TERMIUM Plus^®

Record 1,  Textual support,  English

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The high flux isotope reactor(HFIR) is a nuclear research reactor [in the] United States.... HFIR is one of the highest steady-state neutron fluxes of any research reactor in the world. The thermal and cold neutrons produced by HFIR are used to study physics, chemistry, materials science, engineering, and biology.  2, record 1, English, - high%20flux%20isotope%20reactor

Record 1,  Textual support,  French

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Le réacteur isotopique à haut flux (HFIR) est un réacteur nucléaire de recherche situé [aux États-Unis. Le] HFIR est l'une des sources de neutrons les plus puissantes pour la recherche en physique de la matière condensée [...] Les neutrons thermiques et froids produits par [le réacteur] sont utilisés pour étudier la physique, la chimie, la science des matériaux, l'ingénierie et la biologie.  2, record 1, French, - r%C3%A9acteur%20isotopique%20%C3%A0%20haut%20flux

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

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Potassium is used extensively, mainly in the form of potassium salts, in various fields such as medicine(iodide as a disinfectant), photographic processing(carbonate), explosives(chlorate and nitrate as powder), defreezing agents, poisons(potassium cyanide), metallurgy and basic chemistry(hydroxide in, for example, strong bases, oil sweetening, CO₂ absorbent, chromate and dichromates as oxidants, carbonate in glass industry), fertilizers(nitrate, carbonate, chloride, bromide, sulfate), detergents and soaps(hydroxide and carbonate), coolants in nuclear reactors(NaK alloy), etc.  2, record 2, English, - potassium%20salt

Record 2,  Textual support,  French

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Les sels de potassium comme le nitrate de potassium sont des électrolytes. Solubles dans l'eau, ils s'y décomposent en formant des ions potassium, porteurs d'une charge positive. Les ions potassium sont présents dans l'alimentation et dans l'organisme.  3, record 2, French, - sel%20de%20potassium

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Record 3,  Textual support,  English

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For all we know electrons and quarks are elementary particles, which means that in no experiment has there anything like a structure of these particles been seen. They appear point-like, unlike the proton, neutron, nucleus and atom that have sizes that can be measured. It is, of course, entirely possible that particles that are called elementary today shall turn out to be composite; let it be said though that they have been probed quite extensively.... The aim is to know all about them, their properties and their interactions. The idea is that from this nuclear physics, atomic physics, chemistry, in fact, the whole physical world derives. Thus particles and their interactions are the very fundamentals of nature. That is the view now. An elementary particle physicist studies primarily these elementary particles and not the larger structures such as protons, nuclei or atoms.  1, record 3, English, - elementary%20particle%20physicist

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Record 4,  Textual support,  English

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The International Society of Magnetic Resonance(ISMAR) is the only international scientific organization that represents the whole range of the important research field of magnetic resonance(MR), in particular nuclear magnetic resonance(NMR), electron paramagnetic resonance(EPR), and magnetic resonance imaging(MRI). These and other MR-methods are used as main research tools in a very wide range of fields including physics, chemistry, life sciences, materials research and medicine.  1, record 4, English, - International%20Society%20of%20Magnetic%20Resonance

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Record 5,  Textual support,  English

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A new field of chemistry known as Nuclear Forensics is emerging as a powerful weapon in the fight against the illegal trafficking and use of radioactive materials... An article in the September issue of Chemistry in Britain... describes the techniques chemists are using to help restrict smuggling and black market trade in radioactive material.  1, record 5, English, - nuclear%20forensics

Record 5,  Textual support,  French

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Techniques et moyens mis en œuvre par des chimistes, dans un cadre judiciaire, afin de freiner ou de contrecarrer le vol de matières radioactives éventuellement revendues sur le marché noir.  1, record 5, French, - analyse%20nucl%C3%A9o%2Dl%C3%A9gale

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Équivalent formulé par la Direction recherche et développement de Framatome, France.  1, record 5, French, - analyse%20nucl%C3%A9o%2Dl%C3%A9gale

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Record 6,  Textual support,  English

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For a nuclide, the maximum activity attainable through activation of a certain sample in a certain particle flux density. [Definition standardized by ISO.]  2, record 6, English, - saturation%20activity

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In nuclear chemistry, for a specified isotope, the value of the activity of an irradiated element, when a state of saturation is reached.  3, record 6, English, - saturation%20activity

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saturation activity: term standardized by ISO.  4, record 6, English, - saturation%20activity

Record 6,  Textual support,  French

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Pour un nucléide, activité maximale atteinte par activation d'un échantillon donné sous un débit de fluence de particules donné. [Définition normalisée par l'ISO.]  2, record 6, French, - activit%C3%A9%20%C3%A0%20saturation

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activité à saturation : terme normalisé par l'ISO.  3, record 6, French, - activit%C3%A9%20%C3%A0%20saturation

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Record 7,  Textual support,  English

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The U. S. led the world in numbers and efficiency of nuclear power plants. The chemistry of wartime reprocessing had been adapted to the commercial fuel cycle, and experimental breeder reactors had furnished experience for the design and start of construction of a commercial-size demonstration plant.  1, record 7, English, - demonstration%20plant

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Centrale créée pour effectuer, tester et valider des recherches.  2, record 7, French, - centrale%20de%20d%C3%A9monstration

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Deux centrales de démonstration utilisant des réacteurs à neutrons thermiques, refroidis par de l'hélium sous pression élevée (40 et 48 bar respectivement), ont été construites et mises en service dans les années 1970 et 1980 [...]  1, record 7, French, - centrale%20de%20d%C3%A9monstration

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Record 8,  Textual support,  English

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Irradiation-Induced Stress Corrosion Cracking of Austenitic Stainless Steels. In recent years, failures of reactor internal components have been observed after the components have reached neutron fluence levels... The general pattern of the observed failures indicates that as nuclear plants age and fluence increases, various apparently nonsensitized austenitic stainless steels become susceptible to intergranular failure... Irradiation produces defects and defect clusters in grain matrices and alters the dislocation network, dislocation loop, and dislocation channel structures, leading to radiation-induced hardening. Irradiation also leads to changes in the stability of second-phase precipitates and the local chemistry near grain boundaries, precipitates, and defect clusters.  2, record 8, English, - irradiation%2Dassisted%20stress%20corrosion

Record 8,  Textual support,  French

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Principaux modes de dégradation sous irradiation [...] Les modifications [...] créées sous irradiation peuvent entraîner des conséquences à l'échelle du composant : altérations dimensionnelles (gonflement, croissance, fluage...), évolution des caractéristiques mécaniques (notamment durcissement et fragilisation), sensibilisation accrue au milieu chimique (corrosion sous contrainte assistée par l'irradiation) [...] L'effet simultané de ces modifications peut dans certains cas conduire à des synergies très néfastes (par exemple dans le cas des interactions pastille de combustible-gaine ou absorbant-gaine).  1, record 8, French, - corrosion%20sous%20contrainte%20assist%C3%A9e%20par%20l%27irradiation

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Record 9,  Textual support,  English

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The resonant absorption of electromagnetic energy by a system of atomic nuclei situated in a magnetic field. It is a branch of radiofrequency spectroscopy. The frequency of the magnetic resonance coincides with the frequency of the Larmor precession of the nuclei in the magnetic field and is proportional to the strength of the field.  4, record 9, English, - nuclear%20magnetic%20resonance

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Nuclear magnetic resonance may be used for the measurement of nuclear magnetic moments; for the precise measurement of magnetic fields; for obtaining information regarding the environment of nuclei in molecules, liquids and solids; and in chemical analysis.  4, record 9, English, - nuclear%20magnetic%20resonance

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Nuclear magnetic resonance.-New type of spectroscopy particularly important for organic chemistry.  5, record 9, English, - nuclear%20magnetic%20resonance

Record 9,  Textual support,  French

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Technique spectrographique qui consiste à placer le corps à étudier dans une induction magnétique intense (10 000 gauss) et réglable, en présence d'un champ électromagnétique de radiofréquence et en captant le signal réémis par l'échantillon.  3, record 9, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire

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L'intensité du signal recueilli est directement proportionnelle au nombre de protons responsables.  3, record 9, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire

Record 9,  Textual support,  Spanish

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Espectroscopía de radiofrecuencia o microondas basada en el campo magnético, generado por la rotación de núcleos de ciertos átomos cargados eléctricamente.  2, record 9, Spanish, - resonancia%20magn%C3%A9tica%20nuclear

Record 10,  Textual support,  English

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That part of chemistry which deals with the study of nuclei and nuclear reactions using chemical methods.  2, record 10, English, - nuclear%20chemistry

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In some countries, it is used in a broader sense to denote that part of chemistry which deals with the chemical aspects of nuclear science.  2, record 10, English, - nuclear%20chemistry

Record 10,  Textual support,  French

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Branche de la chimie ayant pour objet l'étude des noyaux et des réactions nucléaires en utilisant des méthodes chimiques.  2, record 10, French, - chimie%20nucl%C3%A9aire

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Dans certains pays ce terme est utilisé dans un sens plus large pour désigner la branche de la chimie ayant pour objet les aspects chimiques de la science nucléaire.  2, record 10, French, - chimie%20nucl%C3%A9aire

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Rama de la Química que se refiere a las sustancias producidas o afectadas por reacciones nucleares.  1, record 10, Spanish, - qu%C3%ADmica%20nuclear

Record 11,  Textual support,  English

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That part of chemistry which deals with radioactive materials. It includes the production of radionuclides and their compounds by processing irradiated or naturally occurring radioactive materials, the application of chemical techniques to nuclear studies, and the application of radioactivity to the investigation of chemical problems.  2, record 11, English, - radiochemistry

Record 11,  Textual support,  French

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Branche de la chimie concernant les matières radioactives. Elle comprend la production des radionucléides et de leurs composés par traitement de matières irradiées ou naturellement radioactives, l'application des techniques chimiques à des études nucléaires, et l'application de la radioactivité à l'étude des problèmes chimiques.  1, record 11, French, - chimie%20radioactive

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Record 12,  Textual support,  English

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This course is designed for chemistry students wishing to become familiar with the use of high resolution nuclear magnetic resonance(NMR) spectroscopy and mass spectrometry for the determination of molecular structure and dynamics in solution. The NMR part of the course deals with analysis of second-order proton spectra, with extraction of coupling constants and chemical shifts from spectra. Then the topics of pulsed and Fourier transform NMR are introduced and applied to natural abundance 13C spectra. Problem solving with combined 1H and 13C NMR data is emphasized. Subsequently the use of spin lattice relaxation times for dynamics is discussed, followed by an introduction to 2 dimensional(2D) NMR.  1, record 12, English, - 2%20dimensional%20NMR

Record 12,  Textual support,  French

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La RMN à deux dimensions peut être comparée à une réaction chimique, dont les composantes doivent être identifiées (ici par fréquence)avant et après la réaction.[...] Notons par ailleurs que la RMN 2D n'est pas limitée à l'observation des protons : deux expériences de corrélation ont été conçues pour relier des azotes, des carbones et des protons.  1, record 12, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire%20bidimensionnelle

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Terme et exemple tirés du «Technoscope».  1, record 12, French, - r%C3%A9sonance%20magn%C3%A9tique%20nucl%C3%A9aire%20bidimensionnelle

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Record 13,  Textual support,  English

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[In nuclear analytical chemistry], the linear-energy-transfer-dependent factor by which absorbed dose is multiplied to obtain dose equivalent.  1, record 13, English, - quality%20factor

Record 13,  Textual support,  French

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En chimie analytique nucléaire, [...] facteur dépendant du transfert linéaire d'énergie par lequel il faut multiplier les doses absorbées pour obtenir la dose équivalente.  1, record 13, French, - facteur%20de%20qualit%C3%A9

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Record 15,  Textual support,  English

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[In nuclear analytical chemistry], the ratio between the number of particles or photons detected and the number of similar particles or photons emitted by the radiation source.  1, record 15, English, - detection%20efficiency

Record 15,  Textual support,  French

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[En chimie analytique nucléaire], [...] rapport entre le nombre de particules ou de photons détectés et le nombre de particules ou photons similaires émis par la source de rayonnement.  1, record 15, French, - efficacit%C3%A9%20de%20d%C3%A9tection

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Record 16,  Textual support,  English

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... the ratio of the transtion probabilities for internal conversion and gamma ray emission.  1, record 16, English, - internal%20conversion%20coefficient

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[Applies in nuclear chemistry to] a transition between two specified energy levels of nuclide.  1, record 16, English, - internal%20conversion%20coefficient

Record 16,  Textual support,  French

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[...] rapport entre les probabilités des transitions de conversion interne et d'émission de rayonnement gamma.  1, record 16, French, - coefficient%20de%20conversion%20interne

Record number: 16, Textual support number: 1 OBS

[S'applique, en chimie nucléaire, à] une transition entre deux niveaux donnés d'énergie d'un nucléide.  1, record 16, French, - coefficient%20de%20conversion%20interne

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Record 17,  Textual support,  English

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[In nuclear chemistry], a transition between two energy states of a nucleus where the energy difference is given to an orbital electron which is thereby ejected from the atom.  1, record 17, English, - internal%20conversion

Record 17,  Textual support,  French

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[En chimie nucléaire], il s'agit d'une transition entre deux états d'énergie d'un noyau où la différence d'énergie est transmise à un électron orbitalaire qui est alors éjecté de l'atome.  1, record 17, French, - conversion%20interne

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Record 18,  Textual support,  English

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[In nuclear chemistry], a measurement under such well-defined conditions that the activity of a sample can be derived from the observed count rate.  1, record 18, English, - absolute%20counting

Record 18,  Textual support,  French

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[En chimie nucléaire], une mesure effectuée dans des conditions telles que l'on peut déduire l'activité d'un échantillon à partir d'un taux de comptage observé.  1, record 18, French, - comptage%20absolu

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Record 19,  Textual support,  English

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[In nuclear chemistry], a measurement in which the activity of a sample is derived from the ratio between the count rates observed for the sample and for a source of known activity.  1, record 19, English, - relative%20counting

Record 19,  Textual support,  French

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[En chimie nucléaire], une mesure de laquelle on déduit l'activité d'un échantillon du rapport entre les taux de comptage observés pour l'échantillon et pour une source d'activité connue.  1, record 19, French, - comptage%20relatif

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Record 20,  Textual support,  English

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[In nuclear chemistry], a coincidence of events occurring in not physically connected nuclei.  1, record 20, English, - random%20coincidence

Record 20,  Textual support,  French

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[En chimie nucléaire], une coïncidence d'événements qui se produisent dans des noyaux qui ne sont pas physiquement liés.  1, record 20, French, - co%C3%AFncidence%20al%C3%A9atoire

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Record 21,  Textual support,  English

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The open sets of [a given] Euclidean space are diffeomorphic images of [given] supersets of sets..., which are defined as chemical structures in [the nuclear configuration space R].(Source : International Journal of Quantum Chemistry. Quantum Biology Symposium no. 8, 1981, p. 189).  2, record 21, English, - diffeomorphic

Record 21,  Textual support,  French

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Soit [phi] un flot riemannien (c.-à-d. un feuilletage riemannien de dimension un orienté) sur une variété compacte M. Désignons par N l'adhérence d'une orbite de [phi]. On a alors [que] La variété N est difféomorphe à un tore T [k-indice]. (source : PASCAL).  1, record 21, French, - diff%C3%A9omorphe

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Record 22,  Textual support,  English

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XAS  1, record 22, English, - apparatus%20nuclear%20chemistry

Record 22,  Textual support,  French

Record number: 22, Textual support number: 1 OBS

R.I.N.F. 1969-57  1, record 22, French, - appareil%20de%20chimie%20nucl%C3%A9aire

Record 22,  Textual support,  Spanish