- 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.
An analysis yielding the respective forces acting at any point of any member, or part of a member, of a mechanism, obtained by using relationships for dynamic equilibrium in a plane rigid body subject to external forces within this plane and to internal forces due to its motion in this plane. The following treatment is a careful selection and condensation of essential features of the reasoning.
Industry:Science
An analytic technique concerned with the measurement of the interaction (usually the absorption or the emission) of radiant energy with matter, with the instruments necessary to make such measurements, and with the interpretation of the interaction both at the fundamental level and for practical analysis. Mass spectroscopy is not concerned with the interaction of light with matter, but was so named because the appearance of the data resembles that of the spectroscopic data as just defined.
Industry:Science
An analytical technique for identification of chemical structures, determination of mixtures, and quantitative elemental analysis, based on application of the mass spectrometer. Determination of organic and inorganic molecular structure is based on the fragmentation pattern of the ion formed when the molecule is ionized; further, because such patterns are distinctive, reproducible, and additive, mixtures of known compounds may be analyzed quantitatively. Quantitative elemental analysis of organic compounds requires exact mass values from a high-resolution mass spectrometer; trace analysis of inorganic solids requires a measure of ion intensity as well.
Industry:Science
An anchored or moored floating object, other than a lightship, intended as an aid to navigation. Buoys are the most numerous of all engineered aids to navigation, with some 20,000 in United States waters alone.
Industry:Science
An ancient geological term for coarse-grained, banded crystalline rock. The word, first applied by German miners to rocks widely exposed in the Harz Mountains, was adapted to scientific usage in the late eighteenth century.
Industry:Science
An annual culinary herb of the carrot family, Apiaceae (Umbelliferae). It supplies four products: dill seed oil, dill leaf oil, dill seed, and dill leaf. Although all of the dill grown in the United States is one species, <i>Anethum graveolens,</i> a slightly different species, <i>A. sowa,</i> is grown in Asia. In the United States, two cultivars are grown, Mammoth and Bouquet. Bouquet is a tetraploid cultivar that was developed by treating Mammoth seed with colchicine and then selecting for a shorter (2–5 ft or 0.6–1.5 m) and more compact growth habit. Mammoth is a taller, more robust plant growing 4–8 ft (1.2–2.4 m) tall. Other varieties exist, such as those developed in India and Russia, but are not extensively grown here. Dill can be grown in most soil types in all areas of the United States, but most of the production is centered in Oregon, Washington, Florida, and California.
Industry:Science
An annual herb (<i>Ocimum basilicum</i>) of the mint family (Labiatae), grown from seed for its highly scented leaves. It is sold fresh or dried, and its essential oil is used in pharmaceuticals and flavoring. The genus <i>Ocimum</i> has approximately 150 species, many of which are also grown as “basil.”
Industry:Science
An annual herb, <i>Chenopodium quinoa</i> (family Chenopodiaceae), 4–6 ft (1.2–1.8 m) tall, a native of Peru, and the staple food of many people in South America. These plants, grown at high altitudes, produce large quantities of highly nutritious seeds used whole in soups or ground into flour, which is made into bread or cakes. The seeds are also used as poultry feed, in medicine, and in making beer. The ash is mixed with coca leaves to flavor them as a masticatory. In the United States the leaves are sometimes used as a substitute for spinach.
Industry:Science
An annual, short-day, herbaceous plant (<i>Hibiscus cannabinus</i>) of the Malvaceae family, cultivated for its stem fibers. The genus <i>Hibiscus</i> has approximately 200 species, of which one, roselle (<i>H. sabdariffa</i> var. <i>altissima</i>), also is occasionally referred to as kenaf.
Industry:Science
An annual, warm-season grass of tropical origin said to have been grown in Egypt since early times, though its value was first recognized in Sudan only in 1909. In that same year it was introduced into the United States as a replacement for johnsongrass, which had become a noxious weed in many southern states. Sudangrass (<i>Sorghum bicolor</i> var. <i>sudanense</i>, also called <i>S. sudanense</i> and <i>S. vulgare</i> var. <i>sudanense</i>) requires warm temperatures for good production, and therefore it is not well adapted to the more northern areas of the United States except as a short-season hay crop. Sudangrass does best on a rich loam, but it has been grown successfully on a broad range of soils. Cold, poorly drained soils are particularly unsuited for sudangrass.
Industry:Science
