Search results for: plant-polyphenols

Plant Polyphenols

Author : Richard W. Hemingway
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This book was developed from the proceedings of the 2nd North American Tan nin Conference held in Houghton, Michigan, June, 1991. The objective of this con ference was to bring together people with a common interest in plant polyphenols and to promote interdisciplinary interactions that will lead to a bet ter understand ing of the importance of these substances. Another objective of this conference was to extend the 'tannin family' by making special efforts to encourage participation by scientists outside the United States, obtain more coverage of the hydrolyzable tannins, and further broaden the scope of coverage from the initial concentration on forestry and forest products. Com parison of the contents of this book with 'Chemistry and Significance of Condensed Tannins' that resulted from the proceedings of the 1st North American Tannin Conference shows the degree that these objectives were met. In developing the second conference, care was taken to assure that this book extends rather than duplicates the coverage of the first conference. Therefore, the two books should be taken together to obtain an up to date coverage of the broad area of chemistry and significance of plant polyphenols. Our thanks go to the authors who so kindly contributed chapters and so pa tiently responded to our requests. We thank the Conference Assistance Staff of Michigan Technological University for their help in planning and conducting the conference.

Plant Polyphenols

Author : Edwin Haslam
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Plant Polyphenols 2

Author : Georg G. Gross
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This volume summarizes current research on the influence of plant polyphenols on human health, promoting collaboration between chemists and biologists to improve our understanding of their biological significance, and expanding the possibilities for their use.

Antioxidant and Anti aging Action of Plant Polyphenols

Author : Christophe Hano
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Polyphenols are plant non-nutrient natural products, or plant secondary metabolites, found in fruits, vegetables and seeds that we consume daily. Their intakes from fruit, vegetables, seeds, and nuts are associated with lower risks of chronic and age-related degenerative diseases. Aging is a dynamic and complex biological process involving multiple actors and subject to a number of genetic and/or environmental influences. The famous free radical theory of aging proposed by Prof. Harman in 1956 states that free radicals lead to oxidative damage, causing cellular dysfunction and physiological decline, and are responsible for aging, with the appearance of degenerative diseases and eventually death. From this hypothesis, antioxidant molecules are capable of slowing down the aging process through the successful scavenging of radical oxygen and nitrogen species. Polyphenols have been shown to prolong the lifespan of different model species operating through a well-conserved antioxidant mechanism. This collection of research and review articles covers the most recent advances in the use of plant polyphenols, ranging from their biological properties and possible functions as medicines, the importance of traditional medicines as a source of inspiration, the rationalization of new uses of plant extracts which lead to applications in modern medicine, the status of modern green-chemistry extraction methods, to some reflections on future prospects.

Chemistry and Biology of Ellagitannins

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Antioxidant Activity of Polyphenolic Plant Extracts

Author : Dimitrios Stagos
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“Antioxidant Activity of Polyphenolic Plant Extracts” is a collection of scientific articles regarding polyphenols, that is, substances occurring naturally in plants and exhibiting many beneficial effects on human health. Among polyphenols’ interesting biological properties, their antioxidant activity is considered the most important. This book brings together experts from different research fields on topics related to polyphenols, such as their isolation and purification, assessment of their antioxidant activity, prevention from oxidative stress-induced diseases and use as food additives. The polyphenols used in the present studies are derived from a great variety of plants, ranging from well-known species to rare ones that are only found in specific regions. Moreover, some of the studies provide evidence that polyphenols may be used for the prevention and treatment of common diseases such as diabetes mellitus, Alzheimers’ disease, cardiovascular and intestinal diseases. Importantly, in several of the studies “green extraction methods” for the isolation of polyphenols were developed using modern technologies, where few or no organic solvents were used, in order to minimize environmental and health impacts.

Polyphenols Properties Recovery and Applications

Author : Charis Michel Galanakis
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Polyphenols: Properties, Recovery, and Applications covers polyphenol properties, health effects and new trends in recovery procedures and applications. Beginning with coverage of the metabolism and health effects of polyphenols, the book then addresses recovery, analysis, processing issues and industrial applications. The book not only connects the properties and health effects of polyphenols with recovery, processing and encapsulation issues, but also explores industrial applications that are affected by these aspects, including both current applications and those under development. Covers the properties and health effects of polyphenols, along with trends in recovery procedures and applications Addresses recovery, analysis and processing issues Concludes with coverage of the industrial applications of polyphenols

Polyphenols in Plants

Author : Ronald Ross Watson
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Polyphenols in Plants: Isolation, Purification and Extract Preparation, 2nd edition, provides a detailed insight into polyphenols that occur naturally in plants and how they can be affected during growth and development, then effectively removed and optimized for various applications in food production. Historically, plants have been the major sources for drugs and health promotion. While there are a small number of nutrients contained, the growing focus is on the very diverse, complex ring structures: polyphenols that are not nutritious. In order to study or use them in patient treatment, the polyphenols need to be isolated, identified, and purified for application and study. This book brings together experts in the field who share their ongoing examination of isolation and purification of polyphenols as well as determination of their structures and composition. Polyphenols in Plants covers a range of new topics including polyphenols in vegetable waste and agricultural byproducts, extraction methods and characterization of polyphenols, and isolation techniques in the development of new compounds and their use in cancer therapy. This book will be useful to plant scientists and dietary supplement producers, as well as scientists in the food industry and alternative medicine who are interested in the specific health benefits of various dietary extracts and other polyphenol resources. Fully revised and updated to present the latest developments in the field Advances understanding of isolation, characterization, and identification of critical polyphenols vital to industrial development as therapies Defines conditions of growth affecting polyphenol levels Describes techniques critical to identifying and defining polyphenols

Recent Advances in Polyphenol Research

Author : Jess Reed
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RECENT ADVANCES IN POLYPHENOL RESEARCH Plant polyphenols are secondary metabolites that constitute one of the most common and widespread groups of natural products. They are essential plant components for adaptation to the environment and possess a large and diverse range of biological functions that provide many benefits to both plants and humans. Polyphenols, from their structurally simplest forms to their oligo/polymeric versions (i.e. tannin and lignin), are phytoestrogens, plant pigments, antioxidants, and structural components of the plant cell wall. The interaction between tannins and proteins is involved in plant defense against predation, cause astringency in foods and beverages, and affect the nutritional and health properties of human and animal food plants. This seventh volume of the highly regarded Recent Advances in Polyphenol Research series is edited by Jess Dreher Reed, Victor Armando Pereira de Freitas, and Stéphane Quideau, and brings together chapters written by some of the leading experts working in the polyphenol sciences today. Topics covered include: Chemistry and physicochemistry Biosynthesis, genetics and metabolic engineering Roles in plants and ecosystems Food, nutrition and health Applied polyphenols Distilling the most recent and illuminating data available, this new volume is an invaluable resource for chemists, biochemists, plant scientists, pharmacognosists and pharmacologists, biologists, ecologists, food scientists and nutritionists.

Tanning Chemistry

Author : Anthony D Covington
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Even in the 21st Century, the manufacture of leather retains an air of the dark arts, still somewhat shrouded in the mysteries of a millennia old, craft based industry. Despite the best efforts of a few scientists over the last century or so, much of the understanding of the principles of tanning is still based on received wisdom and experience. Leather is made from (usually) the hides and skins of animals - large animals such as cattle have hides, small animals such as sheep have skins. The skin of any animal is largely composed of the protein collagen, so it is the chemistry of this fibrous protein and the properties it confers to the skin with which the tanner is most concerned. In addition, other components of the skin impact on processing, impact on the chemistry of the material and impact on the properties of the product, leather. Therefore, it is useful to understand the relationships between skin structure at the molecular and macro levels, the changes imposed by modifying the chemistry of the material and the eventual properties of the leather. This book aims to contribute to changing the thinking in the industry, to continue building a body of scientific understanding, aimed at enhancing the sustainability of an industry which produces a unique group of materials, derived from a natural source. The Science of Leather is the only current text on tanning science, and addresses the scientific principles which underpin the processes involved in making leather. It is concerned with the chemical modification of collagen, prior to tanning and the tanning reactions in particular. The subject is covered in the following order: collagen chemistry, collagen structure, skin structure, processing to prepare for tanning, the tanning processes and processing after tanning. The aim of the book is to provide leather scientists and technologists with an understanding of how the reactions work, the nature of their outcomes and how the processes can be controlled and changed. The objective is to synthesise a scientific view of leather making and to arrive at an understanding of the nature of tanning - how the wide range of chemistries employed in the art can change the properties of collagen, making leather with different properties, especially conferring different degrees of stabilisation as measured by the hydrothermal stability. Environmental issues are not treated as a separate theme - the impact of leather making on the environment is a thread running through the text, with the assumption that better understanding of the science of leather making will lead to improved processing. The book also reflects on the ways leather technology may develop in the future based on the foundation of understanding the scientific principles which can be exploited. It also includes a subject index, references and a glossary. The book provides the reader with insights into the role science plays in leather technology and provides fundamental understanding, which should be the basis for scientific and technological research and development for the benefit of the global leather industry. The book is aimed at students, leather scientists and technologists, in both academia and industry, in leather production and in chemical supply houses.

Chemistry and Biology of Ellagitannins

Author : Stephane Quideau
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This book is the first of its kind that focuses on the chemistry and biology of ellagitannins, a special class of naturally occurring polyphenols which have so far not received the attention they deserve. These polyphenolic substances are found in many plants, including numerous food sources. They not only exhibit unique structural features that fascinate most chemists who are aware of their existence, but also express remarkable biological activities that have yet to attract the interest of the pharmaceutical industry. This is surprising because ellagitannins have been identified as active principles in traditional Chinese medicines.

Advances in Planar Lipid Bilayers and Liposomes

Author : A. Leitmannova Liu
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The lipid bilayer is central to life, as all living organisms possess a lipid bilayer structure, thereby underlying the lipid bilayer principle of biomembranes. The lipid bilayer principle and its applications are the main theme of this new book series. This new series on bilayer lipid membranes (BLMs and liposomes) include invited chapters on a broad range of topics, from theoretical investigations, specific studies, experimental methods, to practical applications. Written for newcomers, experienced scientists, and those who are not familiar with these specific research areas, the Series covers all aspects of lipid bilayer investigations, both fundamental and applied. * Covers a broad range of topics ranging from theoretical research, specific studies, experimental methods, to practical applications * Authoritative timely reviews by experts in this field * Indispensable source of information for new scientists

Polyphenols in Human Health and Disease

Author : Ronald Ross Watson
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Polyphenols in Human Health and Disease documents antioxidant actions of polyphenols in protection of cells and cell organelles, critical for understanding their health-promoting actions to help the dietary supplement industry. The book begins by describing the fundamentals of absorption, metabolism and bioavailability of polyphenols, as well as the effect of microbes on polyphenol structure and function and toxicity. It then examines the role of polyphenols in the treatment of chronic disease, including vascular and cardiac health, obesity and diabetes therapy, cancer treatment and prevention, and more. Explores neuronal protection by polyphenol metabolites and their application to medical care Defines modulation of enzyme actions to help researchers see and study polyphenols’ mechanisms of action, leading to clinical applications Includes insights on polyphenols in brain and neurological functions to apply them to the wide range of aging diseases

Studies in Natural Products Chemistry

Author : Athanasios Valavanidis
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Plant polyphenols are considered among the most abundant phytochemicals that are present in human diets, and their regular consumption has been associated with reduced risk of a number of chronic diseases, including cancer, and cardiovascular and neurodegenerative disorders. In the past decades, plant polyphenols have drawn increasing scientific attention due to their potent antioxidant and other properties and their marked effects in the prevention of various oxidative stress-associated diseases. Recently, the polyphenolic extracts from different plants have become a major area of health- and medical-related research. This review provides an update and comprehensive overview of various plant polyphenolic compounds, and the quantification of their antioxidant properties, anticancer activities, and therapeutic effects. Also, the review discusses the current scientific knowledge of various plant polyphenols to inhibit tumorigenesis in animal models and to modulate cell signaling pathways involved in inflammation and the development of malignant tumors, and related biochemical interventions in cell function under both normal and pathological conditions. We present in vitro and in vivo studies (in experimental animals) in which polyphenols showed increased anticancer potential. Also, numerous epidemiological research data and findings from human intervention studies, as well preclinical studies supporting cancer prevention mechanisms. Lastly, we present recent clinical trials for anticancer action of certain polyphenols that showed promising anticancer and therapeutic properties.

Plant Polyphenols

Author :
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Medicinal Plant Research in Africa

Author : Victor Kuete
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The pharmacopoeias of most African countries are available and contain an impressive number of medicinal plants used for various therapeutic purposes. Many African scholars have distinguished themselves in the fields of organic chemistry, pharmacology, and pharmacognosy and other areas related to the study of plant medicinal plants. However, until now, there is no global standard book on the nature and specificity of chemicals isolated in African medicinal plants, as well as a book bringing together and discussing the main bioactive metabolites of these plants. This book explores the essence of natural substances from African medicinal plants and their pharmacological potential. In light of possible academic use, this book also scans the bulk of African medicinal plants extract having promising pharmacological activities. The book contains data of biologically active plants of Africa, plant occurring compounds and synthesis pathways of secondary metabolites. This book explores the essence of natural substances from African medicinal plants and their pharmacological potential The authors are world reknowned African Scientists.

Application of Polyphenols in Foods and Food Models

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Phenolic compounds are secondary metabolites found in legumes, grains, fruits, algae, leaves and many other dietary sources. However, the abundance and differences in chemical structure, solubility, toxicological safety and, therefore, bioactivity and functional effects in humans. This book covers the basic chemical composition and structure of phenolic compounds and focus on their technological applications in food models and products: nondairy and dairy beverages, bakery, and meat-based foods. Additionally, food preservation aspects, including the effects of polyphenols additions on the product’s shelf-life, processing and recovery of polyphenols from plant materials, antioxidant and antiproliferative aspects of polyphenol-rich extracts are considered and holistically debated. Toxicological safety of polyphenols in foods is explained and discussed Application of polyphenols in dairy and nondairy foods is discussed Effects of polyphenols on food preservation/shelf-life are explained

Studies on Psychiatric Disorders

Author : Anna Dietrich-Muszalska
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This authoritative volume reviews clinical, pathophysiological and therapeutic aspects of oxidative and nitrosative stress in different psychiatric disorders such as schizophrenia, bipolar disorder, autism, and attention deficit hyperactivity disorder (ADHD). Twenty-nine comprehensive chapters are divided into three distinct sections: clinical aspects, pathophysiological aspects, and therapeutic aspects. Together, these chapters present the environmental, genetic and neurodevelopmental factors in the generation of oxidative stress in psychiatric disorders, with particular emphasis on the biochemical changes associated with oxidative stress in dopaminergic and glutamate neurotransmission as well as mitochondrial dysfunction in the brain and peripheral cells. Through an investigation of glutamic acid decarboxylase (GAD) abnormalities in schizophrenia, the book provides a coherent framework to account for the impact of oxidative stress on pathological phenomena ranging from cellular to cognitive and clinical aspects. It describes biomarkers of oxidative damage, the role of oxidative stress in numerous abnormalities of biochemical pathways in the pathophysiology of schizophrenia, the development of new investigative techniques, specially neuroimaging, and studies of apoptotic pathways that seem to prove neurodegenerative and neurodevelopmental theories. Written by leading researchers in their fields, Studies on Psychiatric Disorders explores therapeutic approaches with aspects of various antioxidants, cryostimulation, and hyperbaric oxygen treatment in oxidative stress in neuropsychiatric diseases. The volume also discusses the role of antipsychotics in the treatment of schizophrenia on nitric oxide generation and biomarkers of oxidative stress together with the clinical symptomatology. Overall, it proposes that novel therapeutic strategies such as supplementation with antioxidants—in particular polyphenols, ω-3 fatty acids or combination of both—could be effective for long-term treatment of some neuropsychiatric disorders.

Recent Advances in Polyphenol Research

Author : Celestino Santos-Buelga
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Recent Advances in Polyphenol Research Volume 2 Edited by Santos-Buelga, Escribano-Bailon and Lattanzio Plant phenolics are secondary metabolites that constitute one of the most common and widespread groups of substances in plants. Polyphenols have a large and diverse array of beneficial effects on both plants and animals. For example they are famous as antioxidants, hormones, constituents of essential oils and natural neurotransmitters. Sponsored by Groupe Polyphenols, this publication, which is the second volume in this ground-breaking series, is edited by Celestino Santos-Buelga, Maria Teresa Escribano-Bailon, and Vincenzo Lattanzio, who have drawn together an impressive list of internationally respected authors, each providing cutting edge chapters covering some of the major topics of recent research and interest. Information included in this important new addition to the series include the following areas: • Flavonoid chemistry of the leguminosae • Chemistry and biological activity of ellagitannins • Chemistry and function of anthocyanins in plants • An update of chemical pathways leading to new phenolic pigments during wine ageing • Metabolic engineering of the flavonoid pathway • The translation of chemical properties of polyphenols into biological activity with impacts in human health • Plant phenolic compounds controlling leaf movement • Biological activity of phenolics in plants Chemists, biochemists, plant scientists, pharmacognosists and pharmacologists, food scientists and nutritionists will all find this book an invaluable resource. Libraries in all universities and research establishments where these subjects are studied and taught should have copies on their shelves.

Studies in Natural Products Chemistry

Author : Atta-ur-Rahman
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Studies in Natural Products Chemistry: Bioactive Natural Products (Part I) contains articles written by leading authorities in their respective fields of research. It presents current frontiers and future guidelines for research based on important discoveries made in the field of bioactive natural products. Volume 28 is part of a great family of useful reference books Illustrates the types of critical discoveries that emerge from the interface of chemistry and biology Contributions are from well-respected authors