- 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 DNA-protein complex in the nucleus of eukaryotic cells. Chromosomes were so named because after staining, nineteenth-century light microscopists saw chromosomes as colored bodies in cells. The combination of DNA and proteins in chromosomes is called chromatin. Collectively the DNA from all the chromosomes in a nucleus is the hereditary blueprint for the species. Eukaryotes (plants, animals, fungi, and protists) usually have one nucleus in each cell. A nucleus is a double membrane-bound compartment in which chromosomes are located in interphase between cell divisions. In contrast, prokaryotes, such as bacteria and their allies (including mitochondria and chloroplasts), do not have true chromosomes or nuclei because prokaryotes do not confine their small, single circle of DNA in a membrane-bound compartment.
Industry:Science
A double star system in the late stage of stellar evolution. A symbiotic star is a binary system and not a single star. The symbiotic phase represents a brief span in the life of the binary. Symbiotic stars are rare objects, and their distances are as a rule many hundreds of parsecs (1 parsec = 3.26 light-years). Thus, on ordinary photographic plates of the sky, symbiotic stars appear pointlike and are not resolved into two individual stars. On closer inspection, symbiotics are always associated with a nebular environment. The “near-official” list of symbiotic stars contains 188 safe entries; 15 of them are extragalactic, of which 1 lies in the dwarf galaxy Draco, 6 lie in the Small Magellanic Cloud, and 8 lie in the Large Magellanic Cloud. The list contains in addition 30 suspected candidates.
Industry:Science
A drawing illustrating electrical and mechanical relationships between parts on a component that require interconnection by electrical wiring.
Industry:Science
A drug used to destroy or prevent the growth of infectious microorganisms on or in the human or animal body, that is, on living tissue. The legal definition is stated in the Federal Food, Drug, and Cosmetic Act, Chap. II, Sect. 201, Para. (o) as follows: “The representation of a drug, in its labeling, as an antiseptic shall be considered to be a representation that it is a germicide, except in the case of a drug purporting to be, or represented as, an antiseptic for inhibitory use as a wet dressing, ointment, dusting powder, or such other use as involves prolonged contact with the body.” This means that antiseptics will render microorganisms innocuous, by either killing them or preventing their growth, according to the character of the preparation or the method of application.
Industry:Science
A drug which diminishes the awareness of sensory impulses, especially pain, by the brain. This action makes narcotics useful therapeutically as analgesics. While they are the most powerful pain-relieving agents available, their use is complicated by a number of undesirable side actions. Indeed, much research in this area has been directed toward a search for an agent having the same degree of analgesic properties as morphine, the most widely used of the narcotics, but without its undesirable side actions.
Industry:Science
A dry dock is a facility that removes a ship from its water environment. A dry dock can be dug out of the ground, such as a graving dock. It can also be a floating dry dock, that is, a vessel that is initially ballasted (weighted) down and can then lift a ship brought over it out of the water after deballasting. A heavylift ship also functions this way and will be discussed later. Dry docks have been pivotal throughout the history of both merchant marine commerce and naval sea power.
Industry:Science
A duct in which the effects of airflow past objects can be determined. The steady-state forces on a body held still in moving air are the same as those when the body moves through still air, given the same body shape, speed, and air properties. Scaling laws permit the use of models rather than full-scale aircraft. Models are less costly and may be modified more easily than aircraft, and conditions may be simulated that would be impossible or dangerous in flight.
Industry:Science
A dye or a spice obtained from the plant <i>Curcuma longa</i>, which belongs to the ginger family (Zingiberaceae). It is a stout perennial with short stem, tufted leaves, and short, thick rhizomes which contain the colorful condiment. As a natural dye, turmeric is orange-red or reddish brown, but it changes color in the presence of acids or bases. As a spice, turmeric has a decidedly musky odor and a pungent, bitter taste. It is an important item in curry and is used to flavor and color butter, cheese, pickles, and other food.
Industry:Science
A facility designed for the production of television programs, which may be broadcast live concurrently with the production or recorded for later broadcast. A television studio consists of the studio room, wherein the actual program takes place, and various support rooms, which include the control room, the equipment room, and the property room.
Industry:Science
A facing or veneer of stone, concrete, or other materials constructed on a sloping embankment, dike, or beach face to protect it against erosion caused by waves or currents. The revetment may be a rigid cast-in-place concrete structure; but more commonly it is a flexible structure constructed of stone riprap or interlocking concrete blocks. It is sometimes an articulated block structure where the armor blocks are set in a form known as a flexible carpet; that is, the blocks interlock for stability, but the interlocking makes them flexible enough to respond to settlement of the underlying soil. A flexible revetment provides protection from exterior hydraulic forces, and it also can tolerate some settlement or consolidation of the underlying soil.
Industry:Science
