agar


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Agar

(ā`gər), the same as HagarHagar
or Agar
, according to the Book of Genesis, servant of Abraham's wife Sarah and mother of his eldest son, Ishmael. She and her son were sent out into the wilderness because of Sarah's jealousy. An angel aided her there.
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agar

(ä`gär, ā`–, ăg`är), product obtained from several species of red algae, or seaweedseaweed,
name commonly used for the multicellular marine algae. Simpler forms, consisting of one cell (e.g., the diatom) or of a few cells, are not generally called seaweeds; these tiny plants help to make up plankton.
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, chiefly from the Ceylon, or Jaffna, moss (Gracilaria lichenoides) and species of Gelidium, harvested in eastern Asia and California. Chemically, agar is a polymer made up of subunits of the sugar galactose; it is a component of the algae's cell walls. Dissolved in boiling water and cooled, agar becomes gelatinous; its chief uses are as a culture medium (particularly for bacteria) and as a laxative, but it serves also as a thickening for soups and sauces, in jellies and ice cream, in cosmetics, for clarifying beverages, and for sizing fabrics. See also RhodophytaRhodophyta
, phylum (division) of the kingdom Protista consisting of the photosynthetic organisms commonly known as red algae. Most of the world's seaweeds belong to this group.
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Agar

A major constituent of the cell walls of certain red algae, especially members of the families Gelidiaceae and Gracilariaceae. Extracted for its gelling properties, it is one of three algal polysaccharides of major economic importance, the others being alginate and carrageenan. Agar is composed of two similar fractions, agarose and agaropectin, in which the basic unit is galactose, linked alternately α-1,3-( d -galactose) and β-1,4-(α- l -galactose).

Agar is prepared by boiling the algae in water, after which the filtered solution is cooled, purified, and dried. It is an amorphous, translucent material that is packaged in granules, flakes, bricks, or sheets. One of its chief uses is as a gelling agent in media for culturing microorganisms. It is also used in making confections, as an emulsifier in cosmetics and food products, as a sizing agent, as an inert carrier of drugs in medicine, and as a laxative. See Culture

agar

[′äg·ər]
(materials)
A gelatinous product extracted from certain red algae and used chiefly as a gelling agent in culture media.

agar

a complex gelatinous carbohydrate obtained from seaweeds, esp those of the genus Gelidium, used as a culture medium for bacteria, a laxative, in food such as ice cream as a thickening agent (E406), etc.
References in periodicals archive ?
The contribution of the key players has kept the Agar Agar Gummarket merged with significant developments that keep going to balance market growth.
As a result of the rift between Agar and al-Hilu, the Blue Nile state witnessed in June and August 2017 tribal clashes between the Angsana of Malik Agar and the Uduk, an ethnic group supporting self-determination led by Tika.
Ltd., Industrias Roko, S.A, Neogen, Merck Group, Agarindo Bogatama, Setexam and Norevo Gmbh are the major companies identified across the value chain in the global agar market.
Conclusion: HiCrome UTI agar was found to be more useful as primary urine culture medium in both higher rate of isolation and presumptive identification of uropathogens in comparison to conventional media.
Agar, who was coach of France at the 2013 World Cup, said: "I spoke with the board of directors a number of weeks ago outlining the reasons why I had decided to look for another job within the game at the end of the season and therefore requested a release from the remaining two years of my contract.
Agar solution (2-4% w/v) was prepared by heating agar powder dispersion in phosphate buffer (pH 6.8) at 90[degrees]C and the solution was cooled to 45[degrees]C.
The four chromogenic media were compared with blood agar and evaluated in terms of sensitivity, specificity, ease of use, and cost.
Newcastle Crown Court heard the victim remains friends with Agar and did not want her to be prosecuted.
Australia looked set to concede a potentially crucial first-innings deficit when debutant Agar walked to the crease with his side in big trouble on 117 for nine in pursuit of England's 215.
Agar was 69 and Hughes 63 at the interval after coming together at Trent Bridge with Australia crumbling at 117-9 following James Anderson's five-wicket haul.
Agar made some shrewd signings, but with 20 new faces at the club it looked to be too difficult for them to be in contention for a play-off berth.