- 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.
Any of the oriented intergrowths of potassium- and sodium-rich feldspars, (K,Na)AlSi<sub>3</sub>O<sub>8</sub>, whose proportions are determined in part by the initial composition of the alkali feldspar from which they exsolved and whose physical properties are thus somewhat variable. The early stages of perthite formation from homogeneous, usually monoclinic (K,Na)AlSi<sub>3</sub>O<sub>8</sub> may be observed experimentally by high-magnification electron microscopy.
Industry:Science
Bats (order Chiroptera = “hand-wing”) are among the most common living mammals. They represent nearly one-fifth of all mammalian species and live virtually everywhere, except in the harshest of polar climates. Most bats are active only during the evening and at night, making their activities mysterious to most people. Bats are among the most important seed dispersers in the tropics and, along with birds, are a major factor in controlling insect populations worldwide.
Industry:Science
Ichnology is the study of animal-sediment relationships and encompasses the examination of both modern and ancient structures. Trace fossils are biologically produced structures that include tracks, trails, burrows, borings, fecal pellets, and other traces made by organisms. Owing to their nature, trace fossils can be considered as both paleontological and sedimentological entities, thereby bridging the gap between two of the main subdivisions in sedimentary geology.
Industry:Science
Computer analysis and generation of natural language text. The goal is to enable natural languages, such as English, French, or Japanese, to serve either as the medium through which users interact with computer systems, such as database management systems and expert systems (natural language interaction), or as the object that a system processes into some more useful form, such as in automatic text translation or text summarization (natural language text processing).
Industry:Science
Enzymes are proteins found in all living cells. They catalyze biochemical processes but are not consumed in the process. As proteins, they are biodegradable and operate at specific pH values and at temperatures found in nature. Enzymes are fairly specific, and there is one reaction that is optimal for each. Fungal enzymes are used in various ways, and new applications are constantly being discovered. Enzymes can replace chemical catalysts in some industrial processes.
Industry:Science
Any of four membranous structures surrounding the embryo during its developmental period. Because these membranes are external to the embryo proper, they are called extraembryonic membranes. Throughout embryonic development, every embryo must contend with a few basic needs. All developing animals need some source of nutrition, a way to remove wastes, some form of respiration, and protection from the outside environment. Fetal membranes collectively serve these functions.
Industry:Science
Behavior that is intended to threaten or inflict physical injury on another person or organism; a broader definition may include such categories as verbal attack, discriminatory behavior, and economic exploitation. The inclusion of intention in defining aggression makes it difficult to apply the term unequivocally to animals in which there is no clear means of determining the presence or absence of intention. As a result, animal violence is usually equated with aggression.
Industry:Science
Construction of natural building stone or manufactured units such as brick, concrete block, adobe, glass block, or cast stone that is usually bonded with mortar. Masonry can be used structurally or as cladding or paving. It is strong in compression but requires the incorporation of reinforcing steel to resist tensile and flexural stresses. Masonry veneer cladding can be constructed with adhesive or mechanical bond over a variety of structural frame types and backing walls.
Industry:Science
Any of a series of water-soluble polymers with the general formula HO(CH<sub>2</sub>CH<sub>2</sub>O)<sub><i>n</i></sub>H. These colorless, odorless compounds range in appearance from viscous liquids for <i>n</i> = 2 to 13 (freezing point range of −15 to 15°C or 5 to 32°F); waxy solids and pastes for <i>n</i> = 22 to 90 (melting point range of 37 to 58°C or 98 to 136°F); and free flowing powder for <i>n</i> = 113 and above (melting point range of 60 to 67°C or 140 to 153°F).
Industry:Science
Electrically induced birefringence that is proportional to the square of the electric field. When a substance (especially a liquid or a gas) is placed in an electric field, its molecules may become partly oriented. This renders the substance anisotropic and gives it birefringence, that is, the ability to refract light differently in two directions. This effect, which was discovered in 1875 by John Kerr, is called the electrooptical Kerr effect, or simply the Kerr effect.
Industry:Science
