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Author: Jean-Luc Guisset
Publisher: Springer Science & Business Media
ISBN: 3642799035
Category : Medical
Languages : en
Pages : 235
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Book Description
Rambling of an elderly biochemist Most biochemists of my generation, who were trying to discover the pathways of metabolism, simply ignored membranes; or regarded them as a nuisance. Think of the difficulties experienced in studies on cytochromoxidase which one could not separate from « insoluble material )} or again of the desperate efforts during a quarter of a century to unravel oxidative phosphorylation without paying much attention to lipidic membranes, altough the system was known to be associated with them. Hence the amazement and the general skepticism that met at first Mitchell's theory, which was giving membranes the central function they deserve in oxidative phosphorylation and photosynthesis. This, I believe, was a turning point; enzymologists thereafter became aware of the importance of the membranes. Neurophysiologists, of course, had long been interested in the outer cell membrane with its electrical properties and the ion potentials. Histologists and electronmicroscopists also, who observed inside the cell.organelles of which membranes are essential components: nucleus, nucleoli, mitchondria, lysosomes,Golgi apparatus, endoplasmic reticulum, chloroplasts. For them at least, a cell did not look like a mere bag full of enzymes and small molecules; they knew, they could see that it is a highly structured system divided into many compartments by membranous formations.
Author: Jean-Luc Guisset
Publisher: Springer Science & Business Media
ISBN: 3642799035
Category : Medical
Languages : en
Pages : 235
Get Book Here
Book Description
Rambling of an elderly biochemist Most biochemists of my generation, who were trying to discover the pathways of metabolism, simply ignored membranes; or regarded them as a nuisance. Think of the difficulties experienced in studies on cytochromoxidase which one could not separate from « insoluble material )} or again of the desperate efforts during a quarter of a century to unravel oxidative phosphorylation without paying much attention to lipidic membranes, altough the system was known to be associated with them. Hence the amazement and the general skepticism that met at first Mitchell's theory, which was giving membranes the central function they deserve in oxidative phosphorylation and photosynthesis. This, I believe, was a turning point; enzymologists thereafter became aware of the importance of the membranes. Neurophysiologists, of course, had long been interested in the outer cell membrane with its electrical properties and the ion potentials. Histologists and electronmicroscopists also, who observed inside the cell.organelles of which membranes are essential components: nucleus, nucleoli, mitchondria, lysosomes,Golgi apparatus, endoplasmic reticulum, chloroplasts. For them at least, a cell did not look like a mere bag full of enzymes and small molecules; they knew, they could see that it is a highly structured system divided into many compartments by membranous formations.
Author: Thérèse Vanden Driessche
Publisher: Springer Science & Business Media
ISBN: 9401595569
Category : Science
Languages : en
Pages : 285
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Book Description
Although the term redox covers an important number of chemical reactions, biochemists are more familiar with reactions involving the reactions mediated by electron transfer chains associated with respiration, the thiol-disulfide exchanges and the reactions occurring in the presence of free radicals. More recently, the importance of these reactions in the living world and in medicine has been recognized by biochemists, biologists, physiologists, physicians, etc. The importance of the subject in both fundamental and is reflected by the abundance of interesting reviews applied science concerning the subject (Cadenas, 1989, Del Maestro, 1991) and books (Dreosti, 1991; Rice-Evans and Burdon, 1994; Armstrong, 1994) The aim of this chapter is to describe basic reactions known with references to reviews covering special subjects related to redox reactions. Transformation of energy in living organisms is mediated by complex biological systems such as electron transfer chains where the succession of redox reactions provides energy to the organisms. Molecular oxygen or dioxygen is an essential molecule and is the terminal acceptor of electrons during respiration in eukaryotes. In these organisms, the electron transfer chain is located in the mitochondrial membranes and produces adenosine triphosphate (ATP). In anaerobes, the electron acceptor is C0 , S, sulphate or nitrate ions 2 instead of 02.
Author: David L. Spector
Publisher: Academic Press
ISBN: 0323138136
Category : Science
Languages : en
Pages : 560
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Book Description
The book begins with a general introduction and a taxonomic description of the dinoflagellates both to acquaint those unfamiliar with this group of organisms and to set the tone for the rest of the volume. It then addresses the following topics: cell biology (cell cortex, nuclear structure, cell cycle and mitosis, sexual reproduction, cysts and unusual inclusions); biochemistry (physiology and biochemistry, blooms and toxins, and biorhythms); and genetics. In addition, a comprehensive chapter on cell culturing provides the reader with an understanding of the growth conditions and requirements of various dinoflagellates and a simple to follow listing of culture media, all expressed in similar units for ease of comparison. The volume closes with a chapter on evolution which evaluates many of the features of dinoflagellates discussed in the text in terms of evolutionary significance.We hope that this treatise will be of use to research workers and students in the area of dinoflagellate biology and in other areas of biology in which dinoflagellates may be used as a model system for studying various biological problems.
Author: John Woodland Hastings
Publisher: Abakon-Verlagsgesellschaft
ISBN:
Category : Science
Languages : en
Pages : 470
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Book Description
Author: Kendric C. Smith
Publisher: Springer Science & Business Media
ISBN: 1468436414
Category : Science
Languages : en
Pages : 320
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Book Description
The goals of the science of photobiology can be divided into four categories: to develop (I) ways to optimize the beneficial effects of light on man and his environment, (2) methods to protect organisms, including man, from the detrimental effects of light, (3) photochemical tools for use in studies of life processes, and (4) photochemical therapies in medicine. To achieve these goals will require the knowledgeable collaboration of biologists, chemists, engineers, mathematicians, physicians, and physicists; because photobiology is a truly multidisciplinary science. While a multidis ciplinary science is more intellectually demanding, it also has a greater potential for unexpected breakthroughs that can occur when data from several areas of science are integrated into new concepts for theoretical or practical use. Photochemical and Photobiological Reviews continues to provide in depth coverage of the many specialty areas of photobiology. It is hoped that these reviews will provide an important service to the younger scientists in the field and to senior scientists in related fields, because they provide a ready access to the recent literature in the field, and more importantly, they frequently offer a critical evaluation of the direction that the field is taking, or suggest a redirection when appropriate. Since it is important that this review series remain responsive to the needs of photochemists and photobiologists, the Editor would value com ments and suggestions from its readers.
Author: Beatrice M. Sweeney
Publisher: Academic Press
ISBN: 1483259153
Category : Science
Languages : en
Pages : 187
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Book Description
Rhythmic Phenomena in Plants, Second Edition focuses on the study of biological clocks in all kinds of plants, from unicellular algae to flowering trees. This book discusses the patterns of plant movement, parameters of rhythms and how to calculate them, and rhythms that match and do not match environmental periodicities. The mechanism of circadian timing, circadian rhythms in angiosperms, comparison between dinoflagellates and other rhythmic organisms, and semilunar and lunar rhythms are also elaborated. This publication likewise covers the measurement of day length in photoperiodism, circannian rhythms in plants, oscillations with short periods in leaves and roots, and streaming in a slime mold. This edition is valuable to biologists intending to contribute to the study of biological timing.
Author: Joseph S. Takahashi
Publisher: Springer Science & Business Media
ISBN: 1461512018
Category : Medical
Languages : en
Pages : 776
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Book Description
The Handbook of Behavioral Neurobiology series deals with the aspects of neurosciences that have the most direct and immediate bearing on behavior. It presents the most current research available in the specific areas of sensory modalities. This volume explores circadian rhythms.
Author: Richard V. Lynch
Publisher:
ISBN:
Category : Bibliography
Languages : en
Pages : 210
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Book Description
Publications relevant to marine bioluminescence from 1979 through 1987 are annotated and cross-indexed by author, organism studied, geographic location, and key words. Sources of research funding are discussed, and the most prolific institutions and most popular sources for publication are identified. Six areas of particular interest--namely flash characteristics, stimulation techniques, geographic and temporal distribution and occurrence and correlation with environmental parameters, the luminous organism themselves, symbiosis, and circadian rhythms are identified and analyzed for significant progress, important research omissions, and trends. No significant trends are identified, although the suggestion of the possibility of a decrease in research effort in these areas over the decade is noted. The international nature of the research is considered ... Bioluminescence, Marine biology, Optical properties.
Author: K. C. Smith
Publisher: Springer Science & Business Media
ISBN: 1468417134
Category : Science
Languages : en
Pages : 431
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Book Description
Although there are several excellent books covering a few of the specialized areas of photobiology, at the present time there is no book that covers all areas of the science of photobiology. This book attempts to fill this void. The science of photobiology is currently divided into 14 subspecialty areas by the American Society for Photobiology. The first 14 chapters of this book deal with those subspecialty areas, each written by a leader in the field. Chapter 15, entitled "New Topics in Photobiology," highlights areas of research that may be desig nated sUbspecialties of photobiology in the future. This book has been written as a textbook to introduce the science of photobiology to advanced undergraduate and graduate students. The chapters are written to provide a broad overview of each topic. They are designed to contain the amount of information that might be presented in a one-to two-hour general lecture. The references are not meant to be exhaustive, but key refer ences are included to give students an entry into the literature. Frequently a more recent reference that reviews the literature will be cited rather than the first paper by the author making the original discovery. Whenever practical, a classroom demonstration or simple laboratory exercise has been provided to exemplify one or more major points in a chapter.
Author: Peter H. Redfern
Publisher: Springer Science & Business Media
ISBN: 3662093553
Category : Medical
Languages : en
Pages : 682
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Book Description
Measured by any criteria, research in chronobiology in general and chronopharmacology in particular has expanded rapidly in recent years. This expansion has been paralleled by an increasing recognition by those outside the field of the relevance and significance of recent developments in chronobiology. Advances in two areas have been chiefly responsible. First, application of the full range of modern techniques in behavioral, neurochemical, and molecular biology have greatly improved our understanding of basic clock mechanisms. In several species the genetic basis of the circadian clock is being progressively delineated. A complete picture of the neurochemical and neuroanatomical structure of the mammalian clock is emerging and the complex pattern of control mechanisms involving endogenous clock mechan isms and photic and nonphotic zeitgebers is being built up as a result of behavioral studies. Secondly, in parallel with these exciting developments in basic science, clinical applications are being convincingly demonstrated in the general fields of pharmacology and medicine as well as in specific areas, e.g., jet lag, shiftwork maladaption syndrome, blindness, and cardiovascular system. It is therefore an opportune time to review progress in the field of chronopharmacology and to introduce some of the exciting developments and prospects to a readership beyond the confines of the chronobiological cognoscenti. This volume is therefore aimed primarily at the pharmacologist - whether basic, applied, or clinical-who is not a specialist in chronobiology.
