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Elsevier

Libros en Ingeniería Química

  • Biochemical Actions of Hormones V8

    • 1 Edición
    • Gerald Litwack
    • Inglés
    Biochemical Actions of Hormones, Volume VIII is an eight-chapter text that covers the developments in the understanding of the biochemical aspects of hormonal action and regulation. This volume examines first the messenger functions of calcium in hormonal systems. The next chapters deal with the neuronal regulation of blood pressure; the regulation of protein synthesis by phosphorylation; and the hormonal control of hepatic gluconeogenesis. These topics are followed by discussions on the effects of insulin in intracellular functions, the mechanisms of steroidal hormones, and the membrane recognition and effector sites in steroid hormone action. A chapter focuses on the activation of steroid-receptor complexes. The final chapters survey the estradiol and progesterone receptors in the human endometrium. This book will be of great value to biologists, biochemists, and researchers in the field of hormonal action.

  • Food And Energy Resources

    • 1 Edición
    • David Pimentel
    • Inglés
    Food and Energy Resources provides an understanding of the influence of energy, land, and water resources on food production. Future supplies of energy resources will have a major impact on the ability of humans to provide themselves with food. A better understanding of these issues will help society make sound choices and enable government leaders to develop and organize the necessary programs for the effective use of energy and food resources. The book begins with a discussion of the energy flow in the food system. This is followed by chapters that examine alternatives for the use of the external solar energy; the role of energy in world agriculture and food supply; the energy, land, and labor inputs in several major crop systems in northeastern China; and energy and food relationships in developing countries. Subsequent chapters deal with issues such as the use of renewable energy sources and the extent to which agricultural resources are used to produce food or fuel. This book will provide engineers, economists, agriculturists, geographers, ecologists, nutritionists, sociologists, and natural resource specialists a perspective that will help solve the problem of providing food for people while protecting natural resources.

  • Combustion, Flames and Explosions of Gases

    • 3 Edición
    • Bernard Lewis + 1 más
    • Inglés
    Combustion, Flames and Explosions of Gases, Third Edition provides the chemist, physicist, and engineer with the scientific basis for understanding combustion phenomena.

  • NMR of Chemically Exchanging Systems

    • 1 Edición
    • Jerome Kaplan
    • Inglés
    NMR of Chemically Exchanging Systems presents an integrated density matrix formalism for calculating NMR lineshapes for all types of exchanging systems. This book explores a variety of conditions, which is applicable to both liquids and liquid crystals. Organized into nine chapters, this book begins with an overview of the derivation of the absorption due to a single spin utilizing the classical Bloch equation as a means for introducing some of the concepts concerned in obtaining the absorption lineshape. This text then examines the derivation of the total density matrix equation. Other chapters consider the density matrix equation for a general exchanging system at high rf power and illustrate how one has to solve for all the elements of the density matrix. The final chapter presents some remarks on transients as applied to chemically exchanging systems. This book is a valuable resource for scientists and researchers who are interested in NMR spectroscopy.

  • General carbohydrate method

    • 1 Edición
    • Roy Whistler
    • Inglés
    Methods in Carbohydrate Chemistry, Volume VI: General Carbohydrate Methods contains a collection of selected methods from the entire field of carbohydrate chemistry. This volume is comprised of useful procedures in analytical and preparative carbohydrate chemistry. It is organized into 10 sections. The first section deals with methods for separation and analysis, which discusses chromatography and chemical, physical, and biochemical methods. Section II covers the preparation of mono- and polysaccharides and their derivatives. Section III describes a variety of oxidation methods. The fourth section is about procedures for the analysis of acyclic sugars. Sections V and VI present the etherification and esterification of carbohydrates. Nucleotides, nucleosides, and glycoside procedures are described in Sections VII and VIII. The ninth section focuses on radioactively labeled sugars. The final chapter provides a variety of physical methods such as mass spectrometry, nuclear magnetic resonance spectroscopy, and determination of molecular weights by osmometry. Chemists and biochemists will find this book very useful.

  • Chemical plant Taxonomy

    • 1 Edición
    • T Swain
    • Inglés
    Chemical Plant Taxonomy focuses on the classification of plants based on their chemical composition. Composed of contributions of authors, the text first considers the methods of plant taxonomy. Folk taxonomy; Linnaean and post-Linnaean taxonomy; Darwin and ""Evolutionary Taxonomy""; and the development of taxonomic practice are considered. The book continues with discussions on the theoretical and practical aspects of the ""species"" concepts and an outline of the history of chemical taxonomy. The selection also looks at the qualities of chemotaxonomy, the usefulness of chemistry in plant taxonomy, biosynthetic pathways, and the factors affecting the production of secondary plant products. The text discusses the distribution of alkanes. The isolation and characterization of alkanes; taxonomic applications of alkanes; biogenesis of alkanes; and fossil alkanes are discussed. The selection highlights the chemical taxonomy of acetylenic compounds, the distribution of fatty acids in plant lipids, distribution of aliphatic polyols, cyclitols, plant glycosides, and alkaloids. The text is a good source of information for readers wanting to study the taxonomy of chemical plants.

  • Stereo-Differentiating reactions

    The nature of asymmetric reactions
    • 1 Edición
    • Yoshiharu Izumi
    • Inglés
    Stereo-Differentiati... Reactions: The Nature of Asymmetric Reactions provides an introduction to asymmetric reactions. It brings together synthetic organic chemistry, stereochemistry, group theory, the theory of optical rotation, experimental methods, etc., all of which are basic to the study of stereo-differentiati... reactions, to form a unified approach based on the new concept of "differentiation." The authors hope that the value of the new concept, which is rather more complex than conventional treatments of asymmetric reactions, will become clear in the present book. This new concept should be useful in many fields of study, not only the development of stereo-differentiati... reactions, but also in the study of general reaction mechanisms in organic chemistry. The book contains nine chapters and begins with a historical background of studies on asymmetric reactions. This is followed by separate chapters on molecular symmetry and chirality; nomenclature for chirality, prochirality, and stereo-differentiati... reactions; the mechanisms of stereo-differentiati... reactions; methods for studying stereo-differentiati... reactions; and the basic principle of optical activity.

  • Biochemical Actions of Hormones V10

    • 1 Edición
    • Gerald Litwack
    • Inglés
    Biochemical Actions of Hormones, Volume X explores the important fields of recombinant DNA technology and nuclear matrix and their impact on biochemical endocrinology. This volume is organized into 12 chapters and begins with a presentation of an excellent model for determining the role of various receptors operating at the genetic level using cells in culture derived from the anterior pituitary. These topics are followed by a summary of conceptual advances in understanding nerve growth factor and related hormones, as well as the polypeptide hormones, which are recognized as growth factors for cells in culture. A chapter provides some insights into the pineal hormone, melatonin. The remaining chapters discuss the Ah carcinogen receptor, which seems to be analogous in many respects to a steroid receptor. These chapters also survey the various aspects of steroid receptors, including the specific acceptor sites in genes and their flanking sequences, the synthetic oligonucloetide acceptors for steroid receptor complexes, and the mechanisms of glucocorticoid resistance in leukemia. Biochemists, biologists, and research workers who are interested in biochemical aspects of endocrinology will find this book invaluable.

  • Coal Structure

    • 1 Edición
    • Robert Meyers
    • Inglés
    Coal Structure deals with the structure, mineral and organic components, and the physical and chemical properties of coal. The book is composed of papers that present a detailed and coherent description of both the physical and chemical structure of coal and the effect of coal structural features on coal processing. The contributions in the text discuss such topics as coal macerals, coal porosity, aromaticity, functional groups and heteroatoms in coal, polymer structure of coal, and mineral matter in coal. Engineers, researchers, scientists, and management personnel who are directly involved in the study and processing of coal will find the book a well-rounded reference source.

  • Activation, Deactivation, and Poisoning of Catalysts

    • 1 Edición
    • John Butt
    • Inglés
    Activation, Deactivation, and Poisoning of Catalysts deals with the circumstances and mechanisms underlying catalyst activation, deactivation, and poisoning. The emphasis is on the techniques for handling deactivating systems, not on results per se. Deactivation by fouling and sintering is given consideration. This book is organized into three sections and consists of 12 chapters. The first part is devoted to a systematic development of the manner in which catalysts are activated, deactivated, poisoned, and in some cases reactivated on a microscopic basis. The first chapter explains the concept of the active center as utilized in catalysis, along with catalyst regeneration, rejuvenation, and detoxification. In the second part, the reader is introduced to the problem of heat transfer as well as the transport of reactants and products in the interior of the particle coupled with chemical reaction therein. The macroscopic deactivation behavior of the catalyst particle is described in terms of fundamental kinetic deactivation phenomena and of parameters governing heat and mass transfer. The last part is primarily concerned with a collection of catalyst particles within the reactor, with emphasis on the global activity of the reactor. In the last chapter, a pragmatic approach is presented to predict the design and performance of chemical reactors containing a deactivating catalyst. This book is written for catalytic chemists, researchers, reactor designers, and students interested in catalyst activation, deactivation, and poisoning.

  • Metabolism of Sulfur Compounds

    • 3 Edición
    • David Greenberg
    • Inglés
    Metabolic Pathways, Third Edition: Volume VII: Metabolism of Sulfur Compounds deals with various aspects of the metabolism and biosynthesis of sulfur compounds such as coenzyme A, biotin, thiamine, and lipoic acid. The biochemistry of glutathione and the sulfur cycle is also discussed, together with sulfate activation and transfer; oxidative metabolism of cysteine and cystine in animal tissues; and enzyme defects in sulfur amino acid metabolism in humans. This volume is comprised of 15 chapters and begins with a discussion on the pathways of biosynthesis and dissimilation of coenzyme A, as well as the metabolic fate of exogenous coenzyme A in animals. The reader is then introduced to the chemistry, biosynthesis, metabolism, biological role, and biodegradation of biotin; the biosynthesis and function of thiamine; and the biosynthesis, dissimilation, and metabolic role of lipoic acid. Other sulfur compounds considered in this text are glutathione, cysteine and cystine, riboflavin, thiosulfate sulfurtransferase, mercaptopyruvate sulfurtransferase, and methionine. The final chapter is devoted to human diseases associated with enzyme defects in sulfur amino acid metabolism. This book will be a useful resource for biologists and biochemists.

  • The Porphyrins V5

    Physical Chemistry, Part C
    • 1 Edición
    • David Dolphin
    • Inglés
    The Porphyrins, Volume V: Physical Chemistry, Part C explores the physical chemistry of porphyrins, their precursors, catabolic derivatives, and related compounds. The book covers photochemical, electrochemical, and routes of electron transfer, as well as primary redox reactions of porphyrins and metalloporphyrins; oxygenation of hemoglobin and the interactions of metalloporphyrins with dioxygen; the kinetics of porphyrin metalation; and solid state phenomena. This volume is organized into 11 chapters and begins with an overview of electron transfer and the mechanisms of oxidation and reduction. The discussion then turns to porphyrin photochemical reactions and reversible electron transfer reactions of metalloporphyrins. Selected examples in which the oxidized or reduced complexes have been shown to play a biochemical role are provided. The following chapters focus on the isolation and characterization of the photosynthetic pigments and their aggregation and coordination properties, along with those of the porphyrins and metalloporphyrins. The book concludes with an analysis of solid state phenomena in porphyrins and related materials, paying particular attention to semiconduction, photoconduction, and superconduction. This book will be of value to inorganic, organic, physical, and biochemists interested in the physical chemistry of porphyrins.

  • Ion Exchange

    Theory and Application
    • 1 Edición
    • F.C. Nachod
    • Inglés
    Ion Exchange: Theory and Application focuses on the applications, complexities, and theoretical aspects of ion exchange. This book discusses the kinetics of fixed-bed ion exchange; fundamental properties of ion exchange resins; ion exchange equipment design; and ion exchange in water treatment. The multistage systems in ion exchange; desalting sea water; applications of ion exchange to the separation of inorganic cations; and ion exchange as a tool in analytical chemistry are also elaborated. This text likewise covers the metal concentration and recovery by ion exchange; catalytic application of ion exchangers; and use of ion exchange adsorbents in biochemical and physiological studies. Other topics include the separation of amino acids by ion exchange chromatography; sugar refining and by-product recovery; and ion exchange recovery of alkaloids. This publication is a good reference for chemists and students interested in ion exchange.

  • Chemical and Biochemical Applications

    • 1 Edición
    • Pierre Laszlo
    • Inglés
    NMR of Newly Accessible Nuclei, Volume 1: Chemical and Biochemical Applications is a 10-chapter text that explores the properties, advantages, developments, and chemical and biochemical applications of NMR technique. This book describes first the operation of an NMR spectrometer under its two aspects, namely, the instrumental and the computational aspects. The next chapters are devoted to some of the most important pulse sequences. The discussion then shifts to the various factors determining the position of the observed absorption and those responsible for the various relaxation processes. The last chapters deal with the specific applications of NMR, including in cation salvation, calcium-binding proteins, polyelectrolyte systems, halogens, and antibiotic ionophores. This book is of value to inorganic and analytical chemists, and biophysicists.

  • Biochemical Approaches to Aging

    • 1 Edición
    • Morton Rothstein
    • Inglés
    Biochemical Approaches to Aging covers the significant research studies on the biochemical aspects of aging. This book is composed of 11 chapters that consider several factors that affect cellular aging. The opening chapters present some model systems for the study of aging using different species, including mammals, nematodes, insects, and protozoa. The succeeding chapters deal with the role of free radical formation, lipid peroxidation, membranes, mitochondria, microsomes, and lysosomes in aging. These topics are followed by discussions of the DNA and RNA changes during aging; the mechanism of protein metabolism; and the alternation of proteins and enzymes. The concluding chapters examine the effect of aging on hormonal interaction and the biochemical effects of nutrition in aging. This book will prove useful to gerontologists, cell and molecular biologists, and researchers.

  • Biochemical Actions of Hormones V11

    • 1 Edición
    • Gerald Litwack
    • Inglés
    Biochemical Actions of Hormones, Volume XI is a 12-chapter text that covers the general and specific biochemical aspects of polypeptide and steroid hormones. The introductory chapters deal with the biochemical actions of the leukotrienes, the cyclic adenosine monophosphate, and the gonadotropin releasing hormone. The next chapters highlight detailed contributions on polypeptide hormone research. These chapters specifically tackle the insulin actions and the role of insulin in mammary gland development. The last series of chapters on steroid hormones includes X-ray crystallographic analysis of steroid structures and the significance of these studies on steroid-receptor interactions. These chapters also explore the analysis of the estrogen receptor with monoclonal antibodies; the role of estrogen receptor in responsive mammalian cells; the use of peroxidase as a marker of catechol estrogen action; and the activation and stabilization of the glucocorticoid receptor. This volume will be of great benefit to biochemists, biologists, endocrinologists, and researchers who are interested in the hormonal action and regulation.

  • Colloidal Gold

    Principles, Methods, and Applications
    • 1 Edición
    • Inglés
    Since its introduction in 1971, the development and application of colloidal gold as a marker in electron microscopy has been phenomenal. Colloidal gold has become the method of choice in immunocytochemistry and many areas of cell biology. This universal method is applicable to most microscopical systems including optical microscopy; scanning, transmission, and high voltage electron microscopy; photoelectron, photon, fluorescent darkfield, and epipolarization microscopy. Colloidal gold allows high and low resolution studies, enzyme and nucleic acid labeling, study of dynamic cellular processes, and virus detection. This book is among the first available to cover the principles and methodology of colloidal gold in microscopy.

  • A Biochemical Phylogeny of the Protists

    • 1 Edición
    • Mark Ragan
    • Inglés
    A Biochemical Phylogeny of the Protists covers a wide variety of biochemical characters and their usefulness in phylogenetics. This book is composed of 13 chapters that describe the methods of deducing phylogenies of protists from biochemical data. Protists are morphologically simple forms of life, including bacteria, fungi, many algae, protozoa, and sponges. The first chapters deal with the biochemistry, evolution, and phylogenetics of the protists. The subsequent chapters explore the DNA and RNA structure and the protein and enzyme content of some protists. Considerable chapters describe the various metabolic pathways in the protists. The remaining chapters other biochemical processes, including sulfate reduction, nitrogen utilization, and carbon monoxide production. These chapters also provide a summary of numerous research studies biochemical phylogeny. This book will prove useful to biochemists, microbiologists, researchers, and students.

  • Dispersing Powders in Liquids

    • 1 Edición
    • Volumen 7
    • R.D. Nelson
    • Inglés
    This book provides powder technologists with laboratory procedures for selecting dispersing agents and preparing stable dispersions that can then be used in particle size characterization instruments. Its broader goal is to introduce industrial chemists and engineers to the phenomena, terminology, physical principles, and chemical considerations involved in preparing and handling dispersions on a commercial scale. The book introduces novices to: - industrial problems due to improper degree of dispersion; - the nomenclature used in describing particles; - the basic physical phenomena, equations, and chemistry involved in particle interactions; - the analytical techniques used for evaluating solid-liquid interfaces - textbooks, courses, societies, and vendors that can provide an advanced understanding of dispersion phenomena. The book provides resources for more experienced technologists by: - discussing characteristics and applications of the various chemical classes of surfactants; - providing procedures for selecting and optimizing a dispersant for a specific solid-liquid system and end-use constraints; - naming typical commercial surfactants and listing the addresses and telephone numbers of their manufacturers; - illustrating the many physical and chemical equilibria that must be considered in modelling a dispersion and guiding the reader to the sources of both data and advanced theoretical treatments required to implement such models. The author has for several years been a consultant in the field of slurry technology, obtaining information, materials, equipment, and expert advice required to solve slurry problems. He also teaches slurry technology and powder dispersion courses to students who are either engineers recently graduated from college or managers recently transferred to plants that handle slurries. His expertise gives the book a wide appeal: as virtually every manufacturing process involves dispersions of powders in liquids, it is of interest to chemists and chemical engineers in industry; the concise definitions, descriptions and examples make it an ideal reference text for teachers and students.

  • Solvent Crazing of Polymers

    • 1 Edición
    • Volumen 13
    • A.L. Volynskii + 1 más
    • Inglés
    The problems related to crazing in polymers are of special interest to polymer scientists since only polymers display this universal phenomenon and no analogues are available for low-molecular-mass compounds. The important problems of solvent crazing and the development of a universal description of polymer structure and properties have received much attention from many leading scientists. Nevertheless, some aspects of polymer crazing are still unclear, and scientific activities in this area are in progress.This work provides an up-to-date account of scientific advances in the area of solvent crazing. The principal features and stages of solvent crazing (craze nucleation, craze tip advance, craze thickening, and craze collapse at high strains) are described. Additionally, the authors present information concerning the activities of Russian scientists in this area, which might have escaped the attention of their colleagues because of the language barrier.

  • Ring-Forming Polymerizations Pt A

    Carbocyclic and Metallorganic Rings
    • 1 Edición
    • Robert Cotter
    • Inglés
    Ring-forming Polymerizations, Part A: Carbocyclic and Metallorganic Rings covers polymerization reactions that form carbocyclic rings and those that lead to metallorganic ring-containing structures. This book is organized into 11 chapters. The first four chapters describe ring-forming polymerizations that lead to the formation of homocyclic carbon-containing rings. These chapters specifically examine Diels-Alder polymerizations and certain diisopropenyl monomers polymerization yielding high molecular weight polyindanes. Chapter V is an introduction to polymers from metals and unsaturated carbon compounds, which has been called a ""natural coordination polymer"". Chapters VI to X deal with metallorganic ring polymers formed by chelation and are arranged according to the elements in the ligands that are affecting chelation. The final chapter explores ring forming polymerizations that yield polysiloxanes, polysilazanes, and certain polymetalloxanes. This book will be of value to organic chemists and researchers, as well as to organic chemistry teachers and students.

  • Interfacial Phenomena

    • 2 Edición
    • J.T. Davies
    • Inglés
    Interfacial Phenomena explores the more primary properties of different liquid interfaces. This book is divided into eight chapters, where Chapter 1 establishes the basic concepts of the physics of surfaces, including the properties of matter in the surface layer. Chapters 2 and 3 further discuss the concepts of electrostatic and electrokinetic phenomena, respectively. Other areas discussed in the later chapters include adsorption at liquid interfaces; properties of monolayers; reactions at liquid interfaces; and mass transfer across interfaces. Chapter 8 discusses the more relevant aspects of disperse systems and adhesion as related to the interfacial properties discussed in the previous chapters. The text is a valuable source of information to students and researchers in the fields of chemistry, biology, and chemical engineering and can also be used for industrial and academic laboratories.

  • Anionic Polymerization: Principles and Practice

    • 1 Edición
    • Maurice Morton
    • Inglés
    Anionic Polymerization: Principles and Practice describes the unique nature of the anionic mechanism of polymerization. This book is composed of two parts encompassing 11 chapters that cover the aspects of the synthetic possibilities inherent in this system. Part I deals with the various aspects of anionic polymerization mechanism, including the monomers, initiators, solvents, and the involved initiation and propagation reactions. This part also describes the copolymerization and organolithium polymerization reactions of styrene and dienes. Part II explores the applications of anionic polymerization in polymer synthesis. This part specifically tackles the synthesis of narrow molecular weight, branched and α,ω-difunctional polymers, and block copolymers. Polymer chemists and researchers who work in the chemical industry and who would wish to utilize the unique features of anionic polymerization in the synthesis of new products will find this book invaluable.

  • Dust Explosions

    • 1 Edición
    • Volumen 4
    • P. Field
    • Inglés
    Handbook of Powder Technology, Volume 4: Dust Explosions presents the dust explosion problem in general terms and describes how and why dusts explode. This book discusses the various approaches used to deal with the dust explosion hazards. Organized into five chapters, this volume begins with an overview of the methods used to assess, remove, or minimize the hazard of dust explosions. This text then examines the factors that influence the initiation and severity of an explosion. Other chapters consider the explosion prevention and explosion protection techniques. This book discusses as well the characteristics of a dust explosion and the historical development of the problem. The final chapter deals with the significant concept of explosion protection to reduce the worst effects of an explosion to an acceptable level. This book is a valuable resource for managers, engineers, scientists, safety personnel, and others involved in the handling ad processing of materials in solid particulate form.

  • Wood a Agricultural Residues

    Research on Use For Feed, Fuels, and Chemicals
    • 1 Edición
    • Ed Soles
    • Inglés
    Wood and Agricultural Residues Research on Use for Feed, Fuels, and Chemicals covers the proceedings of the 1982 “Feed, Fuels, and Chemicals from Wood and Agricultural Residues” symposium, held in Kansas City and sponsored by Cellulose, Paper, and Textile Division of the American Chemical Society. Organized into seven parts encompassing 31 chapters, the book discusses the plant cell wall; the cellulose, hemicelluloses, and lignin; the lignocellulosics for ruminants; the biological and thermochemical conversion; and the approached for utilization. The introductory part describes the anatomy, permeability, ultrastructure, and digestion of plant cell wall. The following section examines the structure, characteristics, derivatives, recycle and recovery through solvent systems, and utilization for enzyme and protein production of cellulose and hemicelluloses. This section also discusses the synthesis, structure, properties, and analysis of hydroxypropyl lignin derivatives. The third section characterizes the fibrous fractions of forages and presents traditional methods for qualitative and quantitative analyses of lignocellulosics. This text includes discussions on methods for improving utilization of unconventional feed sources by ruminants; the digestion impeding factors; and the effect of chemical, physical, and biological treatments in upgrading the digestibility and nutritive value of crop residues. The subsequent sections describe the biological, chemical, physical, and thermochemical conversion of wood fibers. Such methods include fermentation, acid and steam hydrolysis, saccharification, hydrogenolysis, and pyrolysis. The concluding section covers mechanical treatments to improve lignocelluloses properties, such as steam explosion and solvent systems. This book is an ideal source of information for botanists and feed scientists and researchers.

  • Mixing V1

    Theory and Practice
    • 1 Edición
    • Vincent Uhl
    • Inglés
    Mixing: Theory and Practice, Volume 1 focuses on the mechanisms and applications of mixing in turbulent flow. This book discusses the theoretical and empirical methods that provide a basis for predicting the process as well as the mechanical performance characteristics of equipment used in different types of mixing operations. Comprised of five chapters, this volume starts with an overview of the mixing process, which tends to reduce gradients or nonuniformities in properties, composition, or temperature of materials in bulk. This text then explores the mixing operations that involve the transfer of a component to or from an equipment surface or boundary. Other chapters discuss the kinds of problems that occur in the design and use of mixing equipment, including the selection of size, type, and operating conditions. The final chapter deals with heat transfer where agitation is provided by mechanical devices. Development, design, and operating engineers will find this book extremely useful.

  • Gas Chromatography with Glass Capillary Columns

    • 2 Edición
    • Walter Jennings
    • Inglés
    The need for this second edition is dictated by developments that have occurred in this rapidly changing field and by sins of omission and sins of commission in the first edition. Projections available at the time of this writing indicate that gas chromoatography will remain the world's most widely used analytical technique for some time.

  • Anthocyanins as Food Colors

    • 1 Edición
    • Pericles Markakis
    • Inglés
    Anthocyanins as Food Colors aims to assemble scattered information on anthocyanins pertinent to food coloration. Both basic and applied aspects of these pigments are discussed. Organized into nine chapters, this book begins with a discussion of the chemical structure of anthocyanins, followed by its copigmentation and biosynthesis. It then discusses the distribution of anthocyanin in food plants, as well as the compounds' stability in food. This work also looks into the analysis of anthocyanins and their presence in grapes and wine. Utilization of anthocyanins as food additives is addressed in the last chapter. This book will provide additional information in order to maximize the visual appeal of these pigments both in products in which they are naturally present and in products to which they may be added as colorants.

  • Biochemical Aspects of Plant-Parasite Relationships

    Proceedings of The Phytochemical Society Symposium University of Hull, England April, 1975
    • 1 Edición
    • J. Friend
    • Inglés
    Biochemical Aspects of Plant-Parasite Relationships is a collection of papers from the Phytochemical Society Symposium of the same subject held at Hull in April 1975. This collection discusses biochemical research on the mechanisms involved in the invasion of plants by pathogens, the production of disease symptoms, and the mechanisms occurring in plant resistance against the invading microorganisms. Some papers discuss the genetics of fungal-plant interactions and the structural features of both infection and resistance processes, Such genetic interactions and structural features point to a biochemical reason for the plant-parasite interaction. Several attempts to correlate production of a cell wall degrading enzyme in vitro by a pathogen's virulence have shown great differences between in vitro and in vivo environments. One paper cites as an example the pathogens which produce both pectic hydrolases and lyases: the type of enzyme that is found to predominate often is actually associated with the pH of the environment. One paper also investigates nucleic acid transfer and the possible role of RNA in the host-parasite specificity. This collection can prove beneficial for microbiologists, biochemists, biotechnologists, plant biologists, and academicians connected with the biological sciences.

  • Kinetic and Thermodynamic Lumping of Multicomponent Mixtures

    • 1 Edición
    • G. Astarita + 1 más
    • Inglés
    Information necessary to solve scientific or engineering problems is often so vast, that the need arises to lump information together into a more manageable subset in order to proceed. The idea of lumping is one which is used, more or less consciously, in a large variety of fields. The thermodynamics and kinetic behavior of multicomponent mixtures is an area where the requirements of lumping have been clearly identified and the techniques and results of lumping have been analyzed in considerable detail. This book comprises the proceedings of a Symposium on Kinetic and Thermodynamic Lumping of Multicomponent Mixtures which was held at the American Chemical Society Meeting in Atlanta, GA, in April 1991. Papers presented at the symposium consisted of both invited and contributed papers. Each invited paper was a review of a subfield within the landscape of the symposium while the contributed papers contain detailed analyses of specific problems. The symposium brought together active researchers in this field to report on and discuss the progress which has been made in the lumping of mixtures of very many components for a number of different applications, and to identify the important problem areas which still remain. This volume will serve both as an introduction to anyone entering the field, and as a reference work for more experienced researchers.

  • Polymer Solutions, Blends, and Interfaces

    • 1 Edición
    • Volumen 11
    • I. Noda + 1 más
    • Inglés
    The behaviour of polymers in multi-component and multiphase systems such as solutions, blends and interfaces derived from both natural and synthetic sources and the subsequent influence of this on their physical properties is the theme of this book. Important new material on multiphase polymer systems such as block copolymers and liquid crystalline polymers is provided, and the solution and surface properties of enzymes and surface active polymers is described both theoretically and experimentally. The application of theory to the development of new cellulosic materials is particularly noteworthy. The relationship between end-use properties, such as adhesion, wetting, and colloidal stability, and molecular structure at the interface is addressed. Examples include the capillary pressure of nylon microporous membranes, a new technique for characterizing the adhesion between incompatible polymers, and the influence of the glass transition temperature at the fiber/matrix interface on interfacial shear strength.Characteriz... of polymer films, both electrochemically and via optical techniques is covered and the interactions of amphiphilic ions with polyacrylate polymer are described. The final two chapters introduce the topic of enzyme mobility at an interface and show how this may affect their role as biological catalysts.

  • Marine Natural Products V3

    Chemical And Biological Perspectives
    • 1 Edición
    • Poul Schever
    • Inglés
    Marine Natural Products: Chemical and Biological Perspectives, Volume III, reviews the state of knowledge in the chemistry and biology of marine natural products. It attempts to bring together timely and critical reviews that are representative of major current researches and that, hopefully, will also foreshadow future trends. The volume's first chapter discusses separation techniques, including liquid-liquid extraction, membrane separation, chromatography, capillary gas chromatography, and high-performance liquid chromatography. This is followed by a chapter on amino acids that have been isolated from marine algae. Kainic acid, for instance, is a well-established ascaricide that was isolated from a red alga that had been known as an anthelmintic for a thousand years. Only recently, however, has it been recognized as a valuable tool in neurophy sinology. Subsequent chapters deal with nitrogenous pigments in marine invertebrates; and the phenomenon of bioluminescence, which is relatively rare among terrestrial organisms, but which is widespread among marine biota.

  • Tropical Fruit Processing

    • 1 Edición
    • Jethro Jagtian
    • Inglés
    Tropical Fruit Processing focuses on the improved food preservations methods of tropical fruits for lesser developed and developed countries. This book covers four tropical fruits, namely, guava, mango, papaya, and passion fruit. These fruits have the greatest growth potential based on the knowledge and technology acquired in their cultivation, processing, and preservation. Each chapter in this book discusses the botany, cultivars, horticulture, harvesting, handling, storage, composition, packing, and processing of the fruit. A variety of processed products from these fruits, such as jellies, jams, preserves, purees, sauces, and juices, are also covered. Furthermore, this book describes various food preservation methods including dehydration, concentration, and canning. This book is an invaluable resource for scientists, technologists, manufacturers, students, and others concerned with cultivating, processing, manufacturing, research, development, or marketing of foods.

  • Marine Natural Products V1

    Chemical And Biological Perspectives
    • 1 Edición
    • Poul Schever
    • Inglés
    Marine Natural Products: Chemical and Biological Perspectives, Volume I, reviews the state of knowledge in the chemistry and biology of marine natural products. It brings together critical reviews and new perspectives for the marine research community. The book's opening chapter discusses the isolation, distribution, chemistry, pharmacology, and public health aspects of dinoflagellate toxins. This is followed by separate chapters on algal nonisoprenoids, algal sesquiterpenoids, terpenoids from marine sponges, and uncommon marine steroids.

  • Assembly Instructions for Nucleic Acid Models

    • 1 Edición
    • Edward Barrett
    • Inglés
    Assembly Instructions for Nucleic Acid Models describes the step-by-step instructions in building a single nucleotide using the Academic Press/Molecular Design Inc. (AP/MDI) models. This booklet also provides instructions for constructing models of the DNA-B (Watson-Crick), DNA-A, and the DNA-Z forms. This text illustrates the chemical composition and atom numbering system of the nucleotide unit, the fundamental building block of all nucleic acids. The framework components include the atomic pieces for phosphorous, oxygen, carbon, nitrogen, and the fused pieces that represent two bases and two furanose rings. Building models of the different nucleic acid structure involves adjustments of seven torsion angles; in the AP/MDI Molecular Model System, only six angles are adjusted. In constructing larger DNA structures, the operator assembles a series of nucleotide units. He should also be familiar with the seven torsion angles of these structures which are composed of six adjustable angles and the correct ring conformation. This guide also contains a table listing the torsion angles for several forms of DNA. This booklet is suitable for students in chemistry, new chemist practioners, professors in chemistry, as well as other researchers whose works involve some chemical investigations and experiments.

  • The Elements of Polymer Science and Engineering

    An Introductory Text for Engineers and Chemists
    • 1 Edición
    • Alfred Rudin
    • Inglés
    This introductory text is intended as the basis for a two or three semester course in synthetic macromolecules. It can also serve as a self-instruction guide for engineers and scientists without formal training in the subject who find themselves working with polymers. For this reason, the material covered begins with basic concepts and proceeds to current practice, where appropriate.

  • Physiology and Electrochemistry of Nerve Fibers

    • 1 Edición
    • Ichiji Tasaki
    • Inglés
    Physiology and Electrochemistry of Nerve Fibers explores the properties of nerve fibers, including morphology, biochemistry, and physical chemistry. The book also makes an effort to trace the origins of the concepts that are important in studying the physiology of the nerve fibers. The text covers the early studies of electrochemistry; the different theories regarding nerve excitation; the conduction of nerve impulses along different nerve fibers; and the behavior of impulses in myelinated nerve fibers and its electrical excitation. The book also discusses the emergence, morphology, and biochemistry of the squid giant axon, as well as further studies about it; macromolecular transitions; the physiochemical approach and model; and the electrochemical considerations of the classical membrane theory. The monograph is intended for doctors specializing in neurology, psychologists, and psychiatrists who wish to know more about nerve fibers, their structure, chemical properties, functions, and the theories behind it, as well as its transmission of electrical impulses.

  • Fine Particles

    Aerosol Generation, Measurement, Sampling, and Analysis
    • 1 Edición
    • Benjamin Y.H. Liu
    • Inglés
    Fine Particles: Aerosol Generation, Measurement, Sampling, and Analysis is a collection of technical papers presented at the Symposium on Fine Particles held in Minneapolis, Minnesota, on May 28-30, 1975. The symposium aims to explore the developments in instrumentation and experimental techniques for aerosol studies. This book is organized into four parts encompassing 34 chapters that focus on fine particles below about 3.5 µm in diameter. Part I presents the research and development in Europe and Japan on fine particles and aerosols, as well as the aerosol standards development work at the Particle Technology Laboratory, University of Minnesota. This part also includes calibration studies on condensation nuclei counters and the diffusion battery. Significant chapters in Part II are devoted to the common techniques for generation of aerosols of various sizes, from fine particles to monodisperse aerosols. This part further looks into the equipment limitations and problems in producing fine particle aerosols for life testing air cleaning systems and for weather modification experimentation. Part III describes the techniques and equipment used for size-selective aerosol sampling in terms of the design principles applied, the correspondence between design and performance of specific samplers, their applicability to field conditions, and their ability to satisfy sampler acceptance criteria. Part IV deals first with the methods for determination of aerosol properties, including their optical, electrical, and spectral properties. Other chapters examine the principles, mode of operation, and application of processes and instruments for aerosol studies.

  • Biochemical Actions of Hormones V2

    • 1 Edición
    • Gerald Litwack
    • Inglés
    Biochemical Actions of Hormones, Volume II is a 12-chapter text that surveys the significant developments toward understanding the primary effects of hormones in cellular receptors at the molecular level. This book starts with an overview of the genetic regulation by hormones and the role of cyclic adenosine monophosphate in hormonal response. These topics are followed by discussions on the hormone-dependent molecular mechanisms, which appear to participate in the regulation of cell proliferation and differentiation in this model system, as well as how multiple hormonal signals may serve to integrate a large number of complex regulatory mechanisms. A chapter deals with the comparative aspects of the physiology and biochemistry of insulin, with an emphasis on the molecular mode of action of insulin on metabolic processes. The remaining chapters deal with the physiology, mechanism of action, and biological effects of various hormones, including catecholamines, glucocorticoids, estrogens, progestins, gonadotropins, prolactin, adrenocorticotropic hormone, 25-hydroxycholecalci... and insect hormones. Endocrinologists will find this book invaluable.

  • Enzymes in Food Processing

    • 2 Edición
    • Gerald Reed
    • Inglés
    Enzymes in Food Processing, Second Edition provides an understanding of the action of enzymes and the changes in enzyme technology. This book discusses the introduction of enzyme processes into the food industry. Organized into 20 chapters, this edition starts with an overview of the practical application of enzymes to the manufacture and processing of foods, such as the use of enzymes to clarify wine, produce dextrose, tenderize meat, and liquefy candy centers. This book then discusses the variables that affect all enzymes, which include moisture content, temperature, and pH. This text examines as well the different characteristics of competitive and noncompetitive inhibitions. Other chapters focus on the properties and actions of carbohydrases, which cause the chemical bonds to unite simple sugars into the polymeric saccharides. The final chapter deals with the allergic reactions that commercial enzymes may cause to humans. Microbiologists, food technologists, nutritionists, and food scientists will find this book extremely useful.

  • Chemical and Biochemical Applications of Lasers V5

    • 1 Edición
    • C. Bradley Moore
    • Inglés
    Chemical and Biological Applications of Lasers, Volume V focuses on the laser applications in photochemistry and spectroscopy. This book examines the spectroscopic detection of single atoms and explores the purification of industrial chemicals. Organized into seven chapters, this volume starts with an overview of the methods developed for laser detection of single atoms, including fluorescence, photoionization, photodeflection, and their combinations. This text then discusses the methods of high resolution spectroscopy, which provide detailed information on molecular structure and reaction kinetics studies. Other chapters review several laser photodissociation studies, which explain dissociation dynamics. This book discusses as well the possibilities for selective photochemical reactions and examines the potential of lasers for practical application in chemical processing. The final chapter considers the various metals that can undergo a photochemical change in oxidation state in ordinary solvents. This book is a valuable resource for physicists, chemists, electrochemists, photochemists, electrical engineers, and chemical engineers.

  • Plants, Chemicals and Growth

    • 1 Edición
    • F.C. Steward
    • Inglés
    Plants, Chemicals and Growth focuses on chemicals that regulate the growth and development of plants. It explores the problems of growth and growth regulation by looking at the roles of chemical substances, natural and synthetic, which affect the behavior of the cells of flowering plants. It also describes the variety of responses triggered by such chemicals, which include herbicides, those that stimulate the rooting of cuttings or cause leaf or fruit abscission, and those associated with fruit setting and artificial parthenocarpy. Comprised of 10 chapters, this volume begins with an overview of examples of chemical regulators and the biological responses they induce in plants, from tropism and chemotropism to nastic responses; rhythmic phenomena in growth and development; initiation of lateral organs and problems of phyllotaxy; periodicities in growth; and effects on the balance between vegetative growth, flowering, and fruiting. It discusses the totipotency and exogenous regulation of cells, history and modern concepts of plant growth regulators, the ways chemicals induce growth in quiescent cells, and growth-regulating effects in free cell systems. The reader is also introduced to biologically active compounds, such as indolyl and triazine compounds; how plant-regulating substances work; concepts and interpretations of plant growth regulation; and problems and prospects of chemical regulation of plant growth and development. This book will be of interest to teachers, biology students, agriculturalists, and researchers.

  • Turbulence and Molecular Processes in Combustion

    • 1 Edición
    • T. Takeno
    • Inglés
    An understanding of the intricacies in the turbulent combustion process may be a key to solving many of the current energy and environmental problems. The essential nature of turbulent combustion can be derived from the interaction between stochastic flow fluctuations and deterministic molecular processes, such as chemical reaction and transport processes. Undoubtedly, this is one of the most challenging fields of engineering science today, requiring as it does the interaction of scientists and engineers in the respective fields of chemical kinetics and fluid mechanics. The 28 papers in this volume review recent advances in these two disciplines providing new insights into the fundamental processes, addressing a great deal of recent progress. This progress ranges from descriptions of elementary chemical kinetics, to working those descriptions into combustion calculations with large numbers of elementary steps, to improved understanding of turbulent reacting flows and advances in simulations of turbulent combustion. The contributions will inspire further research on many fronts, advancing the understanding of combustion processes, as well as fostering a growing interdisciplinary cooperation.

  • Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography

    • 1 Edición
    • Walter Jennings
    • Inglés
    Qualitative Analysis of Flavor and Fragrance Volatiles by Glass Capillary Gas Chromatography deals with the application of glass capillary gas chromatography to qualitative analysis of flavor and fragrance volatiles. Topics range from gas chromatographic system requirements and retention indices to selective detectors, ancillary reactions, and gas chromatography-mass spectrometry. This text is comprised of six chapters; the first of which provides an overview of the use of glass capillary gas chromatography in qualitative analysis of flavor and fragrance volatiles. The discussion then turns to gas chromatographic system requirements with respect to columns, inlets, detectors, and temperature control. The reader is also introduced to the Kovats retention index system, which utilizes a logarithmic scale to describe the retention behavior of a compound relative to that of the n-paraffin hydrocarbons. The use of selective detectors, such as thermal conductivity, flame ionization, nitrogen-phosphorus, electron capture, and photoionization detectors in qualitative analysis, is also considered. The final two chapters focus on ancillary reactions in glass capillary gas chromatography and general considerations in gas chromatography-mass spectrometry, including interfacing. This book is intended primarily for researchers involved in studies of the volatile constituents of fragrances, food, and natural products.

  • Biochemical Actions of Hormones V9

    • 1 Edición
    • Gerald Litwack
    • Inglés
    Biochemical Actions of Hormones, Volume IX is an 11-chapter text that provides the developments in the theoretical and experimental understanding of hormonal actions and regulation. After presenting an overview of research on peptide and steroid hormones, this volume goes on exploring the lipotropins and their active degradation products, as well as the adenylate cyclase enzyme regulation by adrenergic receptors. These topics are followed by discussions on the potassium ion conductance in the pancreatic beta cell; the concept of the insulin sensitive chemoreceptor of the central nervous system; the estrogen-induced growth factors and their role in tumor cell growth; and the nuclear acceptors for the avian progesterone receptor. Other chapters consider the structural aspects of steroid hormones and their receptors, with an emphasis on the importance of pyridoxal phosphate research studies on a better understanding of the steroid receptors function. This book also looks into an affinity label for glucocorticoid receptors and the development of a polyclonal antibody for this receptor. The concluding chapter emphasizes the regulation of the steroid sulfotransferases. This volume will be of great value to biologists, biochemists, and researchers who are interested in the biochemical aspects of hormones.

  • Computers in Chemical and Biochemical Research V2

    • 1 Edición
    • C.E. Klopfenstein
    • Inglés
    Computers in Chemical and Biochemical Research, Volume 2, provides a suitable medium permitting communication of important results of workers in computer-assisted chemistry. The present volume complements its predecessor and includes reviews and original articles about a variety of topics not dealt with earlier. The scope of the series is broad and the articles are designed to provide coverage of state-of-the-art advances and to prevent wasteful duplications of effort. The book contains seven chapters and opens with a survey of the field of pattern recognition in chemistry along with past and future directions. This is followed by separate chapters covering an on-line graphics system as a teaching aid in physical chemistry; financial and hardware analysis and specifications of laboratory minicomputer systems; and the use of these principles in the automation of a clinical laboratory. Subsequent chapters deal with the use of new technology in automation of two specific types of experimental apparatus; and computer automation in gas-liquid chromatography.

  • Rheological Phenomena in Focus

    • 1 Edición
    • Volumen 4
    • D.V. Boger + 1 más
    • Inglés
    More than possibly any other scientific discipline, rheology is easily visualized and the relevant literature contains many excellent photographs of unusual and often bizarre phenomena. The present book brings together these photographs for the first time. They are supported by a full explanatory text. Rheological Phenomena in Focus will be an indispensable support manual to all those who teach rheology or have to convince colleagues of the practical relevance of the subject within an industrial setting. For those who teach fluid mechanics, the book clearly illustrates the difference between inelastic fluids and viscoelastic fluids in a number of important flow fields. For example, the influence of the configuration of molecules in an entry flow, the influence of rounding corners, the reluctance of elastic liquids to turn corners, and the sensitivity of elastic fluids to asymmetries in the flow are clearly illustrated. In addition many flow instabilities, where fluid elasticity is clearly the dominant variable, are shown.

  • The Porphyrins V7

    Biochemistry, Part B
    • 1 Edición
    • David Dolphin
    • Inglés
    The Porphyrins, Volume VII: Biochemistry, Part B is devoted to the biochemistry of porphyrins, their precursors, and related compounds. The book covers the structure and function of the major heme proteins and their reconstitution and metal substitution, along with proteins derived from green photosynthetic bacteria. This volume is organized into 11 chapters and begins with an introduction to the cytochrome oxidase, paying particular attention to its isolation and characterization as well as biosynthesis. The discussion then turns to the electron transfer functions of cytochromes b and c; the structure of cytochrome c; and the proposed structures for peroxidases, catalases, and chloroperoxidase. The following chapters explore the biochemical mechanism and control of the catalytic function of cytochrome P-450 and associated electron transport chains, metal substitution in hemoglobin and myoglobin, and reconstitution experiments on various hemoproteins with particular attention to the removal of heme and reassembly into a heme-protein complex, along with protein folding around the heme. This book will be of interest to inorganic, organic, physical, and biochemists involved in the study of the biochemistry of porphyrins.

  • Biochemical and Clinical Aspects of Oxygen

    • 1 Edición
    • Winslow Caughey
    • Inglés
    Biochemical and Clinical Aspects of Oxygen contains the proceedings of a symposium held on the Pingree Park Campus of Colorado State University on September 24-29, 1978. Contributors discuss the biochemical and clinical aspects of oxygen, focusing on reactions and areas relating to heme, flavin, copper and nonheme iron proteins, organ transplants, carbon monoxide formation and detoxification, oxidant drugs and pollutants, oxygen toxicity, enzyme inactivation, lipid peroxidation, membrane destruction, antioxidants, cataractogenesis, mutagen and carcinogen formation, malaria and trypanosome parasites, and inflammation. This volume is organized into 51 chapters and begins with a discussion of bonding and reactions of dioxygen bound to hemeproteins, along with the pathophysiology of hemolysis due to unstable hemoglobins. The focus then turns to the reactivity and function of leghemoglobin, reduction of oxygen and five redox forms of horseradish peroxidase, and acid-base catalysis and hydrogen bonding in reactions mediated by peroxidases. The reader is methodically introduced to the ligands of cytochrome P-450 and their role in the activation of dioxygen, oxygen and catabolite regulation of hemoprotein biosynthesis in yeast, and factors controlling hemoprotein reactivity. A chapter describing the spectroscopic mapping of oxygen supply and demand in the heart concludes the book. This book will be of interest to biochemists, biophysicists, physicians, toxicologists, immunologists, physiologists, parasitologists, radiologists, and environmentalists.

  • The Analysis and Control of Less Desirable Flavors in Foods and Beverages

    • 1 Edición
    • George Charalambous
    • Inglés
    The Analysis and Control of Less Desirable Flavors in Foods and Beverages contains the proceedings of a symposium held in August 1980 at the Second Chemical Congress of the North American Continent under the auspices of the Agricultural and Food Chemistry Division of American Chemical Society. The papers explore advances in the analysis and control or prevention of less desirable taste and aroma factors in foods and beverages such as fish and shellfish, meat, cheese, soy proteins, corn syrup, water, citrus juices, milk, and beer. This book is comprised of 15 chapters and begins with a review of advances in the separation of volatile components, particularly with respect to gas chromatography. The reader is then introduced to methods and procedures for analysis and control of less desirable flavors in fish and shellfish, meat, cheese, corn syrup, soy proteins, citrus juices, milk, beer, and wine. The analysis and control of taste and odor of public water supplies which are used commonly for food processing and manufacture are also considered. Furthermore, the techniques used to minimize, remove, or mask the bitter flavor that arises unintentionally during enzymatic hydrolysis of proteins are described. This monograph will be a useful resource for students, chemists, and food technologists, as well as growers, processors, fabricated food and beverage manufacturers, brewers, wine makers, distillers, and consumers.

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