Document Detail

Chitosan as an edible invisible film for quality preservation of herring and atlantic cod.
MedLine Citation:
PMID:  12188625     Owner:  NLM     Status:  MEDLINE    
The effect of chitosan with different molecular weights as coatings for shelf-life extension of fresh fillets of Atlantic cod (Gadus morhua) and herring (Clupea harengus) was evaluated over a 12-day storage at refrigerated temperature (4 +/- 1 degrees C). Three chitosan preparations from snow crab (Chinoecetes opilio) processing wastes, differing in viscosities and molecular weights, were prepared; their apparent viscosities (360, 57, and 14 cP) depended on the deacetylation time (4, 10, and 20 h, respectively) of the chitin precursor. Upon coating with chitosans, a significant (p < or = 0.05) reduction in relative moisture losses of 37, 29, 29, 40, and 32% was observed for cod samples coated with 360 cP chitosan after 4, 6, 8, 10, and 12 days of storage, respectively. Chitosan coating significantly (p < or = 0.05) reduced lipid oxidation as displayed in peroxide value, conjugated dienes, 2-thiobarbituric acid reactive substances and headspace volatiles, chemical spoilage as reflected in total volatile basic nitrogen, trimethylamine, and hypoxanthine, and growth of microorganisms as reflected in total plate count in both fish model systems compared to uncoated samples. The preservative efficacy and the viscosity of chitosan were inter-related; the efficacy of chitosans with viscosities of 57 and 360 cP was superior to that of chitosan with a 14 cP viscosity. Thus, chitosan as edible coating would enhance the quality of seafoods during storage.
You-Jin Jeon; Janak Y V A Kamil; Fereidoon Shahidi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-08-21     Completed Date:  2002-10-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5167-78     Citation Subset:  IM    
Department of Biochemistry, Memorial University of Newfoundland, St. John's, Canada A1B 3X9.
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MeSH Terms
Chitin* / analogs & derivatives,  chemistry
Crustacea / chemistry
Food Microbiology
Food Packaging*
Food Preservation*
Hypoxanthine / metabolism
Lipid Peroxidation
Methylamines / metabolism
Molecular Weight
Nitrogen / metabolism
Reg. No./Substance:
0/Biopolymers; 0/Methylamines; 1398-61-4/Chitin; 68-94-0/Hypoxanthine; 75-50-3/trimethylamine; 7727-37-9/Nitrogen; 9012-76-4/Chitosan

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