toxic fine particles
51Georg Agricola — Infobox Scientist name = Georgius Agricola box width = image width =200px caption = Georgius Agricola birth date = March 24, 1494 birth place = Glauchau death date = November 21, 1555 death place = residence = citizenship = German nationality =… …
52Cigarette filter — Filters in a new and used cigarette A cigarette filter has the purpose of reducing the amount of smoke, tar, and fine particles inhaled during the combustion of a cigarette. Filters also reduce the harshness of the smoke and keep tobacco flakes… …
53Earthen plaster — is a blend of clay, fine aggregate, and fiber. Other common additives include pigments, lime, casein, animal dung, and linseed oil. Earthen plaster is usually applied to masonry, cob, or straw bale interiors or exteriors as a wall finish. It… …
54Gallium(III) arsenide — Chembox new Name = Gallium arsenide ImageFile = Gallium arsenide.jpg ImageFile1 = Gallium arsenide unit cell 3D balls.png IUPACName = Gallium arsenide Section1 = Chembox Identifiers CASNo = 1303 00 0 SMILES = Ga#As Section2 = Chembox Properties… …
55Powdered milk — is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer shelf life than liquid milk and does not need to be refrigerated, due to its low moisture content.… …
56environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
57soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …
58Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
59environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
60drug — drug1 /drug/, n., v., drugged, drugging. n. 1. Pharm. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well being. 2. (in federal law) a. any substance… …
