- 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 unitary structure formed of two or more sheets of glass between each of which is interposed a sheet of plastic, usually polyvinyl butyral. In usual manufacture, two clean and dry sheets of plate glass and a sheet of plastic are preliminarily assembled as a sandwich under slight pressure in order to produce a void-free bond. The laminate is then pressed at 75–225 lb/in.<sup>2</sup> (0.5–1.5 megapascals) under heat at 239–302°F (115–150°C) long enough to unite. For use in surface vehicles the finished laminated glass is approximately ¼ in. (6 mm) thick; for aircraft it is thicker.
Industry:Science
A useful but obsolescent term for the energy available from elements and compounds when they react, as in a combustion reaction. In precise terminology, there is no such thing as chemical energy, since all energy is stored in matter as either kinetic energy or potential energy.
Industry:Science
A vapor or gaseous discharge lamp in which the arc discharge takes place in mercury vapor. This lamp is widely used for roadway and all other forms of illumination, and as a source of ultraviolet radiation for industrial applications.
Industry:Science
A variable resistor constructed so that its resistance value may be changed without interrupting the circuit to which it is connected. It is used to vary the current in a circuit. The resistive element of a rheostat may be a metal wire or ribbon, carbon disks, or a conducting liquid.
Industry:Science
A variable whose range is a subset of the real numbers. By extension the term is also used to refer to the theory of functions of one or more real variables. This theory has to do with properties of broad classes of functions, such as continuity, types of discontinuities, differentiability of functions, oscillation and variation of functions, and the various kinds of integrals.
Industry:Science
A variation in the intensity of a composite wave which is formed from two distinct waves with different frequencies. Beats were first observed in sound waves, such as those produced by two tuning forks with different frequencies. Beats also can be produced by other waves. They can occur in the motion of two pendulums of different lengths and have been observed among the different-frequency phonons in a crystal lattice.
Industry:Science
A variety of coal that resembles a carbonaceous shale in outward appearance. It is fine-grained, brown to black, and tough, and breaks with a conchoidal or subconchoidal fracture. The name torbanite is derived from the initial discovery site of the material in 1850 at Torbane Hill, Linlithgowshire, Scotland. Torbanite is synonymous with boghead coal and is related to cannel coal. It is derived from colonial algae identified with the modern species of <i>Botryococcus braunii</i> Kütz and antecedent forms.
Industry:Science
A variety of infectious diseases caused by the coccobacilli <i>Pasteurella multocida</i> and <i>P. haemolytica</i>. However, the term pasteurellosis also applies to diseases caused by any <i>Pasteurella</i> species. For example, <i>P. caballi</i> is considered to have a causal role in upper respiratory infections, pneumonia, peritonitis, and mesenteric abscesses of horses; and <i>P. granulomatis</i> has a causal role in a chronic disease of cattle in Brazil characterized by a progressive fibrogranulomatous process. All <i>Pasteurella</i> species occur as commensals in the upper respiratory and alimentary tracts of their various hosts. Although varieties of some species cause primary disease, many of the infections are secondary to other infections or result from various environmental stresses. <i>Pasteurella</i> species are generally extracellular parasites that elicit mainly a humoral immune response. Several virulence factors have been identified.
Industry:Science
A variety of marine bivalve mollusks which penetrate solid substrata. They represent seven families and vary in the extent to which they are specialized, in the type of substrata they utilize, and in their method of boring. It is difficult to differentiate borers, burrowers, and nestlers because some species, such as <i>Hiatella arctica</i>, not only bore into hard limestones, calcareous sandstones, and chalks, but also burrow in peat or sand-filled crevices in hard rocks, or nestle in holdfasts of <i>Laminaria</i>. Undoubtedly the true borers evolved from burrowers via forms that were living in increasingly harder substrata.
Industry:Science
A variety of neoplastic and nonneoplastic disorders that occur in the ovary. Ovarian neoplasms are of greater diversity in histologic appearance and biologic behavior than for any other organ. The nonneoplastic disorders include physiologic cysts, pregnancy luteomas, and polycystic ovarian disease (Stein-Leventhal syndrome). The ovary can also be a site of metastasis from malignant tumors originating in the genital tract, breast, and gastrointestinal tract.
Industry:Science
