- 行业: Printing & publishing
- Number of terms: 178089
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- 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 fold in layered rocks in which the strata are inclined down and away from the axes. The simplest anticlines (see <b>illus</b>.) are symmetrical, but in more highly deformed regions they may be asymmetrical, overturned, or recumbent. Most anticlines are elongate with axes that plunge toward the extremities of the fold, but some have no distinct trend; the latter are called domes. Generally, the stratigraphically older rocks are found toward the center of curvature of an anticline, but in more complex structures these simple relations need not hold. Under such circumstances, it is sometimes convenient to recognize two types of anticlines. Stratigraphic anticlines are those folds, regardless of their observed forms, that are inferred from stratigraphic information to have been anticlines originally. Structural anticlines are those that have forms of anticlines, regardless of their original form.
Industry:Science
A food condiment containing mainly acetic acid that is produced by the bacterial oxidative fermentation of various ethanolic solutions. Vinegar, like wine and certain milk products, is one of the oldest fermented foods used by humans. Babylonian records indicate that vinegars prepared from wines and beer were widely used as early as 5000 <small>B.C.</small>
Industry:Science
A food grain crop. Wheat is the most widely grown food crop in the world, and is increasing in production. It ranks first in world crop production and is the national food staple of 43 countries. At least one-third of the world's population depends on wheat as its main staple. The principal food use of wheat is as bread, either leavened or unleavened.
Industry:Science
A food product made by churning cream. In the United States, butter is not defined by Standard of Identity in the Food, Drug and Cosmetic Act as are most foods, but instead it was defined in 1923 by an act of Congress. Butter must contain at least 80% milk fat and may contain added salt or color. In antiquity, butter and cheese were made as a means of preserving the surplus milk for later use.
Industry:Science
A food product selectively concentrated from major milk components. It is generally rich in flavor and contains high-quality nutrients. There are many varieties of cheese, all produced in the following general manner: Raw or pasteurized milk is clotted by acid, rennet, or both. The curd is cut and shaped into the special form of the cheese with or without pressing. Salt is added, or the cheese is brined after pressing.
Industry:Science
A force fit that has negative allowance; that is, the bore in the fitted member is smaller than the shaft which is pressed into the bore. Tight fits have slight negative allowance so that light pressure is required to assemble the parts; they are used for gears, pulleys, cranks, and rocker arms. Medium force fits have somewhat greater negative allowance and require considerable pressure for assembly; they are used for fastening locomotive wheels, car wheels, and motor armatures.
Industry:Science
A force which acts only during a short time interval but which is sufficiently large to cause an appreciable change in the momentum of the system on which it acts. The momentum change produced by the impulsive force is described by the momentum-impulse relation. For a discussion of this relation
Industry:Science
A force whose line of action is always directed toward a fixed point. The central force may attract or repel. The point toward or from which the force acts is called the center of force. If the central force attracts a material particle, the path of the particle is a curve concave toward the center of force; if the central force repels the particle, its orbit is convex to the center of force. Undisturbed orbital motion under the influence of a central force satisfies Kepler's law of areas.
Industry:Science
A forest pest is any organism that adversely affects the functioning of forest trees. Exotic forest pests, which have been introduced into the United States from abroad, have been primarily insects and infectious microorganisms (for example, the gypsy moth and microorganisms that cause chestnut blight). Of greatest concern are exotic forest pests from temperate forests similar to those of the United States, such as in Europe, eastern Russia, China, Australia, New Zealand, and Chile. Much of the recent importation of logs, wood chips, and lumber from temperate forests has been into the Pacific Northwest, including Oregon, Washington, and northern California.
Industry:Science
A form of atomic and molecular spectroscopy in which wavelength-tunable lasers are used to remove electrons from (ionize) a given kind of atom or molecule. Laser-based resonance ionization spectroscopy (RIS) methods have been developed and used with ionization detectors, such as proportional counters, to detect single atoms. Resonance ionization spectroscopy can be combined with mass spectrometers to provide analytical systems for a wide range of applications, including physics, chemistry, materials sciences, medicine, and the environmental sciences.
Industry:Science
