- 行业: Printing & publishing
- Number of terms: 178089
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- 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.
Abnormal structures formed in the cytoplasm or the nucleus of the host cell (or both) during the multiplication of some viruses. These structures vary from virus to virus and may represent aggregations of mature virus particles but more often are areas where viral synthesis takes place. These areas of viral synthesis have an altered appearance when treated with typical diagnostic stains.
Industry:Science
Abnormal visual acuity. The term is used to describe visual acuity substantially less than normal. The World Health Organization defines visual impairment as acuity less than 20/60 (normal being 20/20). Most states in the United States, however, will not issue an unrestricted driver's license to persons having corrected vision less than 20/40; such persons generally require special aids to read fine print and to perform other visually demanding tasks. The legal definition of blindness in the United States is visual acuity of 20/200 or worse (or severely restricted peripheral vision). The World Health Organization defines blindness as visual acuity worse than 20/400.
Industry:Science
About 80% of the Earth's crust, the outermost layer, is of igneous origin, closely related to volcanism. Recent advances in volcanology include improved understanding of eruptive phenomena; refinements in techniques of volcano monitoring, data processing, and interpretation; demonstrated capability to mitigate volcano hazards; and direct assessment of the impact of large explosive eruptions on global climate.
Industry:Science
According to the established theory of the strong interaction, quantum chromodynamics (QCD), quarks and gluons are the fundamental building blocks from which atomic nuclei are assembled. The quark-gluon deep structure of nuclear matter is well concealed, however. Quarks and gluons are tightly packaged into protons and neutrons, which form the more conspicuous units. But theory predicts that under extreme conditions of high temperature or high density the physical nature of this matter changes drastically: Protons and neutrons dissolve. Quarks and gluons then become the obvious as well as the fundamental units of description. Physicists therefore speak of “quark-gluon matter.”
Industry:Science
Accounting for the sensations or “raw feels” which constitute conscious experience has been a persistent problem for scientific approaches to psychology. In addressing this problem, each new scientific approach has put forth a new account of the relationship between those conscious sensations, as they are privately experienced by individuals, and the nervous system, as it is experienced by scientists.
Industry:Science
Accoya<sup>TM</sup> is a new type of wood offering performance characteristics that enable it to replace less sustainable materials and nondurable wood species in exterior applications. Based on more than 80 years of research and development in the field of wood acetylation, combined with leading-edge technology, it is extremely durable, dimensionally stable, and highly reliable. It is also totally nontoxic, recyclable, and made from widely available sustainable wood resources. Accoya wood is now commercially available in Europe and will become available in the United States and other countries in due course.
Industry:Science
Acidic water drainage from both surface and underground mining waste is a source of pollution, since it often contains dissolved metals. Many new technologies for assessing and controlling mine water acidity have been tested in recent years.
Industry:Science
Acoelomates are triploblastic animals that lack an internal body cavity. Included in this group are the Acoela (acoel flatworms), which represent the earliest extant bilaterian metazoans holding a key position between the radially symmetrical animals and the more complex bilateral animals.
Industry:Science
Acoustic levitation has been applied as a technique for suspending liquid and solid samples of micrometer-to-millimeter range in the pressure nodes of a stationary ultrasonic field (SUSF). This effect was discovered in the 1930s and mainly developed in the 1970s and 1980s by the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA), who used this technique to fix small samples for various zero-gravity experiments in their space laboratories. However, in the last two decades acoustic levitation has also been applied as a useful and powerful tool for handling small samples under terrestrial conditions, that is, with gravity. Several investigations based on acoustic levitation have been carried out in different research areas, such as fluid dynamics, materials, atmospheric sciences, and analytical chemistry.
Industry:Science
Active immunization against a variety of microorganisms or their components, with the ultimate goal of protecting the host against subsequent challenge by the naturally occurring infectious agent.
Industry:Science
