Active hydrogen

hydrogen in the form of single atoms, rather than molecules, which makes it extremely reactive.

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  • Active hyperemia

    active hyperemia active hyperemia n. hyperemia due to increased flow of arterial blood in dilated capillaries. also called arterial hyperemia, fluxionary hyperemia. historical examples the first two produce venous or p-ssive hyperemia, and the third, arterial or active hyperemia. surgery, with special reference to podiatry maximilian stern

  • Active ingredient

    noun the chemically active part of a chemical compound contemporary examples i take a triptan called treximet, which also includes a dose of the painkiller naproxen, the active ingredient in aleve. presidents can have migraines dana goldstein july 19, 2011 the national inst-tute on drug abuse reports the prevalence of mdma (the active ingredient in […]

  • Active language i

    active language i tool, mathematics an early interactive mathematics system for the xds 930 at the university of california at berkeley. [“active language i”, r. de vogelaere in interactive systems for experimental applied mathematics, a-p 1968]. (1994-11-08)

  • Active layer

    (in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer. historical examples in the formation of the organs of sense the nervous layer shews itself throughout as the active layer. the works of francis maitland balfour, volume iii (of 4) francis maitland balfour

  • Active list

    noun (military) a list of officers available for full duty historical examples he had just been promoted general of brigade when he was removed from the active list as being of n-ble birth. encyclopaedia britannica, 11th edition, volume 7, slice 10 various these are the active list, and they alone hold office and vote. socialism […]

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