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organic food
(Encyclopedia)organic food, food raised without chemicals and processed without additives. Under standards adopted by the U.S. Agriculture Dept. (USDA) in 2000 and fully effective in 2002, synthetic fertilizers and...sleep apnea
(Encyclopedia)sleep apnea, episodes of interrupted breathing during sleep. Obstructive sleep apnea is a common disorder in which relaxation of muscles in the throat repeatedly close off the airway during sleep; the...smelt
(Encyclopedia)smelt, common name for a small, slender fish of the family Osmeridae. Most species are marine, but some ascend freshwater streams to spawn and others are landlocked in lakes. The rainbow or American s...Sidoarjo mudflow
(Encyclopedia)Sidoarjo mudflow or Lusi [Lumpur Sidoarjo, Bahasa Indonesia, = Sidoarjo mud], mud volcano, Sidoarjo regency, central East Java prov., Indonesia, 20 mi (30 km) S of Surabaya. In May, 2006, a hot mu...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 are unusually sta...hydrogen
(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...horology
(Encyclopedia)horology hōrŏlˈəjē [key], science of measuring time and technology of constructing instruments for its measurement or recording. Early measurements of the passage of time were based on observatio...lutetium
(Encyclopedia)lutetium, formerly lutecium both: lo͞otēˈshēəm [key], metallic chemical element; symbol Lu; atomic number 71; at. wt. 174.9668; m.p. about 1,663℃; b.p. about 3,395℃; sp. gr. 9.835 at 25℃; v...Joliot-Curie
(Encyclopedia)Joliot-Curie ērĕnˈ [key], 1897–1956, daughter of Pierre and Marie Curie, were married in 1926. Both were assistants at the Radium Institute in Paris, of which Irène, succeeding her mother, was d...Boyle, Robert
(Encyclopedia)Boyle, Robert, 1627–91, Anglo-Irish physicist and chemist. The seventh son of the 1st earl of Cork, he was educated at Eton and on the Continent and conducted most of his researches at his own labor...Browse by Subject
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