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breast implant

(Encyclopedia) breast implant, saline- or silicone-filled prosthesis used after mastectomy as a part of the breast reconstruction process or used cosmetically to augment small breasts. An implant…

silicone

(Encyclopedia) silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which…

plastic surgery

(Encyclopedia) plastic surgery, surgical repair of congenital or acquired deformities and the restoration of contour to improve the appearance and function of tissue defects. Development of this…

putty

(Encyclopedia) putty, commonly a mixture of whiting (calcium carbonate) and boiled linseed oil. Other substances may be combined with the oil to make putties suitable for some specific purpose. For…

Midland, cities, United States

(Encyclopedia) Midland. 1 City (1990 pop. 38,053), seat of Midland co., central Mich., in the Saginaw valley at the confluence of the Tittabawassee and Chippewa rivers; inc. 1887. Midland owes its…

Gerald Pearson Biography

inventorBorn: 31 March 1905Best Known as: co-creator of the silicon solar cell Gerald Pearson, along with Bell Labs colleagues Daryl Chapin and Calvin Fuller,…

Calvin Fuller Biography

inventorBorn: 25 May 1902Best Known as: co-creator of the silicon solar cell Chemist Calvin Fuller, along with Bell Labs colleagues Daryl Chapin and Gerald…

Daryl Chapin Biography

inventorBorn: 21 July 1906Best Known as: co-creator of the silicon solar cell Daryl Chapin with Bell Labs colleagues Calvin Fuller and Gerald Pearson developed…

The Nature of Volcanoes

Volcanoes are built by the accumulation of their own eruptive products—lava, bombs (crusted over ash flows), and tephra (airborne ash and dust). A volcano is most commonly a conical hill or mountain…