Untitled

Zhauynbaeva, K. S.; Маликова, М. Х.; Rakhimov, D. A.

doi:10.1023/a:1025458115916

Chemistry of Natural Compounds

2003

DOI: 10.1023/a:1025458115916

|View full text |Cite

Untitled

K. S. Zhauynbaeva

М. Х. Маликова

D. A. Rakhimov

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2005

2020

Publication Types

Select...

Article3

Relationship

Self Cite1

Independent2

Authors

Journals

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our laboratory found that the bulb of L. aurea contained, depending on the seasons, from 10.87% to 37.44% polysaccharides (per fresh weight). Some studies have been conducted on the extraction, purification, structural analysis, and biological activity of polysaccharides from Narcissus, e.g., Narcissus tazetta L. [2][3][4][5][6]. However, to the best of our knowledge, there are no published reports on the extraction and phytochemical composition of polysaccharides from L. aurea.…”

mentioning

confidence: 99%

Microwave–assisted extraction and identification of polysaccharide from Lycoris aurea

Zhang

Chen

et al. 2009

Chem Nat Compd

View full text Add to dashboard Cite

Three polysaccharide fractions were separated from the extract of Lycoris aurea using DEAE-52 and Sephadex G-150 column chromatography. FT-IR spectroscopy revealed the typical characteristics of polysaccharide fractions. The molecular weights of three polysaccharides were characterized by HPGFC, which were 31.9 kDa, 35.7 kDa, and 72.7 kDa, respectively. Their chemical compositions were also studied. The conditions for microwave-assisted extraction (MAE) of polysaccharide from L. aurea were investigated through an orthogonal design of L 9 (3 3 ) in this work.Lycoris aurea is a perennial herbaceous plant. It is a member of the Amaryllidaceace family, possesses highly decorative characteristics, and has been used from ancient times in floriculture and medicine. Amaryllidaceace is rich in alkaloids, especially galanthamine, which is a long-acting, selective, reversible, and competitive inhibitor of acetylcholinesterase; therefore, it is a reasonable approximation of the ideal concept of symptomatic Alzheimer′s disease therapy [1].Polysaccharides, another important components, are also present in large amounts in the Amaryllidaceace family, especially in the bulb. Our laboratory found that the bulb of L. aurea contained, depending on the seasons, from 10.87% to 37.44% polysaccharides (per fresh weight). Some studies have been conducted on the extraction, purification, structural analysis, and biological activity of polysaccharides from Narcissus, e.g., Narcissus tazetta L. [2][3][4][5][6]. However, to the best of our knowledge, there are no published reports on the extraction and phytochemical composition of polysaccharides from L. aurea. Microwave-assisted extraction (MAE) is an extraction procedure that, compared to conventional techniques, is fast and uses very little solvent [7]. Therefore, we focused on the conditions for microwave-assisted extracting of polysaccharides from L. aurea, which ubiquitously improved polysaccharide production and shortened procedure time, providing a foundation theory for applying the technology to mass production. To learn more about the identification of L. aurea polysaccharides, a pectic polysaccharide-rich extract from the bulb was purified, and the molecular weights (M w ) and chemical compositions of purified polysaccharides were also measured. Table 1 shows the yields of polysaccharides under the indicated conditions. An orthogonal design [L 9 (3 3 )] was applied to optimize the solide-liquid ratio, temperature, and microwave time. Generally, a higher solid-liquid ratio for a longer time and higher temperature of incubation gave a higher yield of polysaccharide. A significant yield was observed at temperatures from 90°C to 100°C. A longer microwave time produced a higher yield. The solid-liquid ratio also had a significant impact on the overall yield of polysaccharide. The order of impact of the different factors on the yield was: microwave temperature > time of extraction > solid-liquid ratio. A comparison of polysaccharide yield and purity between microwave-assisted and trad...

show abstract

mentioning

confidence: 99%

Microwave–assisted extraction and identification of polysaccharide from Lycoris aurea

Zhang

Chen

et al. 2009

Chem Nat Compd

View full text Add to dashboard Cite

show abstract

“…

…”

mentioning

confidence: 99%

Dynamics of Glucomannan Accumulation in Narcissus poeticus

2005

Self Cite

View full text Add to dashboard Cite

The primary structure of glucomannans (GM) from various Narcissus species is well studied [1,2]. It has been demonstrated that the studied polysaccharides are linear, partially acetylated 1,4-β-glucomannans. However, the dynamics over vegetative phases and the extraction kinetics of GM have not been investigated.We studied the dynamics of GM accumulation and the viscosity of polysaccharide soutions as functions of plant growth and development in order to find the period of maximal GM content in N. poeticus (Amaryllidaceae) bulbs. Plants were collected on the test site of the Institute. Air-dried ground bulbs that were sieved through a 0.25 mm sieve and stabilized by boiling alcohol (96°, 1:10) for one hour were analyzed.GM were isolated by water extraction (1:10 and 1:5) at room temperature. The extracts were evaporated and precipitated with alcohol (96°, 1:3 ratio). The resulting solids were separated, washed with alcohol, and dried. Table 1 lists data for the GM yield.It can be seen that the GM content increased from 2 to 6.4% with plant growth and development.The viscosity was determined from the time for aqueous solutions of samples to flow through a capillary (0.73 mm diameter) in a VPZh viscosimeter (10 mL volume) at 26 ± 0.5°C.The change of characteristic viscosity of GM as a function of plant vegetative period showed that the viscosity was maximal when the aerial part was dying (03.06 [June 3]). GM with high molecular weights were probably accumulating at this time.All samples (1-5) were soluble in water and did not give a color reaction with iodine. Therefore, they did not contain starchy glucan.The kinetics of GM extraction were studied in order to establish its duration. For this we used raw material (6 g) containing the largest amount of GM (03.06) that was obtained as described above. Equilibrium in the N. poeticus bulb:extractant system was established after 30 minutes of contact if the raw material was ground to a particle size of 0.25 mm (Fig. 1). GM did not increase further in the extract. This indicated that the limiting capabilities of the extraction method had been reached under these conditions. Dissolution in water of Narcissus GM formed viscous solutions even at low concentrations (0.5%). Small changes in the concentration caused the viscosity to increase significantly. This is consistent with fibril-like macromolecules that are linked by H-bonds between them and water molecules.

show abstract

Plant-derived glucomannans: Sources, preparation methods, structural features, and biological properties

Shi

Yin

Cui

et al. 2020

Trends in Food Science & Technology

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Untitled

Cited by 3 publications

References 2 publications

Microwave–assisted extraction and identification of polysaccharide from Lycoris aurea

Microwave–assisted extraction and identification of polysaccharide from Lycoris aurea

Dynamics of Glucomannan Accumulation in Narcissus poeticus

Plant-derived glucomannans: Sources, preparation methods, structural features, and biological properties

Contact Info

Product

Resources

About