- 行业: Printing & publishing
- Number of terms: 178089
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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.
The major clot-forming substrate in the blood plasma of vertebrates. Though fibrinogen represents a small fraction of plasma proteins (normal human plasma has a fibrinogen content of 2–4 mg/ml of a total of 70 mg protein/ml), its conversion to fibrin causes a dramatic gelation which blocks the flow of blood. Upon injury, sufficient amounts of the clotting enzyme, thrombin, are generated in about 5 min clotting time to produce a gel.
Industry:Science
The presence of gaseous and particulate contaminants in the indoor environment. Most pollution is due to human sources, although natural sources do exist, including plants, animals, and other living organisms and bodies of water that release various chemical aerosols. Contamination can occur from infiltration indoors of atmospheric pollutants generated outdoors, and thus the indoor environment is affected by meteorological conditions.
Industry:Science
The oldest of the seven geological epochs of the Cenozoic Era, and the oldest of the five epochs that make up the Tertiary Period. The Paleocene Epoch represents an interval of geological time (and rocks deposited during that time) from the end of the Cretaceous Period to the beginning of the Eocene Epoch. Recent revisions of the geological time scales place the Paleocene Epoch between 65 to 55 million years before present (m.y. B.P.).
Industry:Science
The rapid development of human ability to bring about drastic alterations of the environment has added a new element to the responsibilities of the engineer. Traditionally, the ingredients for sound engineering have been sound science and sound economics. Today, sound sociology must be added if engineering is to meet the challenge of continued improvement in the standard of living without degradation of the quality of the environment.
Industry:Science
The measurement of the integral, with respect to time, of the power in an electric circuit. The absolute unit of measurement of electrical energy is the joule, or the charge in coulombs times the potential difference in volts. The joule, however, is too small (1 watt-second) for commercial use, and the more commonly used unit is the watt-hour (3.6×10<sup>3</sup> joules). The most common measurement application is in the utility field.
Industry:Science
The phenomenon occurring when the Sun does not set, but only approaches the horizon at midnight. The effect occurs near the time of the summer solstice, on June 21, for latitudes north of the Arctic Circle. The same effect occurs near the time of the winter solstice, on December 21, for latitudes south of the Antarctic Circle. (Here “summer” and “winter” refer to the Northern Hemisphere; seasons are reversed in the Southern Hemisphere.)
Industry:Science
The rotation of the Earth about its axis is demonstrated by the classical Foucault pendulum experiment. Its revolution in its orbit around the Sun is shown by the annual parallactic displacement of relatively nearby stars against the background of more distant stars. However, because the Earth is not truly a rigid symmetric body and because it interacts with other members of the solar system gravitationally, these motions vary with time.
Industry:Science
The organ which sends information about sound to the brain, constituting the sense of hearing, as well as vestibular information about the orientation of the head in space. The vertebrate ear is generally divided into three regions that have discrete functions: The inner ear is found in all vertebrates, and it subsumes both hearing and balance (functions). The external ear and the middle ear, not found in all vertebrates, enhance hearing.
Industry:Science
The removal of material from a solid surface as a result of sliding action. It constitutes the main reason why the artifacts of society (automobiles, washing machines, tape recorders, cameras, clothing) become useless and have to be replaced. There are a few uses of the wear phenomenon, but in the great majority of cases wear is a nuisance, and a tremendous expenditure of human and material resources is required to overcome the effects.
Industry:Science
The simplest aldehyde, formula HCH=O. Because of its extreme reactivity, even with itself, it cannot be readily isolated or handled in the pure state. Therefore, it is produced and marketed as an aqueous solution (usually 37–50% formaldehyde by weight), sometimes known as Formalin. It is also sold as the solid hydrated polymer known as paraformaldehyde or paraform. Approximately 60% of all the formaldehyde produced is for captive use.
Industry:Science
