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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.
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.
An Ancient Cellular Mechanism in the Tension Field between Energy Requirements and Destruction Avoidance.- Overview.- The Biochemistry Of Redox Reactions.- Light-Dark and Thioredoxin-Mediated Metabolic Redox Control in Plant Cells.- Redox Cycling of Intracellular Thiols: State Variables for Ultradian, Cell Division Cycle and Circadian Cycles?.- Occurrence and comparative physiology of melatonin in evolutionary diverse organisms.- Circadian Rhythms and Oxidative Stress in Non-vertebrate Organisms.- Circadian Aspects of the Cellular Redox State: Melatonin Actions and Implications for Oncogenesis.- Plasma membrane electron transport and the control of cellular redox status and circadian rhythms.- Fluctuation of Reactive Oxygen Species Released by Inflammatory Cells*.- Circadian variations in toxic liver injury and the hepatic P-450 monooxygenase system.- Apoptotic Signals: Possible Implication Of Circadian Rhythms.- Redox capacities of in vitro cultured plant tissues: the case of hyperhydricity..- Redox state and phosphorylation potential as macroparameters in rhythmic control of metabolism — a molecular basis for seasonal adaptation of development.
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`In summary, this is an excellent volume that I recommend without
reservation to the biologist in all disciplines. It s rare to find
a text of this nature that makes truly enjoyable reading. Not only
is this volume packed with useful information, but it also conveys
much of the enthusiasm and motivation of the authors in the pursuit
of the advancement of science. As such it makes compelling reading
in this volume would be an asset to any scientific library.'
Annals of Botany 89:4 (2002)
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