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 ?
One real benefit of these systems, particularly of the organotypic in vitro preparations, is that the manifestation of toxicity can be extrapolated immediately to the manifestation in vivo; for example, corneal damage in the enucleated eye corresponds directly to potential corneal damage in vivo (although it must be recognized that these assays do not address the key parameter of recovery), or a neural tube defect in whole-embryo culture is expected to predict the potential for a limb defect in vivo.
For 12 samples positive for both assays, 90% and 50% inhibitory concentration (I[C.
On these grounds, Ennever says, the Ames test would not surpass the other three assays in the SCIENCE paper.
To obtain FMF approval, PerkinElmer was required to provide clinical data to prove the clinical validity of the assays, to demonstrate a commitment to prenatal screening, and to provide evidence of the successful use of assays in respected international studies.
His main interests are translational research to develop novel diagnostic assays based on physiological and immune host responses, tools for clinical monitoring of immune reconstitution, and broad-spectrum immunostimulants.
The definitive respiratory virus culture testing can require up to two days and most PCR-based tests are either commercially unavailable for certain viruses or hospital laboratories do not have the technical staff and specialized equipment required to develop home-brew assays.
Two days later, the New York City Department of Health reported the following: results of the direct fluorescent-antibody (DFA) assay, using fluorescein-labeled monoclonal antibodies specific to the B.
Brevetoxin activity determined by receptor assay increased to 25 [+ or -] 7.
PathHunter[TM] [eth]-Arrestin Assays are the first chemiluminescent GPCR assays that measure the activation of Gi, Gs and Gq coupled receptor signaling by direct arrestin recruitment--rather than through a secondary messenger.
Using a reporter gene assay, we conducted initial characterization of the ATP receptor through analog specificity studies using P2X receptor agonists and antagonists with differing receptor subtype selectivity.