title: Film forming ability of gelatins from splendid squid (Loligo formosana) skin bleached with hydrogen peroxide.
abstract: Properties of gelatin films from splendid squid (Loligo formosana) skin bleached with hydrogen peroxide (H(2)O(2)) at various concentrations (0-8% w/v) were investigated. Tensile strength (TS) and water vapour permeability (WVP) of films decreased, but elongation at break (EAB) increased (p<0.05) as the concentration of H(2)O(2) increased. Among all films, that prepared from gelatin with 2% H(2)O(2) bleaching showed the lowest ΔE(∗)-value (total colour difference), which was concomitant with the highest L(∗)-value (lightness). Generally, higher concentration of H(2)O(2) resulted in increased b(∗)-value (yellowness) of resulting films. Electrophoretic study revealed that α-chains of gelatin in films became lowered with increasing H(2)O(2) concentrations used for bleaching. Thermogravimetric analysis indicated that heat susceptibility and weight loss of different films varied with H(2)O(2) concentrations. Rougher surface was obtained in gelatin films prepared from skin bleached with H(2)O(2) concentrations above 4%. Thus, the concentrations of H(2)O(2) used for bleaching of squid skin prior to gelatin extraction directly affected the properties of corresponding gelatin films.
authors: Department of Food Technology, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
authors: Muralidharan
authors: M
authors: Nagarajan
authors: Soottawat
authors: S
authors: Benjakul
authors: Thummanoon
authors: T
authors: Prodpran
authors: Ponusa
authors: P
authors: Songtipya
authors: Pornpot
authors: P
authors: Nuthong
mesh_terms: D000818:Animals; D057886:Bleaching Agents / Q000494:pharmacology*; D049832:Decapodiformes / Q000737:chemistry; D005780:Gelatin / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D010539:Permeability; D010858:Pigmentation / Q000187:drug effects; D012867:Skin / Q000737:chemistry* / Q000187:drug effects; D013718:Tensile Strength
chemical_list: D057886:Bleaching Agents; C015233:gelatin film; D005780:Gelatin; D006861:Hydrogen Peroxide