Download or read book Organic Acids written by Cesar Vargas and published by Nova Science Publishers. This book was released on 2016-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic acids are compounds with acidic properties and occur naturally in a number of foods. They are mainly present in fermented products as a result of hydrolysis, biochemical metabolism, and microbial activity. This book provides research on the characteristics, properties and synthesis of organic acids. Chapter One reviews the application of organic acids in food preservation. Chapter Two provides a chromatographic analysis organic acids in food from animal origin. Chapter Three discusses the diversity of organic acids content in green and roasted Coffea arabica cultivars. Chapter Four studies the effects of organic acids and polysaccharides on the solubility of oyster-derived zinc digested in vitro. Chapter Five examines the evaporation of organic acids aqueous solutions through spread films of polyelectrolyte/surfactant complexes. Chapter Six discusses the influence of liquid absorption and the effect of downstream pressure on the separation performance of pervaporation of acetic acid aqueous solutions.
Download or read book pKa Prediction for Organic Acids and Bases written by D. Perrin and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many chemists and biochemists require to know the ionization constants of organic acids and bases. This is evident from the Science Citation Index which lists The Determination of Ionization Constants by A. Albert and E. P. Serjeant (1971) as one of the most widely quoted books in the chemical literature. Although, ultimately, there is no satisfactory alternative to experimental measurement, it is not always convenient or practicable to make the necessary measure ments and calculations. Moreover, the massive pK. compilations currently available provide values for only a small fraction of known or possible acids or bases. For example, the compilations listed in Section 1. 3 give pK. data for some 6 000--8 000 acids, whereas if the conservative estimate is made that there are one hundred different substituent groups available to substitute in the benzene ring of benzoic acid, approximately five million tri-substituted benzoic acids are theoretically possible. Thus we have long felt that it is useful to consider methods by which a pK. value might be predicted as an interim value to within several tenths of a pH unit using arguments based on linear free energy relationships, by analogy, by extrapolation, by interpolation from existing data, or in some other way. This degree of precision may be adequate for many purposes such as the recording of spectra of pure species (as anion, neutral molecule or cation), for selection of conditions favourable to solvent extraction, and for the interpretation of pH-profiles for organic reactions.
Download or read book Organic Acids and Food Preservation written by Maria M. Theron and published by CRC Press. This book was released on 2010-09-16 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although organic acids have been used to counteract pathogens in food for many years, there is a glaring need to assess and improve their continued effectiveness and sustainability. There is also a growing demand for foods that are produced using milder treatments (e.g., less heat, salt, sugar, and chemicals) and newer technologies to prevent the g
Download or read book Organic Acids in Man written by R. Chalmers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: The writing of this book was prompted by the need for a comprehensive of current data on organic acids suitable for both newcomers and collection established researchers in this field. The only previous text of the kind was the excellent review by Nordmann and Nordmann (1961), and at that time the main method of analysis was paper chromatography with liquid chromatography being used in a limited way. Only three diseases in which organic acids accumulate were known (primary hyperoxaluria, phenylketonuria and alcaptonuria). Since then, with the development of gas chromatography and mass spectrometry, and the further development ofliquid chromatography, knowledge concerning the nature of the organic acids in physiological fluids has been greatly extended. At the same time, the number of organic acidurias has increased dramatically, there being now some 40-50 known diseases of this type. During the past 15 years or so, there have been several reviews, dealing with either specific diseases or groups of diseases (Gompertz, 1972, 1974; Tanaka, 1975), or presenting the proceedings of symposia (Stern and Toothill, 1972) or workshops (Marner et al. , 1974). This present text deals comprehensively and in detail with the organic acids in human physiological fluids in health and in disease states, and is particularly concerned with the methods necessary for their separation, determination and indentification.
Download or read book Organic Acids in Geological Processes written by Edward D. Pittman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: In May of 1991, Victor Van Buren, who was then with Springer Verlag in New York City, asked us for timely topics in the earth sciences that would be appropriate for publication as a book. We all quickly agreed that recent interest and research activity on the role of organic acids in geological processes would make a timely book on this diverse and controversial topic. As coeditors, we outlined chapter topics for such a book that maintained a good balance between geological and geochemical interests. Specific authors were then sought for each of the chapter topics. We had exceptional success in getting leading researchers as authors, and their response was universally enthusiastic. This approach has been most gratifying in that it provides a cohesion and conciseness that is not always present in books representing compilations of papers from symposia. This book does not resolve the controver sies that exist regarding the significance of organic acids in geolog ical processes. However, it does present both sides of the controver sies in terms of available data and current interpretations. Readers may judge for themselves and envisage research necessary to resolve these controversies in the future. We thank the authors of this book for their participation, dedication, and cooperation. We are also grateful for support from Dr. Wolfgang Engel and his staff at Springer-Verlag (Heidelberg) in expediting the editing and publication of this book in a timely manner.
Download or read book Chiral Lewis Acids in Organic Synthesis written by Jacek Mlynarski and published by John Wiley & Sons. This book was released on 2017-10-23 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete overview covering the application of metal-based chiral Lewis acids from all parts of the periodic table, the Author emphasizes the most recent contributions to the field as well as prominent direction of development. The book discusses the design of chiral complexes as well as a wide spectrum of reactions promoted by various chiral Lewis acids, including water-compatible acids as well as the most important applications in the chemical and pharmaceutical industries. A must-have for catalytic and organic chemists working in the field, both in academia and industry, as well as pharmaceutical and medicinal chemists.
Download or read book Recent Advances in Natural Products Analysis written by Seyed Mohammad Nabavi and published by Elsevier. This book was released on 2020-03-07 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Advances in Natural Products Analysis is a thorough guide to the latest analytical methods used for identifying and studying bioactive phytochemicals and other natural products. Chemical compounds, such as flavonoids, alkaloids, carotenoids and saponins are examined, highlighting the many techniques for studying their properties. Each chapter is devoted to a compound category, beginning with the underlying chemical properties of the main components followed by techniques of extraction, purification and fractionation, and then techniques of identification and quantification. Biological activities, possible interactions, levels found in plants, the effects of processing, and current and potential industrial applications are also included. Focuses on the latest analytical techniques used for studying phytochemical and other biological compounds Authored and edited by the top worldwide experts in their field Discusses the current and potential applications and predicts future trends of each compound group
Download or read book Organic Chemistry of Nucleic Acids written by N. Kochetkov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of nucleic acids is one of the most rapidly developing fields in modern science. The exceptionally important role of the nucleic acids as a key to the understanding of the nature of life is reflected in the enormous number of published works on the subject, including many outstanding monographs and surveys. The pathways of syn thesis and metabolism of nucleic acid,s and the many and varied biological functions of these biopolymers are examined with the utmost detail in the literature. Nearly as much attention has been paid to the macromolecular chemistry of the nucleic acids: elucidation of the size and shape of their molecules, the study of the physicochemical properties of their solutions, and the appropriate methods to be used in such research. The surveys of the chemistry of nucleic acids which have been published so far deal almost entirely with their synthesis and, in particular, with the synthetic chemistry of monomers (nucleosides and nucleotides) ; less attention has been paid to the synthesis of poly nucleotides. There is yet another highly important aspect of the chemistry of nucleic acids which is still in the formative stage, the study of the reactivity of nucleic acid macromolecules and their components. This can make an important contribution to the deter mination of the structure of these remarkable biopolymers and to the correct understanding of their biological functions.
Download or read book Boronic Acids written by Dennis G. Hall and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, the whole field of organoboronic acids is presented in one comprehensive handbook. Professor Dennis Hall, a rising star within the community, covers all aspects of this important substance class, including applications in chemistry, biology and medicine. Starting with an introduction to the structure, properties, and preparation of boronic acid derivatives, together with an overview of their reactions and applications, the book goes on to look at metal-catalyzed borylation of alkanes and arenas, coupling reactions and rhodium-catalyzed additions of boronic acids to alkenes and carbonyl compounds. There follows chapters on copper-promoted C-O and C-N cross-coupling of boronic acids, recent applications in organic synthesis, as well as alpha-haloalkylboronic esters in asymmetric synthesis. Later sections deal with cycloadditions, organoboronic acids, oxazaborolidines as asymmetric inducers, and boronic acid based receptors and sensors. The whole is rounded off with experimental procedures, making this invaluable reading for organic, catalytic and medicinal chemists, as well as those working in organometallics.
Download or read book Food Biotechnology 1 written by R. D. King and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biotechnology in its many guises has developed very considerably over the last few years. We now feel that it is appropriate for the publication of a series of books that discuss the technical aspects of biotechnology specifically as applied to foods, and in particular concentrating on new and emerging techniques, processes and products. Food is without doubt one of the oldest bioindustries; however, some of the new areas of biotechnology, such as diagnostic and health-care applications, are likely to mature much faster than applications in the food industry. Eventually, however, biotechnology must have a very great impact on a wide scale in the food industry, simply because of the size and diversity of the industry, and because most food products are substantially natural in origin and are therefore very suitable for processing by biocatalysts. Some of the ways in which the food industry is likely to be affected by developments in biotechnology include the following: The modification of food components to give products with new and/or improved properties, for instance high fructose corn syrups, and by modifying the functional properties of proteins. New methods of assaying food constituents, such as immobilized enzyme sensors. New processes for the production of foods and food components, for instance the use of plant cell cultures for the production of flavours. Many of these topics will be described in detail in this series of books.
Download or read book Dietary Nutrients Additives and Fish Health written by Cheng-Sheng Lee and published by John Wiley & Sons. This book was released on 2015-06-22 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fish nutrition can be the deciding factor between a robust and healthy farmed fish population and low aquaculture production. In an age where chemicals and antibiotics are under greater scrutiny than ever, a strong understanding of the role of nutrients and feed additives is essential in the aquaculture industry. Dietary Nutrients, Additives and Fish Health is a comprehensive review of dietary nutrients, antinutritional factors and toxins, and non-nutrient dietary additives, and their effects on fish performance and immune system function, as well as overall health. The book opens with an overview of fish immune systems and health. Subsequent chapters delve into proteins and amino acids, lipids and fatty acids, carbohydrates, beta glucans, vitamins, minerals, antinutrients, mycotoxins, nucleotides, prebiotics, probiotics, organic acids and their salts, and plant extracts and their impacts on fish health, growth, and development. The text then concludes with a chapter on feeding practices. Authored by leaders in aquaculture, Dietary Nutrients, Additives and Fish Health will be an invaluable resource to graduate students, researchers and professionals alike.
Download or read book Microbial Organic Acids Production written by Amit Kumar and published by Walter de Gruyter GmbH & Co KG. This book was released on 2024-01-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lewis Acids and Selectivity in Organic Synthesis written by M. Santelli and published by CRC Press. This book was released on 1995-11-21 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lewis acids provide inexpensive access to elaborated molecules obtained with high selectivities (regio-, stereo-, and enantioselectivity). Lewis Acids and Selectivity in Organic Synthesis is the first book to deal with these new and promising roles of Lewis acids. The book begins with general considerations on Lewis acids and a description of Lewis acid-carbonyl complexes, which are involved in most of the reactions described: ene reactions, allylsilane and allyltin addition to carbonyl compounds, addition of nucleophiles to acetals, conjugated addition of allylsilanes and allyltins to unsaturated carbonyl compounds (Sakurai reaction), and Diels-Alder reaction. Subsequent chapters examine these issue in detail, with special attention given to the way Lewis acids induce diastereo- and enantioselectivity. The extensive use of schemes (approximately 1000) ensures rapid visual uptake of the information. Lewis Acids and Selectivity in Organic Synthesis serves as a valuable source of information for all who face the challenge of selectivity in organic synthesis.
Download or read book Organic Chemistry written by Michael B. Smith and published by CRC Press. This book was released on 2022-09-23 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the premise that many, if not most, reactions in organic chemistry can be explained by variations of fundamental acid–base concepts, Organic Chemistry: An Acid–Base Approach provides a framework for understanding the subject that goes beyond mere memorization. Using several techniques to develop a relational understanding, it helps students fully grasp the essential concepts at the root of organic chemistry. This new edition was rewritten largely with the feedback of students in mind and is also based on the author’s classroom experiences using the previous editions. Highlights of the Third Edition Include: Extensively revised chapters that improve the presentation of material. Features the contributions of more than 65 scientists, highlighting the diversity in organic chemistry. Features the current work of over 30 organic chemists, highlighting the diversity in organic chemistry. Many new reactions are featured that are important in modern organic chemistry. Video lectures are provided in a .mov format, accessible online as a ‘built-in’ ancillary for the book. The homework is available online, gratis to all users. The third edition of Organic Chemistry: An Acid–Base Approach constitutes a significant improvement upon a unique introductory technique to organic chemistry. The reactions and mechanisms it covers are the most fundamental concepts in organic chemistry that are applied to industry, biological chemistry, biochemistry, molecular biology, and pharmacy. Using an illustrated conceptual approach rather than presenting sets of principles and theories to memorize, it gives students a more concrete understanding of the material.
Download or read book Organic Chemistry written by Michael B. Smith and published by CRC Press. This book was released on 2016-03-09 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the premise that many, if not most, reactions in organic chemistry can be explained by variations of fundamental acid–base concepts, Organic Chemistry: An Acid–Base Approach provides a framework for understanding the subject that goes beyond mere memorization. Using several techniques to develop a relational understanding, it helps students fully grasp the essential concepts at the root of organic chemistry. This new edition was rewritten largely with the feedback of students in mind and is also based on the author’s classroom experiences using the first edition. Highlights of the Second Edition Include: Reorganized chapters that improve the presentation of material Coverage of new topics, such as green chemistry Adding photographs to the lectures to illustrate and emphasize important concepts A downloadable solutions manual The second edition of Organic Chemistry: An Acid–Base Approach constitutes a significant improvement upon a unique introductory technique to organic chemistry. The reactions and mechanisms it covers are the most fundamental concepts in organic chemistry that are applied to industry, biological chemistry, biochemistry, molecular biology, and pharmacy. Using an illustrated conceptual approach rather than presenting sets of principles and theories to memorize, it gives students a more concrete understanding of the material.
Download or read book Lignocellulosic Biorefining Technologies written by Avinash P. Ingle and published by John Wiley & Sons. This book was released on 2020-04-13 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: A text to the advances and development of novel technologies in the production of high-value products from economically viable raw materials Lignocellulosic Biorefining Technologiesis an essential guide to the most recent advances and developments of novel technologies in the production of various high-value products from economically viable raw materials. Written by a team of experts on the topic, the book covers important topics specifically on production of economical and sustainable products such as various biofuels, organic acids, enzymes, biopigments, biosurfactants, etc. The book highlights the important aspects of lignocellulosic biorefining including structure, function, and chemical composition of the plant cell wall and reviews the details about the various components present in the lignocellulosic biomass and their characterizations. The authors explore the various approaches available for processing lignocellulosic biomass into second generation sugars and focus on the possibilities of utilization of lignocellulosic feedstocks for the production of biofuels and biochemicals. Each chapter includes a range of clear, informative tables and figures, and contains relevant references of published articles. This important text: Provides cutting-edge information on the recent developments in lignocellulose biorefinery Reviews production of various economically important and sustainable products, such as biofuels, organic acids, biopigments, and biosurfactants Highlights several broad-ranging areas of recent advances in the utilization of a variety of lignocellulosic feedstocks Provides a valuable, authoritative reference for anyone interested in the topic Written for post-graduate students and researchers in disciplines such as biotechnology, bioengineering, forestry, agriculture, and chemical industry, Lignocellulosic Biorefining Technologies is an authoritative and updated guide to the knowledge about various biorefining technologies.
Download or read book Organic Acids in Naturally Colored Surface Waters written by William Luther Lamar and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical study of the organic acids in naturally colored surface waters.
