Download or read book Isolation and Structure Elucidation of Bioactive Secondary Metabolites from Microbial Sources written by Kate J. Graham and published by . This book was released on 1994 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbial organisms often produce biologically active and chemically intriguing secondary metabolites. To isolate and characterize compounds of novel activity and structure, bioassay- guided fractionations were employed on a variety of natural products sources. Active compounds were characterized by spectroscopic analysis and X-ray diffraction methods. As a result of these studies, six projects were completed, resulting in the purification of a diverse range of compounds containing activity in a variety of assays. A coumarin and parahydroxyphenylethanol were determined to possess phytotoxic activity from fungal pathogens. Two novel C-glycosidic compounds from a bacterial plant pathogen were found to be the first low molecular weight elicitors of the hypersensitive response in plants. A verticillin of the epi-polythiodiketopiperazine class isolated from a soil fungus was discovered to be responsible for inhibition of ras farnesylation transferase. Leafcutter ants were found to be deterred by the presence of a novel sesqualterpenoid in epiphylls. Finally, inhibitors of the PDGF receptor were isolated and characterized from a lichen.
Download or read book Isolation and Structure Elucidation of Bioactive Compounds Dedicated to the memory of the late Professor Charles D Hufford written by Muhammad Ilias and published by MDPI. This book was released on 2019-04-11 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are very pleased to introduce the Book Version of our Special Issue in Molecules dedicated to the memory of the late Professor Dr. Charles D. Hufford. The issue has been a huge success, with 22 full-length peer-reviewed papers and a tribute by Professor Alice M.Clark. Authors, reviewers, and collaborators from many countries across the worldhave contributed to this endeavour, and we are truly grateful to all. This Special Issue isrepresentative of the broad impact that “Charlie” had on the field of bioactive naturalproducts. This Special Issue comprises papers from Professor Hufford’s former students,colleagues, and collaborators throughout the world who have utilized a wide array ofstate-of-the-art techniques to examine diverse natural sources to isolate and identify avariety of natural products with a wide spectrum of biological activities, including somenew microbial transformations and insights into bioactive molecules. Many new bioactive compounds are described and reported here for the first time. Bioactivities reportedinclude cytotoxicity, antimicrobial activity, anti-inflammatory activity, antileishmanialactivity, antitrypanosomal activity, antimalarial activity, analgesic activity, and beneficialliver activities, just to name a few. This Special Issue will undoubtedly have a lasting impact on the field of bioactive natural products, as exemplified by the career of Dr. Hufford. Lastly, without the timely and outstanding contributions from all of you, this Special Issue would not have been possible. We thank you all very much for your contributions and your time devoted to this Special Issue in memory of a special person. Finally, we express ourgratitude and thanks to the journal Molecules and their excellent team of expert reviewers for giving us the support and opportunity to make this Special Issue a huge success!
Download or read book Secondary Metabolites written by Ramasamy Vijayakumar and published by BoD – Books on Demand. This book was released on 2018-09-05 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book consists of an introductory overview of secondary metabolites, which are classified into four main sections: microbial secondary metabolites, plant secondary metabolites, secondary metabolites through tissue culture technique, and regulation of secondary metabolite production. This book provides a comprehensive account on the secondary metabolites of microorganisms, plants, and the production of secondary metabolites through biotechnological approach like the plant tissue culture method. The regulatory mechanisms of secondary metabolite production in plants and the pharmaceutical and other applications of various secondary metabolites are also highlighted. This book is considered as necessary reading for microbiologists, biotechnologists, biochemists, pharmacologists, and botanists who are doing research in secondary metabolites. It should also be useful to MSc students, MPhil and PhD scholars, scientists, and faculty members of various science disciplines.
Download or read book Isolation Structure Elucidation and Biological Evaluation of Natural Products from Plants and Fungi written by Xiaoning Wang and published by . This book was released on 2012 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural products have provided considerable value for drug discovery over the past half-century. Nearly four fifth of drugs were natural products or inspired by natural compounds. Bioactive secondary metabolites isolated from natural source, either fungal or terrestrial, are relatively safer for human health and the environment and can serve as drug or as drug leads for the development of synthetic or semi-synthetic analogs. Natural products have also been successfully used in agriculture as plant growth regulators, signal transductions, fungicides, herbicides and tranquilizers. In our continued efforts to identify bioactive compounds, seventy-seven plant and fungal extracts were evaluated using a direct-bioautography assay coupled with three Colletotrichum species to detect antifungal metabolites. Three crude extracts that showed significant antifungal activity were selected for further bioassay-guided isolation. Various chromatographic techniques including preparative thin layer chromatography, vacuum liquid chromatography, flash chromatography, high pressure liquid chromatography and over pressure layer chromatography were utilized to isolate biologically active secondary metabolites from natural products of fungal and plant origin. Among all the techniques, over pressure layer chromatography were first adopt here for preparative isolation of natural products. It turned out to be a rapid and efficient method of exploiting co-migrating bioactive metabolites, and eleven compounds including two new molecules were isolated by using this technique. The structure of the isolated compounds was elucidated through various spectroscopic methods, including high-resolution mass spectrometry, one and two-dimensional nuclear magnetic resonance spectroscopy. Finally, the isolated compound was submitted for several in vitro assays, including antifungal, herbicidal, antibacterial, and cannabinoid and opioid receptor agonist assays. Some compounds showed potent antifungal activity against strawberry pathogens and one compound also showed good herbicidal and antibacterial activity. These compounds could be exploited as drug leads to potential agrochemicals or pharmaceuticals. All the promising drug leads have been submitted for antifungal testing using 24-well strawberry leaf disc assay.
Download or read book Bioactive Marine Natural Products written by Dewan S. Bhakuni and published by Springer Science & Business Media. This book was released on 2006-06-30 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioactive Marine Natural Products is the first book available that covers all aspects of bioactive marine natural products. It fills the void in the literature for bioactive marine natural products. The book covers various aspects of marine natural products and it is hoped that all the major classes of bioactive compounds are included. Different classes of marine organisms and the separation and isolation techniques are discussed. The chemistry and biology of marine toxins, peptides, alkaloids, nucleosides and prostanoids are discussed in detail. Biological, toxicological and clinical evaluations are also dealt with to ensure that the book may be adopted at any stage by any practicing organic chemist or biologist, working in academia or in R and D divisions of pharmaceutical companies. Each chapter in the book includes an abstract to highlight the major points discussed in the text and concluding remarks are given. References to books, monographs, review articles and original papers are provided at the end of each chapter.
Download or read book Biological Activity of Natural Products written by Jaroslava Švarc-Gajić and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many thousands of years ago, humans were introduced to the toxicants of minerals and plants of microbial origin, and since that time, natural bioactive compounds have been used in traditional medicine for treating different health conditions, but also as aphrodisiacs and as a means of suicide or murder. Modern medicine acknowledges natural bioactive compounds as valuable medicinal sources for both diagnostic and curative purposes. Natural compounds serve as templates for the production of new drugs with improved pharmacological properties. This book explains the term bioactivity and deals with the bioactive compounds of plants, animals, microbial and marine origin. Their use by traditional medicinal approach, as well as by modern medicine is further elaborated. Both beneficial and toxic properties of different chemical classes, including alkaloids, peptides, terpenoids, bioactive amines etc., are described. Their isolation at the industrial scale is presented through several technological processes which are explained in detail for several compound classes. The research explains how natural sources can be exploited my modern and traditional medicine, and presents the risks and benefits associated with their use. In addition, a new approach to studying bioactivity, that includes computational modelling and softwares for in silico description and prediction, is explained. A chemometric approach to studying bioactivity is demonstrated through several models given for some natural bioactive compounds and their derivatives.
Download or read book Antifouling Compounds written by Nobuhiro Fusetani and published by Springer Science & Business Media. This book was released on 2006-10-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Awareness of the dangers of toxic components in antifouling coatings has raised interest in the potential for nontoxic alternatives. Marine organisms from bacteria to invertebrates and plants use chemicals to communicate and defend themselves. This book explores natural based antifoulants, their ecological functions, methods of characterisation and possible uses in antifouling. The text takes on the challenge of identifying such compounds, designing sustainable production and incorporating them into antifouling coatings.
Download or read book Biodiversity of Marine Microbes written by Savvas Genitsaris and published by MDPI. This book was released on 2021-08-31 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book entitled “Biodiversity of Marine Microbes” aims at highlighting the significance of marine microbes as primary producers, their contribution in complex ecological processes and their roles in biogeochemical cycles and ecosystem functioning. The book includes five research papers covering the diversity and composition of marine microbial communities representing all three domains of life in various marine environments, including coastal eutrophic areas, ice waters, and lagoons. One paper examines the diversity and succession of bacterial and archaeal communities from coastal waters in mesocosm experiments. The combination of classical tools with novel technological advances implemented in the methods of the papers offered an opportunity to answer fundamental questions and shed light on the complex and diverse life of marine microbes.
Download or read book Plant derived Natural Products written by Anne E. Osbourn and published by Springer Science & Business Media. This book was released on 2009-07-07 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants produce a huge array of natural products (secondary metabolites). These compounds have important ecological functions, providing protection against attack by herbivores and microbes and serving as attractants for pollinators and seed-dispersing agents. They may also contribute to competition and invasiveness by suppressing the growth of neighboring plant species (a phenomenon known as allelopathy). Humans exploit natural products as sources of drugs, flavoring agents, fragrances and for a wide range of other applications. Rapid progress has been made in recent years in understanding natural product synthesis, regulation and function and the evolution of metabolic diversity. It is timely to bring this information together with contemporary advances in chemistry, plant biology, ecology, agronomy and human health to provide a comprehensive guide to plant-derived natural products. Plant-derived natural products: synthesis, function and application provides an informative and accessible overview of the different facets of the field, ranging from an introduction to the different classes of natural products through developments in natural product chemistry and biology to ecological interactions and the significance of plant-derived natural products for humans. In the final section of the book a series of chapters on new trends covers metabolic engineering, genome-wide approaches, the metabolic consequences of genetic modification, developments in traditional medicines and nutraceuticals, natural products as leads for drug discovery and novel non-food crops.
Download or read book Bioactive Compounds from Natural Sources written by Corrado Tringali and published by CRC Press. This book was released on 2003-09-02 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in obtaining biologically active compounds from natural sources has recently spiked due to their low toxicity, complete biodegradability, availability from renewable sources, and in most cases, low cost. Taking an interdisciplinary approach, Bioactive Compounds from Natural Sources: Isolation, Characterization, and Biological Properties covers general methods and main topics in the research field of bioactive natural products. The book describes general screening methods, modern HPLC hyphenated techniques, and NMR methods in the structural elucidation of compounds and devotes individual chapters to specific topics of research. Surveys on compounds displaying important pharmacological activities are presented in chapters devoted to Mexican medicinal plants, anti-tumor drugs of natural origin, cancer chemopreventive flavonoids, and metabolites displaying anti-HIV, antioxidative, antimalarial, and anti-inflammatory activity. The final chapters are devoted to representative examples of research into marine metabolites: immunomodulating marine glycolipids and surveys of bioactive compounds from marine opisthobranchs and Japanese soft corals. With its focus on modern approaches to the isolation of biologically active natural products, this book encourages interdisciplinary work among chemists, pharmacologists, biologists, botanists, and agronomists with an interest in bioactive natural products.
Download or read book The discovery of bioactive natural products The isolation and structural elucidation genome mining OSMAC strategy and biotransformation written by Ling Liu and published by Frontiers Media SA. This book was released on 2023-08-30 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tools and Applications of Biochemical Engineering Science written by K. Schügerl and published by Springer. This book was released on 2003-07-01 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This special volume "Tools and Applications of Biochemical Engineering Science" is dedicated to Professor Wolf-Dieter Deckwer on the occasion of his 60th bir- day. It was a great pleasure for me to act together with Professor Karl Schtigerl as volume editor and to present here a collection of 11 outstanding review articles written mainly by former students, associates, colleagues and friends of Wolf- Dieter Deckwer. The title of this special volume well reflects the research interests and sci- tific pursuit of Wolf-Dieter Deckwer during his more than 20 years’ work in the area of biochemical engineering, particularly during the last 15 years when he was the head of the Biochemical Engineering Division of GBF (German Nat- nal Research Center for Biotechnology). He has decisively pushed the devel- ment not only of "software tools" ranging from analytical means and mathe- tical models for monitoring and understanding cellular processes to gene expression systems for designing microorganisms, but also of "hardware tools" such as computer control systems, bioreaction and separation devices for eff- tively producing a variety of bioproducts on semi-production scale. New developments in some of these important tools in biochemical engineering are reviewed in articles included in this volume. Wolf-Dieter Deckwer was among the leading biochemical engineers who timely pointed out the necessity of applying these tools in an integrated manner for bioprocess development. By establishing "Integrated Bioprocess Development" as one of the GBF main - search topics as early as 1990 he also actively promoted this idea.
Download or read book Bioactive Natural Products From Microbes Isolation Characterization Biosynthesis and Structure Modification written by Xiachang Wang and published by Frontiers Media SA. This book was released on 2022-04-11 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Systematic Identification of Flavonoids written by Tom Mabry and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: About 1958, the late Professor R. E. ALSTON and Professor B. L. TURNER, both of the Department ofBotany, The University ofTexas at Austin, initiated a general systematic investigation ofthe legurne genus Baptisia. They found that flavonoid patterns, as revealed by two-dimensional paper chromatography, were valid criteria for the recognition of the Baptisia species and for the documentation of their numerous natural hybrids. Later, they showed that the flavonoid chemistry could be used for the analysis of gene flow among populations. At that time no attempt was made to even partially identify the flavonoids which were detected chromatographically. Neverthe1ess, it soon became apparent that the full value of the chemical data for systematic purposes required knowledge of the structures of the flavonoids. In 1962, one of us (T.J.M.) in collaboration with Drs. ALSTON and TURNER beg an the chemical analysis of the more than 60 flavonoids which had been chromatographi cally detected in the 16 Baptisia species. In the intervening years, a number of chemists and botanists, inc1uding Drs. K. BAETCKE, B. BREHM, M. CRANMER, D. HORNE, J. KAGAN, B. KROSCHEWSKY, J. MCCLURE, H. RÖSLER, and J. WALLACE, participated in the devel opment of techniques and procedures for the rapid identification of known flavonoids and in the structure determination of new flavonoids. In addition, the flavonoid chem istry of many plants other than Baptisia was investigated.
Download or read book Fungal Metabolites written by Jean-Michel Mérillon and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Bioactive Products in Sustainable Agriculture written by Joginder Singh and published by Springer Nature. This book was released on 2020-05-11 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses various aspects of bioactive natural products employed in the agrochemical and agriculture sectors. It covers the use of plants, microorganisms, and microbial metabolites as eco-friendly, cost-effective, and sustainable alternatives to chemicals in the field of agriculture. Written by active researchers and academics, the book highlights state-of-art products in the field, as well as the gaps, challenges, and obstacles associated with the use of plants, microbes and their products. Given its scope, it is a valuable resource for the scientific community and professionals in enterprises wanting insights into the latest developments and advances in the context of biological products, including their applications, traditional uses, modern practices, and strategies to harness their full potential.
Download or read book Studies in Natural Products Chemistry written by Atta-ur Rahman and published by Elsevier. This book was released on 2008-07-24 with total page 967 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents frontier reviews of recent developments in bioactive natural products in cutting-edge areas by eminent experts in their respective fields. It is an essential addition to this important series on Natural Products Chemistry, generally acknowledged to be the leading series on this topic. • The first seven reviews cover recent developments in the field of bioactive marine natural products.• Additional coverage includes Novel Domino reactions; medicinal plants and phytochemicals; recent developments in bioactive natural peptides; the chemistry and pharmacology of natural cyclic lipopeptides; and the biological activities of Salvia .• The text includes a comprehensive review of biologically active compounds of semi-metals such as boron, silicon, arsenic, selenium and tellurium.
