(from the article "regeneration") Sometimes that which is regenerated is very different from the original. Among the arthropods there are cases in which the stump of an antenna grows a leg, while a cut ...
(from the article "pocket mouse") Pocket mice are classified in the family Heteromyidae, meaning "different mouse," or "other mouse," in Greek. This family also includes kangaroo rats and kangaroo mice. Within Heteromyidae, the silky and ...
(from the article "opossum shrimp") ...species Mysis relicta, which is common in cold lakes of North America, Great Britain, and northern Europe, is an important food for lake trout in the Great Lakes. Some species, ...
(from the article "Eleaticism") The serious discussion and criticism of the Eleatic philosophy, however, and the positive interpretation of every Non-Being as a heteron (i.e., as a being characterized only by its difference from ...
(from the article "Tillich, Paul") ...freedom to explore life without sacrificing the essentials of a meaningful tradition became his early and lifelong preoccupation. It appears as a major theme in his theological work: the relation ...
in music, texture resulting from simultaneous performances of melodic variants of the same tune, typical of Middle Eastern practices as well as of a vast array of folk music. Balkan ... [3 Related Articles]
(from the article "genetic disease, human") ...adenosine triphosphate (ATP). Severity and even penetrance can vary widely for disorders resulting from mutations in the mitochondrial DNA, generally believed to reflect the combined effects of heteroplasmy (i.e., mixed ...
(from the article "grassland") ...are generally dominated by species of the spinifex grasses, Plectrachne and Triodia, which form characteristic hummocks by trapping windblown sand at the bases of their tussocks. Heteropogon and Sorghum dominate ...
(from the article "electric generator") ...the field and the output winding are on the stator. In the homopolar type of machine, the magnetic flux is produced by direct current in a stationary field coil concentric ...
(from the article "coordination compound") ...type of acid anhydride, they are called isopoly acids, and their salts are called isopoly salts. The acid anhydrides also can condense with other acids (e.g., phosphoric or silicic acids) ...
(from the article "coordination compound") The amphoteric metals of groups VB (vanadium, niobium, and tantalum) and VIB (chromium, molybdenum, and tungsten) in the +5 and +6 oxidation states, respectively, form weak acids that readily condense ...
(from the article "coordination compound") ...called isopoly acids, and their salts are called isopoly salts. The acid anhydrides also can condense with other acids (e.g., phosphoric or silicic acids) to form heteropoly acids, which can ...
(from the article "coordination compound") ...and heteropolytungstates are always prepared in solution, usually after acidifying and heating the theoretical amounts of reactants. In general, free heteropoly acids and salts, of which the heteropolymolybdates and heteropolytungstates ...
(from the article "Representative heteropolysaccharides") In general, heteropolysaccharides (heteroglycans) contain two or more different monosaccharide units. Although a few representatives contain three or more different monosaccharides, most naturally occurring heteroglycans contain only two different ones ...
(from the article "coordination compound") ...are always prepared in solution, usually after acidifying and heating the theoretical amounts of reactants. In general, free heteropoly acids and salts, of which the heteropolymolybdates and heteropolytungstates are the ...
any member of the insect order Heteroptera, which comprises the so-called true bugs. (Some authorities use the name Hemiptera; others consider both the heteropterans and the homopterans to be suborders ... [4 Related Articles]
(from the article "sexual behaviour, human") By far the greatest amount of sociosexual behaviour is heterosexual behaviour between only one male and one female. Heterosexual behaviour frequently begins in childhood, and, while much of it may ...
(from the article "algae") ...with mucocysts (mucilage-releasing bodies) occasionally found in freshwater or marine environments; fewer than 50 species; Heterosigma, Vacuolaria, and Olisthodiscus.
the increase in such characteristics as size, growth rate, fertility, and yield of a hybrid organism over those of its parents. Plant and animal breeders exploit heterosis by mating two ... [5 Related Articles]
(from the article "palm") Stamens, though most often 6 in number, may rarely be 3 (Areca triandra, Geonoma triandra, Nypa fruticans) or more numerous, ranging from 6 to 36 in Heterospathe, to more than ...
mating in which the man and woman have incompatible blood types, such that the woman may develop antibodies to her partner's blood type. This mating causes difficulties in childbirth, since ...
(from the article "protonosphere") ...the ionosphere. In the lowest part of the Earth's atmosphere, called the homosphere (100 km [about 65 miles]), turbulence causes a continuous mixing of the atmospheric constituents, whereas in the ...
(from the article "plant") A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, ...
(from the article "fish") Heterostracan remains are next found in what appear to be delta deposits in two North American localities of Silurian age. By the close of the Silurian, about 400,000,000 years ago, ...
(from the article "materials science") ...even though the composition of the materials may differ-e.g., gallium aluminum arsenide (GaAlAs) grown atop a gallium arsenide substrate. The resulting layers form what is called a heterostructure. Most continuously ...
(from the article "pollination") ...and oats. Avocado has both protogynous and protandrous varieties, and these often are grown together to encourage cross-fertilization. A structural feature of flowers that discourages selfing is heterostyly, or variation ...
(from the article "fungus") ...types, often designated + and − (or A and a). Gametes produced by one type of thallus are compatible only with gametes produced by the other type. Such fungi are ...
(from the article "thrips") ...8- or 9-segmented; ovipositor downturned, often weakly developed; forewings narrow, surface smooth; antennal sensors on intermediate segments disclike.Cretaceous (Cedar Lake amber) to present. Western Hemisphere and India. Antennae nine-segmented; ...
(from the article "hormone") An unexpected property of mammalian FSH and LH is that both have a thyrotropic action (i.e., stimulate secretion of thyroid hormones) in lower vertebrates. This so-called heterothyrotropic effect has led ...
(from the article "osteoglossomorph") ...emitting sounds. In all Notopteroidei (including the Hiodontidae) the swim bladder is closely connected with the inner ear, a condition that may be an aid to hearing. Except for the ...
(from the article "osteoglossomorph") ...its Indo-Australian relatives Scleropages leichardti and S. formosus carry the eggs and young in the mouth of one parent; little else is known of their breeding habits. The African Heterotis ...
(from the article "transplant") ...situation in the recipient and are then known as orthotopic-for example, skin to the surface of the body. Alternatively, they may be transplanted to an abnormal situation and are then ...
(from the article "cardiovascular disease") ...in which one, two, or even three cardiac valves may be removed and replaced with the appropriate artificial valve. The use of both homograft valves (obtained from human beings after ...
any member of the ciliated protozoan order Heterotrichida. Complete ciliation is typical, although there is a tendency toward loss of the cilia, which are minute, hairlike processes, in several families ...
(from the article "protozoan") ...(i.e., contain no photosynthetic pigments); they obtain their nutrients by feeding on algae, bacteria, and other protozoa. Such flagellates have an animal-like nutrition and are called heterotrophs. Some colourless flagellates ...
(from the article "Oparin, Aleksandr") ...arising in a brew of already formed organic compounds. He stated a number of premises that were not popular at the time. For example, according to his hypothesis, the earliest ...
(from the article "Life Sciences") ...the organism is said to be homozygous with respect to that gene, and the appearance of the corresponding trait is assured. When the two alleles are not identical, the organism ...
(from the article "circus") ...the efforts of Phineas T. Barnum, who was already a household name by the time he promoted his first circus at age 61. Barnum began his career as a showman ...
British journalist who, in his role as the newspaper's editor (1956-75), transformed the Manchester Guardian from a well-regarded, left-of-centre regional daily into The Guardian, a London-based, highly respected national newspaper ...
(from the article "Little Armenia") ...Rubenid dynasty in the 12th century. The Rubenids ruled first as barons and then, from 1199 to 1226, as kings of Cilicia. Thereafter the family of Oshin, another Armenian noble, ...
military title used in the Polish-Lithuanian state (16th-18th century); the hetman wielki ("great hetman") was the chief of the armed forces and the commander in the field when the king ... [2 Related Articles]
(from the article "Ukraine") After the partition of 1667, the autonomous hetman state, or Hetmanate, was limited territorially to the east, in Left Bank Ukraine. (The hetman state in Right Bank Ukraine, under at ...
(from the article "flower chafer") ...Most flower chafers have only small protuberances on the tops of their heads and prothorax (region immediately behind the head), although some have long hornlike structures. The colour of Hetorrhina ...
(from the article "chromatography") ...with an open tubular gas chromatographic column 1.6 kilometres (1 mile) long. A more appropriate parameter for measuring efficiency is the height equivalent to a theoretical plate (or plate height), ...
lowest of the four divisions of the Lower Jurassic Series, representing all rocks formed worldwide during the Hettangian Age, which occurred between 199.6 million and 196.5 million years ago during ...
(from the article "Literature") A number of other novels by younger writers dealt with problematic aspects of the contemporary world. Thomas Hettche's novel Woraus wir gemacht sind, for instance, featured a young German writer ...
German geographer who sought to place geography on a firm philosophical and scientific foundation. He strongly influenced the modern development of geography in Germany.
(from the article "pratyaya") in Buddhist philosophy, an auxiliary, indirect cause, as distinguished from a direct cause (hetu). A seed, for example, is a direct cause of a plant, while sunshine, water, and earth ...
hydrated sodium and calcium aluminosilicate mineral in the zeolite family, formulated (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O. It forms brittle, transparent, coffin-shaped crystals in various shades of white through red, gray, or brown. Heulandite's molecular ... [2 Related Articles]
Celtic fortified site overlooking the Danube River in Baden-Wurttemberg Land (state), Germany. Recent excavations have shown that the Heuneburg fort community carried on a prosperous trade with the Greeks at ... [1 Related Articles]
president of the Dominican Republic who allowed most of his country's economy to fall under U.S. control. The republic's fiscal disorder led to American intervention after Heureaux's assassination. [1 Related Articles]
(from the article "artificial intelligence") ...of Edinburgh), later recalled that Turing often discussed how computers could learn from experience as well as solve new problems through the use of guiding principles-a process now known as ...
(from the article "chess") The ability of a machine to play chess well has taken on symbolic meaning since the first precomputer devices more than a century ago. In 1890 a Spanish scientist, Leonardo ...
any of the first magnetic alloys composed of metals that, in their pure state, are not magnetic. The alloys are named after Fritz Heusler, 19th-century German mining engineer and chemist. ...
(from the article "Heusler alloy") any of the first magnetic alloys composed of metals that, in their pure state, are not magnetic. The alloys are named after Fritz Heusler, 19th-century German mining engineer and chemist. ...
liberal democratic legislator, first president of West Germany, author, and leader of the Free Democratic Party (Freie Demokratische Partei, FDP). He also helped draft a new constitution for postwar West ... [1 Related Articles]
Dutch general and governor-general of the Dutch East Indies (1904-09) who conquered the Sumatran kingdom of Acheh (Atjeh) and brought all of Indonesia directly under Dutch rule. [1 Related Articles]
in northern Buddhism, a fierce protective deity, the yab-yum (in union with his female consort, Vajrayogini) form of the fierce protective deity Heruka. Hevajra is a popular deity in Tibet, ...
(from the article "mask") The Papuans of New Guinea build mammoth masks called hevehe, attaining 20 feet in height. They are constructed of a palm wood armature covered in bark cloth; geometric designs are ...
astronomer who compiled an atlas of the Moon (Selenographia, published 1647) containing one of the earliest detailed maps of its surface as well as names for many of its features. ... [1 Related Articles]
(from the article "Edenbridge") ...England, south of London near the Surrey border, on the River Eden. It was enlarged after 1970 to accommodate overspill population from London, and light industries have been introduced. Nearby ...
megye (county), northern Hungary. It is bounded by the counties of Borsod-Abauj-Zemplen to the north and east, Jasz-Nagykun-Szolnok to the south, Pest to the southwest, and Nograd to the west. ...
chemist and recipient of the 1943 Nobel Prize for Chemistry. His development of isotopic tracer techniques greatly advanced understanding of the chemical nature of life ... [1 Related Articles]
(from the article "Western sculpture") Prominent early British Neoclassicist sculptors included John Wilton, Joseph Nollekens, John Bacon the Elder, John Deare, and Christopher Hewetson, the last two working mostly in Rome. The leading artist of ...
Australian writer (b. May 21, 1923, Perth, Australia-d. Aug. 25, 2002, Springwood, N.S.W., Australia), rebelled against the comforts of a conventional lifestyle to embrace progressivist causes in her life and ...
British astrophysicist who won the Nobel Prize for Physics in 1974 for his discovery of pulsars (cosmic objects that emit extremely regular pulses of radio waves). [2 Related Articles]
American industrialist, philanthropist, and politician who in 1886 defeated Henry George and Theodore Roosevelt to become mayor of New York City. [2 Related Articles]
Australian professional tennis player whose astonishing court speed, fierce determination, and unrelenting ground strokes allowed him to capture victories at both the U.S. Open (2001) and Wimbledon (2002). [3 Related Articles]
(from the article "Fuller, R Buckminster") ...Harvard University and never completed his formal education. He saw service in the U.S. Navy during World War I as commander of a crash-boat flotilla. In 1917 he married Anne ...
American engineer and businessman (b. May 20, 1913, Ann Arbor, Mich.-d. Jan. 12, 2001, Palo Alto, Calif.), was the cofounder of the Hewlett-Packard Co. (HP), the electronics and computer giant ... [2 Related Articles]
American manufacturer of computers, computer peripherals, and instrumentation equipment with headquarters in Palo Alto, California. [8 Related Articles]
British anatomist and physiologist who described blood coagulation and isolated a key protein in the coagulation process, fibrinogen, which he called coagulable lymph. He also investigated the structure of the ... [1 Related Articles]
(from the article "number game") ...where it quickly became popular under the name of Polygon. It was invented independently in the United States in 1948 by John Nash, and a few years later one version ...
emblem painted on a barn, especially in Pennsylvania Dutch country, an agricultural region in southeastern Pennsylvania largely settled by German immigrants who have preserved ethnic custom and identification to a ... [1 Related Articles]
(from the article "The Environment") Disagreement was anticipated over the risks from brominated flame retardants such as hexabromocyclododecane (HBCD) and decabromodiphenyl ether (decaBDE) that might be included in the second phase. These substances entered the ...
(from the article "organometallic compound") The carbonyl ligands in the tetracarbonylnickel molecule project toward the vertices of a tetrahedron, and thus the structure is referred to as tetrahedral. Similarly, the six carbonyl ligands in hexacarbonylchromium ...
(from the article "antimicrobial agent") ...other antiseptic agents. The phenols contain a large number of common antiseptics and disinfectants, among them phenol (carbolic acid) and creosote, while such bisphenols as hexyl resorcinol and hexachlorophene are ...
complex compound formed by dissolving platinum metal in aqua regia (a mixture of nitric and hydrochloric acids) or in hydrochloric acid that contains chlorine. It is crystallized from the solution ...
in music, six-note pattern corresponding to the first six tones of the major scale (as, C-D-E-F-G-A). The names of the degrees of the hexachord are ut, re, mi, fa, sol, ... [2 Related Articles]
(from the article "industrial polymers, major") A number of fluorinated polymers or copolymers having elastomeric properties are produced that incorporate the monomers vinylidene fluoride (CH2&doublehorzbond;CF2), hexafluoropropylene (CF2&doublehorzbond;CFCF3), and chlorotrifluoroethylene (CF2&doublehorzbond;CFCl) in addition to tetrafluoroethylene. These elastomers ...
(from the article "crystal") ...atoms will occupy. The third layer can be placed over the atoms of the first layer, generating an alternate layer sequence ABABAB . . ., which is called the hexagonal- ...
(from the article "basketry") ...which are in some cases completely woven and in others form an intermediate stage between woven and lattice basketry. The intermediate type (with two layered elements, one woven) is known ...
one of the principal categories of structures to which a given crystalline solid can be assigned. Components of crystals in this system are located by reference to four axes-three of ... [7 Related Articles]
(from the article "Canadian literature") ...frustration, or despair. Each, especially Grandbois, influenced younger writers; for the first time, poets of Quebec, rather than poets of France, served as models for the next generation-the Hexagone poets.
(from the article "Yijing") ...minds and its universal popularity are due to a cosmology that involves humans and nature in a single system. The uniqueness of the Yijing consists in its presentation of 64 ...
(from the article "iron meteorite") ...been grouped according to their crystal structure, which can be revealed through etching a polished cross section of the meteorite with dilute acid. There are three groups grading into one ...
a line of verse containing six feet, usually dactyls (' ˘ ˘). Dactylic hexameter is the oldest known form of Greek poetry and is the preeminent metre of narrative and ... [3 Related Articles]
(from the article "drug") Nicotinic-receptor antagonists are divided into those that act mainly on skeletal muscle and those that act on ganglia cells. The latter group includes hexamethonium and trimethaphan. These drugs cause overall ...
(from the article "amine") ...at a high temperature, catalyzed by metals or metal oxide catalysts (e.g., nickel or copper). Mixtures of primary, secondary, and tertiary amines are thereby produced. Some amines-such as hexamethylenediamine, used ...
(from the article "diplomonad") ...Feeding is by digestion or absorption. Of importance to man are Giardia lamblia (see photograph), which occurs in the human intestine and sometimes causes severe diarrhea, and Hexamita meleagridis, the ...
(Greek: "Sixfold"), edition of the Old Testament compiled by Origen of Alexandria in Caesarea, Palestine, before AD 245. The Hexapla presented for comparison the Hebrew text of the Old Testament, ... [3 Related Articles]
(from the article "Poaceae") ...wheats there are three levels of ploidy, or sets of chromosome complements: diploid (2n), the normal condition; tetraploid (2n = 14, resulting from the fusion of diploid gametes); and hexaploid ...
(from the article "spider") ...claws; eyes closely grouped; most species at least 3 cm or more in length; inhabit silk-lined tubes in ground, with entrances covered by hinged silk lids.82 mostly tropical species. ...
(from the article "organosulfur compound") Like thiols, sulfides can form metal complexes, particularly in the case of cyclic polysulfides with crown etherlike structures, such as the hexathia-18-crown-6. Oxidation of sulfides yields sulfoxides or, under more ...
(from the article "liquid crystal") ...of order. The smectic-C phase and those listed below it have molecules tilted with respect to the layers. Continuous in-plane rotational symmetry, present within smectic-A layers, is broken in the ...
(from the article "ballad") ...affected by sophisticated conditioning does not avail itself of the full seven tones that compose each of the modal scales. Instead, it exhibits gapped scales, omitting either one of the ...
(from the article "stingray") The possible existence of another stingray family, consisting of deepwater species, was indicated in 1981 with the identification of Hexatrygon bickelli. The specimen, found on the coast of South Africa, ...
town, Tynedale district, administrative and historic county of Northumberland, England, on the upper River Tyne. Its abbey church of St. Andrew, containing a great stone staircase, dominates the town. The ...
