(from the article "Ancestral Pueblo culture") ...boundaries of what are now the U.S. states of Arizona, New Mexico, Colorado, and Utah intersect. The descendents of the Ancestral Pueblo comprise the modern Pueblo tribes, including the Hopi, ...
Indian pueblo, Valencia county, west-central New Mexico, U.S. The pueblo lies 55 miles (89 km) west-southwest of Albuquerque and is known as the "Sky City." Its inhabitants live in terraced ...
(from the article "African spiny mouse") ...The Cairo spiny mouse has the most extensive distribution, extending from northern Africa to the Indus River; it lives near or with humans in some parts of its range. The ...
river in central Chile. It rises in the northwestern foothills of Mount Aconcagua of the Andes Mountains and flows westward from the Argentine border area to enter the Pacific Ocean ...
mountain in Argentina. It is commonly regarded as the highest summit in the Western Hemisphere, rising 22,834 feet (6,959 metres) above sea level. Aconcagua lies in the Southern Andes, its ... [7 Related Articles]
(from the article "metabolism") ...to cis-aconitate in such a way that isocitrate is formed. It is probable that all three reactants-citrate, cis-aconitate, and isocitrate-remain closely associated with aconitase, the enzyme that catalyzes the isomerization ...
(from the article "metabolism") ...(i.e., a rearrangement of certain atoms comprising the molecule) to form isocitrate [39]. The reaction involves first the removal of the elements of water from citrate to form cis-aconitate, and ...
(from the article "aconite") any member of two genera of perennial herbs of the buttercup family (Ranunculaceae): Aconitum, consisting of summer-flowering poisonous plants (see monkshood), and Eranthis, consisting of spring-flowering ornamentals (see winter aconite).Manchurian ...
(from the article "monkshood") A few species are cultivated in gardens, including A. henryi, A. carmichaelii, and A. uncinatum. All species contain the powerful poison aconitine. The common monkshood, or friar's cap (A. napellus), ...
(from the article "Tucuman") provincia (province), northwestern Argentina. The western fringe of the province is occupied by the Sierra del Aconquija, which consists of northeast-southwest-trending outlying ridges of the Andes with ...
in Greek legend, a beautiful youth of the island of Ceos. During the festival of Artemis at Delos, Acontius saw and loved Cydippe, a girl of a rich and noble ...
the sweet flag order of flowering plants and the most basal lineage among the monocotyledons (monocots), which are characterized by having a single seed leaf. This order contains the single ...
(from the article "oak") Acorns provide food for small game animals and are used to fatten swine and poultry. Red- and white-oak lumber is used in construction, flooring, furniture, millwork, cooperage, and the production ...
any of approximately 45 species of weevils in the family Curculionidae (order Coleoptera) that have extremely long and slender snouts, which in females can be almost twice the length of ...
(from the article "acorn and nut weevil") any of approximately 45 species of weevils in the family Curculionidae (order Coleoptera) that have extremely long and slender snouts, which in females can be almost twice the length of ...
(from the article "woodpecker") The acorn woodpecker (M. formicivorus) is about 20 cm (8 inches) long and is found from the deciduous woodlands of western North America south to Colombia. It ...
any of the soft-bodied invertebrates of the class Enteropneusta, phylum Hemichordata. The front end of these animals is shaped like an acorn, hence their common name. The "acorn" consists of ... [3 Related Articles]
(from the article "Acorales") ...plants and the most basal lineage among the monocotyledons (monocots), which are characterized by having a single seed leaf. This order contains the single family Acoraceae and one genus (Acorus), ...
in philosophy, the view that God is the sole and ultimate reality and that finite objects and events have no independent existence. Acosmism has been equated with pantheism, the belief ... [1 Related Articles]
(from the article "Performing Arts") ...toured with the title Elsinore), based very loosely on the story of Hamlet. Other notable events were a gala to celebrate the 80th birthday of Yury Grigorovich, the debut of ...
Jesuit theologian and missionary to the New World, chiefly known for his Historia natural y moral de las Indias, the earliest survey of the New World and its relation to ...
freethinking rationalist who became an example among Jews of one martyred by the intolerance of his own religious community. He is sometimes cited as a forerunner of the renowned philosopher ... [1 Related Articles]
either of two species of South American rodents that resemble the small tropical-forest-dwelling hoofed animals of Africa and Asia (see royal antelope; chevrotain). Weighing 1 to 1.5 kg (2.2 to ... [1 Related Articles]
(from the article "Pythagoreanism") ..."something heard," viz., the esoteric teachings) and mathematikoi (Greek: mathematikos, "scientific"), may have occurred at that time. The acousmatics devoted themselves to the observance of rituals and rules and to ...
(from the article "Absorption coefficients of common materials at several frequencies") In addition to the geometric decrease in intensity caused by the inverse square law, a small part of a sound wave is lost to the air or other medium through ...
(from the article "ear, human") ...an actual measurement of the acoustic impedance of the ear, representing the state of the ossicular chain and the mobility of the tympanic membrane. This information can be obtained by ...
(from the article "sonar") ...the target (such as a ship, submarine, or torpedo). Waveforms thus detected may be analyzed for identifying characteristics as well as direction and distance. The third category of sonar devices ...
(from the article "ultrasonics") Structural flaws in materials can also be studied by subjecting the materials to stress and looking for acoustic emissions as the materials are stressed. Acoustic emission, the general name for ...
(from the article "gas meter") Acoustic gas meters measure the rate of gas flow by comparing the frequency shifts of two initially identical signals (one sent upstream, the other downstream) after they are reflected.
absorption of sound in a medium, equal to the ratio of the sound pressure at a boundary surface to the sound flux (flow velocity of the particles or volume velocity, ... [4 Related Articles]
device for measuring the velocity and absorption of sound waves in a gas or liquid. A vibrating crystal creates the waves that are radiated continuously into the fluid medium, striking ...
(from the article "microscope") In the early 1940s Soviet physicist Sergei Y. Sokolov proposed the use of ultrasound in a microscope and showed that sound waves with a frequency of 3,000 megahertz (MHz) would ...
(from the article "mine") ...circuit in the other chamber to explode the mine. The pressure mine reacts only to a pressure change produced by a ship larger than a minesweeper (q.v.), thus making it ...
benign tumour on the vestibulocochlear nerve (also called acoustic nerve) near its point of entry into the inner ear. The tumour, though benign, may spread into the brain cavity if ... [1 Related Articles]
(from the article "sound") The unit of specific acoustic impedance is the pascal second per metre, often called the rayl, after Lord Rayleigh. The unit of acoustic impedance is the pascal second per cubic ...
(from the article "scansion") ...eighth notes for unstressed syllables, quarter or half notes for stressed syllables, and musical rests for pauses) record accentual differences. Machines such as the oscillograph are used by modern acoustic ...
(from the article "nervous system") ...thousands of axons. Another example is the ear of a noctuid moth. Each ear is essentially a tympanic membrane forming the outer wall of an air-filled cavity in the thorax. ...
(from the article "electromechanical transducer") ...horn, or other enclosure in order to separate the waves from the front and the rear of the loudspeaker and thereby prevent them from canceling each other. The most common ...
physiological changes in the body caused by sound waves. Sound waves cause variations in pressure, the intensity of which depends upon the range of oscillation, the force exerting the sound, ...
(from the article "theatre") Much recent study has centred on the problem of acoustics in the ancient theatre. The difficulty in achieving audibility to an audience of thousands, disposed around three-fifths to two-thirds of ...
(from the article "acoustics") Acoustic shadows, regions in which some frequency regions of sound are attenuated, can be caused by diffraction effects as the sound wave passes around large pillars and corners or underneath ...
(from the article "mechanoreception") ...(the labyrinth) arise. The common embryologic origin and structural similarities of mature neuromasts and labyrinthine cell groups have led to the designation of all of these organs as the acoustico-lateralis ...
the science concerned with the production, control, transmission, reception, and effects of sound. The term is derived from the Greek akoustos, meaning "hearing." [11 Related Articles]
(from the article "personality assessment") Much study has been given to the ways in which response sets and test-taking attitudes influence behaviour on the MMPI and other personality measures. The response set called acquiescence, for ...
in biology, modification in structure or function acquired by an organism during its life, caused by environmental factors. With respect to higher organisms, there is no evidence that such changes ... [3 Related Articles]
(from the article "Christianity") ...whether mystical contemplation was the goal of all Christians or a special grace offered only to a few. The discrimination of the various forms of prayer and the distinction between ...
(from the article "Burnet, Sir Macfarlane") Australian physician, immunologist, and virologist who, with Sir Peter Medawar, was awarded the 1960 Nobel Prize for Physiology or Medicine for the discovery of acquired immunological tolerance, the concept on ...
(from the article "megacolon") massive enlargement and dilation of the large intestine (colon). The two main types of the syndrome are congenital megacolon, or Hirschsprung disease, and acquired megacolon. In congenital megacolon, the lowermost ...
(from the article "ptosis") Acquired ptosis has many potential causes, but it is usually due to age-related stretching or displacement of the fibres connecting the levator palpebrae superioris muscle to structures within the upper ...
(from the article "strabismus") ...the causes undoubtedly have some genetic component. While congenital strabismus is more common in children with birth-related problems, most affected children are otherwise neurologically normal. Acquired strabismus appears later in ...
(from the article "memory") In the course of a typical day, humans receive a continuous stream of information from the world around them as well as from their own thought processes and physical experiences. ...
in criminal law, acknowledgment by the court of the innocence of the defendant or defendants. Such a judgment may be made by a jury in a trial or by a ...
(from the article "lepidopteran") ...Morphinae are Neotropical, as are the highly distasteful, aposematic Heliconiinae and Ithomiinae that, with the worldwide Danainae, are models in many mimicry complexes; most of the pantropical Acraeinae are also ...
(from the article "Acrasieae") class name for cellular slime molds (division Myxomycophyta). The class contains a single order, Acrasiales, and about a dozen species. The vegetative phase of these slime molds consists of amoeba-like ...
class name for cellular slime molds (division Myxomycophyta). The class contains a single order, Acrasiales, and about a dozen species. The vegetative phase of these slime molds consists of amoeba-like ... [1 Related Articles]
westernmost estado (state) of Brazil. Acre covers the southwesternmost part of Brazil's Hileia (Hylea), the forest zone of the Amazon River basin. Bounded north by Amazonas state, ... [1 Related Articles]
unit of land measurement in the British Imperial and United States Customary systems, equal to 43,560 square feet, or 160 square rods. One acre is equivalent to 0.4047 hectares (4,047 ... [2 Related Articles]
river, chiefly in western Brazil, rising on the Peruvian border, along which it continues eastward to form part of the Brazil-Bolivia border. Turning north at Brasileia, the remainder of its ... [1 Related Articles]
(from the article "Palestine") Coastal lowlands of varying widths front the Mediterranean. The most northerly is the Plain of 'Akko (Acre), which extends with a breadth of 5 to 9 miles (8 to 14 ...
dye obtained from coal tar, introduced as an antiseptic in 1912 by the German medical-research worker Paul Ehrlich and used extensively in World War I to kill the parasites that ...
(from the article "Perseus") in Greek mythology, the slayer of the Gorgon Medusa and the rescuer of Andromeda from a sea monster. Perseus was the son of Zeus and Danae, the daughter of Acrisius ...
one of the 30 soil groups in the classification system of the Food and Agriculture Organization (FAO). Acrisols form on old landscapes that have an undulating topography and a humid ... [1 Related Articles]
(from the article "Cambrian Period") ...(0.8 inch) in diameter and were probably more than 1 metre (3.3 feet) in height. Such large size is attained by modern green algae only in warm, equatorial oceans. The ...
(from the article "skiing") Freestyle skiing focuses on acrobatics and includes three events: acro, aerials, and moguls. Formerly known as ballet, acro was invented in the early 1930s in Europe. Utilizing moves from figure ...
(Greek: "to walk on tip-toe," or "to climb up"), the specialized and ancient art of jumping, tumbling, and balancing, often later with the use of such apparatus as poles, one-wheel ... [3 Related Articles]
(from the article "marsupial") 3 species in 2 genera. Related to the koala (family Phascolarctidae).2 species in 2 genera. Tiny arboreal nectar feeders....
congenital malformation of the skeleton affecting the skull and limbs. The disorder most often is hereditary, but it may appear spontaneously. The head appears pointed (acrocephaly) because of premature closing ... [2 Related Articles]
(from the article "snake") ...extinct, both from Mauritius. Maxilla divided into two elements, a condition unique among vertebrates. Pelvic vestiges absent. Lays eggs. 3 species in 1 genus from Southeast ...
(from the article "palm") ...urens), the nipa palm, and the gebang and talipot palms (Corypha elata and C. umbraculifera). Wine is made from species of the raffia palm in Africa and from the gru ...
bluish discoloration of the hands caused by spasms in arterioles (small arteries) of the skin. Less commonly, the feet are affected. The fingers or toes are usually cold and sweat ... [1 Related Articles]
(from the article "nutritional disease") ...of zinc, iron, and other minerals. Severe zinc deficiency has also been described in patients fed intravenous solutions inadequate in zinc and in the inherited zinc-responsive syndrome known as acrodermatitis ...
(from the article "lizard") The common mode of tooth implantation is pleurodonty, in which the teeth are fused to the inner side of the labial wall. In the other mode, acrodonty, teeth are fused ...
(from the article "mercury poisoning") ...or the long-term ingestion of calomel (mercurous chloride, a cathartic) may produce fever, rash, and enlargement of the spleen and lymph nodes. In infants and young children, a disorder known ...
(from the article "aldehyde") As another example, the common name of CH2&doublehorzbond;CHCHO, for which the IUPAC name is 2-propenal, is acrolein, a name derived from that of acrylic acid, the parent carboxylic acid.properties of ...
statue, especially ancient Greek, in which the trunk of the figure was of wood and the head, hands, and feet of marble. The wood was either gilded or covered by ...
growth and metabolic disorder characterized by enlargement of the skeletal extremities. It is the result of overproduction of pituitary growth hormone (somatotropin) after maturity, caused by a tumour of the ... [7 Related Articles]
(from the article "scapula") ...spine, which divides the bone into two concave areas, the supraspinous and infraspinous fossae. The spine and fossae give attachment to muscles that act in rotating the arm. The spine ...
(from the article "tortoise beetle") ...Some species have evolved strategies to counteract the low survival rate that results. Maternal guarding, a rare behaviour among beetles, is known in four of these species. The female of ...
(from the article "beekeeping") European foulbrood is caused by a nonsporeforming bacterium, Streptococcus pluton, but Bacillus alvie and Acromobacter eurydice are often associated with Streptococcus pluton. This disease is similar in appearance to American ...
(from the article "crustacean") At the front, or anterior end, of the body there is an unsegmented, presegmental region called the acron. In most crustaceans at least four somites fuse with the acron to ...
(from the article "abbreviation") The combination of the first syllables or letters of component words within phrases or within names having more than one word is common and often produces acronyms, which are pronounced ...
(from the article "diagnosis") ...person recognizes the fear as excessive or unreasonable but cannot control the anxiety associated with it. Agoraphobia is one of the most severe phobias. Other phobias include the fear of ...
(from the article "fern") ...climbers that originate upon the ground and grow up tree trunks. In these the lower leaves (bathyphylls) are usually vegetative and are often different in form from those at the ...
(from the article "Athens") ...guitar. The taverna signs are multilingual, and the ubiquitous kitchen chair is being replaced by the plastic-ribbed restaurant seat. Progress laps at the Plaka like a vengeful sea, but the ...
central, defensively oriented district in ancient Greek cities, located on the highest ground and containing the chief municipal and religious buildings. Because the founding of a city was a religious ... [5 Related Articles]
(from the article "Athens") ...large-scale sculpture in gaily coloured, porous limestone, representing groups of lions bringing down bulls, and with snaky-tailed monsters in the angles. These sculptures are now displayed in the Acropolis Museum. ...
Byzantine scholar and statesman, the author of Chronike Syngraphe ("Written Chronicle"), a history of the Byzantine Empire from 1203 to 1261. He also played a major diplomatic ... [2 Related Articles]
(from the article "conservation") ...affected, with successive waves of disease propagating throughout the region in recent decades. The result has been large declines in two species of major reef-building corals, Acropora ...
(from the article "conservation") ...waves of disease propagating throughout the region in recent decades. The result has been large declines in two species of major reef-building corals, Acropora cervicornis and A. ...
(from the article "cnidarian") ...others, primarily those of their own species. When members of one clone encounter those of another, the two combatants inflate and slap one another with nematocyst-studded fighting structures (acrorhagi) located ...
(from the article "fertilization") The acrosome reaction of spermatozoa is a prerequisite for the association between a spermatozoon and an egg, which occurs through fusion of their plasma membranes. After a spermatozoon comes in ...
short verse composition, so constructed that the initial letters of the lines, taken consecutively, form words. The term is derived from the Greek words akros, "at the end," and stichos,"line," ...
(from the article "fern") ...naked sori (i.e., without an indusium) are found in Polypodium. (4) An arrangement of large sori that usually expand over the entire undersurface of the blade or pinna is represented ...
in architecture, decorative pedestal for an ornament or statue placed atop the pediment of a Greek temple; the term has also been extended to refer to the statue or ornament ...
(from the article "lamp shells") ...surface apical, or located at the tip, in both valves; fleshy pedicle emerging between the valves at the tapered end; about 51 genera; Cambrian to Recent.Usually circular in outline; ...
(from the article "industrial polymers, major") Acrylic is a generic term denoting derivatives of acrylic and methacrylic acid, including acrylic esters and compounds containing nitrile and amide groups. Polymers based on acrylics were discovered before many ...
any of a class of synthetic plastics, resins, and oils used to manufacture many products. By varying the starting reagents and the process of forming, a material may be produced ... [2 Related Articles]
(from the article "industrial polymers, major") ...On the other hand, a copolymer containing PAN and 2 to 7 percent of a vinyl comonomer such as vinyl acetate can be readily spun to fibres that are soft ...
painting executed in the medium of synthetic acrylic resins. Acrylics dry rapidly, serve as a vehicle for any kind of pigment, and are capable of giving both the transparent brilliance ... [1 Related Articles]
