Item details: smaple of house dust

smaple of house dust dust (see definution) http://en.wikipedia.org/wiki/Dust From Wikipedia, the free encyclopedia. Dust is a general name for minute solid particles of diameters less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. On Earth, dust occurs in the atmoxphere from various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer space (see interstellar dust and Zodiacal light), where gas and dust clouds are primary precursors for planetary systems. The physical behaviour of dust follows laws that are not always comparable with that of solid or fluid matter. For example the pressure on a box full of dust need not be uniform (See physics of granulate matter for explanation). [edit] House dust The dust which collects in houses is composed of atmospheric dust combined with dust generated by the inhabitants, mostly from sloughed skin cells and fibers from clothing and coverings. It is removed with a broom, dusting cloth, or vacuum cleaner. House dust mites feed on the organic components of house dust. Their faeces in turn become part of house dust and can provoke allergic reactions in humans. [edit] See also dust storm Serial number: UKMOCAT0000153B Contributed by: geoff cox Submitted: Last modified: Mon Jan 8 12:12:57 2007

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UKMO also see: http://dump.ordure.org/www.ordure.org/291/dust.html   Paul Conneally sandstorm a tank meets a horse and cart on the road to Basra The above is the hokku from the kasen renku 'The Road To Basra' led by William J Higginson - sand of course is generally slightly bigger in terms of particle size than dust... http://renku.home.att.net/kasen/Basra_Info.html   Have something to say about this submission? Fill in the form below Your name Your comments

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