title: Preparation of oxidized agar and characterization of its properties.
abstract: A series of oxidized agars with different carboxyl content were prepared, and their properties were determined and analyzed. The results showed that the gelling temperature, the optical rotation and the apparent viscosity of the agar solution, and the melting temperature, the strength, the hardness, the fracturability, the springiness, the chewiness and the gumminess of agar gel all decreased except that the cohesiveness increased after oxidation. The gel skeleton structures of agar before and after oxidation were all of the porous network structures, but the pores of gel skeleton structure became smaller and denser after oxidation.
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China. Electronic address: zhangxdqd@hotmail.com.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Xia
authors.affiliation: College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China.
authors.forename: Jimei
authors.initials: J
authors.lastname: Luan
keywords: Cyro-SEM; Oxidized agar; Texture profile analysis; Thermogravimetric analysis