Rheological and physicochemical properties of polysaccharides extracted from stems of Dendrobium officinale

Wang, Bo; Zhang, Weimin; Bai, Xinpeng; Li, Congfa; Xiang, Dong

doi:10.1016/j.foodhyd.2020.105706

Cited by 55 publications

(25 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7, the differences of viscosity of these concentrates were slight, even with the higher increased concentration. The main reason might be that reverse flux of NaCl occurred, and the existence of positive ions reduced the repulsive force between molecules, leading to molecular expansion, which could effectively reduce the viscosity of polysaccharides (Wang, et al ., 2020).…”

Section: Resultsmentioning

confidence: 99%

Forward osmosis concentration of high viscous polysaccharides of Dendrobium officinale: Process optimisation and membrane fouling analysis

Cai

Zhong

Chu

et al. 2021

Int J of Food Sci Tech

View full text Add to dashboard Cite

Polysaccharides of Dendrobium officinale (DOP) need to be dehydrated and concentrated after extraction for further application. They are usually concentrated by thermal evaporation which consumes great energy. However, high viscosity of DOP makes the concentration more difficult even using non-thermal membrane technologies such as nanofiltration (NF) or reverse osmosis (RO). In this study, effects of process conditions, such as membrane orientations, draw solutions and their concentrations, and flowrate on forward osmosis (FO) concentration of viscous DOP were studied. Active layer to feed solution mode, cross flowrate at 240 mL min −1 , and draw solution of 3 M NaCl have been found as the optimal conditions. Foulants on the membrane surface with loose structure could be easily cleaned and removed by hydraulic flushing. DOP concentrated by FO achieved almost 1.3 times at the same time compared with that in NF and RO. DOP could be further concentrated for 1.5 folds at longtime without significant decrease in water flux. In addition, slight reverse solutes in FO process could reduce the viscosity of high viscous DOP, which was good for concentration. Accordingly, FO is a potential technology for concentration of high viscous polysaccharides such as DOP.

show abstract

Section: Resultsmentioning

confidence: 99%

Forward osmosis concentration of high viscous polysaccharides of Dendrobium officinale: Process optimisation and membrane fouling analysis

Cai

Zhong

Chu

et al. 2021

Int J of Food Sci Tech

View full text Add to dashboard Cite

show abstract

“…As the shear rate increased, the entanglement between the chains of polysaccharide molecule was broken, resulting in a much random orientation of the molecular chains and reducing the interaction between the adjacent chains. Afterward, the apparent viscosity of samples was declined and the aqueous solution showed the phenomenon of shear thinning (Wang, Zhang, et al, 2019).…”

Section: Effects Of Extraction Methods On Apparent Viscosity Of Rpsmentioning

confidence: 99%

Antioxidant activity and rheological properties of the polysaccharides isolated from Ribes stenocarpum maxim with different extraction methods

Qiao

Cai

et al. 2021

J. Food Process. Preserv.

View full text Add to dashboard Cite

The purpose of the present study is to illustrate the effects of extraction methods on the antioxidant activity and rheological properties of polysaccharides isolated from Ribes stenocarpum Maxim (RPs). RPs were extracted by ultrasonic-assisted extraction (RPs-1), alkaline extraction (RPs-2), acid extraction (RPs-3), microwaveassisted extraction (RPs-4), and three-phase separation (RPs-5). The results showed that RPs-1, RPs-2, RPs-3, RPs-4, and RPs-5 are acidic heteropolysaccharides with glucose, arabinose, and galacturonic acid as the main chain units and absence of triple-helix structure. Of them, RPs-3 possess the highest uronic acid content, best thermal stability, and strongest DPPH, ABTS, and hydroxyl radical scavenging abilities. Rheological properties showed that the above-mentioned polysaccharides are non-Newtonian fluids and own the similar shear thinning properties. RPs-3 represent the highest apparent viscosity and better stability in the over-acid or overalkali environment. The above results indicated that the acid extraction could serve as the most favorable extraction method for RPs. Novelty impact statement: A novel polysaccharide was isolated from Ribes stenocarpumMaxim by acid extraction, showing a stronger antioxidant activity and excellent rheological properties, which has a good application prospect in food processing.

show abstract

“…It has been reported that sugar chains slowly disentangle as the shear rate increases, leading to a Newtonian plateau at a high shear rate. 28,29 Polysaccharides as biopolymers exhibit both liquid viscous and solid elastic properties. 30 G 0 and G 00 respectively represent the elastic and viscous features of the given samples.…”

Section: Preliminary Structural Characterizationmentioning

confidence: 99%

Physicochemical, morpho-structural, and biological characterization of polysaccharides from three Polygonatum spp

Bai

Zhang

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

Rheological and physicochemical properties of polysaccharides extracted from stems of Dendrobium officinale

Cited by 55 publications

References 80 publications

Forward osmosis concentration of high viscous polysaccharides of Dendrobium officinale: Process optimisation and membrane fouling analysis

Forward osmosis concentration of high viscous polysaccharides of Dendrobium officinale: Process optimisation and membrane fouling analysis

Antioxidant activity and rheological properties of the polysaccharides isolated from Ribes stenocarpum maxim with different extraction methods

Physicochemical, morpho-structural, and biological characterization of polysaccharides from three Polygonatum spp

Contact Info

Product

Resources

About