title: Textural improvement of salt-reduced Alaska pollack (Theragra chalcogramma) roe product by CaCl2.
abstract: Salt-reduced Alaska pollack roe benefits public health by decreasing NaCl intake; however, it has a poor texture with low breaking strength. This study addresses the feasibility of NaCl reduction in salted roe products, with focusing on the improvement of breaking strength using CaCl2. Salted roe products were prepared by immersing Alaska pollack roe in either NaCl solutions (3.5, 7.0, 15.0, 20.0, and 25.0%) or 7.0% NaCl solutions with added CaCl2 (0.0, 0.5, 1.0, 2.0, and 3.0%). Breaking strength, moisture and salt contents, eggshell protein composition of the salted roe products, as well as total endogenous transglutaminase (TGase) activity in various NaCl and CaCl2 concentrations were analyzed. CaCl2 addition enhanced eggshell protein crosslinking and breaking strength of the salt-reduced roe products. An acyl transfer reaction catalyzed by calcium-dependent TGase may be responsible for the eggshell protein crosslinking and improved texture. Thus, we successfully developed a salt-reduced Alaska roe product using CaCl2.
authors.affiliation: Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan.
authors.forename: Chaoping
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan.
authors.forename: Emiko
authors.initials: E
authors.lastname: Okazaki
authors.affiliation: Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan. Electronic address: osako@kaiyodai.ac.jp.
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Osako
mesh_terms: D000413:Alaska; D000818:Animals; D002122:Calcium Chloride; D005519:Food Preservation / Q000379:methods*; D048388:Gadiformes; D012965:Sodium Chloride
chemical_list: D012965:Sodium Chloride; D002122:Calcium Chloride
keywords: Alaska pollack roe; Calcium chloride; Mineral composition; Salt-reduced food; Transglutaminase