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Comparison of different extraction methods for polysaccharides from Dendrobium officinale stem
Lian He1, Xiaoteng Yan2, Jian Liang3
1Guangdong Food and Drug Vocational College, Guangzhou, Guangdong, 510520, PR China.
Carbohydrate Polymers
|August 11, 2018
Summary
Freeze-thawing cold-pressing (FTCP) is the optimal method for extracting Dendrobium officinale polysaccharides (DOP). This method yields high extraction rates, preserves molecular structure, and maximizes antioxidant activity, making it superior to other techniques like hot water extraction.
Area of Science:
- Phytochemistry
- Natural Product Chemistry
- Biotechnology
Background:
- Dendrobium officinale polysaccharides (DOP) are bioactive compounds with significant health benefits.
- Optimizing extraction methods is crucial for maximizing DOP yield and preserving its functional properties.
- Various extraction techniques exist, each with potential advantages and disadvantages for polysaccharide isolation.
Purpose of the Study:
- To screen and identify the optimum extraction method for Dendrobium officinale polysaccharides (DOP).
- To compare the extraction yield, structural integrity, and antioxidant activity of DOP obtained via different methods.
- To determine the most suitable method for efficient and effective DOP extraction.
Main Methods:
- Evaluated six extraction methods: hot water extraction (HWE), cold-pressing (CP), freeze-thawing cold-pressing (FTCP), ultrasonic-assisted hot water extraction (UHWE), microwave-assisted hot water extraction (MHWE), and enzyme-assisted hot water extraction (EHWE).
- Optimized parameters for each extraction method individually.
- Compared extraction yield, molecular weight, and antioxidant activity of DOP under standardized conditions.
Main Results:
- Ultrasonic-assisted hot water extraction (UHWE) and freeze-thawing cold-pressing (FTCP) demonstrated higher extraction yields compared to other methods.
- Polysaccharides extracted via cold-pressing (DOPCP) and FTCP (DOPFTCP) exhibited higher molecular weights.
- DOPFTCP displayed the highest antioxidant activity among all tested samples.
Conclusions:
- Freeze-thawing cold-pressing (FTCP) is the most effective method for extracting Dendrobium officinale polysaccharides (DOP).
- FTCP offers a superior combination of high extraction yield, well-preserved molecular structure, and potent antioxidant activity.
- This method provides a promising approach for the efficient isolation of high-quality DOP for potential applications.
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