(from the article "motion picture") Several different ratios of frame width to frame height, called "aspect ratios," have been used in motion pictures. The most common, known as the Academy ratio, is 1.33 to 1, or 4 to 3, a ratio corresponding to the dimensions ...
museum of art in Florence chiefly famous for its several sculptures by Michelangelo, notably his "David." It also has a collection of 15th- and 16th-century paintings and many 13th-16th-century Tuscan paintings. It was founded in 1784 by the grand duke ...
North American Atlantic seaboard possessions of France in the 17th and 18th centuries. Centred in what are now New Brunswick, Nova Scotia, and Prince Edward Island, Acadia was probably intended to include parts of Maine (U.S.) and Quebec. [3 Related Articles]
national park on the Atlantic coast of Maine, U.S., astride Frenchman Bay. It has an area of 65 square miles (168 square km) and was originally established as Sieur de Monts National Monument (1916), named for Pierre du Guast, sieur ... [2 Related Articles]
(from the article "Louisiana") ...Parishes. Each area of settlement preserved a cultural heritage strongly marked by adherence to either Roman Catholic or Protestant faith. The Louisiana French, particularly the descendants of the Acadians (most of whom were French settlers deported by the British from ...
a mountain-building event that affected an area from present-day New York to Newfoundland during the Devonian Period (416 to 359.2 million years ago). Originally a depositional fore-arc basin formed from what was formerly known as the Appalachian Geosyncline; subsequent compressional ... [1 Related Articles]
(from the article "Saint Lawrence, Gulf of") ...channels occupy approximately one-quarter of the total area of the gulf. Then there are the submarine platforms, often less than 165 feet (50 m) in depth, of which the most important, known as the Acadian Platform, occupies a large semicircle ...
Pacific seaport, southwestern El Salvador. Spanish conquistadores defeated the Indians there in 1524, and it subsequently flourished as a colonial port. The old town has been rebuilt inland in order to make room for new port facilities. Acajutla is El ...
(from the article "bhumi") ...("hard to conquer"), (6) abhimukhi ("turning toward" both transmigration and nirvana), (7) durangama ("far-going"), (8) acala ("immovable"), (9) sadhumati ("good-minded"), and (10) dharmamegha (showered with "clouds of dharma," or universal...
(from the article "copperleaf") ...plant, or red hot cattail (A. hispida), reaches a height of 3 m and is grown for its long, taillike, pendent flower spikes, rust red in colour. It is native to tropical eastern Asia. A. godseffiana, which has green and ...
(from the article "smallpox") In 2007 the Food and Drug Administration in the United States approved a new smallpox vaccine, the only new vaccine for smallpox to be approved since 1931. The new vaccine, called ACAM2000, is produced using basic cell-culture techniques that allow ...
(from the article "Soli") ancient Greek city on Cyprus, located west of modern Karavostasi on Morphou Bay. Soli traditionally was founded after the Trojan War by the Attic hero Acamas, perhaps reflecting the Sea Peoples' occupation of Cyprus (c. 1193 BC). According to another ...
city, southeastern Guanajuato estado (state), central Mexico. Acambaro lies along the Lerma River, on the Mexican Plateau, at 6,388 feet (1,947 m) above sea level. A Spanish settlement was founded there in 1526 on the site of ...
(from the article "alcoholism") Most recently, naltrexone (an opiate antagonist) and acamprosate, or calcium acetylhomotaurinate (a modulator of gamma-aminobutyric acid [GABA] and N-methyl-D-aspartate [NMDA] receptors), have, like disulfiram, been effective in reducing relapse over periods up to a year. But there is no evidence ...
one of 23 families in the mint order of flowering plants (Lamiales), containing approximately 230 genera and nearly 3,500 species distributed predominantly in tropical and subtropical regions of the world. The greater part of the Acanthaceae family are herbs or ... [1 Related Articles]
(from the article "marine ecosystem") ...phytoplankton. While many dinoflagellates carry out photosynthesis, some also consume bacteria or algae. Other important groups of protists include flagellates, foraminiferans, radiolarians, acantharians, and ciliates (Figure 3). Many of these protists are important consumers and a food source for zooplankton.
(from the article "spiny-headed worm") ...in the arthropod gut, the larva, called an acanthor, bores through the gut wall into the arthropod's blood cavity (hemocoel), becomes encapsulated there, and develops into a new stage called an acanthella. The acanthella, a miniature version of the adult, ...
a silver sulfide mineral (Ag2S) that is the most important ore of silver. It is abundant, with other silver minerals, in the sulfide mineral deposits of Kongsberg, Nor.; Kremnica, Slovakia; Zacatecas, Mex.; and the Comstock Lode, Nev., U.S.
(from the article "annelid") Primitive group; setae present on 5 anterior segments; no anterior sucker; parasitic on fish in Lake Baikal (U.S.S.R.); size, small; genera include Acanthobdella.An eversible pharynx used to penetrate host tissue; jawless; distinct blood vessels contain...
(from the article "annelid") ...also modified to form sucker; body with 14 to 15 segments; all species parasitic or commensal on freshwater crayfish; size, minute; Stephanodrilus.Primitive group; setae present on 5 anterior segments; no anterior sucker; parasitic on fish in Lake Baikal (U.S.S.R.); ...
(from the article "filariasis") ...eyeball). Loiasis produces irritation but seldom permanent damage. Treatment includes surgical removal of the worms from the conjunctiva and drug therapy. Other forms of filariasis are caused by Acanthocheilonema perstans and Mansonella ozzardi and are not in most cases associated ...
(from the article "spiny shark") Among the genera of spiny sharks most useful for fossil dating is Acanthodes, of the order Acanthodiformes, which attained worldwide distribution. Species of Acanthodes grew to be about 30 centimetres (about 12 inches) long and in many respects represent a ...
(from the article "Hauterivian Stage") ...the thick Hils clay, whereas in Britain it includes the middle part of the Wealden sandstones and clays. The base of the stage is defined by the first appearance of the ammonite Acanthodiscus radiatus and related species, ...
(from the article "spiny-headed worm") ...host. No further development occurs until the shelled embryos are eaten by an arthropod, which serves as a necessary intermediate host. After its release in the arthropod gut, the larva, called an acanthor, bores through the gut wall into the ...
(from the article "community ecology") By the Late Devonian the earliest tetrapods had appeared. Forms such as Ichthyostega and Acanthostega (both from eastern Greenland) are the best-known. Aptly described as fish with legs, they are classified as labyrinthodont amphibians, ...
in architecture and decorative arts, a stylized ornamental motif based on a characteristic Mediterranean plant with jagged leaves, Acanthus spinosus. It was first used by the Greeks in the 5th century BC on temple roof ornaments, on ... [1 Related Articles]
(from the article "acanthus") in architecture and decorative arts, a stylized ornamental motif based on a characteristic Mediterranean plant with jagged leaves, Acanthus spinosus. It was first used by the Greeks in the 5th century BC on temple roof ornaments, on ...
(from the article "Latin America, history of") ...organizations were frankly influenced by European fascism, but in most countries their membership was numerically insignificant. The chief exception was Brazil, whose green-shirted Integralistas (Acao Integralista Brasileira) emerged as the largest single national party in the mid-1930s until involvement in ...
city and port, Guerrero estado (state), southwestern Mexico. Situated on a deep, semicircular bay, Acapulco is a resort with the best harbour on the Pacific coast of Mexico and one of the finest natural anchorages in the ... [1 Related Articles]
low range on the border of Brazil (Para state) and southern Guyana. The mountains, which rise to about 2,000 feet (600 metres) above sea level, run in an east-west direction for about 80 miles (130 km) and form part of ... [1 Related Articles]
(from the article "beekeeping") Acarine disease is caused by the mite Acarapis woodi that gets into the tracheae of the bee through its breathing holes or spiracles in its thorax or midsection. Bees affected by this mite are unable to fly, have disjointed wings ...
(from the article "Paraguay") Paraguay's most important natural resource is its hydroelectric potential. Most electricity in Paraguay came from wood- and oil-burning thermoelectric plants in Asuncion until the Acaray hydroelectric power plant began operating in 1968. When the plant's capacity was expanded, Paraguay's total ...
stream in southwestern Peru, rising in the Cordillera Occidental and flowing to the Pacific Ocean; its valley is the site of remains of the Nazca culture. [1 Related Articles]
(from the article "arachnid") ...in some fully engorged ticks; body segments fused; mouthparts adapted to piercing, sucking, biting, grating, or sawing; many parasitic and economically important.30,000 species. Eyes present or absent; habitats from aquatic to terrestrial; predatory to...
city, northern Portuguesa estado (state), northwestern Venezuela. Formerly the state capital, Acarigua is a principal commercial centre of the northern portion of the Llanos (plains), in which cattle, sugarcane, cotton, corn (maize), and rice are the principal products. Industries in ...
(from the article "beekeeping") Acarine disease is caused by the mite Acarapis woodi that gets into the tracheae of the bee through its breathing holes or spiracles in its thorax or midsection. Bees affected by this mite are unable to fly, have disjointed wings ...
district of ancient Greece bounded by the Ionian Sea, the Ambracian Gulf, Mount Thyamus, and the Achelous River. Corinth founded several colonies on the coast of Acarnania in the 7th and 6th centuries BC. Originally a tribal unit, Acarnania developed ...
(from the article "fungus") ...lichens; thick ascal apex with narrow canal; includes subclasses Acarosporomycetidae, Lecanoromycetidae, and Ostropomycetidae; contains 10 orders.Forms lichens; asci unitunicate and lecanoralean (resembling asci of the genus Lecanora), with nonamyloid or slightly amyloid inner ascus apex (tholus);...
(from the article "Indian philosophy") The main religious inspirations are from the theistic tradition of the Alvar poet-saints and their commentators known as the Acaryas, who sought to combine knowledge with action (karma) as the right means to liberation. There is also, besides the Vedic ...
rare hereditary metabolic disorder caused by lack of the organic catalyst or enzyme called catalase. Although a deficiency of catalase activity is noted in many tissues of the body, including the red blood cells, bone marrow, liver, and skin, only ...
(from the article "catalexis and acatalexis") in prosody, an omission or incompleteness in the last foot of a line or other unit in metrical verse and, conversely, the metrical completeness of such a unit.
(from the article "Venice") ...Bridge, designed by the aptly named Antonio da Ponte (c. 1590). The other two bridges are of more recent origin: the Scalzi Bridge, at the railway station, was built of marble in 1932, and the Accademia Bridge, a high-arched wooden ...
(from the article "Ricca, Paul") Chicago gangster who was considered "the brains" behind the operations of Al Capone and Capone's successors, Frank Nitti and Tony Accardo. He was the Chicago representative in the formation of the national crime syndicate in 1934, led by Lucky Luciano, ...
(from the article "income tax") ...corporate income tax on investment can be lessened by accelerating the rate at which the cost of new machinery and buildings is written off against taxable income through depreciation allowances. Accelerated depreciation may take the form of an additional deduction ...
(from the article "soil") ...of soil profiles. These processes become soil conservation issues when the rate of erosion greatly exceeds the rate expected in the absence of human land use-a situation referred to as accelerated erosion. Rates of normal soil erosion have been estimated ...
(from the article "supercomputer") ...the Comprehensive Test Ban Treaty by the United States in 1996, the need for an alternative certification program for the country's aging nuclear stockpile led the Department of Energy to fund the Accelerated Strategic Computing Initiative (ASCI). The goal of ...
(from the article "electron tube") ...in the electron beam and focuses the beam. The voltage between the cathode and the cavity resonators (the buncher and the catcher, which serve as reservoirs of electromagnetic oscillations) is the accelerating potential and is commonly referred to as the ...
(from the article "particle accelerator") ...at the centre of an evacuated chamber that has the shape of a short cylinder, like a pillbox, between the poles of an electromagnet that creates a uniform field perpendicular to the flat faces. The accelerating voltage is applied by ...
rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. Motion on a circle is accelerated even ... [25 Related Articles]
physiological changes that occur in the human body in motion as a result of rapid increase of speed. Rapid acceleration and surges in acceleration are felt more critically than are gradual shifts. Pilots are especially subject to the effects of ...
