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TRACE RECORDER [4 records]

Record 1 2010-03-12

English

Subject field(s)
  • Weather Stations and Meteorological Instruments and Equipment
DEF

Instrument for measuring the precipitation that is too light to be measured by an ordinary raingauge.

French

Domaine(s)
  • Stations, instruments et équipements météorologiques
DEF

Instrument indiquant les précipitations trop faibles pour être détectées par un pluviomètre ordinaire.

Spanish

Campo(s) temático(s)
  • Estaciones, instrumentos y equipos meteorológicos
DEF

Instrumento para medir la precipitación que es demasiado débil para que se registre en un pluviómetro ordinario.

Save record 1

Record 2 2004-11-03

English

Subject field(s)
  • Vulcanology and Seismology
  • Geophysics
  • Geological Research and Exploration
  • Electric Generating Systems
DEF

A geological research device which employs an electrical spark discharge to form the outgoing signal and produces a trace in the recorder showing the subbottom strata.

French

Domaine(s)
  • Volcanologie et sismologie
  • Géophysique
  • Recherches et prospections géologiques
  • Groupes électrogènes
DEF

Appareillage de sismique marine donnant la structure des premiers niveaux du fond des mers à l'aide d'une onde de choc produite par un arc électrique.

Spanish

Campo(s) temático(s)
  • Vulcanología y sismología
  • Geofísica
  • Investigaciones y prospecciones geológicas
  • Grupos electrógenos
Save record 2

Record 3 1996-05-13

English

Subject field(s)
  • Analytical Chemistry
DEF

A device for the extremely sensitive measurement of the refractive index of liquids; used as a detector in liquid chromatography.

CONT

The most universal continuous detector for liquid chromatography is the differential refractometer. This detector is universal only to the extent that one can select an eluent the refractive index of which differs from that of the solutes. Pure eluent flows through one cell of the detector while column effluent flows through the other cell. When a solute with a refractive index different from that of the solvent enters the detector, an imbalance occurs, which is transmitted to the recorder. The differential refractometers are relatively insensitive to trace and minor components, and detector stability is greatly affected by small temperature and flow fluctuations, thus requiring very good flow and temperature controls.

French

Domaine(s)
  • Chimie analytique
CONT

Le réfractomètre différentiel mesure en continu la différence d'indice de réfraction entre la phase mobile et l'effluent de la colonne chromatographique. La limite de détection dépend à la fois de la nature du soluté et de celle de la phase éluante.

Spanish

Save record 3

Record 4 1996-04-19

English

Subject field(s)
  • Analytical Chemistry
CONT

Operation at any sample loading level in which the objective is a recorder trace representing the components present; identification is made by comparing the characteristic elution volumes of known standards.

French

Domaine(s)
  • Chimie analytique
CONT

Un corollaire de la chromatographie analytique, laquelle est liée aux théories de la séparation, est la possibilité de mesurer des constantes thermodynamiques à l'aide de solutés et de phases stationnaires connus. C'est une méthode en apparence beaucoup plus simple et rapide que les procédés de mesures statiques généralement utilisées pour de telles constantes. Elle nécessite néanmoins de disposer d'appareils plus complexes que ceux employés pour la chromatographie analytique classique.

Spanish

Save record 4

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