Arabinan-rich rhamnogalacturonan-I from flaxseed kernel cell wall

Ding, Huihuang; Cui, Steve W.; Goff, H. Douglas; Chen, Jie; Wang, Qi; Han, Nam Fong

doi:10.1016/j.foodhyd.2015.01.011

Cited by 37 publications

(25 citation statements)

References 62 publications

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“…These results show that the extracts, although rich in arabinoxylans Cui, Mazza, Oomah et al, 1994;Ding, Qian, Goff, Wang, & Cui, 2018;Guilloux, Gaillard, Courtois, Courtois, & Petit, 2009), also have pectic polysaccharides. Nevertheless, the absence of 1,4 and 1,4,6-Glc shows that the xyloglucan reported by Ding et al (2015), Ding, Cui, Goff, Guo, and Wang (2016) and Ray et al (2013) is not present in these extracts, as the xyloglucan requires alkali solutions to be extracted.…”

Section: Physicochemical Propertiesmentioning

confidence: 91%

Effect of extraction temperature on rheological behavior and antioxidant capacity of flaxseed gum

Vieira

Mantovani

Raposo

et al. 2019

Carbohydrate Polymers

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Soluble flaxseed gum (SFG) extracted at different temperatures (25, 40, and 60°C) was analyzed in relation to the yield, polysaccharides and phenolics composition, surface charge, color, and rheological properties. The yield of SFG extract increased as the extraction temperature increased. The SFG xylan was the main component regardless the extraction temperature, but a reduction of substituents on the xylose chain was observed when increasing the extraction temperature. The phenolic compounds were also affected by the extraction temperature, influencing the antioxidant capacity of the gum. For all the extraction temperatures, SFG aqueous solutions showed a shear time-independent and shear-thinning behavior. Furthermore, oscillatory measurements showed a prevailing viscous character, but the decrease of the extraction temperature resulted in an increase of both G' and G". Therefore, SFG extracted at low extraction temperatures showed higher viscous and elastic properties, while high extraction temperatures increased the antioxidant activity. Vaisey-Genser, 2003). The SFG is composed by a neutral and an acidic fraction of polysaccharides and proteins (

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Section: Physicochemical Propertiesmentioning

confidence: 91%

Effect of extraction temperature on rheological behavior and antioxidant capacity of flaxseed gum

Vieira

Mantovani

Raposo

et al. 2019

Carbohydrate Polymers

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“…In order to deal with this problem, trimers of 1,5-linked 3-O-Me-α-Araf and 1,4-linked 3-O-Me-β-Galp were simulated in silico on website http: //www.nmrdb.org/, and the corresponding NMR data ( 1 H NMR and 13 C NMR) were generated to study the effect of native 3-O-methylation at C3 on the chemical shifts δ C and δ H of C and H to which OCH 3 is linked and on the adjacent C and H. Based on this information, the anomeric and other ring carbons and protons of methylated monosaccharides were assigned. (Ding et al, 2015;Dourado, Cardoso, Silva, Gama, & Coimbra, 2006), respectively, while the peak observed at 105.7 ppm was assigned to anomeric carbons of →4)-3-O-Me-β-Galp-(1→ and → 4)-β-Galp-(1→ (Habibi et al, 2005). There were two small signals observed at 101.94 and 98.71 ppm.…”

Section: Nmr Analysis Of Tw1mentioning

confidence: 93%

A unique polysaccharide containing 3- O -methylarabinose and 3- O -methylgalactose from Tinospora sinensis

Nagar

Hensel

Mischnick

et al. 2018

Carbohydrate Polymers

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Tinospora sinensis (Lour.) Merrill is of great therapeutic significance in Indian traditional medicine. Crude polysaccharides were isolated from methanol pre-extracted stems of dried material by successive extractions with cold water, hot water and NaOH (0.25 mol/L) in 0.98, 0.55 and 0.70 % yields respectively. Cold water soluble polysaccharides (CWSP) were purified and fractionated by ion exchange chromatography on DEAE-Sephacel. Neutral polysaccharides were further fractionated on Sepharose CL6B to yield three fractions TW1, TW2, TW3. The study further focuses on structural elucidation of TW1. TW1 was obtained in 0.8 % yield relative to CWSP, with MW of 1.6 × 10 Da. It was composed of 3-O-methyl-arabinose, 3-O-methyl-galactose and galactose in molar ratio of 1.0:6.3:0.9 respectively. Based on per-deuteromethylation, NMR and ESI-MS analyses, TW1 was composed of 1,4-linked 3-O-methyl-β-d-galactopyranose and β-d-galactopyranose backbone with branching at O-6 of 3-O-methyl-β-d-galactosyl residues by 1,5-linked 3-O-methyl-α-l-arabinofuranoside chains. 3-O-methyl-arabinose and 3-O-methyl-galactose have first ever been reported in any polysaccharide and Tinospora genus, respectively.

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“…50 In addition, the 1 H NMR spectrum revealed five primary linkage patterns at δ 4.07, 3.92, 3.84, 3.77, 3.90, indicating that the carbon atoms were mainly in the βconfiguration. 51 Signals ranging between 4.7 and 4.3 ppm were assigned to the anomeric proton of galactose and glucose residues, which were…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Novel Flaxseed Gum Nanocomposites Are Slow Release Iron Supplements

Liang

Huang

Shim

et al. 2018

J. Agric. Food Chem.

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Nanocomposites, based on iron salts and soluble flaxseed gum (FG), were prepared as potential treatments of iron deficiency anemia (IDA). FG was extracted, characterized, and formulated into iron-loading nanocomposites via ion-exchange against FeCl, Fe(SO), FeCl, and FeSO·7HO. FG-iron nanocomposites preparation condition was optimized, and physicochemical properties of the nanocomposites were investigated. In vitro release kinetics of iron in simulated gastric fluid (SGF) was also evaluated. FG heteropolysaccharide, consisting of rhamnose (33.73%), arabinose (24.35%), xylose (14.23%), glucose (4.54%), and galactose (23.15%) monosaccharides, linked together via varieties of glycosidic bonds, was a good recipient for both ferric and ferrous irons under screened conditions (i.e., 80 °C, 2 h, I/G = 1:2). Iron loaded contents in the nanocomposites prepared from FG-FeCl, FG-Fe(SO), FG-FeCl, and FG-FeSO·7HO were 25.51%, 10.36%, 5.83%, and 22.83%, respectively. Iron in these nanocomposites was mostly in a bound state, especially in FG-FeCl, due to chelation forming bonds between iron and polysaccharide hydroxyl or carboxyl groups and formed stable polysaccharide-iron crystal network structures. Free iron ions were effectively removed by ethanol treatments. Because of chelation, the nanocomposites delayed iron release in SGF and the release kinetics were consistent with Korsmeyer-Peppas model. This indicates that such complexes might reduce side effects of free iron in human stomach. Altogether, this study indicates that these synthetic FG-iron nanocomposites might be developed as novel iron supplements for iron deficiency, in which FG-FeCl is considered as the best option.

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Arabinan-rich rhamnogalacturonan-I from flaxseed kernel cell wall

Cited by 37 publications

References 62 publications

Effect of extraction temperature on rheological behavior and antioxidant capacity of flaxseed gum

Effect of extraction temperature on rheological behavior and antioxidant capacity of flaxseed gum

A unique polysaccharide containing 3- O -methylarabinose and 3- O -methylgalactose from Tinospora sinensis

Novel Flaxseed Gum Nanocomposites Are Slow Release Iron Supplements

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