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agar \a"gar\, n. [See agar-agar.]

  1. common shortened form of agar-agar[2].

    Syn: gelose, agar-agar.

  2. 1 any culture medium that uses agar as the gelling agent; -- used especially with a modifying prefix, as, EMB agar. The term is applied both to the dehydrated medium powder containing agar and to the gelatinous medium prepared from it.

    Syn: nutrient agar [WordNet 1.5 +PJC] ||


Agar-agar \A`gar-a"gar\, n. [Ceylonese local name.]

  1. A fucus or seaweed much used in the East for soups and jellies; Ceylon moss ( Gracilaria lichenoides).

  2. A gelatinlike substance, or a solution of it, prepared from certain seaweeds containing gelose (such as Ceylon moss, Gracilaria lichenoides or other seaweeds of the genera Gelidium, Ceramium, Pterocladia, and Eucheuma), and used for solidifying growth media in the artificial cultivation of bacteria, or as a gelling agent in foods; -- usually called simply agar, by abbreviation.

    Note: In composition it is predominantly a polysaccharide, and is not degraded by most bacteria. It thus almost completely replaced the earlier protein-based gelatins used for fixing bacterial colonies on culture plates, as the gelatins were often dissolved by the proteolytic enzymes common in bacteria.

    Syn: gelose, agar.


n. 1 A gelatinous material obtained from the marine algae, used as a bacterial culture medium, in electrophoresis and as a food additive. 2 (context chemistry English) An agarose, the principle constituent of the commercial gel.

  1. n. any culture medium that uses agar as the gelling agent [syn: nutrient agar]

  2. a colloidal extract of algae; used especially in culture media and as a gelling agent in foods [syn: agar-agar]

Agar, SD -- U.S. town in South Dakota
Population (2000): 82
Housing Units (2000): 54
Land area (2000): 0.168095 sq. miles (0.435364 sq. km)
Water area (2000): 0.000000 sq. miles (0.000000 sq. km)
Total area (2000): 0.168095 sq. miles (0.435364 sq. km)
FIPS code: 00460
Located within: South Dakota (SD), FIPS 46
Location: 44.838678 N, 100.072869 W
ZIP Codes (1990): 57520
Note: some ZIP codes may be omitted esp. for suburbs.
Agar, SD

Agar (pronounced , , "") or agar-agar (, , "") is a jelly-like substance, obtained from algae. It was discovered in the late 1650s or early 1660s by Mino Tarōzaemon in Japan, where it is called kanten.

Agar is derived from the polysaccharide agarose, which forms the supporting structure in the cell walls of certain species of algae, and which is released on boiling. These algae are known as agarophytes and belong to the Rhodophyta (red algae) phylum. Agar is actually the resulting mixture of two components: the linear polysaccharide agarose, and a heterogeneous mixture of smaller molecules called agaropectin.

Throughout history into modern times, agar has been chiefly used as an ingredient in desserts throughout Asia and also as a solid substrate to contain culture media for microbiological work. Agar can be used as a laxative, an appetite suppressant, a vegetarian substitute for gelatin, a thickener for soups, in fruit preserves, ice cream, and other desserts, as a clarifying agent in brewing, and for sizing paper and fabrics.

The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of some species of red algae, primarily from the genera Gelidium and Gracilaria. For commercial purposes, it is derived primarily from Gelidium amansii. In chemical terms, agar is a polymer made up of subunits of the sugar galactose.

Agar (disambiguation)

Agar is a gelatinous substance with culinary and microbiological uses.

Agar may also refer to:

Agar (name)

Agar is both a surname and a given name.

Usage examples of "agar".

Cut to Agar, inventor of the atomic napalm, holding Mara Corday on a hill above the burning city and the charring monster.

Chemicals, but it did not consume much space: the salt, the agar, a small box of lye, six ounces of absolute alcohol and four of formalin.

Meanwhile, he busied himself adjusting his microscope and test-tubes and getting the agar slides ready for examination.

Its editors Herbert Agar, Ralph Borsodi, Canon Ligutti and others, all foremost in the Ruralist movement, acknowledge debt to Chesterton and are carrying on the torch.

Even with both channels, Mora Dyen and Cloris Agar, monitoring, he thrashed through four aborts before they could get the transfer into him.

Highlights included checking agar emulsions used to bind skin cells for zero-G cloning, a test drill of a new depressurization protocol and a modification of the strap-on peeing device which was slightly embarrassing.

Plop them on a bed of agar and pamper them as you will, and most will just lie there, declining every inducement to bloom.

On the first occasion I had been down to visit an isolated village, on the south face of Kala Agar ridge, that had been abandoned the previous year owing to the depredations of the man-eater, and on the way back had taken a cattle track that went over the ridge and down the far side to the forest road, when, approaching a pile of rocks, I suddenly felt there was danger ahead.

As soon as Digen walked in the door, Cloris Agar stepped out of one of the cubicles partitioned off by heavy insulating drapes.

The blood clock was a rotating dish that held a circular slab of blood agar.

The virulent strain was removed from the pigeons and subcultured onto blood agar plates.

Along with the usual laboratory standbys-- horse and sheep blood agar, chocolate agar, simplex, Sabourad's medium-- there were thirty diagnostic media, containing various sugars and minerals.

Along with the usual laboratory standbys-- horse and sheep blood agar, chocolate agar, simplex, Sabourad’.

Using a sanple of blood taken from the body of Gary Wechlas, she was methodically contaminating a series of growth media, jellied compounds filled with nutrients on which bacteria generally thrived: horse blood agar, sheep blood agar, simplex, chocolate agar, and many others.

It had all cost a pretty penny, Agar was certain of that, and it meant the pogue was well worth having.