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Polysaccharides from bamboo shoots processing by-products: New insight into extraction and characterization
Guangjing Chen1, Kewei Chen1, Renfeng Zhang1
1College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture, Chongqing 400715, PR China.
Food Chemistry
|December 31, 2017
Summary
Accelerated solvent extraction (ASE) efficiently extracts more Chimonobambusa quadrangularis polysaccharides (CPS) than hot water extraction (HWE). ASE-CPS shows superior chemical antioxidant activity, while HWE-CPS has better metal chelating properties.
Area of Science:
- Plant biochemistry
- Extraction technologies
- Food science
Background:
- Chimonobambusa quadrangularis processing by-products are a potential source of valuable polysaccharides.
- Traditional hot water extraction (HWE) methods for polysaccharides can be time-consuming and less efficient.
- Accelerated solvent extraction (ASE) offers a potentially faster and more effective alternative for polysaccharide extraction.
Purpose of the Study:
- To investigate the efficiency of accelerated solvent extraction (ASE) for extracting polysaccharides from Chimonobambusa quadrangularis processing by-products (CPS).
- To compare the yield, physicochemical characteristics, and antioxidant activities of CPS obtained via ASE and hot water extraction (HWE).
- To optimize ASE conditions for maximal CPS yield using response surface methodology.
Main Methods:
- Optimized accelerated solvent extraction (ASE) parameters (126°C, 2 cycles, 22 min) using response surface methodology.
- Extraction of polysaccharides from Chimonobambusa quadrangularis processing by-products using both ASE and hot water extraction (HWE).
- Comparative analysis of polysaccharide yield, chemical composition, molecular weight distribution, rheological properties, and antioxidant activities (ORAC, reducing power, DPPH, hydroxyl radical scavenging, metal chelating).
Main Results:
- Optimized ASE conditions yielded a significantly higher polysaccharide yield (9.96% ± 0.39%) compared to HWE (7.16% ± 0.32%).
- ASE and HWE produced polysaccharides with distinct chemical compositions, molecular weight distributions, and rheological properties, though primary structures were similar.
- ASE-extracted CPS demonstrated superior antioxidant activities (ORAC, reducing power, DPPH, hydroxyl radical scavenging), while HWE-extracted CPS showed higher metal chelating activity.
Conclusions:
- ASE is a highly efficient technology for rapid extraction of polysaccharides from Chimonobambusa quadrangularis processing by-products.
- ASE offers advantages over HWE in terms of yield and specific antioxidant functionalities of the extracted polysaccharides.
- The study highlights the potential of utilizing ASE for valorizing plant by-products and obtaining functional ingredients.
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