(from the article "anion") atom or group of atoms carrying a negative electric charge. See ion.CHEMICAL FORMULAsynthesis of organic moleculesanion channel
(from the article "nervous system") There may be channels that pass anions such as Cl−, but their existence is difficult to prove. Single-channel recordings of cultured tissue have shown selective Cl− channels that are voltage dependent and of high conductance. Channels with lower conductance have been demonstrated in reconstituted artificial membranes as well as in ...
(from the article "clay mineral") Depending on deficiency in the positive or negative charge balance (locally or overall) of mineral structures, clay minerals are able to adsorb certain cations and anions and retain them around the outside of the structural unit in an exchangeable state, generally without affecting the basic silicate structure. These adsorbed ions ...
(from the article "separation and purification") ...a finely divided, insoluble substance (the ion exchanger, usually a synthetic resin). In a cation-exchange resin all the sites are negatively charged, so that only positive ions can be separated; an anion-exchange resin has positively charged sites. Ion-exchange chromatography has become one of the most important methods for separating proteins ...
(from the article "soap and detergent") Anionic detergents (including soap and the largest portion of modern synthetic detergents), which produce electrically negative colloidal ions in solution.Cationic detergents, which produce electrically positive ions in solution.Nonionic detergents, which produce electrically neutral colloidal particles in...soap and detergentAnionic detergentsAmong synthetic ...
(from the article "Indian philosophy") ...has never been as important as for the Hindu mind. Most Indian philosophies assume that moksa is possible, and the "impossibility of moksa"(anirmoksa) is regarded as a material fallacy likely to vitiate a philosophical theory.
(from the article "Indian philosophy") ...and the Tattva-kaumudi by Vacaspati (9th century). The Samkhya-sutras are a much later work (c. 14th century) on which Aniruddha (15th century) wrote a Indian philosophyVaisnava schools...and strength predominate (known as Samkarsana); the form in which wealth and courage predominate ...
(from the article "absinthe") ...for export to those countries prohibiting true absinthe. Beverages developed as substitutes, similar in taste but lower in alcohol content and without wormwood, are known by such names as Pernod, anis (or anisette), pastis, ouzo, or raki.
(Pimpinella anisum), annual herb of the parsley family (Apiaceae, or Umbelliferae), cultivated chiefly for its fruits, called aniseed, the flavour of which resembles that of licorice. The plant, up to 0.75 m (2.5 feet) tall, has long-stalked basal leaves and shorter, stalked stem leaves. Its small, yellowish white flowers form ...
(from the article "Uses of spices and herbs with foods") (Pimpinella anisum), annual herb of the parsley family (Apiaceae, or Umbelliferae), cultivated chiefly for its fruits, called aniseed, the flavour of which resembles that of licorice. The plant, up to 0.75 m (2.5 feet) tall, has long-stalked basal leaves and shorter, stalked stem leaves. Its small, yellowish white flowers form ...
lowermost of two divisions of the Middle Triassic Series, representing those rocks deposited worldwide during Anisian time (245 million to 237 million years ago) in the Triassic Period. The stage name is derived from an area of limestone formations along the Anisus River at Grossreifling in the Austrian Alps. The ...
(from the article "psittaciform") ...feet and bill. Most birds have the four toes arranged with three directed forward-the inner (II), middle (III), and outer (IV)-and one backward, the hallux (I). This condition, called anisodactyl, literally means "without equal toes," referring to the unequal arrangement. Parrots have two toes (the inner and middle) directed forward ...
(from the article "chemical compound") ...of organic substances, contains five fused benzene rings. Like several other polycyclic aromatic hydrocarbons, it is carcinogenic. Aromatic compounds are widely distributed in nature. Benzaldehyde, anisole, and vanillin, for example, have pleasant aromas.
(from the article "fungus") ...can survive in soil for long periods of time; thick-walled oogonia; may lack haustoria; example genera include Sclerospora and Verrucalvus.Found in marine environments, parasitic; example genus is Anisolpidium.
poetic verse that does not have equal or corresponding poetic metres. An anisometric stanza is composed of lines of unequal metrical length, as in William Wordsworth's "Ode: Intimations of Immortality," which beginsThere was a time when meadow, grove, and stream,The earth, and every common sight,To me did seemAppareled in celestial ...
(from the article "orthopteran") Man may handle most walking sticks safely, but a large, heavily bodied species in the southeastern U.S. (Anisomorpha buprestoides) sometimes forcibly ejects a milky fluid that is extremely irritating if introduced into the human eye. This species has a pair of circular pores on the thorax leading to reservoirs of ...
(from the article "bivalve") ...In such cases the shell is typically smooth, although calcareous encrustations on the posterior shell protect the borer from aperture-attacking predators. Reduction of the anterior adductor (the anisomyarian form) creates a triangular-shaped shell, as in the buried fan shell Pinna (Pinnidae) and the mussels (Mytilidae) of rocky coasts. Although such ...
(from the article "Cucurbitales") Members of Anisophylleaceae are evergreen trees or shrubs found scattered through the tropics. There are 4 genera and 34 species in the family. Anisophyllea (30 species) is pantropical. The leaves are borne in two main ranks on the stem and are often unequal in size. The flowers are small and ...
(from the article "Cucurbitales") Members of Anisophylleaceae are evergreen trees or shrubs found scattered through the tropics. There are 4 genera and 34 species in the family. Anisophyllea (30 species) is pantropical. The leaves are borne in two main ranks on the stem and are often unequal in size. The flowers are small and ...
(from the article "lycophyte") ...readily seen in clambering species. Morphologically, the rhizophore is considered to be a root, although on occasion it can give rise to leafy branches if the normally leafy branches are cut off. Anisophylly (the occurrence of two sizes of leaves) occurs in most species of Selaginella, especially those of the ...
(from the article "plant") In anisosporous life histories, an unusual phenomenon in bryophytes, there is a size difference among spores produced in the same sporangium. Each meiotic division results in a tetrad of two small spores that produce male gametophytes and two larger spores that produce female gametophytes.
in physics, the quality of exhibiting properties with different values when measured along axes in different directions. Anisotropy is most easily observed in single crystals of solid elements or compounds, in which atoms, ions, or molecules are arranged in regular lattices. In contrast, the random distribution of particles in liquids, ... [12 Related Articles]
(from the article "Bogazkoy") ...were in the lower city. The town extended up to Buyukkale, probably culminating in the palace of the local king. Both this town and the merchants' houses were destroyed, probably by King Anittas of Kussara (after 1800). A Hittite text ascribed to Anittas tells of his conquests in Anatolia and ...
in Greek mythology, the son of the god Apollo and of Rhoeo, who was herself a descendant of the god Dionysus. Rhoeo, when pregnant, had been placed in a chest and cast into the sea by her father; floating to the island of Delos, the birthplace of Apollo, she gave ...
(1788-89), a conspiracy of Swedish and Finnish army officers that undermined the Swedish war effort in the Russo-Swedish War of 1788-90. Shortly after the outbreak of war, 113 officers in the Finnish town of Anjala dispatched a letter to Empress Catherine II the Great of Russia calling for peace on ... [2 Related Articles]
(from the article "mudra") ...figure illustrates some of the major mudras.) Although pictorial mudras are used most commonly in portraying the Buddha, they can also appear in representations of lesser personages. The anjali ("reverence") mudra, for example, which has the suppliant or worshiper joining his two hands before him, palm to palm, slightly cupped, ...
city, Aichi ken (prefecture), Honshu, Japan, in the middle of the Hekkai Terrace. Irrigation was introduced into the area in the late 19th century, permitting cultivation of two crops of rice and wheat annually. In 1891 the Anjo station on the railroad between Tokyo and Kobe was opened, and the ...
historical and cultural region encompassing the western French departement of Maine-et-Loire and coextensive with the former province of Anjou. The former province of Anjou also encompassed the regions of La Fleche and Chateau-Gontier. [1 Related Articles]
fourth and youngest son of Henry II of France and Catherine de Medicis; his three brothers-Francis II, Charles IX, and Henry III-were kings of France. But for his early death at age 30, he too would have been king. [4 Related Articles]
(from the article "Literature") The perils of such literary ambitions by women became apparent when in November a 25-year-old Afghan poet named Nadia Anjuman was beaten to death by her husband, only a few days after Gul-i dudi ("Dark-Colored Flower"), her first book of verse, rolled off the press. Two months earlier the BBC ...
(from the article "Tabataba'i, Sayyid Zia od-Din") ...In 1919 he led a quasi-diplomatic mission to negotiate a commercial agreement with the anti-Communist Russian revolutionaries at Baku. On his return to Iran he joined a secret nationalist society, Anjuman-i Fulad ("The Steel Committee"), created a coalition of anticommunist politicians, and masterminded the coup d'etat of Feb. 21/22, 1921, ...
city in southeastern Shaanxi sheng (province), China. It is situated in the narrow valley of the Han River between the Qin (Tsinling) and Daba mountain ranges and has been an important trade centre since antiquity.
capital of Turkey, in the northwestern part of the country. It lies about 125 miles (200 km) south of the Black Sea, near the confluence of the Hatip, Ince Su, and Cubek streams. [6 Related Articles]
(July 20, 1402), military confrontation in which forces of the Ottoman sultan Bayezid I were defeated by those of the Central Asian ruler Timur (Tamerlane) and which resulted in the collapse of Bayezid's empire. [2 Related Articles]
(Oct. 20, 1921), pact between the government of France and the Grand National Assembly of Turkey at Ankara, signed by the French diplomat Henri Franklin-Bouillon and Yusuf Kemal Bey, the Turkish nationalist foreign minister. It formalized the de facto recognition by France of the Grand National Assembly, rather than the ... [1 Related Articles]
volcanic mountainous region in central Madagascar (Malagasy), covering an area of approximately 2,000 square miles (5,200 square km) and rising to 8,671 feet (2,643 m) in Mount Tsiafajavona, the nation's second highest peak. The main range runs south-southwest from the town of Antananarivo. Antsirabe (q.v.), situated on the slopes of ... [1 Related Articles]
(from the article "totemism") Another member of the same school, Bernhard Ankermann, in 1915-16 championed the view that all totemisms, regardless of where they are found, contained a common kernel around which new characteristics are built. As seen from the standpoint of what was found in Africa, this kernel appeared to him to be ...
ancient Egyptian hieroglyph signifying "life," a cross surmounted by a loop and known in Latin as a crux ansata (ansate, or handle-shaped, cross). As a vivifying talisman, the ankh is often held or offered by gods and pharaohs. The form of the symbol derives from a sandal ... [2 Related Articles]
(from the article "Egypt, ancient") ...for example, a local ruler called Khety styled himself in a regal manner and built a pyramid with a surrounding "courtly" cemetery. At Al-Mi'alla, south of Luxor, Ankhtify, the nomarch of the al-Jabalayn region, recorded his annexation of the Idfu nome and extensive raiding in the Theban area. Ankhtify acknowledged ...
in humans, hinge-type, freely moving synovial joint between the foot and leg. The ankle contains seven tarsal bones that articulate (connect) with each other, with the metatarsal bones of the foot, and with the bones of the lower leg. The articulation of one of the tarsal bones, the ankle bone ... [5 Related Articles]
in jewelry, bracelet worn around the ankle. Ornamental anklets have been worn for centuries, particularly in the East. Jewelry found in Persia and dating from the end of the 2nd millennium to the 7th century BC includes anklets, some decorated with animals such as an ibex with curving horns. Anklets ...
river in southern Ghana, western Africa. Rising northeast of Wiawso, it flows about 120 miles (190 km) south to the Gulf of Guinea (Atlantic) just west of Axim, commercial centre of the river basin. Its chief tributaries are the Mansi and the Bonsa rivers, and much of its basin is ...
(from the article "dinosaur") The ankylosaurs are known from the Late Jurassic and Cretaceous periods. They are called "armoured dinosaurs" for their extensive mosaic of small and large interlocking bony plates that completely encased the back and flanks. Most ankylosaurs, such as Euoplocephalus, Nodosaurus, and
armoured ornithischian dinosaurs that lived 70 million to 65 million years ago in North America during the Late Cretaceous Period. Ankylosaurus is a genus belonging to a larger group (infraorder Ankylosauria) of related four-legged, herbivorous, heavily armoured dinosaurs that flourished throughout the Cretaceous Period (144 million to 65 million years ...
(from the article "spondylitis") inflammation of one or more of the vertebrae. Spondylitis takes several forms; the most widely occurring forms are ankylosing spondylitis, hypertrophic spondylitis, and tuberculous spondylitis.characteristicsjoint diseaseRheumatoid arthritis and allied disorders...of bone. Another type of arthritis is
city, seat (1826) of Washtenaw county, southeastern Michigan, U.S. It is located on the Huron River, about 35 miles (55 km) west of Detroit. John Allen and Elisha W. Rumsey founded the community in 1824, which they named for their wives (both called Ann) and the local natural groves, or ...
cape on the Atlantic Ocean comprising the eastern extremity of Essex county, northeastern Massachusetts, U.S., 30 miles (48 km) northeast of Boston. Sheltering Ipswich Bay, it is indented by Annisquam Harbor on the north and Gloucester Harbor on the south. The tidal Annisquam River, a 4-mile- (6.4-km-) long navigable waterway, ...
