column:Study on the extraction technology and antioxidant activity of polysaccharide from Dendrobium devonianum and Dendrobium officinale

SHI Xue, TANG Ming-hua

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Journal of Yunnan University of Nationalities(Natural Sciences Edition) ›› 2025, Vol. 34 ›› Issue (01) : 20-26. DOI: 10.3969/j.issn.1672-8513.2025.01.003

column:Study on the extraction technology and antioxidant activity of polysaccharide from Dendrobium devonianum and Dendrobium officinale

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Abstract

This research aims to study the effects of extracting time, extraction solution multiples and times in the water extraction method, as well as different extraction methods on different types of Dendrobium polysaccharides. The results showed that Dendrobium officinale grown in untreated artificial greenhouses has the highest polysaccharide concentration, followed by that of imitation wild Dendrobium officinale. Under the same conditions, after deproteinization using Sevag reagent, the concentration of polysaccharides in the three types of Dendrobium decreased significantly. Among them, the loss rate of imitation wild planting Dendrobium officinale is the largest, as high as 17.7%. In addition, the polysaccharides in Dendrobium devonianum and Dendrobium officinale have better scavenging effect on hydroxyl free radicals. The crude polysaccharide and its purified polysaccharide have better effect on free radicals and DPPH free radicals also have a certain scavenging ability. Different Dendrobium species and planting methods lead to differences in the mass concentration and activity of crude polysaccharides and purified polysaccharides among the three dendrobium samples.

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Dendrobium officinale / Dendrobium devonianum / crude polysaccharide / antioxidant activity

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SHI Xue , TANG Ming-hua. column:Study on the extraction technology and antioxidant activity of polysaccharide from Dendrobium devonianum and Dendrobium officinale. Journal of Yunnan University of Nationalities(Natural Sciences Edition). 2025, 34(01): 20-26 https://doi.org/10.3969/j.issn.1672-8513.2025.01.003

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