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Encyclopedia > Dust
Look up dust in Wiktionary, the free dictionary.
Three years of solid usage has blocked this laptop heat sink with dust, making the computer unusable
Three years of solid usage has blocked this laptop heat sink with dust, making the computer unusable

Dust is a general name for minute solid particles with diameters less than 500 micrometers. 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. In addition, if enough of the minute particles are dispersed within the air in a given area (such as flour or coal dust), under certain circumstances this can be an explosion hazard. Image File history File links Broom_icon. ... Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 151 languages. ... // Look up dust in Wiktionary, the free dictionary. ... Image File history File links Download high resolution version (2986x1114, 483 KB) The dust on the laptop CPU heat sink after three years of explotation have make the laptop unusable due frequent thermal shutdowns. ... Image File history File links Download high resolution version (2986x1114, 483 KB) The dust on the laptop CPU heat sink after three years of explotation have make the laptop unusable due frequent thermal shutdowns. ... For the band, see Laptop (band). ... This article is about the substance or device. ... This box:      For other uses, see Solid (disambiguation). ... DIAMETER is a computer networking protocol for AAA (Authentication, Authorization and Accounting). ... A micrometre (American spelling: micrometer, symbol µm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the diameter of a droplet of mist or fog. ... This article is about Earth as a planet. ... Air redirects here. ... Loess field in Germany Surface-water-gley developed in glacial till, Northern Ireland For the American hard rock band, see SOiL. For the System of a Down song, see Soil (song). ... For other uses, see Wind (disambiguation). ... This article is about volcanoes in geology. ... Air pollution Pollution is the introduction of pollutants (whether chemical substances, or energy such as noise, heat, or light) into the environment to such a point that its effects become harmful to human health, other living organisms, or the environment. ... Particulates, alternatively referred to as particulate matter (PM), aerosols or fine particles, are tiny particles of solid or liquid suspended in a gas. ... The generalised concept of radiative forcing in climate science is any change in the radiation (heat) entering the climate system or changes in radiatively active gases. ...


Coal dust is responsible for the lung disease known as Pneumoconiosis, including black lung disease, which occurs among coal miners. This danger has resulted in a number of laws regulating environmental standards for working conditions. Coal dust is a fine powdered form of coal. ... Human respiratory system The lungs flank the heart and great vessels in the chest cavity. ... Pneumoconiosis, also known as coal workers pneumoconiosis, miners asthma, or black lung disease, is a lung condition caused by the inhalation of dust, characterized by formation of nodular fibrotic changes in lungs. ... Black lung disease, also known as coal workers pneumoconiosis (CWP), is caused by long exposure to coal dust. ... Coal Example chemical structure of coal Coal is a fossil fuel formed in ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. ...

Contents

Domestic dust

Dust in homes, offices, and other human environments is mainly generated by humans from their skin cells that slough off[dubious ]: For other uses, see Skin (disambiguation). ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell being used to describe the smallest unit of a living organism Cells in culture, stained for keratin (red) and DNA (green) The cell is the...

An average skin flake has an equivalent diameter of 14µm. It is estimated that the entire outer layer of skin is shed every day or two at a rate of 7 million skin flakes per minute. Tests of indoor environmental dust in homes and offices have shown it to be primarily (70-90%) composed of skin flakes. Assuming a density of 1 g/cm³, 7 million skin flakes per minute corresponds to a mass emission rate of about 20 mg/minute.[1]

Some comes from domesticated pets such as dogs, cats and birds. Some atmospheric dust from the outdoors is also present.[2] On average, approximately 6 mg/m³/day of house dust is formed in private households, depending primarily on the amount of time spent at home.[3] "Dust bunnies" are little clumps of fluff that form when sufficient dust accumulates. Dust is known to worsen hayfever. Look up dust bunny in Wiktionary, the free dictionary. ...


Insects and other small fauna found in houses have their own subtle interactions with dust that may have adverse impact on the health of its regular occupants. Thus, in many climates it is wise to keep a modicum of airflow going through a house, by keeping doors and windows open or at least slightly ajar. In colder climates, it is essential to manage dust and airflow, since the climate encourages occupants to seal even the smallest air gaps, and thus eliminate any possibility of fresh air entering. This article is about modern humans. ...


House dust mites are on all surfaces and even suspended in air. Dust mites feed on minute particles of organic matter, the main constituent of house dust. They excrete enzymes to digest dust particles; these enzymes and their feces, in turn, become part of house dust and can provoke allergic reactions in humans. Dust mites flourish in the fibers of bedding, furniture, and carpets. Binomial name Trouessart, 1897 The house dust mite (sometimes abbreviated by allergists to HDM), is a cosmopolitan guest in human habitation. ...


The particles that make up house dust can easily become airborne, so care must be exercised when removing dust, as the activity intended to sanitize or remove dust may make it airborne. One way to repel dust is with some kind of electrical charge, but house dust can be removed by many methods, including wiping, swiping, or sweeping by hand, or with a dust cloth, sponge, feather duster, or broom, or by suction by a vacuum cleaner or air filter. The device being used traps the dust; however, some may become airborne and come to settle in the cleaner's lungs, thus making the activity somewhat hazardous. A feather duster dusting a table. ... Regular canister vacuum cleaner for home use. ... Air filter in an Opel Astra car, top side=clean side Air filter in an Opel Astra car, bottom side=dust side Automotive air filter clogged with dust and debris. ...


Dust Control

Dust control is the suppression of solid particles with diameters less than 500 micrometers. Because dust in the air is a serious health threat, especially to children, older people, and those with respiratory illnesses, the U. S. Environment Protection Agency (EPA) mandates facilities that generate dust must work to minimize it in their operations.


The most frequent dust control violations occurred at new residential housing developments in urban areas. Federal law requires permits for earth moving at construction sites, include plans to control dust emissions. Control measures include such simple practices as watering down construction and demolition sites, as well as preventing dust from being tracked out onto adjacent roads. In addition, federal laws require dust controls on sources such as vacant lots, unpaved parking lots, and unpaved roads. Control measures for these sources include paving, gravel, or stabilizing the surface with water or other dust suppressants.


Dust in outer space

Cosmic dust is widely present in space, where gas and dust clouds are primary precursors for planetary systems. The zodiacal light, seen in the sky on a dark night, is produced by sunlight reflected from particles of dust in orbit around the Sun. The tails of comets are produced by emissions of dust and ionized gas from the body of the comet. Dust also covers solid planetary bodies, and vast dust storms can occur on Mars that can cover almost the entire planet. Interstellar dust is found between the stars, and high concentrations can produce diffuse nebulae and reflection nebulae. “Space dust” redirects here. ... For other uses, see Gas (disambiguation). ... A planetary system consists of at least one star and various orbiting objects (such as asteroids, comets, moons, and planets). ... The zodiacal light in the eastern sky before the beginning of morning twilight. ... Sol redirects here. ... Comet Hale-Bopp Comet West For other uses, see Comet (disambiguation). ... “Sandstorm” redirects here. ... Mars is the fourth planet from the Sun in the solar system, named after the Roman god of war (the counterpart of the Greek Ares), on account of its blood red color as viewed in the night sky. ... Interstellar cloud is the generic name given to accumulations of gas and dust in our galaxy. ... Wikipedia does not yet have an article with this exact name. ... Wikipedia does not yet have an article with this exact name. ...


Dust samples returned from outer space could provide information about conditions in the early solar system. Several spacecraft have been launched in an attempt to gather samples of dust and other materials. Among these was Stardust, which flew past Comet Wild 2 in 2004 and returned a capsule of the comet's remains to Earth in January 2006. The Japanese Hayabusa spacecraft is currently on a mission to collect samples of dust from the surface of an asteroid. This article is about the Solar System. ... The Space Shuttle Discovery as seen from the International Space Station. ... An artists rendering of Stardust (NASA image) The Stardust capsule with cometary and interstellar samples landed at the U.S. Air Force Utah Test and Training Range at 10:10 UTC (15 January 2006) in the Bonneville Salt Flats. ... An enhanced image of Comet 81P/Wild, from the Stardust spacecraft, showing surface detail and plumes of gas. ... For other uses, see Hayabusa (disambiguation). ... For other uses, see Asteroid (disambiguation). ...


Dust in fiction

  • In JM Barrie's children's novel Peter Pan (1911), "pixie dust" is a substance used to help make people who can't already, fly.
  • In Clark Ashton Smith's short horror story "The Treader In The Dust" (1935) [2], a scholar unwittingly calls forth a demon that personifies dustiness.
  • In the Peanuts comic strip, the character Pig-Pen (1954) is constantly surrounded by a cloud of dust.
  • In Arthur C. Clarke's A Fall of Moondust (1961), 21st century tourists "cruise" across the Moon's "Seas" that have filled over eons with very fine dust, which is so fine that it almost behaves like water.
  • In Hal Clement's short science fiction story "Dust Rag" (1965), two astronauts struggle with dust that stuck to their helmets, blinding them.
  • In Philip Pullman's best-selling series His Dark Materials (1995), dust (or "Dust", as it is spelled in the books) plays an important part by creating a connection between different worlds and is drawn to conscious beings.
  • In the TV comedy Little Britain (2003), Fat Fighters group leader Marjorie Dawes distinctively instructs the dieters to eat dust as it is "low in fat."
  • In "The Dust Has Landed", an episode of Graham Duff's science-fiction radio comedy Nebulous, sentient dust declares war against humanity, forcing the reinvention of the vacuum cleaner.
  • In Arthur Slade's Dust (2001), a stranger comes to the small town of Horshoe, promising rain. Children begin to disappear. Young adult fiction.
  • In the science fiction series Babylon 5, Dust was a psychoactive illegal drug that enhanced latent telepathic abilities in non-humanoids, that often led to fatalities in both the user and "victim".
  • In Buffy the Vampire Slayer, the characters refer to slaying a vampire as "dusting."

Sir James Matthew Barrie, Baronet, Scottish author Sir James Matthew Barrie, Baronet (May 9, 1860 - June 19, 1937), more commonly known as J. M. Barrie, was a Scottish novelist and dramatist. ... This article is about the play by J.M. Barrie. ... Pixie dust is the trail of sparkling material that often follows mythical creatures such as pixies and fairies in general when they are visually represented. ... Clark Ashton Smith (January 13, 1893-August 14, 1961) was a poet, sculptor, painter and author of fantasy, horror and science fiction short stories. ... “Horror story” redirects here. ... For other uses, see Peanut (disambiguation). ... This page is about the Peanuts character; for the Grateful Dead member see Ron Pigpen McKernan. ... Sir Arthur Charles Clarke, CBE, Sri Lankabhimanya (16 December 1917 – 19 March 2008) was a British (lived in Sri Lanka since 1956) science fiction author, inventor, and futurist, most famous for the novel 2001: A Space Odyssey, written in collaboration with director Stanley Kubrick, a collaboration which led also to... A Fall of Moondust is a science fiction novel by Arthur C. Clarke, first published in 1961. ... Harry Clement Stubbs (May 30, 1922 - October 29, 2003), better known by the pen name Hal Clement, was an American science fiction writer, a leader of the subgenre hard science fiction. ... Science fiction is a form of speculative fiction principally dealing with the impact of imagined science and technology, or both, upon society and persons as individuals. ... Philip Pullman CBE (born October 19, 1946) is a British writer. ... The trilogy (U.K versions), in order of succession from left to right. ... Spoiler warning: Dust in Philip Pullmans trilogy of novels His Dark Materials is a fictional form of dark matter (as we call it in our world), an elementary particle that is of fundamental importance to the novels. ... A comedy is a dramatic performance of a light and amusing character, usually with a happy conclusion to its plot. ... This article is about the British TV show Little Britain. ... The following characters appear in the BBC TV and radio show Little Britain. ... Nebulous is a British comedy-sci-fi broadcast on BBC Radio 4 in 2005 and 2006. ... Graham Duff is a British writer and producer. ... Nebulous is a science fiction comedy that premiered on BBC Radio 4 and is produced independently by Baby Cow Productions. ... Not to be confused with sapience. ... Regular canister vacuum cleaner for home use. ... Arthur Gregory Slade (born July 9, 1967 in Moose Jaw, Saskatchewan, Canada), is a Canadian author. ... Babylon 5 is an epic American science fiction television series created, produced, and largely written by J. Michael Straczynski. ... For other uses, see Buffy the Vampire Slayer (disambiguation). ...

Dust in religion

In ancient Sumerian mythology:

  • The afterlife consists of the dreary "House of Dust and Darkness".

In the Bible: For other uses, see Bible (disambiguation). ...

  • In Genesis 3:19, God — following The Fall, Adam and Eve's transgression — states to the couple:
By the sweat of your brow you will eat your food until you return to the ground, since from it you were taken; for dust you are and to dust you will return. [Emphasis added]

This latter clause is used in the Ash Wednesday service in some churches for the administering of ashes, and is adapted in funeral services to the common prayer "Dust to Dust". For other uses, see Genesis (disambiguation). ... Adam, Eve, and a female serpent (possibly Lilith) at the entrance to Notre Dame de Paris In Abrahamic religion, the Fall of Man, the Story of the Fall, or simply, the Fall, refers to mans transition from a state of innocence to a state of knowing only dualities such... In the Western Christian calendar, Ash Wednesday is the first day of Lent. ... Dust to Dust may refer to: an album by Pete Nice & DJ Daddy Rich; see Dust to Dust (album). ...

I will make your offspring like the dust of the earth, so that if anyone could count the dust, then your offspring could be counted.

Note however that in both of these Biblical passages, the Hebrew word is עפר (`âfâr), which can also mean earth or dirt. For other uses, see Genesis (disambiguation). ... Abram is a village in the Metropolitan Borough of Wigan, Greater Manchester, England. ... Loess field in Germany Surface-water-gley developed in glacial till, Northern Ireland For the American hard rock band, see SOiL. For the System of a Down song, see Soil (song). ...

  • Micah 7:17, "They shall lick dust like a serpent..."
  • John 8:1-11 features Jesus "writing on the ground." Many translators substitute "dust" for "ground". This scripture provides the only witness of any writing by Jesus. The choice of dust as a medium for writing has created speculation as to what Jesus wrote.

See also

  • Contamination control

References

  • Holmes, Hannah; (2001)The Secret Life of Dust. Wiley. ISBN 0-471-37743-0
  • Steedman, Carolyn; (2002) Dust. Manchester University Press. ISBN-13: 978-0719060151
  1. ^ Heinsohn, R., Cimbala, J., (2003) Indoor Air Quality Engineering: Environmental Health and Control of Indoor Pollutants. page 146. CRC Press.
  2. ^ [1]
  3. ^ House dust formation rate (in German)

External links


  Results from FactBites:
 
Cosmic dust - Wikipedia, the free encyclopedia (1990 words)
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.
Dust - Wikipedia, the free encyclopedia (915 words)
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.
  More results at FactBites »

 
 

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