Download or read book M thodes d ionisation dans un spectom tre de masse FTICR transportable written by Christophe Dehon and published by . This book was released on 2009 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les techniques de spectrométrie de masse en piège permettent de garder, sélectionner, faire réagir et détecter les particules chargées. Les spectromètres de masse FTICR transportables développés au laboratoire, basés sur des aimants permanents, offrent la possibilité d’utiliser diverses méthodes d’ionisation comme l’impact électronique, l’ionisation chimique ou des méthodes de photoionisation. Durant cette thèse, différentes réactions ion-molécule ont été étudiées dans le but de les appliquer à l’ionisation chimique des composés organiques volatils. Ces méthodes d'ionisation ont ensuite été testées en conditions d'analyse. Le transfert de proton par H3O+ est un moyen d’ionisation douce, c'est-à-dire en général sans fragmentation, et a été utilisé pour l’analyse de mélanges complexes et de composés à l’état de traces dans l’air. Des transferts de proton plus sélectifs ont également été étudiés. D’autres réactions ion-molécule comme l'abstraction d’hydrure par CF3+ la capture de proton en mode négatif par OH- ou encore des réactions de complexation utilisant l’ion cyclopentadienylcobalt ont été mises en oeuvre pour élargir les possibilités de la méthode à des analyses non réalisables avec H3O+. Le spectromètre FTICR transportable MICRA possédant une cellule permettant la focalisation d’un faisceau de photons en son centre, nous avons aussi utilisé MICRA en couplage avec des sources synchrotrons pour réaliser deux types d'expériences impliquant la photoionisation VUV : d'une part l’étude de la chimie atmosphérique de Titan, d'autre part la détermination du seuil photoionisation du monocation du xénon combinant deux méthodes d’ionisation (impact électronique et photoionisation).
Download or read book Proton Transfer Reaction Mass Spectrometry written by Andrew M. Ellis and published by John Wiley & Sons. This book was released on 2013-12-17 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton Transfer Reaction Mass Spectrometry (PTR-MS) is a rapidly growing analytical technique for detecting and identifying very small quantities of chemical compounds in air. It has seen widespread use in atmospheric monitoring and food science and shows increasing promise in applications such as industrial process monitoring, medical science and in crime and security scenarios. Written by leading researchers, this is the first book devoted to PTR-MS and it provides a comprehensive account of the basic principles, the experimental technique and various applications, thus making this book essential reading for researchers, technicians, postgraduate students and professionals in industry. The book contains nine chapters and is divided into two parts. The first part describes the underlying principles of the PTR-MS technique, including • the relevant ion-molecule chemistry • thermodynamics and reaction kinetics • a discussion of ion sources, drift tubes and mass spectrometers • practical aspects of PTR-MS, including calibration. The second part of the book turns its attention to some of the many applications of PTR-MS, demonstrating the scope and benefits, as well as the limitations, of the technique. The chapters that make up the second part of the book build upon the material presented in the first part and are essentially self-contained reviews focusing on the following topics: • environmental science • food science • medicine • homeland security, and • applications of PTR-MS in liquid analysis.
Download or read book Balances written by Erich Robens and published by Springer Science & Business Media. This book was released on 2013-10-01 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals mainly with direct mass determination by means of a conventional balances. It covers the history of the balance from the beginnings in Egypt earlier than 3000 BC to recent developments. All balance types are described with emphasis on scientific balances. Methods of indirect mass determination, which are applied to very light objects like molecules and the basic particles of matter and celestial bodies, are included. As additional guidance, today’s manufacturers are listed and the profile of important companies is reviewed. Several hundred photographs, reproductions and drawings show instruments and their uses. This book includes commercial weighing instruments for merchandise and raw materials in workshops as well as symbolic weighing in the ancient Egyptian’s ceremony of ‘Weighing of the Heart’, the Greek fate balance, the Roman Justitia, Juno Moneta and Middle Ages scenes of the Last Judgement with Jesus or St. Michael and of modern balances. The photographs are selected from the slide-archives of the late Richard Vieweg (1896-1972) (former President of the Physikalisch-Technische Bundesanstalt, Braunschweig, Germany), of the late Hans R. Jenemann (1920-1966) (former head of the Analytical Laboratory of Schott & Gen., Mainz, Germany) and of his wife Irene (1933-2008) and of Erich Robens.
Download or read book Comprehensive Foodomics written by and published by Elsevier. This book was released on 2020-11-12 with total page 2444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Foodomics, Three Volume Set offers a definitive collection of over 150 articles that provide researchers with innovative answers to crucial questions relating to food quality, safety and its vital and complex links to our health. Topics covered include transcriptomics, proteomics, metabolomics, genomics, green foodomics, epigenetics and noncoding RNA, food safety, food bioactivity and health, food quality and traceability, data treatment and systems biology. Logically structured into 10 focused sections, each article is authored by world leading scientists who cover the whole breadth of Omics and related technologies, including the latest advances and applications. By bringing all this information together in an easily navigable reference, food scientists and nutritionists in both academia and industry will find it the perfect, modern day compendium for frequent reference. List of sections and Section Editors: Genomics - Olivia McAuliffe, Dept of Food Biosciences, Moorepark, Fermoy, Co. Cork, Ireland Epigenetics & Noncoding RNA - Juan Cui, Department of Computer Science & Engineering, University of Nebraska-Lincoln, Lincoln, NE Transcriptomics - Robert Henry, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, Australia Proteomics - Jens Brockmeyer, Institute of Biochemistry and Technical Biochemistry, University Stuttgart, Germany Metabolomics - Philippe Schmitt-Kopplin, Research Unit Analytical BioGeoChemistry, Neuherberg, Germany Omics data treatment, System Biology and Foodomics - Carlos Leon Canseco, Visiting Professor, Biomedical Engineering, Universidad Carlos III de Madrid Green Foodomics - Elena Ibanez, Foodomics Lab, CIAL, CSIC, Madrid, Spain Food safety and Foodomics - Djuro Josic, Professor Medicine (Research) Warren Alpert Medical School, Brown University, Providence, RI, USA & Sandra Kraljevic Pavelic, University of Rijeka, Department of Biotechnology, Rijeka, Croatia Food Quality, Traceability and Foodomics - Daniel Cozzolino, Centre for Nutrition and Food Sciences, The University of Queensland, Queensland, Australia Food Bioactivity, Health and Foodomics - Miguel Herrero, Department of Bioactivity and Food Analysis, Foodomics Lab, CIAL, CSIC, Madrid, Spain Brings all relevant foodomics information together in one place, offering readers a ‘one-stop,’ comprehensive resource for access to a wealth of information Includes articles written by academics and practitioners from various fields and regions Provides an ideal resource for students, researchers and professionals who need to find relevant information quickly and easily Includes content from high quality authors from across the globe
Download or read book Introduction to GC MS Coupling written by Stphane Bouchonnet and published by CRC Press. This book was released on 2013-02-20 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although GC-MS (gas chromatography-mass spectrometry) finds applications in fields as diverse as the food processing industry, medicine, pharmacology, and environmental analysis, the few works that are dedicated to this use of mass spectrometry are generally highly complex and theoretical. Emphasizing the practical aspects of GC-MS, without neglect
Download or read book Mass Spectrometry for Biotechnology written by Gary Siuzdak and published by Elsevier. This book was released on 1996-02-12 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you investigate biological systems and might use mass spectrometry in your research but need to know more about it, this book is for you. It introduces the fundamental concepts of mass spectrometry and how mass spectrometers work. It also presents recent advancements particularly interesting to bio-researchers in an easy-to-understand manner that does not require extensive background in chemistry, math, or physics. - Glossary of basic terms - Abundant illustrations - Examples of applications - Practical tips on using mass spectrometric techniques - Useful for peptide, protein, oligonucleotide, and carbohydrate analysis - Simplified description of mass spectrometry including: - Matrix-Assisted Laser Desorption/Ionization (MALDI) - Electrospray Ionization (ESI) - Fast Atom/Ion Bombardment (FAB)
Download or read book Organic Chemistry of Museum Objects written by John Mills and published by Routledge. This book was released on 2012-09-10 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The Organic Chemistry of Museum Objects' makes available in a single volume, a survey of the chemical composition, properties and analysis of the whole range of organic materials incorporated into objects and artworks found in museum collections. The authors cover the fundamental chemistry of the bulk materials such as wood, paper, natural fibres and skin products, as well as that of the relatively minor components incorporated as paint, media, varnishes, adhesives and dyes. This expanded second edition, now in paperback, follows the structure of the first, though it has been extensively updated. In addition to chapters on basic organic chemistry, analytical methods, analytical findings and fundamental aspects of deterioration, the subject matter is grouped as far as possible by broad chemical class - oils and fats, waxes, bitumens, carbohydrates, proteins, natural resins, dyestuffs and synthetic polymers. This is an essential purchase for all practising and student conservators, restorers, museum scientists, curators and organic chemists.
Download or read book Interpr tation des spectres de masse en couplage GC MS cours et exerices corrig s written by BOUCHONNET Stéphane and published by Lavoisier. This book was released on 2012-09-04 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: C’est avec une réelle volonté didactique que cet ouvrage aborde l’interprétation des spectres de masse pour confirmer ou élucider des structures chimiques. Les publications scientifiques dédiées à la spectrométrie de masse sont souvent complexes et présentent une approche très théorique, souvent difficile à comprendre et à mettre en pratique. Ce livre se fait fort, grâce à sa simplicité et à sa démarche ancrée dans la pratique, d’offrir aux débutants comme aux spécialistes du domaine, les clés de cette technique. Un premier chapitre présente des rappels de chimie organique nécessaires à une bonne compréhension des réactions impliquées. Dans un deuxième chapitre, les mécanismes de formation et de dissociation des ions sont détaillés : ruptures simples et réarrangements, fragmentations secondaires, etc. Ces mécanismes sont illustrés de nombreux exemples concrets. La seconde partie de cet ouvrage propose une cinquantaine d'exercices corrigés permettant d'acquérir maîtrise et autonomie. À la fois manuel universitaire et guide pratique quotidien, L’interprétation des spectres de masse en couplage GC-MS constitue une référence pour tous les utilisateurs de couplage GC-MS tels que les ingénieurs, techniciens, chercheurs, étudiants, etc., débutants ou confirmés, désireux d'interpréter judicieusement leurs spectres de masse. Outre l'élucidation structurale, la compréhension des mécanismes qui régissent l'interprétation des spectres permet l'amélioration des méthodes analytiques et la fiabilisation des résultats.
Download or read book Gamow Shell Model written by Nicolas Michel and published by Springer Nature. This book was released on 2021-04-24 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the first graduate-level, self-contained introduction to recent developments that lead to the formulation of the configuration-interaction approach for open quantum systems, the Gamow shell model, which provides a unitary description of quantum many-body system in different regimes of binding, and enables the unification in the description of nuclear structure and reactions. The Gamow shell model extends and generalizes the phenomenologically successful nuclear shell model to the domain of weakly-bound near-threshold states and resonances, offering a systematic tool to understand and categorize data on nuclear spectra, moments, collective excitations, particle and electromagnetic decays, clustering, elastic and inelastic scattering cross sections, and radiative capture cross sections of interest to astrophysics. The approach is of interest beyond nuclear physics and based on general properties of quasi-stationary solutions of the Schrödinger equation – so-called Gamow states. For the benefit of graduate students and newcomers to the field, the quantum-mechanical fundamentals are introduced in some detail. The text also provides a historical overview of how the field has evolved from the early days of the nuclear shell model to recent experimental developments, in both nuclear physics and related fields, supporting the unified description. The text contains many worked examples and several numerical codes are introduced to allow the reader to test different aspects of the continuum shell model discussed in the book.
Download or read book Automatic Segmentation and Clustering of Spectral Terahertz Data written by Henrike Stephani and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2012 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this thesis is to find ways to improve the analysis of hyperspectral Terahertz (THz) images. Although it would be desirable to have methods that can be applied on all spectral areas, this is impossible. Depending on the spectroscopic technique, the way the data is acquired differs as well as the characteristics that are to be detected. For these reasons, methods have to be developed or adapted to be especially suitable for the THz range and its applications. This work particularly aims at segmenting or clustering THz data. To achieve this, we propose a course of action that makes the methods adaptable to different kinds of measurements and applications, among those are the security sector and the pharmaceutical industry. State of the art methods will be analyzed and supplemented where necessary, improvements and new methods will be proposed. The course of action includes preprocessing methods to make the data comparable. Furthermore, feature reduction that represents chemical content in about $20$ channels instead of the initial hundreds will be presented. Finally the data will be segmented by efficient hierarchical clustering schemes. Various applications are shown
Download or read book Hydrothermal Experimental Techniques written by Gene Carleton Ulmer and published by Wiley-Interscience. This book was released on 1987-08-14 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very Good,No Highlights or Markup,all pages are intact.
Download or read book Highly Siderophile and Strongly Chalcophile Elements in High Temperature Geochemistry and Cosmochemistry written by Jason Harvey and published by Walter de Gruyter GmbH & Co KG. This book was released on 2016-03-07 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly Siderophile and Strongly Chalcophile Elements in High Temperature Geochemistry and Cosmochemistry, Volume 81 This RiMG (Reviews in Mineralogy & Geochemistry) volume investigates the application of highly siderophile (HSE) and strongly chalcophile elements. This volume has its origin in a short course sponsored by the Mineralogical Society of America and the Geochemical Society held in San Diego, California on the 11th and 12th December 2015, ahead of the American Geophysical Union’s Fall Meeting, which featured a session with the same title. Topics in this volume include: analytical methods and data quality experimental constraints applied to understanding HSE partitioning nucleosynthetic variations of siderophile and chalcophile elements HSE in the Earth, Moon, Mars and asteroidal bodies HSE and chalcophile elements in both cratonic and non-cratonic mantle, encompassing both sub-continental and sub-oceanic lithosphere the importance of the HSE for studying volcanic and magmatic processes, and an appraisal of the importance of magmatic HSE ore formation in Earth’s crust. Highly siderophile and strongly chalcophile elements comprise Re, Os, Ir, Ru, Pt, Rh, Pd, Au, Te, Se and S and are defined by their strong partitioning into the metallic phase, but will also strongly partition into sulfide phases, in the absence of metal. The chemical properties of the HSE mean that they are excellent tracers of key processes in high temperature geochemistry and cosmochemistry, having applications in virtually all areas of earth science. A key aspect of the HSE is that three long-lived, geologically useful decay systems exist with the HSE as parent (107Pd-107Ag), or parent-daughter isotopes (187Re-187Os and 190Pt-186Os). The material in this book is accessible for graduate students, researchers, and professionals with interests in the geochemistry and cosmochemistry of these elements, geochronology, magmatic ore bodies and the petrogenesis of platinum-group minerals.
Download or read book Ultra Performance Liquid Chromatography Mass Spectrometry written by Mu Naushad and published by CRC Press. This book was released on 2014-03-18 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unique collection of up-to-date UPLC-MS/MS (ultra performance liquid chromatography-tandem mass spectrometric) methods for the separation and quantitative determination of pesticides, capsaicinoids, heterocyclic amines, aflatoxin, perfluorochemicals, acrylamide, procyanidins and alkaloids, lactose content, phenolic compounds, vitamins, and aroma and flavor compounds in a wide variety of foods and food products. With contributions by experts in interdisciplinary fields, this reference offers practical information for readers in research and development, production, and routing analysis of foods and food products.
Download or read book Lasers in the Conservation of Artworks written by Johann Nimmrichter and published by Springer Science & Business Media. This book was released on 2009-08-09 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of "Lasers in the Conservation of Artworks" is gaining importance and restorers and laser scientists now work together to develop new applications. This book presents a fascinating and valuable application of laser technology. The proceedings of the 2005 congress addresses scientists, conservator-restorers, companies, architects, decision-makers and other experts involved in conservation projects or in the research of new laser equipment.
