TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

In cloud physics, it is... of the utmost importance that surface tension should increase the equilibrium pressure with a decreasing-drop radius, while hygroscopic action should reduce it. Thus, only hygroscopie nuclei make the initial condensation phase in air possible.  2, fiche 1, Anglais, - equilibrium%20pressure

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 DEF

Pression qui permet à deux phases d'une même substance de rester en équilibre.  2, fiche 1, Français, - pression%20d%27%C3%A9quilibre

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

Substance used to provide condensation nuclei within a cloud(e. g., silver iodide, dry ice and other chemical hygroscopic particles) and dispersed from the ground, from an airplane or from a rocket.  1, fiche 2, Anglais, - seeding%20agent

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Substance utilisée pour fournir des noyaux de condensation dans un nuage (p. ex. iodure d'argent, neige carbonique et autres particules chimiques hygroscopiques) et dispersée à partir du sol, d'un avion ou d'une fusée.  1, fiche 2, Français, - agent%20d%27ensemencement

Fiche 2,  Justifications,  Espagnol

Record number: 2, Textual support number: 1 DEF

Sustancia utilizada para producir núcleos de condensación en una nube (por ejemplo, yoduro de plata, nieve carbónica y otras partículas químicas higroscópicas), dispersada a partir del suelo, de una aeronave o de un cohete.  1, fiche 2, Espagnol, - agente%20de%20siembra

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 DEF

A nucleus whose aqueous solution has an equilibrium vapour pressure lower than that of pure water.  2, fiche 3, Anglais, - hygroscopic%20nucleus

Record number: 3, Textual support number: 1 CONT

The exact form taken by hygroscopic nuclei is most frequently that of droplets of solution. It was established by Lord Kelvin that the vapour pressure over the surface of a water drop in equilibrium with its surroundings is greater than that over a plane water surface.... The vapour pressure over the surface of a solution is always less than that over pure water at the same temperature. For this reason, a solution is hygroscopic, and absorbs water vapour from the surrounding air, becoming diluted in the process. From this it follows that nuclei in the form of droplets of solution may be expected to be satisfactory condensation kerns. When particles of hygroscopic substances are exposed to sufficiently damp air, they become droplets of solution.  3, fiche 3, Anglais, - hygroscopic%20nucleus

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 DEF

Noyau dont la solution aqueuse a une pression de vapeur en équilibre plus basse que celle de l'eau pure.  2, fiche 3, Français, - noyau%20hygroscopique

Fiche 3,  Justifications,  Espagnol

Record number: 3, Textual support number: 1 DEF

Núcleo cuya solución acuosa tiene una presión de vapor en equilibrio más baja que la del agua pura.  2, fiche 3, Espagnol, - n%C3%BAcleo%20higrosc%C3%B3pico

Fiche 4,  Justifications,  Anglais

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Small solid particles around which water condensates (cloud formation)  2, fiche 4, Anglais, - hygroscopic%20nucleus

Record number: 4, Textual support number: 1 CONT

Condensation on hygroscopic nuclei may begin at a relative humidity much lower than 100 per cent(about 75 per cent for sodium chloride) ;while on so-called non-hygroscopic nuclei, which merely furnish sufficiently large(by molecular standards) wettable surfaces, relative humidities of nearly 100 per cent are required.  3, fiche 4, Anglais, - hygroscopic%20nucleus

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Noyau de condensation, constitué par des solutions aqueuses de sels (chlorures de magnésium, de sodium, de calcium) ou d'acide (sulfurique, nitreux), intervenant dans la genèse des pluies.  2, fiche 4, Français, - noyau%20hygroscopique

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 CONT

Hygroscopic substances exhibit a chemical attraction for water, which encourages condensation of water vapour on them in preference to other substances. This same attraction is capable of causing condensation in an atmosphere which is not saturated. It appears that hygroscopic substances possess in general more satisfactory qualities as nuclei than do non-hygroscopic substances.  3, fiche 5, Anglais, - hygroscopic%20substance

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 CONT

noyaux de condensation. Ils sont constitués par des substances solides hygroscopiques, provenant soit de la mer (NaCl), soit de pollutions locales (résidus de combustion). Leur diamètre est compris entre 0,1 et 1 micromètre. Ils sont à l'origine de la formation des nuages, les fines gouttelettes d'eau se condensant dessus.  3, fiche 5, Français, - substance%20hygroscopique

Fiche 5,  Justifications,  Espagnol