Download or read book Contribution l tude de l oxydation electrochimique de l acide nitreux et des ions nitrite written by Edmond Julien and published by . This book was released on 1968 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contribution l tude de l oxydation anodique du monoxyde d azote sur anode de platine written by Ting-Rui Wei and published by . This book was released on 1983 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail présente l'étude de l'oxydation électrolytique du monoxyde d'azote, sur anode de platine au cours de l'électrolyse d'une solution d'acide nitrique diluée dans un réacteur électrochimique. Le tracé de courbes intensité-potentiel dans le réacteur permet de mettre en évidence deux zones distinctes : une première zone située vers 1000 mV (ECS), où les ions nitrites provenant de l'oxydation chimique du monoxyde d'azote par l'acide nitrique dilué sont oxydés en ions nitratés. Une deuxième zone située vers 2000 mV (ECS), où l'oxydation du monoxyde d'azote s'effectue directement et simulanément au dégagement d'oxygène. Le système platine-acide nitrique favorise la réaction d'oxydation directe. Le paramètre important du réacteur électrochimique est la forme de l'électrode qui doit permettre d'assurer un bon contact ternaire. On étudie également l'influence des autres paramètres (distribution du gaz, vitesse spatiale, densité de courant, séparation des compartiments...)

Download or read book Contribution l tude de la r duction de l acide nitreux par les ions ferreux written by Alain Chalamet and published by . This book was released on 1974 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE LA REDUCTION DES NITRITES PAR LES IONS FERREUX, SOUS ATMOSPHERE INERTE, EN MILIEU ACIDE (PH 5). APPLICATION DES CONCLUSIONS TIREES DE CETTE ETUDE, A LA REDUCTION DES NITRITES DANS LES SOLS HYDROMORPHES

Download or read book Contribution l tude de la r action d oxydation du neptunium pentavalent par l acide nitrique catalys e par l acide nitreux written by Jean-Paul Moulin and published by . This book was released on 1975 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: CINETIQUE DE L'OXYDATION ETUDIEE PAR UNE METHODE UTILISANT DES SOLVANTS, SANS EXTRACTION LIQUIDE LIQUIDE: REACTION DU 1ER ORDRE PAR RAPPORT A HNO::(2) QUAND SA CONCENTRATION EST INFERIEURE A CELLE DE NP(V) ET DU 1ER ORDRE PAR RAPPORT A NP(V) DANS LE CAS INVERSE. INFLUENCE DE LA TEMPERATURE ET DES IONS H**(+) ET NO::(3)**(-): ILS ONT TOUS DEUX UN EFFET ACCELERATEUR

Download or read book R duction lectrochimique des ions nitrate et nitrite sur lectrode de cuivre en milieu neutre written by Nizar Aouina and published by . This book was released on 2009 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Au cours de ce travail, le mécanisme réactionnel de réduction des ions nitrate à une électrode de cuivre en milieu neutre a été étudié et comparé aux résultats obtenus en milieux acide et alcalin. Pour ce faire, des études avec un des intermédiaires réactionnels, les nitrites, ont également été menées. En présence d’ions nitrate, trois vagues de réduction apparaissent sur le voltampérogramme vers -0,9, -1,2 et -1,3 V/ECS. Des mesures avec une électrode tournante nous ont permis de déterminer le nombre d’électrons échangés pour chaque vague, à savoir 2 (nitrites), 6 (hydroxylamine) et 8 (ammoniaque). Ces résultats ont été confirmés par voltampérométrie cyclique. Des électrolyses prolongées ont été effectuées en présence d’ions nitrate, à trois potentiels. Les analyses par spectrométrie UV-vis ont permis de détecter la présence de nitrites, hydroxylamine et ammoniaque au sein du catholyte. L’analyse par DEMS de la phase aqueuse a mis en évidence la production de protoxyde d’azote N2O à -1,2 V/ECS. Par ailleurs, une étude a été menée afin expliquer le blocage progressif de l’électrode de cuivre observé lors de la réduction des ions nitrate dans une cellule électrochimique à un seul compartiment. Ce blocage pourrait provenir du masquage des sites d’adsorption des ions nitrate par NO, ce dernier étant produit à la contre électrode suite à l’oxydation de l’ammoniaque par les radicaux hydroxyle. Enfin, la présence systématique d’une branche inductive sur les spectres d’impédance électrochimique (SIE) relevés lors de la réduction des ions nitrate constitue la signature d’un intermédiaire adsorbé impliqué dans le processus réactionnel. Finalement, l’étude SIE sur électrode tournante nous a permis de déterminer le coefficient de diffusion des ions nitrate à 25°C, valeur sur laquelle existait une certaine confusion dans la littérature. Cette valeur a conduit à une détermination précise du nombre d’électrons échangés lors de la réduction des ions nitrate.

Download or read book Nuclear Corrosion Science and Engineering written by Damien Feron and published by Elsevier. This book was released on 2012-02-21 with total page 1073 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of nuclear materials, i.e. the interaction between these materials and their environments, is a major issue for plant safety as well as for operation and economic competitiveness. Understanding these corrosion mechanisms, the systems and materials they affect, and the methods to accurately measure their incidence is of critical importance to the nuclear industry. Combining assessment techniques and analytical models into this understanding allows operators to predict the service life of corrosion-affected nuclear plant materials, and to apply the most appropriate maintenance and mitigation options to ensure safe long term operation.This book critically reviews the fundamental corrosion mechanisms that affect nuclear power plants and facilities. Initial sections introduce the complex field of nuclear corrosion science, with detailed chapters on the different types of both aqueous and non aqueous corrosion mechanisms and the nuclear materials susceptible to attack from them. This is complemented by reviews of monitoring and control methodologies, as well as modelling and lifetime prediction approaches. Given that corrosion is an applied science, the final sections review corrosion issues across the range of current and next-generation nuclear reactors, and across such nuclear applications as fuel reprocessing facilities, radioactive waste storage and geological disposal systems.With its distinguished editor and international team of expert contributors, Nuclear corrosion science and engineering is an invaluable reference for nuclear metallurgists, materials scientists and engineers, as well as nuclear facility operators, regulators and consultants, and researchers and academics in this field. - Comprehensively reviews the fundamental corrosion mechanisms that affect nuclear power plants and facilities - Chapters assess different types of both aqueous and non aqueous corrosion mechanisms and the nuclear materials susceptible to attack from them - Considers monitoring and control methodologies, as well as modelling and lifetime prediction approaches

Download or read book Analytical Methods in the Nuclear Fuel Cycle written by and published by . This book was released on 1972 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Chemistry and Biology of Nitroxyl HNO written by Fabio Doctorovich and published by Elsevier. This book was released on 2016-09-01 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chemistry and Biology of Nitroxyl (HNO) provides first-of-its-kind coverage of the intriguing biologically active molecule called nitroxyl, or azanone per IUPAC nomenclature, which has been traditionally elusive due to its intrinsically high reactivity. This useful resource provides the scientific basis to understand the chemistry, biology, and technical aspects needed to deal with HNO. Building on two decades of nitric oxide and nitroxyl research, the editors and authors have created an indispensable guide for investigators across a wide variety of areas of chemistry (inorganic, organic, organometallic, biochemistry, physical, and analytical); biology (molecular, cellular, physiological, and enzymology); pharmacy; and medicine. This book begins by exploring the unique molecule's structure and reactivity, including important reactions with small molecules, thiols, porphyrins, and key proteins, before discussing chemical and biological sources of nitroxyl. Advanced chapters discuss methods for both trapping and detecting nitroxyl by spectroscopy, electrochemistry, and fluorescent inorganic cellular probing. Expanding on the compound's foundational chemistry, this book then explores its molecular physiology to offer insight into its biological implications, pharmacological effects, and practical issues. - Presents the first book on HNO (nitroxyl or azanone), an increasingly important molecule in biochemistry and pharmaceutical research - Provides a valuable coverage of HNO's chemical structure and significant reactions, including practical guidance on working with this highly reactive molecule - Contains high quality content from recognized experts in both industry and academia

Download or read book NOx Related Chemistry written by and published by Academic Press. This book was released on 2015-01-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOx Related Chemistry is a volume of a series that presents timely and informative summaries of the current progress in a variety of subject areas within inorganic chemistry, ranging from bio-inorganic to solid state studies. This acclaimed serial features reviews written by experts in the field and serves as an indispensable reference to advanced researchers. Each volume contains an index, and each chapter is fully referenced.

Download or read book Translational Advances in Gynecologic Cancers written by Michael Birrer and published by Academic Press. This book was released on 2017-01-25 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translational Advances in Gynecologic Cancers straddles the bench and bed divide by highlighting important and interesting research that is translatable to the clinic. The contents of this book cover the entire spectrum, from promising laboratory based research, to clinical trial efforts. Further, new therapeutic indications based upon randomized phase III trials are also included. Clinicians will learn about lab-based science that is about to enter the clinic, along with the rationale behind translational endpoints in trials. Researchers will be able to identify and understand the clinical needs of patients with these types of tumors to improve their research focus. - Provides a comprehensive description of all evolving translational gynecologic cancer research for clinicians - Identifies knowledge gaps to inform the next research direction - Ties together clinical research and patient needs to help both the researcher and clinician - Addresses genomics, new target therapies, novel tools, and more for ovarian, endometrial, and cervical cancer

Download or read book Whole Body Counters written by John H. Woodburn and published by . This book was released on 1964 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Clinical Chronopharmacology written by Alain Reinberg and published by CRC Press. This book was released on 1990-07 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodical and predictable changes in biological susceptibility and response to a large variety of chemical agents, including drugs and food, have been documented since the early 1970s. This book provides a survey of clinically-documented research in chronopharmacology.

Download or read book Fundamentals of Electrochemical Corrosion written by Ele Eugene Stansbury and published by ASM International. This book was released on 2000-01-01 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the essential aspects of the corrosion behavior of metals in aqueous environments, this book is designed with the flexibility needed for use in courses for upper-level undergraduate and graduate students, for concentrated courses in industry, for individual study, and as a reference book.

Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Download or read book Selected Measurement Methods for Plutonium and Uranium in the Nuclear Fuel Cycle written by Clement James Rodden and published by . This book was released on 1972 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Rhythm Research written by A. Sollberger and published by . This book was released on 1965 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: