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element specific activity

См. также в других словарях:

  • specific activity — 1. activity per unit weight of a radioactive material, or the activity of a radioisotope per unit weight of the element (including stable isotopes) present. 2. the catalytic effect of an enzyme expressed as units per milligram of enzyme …   Medical dictionary

  • activity — 1. In electroencephalography, the presence of neurogenic electrical energy. 2. In physical chemistry, an ideal concentration for which the law of mass action will apply perfectly; the ratio of the a. to the true concentr …   Medical dictionary

  • Specific heat of a substance at any temperature — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… …   The Collaborative International Dictionary of English

  • Nuclear properties of selected transuranium element isotopes — ▪ Table Nuclear properties of selected transuranium element isotopes specific activity name and mass principal decay mode half life disintegrations per minute per microgram watts per gram* neptunium 237 alpha 2.14(106) years 1565 2.07(10−5)… …   Universalium

  • chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium

  • Myocyte-specific enhancer factor 2A — Myocyte enhancer factor 2A PDB rendering based on 1c7u …   Wikipedia

  • Network element — A network element is usually defined as a manageable logical entity uniting one or more physical devices. This allows distributed devices to be managed in a unified way using one management system. According to Telecommunications Act of 1996, the …   Wikipedia

  • Far upstream element-binding protein 1 — Far upstream element (FUSE) binding protein 1 PDB rendering based on 1j4w …   Wikipedia

  • transition element — Chem. any element in any of the series of elements with atomic numbers 21 29, 39 47, 57 79, and 89 107, that in a given inner orbital has less than a full quota of electrons. Also called transition metal. [1920 25] * * * Any chemical element with …   Universalium

  • Transposable element — A bacterial DNA transposon Transposable elements (TEs) are sequences of DNA that can move or transpose themselves to new positions within the genome of a single cell. The mechanism of transposition can be either copy and paste or cut and paste .… …   Wikipedia

  • rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

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