Assay sentence example

assay
  • The method is sometimes employed in the assay of gold.
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  • The assay of an ore for gold or silver consists of two operations.
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  • In 1864 a public assay office was established.
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  • Pieces are cut out for assay, and the bars are then ready for rolling.
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  • Helena is delightfully situated with Mt Helena as a background in the hollow of the Prickly Pear valley, a rich agricultural region surrounded by rolling hills and lofty mountains, and contains many fine buildings, including the state capitol, county court house, the Montana club house, high school, the cathedral of St Helena, a federal building, and the United States assay office.
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  • Both the St Francois and Jasper ores yield from 70 to 75% of metal in final product, and assay even higher.
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  • Varrentrapp pointed out that " cornets " from the assay of gold may retain gas if they are not strongly heated.
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  • The receipt of bullion and the delivery of coin from the Mint is under the charge of the chief clerk, the manufacture of coin is in the hands of the superintendent of the operative department, and the valuation of the bullion by assay, and matters relating to the fineness of the coin are entrusted to the chemist and assayer.
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  • There are several public assay offices in Italy for silk; the first in the world was established in Turin in 1750.
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  • The methods used in the assay for iron are volumetric, and are all based on the property possessed by certain reagents of oxidizing iron from the ferrous to the ferric state.
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  • Sefstrom's blast furnace, used in Sweden for the assay of iron ores, is a convenient form of portable furnace applied to melting in crucibles.
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  • The metals he produced are said to have proved genuine on assay; when, however, in the following year he was challenged to repeat the experiments he was unable to do so and committed suicide.
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  • There is a United States assay office, established as a branch mint in 1837, during the days of North Carolina's great importance as a gold producing state, and closed from 1861 to 1869.
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  • The "dry" or fire assay for lead is largely used for the valuation of lead ores, although it is being gradually replaced by volumetric methods.
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  • In 1859 the mines were worked only for their gold; the ignorant miners threw away the " black stuff " which was really valuable silver ore with an assay value four times as great as that of their ores of gold; and when this was discovered there came a period of unprecedented silver production.
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  • sensitivity of the assay.
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  • The principal buildings are the state capitol, the United States assay office, a Carnegie library, a natatorium, and the Federal building, containing the post office, the United States circuit and district court rooms, and a U.S. land office.
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  • To simplify calculation and to enable the assayer to use the metric system of weights employed in all chemical calculations, the "assay ton" ("A.T."
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  • = 29.166 grammes) has been devised, which bears the same relation to the ton of 2000 lb avoirdupois that one milligram does to the troy ounce; when one assay ton of ore is used, each milligram of gold or silver found represents one ounce to the ton.
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  • The fire assay for copper ores was abandoned years ago and the electrolytic method took its place; this in turn is now largely replaced by volumetric methods.
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  • Various portions, each weighing 10 seers (of 23 5 lb), are selected by test assay so as to ensure the mass being of standard consistence (70% of the pure dry drug and 30% of water), and are thrown into shallow drawers and kneaded together.
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  • The .amount of ore taken for assay is generally one-half "A.T.," but in very low-grade ores one, two, and sometimes even four "A.T.s" are used.
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  • A third addition becomes necessary to remove the rest of the silver, when the lead will assay only o I oz.
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  • The goldsmiths had the assay of metals, the fishmongers the oversight of fish, the vintners of the tasting of wine, &c. The companies enforced their regulations on their members by force.
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  • the principal officers of the Mint were the master, who manufactured the coin under a contract, the warden or paymaster who acted on behalf of the Crown, the assay master (also a king's officer) who was responsible for the fineness of the coin, the cuneator or superintendent of the engravers of the dies, and the moneyer.
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  • A positive result has been obtained in a mouse lymphoma assay 13,14.
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  • assay for clastogenicity.
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  • As the slag thus formed flows off to the sides of the scorifier, the assay clears and the melted metallic lead forms an "eye" in the middle.
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  • Ores containing much arsenic or sulphur are generally roasted at a low heat and the assay is made on the roasted material.
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  • One gramme of ore is usually taken for assay and treated in a small flask or beaker with 10 cc. of hydrochloric acid.
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  • assay in the mouse.
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  • Bullion, whether in the form of coins, or of bars and ingots stamped, is subject, as a general rule of the London market, not only to weight but to assay, and receives a corresponding value.
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  • Alwar was the first native state to accept a currency struck at the Calcutta mint, of the same weight and assay as the imperial rupee, with the head of the British sovereign on the obverse.
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  • At present all gold bullion brought to the Mint is weighed and portions are cut off for assay.
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  • One of the customs which has grown out of our peculiar system of weights is the form of statement of the results of such an assay.
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  • Will the assay results provide any clues not only to possible sources but also to purity or the possible adulteration of the specimens?
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  • A reliable assay is needed to be able to measure binding affinity.
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  • The comparator was an enzyme-linked immunosorbent assay (ELISA ).
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  • assay evaluability rate for primary lung cancers was only 11% .
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  • A negative result had been reported in an adequate oral bone marrow mouse micronucleus assay.
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  • Furthermore the Committee felt that there was little to be gained by the additional in-vitro assay for DNA damage.
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  • A similar result was obtained by Kinghorn & Evans (1975a) with the latex using a mouse ear irritancy assay.
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  • assay in human lymphocytes may not be sufficiently sensitive or appropriate for detecting smoking induced mutations.
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  • assay for the specific detection of Peptostreptococcus magnus in oral clinical specimens.
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  • Comet assay results were given for 8 organs in the mouse with 208 chemicals for which carcinogenicity bioassay data were available.
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  • However, the luciferin-luciferase bioluminescence assay proved extremely reliable and suitable for automation.
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  • PTH assay was either elevated or inappropriately normal for the serum calcium in all patients tested.
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  • chromatid exchange assay was not considered further.
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  • comet assay.
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  • cooper's workshop, an assay laboratory, and a Victorian schoolroom & playground.
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  • cytogenetics assay, where the cell is the statistical unit.
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  • equivocal weakly positive results were obtained in the mouse lymphoma assay.
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  • Further consideration was given to the negative results in the single dose UDS assay in the forestomach of mice using gavage dosing.
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  • immunofluorescence assay.
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  • Members stated that the 72 hour incubation period used in the micronucleus assay was inappropriate.
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  • ligase chain reaction assay.
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  • Members expressed concerns that the in-vivo rat liver UDS assay had not been conducted to modern standards.
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  • luciferase reporter assay.
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  • Relative luciferase activity of NFKBIA -689 T type was also significantly higher than A type using luciferase activity of NFKBIA -689 T type was also significantly higher than A type using luciferase assay.
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  • lymphocyte proliferation assay.
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  • lymphoma assay 20.
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  • Negative results in such an assay would provide full reassurance with regard to oral exposure of rats to technical grade malathion.
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  • marrow mouse micronucleus assay.
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  • The effect of the alkaloid was also tested in an in vivo assay using BALB/c mouse bone marrow cells.
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  • micronucleus assay.
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  • In the first instance this should be in the in-vivo bone marrow micronucleus assay.
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  • Indicate that the Committee believes that routine screening for aneugenicity is possible using the in vitro micronucleus assay with centromeric staining.
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  • Of interest is the Dynabeads assay, an alternative method for providing CD4 cell counts using anti-CD4 monoclonal antibody-coated magnetic beads.
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  • In 1995 the Committee assessed all the available published literature on the use of this assay to detect chemical mutagens.
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  • mutagens used were gamma-irradiation and hydrogen peroxide and the DNA effects were determined with the micronucleus test and the comet assay.
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  • mutation assay in Salmonella.
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  • These are: Sample now non-reactive in the current screening assay at the Transfusion Center, and confirmed negative at the designated reference laboratory.
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  • No single activated oncogene can be detected in a transformation assay.
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  • Biochemical and molecular approaches are used to assay mediator release and to identify and manipulate proteins required for movement and exocytosis of secretory organelles.
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  • The potential of uveal melanoma cell lines to convert plasminogen to angiostatin was tested in an in vitro assay.
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  • reactive in a microbiology assay.
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  • reporter assay methods to quantify gene expression and immunological techniques to measure protein concentrations.
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  • reticulate bodies in an enzyme-linked immunosorbent assay.
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  • screening assay at the Transfusion Center, and confirmed negative at the designated reference laboratory.
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  • sensitivity assay is essential.
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  • A minimum of five normal sera should be used to determine the normal range in a given assay.
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  • A cell culture assay is a lab test performed on a biopsy specimen containing living cancer cells.
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  • telomerase assay.
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  • throughput assay procedures.
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  • The mouse vas deferens turned out to be an extremely sensitive quantitative assay for CB1 agonists.
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  • CHANGE Reinstatement of donors whose serum has been confirmed to be falsely reactive in a microbiology assay.
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  • This research in the area of molecular biology, involved reporter assay methods to quantify gene expression and immunological techniques to measure protein concentrations.
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  • We demonstrated that Chp2 binds both C. abortus elementary bodies and reticulate bodies in an enzyme-linked immunosorbent assay.
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  • Further Development and Commercialisation Further clinical sampling is required to refine the sensitivity of the assay.
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  • In such cases a laboratory analysis and sensitivity assay is essential.
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  • Two cases of breast carcinoma and two cases of ovarian carcinoma were also included as positive controls in the telomerase assay.
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  • These studies are aimed at developing high throughput assay procedures.
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  • Indirect immunofluorescent antibody assay (or IFA) test can only find the secondary stage of the virus.
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  • Your veterinarian will likely use an ELISA (enzyme-linked immunosorbent assay) test.
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  • If the feline leukemia test is positive, your veterinarian will likely follow up with more definitive testing using a immunofluorescence assay (IFA).
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  • Unlike the preliminary test, this test or assay will need to be sent out to a lab for further analysis.
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  • Any puppy or dog suspected of suffering from parvo should undergo an enzyme-linked immunosorbent assay antigen test (ELISA), commonly called the CITE test.
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  • A liver biopsy may be performed to test for levels of enzymes present (aldolase assay) and to evaluate the extent of damage to the liver.
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  • Immunological tests such as Enzyme-linked immunosorbent assay (ELISA) are also widely used for diagnosis, and several commercial kits are available.
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  • A related blood test, fructosamine assay, measures the amount of albumin in the plasma that is bound to glucose.
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  • This screening procedure is referred to as the Guthrie test (Guthrie bacterial inhibition assay).
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  • Radioallergosorbent assay test (RAST) or skin testing can identify food hypersensitivity.
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  • If the ring has been hallmarked, then the metal has actually been tested by an independent assay office, thus giving you an assurance of what you are buying.
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  • These rings are created in 14k and 18k gold and hallmarked by the Irish Assay Office.
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  • ==Zinc== Chemically the ores of zinc consist of the silicates, carbonates, oxides, and sulphides of zinc associated with other metals, some of which complicate the methods of assay.
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  • Internal quality control was performed by regular analyzes of stored plasma aliquots, and was satisfactory during the assay period.
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