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GAS CONTRAST [8 records]

Record 1 2016-06-17

English

Subject field(s)
  • Metal Forming
CONT

[In contrast to] hydroforming,... a metal-shaping process that uses high-pressure fluid to form tubes into complex structural shapes, warm forming uses gas at elevated temperatures to shape tubes when even greater pressures are required to form specific materials.

OBS

hot forming: term standardized by Environment Canada and the Translation Bureau for use in the Air Pollutant Emission Inventory Report.

French

Domaine(s)
  • Formage des métaux
CONT

[Contrairement à] l'hydroformage, [...] un processus dans lequel un fluide sous haute pression sert à conférer une forme complexe à un tube, le formage à chaud, qui emploie du gaz à haute température, est utilisé lorsqu'il faut une pression plus élevée pour donner la forme voulue à des tubes de certaines matières.

OBS

formage à chaud : terme normalisé par Environnement Canada et le Bureau de la traduction dans le cadre de l'Inventaire des émissions de polluants atmosphériques.

Spanish

Save record 1

Record 2 2012-02-28

English

Subject field(s)
  • Radiography (Medicine)
DEF

A substance that is introduced into or around a structure and, because of the difference in absorption of x-rays by the contrast medium and the surrounding tissues, allows radiographic visualization of the structure.

CONT

Three main groups of contrast media are employed :gas(air, oxygen, or carbon dioxyde), barium sulfate, and organic iodine compounds.

Key term(s)
  • radiopaque dye

French

Domaine(s)
  • Radiographie (Médecine)
DEF

Substance absorbant les rayons X et rendant visible, en radiologie, les structures du corps en produisant un contraste artificiel.

OBS

Ce contraste, peut être opacifiant, éclaircissant ou mixte.

Spanish

Campo(s) temático(s)
  • Radiografía (Medicina)
DEF

Sustancia opaca a los rayos X que se introduce en una parte del cuerpo para hacerla visible radiológicamente.

Key term(s)
  • tinte
  • solución opaca
Save record 2

Record 3 2011-01-06

English

Subject field(s)
  • Analytical Chemistry
CONT

In contrast to the automatic recording instruments monitoring volume increases at constant pressure, van de Craats maintained the volume constant and recorded automatically the pressure changes by means of an electromagnetic manometer devised by Kinkel.... In addition to van de Craats’ work with pressure-sensing devices, Novák and Janák constructed a detector which represents the pneumatic analog of a Wheatstone bridge, employing the dynamic effects of pneumatic obstructions such as capillaries and constrictions for determining component fractions emerging from the gas chromatographic column. Requiring no electrical power yet having an accuracy comparable to high precision thermal conductivity cells, it expresses the pressure differential, either differentially or integrally, caused by the eluted component as a diagonal from zero. Furthermore, the substance analyzed is never in contact with the detector.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 3

Record 4 2006-04-12

English

Subject field(s)
  • Environmental Law
  • Anti-pollution Measures
DEF

A unit of Greenhouse Gas reductions that has been generated and certified under the provisions of Article 12 of the Kyoto Protocol, the Clean Development Mechanism(CDM). In contrast, Emissions Reduction Units(ERUs) are used for Joint Implementation(JI) under Article 6 of the Protocol. According to Article 12, CERs must be "certified" by operational entities to be designated by the Conference of the Parties(COP) serving as the Meeting of the Parties(MOP).

French

Domaine(s)
  • Droit environnemental
  • Mesures antipollution
CONT

Un mécanisme pour un développement «propre» accorde un crédit par le biais du financement de projets visant à réduire ou à éviter les émissions dans des pays en développement. Cela promet de constituer une nouvelle voie d'importance par laquelle les gouvernements et les organismes privés transféreront des technologies propres et encourageront le développement durable. Le crédit sera attribué sous forme d'unités de réduction certifiée des émissions.

OBS

Source(s) : Protocole de Kyoto sur les changements climatiques/Mémoire au Cabinet sur les changements climatiques.

Spanish

Campo(s) temático(s)
  • Derecho ambiental
  • Medidas contra la contaminación
OBS

fuente: Protocolo de Kyoto.

Save record 4

Record 5 2004-08-04

English

Subject field(s)
  • Soil Mechanics (Engineering)
  • Soil Science
DEF

A group of soil particles cohering in such a way that they behave mechanically as a unit.

CONT

Soil aggregate... The term aggregate refers to the soil itself, in contrast to its constituent parts. Qualitatively, soil aggregates may differ in texture, structure, and consistency. Quantitatively, they may differ in porosity, relative density, water and gas content, and also in consistency. The qualitative information is obtained in the field by visual inspection... The quantitative information is obtained by means of laboratory and field tests. Without such information the description of any soil is inadequate.

French

Domaine(s)
  • Mécanique des sols
  • Science du sol
DEF

Assemblage de particules de sol adhérant entre elles et formant, du point de vue de la mécanique, une unité.

OBS

Employé au singulier, terme équivalent à sol, considéré en tant que matériau composite.

Spanish

Campo(s) temático(s)
  • Mecánica del suelo
  • Ciencia del suelo
Save record 5

Record 6 2003-09-10

English

Subject field(s)
  • Environmental Studies and Analyses
CONT

SPI, or Sediment Profile Imagery, is an innovative and cost efficient method of surveying and/or monitoring lake or marine aquatic environments with a view to establishing the environmental status of these habitats or as part of a site suitability study.... SPI is based on single lens reflex(SLR) camera photography and computer-based image analysis which greatly accelerates the time required to write reports and provide relevant data to the client/legislator in a matter of weeks. SPI technology can readily quantify over 20 physical, chemical and biological parameters including : sediment grain size; prism penetration; surface pelletal layer; sediment surface relief; mud clasts; redox area; redox contrast; current apparent redox boundary; relict redox boundaries; methane gas vesicles; apparent faunal dominants; voids; burrows; surface features(e. g. worm tubes, epifauna, shell) ;dredged material; microbial aggregations; and successional stage.

French

Domaine(s)
  • Études et analyses environnementales
CONT

Des photographies de profils sédimentaires obtenus de carottes prélevées à l'aide de carottiers en plexiglass Hargrave ont servi à mettre au point un moyen nouveau pour déterminer l'enrichissement en matières organiques. Des plongeurs autonomes prélèvent des carottes de sédiments pouvant aller jusqu'à 30 cm de longueur; une fois ramenées à la surface, les carottes sont photographiées, sous-échantillonnées et interprétées. L'interprétation repose sur la profondeur de discontinuité de l'oxydo-réduction et la présence ou l'absence d'organismes, de terriers et de vides, tels que révélés par les photographies numériques. On obtient ainsi un nombre intégré attribuable à l'indice d'enrichissement organique. M. Wildish a prouvé la justesse de cette méthode, appelée imagerie de profils sédimentaires (IPS), aux sites salmonicoles de la baie de Fundy et on prévoit aussi la mettre à l'essai à des installations semblables en Tasmanie (Australie).

Spanish

Save record 6

Record 7 2003-06-23

English

Subject field(s)
  • Radiography (Medicine)
  • Diagnostic Procedures (Medicine)
  • Nervous System
DEF

Radiological examination of the ventricles, cisterns and subarachnoid spaces of the brain by the introduction of a contrast substance, usually a gas, through a lumbar or cisternal injection.

OBS

According to some authors, this term is rarely used.

French

Domaine(s)
  • Radiographie (Médecine)
  • Méthodes diagnostiques (Médecine)
  • Système nerveux

Spanish

Campo(s) temático(s)
  • Radiografía (Medicina)
  • Procedimientos diagnósticos (Medicina)
  • Sistema nervioso
DEF

Representación gráfica del cerebro mediante toma de radiografías en la que se utiliza aire o algún gas como medio de contraste.

OBS

Este procedimiento se utiliza en el diagnóstico del cáncer cerebral.

Save record 7

Record 8 1996-05-10

English

Subject field(s)
  • Analytical Chemistry
CONT

However, using pure helium as the carrier gas, several investigators have proposed direct methods for permanent gas analysis in contrast to Willis's indirect procedure using argon containing small amounts of ethylene or acetylene, the permanent gases being detected by their quenching effects upon the standing current of the impure argon.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 8

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