TERMIUM Plus®

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

CASCADE REACTION [4 records]

Record 1 2010-04-01

English

Subject field(s)
  • Atomic Physics
  • Radiological Physics (Theory and Application)
DEF

A cascade reaction involving electrons in a region with a sufficiently high electric field.

OBS

This reaction must also occur in a medium that can be ionized, such as air. It is exploited in devices such as Geiger counters and Proportional counters to detect and measure the energy of an ionizing radiation. Incoming radiation ionizes one of the atoms or molecules in the medium.

French

Domaine(s)
  • Physique atomique
  • Physique radiologique et applications
CONT

Quand un rayonnement ionisant pénètre à l'intérieur du tube geiger-muller, il ionise le gaz, c'est-à-dire qu'il arrache des électrons, par effet Compton. Ces électrons se multiplient très vite par avalanche électronique, dite «avalanche de Townsend», rendant le gaz conducteur pendant un temps bref (phénomène de décharge) : les électrons sont accélérés par la haute tension, ils percutent des molécules de gaz et provoquent ainsi d'autres ionisations en cascade.

Spanish

Save record 1

Record 2 1999-10-05

English

Subject field(s)
  • Genetics
CONT

A Novel Mutation in the Sex Determining Region on Y(SRY) Gene as an Etiology of Familial Swyer Syndrome. Swyer Syndrome(SWY) is a failure of testicular differentiation that results in 46, XY sex reversed females. Unlike sporadic SWY, familial cases of SWY appear to be transmitted through 46, XX carrier females and maybe due to X-linked or autosomal genes downstream from SRY in the sexual differentiation cascade. Carriers of a mutation in SRY would be expected to be affected with SWY and be sterile. This report describes two siblings with SWY who have been previously found to have a normal SRY gene with polymerase chain reaction(PCR)

French

Domaine(s)
  • Génétique
DEF

Gène du chromosome Y qui joue un rôle important dans la détermination du sexe.

Spanish

Save record 2

Record 3 1996-10-29

English

Subject field(s)
  • Immunology
CONT

Allergy, Immune Complexes and the Complement Cascade. The complement system consists of a series of proteins which function as a triggered enzyme cascade and play an important role in inflammation.

OBS

Enzyme cascade.-The complement components interact with each other so that the products of one reaction form the enzyme for the next, thus a small initial stimulus can trigger an increasing cascade of activity.

French

Domaine(s)
  • Immunologie
CONT

La formation de pores met en jeu le «complexe d'attaque de membrane» de la cascade du complément. Il est formé de l'assemblée supramoléculaire des cinq derniers constituants (C5b, C6, C7, C8, C9), qui s'insère dans la membrane cible en formant des lésions tubulaires.

Spanish

Save record 3

Record 4 1991-12-10

English

Subject field(s)
  • Equipment (Chemistry)
  • Biomass Energy
OBS

cascade reaction flask : term taken from an advertising pamphlet.

French

Domaine(s)
  • Équipement (Chimie)
  • Énergie de la biomasse
CONT

Des copeaux de peuplier ont été liquéfiés uniquement en présence de vapeur sous pression et température élevée dans un réacteur en cascade.

Spanish

Save record 4

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