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extract

 [ek´strakt]
a concentrated preparation of a vegetable or animal drug.
allergenic extract an extract of allergenic components from a crude preparation of an allergen, such as weed, grass, or tree pollen, molds, house dust, or animal dander, used for diagnostic skin testing or for immunotherapy for allergy.
cell-free extract the solution obtained by rupturing cells and removing all particulate matter.

ex·tract

(eks-trakt'),
1. A concentrated preparation of a drug obtained by removing the active constituents of the drug with suitable solvents, evaporating all or nearly all of the solvent, and adjusting the residual mass or powder to the prescribed standard.
2. To remove part of a mixture with a solvent.
3. To perform extraction.
[L. ex-traho, pp. -tractus, to draw out]

extract

(ĭk-străkt′)
tr.v. ex·tracted, ex·tracting, ex·tracts
To draw or pull out, often with great force or effort: extract a wisdom tooth; used tweezers to extract the splinter.

ex·tract′a·ble, ex·tract′i·ble adj.
ex·trac′tor n.

extract

noun A concentrate of a drug, cells or a supernatant.

verb To obtain a thing—often concentrated or distilled—from a source.

extract

noun A concentrate of a drug, cells, or a supernatant. See Adrenal extract, Cell-free extract, Fluid extract, Green extract, Plasmid extract verb Psychology Obtain.

ex·tract

1. (ek'strakt) A concentrated preparation of a drug obtained by removing the active constituents with suitable solvents, evaporating all or nearly all of the solvent, and adjusting the residual mass or powder to the prescribed standard.
2. (ek-strakt') To remove part of a mixture with a solvent.
3. To perform extraction.
[L. ex-traho, pp. -tractus, to draw out]

ex·tract

(eks-trakt, ekstrakt)
1. To perform extraction.
2. A concentrated drug preparation obtained by removing active constituents of the drug with suitable solvents, evaporating all or nearly all solvent, and adjusting residual mass or powder to the prescribed standard.
[L. ex-traho, pp. -tractus, to draw out]
References in periodicals archive ?
A broad or wide-spectrum extract contains a large array of extracted constituents, while narrow-spectrum extracts have a much simpler chemical makeup.
Commercial extracts optimized for anthocyanin and silymarin complex content, respectively, do not represent the full complement of materials that can be extracted from the source botanical.
Residual oyster meat was used for ELISA and receptor binding analysis, whereby the oyster meat was defrosted and aliquoted into two portions: One portion was extracted with acetone and the other used as homogenate.
Analysis of homogenates, extracts, and buffer measured by ELISA analysis and compared to the original amount of toxins incubated with the shellfish meat showed that acetone extraction produced a total recovery of the toxins whereas ethyl ether extracted only 25% of the amount present (Figure 5).
Samples are shucked, homogenized, and extracted with ether.
We next determined whether we could measure brevetoxin activity in blood extracted from the card using receptor assay.
We extracted blood spots and measured toxin activity at a 1/6 dilution using the microplate receptor assay.
We analyzed blood extracted from positive tested animals for PbTx-3 parent ion and the two daughter fragments.