- 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 type of anxiety disorder (commonly referred to as OCD) characterized by recurrent, persistent, unwanted, and unpleasant thoughts (obsessions) or repetitive, purposeful ritualistic behaviors that the person feels driven to perform (compulsions). A cardinal feature of this disorder is an awareness of the irrationality or excess of the obsessions and compulsions accompanied by an inability to control them.
Industry:Science
A type of cancer caused by the feline leukemia virus, a retrovirus which affects only a small percentage of freely roaming or domestic cats. The feline leukemia virus is genetically and morphologically similar to murine leukemia virus, from which it presumably evolved several million years ago.
Industry:Science
A type of carved gemstone in which the background is cut away to leave the subject in relief. Often cameos are cut from stones in which the coloring is layered, resulting in a figure of one color and a background of another. The term cameo, when used without qualification, is usually reserved for those cut from a gem mineral, although they are known also as stone cameos. The commonly encountered cameo cut from shell is properly called a shell cameo.
Industry:Science
A type of chemical used to kill plant-parasitic nematodes. Nematicides may be classed as soil fumigants or soil amendments, space fumigants, surface sprays, or dips. Soil treatments are commonly used because most plant-pathogenic species spend part or all of their life cycle in the soil, in or about the roots of plants. Nematicides may be liquids, gases, or solids, but on a field scale, liquids are most practical. These materials possess a high vapor pressure and volatilize quickly to act as soil fumigants. Carbon disulfide, CS<sub>2</sub>, and chloropicrin were among the first to be developed for this purpose. Their use is fairly restricted because of high cost; besides, CS<sub>2</sub> is highly flammable and explosive and chloropicrin requires a cover or water seal.
Industry:Science
A type of connective tissue that is specialized for the storage of neutral fats (lipids). Adipose cells originate mainly from fibroblasts. In the mammalian embryo, development of adipose cells starts at an early stage. The two types of adipose cells have names reflecting their gross physical appearance: white fat, which can be yellowish if the animal's diet is rich in carotenoids (as found in tomatoes), and brown fat, containing vascularization and respiratory pigments.
Industry:Science
A type of convective transport in fluids that depends on the difference in diffusion rates of at least two density-affecting components. This phenomenon was discovered in 1960 in an oceanographic context, where the two components are heat and dissolved salts. (Double diffusion can also occur in other fluid media, such as magmas, stellar and planetary interiors, and liquid metals.) Besides different diffusivities, it is necessary to have an unstable or top-heavy distribution of one component.
Industry:Science
A type of corona discharge observed on ships under conditions approaching those of an electrical storm. The charge in the atmosphere induces a charge on the masts and other elevated structures. The result of this is a corona discharge which causes a spectacular glow around these points. This effect was accentuated by the contours of early sailing vessels, which usually had several masts and much rigging. The display thus created under darkened conditions was quite striking. The effect was not understood through much of that era and led to much superstition on the part of sailors.
Industry:Science
A type of defective virus particle in which part of the genetic material of papovavirus SV40 is encased within an adenovirus protein coat (capsid). Human adenoviruses require human cells for their propagation; however, papovavirus SV40 can serve as a “helper,” enabling human adenoviruses to replicate in monkey cells.
Industry:Science
A type of drug that inhibits the combination of histamine with histamine receptors. These drugs are termed either H-1 or H-2 receptor antagonists depending on which type of histamine receptor is involved. H-1 receptor antagonists are used largely for treating allergies, and H-2 receptor antagonists are used to treat peptic ulcer disease and related conditions.
Industry:Science
A type of electrical conduction in gases characterized by high current density and low potential drop. The electric arc was discovered by Humphry Davy in 1808, when he connected a piece of carbon to each side of an electric battery, touched the two pieces of carbon together, then drew them slightly apart. The result is a dazzling steam of ionized air, or plasma, at a temperature of 6000°C (10,800°F), the surface temperature of the sun. A typical arc runs at a voltage drop of 100 V with a current drain of 10 A. The arc has negative resistance-the voltage drop decreases as the current increase-so a stabilizing resistor or inductor in series is required to maintain it. The high-temperature gas rises like a hot-air balloon while it remains anchored to the current-feeding electrodes at its ends. It thereby acquires an upward-curving shape, which accounts for its being called an arc.
Industry:Science
