Download or read book Contaminated Water Supplies at Camp Lejeune written by National Research Council and published by National Academies Press. This book was released on 2009-09-06 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the early 1980s, two water-supply systems on the Marine Corps Base Camp Lejeune in North Carolina were found to be contaminated with the industrial solvents trichloroethylene (TCE) and perchloroethylene (PCE). The water systems were supplied by the Tarawa Terrace and Hadnot Point watertreatment plants, which served enlisted-family housing, barracks for unmarried service personnel, base administrative offices, schools, and recreational areas. The Hadnot Point water system also served the base hospital and an industrial area and supplied water to housing on the Holcomb Boulevard water system (full-time until 1972 and periodically thereafter). This book examines what is known about the contamination of the water supplies at Camp Lejeune and whether the contamination can be linked to any adverse health outcomes in former residents and workers at the base.
Download or read book Soil Sampling and Analysis for Volatile Organic Compounds written by and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Mobility Spectrometry Third Edition written by G.A. Eiceman and published by CRC Press. This book was released on 2013-12-10 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the turn of the twenty-first century, applications of ion mobility spectrometry (IMS) have diversified, expanding their utility in the military and security spheres and entering the realms of clinical practice and pharmaceutical exploration. Updated and expanded, the third edition of Ion Mobility Spectrometry begins with a comprehensive discussion of the fundamental theory and practice of IMS. Divided into four sections—Overview, Technology, Fundamentals, and Applications—the authors treat innovations and advances in all aspects of IMS in a fresh, thorough, and revised format. Features: Introduces the definitions, theory, and practice of IMS and summarizes its history from the beginnings of the study of ions to present commercial and scholarly activities Presents the technology of IMS from a measurement perspective—covering inlet through ion formation, ion injection, electric fields, drift tube structures, and detectors Covers the end results of measurement, the mobility spectrum, and the transformative trend of ion mobility: mass spectrometry Discusses the influence on the experimental parameters on the mobility of ions Mobility-based methods are no longer restricted to volatile substances and indeed the many benefits of this technology—simplicity, convenience, and the low cost of technology—have become recognized as meritorious in a wide range of uses. This is also true for the advantages of measurements—high speed, distinctive spectral features, and operation in ambient pressure with thermalized ions. Ion Mobility Spectrometry, Third Edition serves specialists in the field of IMS who are interested in the potential of recent developments and researchers, engineers, and students who want a comprehensive overview of this technology.
Download or read book Progress in Volatile Organic Compounds Research written by Igor Jerković and published by MDPI. This book was released on 2020-12-29 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volatile organic compounds (VOCs) have been intensively investigated in the last few decades. Their origins differ: plant secondary metabolites, food/beverages aromas, fungal/bacterial volatiles, and others. VOCs typically occur as complex mixtures of compounds (e.g., monoterpenes, sesquiterpenes, norisoprenoids, aliphatic/aromatic compounds, sulfur containing compounds, and others). They form through different biochemical pathways and can be modified or created during drying or maturation, thermal treatment, and others. Different conventional or modern methods of VOCs isolation, followed by the analysis with chromatographic and spectroscopic techniques, usually provide different chemical profiles and have been under constant modification and upgrading. The ecological interactions are mediated by VOCs (inter- and intra-organismic communication) and they can act as pheromones, attractants, or alleochemicals. Among them, chemical biomarkers of botanical origin or chemotaxonomic markers may be found. Many VOCs possess different biological activities, such as antioxidant, antimicrobial, antiviral, anticancer, and other activities. VOCs research from different sources is required to report their distribution and chemical profiles, and to discover new compounds. This Special Issue aims to attract up-to-date contributions on all aspects of VOCs chemistry, from challenges in their isolation to analysis, and on unlocking their biological activities or other useful properties
Download or read book Handbook of Food Analysis Methods and instruments in applied food analysis written by Leo M. L. Nollet and published by CRC Press. This book was released on 2004 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents contemporary methods of measuring optical properties, moisture, ash content, and other physical characteristics of food and evaluates techniques used to trace nutrient analytes ranging from peptides, proteins, and enzymes to aroma compounds to carbohydrates and starch.
Download or read book Exhaled Biomarkers written by I. Horvath and published by European Respiratory Society. This book was released on 2010-09-01 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exhaled air contains numerous substances, often in extremely low concentrations. The development of sensitive detection techniques has made it possible to examine the composition of exhaled air in relation to a variety of airway diseases and other disorders. In this book, an overview of current cutting-edge breath analysis techniques and their clinical applications is provided for the clinician. The various contributions give a fascinating perspective of a future where new, highly sensitive methodologies will enable clinicians to diagnose and monitor a wide variety of diseases merely by taking.
Download or read book Metabolism of Fruit Volatile Organic Compounds written by Jinhe Bai and published by Frontiers Media SA. This book was released on 2022-06-29 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volatile Organic Compounds in the Atmosphere written by Ralf Koppmann and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day, large quantities of volatile organic compounds (VOCs) are emitted into the atmosphere from both anthropogenic and natural sources. The formation of gaseous and particulate secondary products caused by oxidation of VOCs is one of the largest unknowns in the quantitative prediction of the earth’s climate on a regional and global scale, and on the understanding of local air quality. To be able to model and control their impact, it is essential to understand the sources of VOCs, their distribution in the atmosphere and the chemical transformations which remove these compounds from the atmosphere. In recent years techniques for the analysis of organic compounds in the atmosphere have been developed to increase the spectrum of detectable compounds and their detection limits. New methods have been introduced to increase the time resolution of those measurements and to resolve more complex mixtures of organic compounds. Volatile Organic Compounds in the Atmosphere describes the current state of knowledge of the chemistry of VOCs as well as the methods and techniques to analyse gaseous and particulate organic compounds in the atmosphere. The aim is to provide an authoritative review to address the needs of both graduate students and active researchers in the field of atmospheric chemistry research.
Download or read book Olfaction and Electronic Nose Fifth International Symposium Proceedings written by W. Jeffry Hurst and published by CRC Press. This book was released on 1999-07-23 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Olfaction and Taste V is a collection of the proceedings of the fifth international symposium held at the Howard Florey Institute of Experimental Physiology & Medicine, University of Melbourne, Australia, October 1974. Contributors discuss the knowledge about olfaction and taste, including the anatomy of receptors and their ultrastructure, innervation of receptor fields, and the processes of receptor turnover. Themes ranging from taste modifiers and receptor proteins to afferent coding; how the sensory code for taste and olfaction are processed and sharpened
Download or read book Static Headspace Gas Chromatography written by Bruno Kolb and published by John Wiley & Sons. This book was released on 2006-04-20 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: STATIC HEADSPACE-GAS CHROMATOGRAPHY THE ONLY REFERENCE TO PROVIDE BOTH CURRENT AND THOROUGH COVERAGE OF THIS IMPORTANT ANALYTICAL TECHNIQUE Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC. Static Headspace-Gas Chromatography: Theory and Practice has long been the only reference to provide in-depth coverage of this method of analysis. The Second Edition has been thoroughly updated to reflect the most recent developments and practices, and also includes coverage of solid-phase microextraction (SPME) and the purge-and-trap technique. Chapters cover: Principles of static and dynamic headspace analysis, including the evolution of HS-GC methods and regulatory methods using static HS-GC Basic theory of headspace analysis—physicochemical relationships, sensitivity, and the principles of multiple headspace extraction HS-GC techniques—vials, cleaning, caps, sample volume, enrichment, and cryogenic techniques Sample handling Cryogenic HS-GC Method development in HS-GC Nonequilibrium static headspace analysis Determination of physicochemical functions such as vapor pressures, activity coefficients, and more Comprehensive and focused, Static Headspace-Gas Chromatography, Second Edition provides an excellent resource to help the reader achieve optimal chromatographic results. Practical examples with original data help readers to master determinations in a wide variety of areas, such as forensic, environmental, pharmaceutical, and industrial applications.
Download or read book Environmental Technology Verification Report Field Portable Gas Chromatograph Sentex Systems Inc Scentograph Plus II written by and published by DIANE Publishing. This book was released on with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Machine Olfaction Devices written by Najib Altawell and published by Elsevier. This book was released on 2021-10-14 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Machine Olfaction Devices discusses the various aspects of a MOD device, from historical approaches to state-of-the-art technologies. This book also covers the mechanism in dealing and detecting gases, odor, and aroma. Problems and solutions relevant to present day design have been outlined as well as a step-by-step guide to Machine Olfaction Device (MOD) design. Sensors and gas systems, along with polymers and certain manufacturing processes, have been discussed, together with other relevant materials for the MOD process and functions including comparison and validations, data processing, data analysis, MOD new design, micro systems, and monitoring systems. Aimed at developing a novel and improved MOD with more efficient on-board data processing capability for monitoring applications, this book will help you to design an MOD with - a faster stabilizing base line; - a quicker sample result display; - an ability to use ambient air; - a low power consumption; and - the ability to deal with different varieties of organic/inorganic samples. With a focus on the most important and relevant aspects of designing MODs which currently require a solution, topics covered include MOD and market issues, cost, technical issues, and MOD applications. With a huge range of potential applications, this book will be of special interest to those working (or studying) in this field at every level, from Biomedical, Energy, or Electrical Engineers, to Computer or Food Scientists. Introduction to Machine Olfaction Devices discusses the various aspects of a MOD device, from historical approaches to state-of-the-art technologies. This book also covers the mechanism in dealing and detecting gases, odor, and aroma. Problems and solutions relevant to present day design have been outlined as well as a step-by-step guide to Machine Olfaction Device (MOD) design. Sensors and gas systems, along with polymers and certain manufacturing processes, have been discussed, together with other relevant materials for the MOD process and functions including comparison and validations, data processing, data analysis, MOD new design, micro systems, and monitoring systems. Aimed at developing a novel and improved MOD with more efficient on-board data processing capability for monitoring applications, this book will help you to design an MOD with - a faster stabilizing base line; - a quicker sample result display; - an ability to use ambient air; - a low power consumption; and - the ability to deal with different varieties of organic/inorganic samples. With a focus on the most important and relevant aspects of designing MODs which currently require a solution, topics covered include MOD and market issues, cost, technical issues, and MOD applications. With a huge range of potential applications, this book will be of special interest to those working (or studying) in this field at every level, from Biomedical, Energy, or Electrical Engineers, to Computer or Food Scientists. - Focuses on the most important and relevant aspects of designing machine olfaction devices (MOD) which currently require a solution - Topics covered include: MOD and market issues; MOD and cost; MOD and technical issues; MOD applications
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 Comprehensive Sampling and Sample Preparation written by Josep M. Bayona and published by Academic Press. This book was released on 2012-12-31 with total page 2998 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Sampling and Sample Preparation is a complete treatment of the theory and methodology of sampling in all physical phases and the theory of sample preparation for all major extraction techniques. It is the perfect starting point for researchers and students to design and implement their experiments and support those experiments with quality-reviewed background information. In its four volumes, fundamentals of sampling and sample preparation are reinforced through broad and detailed sections dealing with Biological and Medical, Environmental and Forensic, and Food and Beverage applications. The contributions are organized to reflect the way in which analytical chemists approach a problem. It is intended for a broad audience of analytical chemists, both educators and practitioners of the art and can assist in the preparation of courses as well in the selection of sampling and sample preparation techniques to address the challenges at hand. Above all, it is designed to be helpful in learning more about these topics, as well as to encourage an interest in sampling and sample preparation by outlining the present practice of the technology and by indicating research opportunities. Sampling and Sample preparation is a large and well-defined field in Analytical Chemistry, relevant for many application areas such as medicine, environmental science, biochemistry, pharmacology, geology, and food science. This work covers all these aspects and will be extremely useful to researchers and students, who can use it as a starting point to design and implement their experiments and for quality-reviewed background information There are limited resources that Educators can use to effectively teach the fundamental aspects of modern sample preparation technology. Comprehensive Sampling and Sample Preparation addresses this need, but focuses on the common principles of new developments in extraction technologies rather than the differences between techniques thus facilitating a more thorough understanding Provides a complete overview of the field. Not only will help to save time, it will also help to make correct assessments and avoid costly mistakes in sampling in the process Sample and sample preparation are integral parts of the analytical process but are often less considered and sometimes even completely disregarded in the available literature. To fill this gap, leading scientists have contributed 130 chapters, organized in 4 volumes, covering all modern aspects of sampling and liquid, solid phase and membrane extractions, as well as the challenges associated with different types of matrices in relevant application areas
Download or read book Organic Compounds in Natural Waters written by T Roy Crompton and published by CRC Press. This book was released on 2013-09-23 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential health hazards that might arise from the presence of organic substances in water are a matter of increasing concern to the water industry, environmentalists and the general public alike. This comprehensive reference draws together and systematises the vast body of information available on the occurrence and determination of organic substances in natural waters. Organic Compounds in Natural Waters provides a comprehensive description of organic substances in waters. Methods are provided in broad outline, with guidance on their applicability, their comparative advantages and disadvantages, possible interferences, sensitivity and detection levels. The book is an essential reference for analytical chemists working in industry, water utilities, government, non government organisations and regulatory agencies and environmental/analytical consultants.
Download or read book ORD Publications Announcement written by Center for Environmental Research Information (U.S.) and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Volatile Analysis written by Hans F. Linskens and published by Springer Science & Business Media. This book was released on 1997-04-16 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers a vast array of methods for the analysis of volatile compounds exuded by plants. Some of these volatiles are of great commercial importance, including the aromas of wines and teas, and volatiles in fruits. Other volatiles such as essential oils can be useful for chemotaxonomic purposes, and a chapter on an emerging method, that of chemometric analysis of such data, is included. Isoprene and ammonia rarely find a place in analytical methods presented for plant materials, but methods for these volatiles are described in this book. The volatiles given off by flowers are also included, and in situ headspace analysis of these volatiles is described, a method of potential use for the study of insect-plant interactions.
