extract

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extract

1. a preparation containing the active principle or concentrated essence of a material
2. Pharmacol a solution of plant or animal tissue containing the active principle
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Extract

 

a concentrated medicinal substance obtained from raw materials that contain certain active ingredients, such as glycosides, alkaloids, and vitamins; a type of galenical. Depending on the extracting agent used, extracts may be categorized as, for example, aqueous, alcoholic, or ethereal. Depending on the degree of thickening after evaporation, they may be classified as liquid, semiliquid (no more than 25 percent moisture), or dry (up to 5 percent moisture).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

extract

[′ek‚strakt (noun) or ik′strakt (verb)]
(chemistry)
Material separated from liquid or solid mixture by a solvent.
(computer science)
To form a new computer word by extracting and putting together selected segments of given words.
To remove from a computer register or memory all items that meet a specified condition.
(metallurgy)
To separate a metal or a mineral from an ore by various chemical or mechanical methods.
(pharmacology)
A pharmaceutical preparation obtained by dissolving the active constituents of a drug with a suitable menstruum, evaporating the solvent, and adjusting to prescribed standards.
A preparation, usually in a concentrated form, obtained by treating plant or animal tissue with a solvent to remove desired odiferous, flavorful, or nutritive components of the tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

extract

To decompress. To restore the original files from a compressed archive (ZIP file, RAR file, etc.). See archive, data compression and archive formats.
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References in periodicals archive ?
The crude extract obtained by EE presented fractions with the higher [iota]-CARs yields compared to those of RHWE and HWE, respectively (Table 2), confirming a previous study that used the papain digestion in the isolation of H.
Preparation of crude extracts. The plant material (leaves) were collected at early morning hours and subjected to sun shade drying (15-20 days).
Experiments: Both the crude extract and its three fractions were assessed for their feeding deterrence on H.
Broccoli extracts (chloroform, combined ethyl acetate and ethanol and the crude extract) showed significant loss in body weight.
While the triterpene sapogenin (Oleszek 2002) content for the semi-purified extract was 72%, this decreased to 26% for the crude extract. This can result from the type of extraction used, since this allows for the presence of different compounds from saponins such as sugars, among others (Guterres 2005).
Four to six animals in two experiments were included for each fraction or crude extract.
The fibrinogenolytic activity was evaluated by incubating 20 [micro]g of human fibrinogen (Sigma Aldrich) with 5 [micro]g of the crude extract for 15, 30, 45, 60 and 120 min.
The treatment with the crude extract resulted in decrease of cell to cell surface attachment of P aeruginosa PAO1 with a hydrophobicity percentage of 29.19 [+ or -] 3.29% (Table 1).
Phytochemical analysis: The Caralluma edulis crude extract was tested, for detection of various chemical constituents according to established protocols (Harborne, 1984; Evans, 1996).
Test for alkaloids: To 0.5 g of crude extract, dilute hydrochloric acid was added and filtered.
Selection of these lipids was based on the preliminary miscibility studies with the crude extract (data not shown).
Saline solution was used for the negative control mice, which had a body weight reduction by 0.7 while for test mice, 0.4 g weight was reduced in methanol crude extract and 0.3 g was reduced in ethanol crude extract.