- 行业: Printing & publishing
- Number of terms: 178089
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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 name given to two species of rodents which, together with four species of viscachas, make up the family Chinchillidae. These animals are native to several areas of South America and are widely bred on farms in North America and Europe for their fur, which is long, fine, and expensive. The wild population is protected in Chile since the killing of wild stocks in the early 1900s almost led to extinction.
Industry:Science
The sudden brightening of a previously inconspicuous star. The name, short for nova stella (new star), formerly included objects now classified as supernovae and as other kinds of cataclysmic variables. Classical novae now include only those events where the energy source is hydrogen fusion (burning) on the surface of a white dwarf in a close binary system and the white dwarf is not destroyed in the process.
Industry:Science
Eine Auflistung von gedrückt und getrocknete Pflanzen Exemplare, und eine Beschreibung des wann, wo und von wem sie gesammelt wurden, waren in einer systematischen Weise angeordnet, und als einen permanenten physischen Datensatz des Vorkommens einer einzelnen Anlage auf einen bestimmten Ort und Zeit. Herbarien enthalten Proben aus der das gesamte Spektrum der Organismen, die klassisch Pflanzen gegolten haben: Pilze, Flechten, Algen, Moose, Farne und ihre Verbündeten, Nacktsamern und Bedecktsamern. Viele Herbarien auch sammeln und Verwalten von Sondersammlungen wie Flüssigkeit erhaltenen Teile für Anatomische Studien, Holz, Samen oder speziell erhaltene Material für die Gewinnung von Desoxyribonukleinsäure (DNA) oder andere chemische Bestandteile geeignet. Viele Gruppen von Pflanzen, vor allem diejenigen mit saftigen oder fleischigen teilen, sind nicht geeignet für Erhaltung als trockene, flache Exemplare, denn sie viele ihre wichtigsten Funktionen in der Trocknung verlieren. Diese Pflanzen sind daher oft in Flüssigkeit erhalten.
Industry:Science
The tendency of dissimilar solids or liquids to cling together as a result of the interatomic forces which they exert upon each other across their common interface. Some factors affecting molecular adhesion are the physical state of the materials, the composition and the topology of the surfaces in contact, the temperature, and the presence of foreign materials such as adsorbed gases on one or both surfaces.
Industry:Science
The stage in the evolution of a star in which the pressure in the star is insufficient to maintain the star at a stable size. The material in the star or in the core of the star then falls inward under its own gravitational attraction. Depending on the mass, composition, and spin of the star, the collapse may proceed to the formation of a neutron star or black hole, possibly accompanied by a supernova explosion.
Industry:Science
The name for about 300 species of reptiles that form the family Gekkonidae in the order Squamata. They are small lizards, primarily arboreal and nocturnal, which occur in the warm regions of the world. The body is flattened and never exceeds 14 in. (35 cm) in length. Most species have five digits, while some have only four; the toes often have adhesive pads to assist the animal when climbing on smooth surfaces.
Industry:Science
The oxygen-carrying molecule of the red blood cells of vertebrates. This protein represents more than 95% of the solid constituents of the red cell. It is responsible for the transport of oxygen from the lungs to the other tissues of the body and participates in the transport of carbon dioxide in the reverse direction. More is known about the chemical structure and function of hemoglobin than any other protein.
Industry:Science
The term biorefinery relates to the concept of deriving multiple fuel, chemical, and material products from biomass in a way that is analogous to the operation of a petroleum refinery. The key feature that is common to both petroleum- and biobased refineries is the capability to generate a range of commercially useful products in a versatile manner that allows for rapid adjustment according to market requirements.
Industry:Science
The name given to marine polychaete worms (particularly to many species in the family Serpulidae) which construct permanent calcareous tubes on rocks, seaweeds, dock pilings, and ship bottoms. The individual tubes with hard walls of calcite-aragonite, ranging from 0.04 to 0.4 in. (1 mm to 1 cm) in diameter and from 0.16 to 4 in. (4 mm to 10 cm) in length, are firmly cemented to any hard substrate and to each other.
Industry:Science
The principle that multiple frequencies applied to a nonlinear device produce new frequencies that are sums and differences of the applied frequencies and their harmonics. Heterodyning, or mixing, is the process of multiplying a weak signal by a strong sinusoidal carrier, sometimes called the local oscillator, to shift the frequency of the signal in such a way that the information carried by the signal is preserved.
Industry:Science
