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WELL CRYSTAL [16 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2024-02-23

English

Subject field(s)
  • Scientific Instruments
  • Radiation Protection
  • Radiobiology
  • Nuclear Medicine
CONT

A well counter is a device used for measuring radioactivity in small samples. It usually employs a sodium iodide crystal detector.

Key term(s)
  • well type counter

French

Domaine(s)
  • Instruments scientifiques
  • Radioprotection
  • Radiobiologie
  • Médecine nucléaire

Spanish

Save record 1

Record 2 2013-06-21

English

Subject field(s)
  • Audiovisual Techniques and Equipment
  • Video Technology
CONT

Video projectors : these units use either LCD [liquid crystal display] or Tri-tube technology and have a built-in light source and projection lens. They are capable of displaying images from a range of equipment, such as document cameras... as well as VCRs and computers.

Key term(s)
  • videoprojector

French

Domaine(s)
  • Audiovisuel (techniques et équipement)
  • Vidéotechnique
DEF

Appareil de vidéoprojection.

CONT

Un vidéoprojecteur [...] permet de projeter une vidéo sur grand écran, qu'elle provienne d'un ordinateur, d'un lecteur de DVD ou [d'un autre appareil].

Key term(s)
  • vidéo-projecteur

Spanish

Campo(s) temático(s)
  • Técnicas y equipo audiovisuales
  • Técnicas de video
CONT

El videoproyector (comúnmente llamada cañón) proyecta imágenes de vídeo o de computadora en una pantalla. Recibe señal de videocaseteras de cualquier formato y de computadoras con resolución VGA.

Save record 2

Record 3 2012-04-17

English

Subject field(s)
  • Photoelectricity and Electron Optics
  • Radio Broadcasting
  • Optical Telecommunications
CONT

The crystal is a new host for Nd lasers. Here it acts as a magneto-optic modulator as well as a laser medium.

French

Domaine(s)
  • Photo-électricité et optique électronique
  • Radiodiffusion
  • Télécommunications optiques
DEF

Modulateur optique qui se sert de l'effet magnéto-optique.

Spanish

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Record 4 2011-09-09

English

Subject field(s)
  • Gemmology
DEF

Transparent colourless quartz ...

OBS

Rock crystal is the name given to all clear colorless quartz. It is widely used as a popular ornamental stone and is also used as a gemstone... The most common use for rock crystal is in ornamental carvings. A well known ornamental carving for rock crystal is the crystal ball of fortune-telling fame.

OBS

Rhine diamond, Cornish diamond, Alaska diamond: meliorative terms to be avoided.

OBS

Cornish diamond: A quartz crystal from Cornwall.

French

Domaine(s)
  • Gemmologie
DEF

Quartz incolore, montrant des faces cristallines bien développées.

Spanish

Save record 4

Record 5 2011-04-26

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
(Na,Ca,Sr,Ba,Ce)6(CO3)5
formula, see observation
CONT

Burbankite is a rare strontium and cerium carbonate mineral. Burbankite is one of many rare minerals that come from the famous mineral locality, Mont Saint-Hilaire, Quebec, Canada. Some specimens have been cut from there and in fact a large 6. 62 carat orange stone is the North American record holder for this species. But burbankite is far too rare to be considered a mainstream gemstone. Its crystal habit is reminiscent of apatite although its color and size is generally quite different. Burbankite's crystals are typically quite small but well formed and make good micromounts.

OBS

Chemical formula: (Na,Ca,Sr,Ba,Ce)6(CO3)5

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
(Na,Ca,Sr,Ba,Ce)6(CO3)5
formula, see observation
DEF

Minéral (carbonate) du système cristallin hexagonal, se présentant en masses clivables jaunes à blanc grisâtre.

OBS

Formule chimique : (Na,Ca,Sr,Ba,Ce)6(CO3)5

Spanish

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Record 6 2011-01-11

English

Subject field(s)
  • Radiological Physics (Theory and Application)
  • Mineralogy
  • Scientific Measurements and Analyses
DEF

Analysis of the crystal structure of materials by passing X-rays through them and registering the diffraction (scattering) image of the rays.

CONT

Qualitative X-ray diffraction(XRD) analysis is used to identify minerals based on their crystal structure. We provide standard XRD analysis as well as clay XRD analysis, which involves processing the sample to produce diagnostic changes in clay XRD peak positions and sizes.

OBS

X-ray diffraction analysis: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • X-rays diffraction analysis
  • X ray diffraction analysis
  • X rays diffraction analysis

French

Domaine(s)
  • Physique radiologique et applications
  • Minéralogie
  • Mesures et analyse (Sciences)
DEF

Technique d'analyse basée sur la diffraction des rayons X sur la matière.

CONT

L'analyse par diffraction des rayons X est l'une des méthodes les plus utilisées pour identifier les minéraux. Elle est surtout utilisée pour l'identification des minéraux argileux, en raison de leur taille se situant en dessous 0,1 micron. La méthode est basée sur la loi de Bragg utilisant les distances interatomiques de chaque minéral analysé. Le diffractogramme en est la représentation graphique.

CONT

Analyse par diffraction X. L'analyse par diffraction des rayons X ou diffractométrie X permet de déterminer les distances interatomiques et l'arrangement des atomes dans les réseaux cristallins. Comme les rayons X sont diffractés de façon différente par les éléments du réseau suivant la construction de ce dernier, l'irradiation de la matière par rayons X permet de connaître sa nature cristallographique.

CONT

Une telle hétérogénéité minéralogique ne peut être mise en évidence que par une analyse DRX; elle est, par ailleurs, fonction de l'appartenance stratigraphique des couches argileuses.

OBS

diffractométrie de rayons X; diffractométrie X : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Key term(s)
  • analyse par diffraction des rayons-X

Spanish

Save record 6

Record 7 2008-11-05

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
CONT

Another feature of [the Present Weather sensors] Vaisala’s FD12P is the capability to distinguish between several types of solid precipitation: Snow, ice pellets/sleet, hail, ice crystals, snow grains, snow pellets, freezing drizzle and freezing rain.

CONT

Types of solid precipitation. Ice crystals ... ice particles ... hailstones ...

CONT

Snow crystals generally have a hexagonal pattern, that present many beautiful external shapes. According to an international classification there are seven types of snow crystals, namely: plates; stellars; columns; needles; spatial dendrites; capped columns and irregular crystals. There are also three other types of solid precipitation that are called graupel, sleet and hail.

OBS

In the consulted sources, the term "solid precipitations" seems to include "frozen precipitations"(snow, snow pellets, ice pellets, snow grains, ice crystal, hail) as well as "freezing precipitations"(freezing rain, freezing drizzle). When "solid precipitations" does not include "freezing precipitations", it can be considered as synonym of "frozen precipitations".

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
CONT

[Les] précipitations solides [...] comprennent la neige, le grésil, la grêle, les cristaux de glace et aux fins de mesure des précipitations, la pluie verglaçante.

CONT

Suivant leur mode de formation et la dimension des particules qui les composent, on distingue plusieurs types de précipitations solides. La neige [...] La neige en grains [...] La neige roulée [...] Le poudrin de glace [...] Les granules de glace [...] Le grésil [...] La grêle [...] Les particules solides peuvent atteindre des tailles beaucoup plus importantes. Ainsi, les flocons de neige peuvent dépasser 2 cm et le plus gros grêlon recueilli et analysé à ce jour avait une taille d'environ 17 cm et pesait 770 g.

OBS

Selon certains auteurs, les «précipitations solides» incluent parfois les «précipitations verglaçantes».

OBS

précipitation solide : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 7

Record 8 2007-06-22

English

Subject field(s)
  • Atmospheric Physics
  • Atmospheric, Climatic and Meteorological Phenomena
CONT

... bond formation is closely related to snow strength. Formation of bonds occurs by diffusion of water vapor through the pore space between grain as well as by molecular motion on the surfaces when crystals touch. Therefore, like metamorphism, bond formation is strongly affected by conditions at and near crystal and grain surfaces. Although curvature effects are not generally the primary driving force to move the water vapor through the pore space in an alpine snowpack, they can play a role in determining where water vapor molecules condense on a crystal to form a bond.

CONT

Cold temperatures will decrease the strength of the bonds between grains, weakening the layers. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]

OBS

bond: term officially approved by the Avalanche Bulletin Terminology Standardization Committee.

French

Domaine(s)
  • Physique de l'atmosphère
  • Phénomènes météorologiques, climatiques et atmosphériques
DEF

Lien existant entre les grains de neige.

CONT

Dans ce régime de métamorphose, à l'échelle de la strate de neige, on assiste à une densification rapide avec arrondissement et grossissement des grains, mais, d'un point de vue mécanique, la disparition des liaisons entre les grains diminue fortement la cohésion globale.

CONT

Les températures froides diminueront la résistance des liaisons entre les grains de neige, fragilisant ainsi les couches du manteau neigeux. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]

OBS

liaison : terme uniformisé par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.

Spanish

Save record 8

Record 9 2006-11-23

English

Subject field(s)
  • Audiovisual Techniques and Equipment
  • Video Technology
  • Computer Graphics
DEF

[A] HDTV [high definition television] or monitor that uses [an array of fixed] pixels to produce an image, including flat-panel LCD [liquid-crystal display] and plasma screens as well as rear-projection microdisplays and front projectors that use DLP [digital light display], LCD or LCoS [liquid crystal on silicon] technology.

French

Domaine(s)
  • Audiovisuel (techniques et équipement)
  • Vidéotechnique
  • Infographie
DEF

Téléviseur ou écran à haute définition, notamment les modèles à cristaux liquides, à plasma et à projection arrière, qui fait appel à la technologie des matrices à pixels fixes pour afficher ses images.

OBS

La technologie Fixed Pixel [pixels fixes] permet d'éliminer les lignes de balayage : l'affichage est donc fluide et ne scintille pas. La qualité d'image supérieure se combine à une technologie audio avancée pour créer une expérience de jeu vidéo incroyable.

Spanish

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Record 10 2005-02-15

English

Subject field(s)
  • Petroleum Technology - Equipment
  • Photoelectricity and Electron Optics
DEF

Technology that combines sensors and remote control to detect production problems and solve them without costly well intervention.

CONT

... with advancements in material science, electronics, and data acquisition and processing, we have seen the use of sensors in oil well production turn in to what is now being referred to as "smart-well technology. "With sensors located downhole(below ground), above ground, in the storage tanks, and even on the pump motors to detect low frequency vibrations that can indicate potential wear, "smart" is exactly what these wells are becoming.... There are a variety of sensors currently used for downhole monitoring ranging from fiber optic to acoustic to quartz crystal sensors.

CONT

Representing a step-change in intelligent well control technology, the new multi-drop capability for hydraulic, downhole flow control valves supports the industry’s overall objectives. These include improving reservoir recovery, and removing complexity and operating capital for future interventions. They also include ... effective monitoring and control for production management.

OBS

Much has been ... written about intelligent well technology (IWT), but not everyone agrees as to what constitutes an intelligent well (IW). Some feel that merely the use of permanent downhole gauges (PDGs) that monitor and collect wellbore and/or reservoir data, constitutes an IW. Then there are others who believe that use of simple hydraulic-controlled, remote-operated, downhole-flow-control devices with only on/off position control but no downhole monitoring, should be considered an IW. A definition accepted .... among others, is that an IW installation is one that includes all of the following capabilities: Monitoring: The ability to monitor wellbore and/or reservoir characteristics in real time; Optimization: Analyze the data from monitoring, and pro-actively adjust flow regimes from multiple zones or laterals; Flow control: Utilization of remotely operated downhole-flow-control devices ... for adjustment of flow regimes.

OBS

The development of intelligent well technology began in the late 1980s. New downhole technology to better monitor and control production without intervention was seen as a solution to maximize the potential of aging reservoirs. Applications for permanent seismic sensing as a reservoir optimization tool grew out of conventional borehole seismic techniques that have been used for many years.

Key term(s)
  • smart well technology

French

Domaine(s)
  • Appareillage (Technologie pétrolière)
  • Photo-électricité et optique électronique
OBS

Gestion intégrée des réservoirs permettant d'extraire jusqu'à 60 % des réserves au lieu des 35 % actuels (géophysique multidimensionnelle et multicomposantes, puits intelligents, réseaux de capteurs de contrôle permanent.

Spanish

Save record 10

Record 11 2005-02-15

English

Subject field(s)
  • Petroleum Technology - Equipment
  • Photoelectricity and Electron Optics
CONT

Production optimization solutions consisting of well-site computer hardware, desktop analysis software, fiber-optic intelligent-well technology used in the oil and gas industry to remotely monitor and optimize downhole conditions and well production.

CONT

eProduction Solutions, Inc. is the world leader in production optimization solutions for flowing wells and all forms of artificial lift. The company provides advanced fiber optic intelligent well technology with well site and desktop intelligence as well as control systems for onshore and offshore production. eP provides hardware and software solutions for comprehensive production operations optimization including real-time monitoring, controlling, designing, and analyzing production oil and gas wells and facilities.

OBS

intelligent well technology: Technology that combines sensors and remote control to detect production problems and solve them without costly well intervention.

OBS

Optimizing reservoir performance with intelligent well technology. ... IWT is a key building block of real time reservoir management. By placing sensors and control valves at the reservoir face, teams of petroleum engineers can monitor reservoir and well performance in real time, analyze data, make decisions and modify the completion without physical intervention, to optimize asset performance.

OBS

... with advancements in material science, electronics, and data acquisition and processing, we have seen the use of sensors in oil well production turn in to what is now being referred to as "smart-well technology. "With sensors located downhole(below ground), above ground, in the storage tanks, and even on the pump motors to detect low frequency vibrations that can indicate potential wear, "smart" is exactly what these wells are becoming.... There are a variety of sensors currently used for downhole monitoring ranging from fiber optic to acoustic to quartz crystal sensors.

French

Domaine(s)
  • Appareillage (Technologie pétrolière)
  • Photo-électricité et optique électronique
OBS

De nouvelles méthodes géophysiques et analytiques seront testées : [...] capteur à fibre optique pour l'enregistrement des déformations dans le forage; contrôle permanent des fluides chimiques dans les puits et diverses sources; réseau permanent d'électrodes dans les puits cimentés pour la surveillance de l'écoulement des fluides [...]

OBS

Les chercheurs d'ISIS utilisent un matériau plus solide et doté d'une durée de vie plus longue que les matériaux conventionnels pour la construction d'infrastructures. À ce matériau, ils ajoutent des réseaux de capteurs à fibres optiques et des faisceaux laser ce qui leur permet de surveiller en tout temps les tensions et les contraintes exercées sur les structures [...] La technologie «intelligente» d'ISIS peut également servir à recouvrir ou à rapiécer les structures de béton existante afin d'améliorer leur rendement et leur durabilité.

Spanish

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Record 12 2003-11-20

English

Subject field(s)
  • Biochemistry
CONT

Enantioselectivity in Lipase-Catalyzed Transformations. he Rhizomucor miehei lipase(RmL) crystal structures of the opened(red) and closed forms superimposed to reveal structural differences. Lipases hydrolyze esterbonds in water/buffer solutions. They function well also in organic solvents catalyzing the synthetic reaction, esterification or transesterification. When racemic substrates, i. e. alcohols or acids are used, different degrees of Enantioselectivity, E, can be found depending on several variables.

French

Domaine(s)
  • Biochimie
DEF

Capacité qu'on certains enzymes parmi un couple d'énantiomères (deux isomères qui sont chacun le reflet de l'autre dans un miroir) la molécule avec laquelle elles vont de préférence réagir est une caractéristique des enzymes très importantes pour certaines applications, notamment en chimie; elle aussi fait l'objet de travaux d'évolution dirigée.

OBS

Tiré du Technoscope.

Spanish

Campo(s) temático(s)
  • Bioquímica
DEF

Diferencia de reconocimiento quiral de los enantiómeros por los sistemas vivientes.

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Record 13 2003-10-09

English

Subject field(s)
  • Orbital Stations
  • Research Experiments in Space
CONT

The Protein Crystallisation Diagnostic Facility(PCDF) offers a multi-user research facility to enable an in-depth knowledge and understanding of protein crystal growth processes under microgravity conditions without convection and sedimentation effects. The PCDF will be accommodated in the European Drawer Rack. The PCDF comprises a process unit and an electronics unit. The process unit includes a process chamber housing experiment boxes containing the reactors in which experiment solutions are hosted as well as the reactor control electronics. The experiment boxes include drive systems for the individual injection of solutions into the reactors, complemented by a stirrer for experiment solution distribution. Diagnostics are provided within the process chamber or can be installed directly in the experiment boxes. The electronics unit accommodates all the controls for performing experiments as well as the interfaces to the European Drawer Rack.

OBS

protein crystallization diagnostics facility; PCDF: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
  • Travaux de recherche dans l'espace
OBS

...] le «Protein Crystallisation Diagnostics» Facility (PCDF) pour la cristallisation de macro-molécules biologiques et l'étude de leurs réactions à la pesanteur [...] permet d'effectuer des mesures détaillées et d'apporter des modifications précises à la température et à la concentration des molécules. Cet appareil [permet d'approfondir] les expériences menées par l'«Advance Protein Crystallisation Facility» (APCF).

OBS

module de diagnostic pour la cristallisation des protéines; PCDF : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 13

Record 14 2003-02-26

English

Subject field(s)
  • Physics of Solids
  • Research Experiments in Space
CONT

Travelling Heater Growth... The aim of this experiment is to improve the crystal quality by investigating the following objectives under reduced gravity as well as under earth conditions : dopant and composition inhomogeneities(striations) on the macro and micro scale(axial and radial distribution), crystal perfection with respect to low defect density, the distribution of defects and the residual impurity concentration, studies of the influence of different transport phenomena in the solution/melt zone on the crystal growth mechanisms...

French

Domaine(s)
  • Physique des solides
  • Travaux de recherche dans l'espace

Spanish

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Record 15 2000-06-21

English

Subject field(s)
  • Physics of Solids
CONT

We saw in the introduction that the facets of a(quasi) crystal as well as its diffraction diagram clearly reveal a certain kind of symmetry. This symmetry is expressed by the set of rotations that leave the directions of the facets unchanged, or the set of rotations that leave the positions of the Bragg peaks in the diffraction diagram unchanged.

French

Domaine(s)
  • Physique des solides
CONT

Un diagramme de diffraction est une figure d'interférences créée par la superposition des ondes (rayons X, électrons ou neutrons) réfléchies dans une direction donnée par les atomes d'un cristal. La direction qui donne lieu à des interférences constructives, c'est-à-dire à une tache, correspond à des ondes diffractées décalées d'un nombre entier de longueur d'onde. Cette direction indique la distance qui sépare les plans atomiques, lesquels constituent autant de «miroirs» pour les ondes produites par la source éclairant l'échantillon. L'ensemble des taches de diffraction reflète l'arrangement des plans atomiques qui définissent le cristal.

Spanish

Save record 15

Record 16 1999-11-10

English

Subject field(s)
  • Metallurgy - General
DEF

A crystal structure whose unit cell structure has equivalent points occurring at corners as well as at centres of a six-faced shape, such as a cube.

Key term(s)
  • face-centered cubic

French

Domaine(s)
  • Métallurgie générale
CONT

Un métal de structure cubique à faces centrées comme le cuivre.

Spanish

Save record 16

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