gas tracer

gas tracer

[¦gas ′trā·sər]
(mining engineering)
Dust clouds, chemical smoke, or gaseous or radioactive tracers used to detect slowly moving air currents in a mine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, tracheotomy was still required for gas tracer administration and the rats underwent arterial blood sampling during the PET scan, which might be considered a limitation in the above study.
However, there are several issues that remain unresolved for the ideal achievement of noninvasive quantification of OEF and CMR[O.sub.2] in living rats by PET using [sup.15]O gas tracers; these include tracheotomy, arterial blood sampling, and long experimental time.
The company's fracture fluid identifier tracers, oil-soluble tracers and Natural Gas Tracers, enable efficient, cost-effective downhole diagnostics, providing oil and gas operators with critical data to efficiently optimise reservoir development and production.
Still, scientists believe ALMA will make transformational leaps possible in the understanding of the universe, enabling a hunt for so-called cold gas tracers, the ashes of exploded stars from a time about a few hundred million years after the Big Bang that astronomers call "cosmic dawn."