キチン

化学的特性Chitin is a colorless, crystalline or amorphous powder that is insoluble in water, organic solvents, dilute acids, and alkalis. It dissolves in concentrated mineral acids with simultaneous degradation of the polymer. Although chitosan is insoluble in water, it does dissolve in aqueous organic acids, for example, acetic and formic acids, as well as inorganic acids. Chitin and chitosan preparation can vary due to the source, with compositional differences. Similarly, the physicochemical characteristics of chitin and chitosan differ between crustacean species and preparation methods. Several studies have clearly demonstrated the specific characteristics of these products. The Mw and degree of deacetylation (DD) vary with process conditions. The physicochemical characteristics of chitin and chitosan influence their functional properties. Mw and DD vary with process conditions or different extraction methods. Chitosan's application depends on physical, biological, and chemical properties and chitosan depends on two parameters, such as DD and Mw.

化学性质N-アセチルグルコサミンがβ-1,4結合で連なったポリマー

解説キチン，白色の無定形物質．平均重合度850．[α]D"－14→＋56°(濃塩酸，加水分解で変化)．水，希アルカリに不溶．濃アルカリと加熱すると脱N-アセチルと分解が起こり，キトサンになる．濃厚無機酸，無水ギ酸などにつけておくと可溶化し，その際，部分分解する．キチナーゼで分解し，N-アセチルグルコサミンを生成する．森北出版「化学辞典（第2版）

用途各種凝集剤

用途酵素・抗体の固定化担体、抗腫瘍活性剤、抗血栓性膜の調製。

説明Chitin is the most abundant natural amino polysaccharide. It has a similar annual yield as cellulose. Chitin is a kind of highly valuable material in biomedical applications because of its high biocompatibility, biodegradability and non-toxicity as well as its antimicrobial activity and low immunogenicity. It can be easily processed into gels, membrane, nanofibers, beads, nanoparticle, scaffold and sponges, enables its wide applications. In the tissue engineering, it can be used for manufacturing polymer scaffold to satisfy the demands of repairing, replacing, maintaining, or enhancing the function of a particular tissue or organ. In wound dressing, chitin can be used as antimicrobial reagent. In the field of drug delivery, the water-soluble carboxymethyl chitin (CMC) nanoparticle can be used as an effective carrier in drug delivery.

使用chitin (chitine) is a moisture retainer and film-forming agent. This is a naturally occurring polysaccharide found in the shells of crustaceans, such as shrimp and crab, as well as in some fungi and algae. It is also a naturally occuring fibre found in the shells of shellfish. Used for the analysis of chitinase. lysozyme substrate.

定義本品は、海産の無脊椎動物の外骨格から得た多糖類である。主としてN-アセチルーD-グルコサミン基を含む。

定義ChEBI: Chitin is a polysaccharide comprisingchains of N-acetyl-d-glucosamine,a derivative of glucose. Chitin isstructurally very similar to celluloseand serves to strengthen the supportingstructures of various invertebrates. It is the second most abundant biopolymer on earth, found especially in insects and fungi.