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H (unit of energy measurement)
unit of either self-inductance or mutual inductance, abbreviated h (or hy), and named for the American physicist Joseph Henry. One henry is the value of self-inductance in a closed circuit or coil in which one volt is produced by a variation of the inducing current of on...
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h (physics)
(symbol h), fundamental physical constant characteristic of the mathematical formulations of quantum mechanics, which describes the behaviour of particles and waves on the atomic scale, including the particle aspect of light. The German physicist Max Planck introduced the constant...
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H (chemical element)
a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements. The hydrogen atom has a nucleus consisting of a proton bearing one unit of positive electrical charge; an electron, bearing one unit of negative electrical charge, is also associated with this nucle...
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H Acid (chemistry)
...and the directive effects are pH-dependent. In alkaline media, coupling is directed by the −OH groups, whereas −NH2 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 is formed by coupling first......
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h and Chi Persei (astronomy)
...clusters and can be accounted for in detail by calculations of the rate of evolution of stars of different absolute magnitudes and mass. For example, the luminosity function for the young clusters h and χ Persei, when compared with the van Rhijn function, clearly shows a large overabundance of bright stars due to the extremely young age of the cluster, which is on the order of......
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H I region (astronomy)
interstellar matter in which hydrogen is mostly neutral, rather than ionized or molecular. Most of the matter between the stars in the Milky Way Galaxy, as well as in other spiral galaxies, occurs in the form of relatively cold neutral hydrogen gas. Neutral hydrogen clouds are easily detectable at radio ...
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H II region (astronomy)
interstellar matter consisting of ionized hydrogen atoms. The energy that is responsible for ionizing and heating the hydrogen in an emission nebula comes from a central star that has a surface temperature in excess of 20,000 K. The density of these clouds normally ranges from 10 to 100,000 particles per...
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H zone (anatomy)
...(for the relation of cross bridges to the molecular architecture of thick filaments, see below). In the middle of the A band, where only thick filaments are present, is a region called the H zone; the H zone looks somewhat lighter than the overlap region of the A band. Also in the A band is a narrow, lightly stained region that contains bare thick filaments without cross bridges and is.....
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h-bar (physics)
in physics, the amount of angular momentum associated with a subatomic particle or nucleus and measured in multiples of a unit called the Dirac h, or h-bar (ℏ), equal to the Planck constant divided by 2π. For electrons, neutrons, and protons, the multiple is 0.5;...
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H-bomb (fusion device)
weapon whose enormous explosive power results from an uncontrolled, self-sustaining chain reaction in which isotopes of hydrogen combine under extremely high temperatures to form helium in a process known as nuclear fusion. The high temperatures that are required for the reaction are produced by the detonation of an atomic bomb....
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H-II (launch vehicle)
...agency next developed the H-I, which had a Delta-derived first stage but a Japanese-designed cryogenically fueled upper stage. In 1984 Japan decided to develop an all-Japanese launch vehicle, the H-II, using cryogenic propellants in both stages and a very advanced first-stage rocket engine. The H-II was first launched in 1994; it proved a very expensive vehicle because of its total dependence.....
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H-II Transfer Vehicle (Japanese spacecraft)
unmanned Japanese spacecraft that carries supplies to the International Space Station (ISS). The first HTV was launched from the Tanegashima Space Centre on Tanegashima Island, Kagoshima prefecture, on Sept. 11, 2009....
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H-IIA (launch vehicle)
...rocket engine. The H-II was first launched in 1994; it proved a very expensive vehicle because of its total dependence on Japanese-manufactured components. Thus, Japan decided in 1996 to develop an H-IIA vehicle that would use some foreign components and simplified manufacturing techniques to reduce the vehicle’s costs. There are several models of the H-IIA, with both solid rocket motors...
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H-R diagram (astronomy)
in astronomy, graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types. Of great importance to theories of stellar evolution, it evolved from charts begun in 1911 by the Danish astronomer Ejnar Hertzsprung and indepe...
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H-Y antigen
...into that of the male (a testicle). The gonadal action of the Y chromosome is mediated by a gene located near the centromere; this gene codes for the production of a cell surface molecule called the H-Y antigen. Further development of the anatomic structures, both internal and external, that are associated with maleness is controlled by hormones produced by the testicle. The sex of an individua...
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H. D. (American poet)
American poet, known initially as an Imagist. She was also a translator, novelist-playwright, and self-proclaimed “pagan mystic.”...
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“H. L. Hunley” (submarine)
first submarine to sink an enemy ship. Operated from 1863 to 1864, it was a Confederate invention of the American Civil War....
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H. Nakano (Japanese scientist)
...materials scientist F.R.N. Nabarro in the early 1950s, were quickly adapted by seismologists to explain the radiation from propagating slip distributions on faults. The Japanese seismologist H. Nakano had already shown in 1923 how to represent the distant waves radiated by an earthquake as the elastodynamic response to a pair of force dipoles amounting to zero net torque. (All his......
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H. Sophie Newcomb Memorial College for Women (college, New Orleans, Louisiana, United States)
...as Tulane University of Louisiana, named in honour of Paul Tulane, who had made a substantial donation to the university in 1882. In 1886, another benefactor, Josephine Louise Newcomb, established H. Sophie Newcomb Memorial College for Women as a coordinate college. In 1894 Tulane moved from its original downtown location to its campus uptown. An engineering school was added in 1894, an......
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H.J. Heinz Company (American corporation)
major American manufacturer of processed foods, which are distributed in approximately 200 countries throughout the world. Its “57 Varieties” slogan was devised in 1896, but today the company markets more than 5,700 products. Its headquarters are in Pittsburgh....
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H.M.S. Pinafore (work by Gilbert and Sullivan)
The northward spread of the Offenbach model reached England, where it influenced the character of Sullivan’s first operetta, Cox and Box (1867). It led in due course to the success of H.M.S. Pinafore (1878), in collaboration with Gilbert, and the subsequent line of “Savoy operettas” (their collective nickname derived from the London theatre where they were first....
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H1 antagonist (drug)
...chemical drugs called antihistamines, which prevent the binding of histamine to these receptors. Conventional antihistamines used to treat allergies block H1 receptors and thus are called H1 antagonists. H2 antagonists are those drugs, such as cimetidine (Tagamet), that inhibit gastric acid secretion and are used to help heal ......
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H1N1 (virus)
virus that is best known for causing widespread outbreaks, including epidemics and pandemics, of acute upper or lower respiratory tract infection. The influenza A H1N1 virus is a member of the family Orthomyxoviridae (a group of RNA viruses). Type A ...
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H1N1 flu
the first major influenza outbreak in the 21st century, noted for its rapid global spread, which was facilitated by an unusually high degree of viral contagiousness. Global dissemination of the virus was further expedited by the unprecedented rates of passenger travel that characterize the modern era....
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H1N1 Flu: The Pandemic of 2009 (influenza pandemic (H1N1) of 2009)
In February 2009 a young boy in the small Gulf-coast town of La Gloria, Veracruz, Mex., fell ill with an influenza-like disease of unknown cause. Within weeks nearly 30% of the town’s residents had been affected by a similar sickness, and people in nearby villages had fallen ill as well. The young boy, however, was the only individual from the re...
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H2 blocking agent (drug)
...block the effects of epinephrine and norepinephrine on the heart (beta blockers, or beta-adrenergic blocking agents) and, second, of drugs that block the effect of histamine on the stomach (H2-blocking agents), both of which are of major therapeutic importance....
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H2Cl2(CH3)2 (chemical compound)
The formula X = 2n reliably gives the maximum number of stereoisomers, but in situations of high symmetry it fails to give the real number. For example, it fails for 2,3-dichlorobutane [H2Cl2(CH3)2]. One pair of enantiomers, SS and RR, does appear. But the other combination gives an identical “pair”......
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H2N2 (disease)
Subsequent outbreaks of influenza have been less severe. For example, influenza A subtype H2N2, or Asian flu, apparently began in East Asia early in 1957, and by midyear it had circled the globe. After 10 years of evolution that produced annual epidemics, the Asian flu disappeared in 1968, only to be replaced by a new influenza A subtype,......
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H2S (radar)
...the RAF used two radar-beam systems called Gee and Oboe to guide its Lancaster and Halifax bombers to cities on the Continent. In addition, the bombers carried a radar mapping device, code-named H2S, that displayed reasonably detailed pictures of coastal cities such as Hamburg, where a clear contrast between land and water allowed navigators to find the target areas. In order to......
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H3N2 (disease)
...circled the globe. After 10 years of evolution that produced annual epidemics, the Asian flu disappeared in 1968, only to be replaced by a new influenza A subtype, H3N2. This virus, also known as Hong Kong flu, is still in circulation. The Hong Kong flu outbreak in 1968 produced the first influenza pandemic since that of 1918–19. However, unlike the earlier pandemic, the Hong Kong flu......
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H5N1 virus
...deaths. In 1997 a type of avian influenza, or bird flu, virus broke out among domesticated poultry in Hong Kong and then infected a small number of people, killing some of them. This same virus, H5N1, reappeared among chicken flocks in Southeast Asia during the winter of 2003–04, again infecting some people fatally. Today several......
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HA (mineral)
phosphate mineral, calcium hydroxide phosphate [Ca5(PO4)3OH], that forms glassy, often green crystals and masses. It is seldom pure in nature but often occurs mixed with fluorapatite, in which fluorine substitutes for the hydroxyl (OH) group in the molecule. This mixture, called a solid-solution...
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ha (unit of measurement)
unit of area in the metric system equal to 100 ares, or 10,000 square metres, and the equivalent of 2.471 acres in the British Imperial System and the United States Customary measure. The term is derived from the Latin area and fro...
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Ha (people)
a Bantu-speaking people belonging to the Interlacustrine Bantu ethnolinguistic family who live in western Tanzania bordering on Lake Tanganyika. Their country, which they call Buha, comprises grasslands and open woodlands. Agriculture is their primary economic activity. Sorghum, millet, corn (maize), cassava, yams, peanuts (...
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Ha (chemical element)
an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. The discovery of dubnium (...
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Ha brekha (poem by Bialik)
...Pool”). Metey midbar imaginatively builds on a Talmudic legend about the Jewish host (in the biblical book of Exodus) who perished in the desert. Ha-brekha is a visionary nature poem in which the body of water reveals to the poet the wordless language of the universe itself....
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“Ha estallado la paz” (work by Gironella)
...en Dios (1953; The Cypresses Believe in God), Un millón de muertos (1961; The Million Dead), and Ha estallado la paz (1966; Peace After War)....
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Ha Giang (Vietnam)
...en Dios (1953; The Cypresses Believe in God), Un millón de muertos (1961; The Million Dead), and Ha estallado la paz (1966; Peace After War).......
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Ha Jin (Chinese American writer)
Chinese American writer. He joined the Chinese army at age 14. He moved to the United States and entered Brandeis University in 1985. He received a doctorate there in 1992 and subsequently taught at...
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Ha Long Bay (bay, Vietnam)
bay on the northwest coast of the Gulf of Tonkin, near the city of Hong Gai, Quang Ninh province, northern Vietnam. Situated 102 miles (164 km) southeast of Hanoi, the 580-square-mile (1,500-square-kilometre) area contains some 3,000 rocky and earthen islands, typically in the form of jagged limestone pillars jutting out f...
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Ha Noi (Vietnam)
capital, from 1976, of Vietnam; capital, 1954–76, of North Vietnam; and former capital of French Indochina. The city is situated in northern Vietnam on the western bank of the Red River, about 85 miles (140 km) inland from the South China Sea....
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Ha-erh-pin (China)
city, capital of Heilongjiang sheng (province), northeastern China. It is located on the south bank of the Sungari (Songhua) River. The site of the city is generally level to undulating, except near the river itself, where low bluffs lead down to the floodplain in places; low-lying areas are subject to flooding. The clim...
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ha-Levi, Elye ben Asher (Italian grammarian)
German-born Jewish grammarian whose writings and teaching furthered the study of Hebrew in European Christendom at a time of widespread hostility toward the Jews....
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ha-Levi, Isaac ben Moses (Spanish philosopher)
Jewish philosopher and linguist, the author of a devastating satire on medieval Christianity and of a notable work on Hebrew grammar....
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ha-Levi, Judah (Hebrew poet)
Jewish poet and religious philosopher. His works were the culmination of the development of Hebrew poetry within the Arabic cultural sphere. Among his major works are the poems collected in Dīwān, the “Zionide” poems celebrating Zion, and the Sefer ha-Kuzari (“Book of the Khazar”), presen...
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Ha-mi (China)
city and oasis, eastern Uygur Autonomous Region of Xinjiang, China. An important stage on the roads from Gansu province into Central Asia and to the west, Hami was known to the Chinese in early times as Yiwu, the name Hami being the Chinese rendering of the Mongolian version (Khamil) of the Uighur name for...
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HA-MRSA (bacterium)
city and oasis, eastern Uygur Autonomous Region of Xinjiang, China. An important stage on the roads from Gansu province into Central Asia and to the west, Hami was known to the Chinese in early times as Yiwu, the name Hami being the Chinese rendering of the Mongolian version (Khamil) of the Uighur name for...
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ha-Negev (desert region, Israel)
(The Southland), arid region, southern part of Israel, occupying almost half of Palestine west of the Jordan, and about 60 percent of Israeli territory under the 1949–67 boundaries. The name is derived from the Hebrew verbal root n-g-b, “to dry,” or “to wipe dry.” Triangular shaped with the apex at the south, it is bounded by the ...
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Ha-neziv (Jewish scholar)
Jewish scholar who developed the yeshiva (a school of advanced Jewish learning) at Volozhin, in Russia, into a spiritual centre for Russian Jewry and thus helped keep alive the rationalist traditions of the great 18th-century Jewish scholar Elijah ben Solomon. He was one of the first rabbis to join the Zionist movement....
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ha-Sharon (plain, Israel)
section of the Mediterranean coastal plain, and the most densely settled of Israel’s natural regions. It is roughly triangular in shape and extends about 55 miles (89 km) north-to-south from the beach at Mount Carmel to the Yarqon River at ...
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Ha-Tiqva (work by Imber)
itinerant Hebrew poet whose poem “Ha-Tiqva” (“The Hope”), set to music, was the official anthem of the Zionist movement from 1933 and eventually became Israel’s national anthem....
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Ha-Tizmoret Ha-Filharmonit Ha-yisretʾelit (orchestra)
Israeli symphony orchestra based in Tel Aviv–Yafo, founded in 1936 by Bronislaw Huberman as the Palestine Orchestra. Huberman assembled a professional symphony orchestra of high calibre, consisting of Europe’s most talented Jewish symphonic players. Arturo Toscanini conduct...
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HA.A (ancient city, Mesopotamia, Asia)
...It would be particularly important to isolate the Subarian components (related to Hurrian), whose significance was probably greater than has hitherto been assumed. For the south Mesopotamian city HA.A (the noncommittal transliteration of the signs) there is a pronunciation gloss “shubari,” and non-Sumerian incantations are known in the language of HA.A that have turned out to be.....
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Haabai Group (islands, Tonga)
central island cluster of Tonga, in the South Pacific Ocean about 1,400 miles (2,300 km) north-northeast of Auckland, N.Z. Comprising some five dozen coral and volcanic islands and coral reefs, the group is dispers...
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Haad Yai (Thailand)
city on the Malay Peninsula, extreme southern Thailand. It has become a modern, rapidly growing commercial city by virtue of its position on the major road south to Malaysia and on the junction of the eastern and western branches of the Bangkok-Singapore railroad. It also has an international airport. Hat Yai is a centre of the ...
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Haag, Den (The Netherlands)
seat of government of The Netherlands. It is situated on a coastal plain 4 miles (6 km) from the North Sea. The Hague is the administrative capital of the country and the home of the court and government, though Amsterdam is the official capital....
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Haak, Bob (Dutch art historian)
...the value of whose judgment rested solely on the authority attributed to them by the art world of their time. To allow for a broader range of insights, the original founders of the RRP, Bob Haak and Josua Bruyn, established a team of six (later five) art historians who held posts in museums, universities, and other institutions. By working as a team, it was hoped, they could arrive......
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Haakon Broadshouldered (king of Norway)
king of Norway (1157–62), illegitimate son of Sigurd Munn (d. 1155)....
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Haakon, Crown Prince (Norwegian prince)
heir apparent to the Norwegian throne, the only son of King Harald V and Queen Sonja....
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Haakon, Crown Prince, and Crown Princess Mette-Marit
On Aug. 25, 2001, Crown Prince Haakon of Norway married Mette-Marit Tjessem Høiby, who was not only a commoner but also a single mother when they began dating in 1999. Even in permissive Norway—where in 1998 almost 50% of firstborn children were born to unmarried women—the prince’s choice of bride raised eyebrows....
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Haakon Earl (Norwegian ruler)
Norwegian noble who defeated Harald II Graycloak, becoming the chief ruler (c. 970) of Norway; he later extended his rule over the greater part of the country. He resisted an attempt by the Danish king Harald III Bluetooth to Christianize Norway and was the last non-Christian Norwegian ruler....
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Haakon I Adalsteinsfostre (king of Norway)
Norwegian king and one of the most eminent Scandinavian rulers of his time. He fostered the growth of governmental institutions but failed in his attempt to Christianize the lesser Norwegian chieftains....
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Haakon II Sigurdsson (king of Norway)
king of Norway (1157–62), illegitimate son of Sigurd Munn (d. 1155)....
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Haakon III Sverresson (king of Norway)
king of Norway (1202–04), the illegitimate son of King Sverre Sigurdsson....
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Haakon IV Haakonsson (king of Norway)
king of Norway (1217–63) who consolidated the power of the monarchy, patronized the arts, and established Norwegian sovereignty over Greenland and Iceland. His reign is considered the beginning of the “golden age” (1217–1319) in medieval Norwegian history....
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Haakon Magnus, Crown Prince (Norwegian prince)
heir apparent to the Norwegian throne, the only son of King Harald V and Queen Sonja....
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Haakon Magnusson the Elder (king of Norway)
king of Norway (1299–1319) whose anti-English foreign policy paved the way for the commercial domination of Norway by north German traders of the Hanseatic League. His reign marked the end of the “golden age” in medieval Norwegian ...
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Haakon Magnusson the Younger (king of Norway)
king of Norway (1355–80) whose marriage to Margaret, daughter of the Danish king Valdemar IV, in 1363 paved the way for the eventual union (1397) of the three major Scandinavian nations—Denmark, Norway, and Sweden—the Kalmar Union. Haakon was deeply embroiled throughout his reign in political conflicts w...
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Haakon Sigurdsson (Norwegian ruler)
Norwegian noble who defeated Harald II Graycloak, becoming the chief ruler (c. 970) of Norway; he later extended his rule over the greater part of the country. He resisted an attempt by the Danish king Harald III Bluetooth to Christianize Norway and was the last non-Christian Norwegian ruler....
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Haakon the Good (king of Norway)
Norwegian king and one of the most eminent Scandinavian rulers of his time. He fostered the growth of governmental institutions but failed in his attempt to Christianize the lesser Norwegian chieftains....
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Haakon the Old (king of Norway)
king of Norway (1217–63) who consolidated the power of the monarchy, patronized the arts, and established Norwegian sovereignty over Greenland and Iceland. His reign is considered the beginning of the “golden age” (1217–1319) in medieval Norwegian history....
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Haakon V Magnusson (king of Norway)
king of Norway (1299–1319) whose anti-English foreign policy paved the way for the commercial domination of Norway by north German traders of the Hanseatic League. His reign marked the end of the “golden age” in medieval Norwegian ...
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Haakon VI Magnusson (king of Norway)
king of Norway (1355–80) whose marriage to Margaret, daughter of the Danish king Valdemar IV, in 1363 paved the way for the eventual union (1397) of the three major Scandinavian nations—Denmark, Norway, and Sweden—the Kalmar Union. Haakon was deeply embroiled throughout his reign in political conflicts w...
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Haakon VII (king of Norway)
first king of Norway following the restoration of that country’s full independence in 1905....
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haangi (Maori oven)
...by the hongi, or pressing together of noses on greeting, and sometimes by ritual challenges; and cooking of food in earth ovens (haangi) on preheated stones. Carved houses, which serve as centres of meeting and ceremony in Maori villages, are still being erected....
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Haanja (region, Europe)
morainal region of southeastern Estonia. The moraine is steep on the north but slopes more gently toward the south, extending slightly into Latvia. Deeply incised valleys separate the hills, and there are many lakes. Haanja is the highest and most irregular part of Estonia. It reaches an elevation of 1,042 feet (318 m) at Mount Muna, the highest point in the republic; other high points are Mount ...
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Haanpää, Pentti (Finnish author)
Leading prose writers included Pentti Haanpää and Toivo Pekkanen, two autodidacts. In his short stories and novels, Haanpää observed with sharp irony and a keen sense of social justice the life of the rural poor, revealing himself as a skillful stylist who frequently criticized the army and the church, two sacrosanc...
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Haʿapai Group (islands, Tonga)
central island cluster of Tonga, in the South Pacific Ocean about 1,400 miles (2,300 km) north-northeast of Auckland, N.Z. Comprising some five dozen coral and volcanic islands and coral reefs, the group is dispers...
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Haar measure (mathematics)
Yet another setting for Lebesgue’s ideas was to be the theory of Lie groups. The Hungarian mathematician Alfréd Haar showed how to define the concept of measure so that functions defined on Lie groups could be integrated. This became a crucial part of Hermann Weyl’s way of representing a Lie group as acting linearly on the...
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Haardt Mountains (mountains, Germany)
mountain range in Rheinland-Pfalz Land (state), southwestern Germany. They comprise the eastern part of the Pfälzer Forest Mountains and lie west of the Rhine River basin, extending from the French border to a point about 20 miles (30 km) south of Mainz. Th...
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Haʾaretz (Israeli newspaper)
(Hebrew: “The Land”), newspaper published in Tel Aviv, Israel’s oldest daily and generally considered the country’s highest quality newspaper....
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Haarlem (The Netherlands)
gemeente (municipality), western Netherlands. It lies along the Spaarne River, 4.5 miles (7 km) from the North Sea, just west of Amsterdam. Haarlem was mentioned in the 10th century and by the 12th century had become a fortified town and the residence of the counts of Holland. It was chartered in 1245 and was ravaged in 1346 and 1351 during the civil wars in Holland. In 1492 it was capture...
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Haarlem Lake (polder, The Netherlands)
polder (area 45,700 acres [18,486 hectares]) coextensive with the gemeente (municipality) of Haarlemmermeer in western Netherlands. Originally, a number of lakes—with a combined area of about 14,000 acres (5,700 hectares) in 1531—were formed into one by successive inundations, and by the 1830s the water area had increased to nearly 45,000 acres (18,200 hectares). Floods freque...
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Haarlem Mannerists (group of artists)
...and incorporated in the United Netherlands, it entered a period of prosperity that reached its peak in the 17th century, when it was a refuge for Huguenots and an artistic centre. The Haarlem school of painting included Frans Hals, Salomon van Ruysdael, Jacob van Ruisdael, Philips Wouwerman, and Adriaen and Isack van Ostade. The important sculptor Claus Sluter was born in Haarlem,......
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Haarlem, Pieter Claesz van (Dutch painter)
Dutch painter who achieved a striking simplicity and atmospheric quality in still-life representations. Avoiding the crowded compositions and strong local colouring of the Mannerist tradition, he concentrated on the monochrome “breakfast piece,” the depiction of a simple meal set near the corner of a table. The play of light on the characteristic objects—a glass of wine, a kni...
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Haarlem school (group of artists)
...and incorporated in the United Netherlands, it entered a period of prosperity that reached its peak in the 17th century, when it was a refuge for Huguenots and an artistic centre. The Haarlem school of painting included Frans Hals, Salomon van Ruysdael, Jacob van Ruisdael, Philips Wouwerman, and Adriaen and Isack van Ostade. The important sculptor Claus Sluter was born in Haarlem,......
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Haarlemmermeer (The Netherlands)
gemeente (municipality), western Netherlands, occupying the reclaimed Haarlem Lake, which was drained between 1840 and 1852. There is a network of roads and ditches at right angles within the enclosing canal and dike. The population is concentrated in the villages of Hoofddorp, Nieuw-Vennep, Badhoevedorp, and Zwanenburg, which are situated along the dike and in the polder...
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Haarlemmermeer (polder, The Netherlands)
polder (area 45,700 acres [18,486 hectares]) coextensive with the gemeente (municipality) of Haarlemmermeer in western Netherlands. Originally, a number of lakes—with a combined area of about 14,000 acres (5,700 hectares) in 1531—were formed into one by successive inundations, and by the 1830s the water area had increased to nearly 45,000 acres (18,200 hectares). Floods freque...
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Haarsalz (mineral)
a sulfate mineral formed by sulfate solutions that attack aluminous minerals; alunogen is hydrated aluminum sulfate, formulated Al2(SO4)317H2O. It typically occurs as an efflorescence or crevice filling in pyrite-containing coal formations, shales, or slates, as well as in the gossan (weathered capping) of sulfide ...
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HAART (medicine)
Because HIV rapidly becomes resistant to any single antiretroviral drug, combination treatment is necessary for effective suppression of the virus. Highly active antiretroviral therapy (HAART), a combination of three or more RT and protease inhibitors, has resulted in a marked drop in the mortality rate from HIV infection in the United States and other industrialized states since its......
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Haas, Ernst (Austrian photographer)
Austrian-born photojournalist who was influential for his innovations in colour photography....
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Haas family (German harpsichord craftsmen)
...having only three registers and a rather darker tone than either French or Flemish instruments. The second German school was centred in the city of Hamburg and is best represented by the work of the Hass family. The Hass instruments are among the most elaborate ever made, in both decoration and complexity. They are the only 18th-century harpsichords with 16-foot and 2-foot registers, and some.....
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Haas Haus (building, Vienna, Austria)
...Pritzker Prize (1985). Hollein also designed the Museum of Modern Art (1991) in Frankfurt am Main, Ger., and the Haas Haus commercial complex (1985–90) in Vienna. The plans for the latter building, located next to St. Stephen’s Cathedral in the historical area of the city, met with firm resistance from......
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Haas, Karl (American musicologist and music broadcaster)
American musicologist and music broadcaster (b. Dec. 6, 1913, Speyer-am-Rhein, Ger.—d. Feb. 6, 2005, Royal Oak, Mich.), hosted a daily radio program, Adventures in Good Music, which he originated on a Detroit radio station in 1959. The show was syndicated nationally in 1970 and continued on the air until 2003. At times it was the most-listened-to classical music program in the world,...
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Haas, Mary R. (American linguist)
U.S. linguist. She studied with Edward Sapir at Yale University, where her dissertation was on Tunica, a moribund American Indian language. She continued her fieldwork on, and comparative studies of, American Indian languages...
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Haas, Mary Rosamond (American linguist)
U.S. linguist. She studied with Edward Sapir at Yale University, where her dissertation was on Tunica, a moribund American Indian language. She continued her fieldwork on, and comparative studies of, American Indian languages...
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Haas, Peter (American business executive)
American business executive (b. 1918, San Francisco, Calif.—d. Dec. 3, 2005, San Francisco), was a great-grandnephew of denim blue jean manufacturer Levi Strauss and helped build Levi Strauss & Co. into a globally recognized brand. Haas joined the family business in 1945 and throughout his career at Levi Strauss worked closely with his older brother, Walter. Haas served as president ...
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Haas, Richard (American artist)
...on which are depicted various cards and clippings with such verisimilitude that the viewer becomes convinced that they can be lifted off the painted rack. In the late 20th century, muralist Richard Haas painted the exteriors of entire buildings in trompe l’oeil, primarily in Chicago and New York City. Aaron Bohrod was one of the......
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Haas, Walter A. (American businessman)
American business executive credited with saving the foundering Levi Strauss & Co., the major manufacturer of “blue jean” denim pants. Haas’s efforts after World War II laid the groundwork for the company’s dramatic g...
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Haase, Helga
Squaw Valley featured the debut of the biathlon and of speed skating events for female contestants, with Helga Haase (Germany) capturing the first gold medal in the sport by winning the 500-metre race. Lidiya Skoblikova (U.S.S.R.) was the most successful female athlete at Squaw Valley, winning the 1,500- and 5,000-metre speed skating competitions. Figure skating was a family affair as David......
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