Use of FT-IR, FT-Raman and thermal analysis to evaluate the gel formation of curdlan produced by Agrobacterium sp IFO 13140 and determination of its rheological properties with food applicability

卷:232

Mangolim, Camila Sampaio ; da Silva, Thamara Thaiane ; Fenelon, Vanderson Carvalho ; do Nascimento, Adriane ; Sato, Francielle ; Matioli, Graciette

State Univ Maringa UEM

关键词: Microbial polysaccharide;    Gelling agent;    beta-Glucan;    Texture improver;    Thickener;   

DOI  :  10.1016/j.foodchem.2017.04.031

学科分类：食品科学和技术

【 摘 要 】

Curdlan is a linear polysaccharide composed of glucose units joined by beta-(1,3) bonds that possesses unique gelation properties. This study aimed to characterize the structure and evaluate the gelling properties of curdlan produced by Agrobacterium sp. IFO 13140 and its gels, as well as apply it in food. FT-Raman analysis highlighted the structural changes that occurred during the formation of gels, with variations related to the hydrogen bonds and hydrophobic interactions, which occur with the formation of the low-set and high-set gels, respectively. Rheological analysis showed that the pre-gelled commercial curdlan and the curdlan produced by Agrobacterium sp. IFO 13140 differed in terms of gelation properties, which depends of the degree of polymerization of the polysaccharide, but when applied to pasta products, both improved the texture parameters. The curdlan gels were found to have great potential as gelling agents to improve texture, water retention capacity and stability of food products. (C) 2017 Elsevier Ltd. All rights reserved.