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MATRIX ENVIRONMENT [10 records]

Record 1 2015-03-23

English

Subject field(s)
  • Wastewater Treatment
CONT

A sludge granule is an aggregate of microorganisms forming during wastewater treatment in an environment with a constant upflow hydraulic regime. In the absence of any support matrix, the flow conditions create a selective environment in which only those microorganisms, capable of attaching to each other, survive and proliferate.

French

Domaine(s)
  • Traitement des eaux usées
CONT

L'existence d'un débit optimal de production de biogaz a été mise en évidence dans tous les cas. Ce débit optimal dépend de la vitesse de liquide et des caractéristiques des granules de boues (taille et densité). La vitesse de liquide permettant d'atteindre ce débit optimal est d'autant plus faible que la taille du granule est grande et correspond en fait à un transfert optimal de substrat dans le granule.

Key term(s)
  • granule de boue

Spanish

Save record 1

Record 2 2013-02-06

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Environmental Studies and Analyses
DEF

A container prepared in the laboratory using reagent water or other blank matrix and sent with the sampling personnel for exposure to the sampling environment to verify possible contamination during sampling.

OBS

field blank: term and definition standardized by ISO.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Études et analyses environnementales
DEF

Récipient préparé dans le laboratoire utilisant comme réactif de l'eau ou toute autre matrice de blanc, et destiné à être emporté par le personnel d'échantillonnage sur le terrain, pour être exposé à l'environnement dans lequel l'échantillonnage est effectué afin de vérifier l'absence de contamination au cours de l'échantillonnage.

OBS

blanc de terrain : terme et définition normalisés par ISO.

Spanish

Save record 2

Record 3 2012-02-16

English

Subject field(s)
  • Biochemistry
  • Biotechnology
CONT

Immobilization can result in significant changes in the properties of enzymes in comparison with the properties of the soluble enzyme. It is likely that the properties of the immobilized enzyme are nearer to the in vivo properties since dilute soluble enzyme studies normally ignore the complex realities of the intracellular environment. Immobilized enzyme systems can simulate some of these realities, e. g. generation of localized microenvironment, diffusional restrictions, partitioning of substrates, products, coenzymes, etc.... Several workers have observed that the close proximity of the immobilized enzyme to its support matrix is a major contributing factor to changes in the properties of enzymes when they are immobilized.

French

Domaine(s)
  • Biochimie
  • Biotechnologie
CONT

En thérapeutique, l'emploi déjà ancien d'enzymes solubles est d'un usage courant, par exemple l'ingestion orale d'enzymes dans les déficiences digestives, l'injection d'enzymes pouvant intervenir dans certains troubles de la coagulation sanguine. Le champ d'utilisation, de plus en plus varié, ne fera que s'élargir, et de nouvelles applications sont à prévoir ou déjà en cours.

Spanish

Campo(s) temático(s)
  • Bioquímica
  • Biotecnología
OBS

Tradicionalmente, la Real Academia Española (RAE) admitía únicamente el género femenino para el sustantivo enzima; así fue hasta 1984, fecha en que pasó a considerarlo de género ambiguo, que puede funcionar por igual como masculino y como femenino. El uso, no obstante, parece haberse decantado claramente en español por el femenino, que hoy se emplea en el 90% de los casos [...]

Save record 3

Record 4 2010-09-21

English

Subject field(s)
  • Scientific Research Equipment
CONT

... the polymer matrix provides the enzyme with a microenvironment which may differ in many respects(e. g. pH, substrate concentration) from the solvent in which the immobilized enzyme is suspended.... An interesting proposed analytical application is the use of enzymes as "molecular probes" for determining the microenvironment of supports(water-soluble or water-insoluble). Because an immobilized enzyme will behave in accordance with its local environment, a determination of specific enzymic properties(usually activity) can reveal the nature of its immediate environment.

French

Domaine(s)
  • Matériel et équipement (Recherche scientifique)

Spanish

Save record 4

Record 5 2006-08-02

English

Subject field(s)
  • Routes of Administration (Pharmacology)
CONT

A polymer and active agent have been mixed to form a homogeneous system, also referred to as a matrix system. Diffusion occurs when the drug passes from the polymer matrix into the external environment.

French

Domaine(s)
  • Voies d'administration (Pharmacologie)
DEF

Système dans lequel le principe actif est réparti uniformément dans un polymère solide.

CONT

Il existe également deux systèmes transdermiques, le patch réservoir (contenant un solvant alcoolique permettant la solubilisation du principe actif et donc son passage cutané) et le patch matriciel (sans solvant alcoolique, le 17-bêta-oestradiol étant présent sous forme cristalline dispersé dans le polymère du système matriciel).

Spanish

Save record 5

Record 6 2006-05-03

English

Subject field(s)
  • Paints and Varnishes (Industries)
  • Crop Protection
  • Ship Maintenance
CONT

Two kinds of TBT-containing paints are known. Free-association paint, made by mixing TBT into the paint, dissolves when it contacts water. All of the TBT is leached out from the paint in 12-24 months. In copolymer paint, the TBT is bound to the paint and slowly releases with water movement, and is effective for five to six years ...

CONT

Historically, tributyltin(TBT) free-association paints were used. Free association paints are where the active ingredients are dispersed in a resinous matrix and from which they can slowly leach. This type of paint system has been the basis of most traditional antifouling paints... It is difficult to control the rate of release of biocides from a free-association paint system so as to provide a constant leaching level. Paints containing freely associated biocides such as copper compounds and TBT, can give rise to high initial concentrations of biocides in the marine environment.

Key term(s)
  • tributyltin based free association paint
  • tributyltin based free-association paint
  • tributyltin free association paint

French

Domaine(s)
  • Peintures et vernis (Industries)
  • Protection des végétaux
  • Entretien des navires
CONT

Années 70. Apparition de peintures antisalissures de libre association à base de tributylétain.

Spanish

Save record 6

Record 7 2002-11-18

English

Subject field(s)
  • Acoustics (Physics)
  • Space Centres
  • Orbital Stations
CONT

Developed specifically for use in the microgravity environment, the Space DRUMSÖ(Dynamically Responding Ultrasonic Matrix System) facility uses an acoustic levitation process that enables large fluid or solid material samples to be positioned and held stably in microgravity while they are being processed on the space station. Called containerless processing, this leading-edge system of dynamic acoustic beam positioning prevents the samples from touching the walls of their containers, thus avoiding defects or contamination.

French

Domaine(s)
  • Acoustique (Physique)
  • Centres spatiaux
  • Stations orbitales
CONT

Mis au point spécifiquement pour utilisation en conditions de microgravité, le module Space DRUMSÖ (Dynamically Responding Ultrasonic Matrix System) utilise un procédé de lévitation acoustique qui permet de positionner et de stabiliser de gros échantillons de matières liquides ou solides dans des conditions de microgravité pendant leur traitement à bord de la station spatiale. Appelé traitement sans creuset, ce procédé de pointe utilisant le positionnement dynamique par rayon acoustique empêche les échantillons de venir en contact avec les parois de leurs contenants, ce qui prévient tout défaut et toute contamination.

Spanish

Save record 7

Record 8 1997-04-15

English

Subject field(s)
  • Ecosystems
CONT

The matrix of biodiversity. Organisms do not and cannot live separate from the so-called physical environment of the Earth with which they are clearly in some sort of unity.

French

Domaine(s)
  • Écosystèmes
CONT

La matrice de la biodiversité : Les organismes ne vivent pas et sont incapables de vivre séparés du «milieu physique» que leur procure la Terre et avec lequel ils sont de toute évidence intimement liés.

Spanish

Save record 8

Record 9 1988-01-20

English

Subject field(s)
  • Environmental Studies and Analyses
  • Ecology (General)
CONT

Apart from the interaction matrix... and a preliminary, qualitative food web model, no attempt appears to have been made to construct a conceptual model of the natural environment of the Davis Strait.

French

Domaine(s)
  • Études et analyses environnementales
  • Écologie (Généralités)

Spanish

Save record 9

Record 10 1988-01-19

English

Subject field(s)
  • Environmental Studies and Analyses
  • Ecology (General)
CONT

Apart from the interaction matrix... and a preliminary, qualitative food web model, no attempt appears to have been made to construct a conceptual model of the natural environment of the Davis Strait.

French

Domaine(s)
  • Études et analyses environnementales
  • Écologie (Généralités)
OBS

Le terme "chaîne alimentaire" correspond au terme anglais "food chain".

Spanish

Save record 10

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