Chitin Chitosan Material Science

Material Science of Chitin And Chitosan

Material Science of Chitin And Chitosan
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Chitosan - Chitosan is a linear polysaccharide composed of randomly distributed ß-(1-4)-linked D-glucosamine (deacetylated unit) and N-acetyl-D-glucosamine (acetylated unit). Chitosan is produced commercially by deacetylation of chitin (can be produced from chitin also), which is the structural element in the exoskeleton of crustaceans (crabs, shrimp, etc.

Polymorphism (materials science) - Polymorphism in materials science is the ability of a solid material to exist in more than one form or crystal structure. Polymorphism can potentially be found in any crystalline material including polymers and metals and is related to allotropy which refers to elemental solids.

Parent material - Parent material, in soil science, means the underlying geological material (generally bedrock or a superficial or drift deposit) from which soil horizons form. Soils typically get a great deal of structure and minerals from their parent material.

Fatigue (material) - In materials science, fatigue is the progressive, localized, and permanent structural damage that occurs when a material is subjected to cyclic or fluctuating strains at nominal stresses that have maximum values less than (often much less than) the static yield strength of the material. The resulting stress may be below the ultimate tensile stress, or even the yield stress of the material, yet still cause catastrophic failure.

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