TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

SENSIBILIDAD RADIACION [2 records]

Record 1 2014-02-07

English

Subject field(s)
  • Radiological Physics (Theory and Application)
CONT

High brightness, short pulse width (<200 picoseconds) x-ray lasers now offer biologists the possibility of high-resolution imaging of specimens in an aqueous environment without the blurring effects associated with natural motion or chemical erosion. As a step toward developing the capabilities of this type of x-ray microscopy, a tantalum x-ray laser at a 44.83-angstrom wavelength was used together with an x-ray zone plate optic to image both unlabeled and selectively gold-labeled dried rat sperm nuclei. In the image, 500-angstrom features are clearly visible. This illustrates the importance of x-ray microscopy in determining chemical composition. X-ray microscopy also provides information about the uniformity of sperm chromatin organization and the extent of sperm chromatin hydration.

French

Domaine(s)
  • Physique radiologique et applications
OBS

La microscopie par rayons X utilise des «X mous» d'une longueur d'onde comprise entre 1 et 10 nm.

Spanish

Campo(s) temático(s)
  • Física radiológica (Teoría y aplicación)
CONT

La microscopía de rayos X ha emergido como técnica para observar estructuras que no son accesibles con microscopía óptica convencional, y que tiene ventajas respecto a la microscopía electrónica debido a la mayor longitud de penetración y a la sensibilidad química de la radiación X.

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Record 2 2003-06-03

English

Subject field(s)
  • Epidermis and Dermis

French

Domaine(s)
  • Épiderme et derme
DEF

Dystrophie cutanée, causée par une sensibilité anormale de la peau aux rayons lumineux, particulièrement aux ultraviolets, qui dégénère en kératose et en tumeurs malignes épithéliomateuses.

Spanish

Campo(s) temático(s)
  • Epidermis y dermis
DEF

Defecto genético muy raro en los mecanismos de inducción de la reparación de ADN. Se caracteriza por una alta sensibilidad a las fuentes de radiación ultravioleta(especialmente la luz solar).

OBS

Los principales síntomas son ceguera, sordera, reacción cutánea a los rayos solares y problemas del desarrollo.

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