied on the Advances in Chromatography Series for the most up-to-date information on a wide range of developments in chromatographic methods and applications. With contributions from an array of international experts, the latest volume captures new developments in this important field that yields great possibilities in a number of applications. The authors? clear presentation of topics and vivid illustrations make the material in Volume 48 accessible and engaging to biochemists and analytical, organic, polymer, and pharmaceutical chemists at all levels of technical skill.

Topics covered in this new edition include:

• The retention mechanism in reversed-phase liquid chromatography (RPLC)
• Thermodynamic modeling of chromatographic separation
• Ultra-performance liquid chromatography (ULPC)
• Biointeraction affinity chromatography
• The characterization of stationary phases in supercritical fluid chromatography with the salvation parameter model
• Silica-hydride chemistry
• Multi-dimensional gas chromatography
• Sample preparation for chromatographic analysis of environmental samples and solid-phase microextraction (SPME) with derivatization

Covering the state of the art in separation science, this volume presents timely, cutting-edge reviews on chromatography in the fields of bio-, analytical, organic, polymer, and pharmaceutical chemistry. The information contained in this latest volume will help fuel further research in this burgeoning field across the full spectrum of related disciplines.

This edited volume provides an extensive overview of how nuclear magnetic resonance can be an indispensable tool to investigate molecular ordering, phase structure, and dynamics in complex anisotropic phases formed by liquid crystalline materials. The chapters, written by prominent scientists in their field of expertise, provide a state-of-the-art scene of developments in liquid crystal research. The fantastic assortment of shape anisotropy in organic molecules leads to the discoveries of interesting new soft materials made at a rapid rate which not only inject impetus to address the fundamental physical and chemical phenomena, but also the potential applications in memory, sensor and display devices. The review volume also covers topics ranging from solute studies of molecules in nematics and biologically ordered fluids to theoretical approaches in treating elastic and viscous properties of liquid crystals. This volume is aimed at graduate students, novices and experts alike, and provides an excellent reference material for readers interested in the liquid crystal research. It is, indeed, a reference book for every science library to have.

The porphyrins, chlorophylls, bilins and related tetrapyrroles are vital for all living organisms. Natural and synthetic tetrapyrroles are used extensively in foods, cosmetics, biotechnology, pharmaceuticals, diagnostics and medicine. Methods for their separation and characterization therefore, have a very wide area of applications. Yet, there is a dearth of books dedicated to HPLC and HPLC/MS of tetrapyrroles. Lim addresses this problem admirably by providing practical HPLC and HPLC/MS protocols coupled with in-depth chromatographic and mass spectrometric reference data. These are invaluable in the analysis, identification and characterization of porphyrins, chlorophylls, bilins and other related compounds found in biological and clinical materials. HPLC method development and optimization for coupling to mass spectrometry are also described in rich detail. Sample preparation, and suggestions for avoiding procedural artifacts during extraction of clinical and biological samples are discussed. Clinical biochemists involved in biochemical diagnosis of human porphyrias will find this monograph assuredly helpful, as would analysts, biochemists and chemists involved in the separation, isolation and characterization of natural and synthetic tetrapyrroles. Undoubtedly, Lim has contributed a master-piece containing sufficient background material for beginners and up-to-date references for all researchers in the field.

Nuclear magnetic resonance (NMR) is an analytical tool used by chemists and physicists to study the structure and dynamics of molecules. In recent years, no other technique has gained such significance as NMR spectroscopy. It is used in all branches of science in which precise structural determination is required and in which the nature of interactions and reactions in solution is being studied. "Annual Reports on NMR Spectroscopy" has established itself as a premier means for the specialist and non-specialist alike to become familiar with new techniques and applications of NMR spectroscopy.

* Provides updates on the latest developments in NMR spectroscopy * Includes comprehensive review articles * Highlights the increasing importance of NMR spectroscopy as a technique for structural determination

The book reviews the basic concepts and highlights the most relevant advances and developments that have taken place in the field of comprehensive two dimensional gas chromatography (GC x GC) since its introduction in 1991. The several instrumental and technical approaches assayed and developed during these seventeen years and that have contributed to the development of this powerful separation technique and to its increasing application in many areas is explained and comprehensively illustrated through a number of chapters devoted these specific topics. More specialized aspects of the technique, including theoretical aspects, modelization of the chromatographic process, software developments, and alternative couplings is also covered. Finally, special attention is paid to data treatment, for both qualitative and quantitative analysis. This book will be a practical resource that will explain from basic to specialized concepts of GC x GC and will show the current state-of-the-art and discuss future trends of this technique.
-Outlines basic concepts and principles of GCxGC technique for non-specialists to apply the technique to their research;
-Provides detailed descriptions of recent technical advances and serves as an instructional guide in latest applications in GCxGC;
-Sets the scene for possible future development and alternative new applications of technique.

A blend of theory and practical advice, Modern NMR Techniques for Synthetic Chemistry illustrates how NMR spectroscopy can be used to determine the abundance, size, shape, and function of organic molecules. It provides you with a description the NMR technique used (more pictorial than mathematical), indicating the most common pulse sequences, some practical information as appropriate, followed by illustrative examples. This format is followed for each chapter so you can skip the more theoretical details if the practical aspects are what interest you. Following a discussion of basic parameters, the book describes the utility of NMR in detecting and quantifying dynamic processes, with particular emphasis on the usefulness of saturation-transfer (STD) techniques. It details pulsed-field gradient approaches to diffusion measurement, diffusion models, and approaches to 'inorganic' nuclei detection, important as many synthetic pathways to new organics involve heavier elements. The text concludes with coverage of applications of NMR to the analysis of complex mixtures, natural products, carbohydrates, and nucleic acids-all areas of activity for researchers working at the chemistry-life sciences interface. The book's unique format provides some theoretical insight into the NMR technique used, indicating the most common pulse sequences. The book draws upon several NMR methods that are resurging or currently hot in the field and indicates the specific pulse sequence used by various spectrometer manufacturers for each technique. It examines the analysis of complex mixtures, a feature not found in most books on this topic.

This book addresses the development of electronic devices using redox-active organic molecules and their porous coordination networks (PCNs), and highlights the importance of the molecular arrangement. Redox-active organic molecules hold considerable promise as flexible electronic elements, because their electronic state can easily be controlled using external energy. Although various kinds of redox-active organic molecules have been synthesized, attempts to apply them to electronic devices have been limited, owing to the lack of proper structural design. Moreover, ligand-based redox-active PCNs remain largely unexplored because of the limited availability of redox-active ligands. In addition to developing new redox-active organic molecules, in order to design electronic devices based on these molecules/PCNs, it is essential to understand the connections between their molecular arrangement, electrical properties, and redox activity. In this thesis, the redox-active organic molecule 2,5,8-tri(4-pyridyl)1,3-diazaphenalene (TPDAP), which features a large pi plane and multi-intermolecular interactivity, is used to develop a resistive switching memory device. In addition, its PCNs are synthesized to fabricate chemiresistive sensors, and the electrical properties are modulated using post-synthetic modification. Each mechanism is systematically investigated by means of structural determination and well-defined control experiments. Subsequently, the book proposes general guidelines for designing electronic devices using redox-active organic molecules. The book will appeal to a broad range of readers, from basic scientists to materials engineers, as well as general, non-expert readers.

The 9/11 attack on US soil has inadvertently heightened the need for preparation for other potential means of terrorist attack. In particular, both biological and chemical warfare have been at the top of the priority list for most governmental agencies as these reagents can be covertly prepared and disseminated to result in both widespread fear and casualty. Among many others, one primary preventive step in preparing for the above attacks is to establish a network for efficient surveillance and rapid detection such that an appropriate response to such attacks can be timely and effective. Over the years, primarily due to technological advances, both chemical and biological agents that are able to inflict mass destructions are becoming more diverse and complex. Subsequently, improvement of sensing devices for rapid and sensitive detection should also be made to keep pace with these engineered or emerging threat agents. Of particular interest, the ability to encompass advances in micro and nanofabrication techniques to enable sensing devices are especially of interest as they have been shown to offer desired advantages such as improved and enhanced functionality, increased efficiency and speed in their readout, reduction in their fabrication cost, and also reduced reagent consumption. Numerous innovative and exciting reports which took advantage of these techniques for both chemical and biological sensing have appeared over the last decade. This unique book is the only current publication that provides readers with a brief, yet concise, collection of the latest advances in chemical and biological agent detection and/or their surveillance. It compiles and gives in-depth detail on several detection schemes so that the reader can be provided with a general sense of these micro and nanoscale sensing systems and platforms. The book covers both well established and "next-generation" micro- and nano-scale sensors and/or sensing platforms. Sensors or sensing platforms covered range from the novel utilization of nanotubes, cantilevers, nano and/or microsized pores, engineered whole cell, to polymeric transistors for sensing purposes. As a result of these advances there has been a synergistic marriage of a myriad of techniques, ranging from chemical, engineering and biological, for the development of sensors, which was once traditionally thought to be reserved for the immunologists. The enabling of these new technologies will result in a much improved sensing network for the detection and surveillance of both chemical and biological warfare agents.The book also contains chapters from leading experts in the field of chemical and biological sensing platforms and will be invaluable reading for anybody in this field.

This book surveys recent advances related to the application of single molecule techniques in various fields of science. The topics, each described by leading experts in the field, range from single molecule experiments in quantum optics and solid-state physics to analogous investigations in physical chemistry and biophysics. A unifying theme of all chapters is the power of single molecule techniques to unravel fluctuations and heterogeneities usually hidden in the ensemble average of complex systems. The concept for the book originated from a gathering of some of the world's leading scientists at the Nobel Conference in Sweden.

The term magnetic resonance covers a wide range of techniques, spectroscopy, relaxation and imaging. In turn, these areas are evolving and leading to various new applications of NMR and ESR in food science and nutrition. This book is part of the continuing series of proceedings of the biennial conferences on applications of magnetic resonance to food science. As always, the aim of the book is to bring the reader up-to-date with the state-of-the-art of the subject. The speakers came from Europe, North and South America, Asia and Australasia giving a global perspective to the event. The range of the conference was broad covering sensory science, authenticity, functionality, solid state methods and new methods. Magnetic Resonance in Food Science is a global survey written by leading authorities. It provides readers with an awareness of current activity in the field and potential applications.

This book provides a thorough account of the current status of achievements made in the area of soft X-Ray laser source development and of the increasingly diverse applications being demonstrated using such radiation sources. There is significant effort worldwide to develop very bright, short duration radiation sources in the X-Ray spectral region - driven by the multitude of potential applications in all branches of science. This book contains updates on several different approaches for comparative purposes but concentrates on developments in the area of laser-produced plasmas, whereby transient population inversion and gain between ion states is pumped by optical lasers interacting with pre-formed plasmas. Topics covered will include Laser-driven XRLs, Collisional XRLs, Recombination XRLs, Transient Inversion Collisional XRLs, Optical Field Ionization XRLs, Alternative XRL, pumping schemes Theory and simulations of XRL gain media and beam properties High order harmonic sources of XUV radiation, Free-electron lasers and other accelerator based X-Ray sources, X-Ray Laser drives, X-Ray optics and instrumentation Spectroscopy, and other diagnostics of laser media Applications of XRLs.

This volume, which addresses various basic sensor principles, covers micro gravimetric sensors, semiconducting and nano tube sensors, calorimetric sensors and optical sensors. Furthermore, the authors discuss recent developments in the related sensitive layers including new properties of nano structured metal oxide layers. They provide in-depth insights into the unique chemistry and signal generation of copper oxide in percolating sensors and present a variety of applications of functional polymers made possible by proper imprinting.

Highlights of the subjects covered include:

requirements for high-temperature sensors

carbon nano tube sensors

new sensing model for nanostructured In2O3

bio mimetic approach for semiconductor sensor-based systems

optical readout for inorganic and organic semiconductor sensors

concept of virtual multisensors to improve specificity and selectivity

calorimetric sensors for hydrogen peroxide detection

percolation effect-based sensors to implement dosimeters

imprinted polymer layers for bulk and surface acoustic wave sensors"

Protein folding and aggregation is the process by which newly synthesized proteins fold into the specific three-dimensional structures defining their biologically active states. It has always been a major focus of research in biochemistry and has often been seen as the unsolved second part of the genetic code. In the last 10 years we have witnessed a quantum leap in the research in this exciting area. Computational methods have improved to the extent of making possible to simulate the complete folding process of small proteins and the early stages of protein aggregation. Experimental methods have evolved to permit resolving fast processes of folding reactions and visualizing single molecules during folding. The findings from these novel experiments and detailed computer simulations have confirmed the main predictions of analytical theory of protein folding. In summary, protein folding research has finally acquired the status of a truly quantitative science, paving the way for more exciting developments in the near future. This unique book covers all the modern approaches and the many advances experienced in the field during the last 10 years. There is also much emphasis on computational methods and studies of protein aggregation which have really flourished in the last decade. It includes chapters in the areas that have witnessed major developments and are written by top experts including:computer simulations of folding, fast folding, single molecule spectroscopy, protein design, aggregation studies (both computational and experimental). Readers will obtain a unique perspective of the problems faced in the biophysical study of protein conformational behaviour in aqueous solution and how these problems are being solved with a multidisciplinary approach that combines theory, experiment and computer simulations. Protein Folding, Misfolding and Aggregation Classical Themes and Novel Approaches is essential reading for graduate students actively involved in protein folding research, other scientists interested in the recent progress of the field and instructors revamping the protein folding section of their biochemistry and biophysics courses.

The great importance of NMR in many areas of scientific research is once again highlighted in this volume of Annual Reports on NMR Spectroscopy. The first chapter by J.A. Tossell (University of Maryland, USA) is on "Theoretical and Experimental Studies on 19F NMR Shieldings in Mineral Glasses, Zeolites and Related Silsequioxanes." J.T. Gerig (University of California at Santa Barbara, USA) reports on "NOE Studies of Solvent-Solute Interactions." A state-of-the-art account of "DFT Computations of Transition Metal Chemical Shifts" is given by Michael Buehl, Max Plank Institute, Muelheim an der Ruhr, Germany. This is followed by a contribution from Daniel Huster, Martin Luther University Halle-Wittemberg, Germany on "Solid-State NMR Studies of Collagen Structure and Dynamics in Isolated Fibrils and in Biological Tissues."
J. Kidric, National Institute of Chemistry, Ljubljana, Slovenia reports on "NMR Studies of Beverage" and this is followed by a "Contribution of NMR Spectroscopy to Flavour Release and Perception" by L. Tavel, E. Guichard and C. Moreau, INRA, Dijon, France. The final chapter is by Jeffrey L. White (Oklahoma State University, Stillwater, USA) on "Polymer Blend Miscibility."
* Provides updates on the latest developments in NMR spectroscopy
* Includes comprehensive review articles
* Highlights the increasing importance of NMR spectroscopy as a technique for structural determination

This book describes the most important high-resolution NMR techniques that find use in the structure elucidation of organic molecules and the investigation of their behavior in solution.
The techniques are presented and explained using pictorial formats wherever possible, limiting the number of mathematical descriptions. The emphasis is on the more recently developed methods of solution-state NMR spectroscopy with a considerable amount of information on implementation and on the setting of critical parameters for anyone wishing to exploit these methods.

* Presents a large number of examples to demonstrate the utility of the methods covered
* Serves the needs of students and professionals in every chemistry laboratory
* Describes the most important methods available, with guidance on execution of experiments

Atomic Absorption Spectroscopy (AAS) is a well-established elemental analysis technology. It remains one of the most popular and cost-effective analysis tools used by chemists, physicists, and materials scientists worldwide. This second edition offers a concise introduction to AAS concepts, essential methodologies, and important applications. It has been comprehensively updated for the latest advances in AAS techniques and instruments. Highlights include: - Overviews of all basic atomic absorption concepts, including atomic line spectra theory, common sampling techniques, radiation sources, spectrometers, and detectors; - Coverage of hydride generation, cold vapor generation and electrothermal generation, as well as flow injection analysis (FIA) to enhance AAS analytical performance; - New sections on troubleshooting and quality control guidelines, chemometrics, and emerging fields of applications, including analysis of nanoparticles; and - Selected examples of standards for chemical analysis.

This book collects all the latest advances in the leading research of the circularly polarized luminescence (CPL) of small organic molecules. Compared with that of lanthanide-based fluorophores, the research into the CPL of small organic molecules is still at the developmental stage for their relatively smaller dissymmetric factors, but has been a source of widespread attention recently. The book includes the state of the art of the discoveries in CPL organic molecules, such as helicenes, biaryls, cyclophanes, boron dipyrromethene dyes, and other chiral molecules, mostly in their isolated states, covering all possible chiral substances for future applications. This book also highlights the recent development of CPL instruments as well as time-resolved circular dichroism spectroscopy, to facilitate the further development and future design of CPL molecules.

This is a comprehensive and authoritative treatise on all aspects of the theory, instrumentation and practical usefulness of electrothermal atomic absorption spectrometry (ETAAS) and associated techniques. This book reflects the significant changes that have taken place in this popular technique for the accurate determination of metals at ultratrace concentrations in a wide variety of sample types.
This book provides coverage of:
* The evolution of ETAAS
* Heating characteristics of graphite furnace atomizers
* Detailed descriptions of modern instrumentation
* The use of chemical modifiers
* Atomization from solids and slurries
* Other specialized techniques using electrothermal atomizers
* Extensive cross-referencing between chapters
Comprehensive coverage combined with a descriptive style make this a key resource for graduate students in analytical chemistry, researchers in analytical atomic spectrometry and analysts who routinely use ETAAS.

This concise and carefully developed text offers a reader friendly guide to the basics of time-resolved spectroscopy with an emphasis on experimental implementation. The authors carefully explain and relate for the reader how measurements are connected to the core physical principles. They use the time-dependent wave packet as a building block for understanding quantum dynamics, progressively advancing to more complex topics. The topics are discussed in paired sections, one discussing the theory and the next presenting the related experimental methods. A wide range of readers including students and newcomers to the field will gain a clear and practical understanding of how to measure aspects of molecular dynamics such as wave packet motion, intramolecular vibrational relaxation, and electron-electron coupling, and how to describe such measurements mathematically.