- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
A member of the family Mustelidae, which also includes weasels, mink, ferrets, martens, sables, fishers, badgers, and wolverines. Otters are found worldwide except in Australia, Madagascar, and on the islands of the South Pacific. Most inhabit freshwater lakes and rivers. The sea otter (<i>Enhydra lutris</i>), however, inhabits the waters and shores of the northern Pacific Ocean from southern California to the Kurile Islands.
Industry:Science
A member of the feldspathoid group of minerals. Members of this group are characterized by the following related features: (1) All are aluminosilicates with one or more of the large alkali ions (for example, sodium, potassium) or alkaline-earth ions (for example, calcium, barium). (2) The proportion of aluminum relative to silicon, both of which are tetrahedrally coordinated by oxygen, is high. (3) Although the crystal structures of many members are different, they are all classed as tektosilicates; that is, they consist of a three-dimensional framework of aluminum and silicon tetrahedrons, each unit of which shares all four vertices with other tetrahedrons, giving rise to a ratio of oxygen to aluminum plus silicon of 2:1. Ions of other elements occupy interframework sites. (4) They occur principally in igneous rocks, but only in silica-poor rocks, and do not coexist with quartz (SiO<sub>2</sub>). Feldspathoids react with silica to yield feldspars, which also are alkali–alkaline-earth aluminosilicates. Feldspathoids commonly occur with feldspars.
Industry:Science
A member of the genus <i>Marmota</i> in the squirrel family Sciuridae. Fourteen species occur mainly in mountainous areas in the northern hemisphere (see <b>table</b>).
Industry:Science
A member of the genus <i>Paramyxovirus</i> of the family Paramyxoviridae which is associated with a variety of respiratory illnesses. The virus particles range in size from 90 to 200 nanometers, agglutinate red blood cells, and (like the influenza viruses) contain a receptor-destroying enzyme. They differ from the influenza viruses in their large size, their possession of the larger ribonucleoprotein helix characteristic of the paramyxoviruses, their tendency to lyse as well as agglutinate erythrocytes, and their generally poor growth in eggs. In culture these viruses grow well in primary monkey or human epithelial cells; although they produce little cytopathic effect in the culture cells, they are easily recognized by the hemadsorption method. They are relatively unstable upon storage, even at freezing temperatures. Laboratory diagnosis may be made by hemagglutination-inhibition, complement fixation, and neutralization tests of the patient's blood.
Industry:Science
A member of the immunoglobulin class of proteins that is produced and secreted by the B cells (or B lymphocytes) of the immune system in response to antigens (foreign substances). Antibodies are found in the tissue fluids and mucous membranes and are essential for protection against and recovery from infection.
Industry:Science
A member of the linden family (Tiliaceae) in the order Malvales. One species is known as the American linden or basswood (<i>Tilia americana</i>). It is a timber tree of the northeastern quarter of the United States and the adjacent area of Canada and grows to a height of 120 ft (36 m). The leaves are heart-shaped, coarsely toothed, long, pointed, and alternate (see <b>illus.</b>).
Industry:Science
A member of the mammalian cattle family Bovidae in the order Artiodactyla. It is the least-known species of wild cattle alive today. Yaks (<i>Bos grunniens</i>) have been domesticated for at least several hundred years. They are powerful yet docile. Above 2000 m (6600 ft), they are the most useful domestic mammal. They are used for meat and milk production, as a mount, and as a beast of burden. The hair is used for making cloth and tents, the dung is used as fuel, and the tail serves as a flybrush.
Industry:Science
A member of the mammalian family Procyonidae, along with ringtails, coatis, kinkajous, olingos, and lesser pandas. These carnivores inhabit areas from southern Canada to northern Argentina and Uruguay and have been introduced into Russia and Germany. Only one species, <i>Procyon lotor</i>, inhabits North America.
Industry:Science
A member of the nuclear hormone receptor superfamily of transcription factors, similar in both structure and function to the steroid, thyroid, and retinoid receptors. Peroxisome proliferator-activated receptors (PPARs) respond to specific factors by altering gene expression in a cell-, developmental-, sex-specific manner. PPARs were initially characterized as being activated by peroxisome proliferators (PPs), a large group of hypolipidemic agents and pollutants. Subsequently, it was shown that PPARs respond to endogenous fatty acids and control a variety of target genes involved in lipid homeostasis. Further, PPARs were shown to play a key role in the response to antidiabetic drugs. The multifaceted responses of PPARs are actually carried out by three subtypes of PPARs expressed in different tissues. Currently, the subfamily has been defined as PPARα, PPARβ (also called PPARδ and NUC1), and PPARγ, each with a possibility of different ligands, target genes, and biological roles see <b>illustration</b>.
Industry:Science
A member of the pine family, <i>Sequoia sempervirens</i>, is the tallest tree in the Americas, attaining a height of 350 ft (107 m) and a diameter of 27 ft (8.2 m). Its range is limited to a strip along the Pacific Coast about 35 mi (55 km) wide and 500 mi (800 km) long, extending from southwest Oregon to about 100 mi (160 km) south of San Francisco, California. The leaves are evergreen, sharply pointed, small (0.3–1 in. or 8–25 mm long), distichous (disposed in two vertical rows) on short branches, and scalelike on the main stem (see <b>illus.</b>). The cones are egg-shaped, about 1 in. (25 mm) long and 0.5 in. (13 mm) broad. The bark is a dull red-brown, on old trees sometimes 1 ft (0.3 m) thick, densely fibrous, and highly resistant to fire. The tree gets its common name from the color of the bark as well as that of the heartwood. The wood is moderately light in weight and strength and low in warp and shrinkage, and is not difficult to work. The heartwood is especially valuable, being highly resistant to decay. The wood holds paint well. It is used for bridge timbers, tanks, flumes, silos, posts, shingles, paneling, doors, caskets, furniture, siding, and many other building purposes.
Industry:Science
