What's the difference between dust and sand?

Dust


Definition:

  • (n.) Fine, dry particles of earth or other matter, so comminuted that they may be raised and wafted by the wind; that which is crumbled too minute portions; fine powder; as, clouds of dust; bone dust.
  • (n.) A single particle of earth or other matter.
  • (n.) The earth, as the resting place of the dead.
  • (n.) The earthy remains of bodies once alive; the remains of the human body.
  • (n.) Figuratively, a worthless thing.
  • (n.) Figuratively, a low or mean condition.
  • (n.) Gold dust
  • (n.) Coined money; cash.
  • (v. t.) To free from dust; to brush, wipe, or sweep away dust from; as, to dust a table or a floor.
  • (v. t.) To sprinkle with dust.
  • (v. t.) To reduce to a fine powder; to levigate.

Example Sentences:

  • (1) The antigenic composition of an extract of rat dust, as a source of aeroallergens for rat-sensitive individuals, has been investigated and compared to the antigenic composition of rat saliva and urine.
  • (2) At the end of the dusting period those animals treated with normally charged dust had significantly more chrysotile retained in their lungs than animals exposed to discharged dust.
  • (3) Differences between mean durations of dust exposure of workers with radiographic signs of lung fibrosis and those without such signs were statistically insignificant.
  • (4) Where the guanine content was more than or equal to 0.25% in the dry dust, mite numbers were higher than 10 mites per 0.1 g dust in 43 of the 44 samples.
  • (5) The contents of hexavalent chromium, Cr(VI), in grinding dust were undetectable.
  • (6) The results of pathohistologic investigations are objectively demonstrated through a chart of morphological traits, thus facilitating the identification of the diagnostical morphological traits caused by different industrial dusts.
  • (7) A clinical investigation was made between workers exposed to dried sewage sludge dust and age matched controls not exposed.
  • (8) The median exposure of total dust was well below the Swedish threshold value, and the exposure of mould and bacteria was also low.
  • (9) Mattress dusts from the beds of 51 asthmatic children with positive skin tests to house dust mite were assayed for Der p I, Fel d I and certain viable fungi.
  • (10) According to the quantitative analysis between threshold titers of skin test and RAST titers using house dust and HD mites allergens, specific IgE production shall be decreased in the patients over 40 years old.
  • (11) Both the observance of occupational limit-values for dusts and other harmful materials at the work place, which have effects on the respiration system, and the medical survey of workers with the use of special methods for examination of respiratory system are necessary.
  • (12) Further, investigation of electrokinetic properties of these dusts by electrophoretic quasielastic light scattering is described.
  • (13) We have recently demonstrated in vitro a potential biological mechanism which could occur in vivo upon inhaling airborne graon dust, thereby constituting a potential inflammatory insult to the respiratory tracts of grain workers.
  • (14) After allowance for the fact that regression analyses suggested that the proportion of tremolite in dust was probably 2.5 times higher in Thetford Mines, Quebec, than in Charleston, the results from both matched pair and stratification analyses of tremolite fibre concentrations in lung were almost the same as for chrysotile.
  • (15) In vitro exposure of macrophages and neutrophils to inorganic dusts can enhance their oxidative metabolism, however the effects of inorganic dust inhalation on lung-inflammatory cell-oxidative metabolism remain unknown.
  • (16) Fifty asthmatics, candidates for hyposensitization with the house dust mite Dermatophagoides pteronyssinus (Dp), went through a series of allergy tests to evaluate the sensitivity of different organs to Dp.
  • (17) Specified cytotoxicity and mutagenicity of coal dust extract (mixture of solvent extractions of bituminous coal nitrosated by NaNO2) were investigated because of the association of an excess risk of gastric cancer in coal miners.
  • (18) History is littered with examples of byelection sensations that soon turned to dust.
  • (19) Inhalant allergens as mite house dust, animal danders, pollens, molds and food allergens are considered, now, to be the most sensitizing agents.
  • (20) Water from the reactors that were the source of Sonoda's drink is being used to spray trees to limit the buildup of dust and prevent fires.

Sand


Definition:

  • (n.) Fine particles of stone, esp. of siliceous stone, but not reduced to dust; comminuted stone in the form of loose grains, which are not coherent when wet.
  • (n.) A single particle of such stone.
  • (n.) The sand in the hourglass; hence, a moment or interval of time; the term or extent of one's life.
  • (n.) Tracts of land consisting of sand, like the deserts of Arabia and Africa; also, extensive tracts of sand exposed by the ebb of the tide.
  • (n.) Courage; pluck; grit.
  • (v. t.) To sprinkle or cover with sand.
  • (v. t.) To drive upon the sand.
  • (v. t.) To bury (oysters) beneath drifting sand or mud.
  • (v. t.) To mix with sand for purposes of fraud; as, to sand sugar.

Example Sentences:

  • (1) The characteristics of the iodide-induced inhibition of cyclic AMP accumulation in dog thyroid slices have been previously described [Van Sande, J., Cochaux, P. and Dumont, J. E. (1985) Mol.
  • (2) Two control trials were conducted against Ae.samoanus larvae in Pandanus, one using a sand culture of the parasitic nematode Romanomermis culicivorax and the other with temephos, an organophosphate insecticide.
  • (3) Before you take out your bucket and spade, though, you might like to look at the sand sculpture festival (until 5 September; prices vary from day to day) for inspiration.
  • (4) "And secondly, there will also be help with sand bags, which could help prevent further flooding."
  • (5) GNM announced in October that Marc Sands, the marketing director, was to leave the company .
  • (6) benj67 asks: How do you continue to justify continued your role in financing the Canadian tar sands, arguably a greater crime than the Libor scandal?
  • (7) Hansen has been an outspoken critic of tar sands, saying last year "it will be game over for the climate if development of the oil sands isn't stopped".
  • (8) Images of dead ducks in oil sands tailings pond have been plastered on billboards in Denver, Portland, Seattle and Minneapolis.
  • (9) Bacterial genera in the GAC effluents and in the GAC units themselves were similar to those found in the raw water and in the sand beds.
  • (10) He exited the sand trap sideways, was ultimately left 8ft for par but missed to the left.
  • (11) The prevalence of canine toxocariasis in pet dogs and the associated environmental contamination were studied through examination of 107 faecal and 20 sand-pits samples for Toxocara sp eggs.
  • (12) Most definitive results were obtained when seedlings were ground in the presence of sand and in a medium containing sorbitol.
  • (13) Sanding operations also were found to produce a higher proportion of respirable dust (22%) than other woodworking operations (6%-14%).
  • (14) The fertilization reaction of echinoderm eggs (Lytechinus pictus, a sea urchin, and Dendraster excentricus, a sand dollar) was followed with intracellular electrodes.
  • (15) Since its 2013 announcement, a key aim of TTIP has been to destroy regulations that prevent high-polluting tar sand crude oil from entering Europe.
  • (16) As fighter jets screamed overhead and tanks churned up the sand, it looked and sounded like the violent protests sweeping the Middle East had spread to the wealthy emirate of Abu Dhabi.
  • (17) When my floor was dirty, I rose early, and, setting all my furniture out of doors on the grass, bed and bedstead making but one budget, dashed water on the floor, and sprinkled white sand from the pond on it, and then with a broom scrubbed it clean and white... Further - and this is a stroke of his sensitive, pawky genius - he contemplates his momentarily displaced furniture and the nuance of enchanting strangeness: It was pleasant to see my whole household effects out on the grass, making a little pile like a gypsy's pack, and my three-legged table, from which I did not remove the books and pen and ink, standing amid the pines and hickories ...
  • (18) Fracking for shale gas involves digging, often as deep as a kilometre down, and pumping a mix of water, sand and chemicals into surrounding rock to fracture it and release the gas.
  • (19) Read more on Scottish independence • ' I believe in solidarity with the folk living south of Carlisle ' • ' The UK is on shifting sands – we can't assume survival ' • ' Better Together is truly scraping the barrel now ' The fact is that far from fearing the breakup of the UK, the English are looking at the benefits that devolution has brought the Scots and asking why they are not able to enjoy the same.
  • (20) The formation of three-dimensional waves and the distance travelled increased with increasing viscosity up to 4% sodium alginate and also amongst sand gains in these media.

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