silicate-based cement
41Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
42silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… …
43Glass — This article is about the material. For other uses, see Glass (disambiguation). Moldavite, a natural glass formed by meteorite impact, from Besednice, Bohemia …
44Copper extraction techniques — This article is about historical production methods. For modern methods, see Flash smelting. The Chino open pit copper mine in New Mexico …
45Dental restoration — Intervention ICD 9 CM 23.2 23.4 A dental restoration or dental filling is a dental restorative ma …
46Carbon sequestration — is the capture of carbon dioxide (CO2) and may refer specifically to: The process of removing carbon from the atmosphere and depositing it in a reservoir. [1] When carried out deliberately, this may also be referred to as carbon dioxide removal,… …
47moon — mooner, n. moonless, adj. /moohn/, n. 1. the earth s natural satellite, orbiting the earth at a mean distance of 238,857 miles (384,393 km) and having a diameter of 2160 miles (3476 km). 2. this body during a particular lunar month, or during a… …
48Moon — /moohn/, n. Sun Myung /sun myung/, born 1920, Korean religious leader: founder of the Unification Church. * * * Sole natural satellite of Earth, which it orbits from west to east at a mean distance of about 238,900 mi (384,400 km). It is less… …
49Liberia — Liberian, adj., n. /luy bear ee euh/, n. a republic in W Africa: founded by freed American slaves 1822. 2,602,068; ab. 43,000 sq. mi. (111,000 sq. km). Cap.: Monrovia. * * * Liberia Introduction Liberia Background: Seven years of civil strife… …
50Vermiculite — Infobox mineral name = Vermiculite category = boxwidth = boxbgcolor = caption = formula = (MgFe,Al)3(Al,Si)4O10(OH)2·4H2O color = Bronze Yellow habit = Clay, scaly, aggregate system = Monoclinic twinning = cleavage = Perfect fracture = Uneven… …
