aerosol

aerosol
/air"euh sawl', -sol'/, n.
1. Physical Chem. a system of colloidal particles dispersed in a gas; smoke or fog.
2. a liquid substance, as a disinfectant or deodorant, sealed in a metal container under pressure with an inert gas or other activating agent and released as a spray or foam through a push-button valve or nozzle: an aerosol for cleaning ovens.
3. See aerosol bomb.
adj.
4. of or containing a liquid or gas under pressure for dispensing as a spray or foam: a deodorant available in aerosol cans.
[1920-25; AERO- + SOL4]

* * *

System of tiny liquid or solid particles evenly distributed in a finely divided state through a gas, usually air.

Aerosol particles participate in chemical processes and influence the electrical properties of the atmosphere. Though true aerosol particles range in diameter from a few nanometres to about one micrometre, the term is commonly used to refer to fog or cloud droplets and dust particles, which can have diameters of more than 100 micrometres. See also colloid; emulsion.

* * *

      a system of liquid or solid particles uniformly distributed in a finely divided state through a gas, usually air. Aerosol particles play an important role in the precipitation process, providing the nuclei upon which condensation and freezing take place. They participate in chemical processes and influence the electrical properties of the atmosphere.

      True aerosol particles range in diameter from a few millimicrometres to about 1 micrometre (equal to 10-4 cm). When smaller particles are in suspension, the system begins to acquire the properties of a true solution; for larger particles, the settling rate is usually so rapid that the system cannot properly be called a true aerosol. Nevertheless, the term is commonly employed, especially in the case of fog or cloud droplets and dust particles, which can have diameters of over 100 micrometres.

      In general, aerosols composed of particles larger than about 50 micrometres are unstable unless the air turbulence is extreme, as in a severe thunderstorm. Particles with a diameter of less than 0.1 micrometre are sometimes referred to as Aitken nuclei.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • aérosol — [ aerɔsɔl ] n. m. • 1928; de aéro et 4. sol 1 ♦ Phys. Suspension dans un milieu gazeux (l air ou tout autre gaz) de particules colloïdales solides ou liquides. Le brouillard, les nuages sont des aérosols. 2 ♦ Cour. Système ou appareil qui… …   Encyclopédie Universelle

  • Aerosol — Aérosol Transports de poussières/aérosols jusqu au Canaries à partir du Sahara (Image Terra/MODIS 17.02.2004) …   Wikipédia en Français

  • aerosol — AEROSÓL, aerosoli, s.m. (Mai ales la pl.) Sistem prin care se realizează împrăştierea mecanică în aer1 sau într un gaz a unor particule solide sau lichide şi care este folosit în medicină în tratamentul unor boli, în agricultură la combaterea… …   Dicționar Român

  • aerosol — m. fís. Suspensión de partículas sólidas o líquidas muy finas en un gas. ⊆ instrum. Recipiente estanco a presión que permite descargar su contenido, ya sea líquido o un sólido disuelto en un líquido; el resultado es la emisión de un aerosol… …   Diccionario médico

  • aerosol — (Del fr. aérosol). 1. m. Suspensión de partículas ultramicroscópicas de sólidos o líquidos en el aire u otro gas. 2. Sistema coloidal obtenido por dispersión de sustancias sólidas o líquidas en el seno de un gas. 3. Líquido que, almacenado bajo… …   Diccionario de la lengua española

  • Aerosol — (m) eng aerosol, spray …   Arbeitssicherheit und Gesundheitsschutz Glossar

  • aerosol — sustantivo masculino 1. (no contable) Suspensión en un gas de pequeñas partículas de un líquido o de un sólido. 2. Líquido almacenado a presión en un envase que puede lanzarse al exterior pulverizado: Me gusta más usar esta medicina en aerosol. 3 …   Diccionario Salamanca de la Lengua Española

  • aerosol — [er′ə säl΄, er′əsôl΄] n. [ AERO + SOL3] a suspension of colloidal particles in a gas adj. 1. designating or of a small container in which gas under pressure is used to aerate and dispense a liquid spray through a valve 2. dispensed by such a… …   English World dictionary

  • aerosol — ‘Envase que contiene un gas a presión, mezclado con un líquido, que permite expulsar este pulverizado’: «Cargaron sus bolsos con aerosoles y se largaron a garabatear las paredes de Buenos Aires» (Ramos/Lejbowicz Corazones [Arg. 1991]). Con este… …   Diccionario panhispánico de dudas

  • aerosol — 1923, from AERO (Cf. aero ) air + first syllable in SOLUTION (Cf. solution). A term in physics; modern commercial application is from 1940s …   Etymology dictionary

  • aerosol — ȁerosōl m DEFINICIJA 1. ukupnost koloidno raspršenih čestica tekućih ili krutih tvari u zraku (npr. magla, dim i sl.) 2. sredstvo za dezinfekciju, pročišćavanje i osvježavanje zraka ETIMOLOGIJA aero + nlat. (hydro)sol: koloidna otopina …   Hrvatski jezični portal

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”