TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Previous exposures to contaminated soil gas have been documented in the residential areas to the west of the landfill. These exposures were from inhalation of volatile organic compounds in indoor air. ... Installation and operation of the active soil gas venting system has reduced or eliminated this exposure. However, at times the system has been interrupted, resulting in some subsurface landfill gas migrating off-site.  3, record 1, English, - soil%20gas%20venting

Record number: 1, Textual support number: 2 CONT

[In a chapter dealing with groundwaters and soils.] Enhanced biodegradation during soil gas venting: soil bioventing and vapour-phase biotreatment.  4, record 1, English, - soil%20gas%20venting

Record number: 1, Textual support number: 3 CONT

Efforts to characterize and monitor VOCs [volatile organic compounds] and methane often include analyzing the distribution and concentration of VOCs and methane in soil gas in deep vadose(unsaturated) zones beneath a contaminated site. These factors are integral to determining transport to the underlying aquifer and to evaluate potential remediation alternatives such as soil-gas venting.  2, record 1, English, - soil%20gas%20venting

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Interpretation of the observed methane concentration is complicated in that a number of atmospheric chemical reactions involving methane and other constituents, such as carbon monoxide, can lead to increases or decreases in atmospheric methane concentration.... Observations made over the past decade at a number of stations show that the CH₄ concentration is increasing at about 2% per year.  1, record 2, English, - methane%20concentration

Record number: 2, Textual support number: 1 OBS

CH4 concentration: The number 4 is subscripted.  2, record 2, English, - methane%20concentration

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Certains auteurs pensent que la végétation se serait déjà adaptée à l'accroissement de la teneur en CO₂, ce qui amplifierait les variations saisonnières. Ce fait serait confirmé par l'accroissement de la teneur en méthane dans l'atmosphère (accroissement de 1% par an).  3, record 2, French, - teneur%20en%20m%C3%A9thane

Record number: 2, Textual support number: 1 OBS

teneur en CH4; concentration en CH4 : Le chiffre 4 s'écrit en indice.  2, record 2, French, - teneur%20en%20m%C3%A9thane

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The presence of gas is always trouble in a mine. Methane gas or marsh gas... can cause a powerful underground explosion, especially if accompanied by a high concentration of coal dust.  2, record 3, English, - underground%20explosion

Record number: 3, Textual support number: 2 CONT

... the biggest fear of the underground miners of the Elk Valley was far and away the fear of getting killed in an underground explosion ...  3, record 3, English, - underground%20explosion

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The concentration of methane... is also determined weekly by ENEA from collected gas samples. The participation of an ultralight aircraft... equipped with an optical particle counter(FSSP-300), a condensation nuclei counter, an ozone photometer, a global radiation pyranometer, and upward and downward looking UV-B radiometers is still uncertain, depending on the approval of the flight authorizations.  1, record 4, English, - global%20radiation%20pyranometer

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Pyranomètre à rayonnement global. Cet appareil mesure le flux de rayonnement solaire reçu sur une surface horizontale. Une ventilation permet l'élimination des condensations.  1, record 4, French, - pyranom%C3%A8tre%20%C3%A0%20rayonnement%20global

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

The mole fraction of hydrocarbon multiplied by 10⁶ measured on a methane-equivalence basis. [Definition officially approved by ICAO.]  1, record 5, English, - part%20per%20million%20carbon

Record number: 5, Textual support number: 1 OBS

Thus, 1 ppm of methane is indicated as 1 ppmC. To convert ppm concentration of any hydrocarbon to an equivalent ppmC value, multiply ppm concentration by the number of carbon atoms per molecule of the gas. For example, 1 ppm propane translates as 3 ppmC hydrocarbon; 1 ppm hexane as 6 ppmC hydrocarbon.  1, record 5, English, - part%20per%20million%20carbon

Record number: 5, Textual support number: 2 OBS

Engine emissions.  1, record 5, English, - part%20per%20million%20carbon

Record number: 5, Textual support number: 3 OBS

part per million carbon; ppmC: term and abbreviation officially approved by the International Civil Aviation Organization (ICAO).  2, record 5, English, - part%20per%20million%20carbon

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Proportion en moles d'hydrocarbure multipliées par 10⁶, mesurée en équivalent de méthane. [Définition uniformisée par l'OACI.]  1, record 5, French, - partie%20de%20carbone%20par%20million

Record number: 5, Textual support number: 1 OBS

Ainsi, une ppm de méthane est exprimée par une ppmC. Pour convertir la concentration en ppm d'un hydrocarbure en ppmC équivalente, on multiplie la concentration en ppm par le nombre d'atomes de carbone par molécule du gaz. Par exemple, une ppm de propane devient 3 ppmC; une ppm d'hexane, 6 ppmC.  1, record 5, French, - partie%20de%20carbone%20par%20million

Record number: 5, Textual support number: 2 OBS

partie de carbone par million; ppmC : terme et abréviation uniformisés par l'Organisation de l'aviation civile internationale (OACI).  2, record 5, French, - partie%20de%20carbone%20par%20million

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

La fracción mol de hidrocarburo multiplicada por 10⁶, medida por referencia al metano. [Definición aceptada oficialmente por la OACI.]  1, record 5, Spanish, - parte%20por%20mill%C3%B3n%20de%20carbono

Record number: 5, Textual support number: 1 OBS

Así pues, 1 ppm de metano se indica como 1 ppmC. Para convertir la concentración de una ppm de cualquier hidrocarburo a una ppmC equivalente, multiplíquese la concentración ppm por el número de átomos de carbono por molécula de gas. Por ejemplo, 1 ppm de propano equivale a 3 ppmC de hidrocarburo; 1 ppm de hexano equivale a 6ppmC de hidrocarburo.  1, record 5, Spanish, - parte%20por%20mill%C3%B3n%20de%20carbono

Record number: 5, Textual support number: 2 OBS

parte por millón de carbono; ppmC: término y abreviatura aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).  2, record 5, Spanish, - parte%20por%20mill%C3%B3n%20de%20carbono

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Although the concentration of atmospheric methane is more than two orders of magnitude lower than that of carbon dioxide, it cannot be ignored : the radiative properties of methane make it 20 times more effective molecule for molecule than carbon dioxide in absorbing radiant heat.  3, record 6, English, - radiative%20property

Record number: 6, Textual support number: 1 OBS

Useful in detecting certain gases.  4, record 6, English, - radiative%20property

Record number: 6, Textual support number: 2 OBS

radiative property; radiative characteristic: usually used in the plural form.  5, record 6, English, - radiative%20property

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Propriété qu'ont certaines substances d'agir sur le rayonnement électromagnétique.  2, record 6, French, - propri%C3%A9t%C3%A9%20radiative

Record number: 6, Textual support number: 1 CONT

Les gaz à effet de serre possèdent des molécules complexes qui ont un spectre de «vibration-rotation», une capacité d'absorber de l'énergie, assez riche. Grossièrement, on peut écrire que leurs propriétés radiatives dépendent à la fois de la nature de la molécule et de sa concentration.  3, record 6, French, - propri%C3%A9t%C3%A9%20radiative

Record number: 6, Textual support number: 1 OBS

propriété radiative : terme employé la plupart du temps au pluriel.  4, record 6, French, - propri%C3%A9t%C3%A9%20radiative

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

In this form of transport detector for h. p. l. c. [high-performance liquid chromatography], the eluate is deposited upon a fine stainless steel wire that has been cleaned by being heated at 850°C. The volatile solvent is evaporated and the solute oxidized at 700-800°C in air to a mixture of carbon dioxide and water. The oxidation products are mixed with hydrogen and passed over a nickel catalyst at 330°C to give methane which is burnt in a flame ionization detector to give an electrical signal that can be amplified and recorded. The detector gives a linear response over a wide concentration range [...] The sensitivity has been improved and the noise level reduced by using either a ceramic(kaolin) or ceramic-metal(kaolin and copper) coating to the wire.  1, record 7, English, - wire%20transport%20detector

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

Observed methane concentration is complicated in that a number of atmospheric chemical reactions involving methane and other constituents, such as carbon monoxide, can lead to increases or decreases in atmospheric methane concentration(...) Observations made over the past decade at a number of stations show that the CH4 concentration is increasing at about 2% per year.  1, record 8, English, - atmospheric%20methane%20concentration

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 CONT

Certains auteurs pensent que la végétation se serait déjà adaptée à l'accroissement de la teneur en CO2, ce qui amplifierait les variations saisonnières. Ce fait serait confirmé par l'accroissement de la teneur en méthane dans l'atmosphère (accroissement de 1% par an).  1, record 8, French, - teneur%20en%20m%C3%A9thane%20dans%20l%27atmosph%C3%A8re

Record 8,  Textual support,  Spanish