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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Structural differences between chitin and chitosan extracted from three different marine sources
International Journal of Biological Macromolecules, Volume 65, Year 2014
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Description
Three marine sources of chitin from Tunisia were investigated. Structural differences between α-chitin from shrimp (Penaeus kerathurus) waste, crab (Carcinus mediterraneus) shells, and β-chitin from cuttlefish (Sepia officinalis) bones were studied by the 13C NMR, FTIR, and XRD diffractograms. The 13C NMR analysis showed a splitting of the C3 and C5 carbon signals for α-chitin, while that of β-chitin was merged into a single resonance. The bands contour of deconvoluted and curve-fit FTIR spectra showed a more detailed structure of α-chitin in the region of OH, NH and CO stretching regions. IR and 13C NMR were used to determine the chitin degree of acetylation (DA). XRD analysis indicated that α-chitins were more crystalline polymorph than β-chitin. Shrimp chitin was obtained with a good yield (20% on raw material dry weight) and no residual protein and salts. Chitosans, with a DA lower than 20% and relatively low molecular masses were prepared from the wet chitins in the same experimental conditions. They were perfectly soluble in acidic medium. Nevertheless, chitin and chitosan characteristics were depending upon the chitin source. © 2014 Elsevier B.V.
Authors & Co-Authors
Hajji, Sawssen
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Younes, Islem
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Ghorbel-Bellaaj, Olfa
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Hajji, Rachid
Tunisia, Sfax
Faculté Des Sciences de Sfax
Rinaudo, Marguerite
France, Grenoble
Biomaterials Applications
Nasri, Moncef
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Jellouli, Kemel
Tunisia, Sfax
Ecole Nationale D'ingénieurs de Sfax
Statistics
Citations: 295
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1016/j.ijbiomac.2014.01.045
e-ISSN:
18790003
Research Areas
Environmental
Study Locations
Tunisia