background contamination

См. также в других словарях:

• Background radiation — This article is about ionizing radiation. For microwave background radiation from space, see Cosmic background radiation and cosmic background. Thermal radiation emitted by Earth is not considered in this category because it is not ionizing.… …   Wikipedia

• Radioactive contamination — The radiation warning symbol (trefoil) …   Wikipedia

• Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology …   Wikipedia

• Nokia water supply contamination — Location of Nokia in Finland Nokia water supply contamination refers to the events on November 28–29, 2007, when large parts of the water supply in Nokia, Finland, were contaminated when sewage water (with solids removed) became mixed with fresh… …   Wikipedia

• Spin contamination — In computational chemistry, spin contamination is the artificial mixing of different electronic spin states. This can occur when an approximate orbital based wave function is represented in an unrestricted form – that is, when the spatial parts… …   Wikipedia

• Cosmic microwave background experiments — [ Cosmic background (CMB) temperature on the celestial sphere as determined with the COBE satellite, (top) uncorrected, (middle) corrected for the dipole term due to our peculiar velocity, (bottom) corrected for contributions from the dipole term …   Wikipedia

• natural background — noun The radiation due to natural radioactivity and to cosmic rays, enhanced by contamination and fallout • • • Main Entry: ↑natural …   Useful english dictionary

• dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …   Universalium

• Ultra high vacuum — (UHV) is the vacuum regime characterised by pressures lower than about 10−7 pascal or 100 nanopascals ( 10−9 torr). UHV requires the use of special materials in creating the vacuum system, extreme cleanliness to maintain the vacuum system, and… …   Wikipedia

• BeppoSAX — Infobox Space telescope name = BeppoSAX caption = Artist s conception of BeppoSax in space (credit: the Agenzia Spaziale Italiana (ASI) and BeppoSAX Science Data Center (SDC)) organization = ASI / NIVR alt names = Satellite per Astronomia X… …   Wikipedia

• Cyanine — is a non systematic name of a synthetic dye family belonging to polymethine group. Cyanines have many uses as fluorescent dyes, particularly in biomedical imaging. Depending on the structure, they cover the spectrum from IR to UV. Cyanines were… …   Wikipedia