鼠李糖
多糖
黄原胶
葡萄糖醛酸
半乳糖
化学
甘露糖
单体
食品科学
特性粘度
拉伤
阿拉伯糖
生物化学
立体化学
流变学
发酵
木糖
聚合物
有机化学
生物
材料科学
复合材料
解剖
作者
J. Wünsche,Holger Brüggemann,Moritz Gansbiller,Jochen Schmid
标识
DOI:10.1016/j.ijbiomac.2023.127097
摘要
The family of Acetobacteraceae has demonstrated their ability to produce several heteropolysaccharides with a strong structural resemblance to xanthan gum. In this study, we assessed the potential of three isolates of K. baliensis as exopolysaccharide producers, namely K. baliensis SR-745, K. baliensis LMG 27018, and K. baliensis SR-1290. Among these, K. baliensis SR-745 was identified as the most promising candidate, exhibiting a final exopolysaccharide titer of 7.09 (± 0.50) g·L-1 and a productivity of 0.15 (± 0.01) g·L-1·h-1. Subsequent monomer analysis confirmed structural variations for the side chain composition of different strains. A molar subunit ratio of 6:1:1:1 (d-glucose: D-mannose: D-galactose: D-glucuronic acid) for EPS derived from K. baliensis SR-745 and of 3:1:3:1 for K. baliensis LMG 27018 was determined, while the exopolysaccharide produced by K. baliensis SR-1290 consisted of a major share of rhamnose. In-depth rheological polymer characterizations revealed high viscosity rates and predominantly elastic gel character, making polysaccharides of K. baliensis highly interesting for applications in the food and cosmetic industry. Further insights into the fundamental structure-function relationships of biopolymers were obtained by comparing exopolysaccharides derived from K. baliensis to a genetically engineered xanthan variant lacking acetyl and pyruvyl substitutions.
科研通智能强力驱动
Strongly Powered by AbleSci AI