title: Properties of gelatin film from horse mackerel (Trachurus japonicus) scale.
abstract: Optimal conditions for extracting gelatin and preparing gelatin film from horse mackerel scale, such as extraction temperature and time, as well as the protein concentration of film-forming solutions were investigated. Yields of extracted gelatin at 70 °C, 80 °C, and 90 °C for 15 min to 3 h were 1.08% to 3.45%, depending on the extraction conditions. Among the various extraction times and temperatures, the film from gelatin extracted at 70 °C for 1 h showed the highest tensile strength and elongation at break. Horse mackerel scale gelatin film showed the greatly low water vapor permeability (WVP) compared with mammalian or fish gelatin films, maybe due to its containing a slightly higher level of hydrophobic amino acids (total 653 residues per 1000 residues) than that of mammalian, cold-water fish and warm-water fish gelatins. Gelatin films from different preparation conditions showed excellent UV barrier properties at wavelength of 200 nm, although the films were transparent at visible wavelength. As a consequence, it can be suggested that gelatin film from horse mackerel scale extracted at 70 °C for 1 h can be applied to food packaging material due to its lowest WVP value and excellent UV barrier properties.
authors.affiliation: Dept. of Food Science and Technology, Tokyo Univ. of Marine Science and Technology, Japan.
authors.forename: Thuy
authors.initials: T
authors.lastname: Le
authors.forename: Hiroki
authors.initials: H
authors.lastname: Maki
authors.forename: Kigen
authors.initials: K
authors.lastname: Takahashi
authors.forename: Emiko
authors.initials: E
authors.lastname: Okazaki
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Osako
mesh_terms: D000596:Amino Acids; D000818:Animals; D001688:Biological Products; D003080:Cold Temperature; D004817:Epidermis / Q000737:chemistry*; D018857:Food Packaging; D005780:Gelatin / Q000737:chemistry*; D006801:Humans; D010473:Perciformes; D010539:Permeability; D013227:Steam; D013696:Temperature; D013718:Tensile Strength; D014466:Ultraviolet Rays; D014867:Water
chemical_list: D000596:Amino Acids; D001688:Biological Products; D013227:Steam; C015233:gelatin film; D014867:Water; D005780:Gelatin
keywords: extraction temperature; extraction time; gelatin film; horse mackerel scale; mechanical properties