chitin


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chitin

 [ki´tin]
a horny polysaccharide, the principal constituent of shells of arthropods and shards of beetles, and found in certain fungi.

chi·tin

(kī'tin),
A linear polymer of N-acetyl-d-glucosamine, linked β(1→4), similar in structure to cellulose; the second most abundant polysaccharide in nature, comprising the horny substance in the exoskeleton of beetles, crabs, and certain microorganisms, as well as in some plants and fungi.

chitin

/chi·tin/ (ki´tin) an insoluble, linear polysaccharide forming the principal constituent of arthropod exoskeletons and found in some plants, particularly fungi.

chitin

(kīt′n)
n.
A nitrogen-containing polysaccharide that is a tough, protective, semitransparent substance and is the principal component of arthropod exoskeletons and the cell walls of certain fungi.

chi′tin·ous adj.

chi·tin

(kī'tin)
A polymer of N-acetyl-d-glucosamine similar in structure to cellulose and the second most abundant polysaccharide in nature, comprising the horny substance in the exoskeleton of beetles, crabs, certain microorganisms, and other life forms.

chitin

A carbohydrate polymer (polysaccharide) found in worms, insects, crustaceans and fungi but not in mammals. Mammalian chitinases, however, exist and one has been implicated in allergic ASTHMA. Neutralization of this enzyme reduces airway inflammation and hyper-responsiveness.

chitin

a linear POLYSACCHARIDE containing β(1---->4)-linked N -acetylglucosamine units, that has considerable strength because of its long fibrous molecules. It is resistant to chemicals and is found in the cuticle of insects and some other arthropods where the outer parts are impregnated with tanned proteins which gives it added strength. It is also found in the cell walls of most FUNGI, in certain DIATOMS and certain protozoa.

chitin

a horny polysaccharide of N-acetylglucosamine, the principal constituent of shells of arthropods and shards of beetles, and found in certain fungi.

chitin synthase inhibitors
used as antifungals and for control of flea infestation. See also lufenuron.
References in periodicals archive ?
Chitin was extracted from crustaceans by the method of [15], Crab shell chitin flakes (Win-lab, UK).
The resulting residue is the purified chitin, which was oven dried at 100 0C.
This means that a substantial portion of the food intake consists of chitin and cellulose, which require specific enzymes to break the linkages of the polymer so that absorbable units can be obtained.
In Brazil, although the production of freshwater prawns has been variable, factors such as increasing demand, improved prices and production chain organization (Marques & Moraes-Valenti, 2012) have ensured the creation and consequently the availability of residues (shells) rich in chitin, and other components.
MacLachlan and his students have been using the shells to make composites from chitin that swell when immersed in liquids to create a variety of colours.
CSIs interfere with the biosynthesis of chitin in insects and thus prevent moulting and formation of new cuticle (Ishaaya and Casida, 1974; Hammock and Quistad, 1981; Mondal and Parween, 2000).
2 ml colloidal chitin was prepared and incubated for 20h at 40[degrees]C and then centrifuged at 13000 rpm for 5 min at 6 c.
phaseolina (M), glucose, S-glucan, casein, laminarin or colloidal chitin as a carbon source.
Such processed mushroom chitin samples were washed with distilled water until attaining neutral pH followed by drying.
5% chitin could not be measured because of its fragility.
According to Polymer Solutions, chitin is used by fungi, insects and several types of sea creatures--mollusks, squids, octopuses, shrimp, lobsters, and crabs in cell walls, shells, beaks and exoskeletons.