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Books > Science & Mathematics > Chemistry > Analytical chemistry
Nuclear Magnetic Resonance (NMR) is based on the fact that certain nuclei exhibit a magnetic moment, oriented by a magnetic field, and absorb characteristic frequencies in the radiofrequency part of the spectrum. The spectral lines of the nuclei are highly influenced by the chemical environment, i.e. the structure and interaction of the molecules. NMR is now the leading technique and a powerful tool for the investigation of the structure and interaction of molecules. The present Landolt-Bornstein volume III/35 "Nuclear Magnetic Resonance (NMR) Data" is therefore of major interest to all scientists and engineers who intend to use NMR to study the structure and the binding of molecules. Volume III/35 ''NMR-Data'' is divided into several subvolumes and parts. Subvolume III/35A contains the nuclei B-11 and P-31, subvolume III/35B contains the nuclei F-19 and N-15, subvolume III/35C contains the nucleus H-1, subvolume III/35D contains the nucleus C-13, subvolume III/35E contains the nucleus O-17, subvolume III/35F contains the nucleus Si-29, and subvolume III/35G contains the nucleus Se-77. More nuclei will be presented later.
This book provides a comprehensive summary of research to date in the field of stable iron isotope geochemistry. Since research began in this field 20 years ago, the field has grown to become one of the major research fields in "non-traditional" stable isotope geochemistry. This book reviews all aspects of the field, from low-temperature to high-temperature processes, biological processes, and cosmochemical processes. It provides a detailed history and state-of-the art summary about analytical methods to determine Fe-isotope ratios and discusses analytical and sample prospects.
This book discusses group theory investigations of zincblende and wurtzite semiconductors under symmetry-breaking conditions. The text presents the group theory elements required to develop a multitude of symmetry-breaking problems, giving scientists a fast track to bypass the need for recalculating electronic states. The text is not only a valuable resource for speeding up calculations but also illustrates the construction of effective Hamiltonians for a chosen set of electronic states in crystalline semiconductors. Since Hamiltonians have to be invariant under the transformations of the point group, the crystal symmetry determines the multiplet structure of these states in the presence of spin-orbit, crystal-field, or exchange interactions. Symmetry-breaking leads to additional coupling of the states, resulting in shifts and/or splittings of the multiplets. Such interactions may be intrinsic, as in the case of the quasi-particle dispersion, or extrinsic, induced by magnetic, electric, or strain fields. Using a power expansion of the perturbations these interaction terms can be determined in their parameterized form in a unique way. The hierarchic structure of this invariant development allows to estimate the importance of particular symmetry-breaking effects in the Hamiltonian. A number of selected experimental curves are included to illustrate the symmetry-based discussions, which are especially important in optical spectroscopy. This text is written for graduate students and researchers who want to understand and simulate experimental findings reflecting the fine structure of electronic or excitonic states in crystalline semiconductors.
This book demonstrates the usefulness of NMR spectroscopy for a wide variety of applications in environmental science and technology. The book contains a wealth of information relating to instrumentation, sample preparation, and data interpretation. It is divided into three sections discussing contaminant interaction, solution and condensed phase characterization, and nutrients and natural organic matter characterization. In addition to these in-depth chapters, an introductory overview provides the basic principles of solution and solid-state NMR spectroscopy. Each section also contains a discussion of advances in each area directly attributable to NMR spectroscopy. A final chapter suggests future directions for the deployment of this powerful technology in environmental science.
Surface plasmon resonance (SPR) has evolved into an exciting technique in biomolecular interaction analysis. The development of commercial SPR instruments has made the te- nique available to a wide scienti?c audience, and the number of publications in which the use of SPR is described is rapidly increasing. SPR is in use for many purposes from food quality control to the study of nanoparticles. Much research is now focused on devel- ing new SPR-related applications, e.g., SPR imaging, SPR arrays, SPR ?uorescence, and combinations of SPR with mass spectrometry and with electrochemistry. Biomolecular interaction analysis is at the core of many research projects. In principle, the setup of an SPR experiment is simple: There is a sensor surface to which one of the interacting partners (the ligand) is immobilized; the other partner (the analyte) is added in a ?ow or cell-like compartment. The binding phenomenon is monitored in real time as a change in SPR angle. An important issue is the choice of surface and the immobilization strategy. With SPR, it is possible to mimic the biological environment which is relevant for an interaction. For interactions in a water environment, sensor surfaces with hydrogels are available. Many biomolecular interactions take place in a membrane environment. For this, commercial sensor surfaces are available, or surfaces can be tailor-made. This volume contains several examples of building up of lipophilic surfaces. Nature abundantly makes use of multivalent interactions; multivalency can be mimicked on a sensor surface with immobilized ligands.
This first book on load-pull systems is intended for readers with a broad knowledge of high frequency transistor device characterization, nonlinear and linear microwave measurements, RF power amplifiers and transmitters. Load-Pull Techniques with Applications to Power Amplifier Design fulfills the demands of users, designers, and researchers both from industry and academia who have felt the need of a book on this topic. It presents a comprehensive reference spanning different load-pull measurement systems, waveform measurement and engineering systems, and associated calibration procedures for accurate large signal characterization. Besides, this book also provides in-depth practical considerations required in the realization and usage of load-pull and waveform engineering systems. In addition, it also provides procedure to design application specific load-pull setup and includes several case studies where the user can customize architecture of load-pull setups to meet any specific measurement requirements. Furthermore, the materials covered in this book can be part of a full semester graduate course on microwave device characterization and power amplifier design.
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.
This thesis describes a new approach for cell analysis by the rapid developing microfluidic technology. The nominee has made great contributions to develop a new analysis platform which combined microfluidic devices with mass spectrometry to determine the trace compounds secreted by cells. Based on this analysis platform, she studied the specific cell secreting behaviors under controlled microenvironment, of which the secretion compounds were qualified and semi-quantified by mass spectrometry. A novel cell sorting device integrated homogenous porous PDMS membrane was invented to classify cells from real samples based on the size difference. The nominee further studied the signal transmission between different cells, and the signal chemicals were qualitative and quantitative monitored by the analysis platform. This indicates the potential significant application of the new cell analysis platform in medicine screening and early diagnosis.
Crown ethers and calixarenes - the latter ones discovered only recently - are powerful complexing ligands for alkali and alkaline earth metals. This led to their immediate and wide-spread application in biosciences. This book is exclusively devoted to the very promising applications of these compounds in analytical chemistry. It focusses on solvent extraction, chromatography, spectroscopy and electroanalytical methods.
This book is devoted to the synthetic and physical chemistry of aromatic thiols and their closest derivatives, sulfides, sulfoxides, sulfones, including those substituted by various functional groups such as acyl and thioacyl, alkoxide, ester, hydroxyl and halogens. In some cases, for comparison, selenium and oxygen analogues are also detailed. The main focus of the book is on synthetic methods, both traditional and new, based on the use of transition metals as catalysts, as well as the reactivity of the compounds obtained. Its addition to the influence of conformational and electronic factors on spectral (NMR, IR, UV, NQR) and electrochemical characteristics of the compounds is presented. Finally, the book describes the application of aromatic thiols and their derivatives as drug precursors, high-tech materials, building blocks for organic synthesis, analytical reagents and additives for oils and fuels. It is a useful handbook for all those interested in organosulfur chemistry.
The Springer Handbook of Enzymes provides concise data on some 5,000 enzymes sufficiently well characterized - and here is the second, updated edition. Their application in analytical, synthetic and biotechnology processes as well as in food industry, and for medicinal treatments is added. Data sheets are arranged in their EC-Number sequence. The new edition reflects considerable progress in enzymology: the total material has more than doubled, and the complete 2nd edition consists of 39 volumes plus Synonym Index. Starting in 2009, all newly classified enzymes are treated in Supplement Volumes.
Many fundamental aspects of the methods used in mass spectrometry are presented here, with reference to recent developments. The principles and applications of electrospray, ion spray and MALDI ionization technique are included, together with optimised GC/MS interfacing systems and tools for quantitative analysis. There is also a comprehensive treatment of modern instrumentation for mass analysis and detection. The major part of the book deals with bioanalytical applications to peptides, proteins, oligonucleotides, polysaccharides, lipids and plant metabolites. Several contributions are devoted to the evaluation of adduct formation between DNA and carcinogens. Environmental applications are also included, with examples of some specific cases. Fundamentals and applications are treated with the same degree of depth, and the first two parts of the book therefore provide a basis for the understanding of the biomolecular-applications section. The book is intended for advanced graduate students of chemistry who have learned some basic mass spectrometry, and is also suitable for PhD students in chemistry, biology and medicine, as well as researchers in academic and industrial laboratories.
Tian Lu's dissertation describes major advances in ultrathin-layer chromatography (UTLC), liquid chromatography and surface-assisted laser desorption ionization (SALDI), and matrix-enhanced SALDI (ME-SALDI) mass spectrometry. Lu describes the fabrication of electrospun polyvinyl alcohol (PVA) UTLC plates using an in-situ crosslinking electrospinning technique. The author improved the efficiency of PVA plates greatly compared to the efficiency of silica HPTLC plates. Also highlighted in this thesis is an edge-plane based ordered-carbon surface that provides unique selectivity in liquid chromatography. Further developments include polar analytes, such as amino acids, nucleotides and nucleosides which can be well-retained and separated in the edge-plane ordered-carbon stationary phase. Also, the author studied and detected mass spectra of organic polymers as high as 900,000 Da, the highest molecular weight that has been studied by SALDI to date using the carbon nanofibrous substrate. This thesis has led to a number of publications in high-impact journals.
Topological insulators are insulating in the bulk, but process
metallic states present around its boundary owing to the
topological origin of the band structure. The metallic edge or
surface states are immune to weak disorder or impurities, and
robust against the deformation of the system geometry. This book,
the first of its kind on topological insulators, presents a unified
description of topological insulators from one to three dimensions
based on the modified Dirac equation. A series of solutions of the
bound states near the boundary are derived, and the existing
conditions of these solutions are described. Topological invariants
and their applications to a variety of systems from one-dimensional
polyacetalene, to two-dimensional quantum spin Hall effect and
p-wave superconductors, and three-dimensional topological
insulators and superconductors or superfluids are introduced,
helping readers to better understand this fascinating new
field.
This book compares and offers a comprehensive overview of nine analytical techniques important in material science and many other branches of science. All these methods are already well adapted to applications in diverse fields such as medical, environmental studies, archaeology, and materials science. This clearly presented reference describes and compares the principles of the methods and the various source and detector types.
This book is the first comprehensive work to be published on far-ultraviolet (FUV) and deep-ultraviolet (DUV) spectroscopy, subjects of keen interest because new areas of spectroscopy have been born in the FUV and DUV regions. For example, FUV spectroscopy in condensed matter has become possible due to the development of attenuated total reflection/FUV spectroscopy. As other examples, DUV surface-enhanced Raman scattering and DUV tip-enhanced Raman scattering have received great attention. Imaging by DUV spectroscopy has also become an area of interest. More recently, FUV and DUV spectroscopy have shown potential for applications in several fields including industry. All these topics are described in this book. Doctoral students and researchers in universities and national research institutes as well as researchers in various industries will find this volume highly useful.
This thesis provides the first successful study of jump diffusion processes in glasses on the atomic scale, utilizing a novel coherent technique. This new method, called atomic-scale X-ray Photon Correlation Spectroscopy or aXPCS, has only recently been proven to be able to capture diffusion processes with atomic resolution in crystal systems. With this new toolkit for studying atomic diffusion in amorphous systems, new insight into basic processes in a wide range of technically relevant materials, like fast ionic conductors, can be obtained.
Simulation of materials at the atomistic level is an important tool in studying microscopic structures and processes. The atomic interactions necessary for the simulations are correctly described by Quantum Mechanics, but the size of systems and the length of processes that can be modelled are still limited. The framework of Gaussian Approximation Potentials that is developed in this thesis allows us to generate interatomic potentials automatically, based on quantum mechanical data. The resulting potentials offer several orders of magnitude faster computations, while maintaining quantum mechanical accuracy. The method has already been successfully applied for semiconductors and metals.
The behavior of nanoscale materials can change rapidly with time either because the environment changes rapidly or because the influence of the environment propagates quickly across the intrinsically small dimensions of nanoscale materials. Extremely fast time resolution studies using X-rays, electrons and neutrons are of very high interest to many researchers and is a fast-evolving and interesting field for the study of dynamic processes. Therefore, in situ structural characterization and measurements of structure-property relationships covering several decades of length and time scales (from atoms to millimeters and femtoseconds to hours) with high spatial and temporal resolutions are crucially important to understand the synthesis and behavior of multidimensional materials. The techniques described in this book will permit access to the real-time dynamics of materials, surface processes and chemical and biological reactions at various time scales. This book provides an interdisciplinary reference for research using in situ techniques to capture the real-time structural and property responses of materials to surrounding fields using electron, optical and x-ray microscopies (e.g. scanning, transmission and low-energy electron microscopy and scanning probe microscopy) or in the scattering realm with x-ray, neutron and electron diffraction.
Scientists from many disciplines require making observations which are dependent upon the behavior of compounds in solution. This ranges from areas in geography, such as oceanography, to areas in chemistry, such as chromatography, to areas in biology, such as pharmacology. Historically, information would be obtained by observing a response for a given set of conditions and then the conditions would be changed and a new response obtained. In this approach there would be little effort made to actually understand how a compound was behaving in solution but rather just the response was noted. Understanding the behavior of compounds in solution is critical to understanding their behavior in biological systems. This has become increasingly important during the last twenty years as an understanding of the biochemistry related to human illness has become better understood. The development of the pharmaceutical industry and the need to rapidly screen large numbers of compounds has made scientists in the area of drug development aware that the pharmacological activity of compounds can be predicted by knowing their solution physical chemical properties. This is not to say that a specific drug-active site interaction can be predicted but rather a prediction can be made whether or not a compound will be absorbed, transported, or distributed within a physiological system in such a way that an interaction can occur.
This thesis addresses the development of a new force spectroscopy tool, correlation force spectroscopy (CFS) for the measurement of the properties of very small volumes of material (molecular to m3) at kHz-MHz frequency range. CFS measures the simultaneous thermal fluctuations of two closely-spaced atomic force microscopy (AFM) cantilevers. CFS then calculates the cross-correlation in the thermal fluctuations that gives the mechanical properties of the matter that spans the gap of the two cantilevers. The book also discusses development of CFS, its advantages over AFM, and its application in single molecule force spectroscopy and micro-rheology.
This book disseminates information on paper-based diagnostics devices and describes novel paper materials, fabrication techniques, and Basic Paper-based microfluidics/electronics theory. The section on sample preparation, paper-based electronics/sensors for developing paper-based point-of-care (POC) systems also contains detailed descriptions. In the application sections this book covers sensing technique for DNA/RNA, bacteria/virus and integration of lateral flow assay. The book provides deep understanding and knowledge of paper-based diagnostic device development in terms of concept, materials, fabrication and applications.
The directory Who's Who in Analytical Chemistry - Europe comprises information on more than 700 European analytical scientists including complete addresses, telephone and fax numbers, fields of expertise, research topics as well as consulting activities. Private, governmental and official laboratories are also included. Exhaustive indexes allow easy access to all entries. The increasing demand for internationally approved professionals in all fields of analytical chemistry makes this volume an invaluable source of information for the analytical industry, R + D institutions, consultants, private laboratories and university departments seeking for cooperation and service partners or consultancy.
This book is a manual of measurement of colloids and interfaces designed especially for new researchers who have just begun research on these topics. The book is written by active researchers in the field of colloids and interfacial chemistry, based on the practical experience of the authors. In each chapter, the key points of measurement, how to analyze data correctly, points to be careful about, and merits of a particular method are concisely explained from the point of view of the readers. Not only in industries such as cosmetics and pharmaceuticals but also in academic studies of nanotechnology, correct understanding of colloid and interface phenomena is vital because the properties of these items, however small, are affected by the nature of interfaces. This book will be particularly useful for researchers who are not yet fully confident of the measurement techniques that are clearly explained here. |
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