Download or read book Analysis of Melanins written by Gerd Odh Olsson and published by . This book was released on 1998 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Melanins and Melanogenesis written by Giuseppe Prota and published by Academic Press. This book was released on 2012-12-02 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers all aspects of melanin pigmentation, providing a concise, comprehensive picture of new knowledge gained at the frontiers of research. It draws heavily on the author's 30-year activity in the field and his continuing work with specialists of widely diverse disciplines. The core of the volume deals with the structure, physicochemical properties, and biosynthesis of the major classes of melanin pigments, including neuromelanins. Further discussions include the biology of the various types of pigment-producing cells, the structure and mode of action of tyrosinase, and the chemistry of urinary melanogens and their biomedical applications as metabolic markers of melanocyte activity, especially for the follow-up of malignant melanoma. Finally, the volume considers progress in the photobiology and photochemistry of melanins, with special emphasis on the controversial role of these pigments in skin photoprotection. Melanins and Melanogenesis is ideally suited as a basic guide for newcomers, and a handy source of specific information for practitioners in academic, medical, and industrial settings.
Download or read book Quantitative Analysis of Skin Color from Melanin Content of Superficial Skin Cells written by H. Goldschmidt and published by . This book was released on 1972 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The color of human skin is determined by many factors. Blood supply, epidermal thickness, and pigments, both intrinsic and extrinsic, are responsible for the many variations we see. An important factor is the amount of the intrinsic pigment melanin, which absorbs and scatters ultraviolet radiation. In recent studies of the morphology of surface skin cells and their melanin content, we noticed a clear correlation between gross skin color and the average number of melanin granules per cell. This suggested that a quantitative analysis of melanin granules in skin cells from microscopic skin specimens, such as those present on clothing, could help to determine the skin color of the individual from which the cells came. This paper describes the methods of cell collection and staining followed and summarizes the results of the quantitative studies.
Download or read book 5th International Conference on Nanotechnologies and Biomedical Engineering written by Ion Tiginyanu and published by Springer. This book was released on 2021-12-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of the 5th International Conference on Nanotechnologies and Biomedical Engineering, held online on November 3–5, 2021, from Chisinau, Republic of Moldova. It covers fundamental and applied research at the interface between nanotechnologies and biomedical engineering. Chapters report on cutting-edge bio-micro/nanotechnologies, devices for biomedical applications, and advances in bio-imaging and biomedical signal processing, innovative nano-biomaterials as well as advances in e-health, medical robotics, and related topics. With a good balance of theory and practice, the book offers a timely snapshot of multidisciplinary research at the interface between physics, chemistry, biomedicine, materials science, and engineering.
Download or read book Pigments Pigment Cells and Pigment Patterns written by Hisashi Hashimoto and published by Springer Nature. This book was released on 2021-07-05 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively summarizes the biological mechanisms of coloration and pattern formation of animals at molecular and cellular level, offering up-to-date knowledge derived from remarkable progress in the last 10 years. The brilliant coloration, conspicuous patterns and spectacular color changes displayed by some vertebrates and invertebrates are generally their strategies of the utmost importance for survival. Consists of mainly three parts, starts with introductory chapter, such as Pigments and Pigment Organelles, Developmental Genetics of Pigment Cell Formation, Adult Pigment Patterns, and Color Changes, this book introduces new pigment compounds in addition to classically known pigments and organelles, explains how the generation of multiple types of pigment cell is genetically controlled, describes the mechanisms underlying the zebrafish stripe formation as well as other animals and also summarizes the mechanism of physiological and morphological color changes of teleost, amphibian and cephalopod. Written by experts in the field, this book will be essential reading for graduate students and researchers in biological fields who are interested in pigmentation mechanisms of animals.
Download or read book The Melanin Millennium written by Ronald E. Hall and published by Springer Science & Business Media. This book was released on 2012-09-14 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the aftermath of the 60s “Black is Beautiful” movement and publication of The Color Complex almost thirty years later the issue of skin color has mushroomed onto the world stage of social science. Such visibility has inspired publication of the Melanin Millennium for insuring that the discourse on skin color meet the highest standards of accuracy and objective investigation. This volume addresses the issue of skin color in a worldwide context. A virtual visit to countries that have witnessed a huge rise in the use of skin whitening products and facial feature surgeries aiming for a more Caucasian-like appearance will be taken into account. The book also addresses the question of whether using the laws has helped to redress injustices of skin color discrimination, or only further promoted recognition of its divisiveness among people of color and Whites. The Melanin Millennium has to do with now and the future. In the 20th century science including eugenics was given to and dominated by discussions of race category. Heretofore there remain social scientists and other relative to the issue of skin color loyal to race discourse. However in their interpretation and analysis of social phenomena the world has moved on. Thus while race dominated the 20th century the 21st century will emerge as a global community dominated by skin color and making it the melanin millennium.
Download or read book The Fungal Spore and Disease Initiation in Plants and Animals written by G.T. Cole and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This treatise is focused on early aspects of fungal pathogenesis in plant and animal hosts. Our aim in choosing the topics and contributors was to demonstrate common approaches to studies of fungal-plant and fungal-animal interactions, particularly at the biochemical and molecular Ievels. For example, the initial events of adh«sion of fungal spores to the exposed surface tissues of the host are essential for subsequent invasion of the plant or animal and establishment of pathogenesis. A point of consensus among investigators who have directed their attention to such events in plants, insects, and vertebrates isthat spore adhesion to the host cuticle or epithelium is more than a simple binding event. lt is a complex and potentially pivotal process in fungal-plant interactions which "may involve the secretion of ftuids that prepare the infection court for the development of morphological stages of the germling" and subsequent invasion of the host (Nicholson and Epstein, Chapter 1). The attachment of the fungal propagule to the arthropod cuticle is also "mediated by the chemical components present on the outer layer of the spore wall and the epicuticle . . . . Initial attachment may be reinforced further by either the active secretion of adhesive materials or the modification of spore wall materiallocated at the [fungal spore arthropod] cuticle interface (Boucias and Pendland, Chapter 5).
Download or read book Melanin written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Melanins Functions Biotechnological Production and Applications written by Guillermo Gosset and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date overview of the biological functions of melanins, their biotechnological production, and their industrial applications. The melanins form a group of polymeric pigments found in most organisms. These natural products are generated by the oxidation of phenolic and indolic molecules yielding melanins, which include eumelanin, pheomelanin, pyomelanin, and the allomelanins. These pigments have diverse biological functions, including photoprotection, thermoregulation, antioxidation, virulence, and metal ion sequestration. Melanins have physicochemical properties that have proven useful in the optical, electronic, material, agriculture, cosmetic, pharmaceutical, and medical industries. The chapters in this book provide an in-depth analysis of the current issues and challenges in this field. Topics covered include the properties, biogenesis, and evolution of melanosomes. The book also addresses the synthesis and industrial production of melanins by microorganisms. The metabolic pathways for the synthesis of several types of polymeric pigments in microorganisms and their role in pathogenesis are reviewed. The large-scale production and purification of melanins to provide this product for industrial applications is a formidable challenge. Two chapters present and discuss the state-of-the-art used for the generation of microbial melanin-production strains and the processes for the biotechnological synthesis and purification of these pigments. Melanins are polymers that can interact with metals, a chapter reviews this capacity in the context of technological applications, including electrochemical energy storage and metal recovery. These polymers are materials having favorable characteristics for photonic applications, including UV blocking and broadband absorption. The current advances in the application of these pigments in optically active materials are presented and discussed.
Download or read book The Location and Analysis of Melanins in the Cell Walls of Some Soil Fungi written by and published by . This book was released on 1974 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods in Actinobacteriology written by Dhanasekaran Dharumadurai and published by . This book was released on 2022 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume details techniques on the study of Isolation, characterization, and exploration of actinobacteria in industrial, food, agricultural, and environmental microbiology. Chapters cover a wide range of basic and advanced techniques associated with research on isolation, characterization and identification of actinobacteria in soil, sediment, estuarine, water, Saltpan, Mangroves, plants, lichens, sea weeds, sea grass, animals-crab, snail, shrimp. Authoritative and cutting-edge, Methods in Actinobacteriology aims to be a useful practical guide to researches to help further their study in this field.
Download or read book Melanin written by Miroslav Blumenberg and published by BoD – Books on Demand. This book was released on 2017-03-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The word melanin refers to dark natural pigments produced by the oxidative degradation of tyrosine, catalyzed by tyrosinase, and polymerized into insoluble granular substance. The main function of melanin is to protect from harmful agents, primarily UV radiation, but also from oxidation, heavy metals, etc. In this volume, chapters deal with production of melanin in human oral mucosa (Liviu et al.), the regulation of melanin action (Cecile et al.), production and potential technological application of fungal melanins (Pombiero-Sponchiado et al.) and an innovative method for measuring melanin in various samples (Zdybel et al.). In conclusion, this volume presents various biological and industrial aspects of melanin production, uses and analysis.
Download or read book Image and Signal Processing written by Alamin Mansouri and published by Springer. This book was released on 2018-06-29 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 8th International Conference on Image and Signal Processing, ICISP 2018, held in Cherbourg, France, in July 2018. The 58 revised full papers were carefully reviewed and selected from 122 submissions. The contributions report on the latest developments in image and signal processing, video processing, computer vision, multimedia and computer graphics, and mathematical imaging and vision.
Download or read book In the Light of Evolution written by National Academy of Sciences and published by . This book was released on 2007 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arthur M. Sackler Colloquia of the National Academy of Sciences address scientific topics of broad and current interest, cutting across the boundaries of traditional disciplines. Each year, four or five such colloquia are scheduled, typically two days in length and international in scope. Colloquia are organized by a member of the Academy, often with the assistance of an organizing committee, and feature presentations by leading scientists in the field and discussions with a hundred or more researchers with an interest in the topic. Colloquia presentations are recorded and posted on the National Academy of Sciences Sackler colloquia website and published on CD-ROM. These Colloquia are made possible by a generous gift from Mrs. Jill Sackler, in memory of her husband, Arthur M. Sackler.
Download or read book EMBEC NBC 2017 written by Hannu Eskola and published by Springer. This book was released on 2017-06-12 with total page 1139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the proceedings of the joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering and Medical Physics (NBC), held in Tampere, Finland, in June 2017. The proceedings present all traditional biomedical engineering areas, but also highlight new emerging fields, such as tissue engineering, bioinformatics, biosensing, neurotechnology, additive manufacturing technologies for medicine and biology, and bioimaging, to name a few. Moreover, it emphasizes the role of education, translational research, and commercialization.
Download or read book Application of Electron Paramagnetic Resonance Spectroscopy to Examine Free Radicals in Melanin Polymers and the Human Melanoma Malignum Cells written by Barbara Pilawa and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies of free radicals in melanin and the human melanoma malignum cells by an X-band (9.3 GHz) electron paramagnetic resonance (EPR) spectroscopy were presented. The original results were compared with those published earlier. The aim of this work was application of the advanced spectral analysis to determine free radical properties in melanin biopolymers obtained from different melanotic tumor cells and free radicals existing in the human melanoma cells. Magnetic spin-lattice interactions in melanin samples were tested. The evolution of lineshape of tumor cells with increasing of microwave power was determined to confirm their complex free radical system. The useful shape parameters were proposed. The shape of melanotic tumor cells was analyzed. EPR spectra of free radicals in the melanin isolated from different tumor cells measured in the wide range of microwave power were analyzed. The melanins were obtained from the control tumor cells and the cells cultured with the several antitumor substances. The usefulness of the electron paramagnetic resonance spectroscopy was confirmed.
