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KMID : 0525720110160040249
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Journal of Chitin and Chitosan
2011 Volume.16 No. 4 p.249 ~ p.253
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Comparison of Physicochemical and Functional Properties of Chitosans Prepared from Crab Leg and Abdomen Shells
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No Hong-Kyoon
Youn Dal-Kyoung
Byun Sung-Mi
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Abstract
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Selected physicochemical and functional properties of chitosans prepared from crab leg and abdomen shells were evaluated. The leg shell contained comparable protein (29.50% vs. 27.47%) and ash (47.70% vs. 48.40%) but lower fat (0.53% vs. 0.73% ) and chitin (21.09% vs. 22.73%) contents compared with the abdomen shell. Physicochemical characteristics of chitosans somewhat differed depending on the parts of crab shell. Chitosan from leg shell (leg chitosan) showed lower degree of deacetylation (89.13% vs. 91.48%) but higher viscosity (1424.67 mPa s vs. 559.90 mPa s) and bulk density (0.34 g/mL vs. 0.31 g/mL) than chitosan from abdomen shell (abdomen chitosan). Leg chitosan had comparable L* but higher a* and b* values than abdomen chitosan. Higher water-, fat-, and dye-binding capacities and DPPH radical scavenging activity were observed with abdomen chitosan, having higher degree of deacetylation and lower viscosity and bulk density
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KEYWORD
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abdomen shell, chitosan, crab, functional properties, Leg shell
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