- 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.
The process of causing strong deviations from thermal equilibrium populations of selected quantized states of different energy in atomic or molecular systems by the use of optical radiation (that is, light of wavelengths in or near the visible spectrum), called the pumping radiation.
Industry:Science
The reversible interconversion of structural isomers of organic chemical compounds. Such interconversions usually involve transfer of a proton (prototropy), but anionotropic (allylic, Wagner-Meerwein) rearrangements may be reversible and so be classed as tautomeric interconversions.
Industry:Science
The terms infinity and infinite have a variety of related meanings in mathematics. The adjective finite means “having an end,” so infinity may be used to refer to something having no end. In order to give a precise definition, the mathematical domain of discourse must be specified.
Industry:Science
The process of absorption of light energy by plants and animals and its utilization for biologically important purposes. In plants photoreception plays an essential role in photosynthesis and an important role in orientation. Photoreception in animals is the initial process in vision.
Industry:Science
The term stone is applied to rock that is cut, shaped, broken, crushed, or otherwise physically modified for commercial use. The two main divisions are dimension stone and crushed stone. Other descriptive terms may be used, for example, building stone, roofing stone, or precious stone.
Industry:Science
The study of magnetic properties of materials by analyzing the interactions between a magnetic field and chemical substances, which include both molecular and extended structures. All substances respond to a magnetic field. Some materials, called permanent magnets, generate magnetic fields.
Industry:Science
The study of the spatial distributions of plants and vegetation and of the environmental relationships which may influence these distributions. Plant geography (or certain aspects of it) is also known as phytogeography, phytochorology, geobotany, geographical botany, or vegetation science.
Industry:Science
The method of controlling machines by the application of digital electronic computers and circuitry. Machine movements that are controlled by cams, gears, levers, or screws in conventional machines are directed by computers and digital circuitry in computer numerical control (CNC) machines.
Industry:Science
The specific heat (short for specific heat capacity) of a solid is the amount of heat required to increase the temperature of a unit mass of the solid by a unit amount. It is determined by the vibrations of its atoms or excitations of its electrons, and also by a variety of phase transitions.
Industry:Science
The predominant sources of scarce metals, such as copper, zinc, lead, tin, molybdenum, antimony, tungsten, mercury, bismuth, uranium, silver, and gold. Fascinating because of their variety, they are the subject of intense research aimed at understanding them better and finding them efficiently.
Industry:Science
