- 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.
One of a group of organosulfur compounds which are also called thiols or thio alcohols and which have the general structure RSH. Aromatic thiols are called thiophenols, and biochemists often refer to thiols as sulfhydryl compounds. The unpleasant odor of volatile thiols causes them to be classed as stenches, but the odors of many solid thiols are not unpleasant.
Industry:Science
Modern electronics is based largely on the inorganic semiconductor silicon. In contrast, molecular electronics is concerned with the exploitation of organic compounds. Its many current commercial applications include liquid-crystal displays, conductive-polymer sensors, and pyroelectric plastics. Longer-term developments might include molecular computational devices.
Industry:Science
Naturally occurring esters of glycerol and fatty acids that have commercial uses. Since fats and oils are triesters, they are commonly called triglycerides or simply glycerides. A glyceride may be designated a fat or oil, depending on its melting point. A fat is solid and an oil is liquid at room temperature. Some liquid waxes are incorrectly referred to as oils.
Industry:Science
Mineral deposits, including ore bodies and potential ore, that are presently recoverable and may be so in the future. Much of what is consumed in modern society has to be obtained from mineral extraction. Countless items, whether coffee cups, camera film, electronic equipment, glasses, motor vehicles, or jewelry, contain minerals that must be extracted from the earth.
Industry:Science
Objects (and events) in the environment vary in many different aspects. In psychology, aspects that vary continuously are called dimensions, and aspects that vary in all-or-none fashion are called features. For example, sounds vary continuously in loudness, so loudness is a dimension of sound. Animals either have or do not have wings, so wings is a feature of animals.
Industry:Science
Relationships between electrically equivalent networks with three terminals, one being connected internally by a Y configuration and the other being connected internally by a Δ configuration. These relationships are also known as star-delta transformations. More complicated relationships can also be derived between a many-armed star and the equivalent many-sided mesh.
Industry:Science
Interference in a communications channel (disturbed channel) caused by activity in other communications channels (disturbing channels). The term was originally used to denote the presence in a telephone receiver of unwanted speech signals from other conversations, but its scope has been extended by common usage to include like effects in other types of communications.
Industry:Science
Minerals containing beryllium as an essential component. Over 50 beryllium minerals have been identified, even though beryllium is a scarce element in the Earth's crust. The unusual combination of low charge (+2) and small ionic radius (0.035 nanometer) of the beryllium ion accounts for this diverse group of minerals and their occurrence in many natural environments.
Industry:Science
Sheep are members of the family Bovidae in the order Artiodactyla, the even-toed, hoofed mammals. Sheep were possibly the first animals to be domesticated about 11,000 years ago in southwestern Asia, a time when sheep were closely associated with the religious, civic, and domestic life of the people. They are referred to more often in the Bible than any other animal.
Industry:Science
In general, a large mass of snow, ice, rock, earth, or mud in rapid motion down a slope or over a precipice. In the English language, the term avalanche is reserved almost exclusively for snow avalanche. Minimal requirements for the occurrence of an avalanche are snow and an inclined surface, usually a mountainside. Most avalanches occur on slopes between 30 and 45°.
Industry:Science
