| | - fibrinolytic drug
- (from the article "drug") A fibrinolytic system that exists in the body restricts thrombus propagation beyond the site of injury and is also involved in the lysis, or dissolution, of clots as wounds heal. The fibrinolytic system degrades fibrin and fibrinogen to products that ...
- fibrinolytic system
- (from the article "drug") A fibrinolytic system that exists in the body restricts thrombus propagation beyond the site of injury and is also involved in the lysis, or dissolution, of clots as wounds heal. The fibrinolytic system degrades fibrin and fibrinogen to products that ...
- fibrinopeptide
- (from the article "evolution") Proteins that evolve more rapidly than cytochrome c can be studied in order to establish phylogenetic relationships between closely related species. Some proteins evolve very fast; the fibrinopeptides-small proteins involved in the blood-clotting process-are suitable for reconstructing the phylogeny of ...
- fibroblast
- the principal nonmotile cells of connective tissue; fibroblasts are large, flat, elongated (spindle-shaped) cells possessing processes extending out from the ends of the cell body. The cell nucleus is flat and oval. Fibroblasts produce tropocollagen, which is the forerunner of ... [6 Related Articles]
- fibrocartilage
- (from the article "cartilage") ...at the ends of bones in free-moving joints as articular cartilage, at the ends of the ribs, and in the nose, larynx, trachea, and bronchi. It is a glossy blue-white in appearance and very resilient. Fibrocartilage is the tough, very ...
- fibrocystic disease of the breast
- noncancerous cysts (harmless swellings caused by fluid trapped in breast tissues) that often increase in size and become tender during the premenstrual phase of the menstrual cycle. This condition occurs most often in women between the ages of 30 and ... [2 Related Articles]
- fibrocyte
- (from the article "ligament") ...to support the internal organs and hold bones together in proper articulation at the joints. A ligament is composed of dense fibrous bundles of collagenous fibres and spindle-shaped cells known as fibrocytes, with little ground substance (a gel-like component of ...
- fibroelastosis
- (from the article "cardiovascular disease") ...in the myocardium-for example, tumours-may be present at birth, but they are rare. Abnormalities of the endocardium may be present at birth, but they are also rare. They include fibroelastosis, a disease in which the endocardium develops a thick fibrous ...
- fibroid tumour
- (from the article "reproductive system disease") Uterine fibroids, also called uterine leiomyomata, are benign tumours that originate from the smooth muscle walls of the uterus and may be single but usually occur in clusters. They are most common in women of African descent and in women ...
- fibroin
- (from the article "scleroprotein") The two most important classes of scleroproteins are the collagens and the keratins. Others include fibroin, which forms about 67 percent of the content of natural silk (the remainder is the protein sericin); elastin, a structural protein of elastic fibres ...
- fibroma
- any benign tumour of fibrous tissue. Specific fibromas include nonossifying fibroma, found in the large long bones; it is relatively common in older children and young adults. Fibromas can occur in many areas of the body (e.g., ovaries, nerves) and ...
- fibromyalgia
- chronic syndrome that is characterized by musculoskeletal pain, often at multiple anatomical sites, that occurs in the absence of an identifiable physical or physiological cause. A significant number of persons with fibromyalgia also have mental disorders, especially depression. Fibromyalgia is ...
- fibrosarcoma
- rare malignant tumour of fibrous tissue most commonly found in middle-age adults and primarily occurring in the thighbone, upper arm bone, or jaw; the tumour also may arise in soft tissues and organs. The mass is detectable by palpation before ...
- fibrosis
- (from the article "silicosis") The symptoms of silicosis are shortness of breath that is followed by coughing, difficulty in breathing, and weakness. These symptoms are all related to a fibrosis that reduces the elasticity of the lung. In the actual disease process, the tiny ...
- fibrous actin
- (from the article "muscle") ...in this form, called globular actin or G-actin, has one calcium or magnesium ion and one molecule of ATP bound to it. Under the proper conditions, G-actin is transformed into the fibrous form, or F-actin, that exists in the thin ...
- fibrous astrocyte
- (from the article "nervous system") Fibrous astrocytes are prevalent among myelinated nerve fibres in the white matter of the central nervous system. Organelles seen in the somata of neurons are also seen in astrocytes, but they appear to be much sparser. These cells are characterized ...
- fibrous dysplasia
- rare congenital developmental disorder beginning in childhood and characterized by replacement of solid calcified bone with fibrous tissue, often only on one side of the body and primarily in the long bones and pelvis. One bone (monostotic) or several bones ... [1 Related Articles]
- fibrous joint
- (from the article "joint") In fibrous joints the articulating parts are separated by white connective tissue (collagen) fibres, which pass from one part to the other. There are two types of fibrous joints: suture and gomphosis.suture
- fibrous pericardium
- (from the article "human cardiovascular system") The heart is suspended in its own membranous sac, the pericardium. The strong outer portion of the sac, or fibrous pericardium, is firmly attached to the diaphragm below, the mediastinal pleura on the side, and the sternum in front. It ...
- fibrous protein
- (from the article "protein") ...very complicated, apparently irregular shapes. Two extremes in shape include the closely folded structure of the globular proteins and the elongated, unidimensional structure of the threadlike fibrous proteins; both were recognized many years before the technique of X-ray diffraction was ...
- fibrous root system
- (from the article "root") Grasses and other monocotyledons have a fibrous root system, characterized by a mass of roots of about equal diameter. This network of roots does not arise as branches of the primary root but consists of many branching roots that emerge ...
- fibrous texture
- (from the article "mineral") ...generally gives the double-chain members lower specific gravities and refractive indices than their single-chain analogues. Their crystal habits also are different: amphiboles exhibit needlelike or fibrous crystals, while pyroxenes take the form of stubby prisms. In addition, the different chain ...
- fibrous-rooted begonia
- (from the article "begonia") Fibrous-rooted begonias can be further divided into the wax, or bedding, begonias (Semperflorens-Cultorum group), including the offshoots of B. semperflorens used most often as summer bedding plants; the so-called cane stem types (angelwing begonias), characterized by their tall stems; and ...
- fibula
- outer of two bones of the lower leg or hind limb, probably so named because the inner bone, the tibia, and the fibula together resemble an ancient brooch, or pin. In humans the head of the fibula is joined to ... [4 Related Articles]
- fibula
- brooch, or pin, originally used in Greek and Roman dress for fastening garments. The fibula developed in a variety of shapes, but all were based on the safety-pin principle. [4 Related Articles]
- Fichte, Immanuel
- (from the article "Hegelianism") ...are compatible and another review in which Hegel responded indirectly to arguments of Herbart. Among Hegel's critics can be distinguished speculative theists such as Christian Weisse of Leipzig and Immanuel Fichte, the son of the more famous Johann Fichte, who ...
- Fichte, Johann Gottlieb
- German philosopher and patriot, one of the great transcendental idealists. [14 Related Articles]
- Fichtel Hills
- mountains in northeastern Bavaria Land (state), southeastern Germany. They lie at the Czech border between the Franconian Forest in the northwest, the Ore Mountains (in German, Erzgebirge; in Czech, Krusne Hory) in the northeast, and the Upper ...
- Fichtel Mountain
- (from the article "Ore Mountains") ...face (2,000 to 2,500 feet [600 to 750 metres] high in places); the outer slope to the northwest is gradual. The highest summits, Klinovec (4,081 feet [1,244 metres]) on the Czech side and Fichtel Mountain (3,983 feet [1,214 metres]) on ...
- Fichtelgebirgehumpen
- (from the article "Humpen glass") ...depict either the German emperor on horseback, with the three spiritual electors behind him and four princes below, or the kaiser enthroned, with three or four princes on either side. Fichtelgebirgehumpen are decorated with mountain landscapes. None of the surviving ...
- ficin
- (from the article "Rosales") The latex of Ficus glabrata and F. laurifolia contains the proteolytic enzyme ficin, which digests Ascaris lumbricoides (roundworm, or nematode), the agent of ascariasis, without harming the human host. It is used extensively in South America and Panama. Ficus species ...
- Ficino, Marsilio
- Italian philosopher, theologian, and linguist whose translations and commentaries on the writings of Plato and other classical Greek authors generated the Florentine Platonist Renaissance that influenced European thought for two centuries. [10 Related Articles]
- Fick's law of diffusion
- (from the article "physical science, principles of") describes the conservation of particles. Secondly, Fick's law states that the random wandering causes an average drift of particles from regions where they are denser to regions where they are rarer, and that the mean drift rate is proportional to ...
- Fick, Adolf E.
- (from the article "contact lens") thin, artificial lens worn on the surface of the eye to correct refractive defects of vision. The first contact lens, made of glass, was developed by Adolf Fick in 1887 to correct irregular astigmatism. The early lenses, however, were uncomfortable ...
- Fick, August
- German linguist, a pioneer in Indo-European etymological research who made the first comprehensive study of the common vocabulary of Indo-European languages and sought to determine their prototype.
- Ficker, Julius von
- (from the article "diplomatics") ...of early-medieval French documents were printed in the Recueil des actes by a variety of eminent editors. But the greatest advances were made by German and Austrian scholars, among whom Julius von Ficker investigated the differentiation between actum and datum ...
- Fico, Robert
- (from the article "Slovakia") Area: 49,035 sq km (18,933 sq mi) | Population (2007 est.): 5,396,000 | Capital: Bratislava | Chief of state: President Ivan Gasparovic | Head of government: Prime Minister Robert Fico | BRITANNICA BOOK OF THE YEAR 2007Slovakia
- fiction
- literature created from the imagination, not presented as fact, though it may be based on a true story or situation. Types of literature in the fiction genre include the novel, short story, and novella. The word is from the Latin ... [2 Related Articles]
- fictionalism
- (from the article "mathematics, philosophy of") Mathematical fictionalists agree with paraphrase nominalists that there are no such things as abstract objects and, hence, no such things as numbers. They think that paraphrase nominalists are mistaken, however, in their claims about what mathematical sentences such as "4 ...
- fictionalized biography
- (from the article "biography") The books in this fifth category belong to biographical literature only by courtesy. Materials are freely invented, scenes and conversations are imagined; unlike the previous category, this class often depends almost entirely upon secondary sources and cursory research. Its authors, ...
- fictive kinship
- (from the article "India") Beyond the family the most important unit is the caste. Within a village all members of a single caste recognize a fictive kinship relation and a sense of mutual obligation, but ideas of fictive kinship extend also to the village ...
- fictive temperature
- (from the article "industrial glass") ...exception of vitreous silica). The structure of glass at h is assumed to be identical to that of the liquid at (Tf)1. Known as the fictive temperature, (Tf)1 is the temperature at which the liquid structure is frozen into the ...
- Ficus
- a group of about 900 species of trees, shrubs, and vines, commonly called figs. Native primarily to tropical areas of East Asia, they are distributed throughout the world's tropics. Many are tall forest trees that are buttressed by great spreading ... [9 Related Articles]
- Ficus insipida
- (from the article "Ficus") ...The seeds of strangler figs germinate on a host tree and grow around its trunk in a strangling latticework, eventually killing the host tree. One freestanding New World species, F. insipida, has the highest photosynthetic rate of ...
- Fidal script
- (from the article "Nilo-Saharan languages") An adapted form of the Fidal script, which was used for writing Amharic, has been developed for the orthographies of a number of Nilo-Saharan languages spoken in Ethiopia. Other orthographic traditions of writing for African languages generally are based on ...
- fiddle
- medieval European bowed, stringed musical instrument. The medieval fiddle, a forerunner of the violin, emerged in 10th-century Europe, possibly deriving from the lira, a Byzantine version of the rabab, an Arab bowed instrument. Medieval fiddles varied in size and shape ... [7 Related Articles]
- fiddle-leaf fig
- (from the article "Ficus") ...the massive crowns. The India rubber plant (F. elastica), a large tree that was formerly an important source of rubber, is now cultivated as an indoor potted plant. The fiddle-leaf fig (F. lyrata), the ...
- fiddle-leaf philodendron
- (from the article "Philodendron") ...(Philodendron scandens oxycardium). The velvet-leaf philodendron (P. scandens micans) has small bronzy-green velvety leaves with reddish undersides. Of moderate size is the fiddle-leaf, or horsehead, philodendron (P. bipennifolium), with fiddle-shaped, large, glossy green leaves up to 15-25 cm (6-10 inches) ...
- fiddler crab
- any of the approximately 65 species of the genus Uca (order Decapoda of the subphylum Crustacea). They are named "fiddler" because the male holds one claw, always much larger than the other, somewhat like a violin. Both claws in the ... [5 Related Articles]
- fidei commissum
- in Roman law and civil-law systems, a gift of property to a person (usually by will), imposing upon that person the obligation to transfer it to a specified ultimate recipient, the latter being a person legally incapable of taking the ... [1 Related Articles]
- fideism
- a philosophical view extolling theological faith by making it the ultimate criterion of truth and minimizing the power of reason to know religious truths. Strict fideists assign no place to reason in discovering or understanding fundamental tenets of religion. For ... [3 Related Articles]
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