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Absolute Rate Constants For Hydrocarbon Autoxidation
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Book Synopsis Absolute Rate Constants for Hydrocarbon Autoxidation. Vii. Reactivities of Peroxy Radicals Toward Hydrocarbons and Hydroperoxides by : J. A. Howard
Download or read book Absolute Rate Constants for Hydrocarbon Autoxidation. Vii. Reactivities of Peroxy Radicals Toward Hydrocarbons and Hydroperoxides written by J. A. Howard and published by . This book was released on 1967 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The four propagation and three termination rate constants for the co-oxidation of cumene and Tetralin were determined at 30C and 56C. The secondary tetralylperoxy radical is about four times as reactive in hydrogen atom abstraction as the tertiary cumylperoxy radical. The rate constant for termination by reaction of a tetralylperoxy and a cumylperoxy radical has about one quarter of the value for termination by two tetralylperoxy radicals. Rate constants for the transfer of hydroperoxidic hydrogen to peroxy radicals were measured. This reaction exhibits an exceptionally large deuterium isotope effect. A possible explanation for the high value is suggested. The absolute rate constants at 30C. for hydrogen atom abstraction from toluene, ethylbenzene, cumene, and Tetralin by cumylperoxy, tetralylperoxy, and 9,10-dihydroanthracyl-9-peroxy radicals were measured. (Author).
Book Synopsis Absolute Rate Constants for Hydrocarbon Autoxidation by : J. A. Howard
Download or read book Absolute Rate Constants for Hydrocarbon Autoxidation written by J. A. Howard and published by . This book was released on 1965 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Absolute Rate Constants for Hydrocarbon Autoxidation. Xviii. Oxidation of Some Acyclic Ethers by : J. A. Howard
Download or read book Absolute Rate Constants for Hydrocarbon Autoxidation. Xviii. Oxidation of Some Acyclic Ethers written by J. A. Howard and published by . This book was released on 1969 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation and termination rate constants have been measured for autoxidation of benzyl phenyl ether, benzyl t-butyl ether, isopropyl ether, and benzyl ether. In the case of isopropyl ether and benzyl ether, estimates have been made of inter- and intramolecular propagation rate constants. Reactivities of acyclic ethers towards the t-butylperoxy radical have been determined. Rate constants for autoxidation of cyclic and acylic ethers have been summarized and compared. (Author).
Book Synopsis Absolute Rate Constants for Hydrocarbon Autoxidation. Xvi. Reactions of Peroxy Radicals at Low Temperatures by : K. Adamic
Download or read book Absolute Rate Constants for Hydrocarbon Autoxidation. Xvi. Reactions of Peroxy Radicals at Low Temperatures written by K. Adamic and published by . This book was released on 1969 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equilibrium constants for the formation of some t-alkyl tetroxides and the rate constants for irreversible decay of the tetroxides have been measured by electron spin resonance spectroscopy at low temperatures. The equilibrium constant appears to be virtually independent of the nature of the alkyl groups. It is concluded that differences in the rate of constants for chain termination by t-peroxy radicals at ambient temperatures are due chiefly to the differences in rate constants for irreversible tetroxide decomposition. The activation parameters for this reaction indicate that it occurs by one bond rather than two bond scission. (Author).
Book Synopsis ABSOLUTE RATE CONSTANTS FOR HYDROCARBON AUTOXIDATION. XV. THE INDUCED DECOMPOSITION OF SOME T-HYDROPEROXIDES. by : J. A. Howard
Download or read book ABSOLUTE RATE CONSTANTS FOR HYDROCARBON AUTOXIDATION. XV. THE INDUCED DECOMPOSITION OF SOME T-HYDROPEROXIDES. written by J. A. Howard and published by . This book was released on 1969 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The radical induced decomposition of several t-hydroperoxides at 30C has been studied. In the self reaction of t-alkylperoxy radicals the ratio of the rates of alkoxy radical diffusion from the cage to combination in the cage is essentially independent of the size of the t-alkyl group. The 1,1-diphenylethoxy radical undergoes a 1,2-phenyl shift to yield the 1-phenyl-1-phenoxyethyl radical more rapidly that it undergoes beta-scission. (Author).
Book Synopsis Handbook of Antioxidants by : Evgeny T. Denisov
Download or read book Handbook of Antioxidants written by Evgeny T. Denisov and published by CRC Press. This book was released on 1999-11-11 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for scientists and engineers involved in the chemistry and technology of antioxidants, the Second Edition of this popular handbook continues to provide comprehensive data on the thermodynamics and reactivity of antioxidants. Fully revised and updated, the Second Edition provides the latest data on antioxidants and polymer stabilizers, new data for biological antioxidants, a corrected list of bond dissociation energies, and a full bibliography. Additions and changes in the New Edition: The latest data on O-H bond dissociation energies of phenols and the new scale these values Thermodynamic functions of antioxidants and their intermediate presented in tables A table with current data on dissociation energies of C-H bonds of hydrocarbons and oxygen-containing compounds Rate constants and activation energies of reactions of antioxidants with ozone, nitrogen dioxide, and hydroperoxide Kinetic characteristics of benzoquinine reactions with antioxidants Rate constants of free radical generation through biomolecular reactions with ozone, nitrogen dioxide, and hydroperoxide All calculated data from the first edition has been recalculated in accordance with new data on dissociation energies and parameters of reactivity Data on thermodynamics of hydrogen bond formation of antioxidants All data on cyclic mechanisms of chain termination by antioxidants collected into a special chapter Special chapters on bioantioxidants and stabilization of polymers The Handbook of Antioxidants puts essential data at your fingertips. Its comprehensive nature and ease-of-use make it the resource for scientific researchers and engineers working in the field of physical chemistry of antioxidants.
Book Synopsis Handbook of Antioxidants by : Evguenii T. Denisov
Download or read book Handbook of Antioxidants written by Evguenii T. Denisov and published by CRC Press. This book was released on 2019-07-23 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for scientists and engineers involved in the physical chemistry of antioxidants, the Handbook of Antioxidants contains comprehensive data on the thermodynamics and reactivity of antioxidants. It includes: bond dissociation energies of antioxidants such as phenols (O-H bonds), aromatic amines (N-H bonds), hydroxyl amines (O-H bonds), thiophenols (S-H bonds) o activation energies and rate constants of reactions of peroxyl radicals with antioxidants o rate constants of reactions of phenoxyl, aminyl, and nitroxyl radicals with RH, ROOH, phenols, thiophenols, amines and hydroxyl amines and rate constants of reactions of antioxidants with hydroperoxides and oxygen.
Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Autoxidation in Food and Biological Systems by : M.G. Simic
Download or read book Autoxidation in Food and Biological Systems written by M.G. Simic and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: The material presented in this book deals with basic mechanisms of free radical reactions in autoxidation processes and anitoxidant suppression of autoxidation of foods, biochemical models and biologi cal systems. Autoxidation in foods and corresponding biological effects are usually approached separately although recent mechanistic developments in the biochemistry and free radical chemistry of per oxides and their precursors tend to bring these two fields closer. Apparent ability of antioxidants in diets to reduce the inci dence of cancer has resulted in scrutiny of autoxidized products and their precursors as possibly toxic, mutagenic and carcinogenic agents. Mechanisms of any of these effects have been barely ad dressed. Yet we know now that free radicals, as esoteric as they were only a few decades ago, are being discovered in foods, biochem ical and biological systems and do play a role in the above-mentioned causalities. The purpose of the Workshop and the resulting book was to give a unifying approach towards study of beneficial and deleterious effects of autoxidation, based on rigorous scientific considerations. It is our hope that the material presented in this book will not only provide a review of the "state of the art" of autoxidation and anti oxidants, but also reflect the interaction which occurred during the Workshop between workers using model sytems, and food and biological systems.
Download or read book Lipid Oxidation written by Amy S. Logan and published by Elsevier. This book was released on 2015-08-15 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lipid oxidation in food systems is one of the most important factors which affect food quality, nutrition, safety, color and consumers' acceptance. The control of lipid oxidation remains an ongoing challenge as most foods constitute very complex matrices. Lipids are mostly incorporated as emulsions, and chemical reactions occur at various interfaces throughout the food matrix. Recently, incorporation of healthy lipids into food systems to deliver the desired nutrients is becoming more popular in the food industry. Many food ingredients contain a vast array of components, many of them unknown or constituting diverse or undefined molecular structures making the need in the food industry to develop effective approaches to mitigate lipid oxidation in food systems. This book provides recent perspectives aimed at a better understanding of lipid oxidation mechanisms and strategies to improve the oxidative stability of food systems. - Five chapters on naturally-derived antioxidants that focus on applications within food systems - Contributors include an international group of leading researchers from academic, industrial, and governmental entities - Discusses the oxidative stability of enzymatically produced oils and fats - Provides overviews on the complexities of lipid oxidation mechanisms, and emulsion systems most suseptible to rapid lipid oxidation
Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1967-05 with total page 1470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pharmaceutical Stress Testing by : Steven W. Baertschi
Download or read book Pharmaceutical Stress Testing written by Steven W. Baertschi and published by CRC Press. This book was released on 2016-04-19 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Pharmaceutical Stress Testing: Predicting Drug Degradation provides a practical and scientific guide to designing, executing and interpreting stress testing studies for drug substance and drug product. This is the only guide available to tackle this subject in-depth. The Second Edition expands coverage from chemical stability
Book Synopsis Measurement of Antioxidant Activity and Capacity by : Resat Apak
Download or read book Measurement of Antioxidant Activity and Capacity written by Resat Apak and published by John Wiley & Sons. This book was released on 2018-02-20 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference for assessing the antioxidant potential of foods and essential techniques for developing healthy food products Measurement of Antioxidant Activity and Capacity offers a much-needed resource for assessing the antioxidant potential of food and includes proven approaches for creating healthy food products. With contributions from world-class experts in the field, the text presents the general mechanisms underlying the various assessments, the types of molecules detected, and the key advantages and disadvantages of each method. Both thermodynamic (i.e. efficiency of scavenging reactive species) and kinetic (i.e. rates of hydrogen atom or electron transfer reactions) aspects of available methods are discussed in detail. A thorough description of all available methods provides a basis and rationale for developing standardized antioxidant capacity/activity methods for food and nutraceutical sciences and industries. This text also contains data on new antioxidant measurement techniques including nanotechnological methods in spectroscopy and electrochemistry, as well as on innovative assays combining several principles. Therefore, the comparison of conventional methods versus novel approaches is made possible. This important resource: Offers suggestions for assessing the antioxidant potential of foods and their components Includes strategies for the development of healthy functional food products Contains information for identifying antioxidant activity in the body Presents the pros and cons of the available antioxidant determination methods, and helps in the selection of the most appropriate method Written for researchers and professionals in the nutraceutical and functional food industries,academia and government laboratories, this text includes the most current knowledge in order to form a common language between research groups and to contribute to the solution of critical problems existing for all researchers working in this field.
Book Synopsis Lipids and Edible Oils by : Charis M. Galanakis
Download or read book Lipids and Edible Oils written by Charis M. Galanakis and published by Academic Press. This book was released on 2019-10-05 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lipids and Edible Oils: Properties, Processing and Applications covers the most relevant topics of lipids and edible oils, especially their properties, processing and applications. Over the last years, researchers have investigated lipid bioavailability, authentication, stability and oxidation during processing and storage, hence the development of food and non-food applications of lipids and edible oils has attracted great interest. The book explores lipid oxidation in foods, the application of lipids as nano-carriers of food bioactive compounds, and their bioavailability, metabolism and nutritional genomics. Regarding edible oils, the book thoroughly explores their triacylglycerols content, biodiesel and energy production from vegetable oils, refining and lifecycle assessment. Written by a team of interdisciplinary experts that research lipids and edible oils, the book is intended for food scientists, technologists, engineers and chemists working in the whole food science field. - Thoroughly explores the technological properties of lipids and edible oils - Includes food processing by-products and microalgae as a source of lipids and edible oils - Reviews novelties in edible oil products and processing, including refining techniques, biorefinery and value creation processing waste
Download or read book Nitroxides written by Alexander Kokorin and published by BoD – Books on Demand. This book was released on 2012-09-12 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitroxide (aminoxyl) radicals became the start point for one of the most interesting and rapidly developing areas of modern chemical physics with valuable applications to biophysics, molecular biology, polymer sciences and medicine. This book, consisting of 15 chapters gathered in 3 sections, written by authors actively involved in the area of spin label/probe technique. The authors describe in detail some novel trends and analyze new approaches of practical applications of nitroxide radicals. The book, recommended by the Governing Council of N. Semenov International Center of Chemical Physics, Moscow, will be of help to many scientists: chemists, physical chemists, biophysicists, biologists, physicians and other experts in a variety of disciplines, in which spin labels and probes are used, as well as to students and PhD students. It may be also suitable for teaching, and may help to promote the progress in natural sciences.
Book Synopsis Comprehensive Nuclear Materials by :
Download or read book Comprehensive Nuclear Materials written by and published by Elsevier. This book was released on 2020-07-22 with total page 4871 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials in a nuclear environment are exposed to extreme conditions of radiation, temperature and/or corrosion, and in many cases the combination of these makes the material behavior very different from conventional materials. This is evident for the four major technological challenges the nuclear technology domain is facing currently: (i) long-term operation of existing Generation II nuclear power plants, (ii) the design of the next generation reactors (Generation IV), (iii) the construction of the ITER fusion reactor in Cadarache (France), (iv) and the intermediate and final disposal of nuclear waste. In order to address these challenges, engineers and designers need to know the properties of a wide variety of materials under these conditions and to understand the underlying processes affecting changes in their behavior, in order to assess their performance and to determine the limits of operation. Comprehensive Nuclear Materials, Second Edition, Seven Volume Set provides broad ranging, validated summaries of all the major topics in the field of nuclear material research for fission as well as fusion reactor systems. Attention is given to the fundamental scientific aspects of nuclear materials: fuel and structural materials for fission reactors, waste materials, and materials for fusion reactors. The articles are written at a level that allows undergraduate students to understand the material, while providing active researchers with a ready reference resource of information. Most of the chapters from the first Edition have been revised and updated and a significant number of new topics are covered in completely new material. During the ten years between the two editions, the challenge for applications of nuclear materials has been significantly impacted by world events, public awareness, and technological innovation. Materials play a key role as enablers of new technologies, and we trust that this new edition of Comprehensive Nuclear Materials has captured the key recent developments. Critically reviews the major classes and functions of materials, supporting the selection, assessment, validation and engineering of materials in extreme nuclear environments Comprehensive resource for up-to-date and authoritative information which is not always available elsewhere, even in journals Provides an in-depth treatment of materials modeling and simulation, with a specific focus on nuclear issues Serves as an excellent entry point for students and researchers new to the field
Book Synopsis Polyethylene-Based Blends, Composites and Nanocomposities by : Visakh P. M.
Download or read book Polyethylene-Based Blends, Composites and Nanocomposities written by Visakh P. M. and published by John Wiley & Sons. This book was released on 2015-07-06 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focusses on the recent technical research accomplishments in the area of polyethylene-based blends, composites and nanocomposites by looking at the various aspects of processing, morphology, properties and applications. In particular, the book details the important developments in areas such as the structure-properties relationship of polyethylene; modification of polyethylene with radiation and ion implantation processes; stabilization of irradiated polyethylene by the introduction of antioxidants; reinforcement of polyethylene through carbon-based materials as additives; characterization of carbon-based polyethylenes composites, polyethylene-based blends with thermoplastic and thermoset; characterization of polyethylene-based thermoplastic and thermoset blends; polyethylene-based blends with natural rubber and synthetic rubber; characterization of polyethylene-based natural rubber and synthetic rubber blends; characterization of polyethylene-based composites.
