title: Jumbo squid (Dosidicus gigas) mantle collagen: extraction, characterization, and potential application in the preparation of chitosan-collagen biofilms.
abstract: Collagen-based biomaterials have been widely used due to its binding capabilities. However the properties and potential use of new collagen sources are still under investigation. Fish by-products are an excellent source of collagen. Thus, acid-soluble collagen (ASC) was extracted, and biochemical and physicochemically characterized from one under-utilized specie, jumbo squid (Dosidicus gigas). In addition, commercial chitosan (95-50%)-ASC (5-50%) blend films were successfully prepared by casting, and characterized by infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). The molecular masses of the ASC subunits were about 190kDa, 110kDa, and 97kDa, the content of proline and hydroxyproline was 10.9% and 2.8%, respectively. The FT-IR and nuclear magnetic resonance spectra ((1)H NMR) confirmed collagen peptidic crosslinks, and one endothermic peak was found at 119 degrees C. The FT-IR spectrum showed that chitosan and ASC remain linked into the films mainly due to hydrogen bonding. The 85:15 (chitosan:ASC) ratio was selected for its thermal and mechanical analyses. The thermograms of this film indicated the presence of two peaks, one at 87-98 degrees C and the other at 142-182 degrees C. The chitosan:ASC blend produced a transparent and brittle film, with high percentage of elongation at break, and low tensile strength in comparison to chitosan films. D. gigas mantle might be useful as a new source of plasticizer agent in the preparation of biofilms in composites with chitosan.
authors.affiliation: Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd. Luis Encinas y Rosales s/n, 83000, Col. Centro. Hermosillo, Sonora, Mexico.
authors.forename: Mario Hiram
authors.initials: MH
authors.lastname: Uriarte-Montoya
authors.forename: Joe Luis
authors.initials: JL
authors.lastname: Arias-Moscoso
authors.forename: Maribel
authors.initials: M
authors.lastname: Plascencia-Jatomea
authors.forename: Hisila
authors.initials: H
authors.lastname: Santacruz-Ortega
authors.forename: Ofelia
authors.initials: O
authors.lastname: Rouzaud-Sández
authors.forename: Jose Luis
authors.initials: JL
authors.lastname: Cardenas-Lopez
authors.forename: Enrique
authors.initials: E
authors.lastname: Marquez-Rios
authors.forename: Josafat Marina
authors.initials: JM
authors.lastname: Ezquerra-Brauer
mesh_terms: D000818:Animals; D018441:Biofilms; D002152:Calorimetry, Differential Scanning; D048271:Chitosan / Q000378:metabolism*; D003094:Collagen / Q000378:metabolism*; D049832:Decapodiformes; D009682:Magnetic Resonance Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D003094:Collagen; D048271:Chitosan