Assay


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Assay

Metal purity test to confirm that the metal meets the standards for trading on a commodities exchange (commodities exchange center).

Assay

To test precious metals for their purity. This is important to commodities and futures involving precious metals, in which the quality of the underlying metals must be specified in the contract.

assay

A test to determine the purity of gold, silver, or other precious metals. Metals used for delivery of futures contracts must be assayed to verify that they meet standards established by the exchange on which the contracts trade.
References in periodicals archive ?
This approach continues to have the limitation that not all mechanisms may be represented in the model, but unlike the high-throughput reporter gene assays described previously, expression of the cell's genome is almost certain to provide more information than a reporter gene assay about more mechanisms.
Our assay detected neutralizing antibodies generated during both the acute and convalescent phases of SARS infection.
To be recognized by the Fetal Medicine Foundation means that PerkinElmer has successfully demonstrated our common commitment to prenatal screening, and that our assays meet their strict criteria to be used in FMF certified laboratories.
Our in vitro rapid assay based on a short-time primary T-cell response was unable to show the residual memory T-cell response present in long-term vaccinated persons since the assay sensitivity is I log lower but could detect the higher frequencies of IFN-[gamma]--producing antigen-specific cells appearing a few weeks after smallpox vaccine inoculation (8).
Estrogenic activity of TCB and CCB in the presence or absence of a rat liver microsomal oxidation system was examined in the YES assay.
Both samples that had greater than the regulatory limit of brevetoxins according to the mouse bioassay (samples 2 and 3) also showed high levels of brevetoxins by ELISA and receptor binding assay (RBA).
Receptor-based assay and radioimmunoassay also have been used to monitor activity in shellfish and affected consumers (12).
Recent advances in assay chemistries and signal detection technology allow the miniaturization of cell-based assays, making it convenient to perform dose-response experiments during primary screens.
Oldach [heteroduplex mobility assay to verify both the species identification and uni-dinoflagellate culture status (16)] and P.
a provider of novel array-based gene expression assay technology and services for the life sciences industry, today announced results from a study measuring gene expression on marker genes have been published in the August 2006 issue of Toxicology in Vitro.