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 cause sleeping sickness. The hydrochloride and the less irritating base, ...
(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 of Argos. As an infant he was cast into the ...
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 tropical climate. Their natural vegetation is woodland, which in some ... [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 phytoplankton, consisting of acritarchs and blue-green algae, also diversified near ...
(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 skating and gymnastics, the acro skier performs a 90-second routine ...
(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 cycles, balls, barrels, tightropes, trampolines, and flying trapezes. [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 of the cranial sutures between the individual bones that make ... [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 Asia and Australia....
(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 gru palm (Acrocomia) and the coquito palm (Jubaea) in America. ...
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 copiously. The cause of the condition is unknown. Acrocyanosis is ... [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 enteropathica. Symptoms of zinc deficiency may include skin lesions, diarrhea, ...
(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 to the tooth-bearing bone, often to the crest of the ...
(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 as acrodynia, or "pink disease," is believed to be caused ...
(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 fats
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 real or metal drapery. Acroliths are known from the descriptions ...
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 pituitary gland. Acromegaly is often associated with the abnormal growth ... [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 ends in the acromion, a process that articulates with the ...
(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 Acromis sparsa climbs on top of her closely packed brood, ...
(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 foulbrood. In some instances it severely affects the colonies, but ...
(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 form the head. At the posterior end of the body ...
(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 as words and which often cease to be considered abbreviations. ...
(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 heights (acrophobia), confined spaces (claustrophobia), animals, insects, snakes, and flying ...
(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 higher levels (acrophylls), which are entirely or partly fertile in ...
(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 Acropolis is just up above, just under the stars.
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 act, the establishment of a local home for the gods ... [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. In 566 BC Peisistratus reorganized the Panathenaic Games in honour ...
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 role in the attempt to reconcile the Greek and Latin ... [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 cervicornis and A. palmata, and the herbivorous sea urchin
(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. palmata, and the herbivorous sea urchin Diadema ...
(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 below the tentacles. Attacks may result in the death of ...
(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 contact with an egg, the acrosome, which is a prominence ...
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," or "verse."
(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 by Acrostichum. Such sori probably arose by the fusion of ...
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 that stands on the pedestal. Originally a petal-shaped ornament with ...
(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; shell either contains phosphate or is punctate calcareous; pedicle opening ...
(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 other polymers that are now widely employed. In 1880 the ...
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 that is hard and transparent, soft and resilient, or a ... [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 enough to allow penetration by dyestuffs. Acrylic fibres 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 of watercolour and the density of oil paint. They are ... [1 Related Articles]
(from the article "chemical industry") Figure 3 also shows that acrylonitrile can be copolymerized with butadiene (roughly one-third acrylonitrile, two-thirds butadiene) to form nitrile rubber (NBR). This synthetic has different properties from other synthetics and is used for rubber hose, tank lining, conveyor belts, gaskets, ...
(from the article "electroplating") While nonmetallic materials have been plated since the mid-19th century, a period of rapid growth in the utilization of electroplated plastics began in 1963 with the introduction of ABS plastic (acrylonitrile-butadiene-styrene), which was readily plated. The plastic part is first ...
(from the article "Locke, John") ...and in assuring freedom of thought and expression. Locke himself drafted the arguments that his friend Edward Clarke used in the House of Commons in arguing for the repeal of the restrictive Act for the Regulation of Printing. The act ...
(from the article "Cromwell, Thomas, Earl of Essex, Baron Cromwell of Okeham") ...the act against the payment by bishops of their first year's revenue to Rome. He secured the submission of the clergy to the King in matters of legislation, and in 1533 he secured the passage of the Act in Restraint ...
(from the article "New Zealand") ...and made policy concessions to the Greens (6) in return for a pledge from the Greens to abstain on financial issues and votes of confidence. The opposition comprised the National Party (48 seats), ACT New Zealand (2), and the Maori ...
weight-driven wall clock with a large wooden, painted or lacquered dial. More correctly, it is called a tavern clock. Clocks of this type were displayed by innkeepers and got their name from the passage of a five-shilling duty on clocks ...
(from the article "extraterritoriality") ...is likewise of long standing. When, for example, during the reign of Queen Anne of Great Britain, the Russian ambassador was arrested for debt, an international incident ensued, and the famous Act Preserving the Privileges of Ambassadors (1708) was passed. ...
(from the article "Native American") ...the most momentous legal changes in the later 19th century included the creation of the Dominion of Canada (1867) and the passage of legislation including the Gradual Civilization Act (1857), the Act Providing for the Organisation of the Department of ...
(from the article "Utilitarianism") ...and a rule is judged useful or not by the consequences of its general practice. Mill has sometimes been interpreted as a "rule" Utilitarian, whereas Bentham and Sidgwick were "act" Utilitarians.
(Latin: "Acts"), in ancient Rome, minutes of public business and gazette of political and social events. They were in two forms: Acta Senatus and Acta diurna. [3 Related Articles]
in Greek mythology, son of the minor god Aristaeus and Autonoe (daughter of Cadmus, the founder of Thebes in Boeotia); he was a Boeotian hero and hunter. According to Ovid's Metamorphoses, Actaeon accidentally saw Artemis (goddess of wild animals, vegetation, ...
