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POROUS MATRIX [4 records]

Record 1 2010-02-16

English

Subject field(s)
  • Microbial Ecology
DEF

A small, immobilized bed, microbe bioreactor.

CONT

The bioreactor "plug" is made of slotted PVC pipe which is screw cap sealed at each end. Each plug is loaded with an inert porous material which serves as a structural support matrix for the microorganisms. The seed cultures in the bioplugs are a mixture of microorganisms selected for their abilities to biodegrade the contaminants of concern... The bioplugs are strategically inserted into the contaminated zone(s). Liquids then flow through the plugs by a pressure gradient created using compressed air. This flow acts to accelerate the movement of ground or irrigation water through the immobilized bed; thereby, facilitating the mineralization of organics within the aqueous phase and the bulk generation of biomass which bleeds off the bed.

French

Domaine(s)
  • Écologie microbienne
OBS

Terme concocté après discussion avec le département des affaires industrielles pour l'environnement de l'Institut de recherche en biotechnologie.

Spanish

Save record 1

Record 2 1997-11-27

English

Subject field(s)
  • Hydrology and Hydrography
DEF

Property of a porous matrix to cause spreading of a tracer travelling through it.

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Capacité d'un milieu poreux à provoquer la dispersion d'un traceur qui se déplace à travers lui.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
DEF

Propiedad de un medio poroso de originar la dispersión de un trazador que fluye a través de él.

Save record 2

Record 3 1996-06-27

English

Subject field(s)
  • Hydrology and Hydrography
DEF

Permeable medium containing connected interstices which may be considered as a continuous medium with respect to its hydraulic properties.

Key term(s)
  • porous media

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Milieu perméable comportant des vides interstitiels interconnectés, assimilable à un milieu continu du point de vue de ses propriétés hydrauliques.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
DEF

Medio permeable que contiene intersticios conectados que pueden considerarse un medio continuo en lo que se refiere a sus propiedades hidráulicas.

Save record 3

Record 4 1991-09-05

English

Subject field(s)
  • Mechanical Construction
CONT

... the widely accepted theory of friction ... is that the best possible bearing material would be one which is fairly hard and resistant but which has an overlay of a soft metal that is easily deformed.

CONT

There are many different bearing materials. A large group of nonferrous bearing alloys has a soft, plastic matrix in which wear-resistant particles are embedded.... Copper alloys form another large group... aluminum alloys with special bearing qualities have found increased use. Other bearing materials include cadmium, silver, cast iron, porous bronze, ceramics, cermets..., and some very hard metals.

CONT

Rubber has proved to be a surprisingly good bearing material, especially under circumstances in which abrasives may be present in the lubricant.

French

Domaine(s)
  • Construction mécanique
CONT

Les matériaux les plus employés pour les coussinets de frottement sont les bronzes et les alliages blancs, à base d'étain.

OBS

L'équivalent français "antifriction" est recommandé par l'Office de la langue française.

Spanish

Save record 4

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