chemical tracer

chemical tracer

[′kem·i·kəl ′trā·sər]
(nucleonics)
A tracer having chemical properties similar to those of the substance with which it is mixed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A An effective diagnostic technique that ombines positron emission tomography (PET) scans of the brain with a chemical tracer that indicates the presence of beta-amyloid plaques, a hallmark of Alzheimer's disease (AD), has been developed.
The positron emission tomography (Pet) scans work by injecting a glucose like solution combined with a chemical tracer into the patient.
The objectives of the study were to (i) investigate the effects of soil matric suction (hence degree of saturation) on water flow and the concurrent bacterial and chemical tracer transport in intact soils, (ii) determine the effects of heterogeneity in undisturbed soils on bacterial transport and retention, and (iii) provide a framework and experimental methods for subsequent research into modelling bacterial transport in intact soils.
A chemical tracer of known concentration is added to the rill and by knowing the degree of dillution at a downstream sampling point, flow rate can be calculated.
(2002), who strongly suggested that their conservative chemical tracer and bacteria were transported via different pathways, and consequently chemical tracer parameters such as velocity, dispersivity, and effective porosity could not be used to model bacterial transport.
Relatively weak mixing in the upper ocean away from boundaries was, however, recently confirmed by a nontoxic chemical tracer release experiment in the Northeast Atlantic led by Jim Ledwell.
Researchers at the University of Delaware used chlorine isotopes as chemical tracers to determine the age and origin of groundwater in the Eastern Desert of Egypt.

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