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FENETRE EAU [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2007-03-30

English

Subject field(s)
  • Glaciology
  • Meteorology
DEF

Open water in a predominantly frozen river [which] is caused by warmer water from a spring or tributary, or by turbulence over a shoal.

French

Domaine(s)
  • Glaciologie
  • Météorologie
DEF

Surface d'eau dans une rivière à surface presque entièrement gelée.

OBS

Cette surface non gelée est due à l'eau relativement chaude d'une source ou d'un tributaire ou encore à la turbulence d'eau peu profonde.

Spanish

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Record 2 2001-06-13

English

Subject field(s)
  • Atomic Physics
CONT

Every element absorbs X rays in a distinctive manner. At X-ray wavelengths between 23 and 44 angstroms, oxygen-and therefore water-is much more transparent to radiation than is organic material. This fact opens up the possibility of discerning features through water, which makes up about three quarters of the mass of most cells. This part of the X-ray spectrum, called the water window, is quite useful for biological microscopy.

French

Domaine(s)
  • Physique atomique
CONT

Compte tenu de la faible absorption par l'eau dans la gamme d'ondes 2,4-4,4 nm (la fenêtre d'eau) et du contraste créé par les rayons X entre C, N et O, des échantillons vivants (l'intérieur de cellules, par exemple) peuvent être étudiés. Le potentiel est considérable en biologie et médecine. Le contraste dû aux différentes caractéristiques d'absorption des éléments chimiques peut être utilisé pour obtenir des images haute résolution et tridimensionnelles de structures internes (os ou tissus, par exemple).

Spanish

Campo(s) temático(s)
  • Física atómica
CONT

[...] Este hecho abre la posibilidad de distinguir estructuras a través del agua que forma alrededor de las 3/4 partes de la masa de las células. Esta zona del espectro de los rayos X se denomina ventana del agua [...]

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