tracer element

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tracer element

[′trā·sər ‚el·ə·mənt]

(chemistry)

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References in periodicals archive ?

First, the BTM ranks tracer elements according to their food-to-soil (F/S) ratios, defined as the mass of the tracer element ingested from food over a 1-d period divided by the mass of the tracer element in 1 g of soil.

In short, SIR data based on each tracer element were characterized by a skewed distribution, high variation, and some outliers.

Estimates of soil ingestion in a population of Chinese children

(MAST), has unveiled that a second, American based, oil company has awarded MAST a USD $4,000,000 contract to evaluate our nanoparticles as a potential tracer element in their secondary oil recovery operations.

MAST EVALUATES NANOPARTICLES FOR TRACER ELEMENTS

It can detect tracer elements with much greater sensitivity.

If rocks could talk ... The ion microprobe extracts hidden clues about our planet's history and evolution

In other words, a new set of tracer elements was inserted every time the melt front advanced by 2% of the nodes in the axial direction.

Since the flow velocity near the center is faster than the average velocity, some of the tracer elements will reach and pass the melt front.

Computational prediction of PVC degradation during injection molding in a rectangular channel

Briefly, elements were excluded from the source apportionment modeling if > 90% of the samples had values below the MDL unless they were important tracer elements for potential source types.

Tracer elements used to identify motor vehicle emissions were BC, zinc (Zn), lead (Pb), copper (Cu), and bromine (Br).

Sources of fine particulate matter and risk of preterm birth in Connecticut, 2000-2006: a longitudinal study

From April 1997 through March 1998, samples of inhalable particles were collected, separated into fine and coarse particulate mode, and analyzed for black carbon and tracer elements. At the same time, we examined daily records of children (< 13 years of age) and elderly people (> 64 years of age) admitted to the hospital because of respiratory diseases.

Three-day moving averages of BC, PM, and their main tracer elements were used to estimate the effects on respiratory morbidity.

The impact of sugar cane-burning emissions on the respiratory system of children and the elderly

To confirm the univariate analyses, we fit a multivariate model to each response, using multiple tracer elements of previously defined pollution sources (Clarke et al.

To ensure that results were not sensitive to the element representing a particular source, we carried out sensitivity analyses in which models with alternative tracer elements were fit to the data.

Inhalation of concentrated ambient air particles exacerbates myocardial ischemia in conscious dogs. (Research)

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