chitin


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Related to chitin: Chitosan

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 the exoskeletons of Macro-brachium rosenbergii freshwater prawn farmed in the western region of the state of Parana, Brazil.
Chitin whiskers (CHW) can be prepared from chitins isolated from chitin-containing living organisms by a method similar to the preparation of cellulose whisker through hydrolysis in a strong acid aqueous medium.
Moreover, a new patented methodology (Figure 3) has made it possible to industrially isolate the crystalline structure of chitin (Figure 4) from its allomorph parallel sheets to obtain the so-called chitin nanofibrils (CN).
Chitin measurement: The highest chitin content was for culture containing 120 g/ kg DM sodium hydroxide treated rice straw (P <0.
It may be derived from the chitin in crab and shrimp waste from the fishing industries on Mississippi's Gulf Coast, but there's nothing fishy about chitosan, the base of a remarkable substance developed by Marek Urban, PhD, of the University of Southern Mississippi's Polymer Science Program, and his research group.
Exoskeletons] contain the protein chitin, which is not highly digestible," says Turpin.
The squeamish might like to look away now, but animal products including gelatine from the bones and connective tissues of cows or pigs, isinglass from fish bladders and chitin from crab or lobster shells are widely used in 'fining' wine.
Since these values are hard to determine experimentally, we used the results from a number of different approaches: 1) a basic infiltration test (using acetone) for detecting the presence of empty (air-filled) layers (see Parker 2000); 2) previous studies, which have reported spider reflectors from the abdominal and cephalothoracic regions as being comprised of air and chitin layers (Parker & Hegedus 2003; Land et al.
Seafood-averse crafters and curious cats need not worry: The product is so thoroughly processed, there's not even a whiff of fishy feel or scent, and chitin makes up only a small percentage of the yarn.
And when he and his devoted wife found two new species of pogonophora (long worms) wiggling with enviable contentment in upright tubes of protein and chitin, the news was greeted with approving nods.
The lectin acts as a key to the carbohydrate structure, known as chitin.
Scientists say chitin - also found in fungi and moulds - could cause attacks.