(from the article "Western architecture") The ecclesiastical architecture of the East is more varied, partly as a result of differences in the liturgies. The monastery of St. John the Baptist of Studium in Constantinople (463) ...
one of the longest rivers in Greece, rising in the Pindus Mountains of central Epirus (Ipiros) and dividing Aetolia from Acarnania. It debouches into the Ionian Sea after a course ...
(from the article "Bavarian Alps") ...to the north its gentle slopes allow the grazing of cattle. The mountains hold lignite mines and petroleum deposits and are crossed at Scharnitz Pass (3,133 feet [955 m]) by ...
landscape painter, a pioneer of the German realist school. He studied at the Dusseldorf academy under Johann Wilhelm Schirmer, but emancipated himself from the contemporary school of landscapists that delighted ...
landscape painter of the Dusseldorf school who is distinguished for his colourful renderings of the Bay of Naples, of Rome, and of Venice. He broke away from the traditional classicist ...
dry, one-seeded fruit lacking special seams that split to release the seed. The seed coat is attached to the thin, dry ovary wall (husk) by a short stalk, so that ... [5 Related Articles]
former city, central Heilongjiang sheng (province), far northeastern China. In 2006 it was incorporated into the city of Harbin, and it became a southeastern district of that ...
river in Thesprotia in Epirus, Greece, that was thought in ancient times to go to Hades because it flowed through dark gorges and went underground in several places; an oracle ...
(from the article "canon law") ...code. About 800 the Hadriana and the Hispana were developed into a systematic whole, the Dacheriana (canonical collection named for its 17th-century publisher, French scholar Jean-Luc d'Achery)-the principal source of ...
(from the article "refractory") Silicon carbide (SiC) ceramics are made by a process referred to as reaction bonding, invented by the American Edward G. Acheson in 1891. In the Acheson process, pure silica sand ...
U.S. secretary of state (1949-53) and adviser to four presidents, who became the principal creator of U.S. foreign policy in the Cold War period following World War II; he helped ... [4 Related Articles]
American publisher and philanthropist who, with her husband, DeWitt Wallace, created and published Reader's Digest, one of the most widely circulated magazines in the world. [2 Related Articles]
(from the article "international relations") ...press, Congress, and the military against any giveaway of atomic secrets, Byrnes appointed a committee in January 1946 to draft proposals for international control of atomic energy. The resulting (Dean) ...
first standardized tradition of toolmaking of Homo erectus and early Homo sapiens. Named for the type site, Saint-Acheul, in Somme departement, in northern France, Acheulean tools were made of stone ... [16 Related Articles]
(from the article "heraldry") The term achievement, properly armorial achievement, means the whole display showing shield, helmet, crest, mantling, wreath, and, if appropriate, additaments such as a motto and supporters. In addition, an achievement ...
(from the article "motivation") Achievement was initially recognized as an important source of human motivation by the American psychologist Henry Murray in the late 1930s. Although Murray identified achievement motivation as important to the ...
(from the article "psychological testing") ...distant future behaviour (e.g., success in school), such a device is called an aptitude test. When used to evaluate the individual's present academic or vocational skill, it may be called ...
mountainous island off the west coast of Ireland. It is part of County Mayo, joined to the mainland by a bridge across Achill Sound. The island is Ireland's largest, with ...
(from the article "Arsinoe IV") ...landing in Alexandria in 48, Caesar captured the members of the Ptolemaic royal family, but Arsinoe managed to escape with the aid of Ganymedes, her mentor, and joined the Egyptian ...
in Greek mythology, son of the mortal Peleus, king of the Myrmidons, and the Nereid, or sea nymph, Thetis. He was the bravest, handsomest, and greatest warrior of the army ... [12 Related Articles]
(from the article "Troilus and Cressida") ...of Sparta but now the mistress of the Trojan prince Paris. Their one scene together presents Helen and Paris as vapid and self-centred. Other figures fare no less well. The ...
(from the article "Wolf, Max") ...to use the stereocomparator (a type of stereoscopic viewer), which greatly helps in the discovery and identification of variable or moving objects in celestial photographs. In 1906 he discovered Achilles, ...
Athenian vase painter known by and named for an amphora attributed to him with a painting of "Achilles and Briseis." The amphora is now in the Vatican Museums. His period ...
in logic, an argument attributed to the 5th-century BC Greek philosopher Zeno, and one of his four paradoxes described by Aristotle in the treatise Physics. The paradox concerns a race ... [5 Related Articles]
author of Leucippe and Cleitophon, one of the Greek prose romances that influenced the development of the novel centuries later. Nothing certain is known of Achilles' life. Some Byzantine sources ...
strong tendon at the back of the heel that connects the calf muscles to the heel. The tendon is formed from the gastrocnemius and soleus muscles (the calf muscles) and ... [1 Related Articles]
city, Krasnoyarsk kray (region), south-central Russia. It lies along the Chulym River, which is a tributary of the Ob. It was founded in 1621 and chartered in 1782. Important as ...
(from the article "science, philosophy of") ...strategy began by questioning the Hempelian proposal that ordinary explanations consist in explanation sketches whose force derives from an unarticulated ideal explanation. Philosophers such as Peter Achinstein and Bas van ...
(from the article "fungus") ...in the other. In Allomyces (order Blastocladiales) a pheromone named sirenin, secreted by the female gametes, attracts the male gametes, which swim toward the former and fuse with them. In ...
ethnolinguistic group of northern Uganda and southernmost Sudan. Numbering more than one million at the turn of the 21st century, they speak a Western Nilotic language of the Eastern Sudanic ... [3 Related Articles]
any stony meteorite containing no chondrules (small, roughly spherical objects that formed in the solar nebula). The only exclusions are carbonaceous chondrites of the CI group, which, though they are ... [4 Related Articles]
genetic disorder characterized by an abnormality in the conversion of cartilage into bone. As a consequence, bones that depend on cartilage models for development, particularly long bones such as the ... [3 Related Articles]
(from the article "Trinidad and Tobago") Trinidad and Tobago's labour minister, Larry Achong, resigned from Prime Minister Patrick Manning's cabinet in March 2004 because of the government's failure to enact a special minimum wage for the ...
(from the article "Egypt, ancient") ...independence, 4th-century Egypt was characterized by continual internal struggle for the throne. After a long period of fighting in the delta, a 29th dynasty (399-380 BC) emerged at Mendes. Achoris ...
(from the article "tourmaline") ...usually recognized: iron tourmaline (schorl), black in colour; magnesium tourmaline (dravite), brown; and alkali tourmaline, which may be pink (rubellite), green (Brazilian emerald), or colourless (achroite). Some crystals are pink ...
(from the article "biology") ...microscope languished for nearly 200 years, mainly because the early lenses tended to break up white light into its constituent parts. This technical problem was not solved until the invention ...
(from the article "colour") ...closed curve, as shown in the standard chromaticity diagram. Points along the circumference correspond to saturated colours; pale unsaturated colours appear closer to the centre of the diagram. The achromatic ...
(from the article "bacteria") ...Some bacteria are relatively large, such as Azotobacter, which has diameters of 2 to 5 mum or more; the cyanobacterium Synechococcus, which averages 6 mum by 12 mum; and Achromatium, ...
(from the article "colour blindness") Acquired colour blindness is usually of the blue-yellow type and can be due to retinal diseases, glaucoma, or optic nerve diseases. Total colour blindness (achromatopsia) is an extremely rare congenital ...
Dutch poet whose use of surreal language and imagery influenced a generation of post-World War II poets known as the Experimentalists. His verse, traditional in form, is characterized as romantic ...
(from the article "Gelderland") ...with sandy soil; south is fertile clay alluvium. The northern portion is divided by the broad valley (Gelderse) of the IJssel into the Veluwe ("Bad Land") region on the west ...
(from the article "India") Krishna Deva had passed over his infant son and his young nephew and picked his half brother Achyuta Deva Raya (reigned 1529-42) to succeed him. Following a brief succession dispute, ...
(from the article "mineral") ...flat, platelike individuals arranged in layers; bladed, elongated crystals flattened like a knife blade; fibrous, an aggregate of slender fibres, parallel or radiating; acicular, slender, needlelike crystals; radiating, individuals forming ...
any substance that in water solution tastes sour, changes the colour of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with ... [17 Related Articles]
(from the article "chemical compound") Esters have an alkoxy (OR) fragment attached to the acyl group; amides have attached amino groups (&singlehorzbond;NR2); acyl halides have an attached chlorine or bromine atom; and anhydrides have an ...
(from the article "printmaking") The acid bite of the plate is a critical stage in the making of an etching. The printmaker must be familiar with the characteristics of the materials that are being ...
(from the article "dye") ...groups direct in weakly acidic media. H-acid (8-amino-1-naphthol-3,6-disulfonic acid) has both functional groups and can be selectively coupled to two diazo components in a two-step process. C.I. Acid Black 1 ...
any bright-coloured synthetic organic compound whose molecule contains two groups of atoms-one acidic, such as a carboxylic group, and one colour-producing, such as an azo or nitro group. Acid dyes ... [1 Related Articles]
neutral compound that reacts with water to produce an acid and a hydrogen halide. Acid halides are ordinarily derived from acids or their salts by replacement of hydroxyl groups by ... [1 Related Articles]
(from the article "house") ...such as Frankie Knuckles and Marshall Jefferson, house reached Europe by 1986, with tracks on Chicago labels Trax and DJ International penetrating the British pop charts. In 1988 the subgenre ...
(from the article "lysosome") ...and microorganisms. Each lysosome is surrounded by a membrane that maintains an acidic environment within the interior via a proton pump. Lysosomes contain a wide variety of hydrolytic enzymes (acid ...
(from the article "uranium processing") Acid leaching is commonly performed by agitating an ore-leach mixture for 4 to as long as 48 hours at ambient temperature. Except in special circumstances, sulfuric acid is the leachant ...
(from the article "lead processing") ...for piping and as a lining material. Common lead is fully refined and desilvered lead, with low copper content; it is widely used wherever high corrosion resistance is not necessary. ...
(from the article "enzyme analysis") ...usually shows elevated serum values in such conditions as Paget's disease (inflammation of the bone) and osteomalacia (softening of the bone), as well as in hepatitis and obstructive jaundice; (4) ...
form of precipitation containing a heavy concentration of sulfuric and nitric acids. The term is also commonly applied to snow, sleet, and hail that manifest similar acidification. Such precipitation has ... [10 Related Articles]
acceleration of a chemical reaction by the addition of an acid or a base, the acid or base itself not being consumed in the reaction. The catalytic reaction may be ...
(from the article "acid-base reaction") Certain general principles apply to any solvent with both acidic and basic properties-for example, water, alcohols, ammonia, amines, and acetic acid. Denoting the solvent molecule by SH, proton transfer can ...
a type of chemical process typified by the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O; or acetic acid, ... [12 Related Articles]
(from the article "titration") ...will signal the end point at, or very close to, the equivalence point. Such titrations, classified according to the nature of the chemical reaction occurring between the sample and titrant, ...
(from the article "Mars") ...encompass all of the terrain within 30° of the pole except for the layered terrains immediately around the pole. Three broad lobes extend to lower latitudes. These include Chryse Planitia ...
(from the article "The Environment") ...reef tourism or fishing. Seawater is naturally alkaline, with an average pH of 8.2. (On the pH scale, values above 7 are alkaline, values below 7 are acidic, and lower ...
(from the article "acid-base reaction") ...Since readily accessible values of Ka are always much less than unity, it is often convenient to introduce a quantity pKa, sometimes called the acidity exponent, and defined by the ...
(from the article "acid-base reaction") ...H9O4+), and a decrease in water content increases the proton-donating power of the solution. The acidity of these concentrated solutions is commonly measured by the acidity function, H0, a quantity ...
abnormally high level of acidity, or low level of alkalinity, in the body fluids, including the blood. There are two primary types of acidosis: respiratory acidosis and metabolic acidosis. Respiratory ... [5 Related Articles]
(from the article "nitrogen group element") Two principal techniques for converting phosphate rock to usable materials are practiced. One involves acidulation of the crushed rock-with either sulfuric or phosphoric acids-to form crude calcium hydrogen phosphates that, ...
(from the article "Cassandre") ...cofounded the advertising agency Alliance Graphique and soon turned his attention to experimental typography. In 1929 he designed Bifur, a new typeface. Later, he designed two other typefaces, Acier Noir ...
(from the article "pottery") ...Sevres, and the work of Meissen for the next 50 years is much less important than formerly. The transitional Louis XVI style of c. 1763-74 is typified by the figure ...
(from the article "pharmaceutical industry") ...to allow him use of a laboratory to search for the active substance from the pancreas. Banting guessed correctly that the islet cells secreted insulin, which was destroyed by enzymes ...
(from the article "respiratory disease") ...trachea-there are about 650,000 terminal bronchioles. The cross-sectional area of the bronchial tree increases with increasing subdivision. The end of each terminal bronchiole opens into an acinus, so called because ...
(from the article "sturgeon") A. guldenstadtii is one of the most valuable species inhabiting the rivers of Russia and occurs eastward to Lake Baikal. It is about the same size as the common sturgeon ...
(from the article "sturgeon") The common Old World sturgeon (Acipenser sturio) occurs from Scandinavia to the Mediterranean. A very similar, closely related form, considered a separate species (A. oxyrhynchus) by some authorities, occurs along ...
(from the article "sturgeon") ...in the rivers feeding the Black and Caspian seas. A smaller species, the sterlet (A. ruthenus), inhabits the Black and Caspian seas and is a valuable food fish about 0.9 ...
(from the article "chondrostean") The origin of the order Acipenseriformes (which includes the sturgeon) is not known, although they were clearly derived from some palaeonisciform groups. Fossils that are without doubt related to the ...
town and episcopal see, eastern Sicily, Italy, on terraces above the Ionian Sea at the foot of Mount Etna, 7 miles (11 km) northeast of Catania. Known as Aquilia by ...
in the Greek mythology of Ovid, the son of Faunus (Pan) and the nymph Symaethis. He was a beautiful shepherd of Sicily, the lover of the Nereid Galatea. His rival, ...
(from the article "geography") ...belief that the methods for defining regions were out of line with the scientific approaches characterizing other disciplines. Some felt that geographers had not contributed well to the war effort: ...
(from the article "truck") Steering of trucks, with their relatively heavy loads, was a problem until power steering came into use in the early 1950s. Steering is always by the Ackermann system, which provides ...
(from the article "logic, history of") ...of the semantic and syntactic notions necessary to characterize consistency precisely. The first clear proof of the consistency of the first-order predicate logic is found in the work of Hilbert ...
(from the article "1986: Other Winners") ...Screenplay: Woody Allen for Hannah and Her SistersAdapted Screenplay: Ruth Prawer Jhabvala for A Room with a ViewCinematography: Chris Menges for The MissionArt Direction: Brian Ackland-Snow and Gianni Quaranta for ...
(from the article "gastropod") ...rocky areas.Conical-shelled limpets, without slits or holes, found in rocky shallow waters (Acmaeidae and Patellidae).Small to large spiral shells in shallow to deep ocean waters, often brightly ...
(from the article "baseball") ...being raised. Black players were in the minor leagues for the next few years, but their numbers declined steadily. The last black players in the recognized minor leagues during 19th ...
member of a small group of early-20th-century Russian poets reacting against the vagueness and affectations of Symbolism. It was formed by the poets Sergey Gorodetsky and Nikolay S. Gumilyov. They ... [5 Related Articles]
(from the article "aegirine") ...occurs in crystalline schists. Aegirine forms a continuous chemical series with aegirine-augite, in which calcium replaces sodium, and magnesium and aluminum replace iron. In this series, the name acmite is ...
any inflammatory disease of the sebaceous, or oil, glands of the skin. There are some 50 different types of acne. In common usage, the term acne is frequently used alone ... [3 Related Articles]
(from the article "childhood disease and disorder") Acne vulgaris (common acne) is a prevalent skin condition that has its onset during adolescence. At puberty, androgenic stimulation of the skin's sebaceous (oil) glands (which empty into the canals ...
(from the article "Literature") ...trance. He would stare straight ahead and utter a low hum and beat time with his hands. People would come up to him and ask him if he was all ...
(from the article "gastropod") ...shell; operculum present; gill and radula absent; long proboscis with stylet; ectoparasitic; in warm oceanic areas; generally minute.Three families with visceral mass longer than foot; 4 species in fresh ...
(from the article "flatworm") ...endocommensal (i.e., living, respectively, outside or inside another organism without harming it), or parasitic; about 3,000 species.Exclusively marine; mouth present; pharynx simple or lacking; no intestine; without protonephridia, oviducts, ...
(from the article "animal") Flatworms (phyla Platyhelminthes, Nemertea, and Mesozoa) lack a coelom, although nemerteans have a fluid-filled cavity at their anterior, or head, end, which is used to eject the proboscis rapidly. The ...
monks at a series of 5th- to 6th-century Byzantine monasteries who were noted for their choral recitation of the divine office in constant and never interrupted relays. Their first monastery, ... [1 Related Articles]
(from the article "Texcoco") city built in the present-day Valley of Mexico by the Acolhuas, a pre-Columbian people of the Nahuatl-speaking group of tribes, which gained mastery of the valley after the collapse of ...
(from Greek akolouthos, "server," "companion," or "follower"), in the Roman Catholic church, a person is installed in a ministry in order to assist the deacon and priest in liturgical celebrations, ... [1 Related Articles]
