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General chemistry, physical chemistry, Chimie générale, chimie physique, Metallurgy, welding, Métallurgie, soudage, Atomic molecular physics, Physique atomique et moléculaire, Sciences exactes et technologie, Exact sciences and technology, Terre, ocean, espace, Earth, ocean, space, Sciences de la terre, Earth sciences, Minéralogie, Mineralogy, Silicates, Africa, Central Africa, Afrique Equatoriale, Afrique, Africa ecuatorial, Cinétique, Kinetics, Cinética, Kaolinite, Caolinita, Réaction chimique, Chemical reactions, Chemical reaction, Reacción química, Zaïre, Zaire, and Hydroxyle

General chemistry, physical chemistry, Chimie générale, chimie physique, Metallurgy, welding, Métallurgie, soudage, Atomic molecular physics, Physique atomique et moléculaire, Sciences exactes et technologie, Exact sciences and technology, Terre, ocean, espace, Earth, ocean, space, Sciences de la terre, Earth sciences, Minéralogie, Mineralogy, Silicates, Africa, Central Africa, Afrique Equatoriale, Afrique, Africa ecuatorial, Kaolinite, Caolinita, Phyllosilicate, Sheet silicates, Filosilicato, Spectrométrie IR, Infrared spectroscopy, Infrared spectrometry, Espectrometría IR, Zaïre, and Zaire

Biochemistry, molecular biology, biophysics, Biochimie, biologie moléculaire, biophysique, General chemistry, physical chemistry, Chimie générale, chimie physique, Chemistry, Chimie, Atomic molecular physics, Physique atomique et moléculaire, Sciences exactes et technologie, Exact sciences and technology, Terre, ocean, espace, Earth, ocean, space, Sciences de la terre, Earth sciences, Minéralogie, Mineralogy, Silicates, Africa, North Africa, Afrique du Nord, Afrique, Africa del norte, Argile minéral, Clay minerals, Arcilla mineral, Maroc, Morocco, Marruecos, Propriété physique, Physical properties, Propiedad física, and Gel argileux

General chemistry, physical chemistry, Chimie générale, chimie physique, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Etat condense: structure, proprietes mecaniques et thermiques, Condensed matter: structure, mechanical and thermal properties, Equations d'état, équilibres de phases et transformations de phases, Equations of state, phase equilibria, and phase transitions, Etudes générales des transformations de phases, General studies of phase transitions, Etude théorique, Theoretical study, Estudio teórico, Modèle Ising, Ising model, Modelo Ising, Modèle réticulaire, Lattice model, Modelo reticular, Phénomène critique, Critical phenomenon, Fenómeno crítico, Système binaire, Binary system, Sistema binario, Transformation phase, Phase transformation, and Transformación fase

En passant des variables de spin, prenant trois valeurs, aux nombres d'occupation, on montre que le modèle d'Ising avec un spin S=1 est équivalent au modèle réticulaire d'une solution binaire. Cette équivalence permet d'obtenir une série de rapports pour les paramètres critiques. Pour un cas simple de mélange de composants symétriques, on étudie l'approximation du champ autocohérent pour le modèle élaboré.

General chemistry, physical chemistry, Chimie générale, chimie physique, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines interdisciplinaires: science des materiaux; rheologie, Cross-disciplinary physics: materials science; rheology, Science des matériaux, Materials science, Matériaux particuliers, Specific materials, Métaux, semimétaux et alliages, Metals, semimetals and alloys, Sciences appliquees, Applied sciences, Metaux. Metallurgie, Metals. Metallurgy, Corrosion, Action des agents de corrosion, Corrosion environments, Corrosion sel, Salt corrosion, Salzkorrosion, Perchlorate, Perchlorates, Perchlorat, Potentiel électrochimique, Electrochemical potential, and Elektrochemisches Potential

Différentes mesures d'impédance montrent que le potentiel de charge zéro n'est pas possible dans les solutions aqueuses de perchlorate.

General chemistry, physical chemistry, Chimie générale, chimie physique, Metallurgy, welding, Métallurgie, soudage, Sciences exactes et technologie, Exact sciences and technology, Chimie, Chemistry, Chimie generale et chimie physique, General and physical chemistry, Electrochimie, Electrochemistry, Electrochimie à haute température (incluant les sels fondus), High temperature electrochemistry (including molten salts), Aluminium III Bromure, Aluminium III Bromides, Brome, Bromine, Carbone, Carbon, Cinétique, Kinetics, Dégagement gazeux, Gas release, Dégagement électrolytique, Electrolytic evolution, Electrode, Electrodes, Electrolyte fondu, Molten electrolyte, Etat vitreux, Glassy state, Eutectique, Eutectic, Halogène, Halogen, Impulsion, Impulse, Ionisation, Ionization, Mécanisme EC, EC mechanism, Mélange, Mixture, Méthode galvanostatique, Galvanostatic method, Phase fondue, Molten phase, Potassium Bromure, and Potassium Bromides

Etudes à l'aide des méthodes galvanostatiques à une ou 2 impulsions de la cinétique d'ionisation-dégagement du brome sur un support de carbone vitreux dans le mélange fondu d'AlBr3-KBr (25,8 mol%), entre 378 et 448 K. On montre que le dégagement anodique du brome est contrôlé par la réaction de transfert de charge et par une réaction chimique hétérogène.

General chemistry, physical chemistry, Chimie générale, chimie physique, Metallurgy, welding, Métallurgie, soudage, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Metaux. Metallurgie, Metals. Metallurgy, Transformation de matériaux métalliques, Production techniques, Traitements de surface, Surface treatment, Dépôt de métaux et d'alliages, Metallic coatings, Cinétique, Kinetics, Cinetica, Kinetik, Cuivrage, Copper coating, Encobrado, Verkupfern, Dépôt électrolytique, Electroplating, Depósito electrolítico, Elektroplattieren, Electrolyte, Electrolito, Elektrolyt, Impédance électrique, Electrical impedance, Impedancia electrica, Sulfate, Sulfates, Sulfato, and Sulfat

Obtention et analyse de la relation mentionnée, valable à l'équilibre et en cas d'application d'un courant continu. Forme caractéristique de l'hodographe d'impédance et des circuits électriques équivalents correspondants. Procédés de détermination des paramètres cinétiques.

General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, Énergie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Hydrogen production in 1990-1995 from coal based process using HTGR reactor as a heat source: Expected process efficiency of 60-70%. Demand for hydrogen expected to increase by a factor of 10 by 2000 especially in synthetic fuel. Data on overall efficiency of process.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, and Énergie

Hydrogen production in 1990-1995 from coal based process using HTGR reactor as a heat source: Expected process efficiency of 60-70%. Demand for hydrogen expected to increase by a factor of 10 by 2000 especially in synthetic fuel. Data on overall efficiency of process.

General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, Énergie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Use of off-peak electrical power as an energy source for the electrolytic production of hydrogen: Analysis of components required and of the operation of the system including production, transmission, storage and market. Development of energy storage and flattening of the load curve very important to lower capital cost.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, and Énergie

Use of off-peak electrical power as an energy source for the electrolytic production of hydrogen: Analysis of components required and of the operation of the system including production, transmission, storage and market. Development of energy storage and flattening of the load curve very important to lower capital cost.

General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, Énergie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Production of synthetic fuel and feedstock from atmospheric and aquatic carbon dioxide and water using nuclear power in the United States 1974-1985: Nuclear power cost and comparison with conventional power plant for electricity generation. Costs assessment for the production of methane, methanol, and gasoline. Production of by-product oxygen in the methanol plant.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, and Énergie

Production of synthetic fuel and feedstock from atmospheric and aquatic carbon dioxide and water using nuclear power in the United States 1974-1985: Nuclear power cost and comparison with conventional power plant for electricity generation. Costs assessment for the production of methane, methanol, and gasoline. Production of by-product oxygen in the methanol plant.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, and Énergie

Assessment of the potential of Greenland for hydropower also producing electrolytic hydrogen: Summary of geographical data of Greenland. Assessment of proven, reasonably assured and ultimately recoverable potential. Means of exploitation. Energy cost considerations for six favourable site. The exploitation of Greenland for hydro-electricity and for hydrogen production appeared to be commercially attractive.

General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, Énergie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Assessment of the potential of Greenland for hydropower also producing electrolytic hydrogen: Summary of geographical data of Greenland. Assessment of proven, reasonably assured and ultimately recoverable potential. Means of exploitation. Energy cost considerations for six favourable site. The exploitation of Greenland for hydro-electricity and for hydrogen production appeared to be commercially attractive.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, and Énergie

Technical compatibility of natural gas distribution systems in the United States for commercial and residential distribution and utilization of hydrogen: Description of the natural gas distribution system. Compatibility and problems in hydrogen distribution. Use of hydrogen in commercial use and residential sector. Operating and procedural changes required.

General chemistry, physical chemistry, Chimie générale, chimie physique, Energy, Énergie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Technical compatibility of natural gas distribution systems in the United States for commercial and residential distribution and utilization of hydrogen: Description of the natural gas distribution system. Compatibility and problems in hydrogen distribution. Use of hydrogen in commercial use and residential sector. Operating and procedural changes required.

Economie de l'énergie, Energy economics, Energies nouvelles, New energies, General chemistry, physical chemistry, Chimie générale, chimie physique, Chemistry, and Chimie

Solar energy and its utilisation as an energy source, 1977: Photoelectric cell and thermodynamics solar power plant. Photosynthesis and plant efficiency. Food and fuel energy from plant matter.

General chemistry, physical chemistry, Chimie générale, chimie physique, Chemistry, Chimie, Economie de l'énergie, Energy economics, Energies nouvelles, and New energies

Solar energy and its utilisation as an energy source, 1977: Photoelectric cell and thermodynamics solar power plant. Photosynthesis and plant efficiency. Food and fuel energy from plant matter.

Economie de l'énergie, Energy economics, Nucléaire, Nuclear, General chemistry, physical chemistry, Chimie générale, chimie physique, Chemistry, and Chimie

Short article on nuclear power, 1977: The energy source and nuclear reactor types. Uranium processing and plutonium produced by the fast reactor. Total resources of nuclear energy very large.