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Topic: Dust

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	Cosmic dust - Wikipedia, the free encyclopedia
		The Earth-falling dust particles are collected in the Earth's atmosphere using plate collectors under the wings of stratospheric-flying NASA airplanes and collected from surface deposits on the large Earth ice-masses (Antartica and Greenland and Arctic) and in deep-sea sediments.
		Dust detectors in the past flew on the HEOS-2, Helios, Pioneer 10, Pioneer 11, Giotto, and Galileo space missions, on the Earth-orbiting LDEF, Eureca, and Gorid satellites, and some scientists have utilized the Voyager 1,2 spacecraft as giant Langmuir probes to directly sample the cosmic dust.
		A dust particle interacts with electromagnetic radiation in a way that depends on its cross section, the wavelength of the electromagnetic radiation, and on the nature of the grain: its refractive index, size, etc. The radiation process for an individual grain is called its emissivity, dependent on the grain's efficiency factor.
	en.wikipedia.org /wiki/Interstellar_dust (1990 words)

	Dust - Wikipedia, the free encyclopedia
		On Earth, dust occurs in the atmosphere 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 responsible for the lung disease known as Pneumoconiosis, including fl lung disease that occurs among coal miners.
		The dust which collects in houses is composed of atmospheric dust combined with dust generated by the inhabitants, mostly from sloughed skin cells.
	en.wikipedia.org /wiki/Dust (915 words)

	Sky-Harvested Dust May Unlock Mysteries of Star Formation
		Dust collected in the stratosphere by high-altitude aircraft may actually have its origin in interstellar space, and be billions of years older than the solar system itself, according to research published in this week's volume of the journal "Science
		The dust grains themselves are smaller than one-fifth the diameter of a human hair.
		The cometary particles are among the grains of cosmic dust that NASA collects during aircraft flights at altitudes near 60,000 feet (18 to 20 kilometers).
	www.space.com /scienceastronomy/astronomy/spacedust.htm (708 words)

	Dust Collection (Site not responding. Last check: 2007-10-21)
		Dust collection is an "on-line process" - for collecting any process generated dust from the source point itself on continuous basis.
		This suction hood is connected to the dust collector which sucks in air and the dust comes along with it.
		Often dust collection technology is taken lightly by the production or maintenance engineers of a manufacturing plant and they try to fabricate a simplistic collector, which, unfortunately, never works.
	www.dust-collector.biz (551 words)

	National Geographic News @ nationalgeographic.com (Site not responding. Last check: 2007-10-21)
		Dust pollution occurring near the source of an African outbreak has been known to contaminate food and drinking water, cause highway accidents, close airports, disrupt radio and satellite communications, and even suffocate cattle.
		Dust outbreaks are likely to be most harmful close to the source.
		Airborne dust is one of the suspected culprits in the range of maladies labeled “Gulf War Syndrome” resulting from the 1991 U.S.-led military campaign in Kuwait.
	news.nationalgeographic.com /news/2000/07/0710_dust.html (1190 words)

	DUST
		The composition of the dust observed on the shelves appears to vary, depending on the height of the shelf.
		The dust I observed was composed of numerous particles and textile fibers.
		In fact most of dust is made up by particles that are coarse enough to settle out in relatively short periods of time, while the material that is much finer tends to stay suspended in the air.
	www.funsci.com /fun3_en/dust/dust.htm (2871 words)

	Home Solutions: Dust : ENERGY STAR
		Dust comes from several sources and is difficult to eliminate completely.
		Increased dust could be a sign that it is time to change a dirty furnace or air conditioner filter or vacuum cleaner bag.
		Dust can also be introduced into your home through air leaks in ducts, or air infiltration through leaky doors and windows.
	www.energystar.gov /index.cfm?c=home_solutions.hm_improvement_dust (276 words)

	Characterization of the Dust/Smoke Aerosol that Settled East of the World Trade Center (WTC) in Lower Manhattan after ...
		Three bulk samples of the total settled dust and smoke were collected at weather-protected locations east of the WTC on 16 and 17 September 2001 ; these samples are representative of the generated material that settled immediately after the explosion and fire and the concurrent collapse of the two structures.
		Deposition and retention of the dust and smoke on surfaces inside homes, as well as the residuals of dust and smoke remaining if residences and building ventilation systems were not properly cleaned before rehabitation, would be available for uptake by children and adults via nondietary ingestion.
		WTC dust and smoke could lead to health impacts if the toxic constituents present on the indoor surfaces are not cleaned properly and if the HVAC system of each structure is not concurrently cleaned, or cleaned before the cleanup of the indoor surfaces and reentry into the residence or office.
	www.ehponline.org /members/2002/110p703-714lioy/lioy-full.html (8383 words)

	The MSDS HyperGlossary: Dust
		Dusts can be generated by handling, crushing, grinding, rapid impact, detonation, and breakdown of certain organic or inorganic materials, such as rocks, ore, metal, coal, wood and grains.
		Dusts can form a cloud or suspension in air, but the material tends to settle to the ground evenly rather than diffuse (migrate) throughout an area like a vapor.
		Dusts are comprised of solid particles, each of which consists of large number of atoms or molecules of a material that is not normally volatile.
	www.ilpi.com /msds/ref/dust.html (751 words)

	Hyperstition: DUST
		Spore or endo-bacterial dust is an asexual relic-swarm with unrecordable zones of migration and traversal; it condenses a virally hibernated aeon (or bacterial relic) in a series of composite membranes generally named the sarcophagus.
		On the other hand, considering that DUST (gematria= 100, 10 x 10, the double plague) or dry-GAS triggers ferocious hydrophilic tides, these arid crypts uplink Mesopotamia to Xenosignals roaming beyond the earth, connecting it to unknown hydrochemical singularities.
		Engineering a plague to consume battleview: Dust (codename: 100, Anthrax, endo-bacterial relic and the cosmodrome) is the Fog of War cumulatively engulfing warmachines, consisting of pest-crystals and multiplicative particles of all kind triggering acute spatio-tactical anomalies through War, predisposing the battlefield to border collapse.
	hyperstition.abstractdynamics.org /archives/003348.html (800 words)

	Mars Exploration: Multimedia
		Dust devils are spinning columns of wind that move across the landscape, pick up dust, and look somewhat like miniature tornadoes.
		Dust devils are a common occurrence in dry and desert landscapes on Earth, as well as Mars.
		Dust Devil Streaks in Terra Sirenum: A dust devil can be seen in action in southwestern Terra Sirenum near 63°S, 168°W, an area that has seen the activity of so many dust devils that it looks like a plate of dark gray spaghetti.
	mars.jpl.nasa.gov /gallery/duststorms/index.html (430 words)

	9-11 Research: Vast Volumes of Dust
		Both towers exploded into vast dust clouds, which photographs show to be several times the volumes of the intact buildings by the time the destruction reached the ground.
		There is a photograph of the North Tower dust showing the spire and showing dust 700 feet in front of the nearest part of the building's footprint.
		Since it is known from real-time movies that the spire fell about 30 seconds after the initiation of the collapse, and that it took about 10 seconds for the bottom of the dust cloud to reach the ground, the average speed of advance on the ground in that direction was approximately 35 feet per second.
	911research.wtc7.net /wtc/analysis/collapses/dust.html (277 words)

	Dust
		The dust that settles from the air onto desktops, beneath beds, and flows into lungs is viewed by many as nothing worse than a common annoyance.
		Dust blowing from local industries and agricultural fields has the potential to carry cancer-causing pesticides and toxic heavy metals, says ASU geologist William Stefanov.
		The toxins adhere to the soil particles and are carried on the wind along with the dust.
	healthandenergy.com /dust.htm (2149 words)

	Dust
		Indeed, until this century, dust was simply accepted as a fundamental condition of life; like darkness, it marked the boundary between the seen and the unseen.
		In the form of gold dust or pollen, as light filaments that covered the skin, or as individual particles that spun int he sunlight, dust was the most minuscule thing people encountered.
		Dust, always varied in composition, is now seen as a highly diverse particulate and a matter of sub-microscopic exactness.
	www.ucpress.edu /books/pages/8482.html (1290 words)

	Martian Dust Bowl :: Astrobiology Magazine ::
		Both rovers have been coated by some dust falling out of the atmosphere during that time, with estimates of the dust thickness ranging from 1 to 10 micrometers, or between 1/100th and 1/10th the width of a single human hair.
		The Opportunity rover appears to be collecting less dust, perhaps because of a cleaning by wind or even "scavenging" of dust by frost that forms on the rover some nights during the martian winter.
		The possibility that it has a clumping effect on the accumulated dust on solar panels is under consideration as a factor in unexpected boosts of electric output from the panels.
	www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=1422&mode=thread&order=0&thold=0 (1072 words)

	Top Story - Africa to Atlantic, Dust to Dust - January 16, 2004
		Winds blow twenty percent of dust from a Saharan storm out over the Atlantic Ocean, and twenty percent of that, or four percent of a single storm's dust, reaches all the way to the west side of the Atlantic.
		Dust may be more than just dust: researchers such as Eugene Shinn and colleagues at the United States Geological Survey (USGS) have begun preliminary studies showing that these Saharan transports can also carry to the Caribbean microscopic organisms such as a fungus known to cause a coral-reef-killing disease.
		On the other hand, the minerals in dust, such as iron, aluminum, calcium, magnesium, and potassium in the case of the Saharan dust, alter the chemical composition of the ocean it settles into to the benefit of some other species.
	www.gsfc.nasa.gov /feature/2004/0116dust.html (2562 words)

	Dust Mites
		Estimates are that dust mites may be a factor in 50 to 80 % of asthmatics, as well as in countless cases of eczema, hay fever, and other allergic ailments.
		Dust mites, due to their very small size (250 to 300 microns in length) and translucent bodies, are not visible to the unaided eye.
		One must reduce the concentrations of dust borne allergens in the living environment by controlling both allergen production and the dust which serves to transport it.
	www.dustless.com /alpha/info/mites.html (440 words)

	Mars Dust (Site not responding. Last check: 2007-10-21)
		The cloud quickly spread and by the Fourth of July was 1100 miles wide--about one-fourth the diameter of Mars itself.
		Because the martian atmosphere is thin--about 1% as dense as Earth's at sea level--only the smallest dust grains hang in the air.
		(Science@NASA) -- An enormous dust storm exploded on Mars in 2001, shrouding the planet in haze and raising the temperature of its upper atmosphere 30 deg.
	science.nasa.gov /headlines/y2003/09jul_marsdust.htm (1083 words)

	Dust
		While it is impossible to have a dust-free home, it is possible to live in a home that minimizes dust that is carried in from the outside and to avoid conditions that can promote allergens in dust.
		Because nearly two-thirds of the dust in our homes is tracked in from outdoors, one key strategy is to build and maintain homes that help occupants track off dust before it is carried inside.
		Dust is more easily removed from smooth and cleanable surfaces (smooth flooring such as wood, tile, linoleum, and vinyl) through vacuuming and mopping.
	www.afhh.org /dah/dah_dust.htm (538 words)

	CNN.com - African dust storms send germs to America - June 18, 2001
		As the dust grains and their tiny stowaways settle down in the Western Atlantic, they could pose health risks to people in Florida and the Caribbean, according to scientists with the U.S. Geological Survey and NASA.
		"Microbes in the cracks and crevasses of dust particles may be shielded from ultraviolet rays," said Dale Griffin, co-author of a report in the June 14 edition of the journal Aerobiologia, in a statement.
		Besides microbe and fungi passengers, the dust grains themselves are known to cause respiratory and allergic reactions.
	archives.cnn.com /2001/TECH/science/06/15/dust.microbes (415 words)

	SPACE.com -- Defenses Down, Galactic Dust Storm Hits Solar System
		During limited solar activity (top picture) most interstellar dust can be found above or below the Sun, while at the solar maximum (bottom picture) the dust is concentrated close to the Sun in the plane of the planets orbits.
		While no serious consequences are expected, the extra dust could slightly alter our night sky and might pose an increased risk to spacecraft, which are vulnerable to high-speed impacts from the tiny particles.
		When interstellar dust hits comets and asteroids, it's like shooting a tiny bullet at a rock, and more dust is kicked up, and the follow-on dust tends to be bigger.
	www.space.com /scienceastronomy/dust_storm_030814.html (885 words)

	APOD: 2003 July 6 - Fractal Interstellar Dust Up Close (Site not responding. Last check: 2007-10-21)
		Dust usually shows its presence by blocking out light emitted from stars or nebulae behind it, sometimes creating the illusion of a horse's head or a sombrero hat.
		Interstellar dust grains are composed mostly of carbon, silicon, and oxygen and are usually less than about 1/1000 of a millimeter across.
		Recent work indicates that most dust grains are not spherical.
	antwrp.gsfc.nasa.gov /apod/ap030706.html (158 words)

	Wired News: What a Little Moon Dust Can Do
		Lunar dust is extremely abrasive -- and unavoidable -- as astronauts quickly learned during the Apollo missions of the 1960s and '70s.
		Moon dust is much more jagged than dust on Earth because there's no water or wind on the moon to toss it around and grind down its edges.
		Also, the dust is littered with bonded shards of glass and minerals known as agglutinates, which were formed in the heat of meteorite impacts.
	www.wired.com /news/space/0,2697,67110,00.html?tw=wn_tophead_1 (888 words)

	Dust: The Basics
		The proximity of Dust to the Negative means that light sources are dimmer than you'd expect, but as you can't see far anyway, it's not like it matters.
		Dust quasielementals are about as immortal as they come, and they delight in watching things slowly crumble.
		The chant goes a dust quasielemental thinks nothing of spending several centuries on the Prime watching a rock become weathered, crack and blow away.
	mimir.net /dust/thebasics.shtml (479 words)

	Moon Dust Madness!
		Lunar dust, being a compound of silicon as is quartz, is (to our current knowledge) also not poisonous.
		The dust challenge would be especially acute during windstorms that occasionally envelop Mars from poles to equator.
		Examples include alkaline dust blown from dry lakes in North American deserts, wood dust from sawmills and logging operations, and, of course, abrasive quartz dust in mines.
	www.firstscience.com /site/articles/moondust.asp (776 words)

	HON Allergy Glossary Dust
		House dust contains mites (which are the primary cause of dust-related allergies), microscopic particles of animal dander, pollen, mould, fibers from clothing and other fabrics and detergents.
		Dust mites, the primary cause of dust allergy, are microscopic organisms found in homes.
		It is actually the excrement of these mites to which people are allergic, thus dust mites can cause allergic reactions even when dead.
	www.hon.ch /Library/Theme/Allergy/Glossary/dust.html (64 words)

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