Influences of different drying methods on the structural characteristics and prebiotic activity of polysaccharides from bamboo shoot (Chimonobambusa quadrangularis) residues

In the present study, in order to assess the influences of drying methods on the chemical structures, in vitro digestibility and prebiotic potential of polysaccharides extracted from Chimonobambusa quadrangularis shoot (CPSs), four drying methods, including hot air-, vacuum-, freeze-, and spray-dryi...

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Bibliographic Details
Published in:International journal of biological macromolecules 2020-07, Vol.155, p.674-684
Main Authors: Chen, Guang-jing, Hong, Qing-yue, Ji, Ning, Wu, Wen-neng, Ma, Li-zhi
Format: Article
Language:English
Subjects:
alpha-Amylases - metabolism
Bamboo shoots
Desiccation - methods
Digestibility
Freeze Drying - methods
Freeze-drying method
Gastric Juice - metabolism
Humans
Poaceae - chemistry
Polysaccharides
Polysaccharides - chemistry
Polysaccharides - metabolism
Prebiotic activity
Prebiotics - analysis
Short chain fatty acid
Vacuum
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Summary:In the present study, in order to assess the influences of drying methods on the chemical structures, in vitro digestibility and prebiotic potential of polysaccharides extracted from Chimonobambusa quadrangularis shoot (CPSs), four drying methods, including hot air-, vacuum-, freeze-, and spray-drying, were utilized to dry CPSs. Results revealed that the physicochemical characteristics and prebiotic activity of CPSs varied by different drying methods. In comparison with the other drying methods, freeze-dried CPSs had higher uronic acid content (9.58%), lower medium-high molecular weight (117.63 kDa), smaller particle size (115.97 nm) and better solubility. All four CPSs fractions exhibited low degree of digestibility to pretended human gastric juice (< 2%) and α-amylase (< 5%). The freeze-dried CPSs showed the greatest prebiotic activity as this polysaccharide induced the strongest proliferation effect of probiotic bacteria and the highest production of total short chain fatty acids. Our results collectively provided substantial evidence that the freeze-drying method proposed in this study could be an effective technique in improving the prebiotic potentiality of CPSs. •Four drying methods were used to prepare C. quadrangularis polysaccharides (CPSs).•All four CPSs samples were high resistant to α-amylase and gastric juice hydrolysis.•Drying methods exerted a significant impact on prebiotic potential of CPSs.•FD-CPS showed the greatest proliferation effect and stimulated the most SCFAs output.•The relationship between characteristics and prebiotic activity of CPSs was studied.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2020.03.223