Rheological behavior and antioxidant activity of a highly acidic gum from Althaea officinalis flower

Tabarsa, Mehdi; Anvari, Mohammad; Joyner, Helen S.; Behnam, Shabnam; Tabarsa, Alireza

doi:10.1016/j.foodhyd.2017.02.009

Cited by 52 publications

(18 citation statements)

References 34 publications

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“…As shown in Figure 5 , when concentration of DACP-HWE and DACP-UAE solutions were increased from 5 to 20 mg/mL, apparent viscosity at shear rate of 0.1 s −1 were increased from 4.92 to 74.76 Pa.s and from 0.09 to 2.14 Pa.s, respectively. Increased entanglement and aggregation of molecule chains at higher concentrations may be responsible for higher viscosity [ 45 ]. However, apparent viscosity of DACP-UAE was significantly lower than that of DACP-HWE with same concentration at the same shear rate.…”

Section: Resultsmentioning

confidence: 99%

Effects of Ultrasound Treatment on Extraction and Rheological Properties of Polysaccharides from Auricularia Cornea var. Li.

Wang

Guo

2019

Molecules

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Auricularia cornea var. Li. is an edible fungi and polysaccharides in Auricularia cornea var. Li. may have bioactive activities. Polysaccharides from Auricularia cornea var. Li. (ACP) was extracted using ultrasound-assisted extraction (UAE) method and compared with hot water extraction (HWE) for extraction yield, extraction rate, purity of polysaccharides, microstructure of residues after extraction, preliminary structure and rheological properties of polysaccharides. Optimum conditions for UAE (particle size of 150–200 mesh, water to raw material ratio of 70:1, extraction temperature at 70 °C for 40 min, ultrasonic amplitude of 40%) and HWE (particle size of 150–200 mesh, water to raw material ratio of 60:1, extraction temperature at 90 °C for 3.0 h) were obtained via single-factor experiment. Under optimum conditions, extraction yield of polysaccharides by UAE was 30.99 ± 1.93% which showed no significant difference with that by HWE (30.35 ± 1.67%) (P > 0.05). Extraction rate (29.29 ± 1.41%) and purity (88.62 ± 2.80%) of polysaccharides by UAE were higher than those by HWE (extraction rate of 24.95 ± 2.78% and purity of 75.33 ± 6.15%) (P < 0.05). Scanning Electron Microscopy (SEM) images of residues by UAE showed more broken cells than those by HWE. Fourier Transform Infrared (FTIR) spectra showed that the dialyzed ACP extracted by HWE and UAE (DACP-HWE and DACP-UAE) had similar characteristic absorption peaks of polysaccharides. Both DACP-HWE and DACP-UAE solutions showed typical shear thinning and temperature-independent behaviors (25–90 °C) and UAE resulted in polysaccharides with remarkably lower viscosity in comparison with HWE. DACP-UAE solutions exhibited more liquid-like state while DACP-HWE solutions solid-like system. Data indicated that ultrasound treatment may be a useful means for extraction of polysaccharides from Auricularia cornea var. Li.

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Section: Resultsmentioning

confidence: 99%

Effects of Ultrasound Treatment on Extraction and Rheological Properties of Polysaccharides from Auricularia Cornea var. Li.

Wang

Guo

2019

Molecules

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“…The polysaccharide extraction yield was 18.04 ± 1.81% (W/W), which was relative higher than that of Althaea officinalis L . flower (9.0%) (Tab arsa, Anvari, Joyner, Behnam, & Tab arsa, 2017) or Lonicera japonica flower (4.6%) (Lin et al., 2016) and was comparable with the yield of pectin extraction from apple pomace (19.8%) (Wikiera, Mika, Starzynska‐Janiszewska, & Stodolak, 2016). GFPF mainly consisted of neutral sugars (46.83 ± 3.14) and small amount of proteins (1.63 ± 0.34%).…”

Section: Resultsmentioning

confidence: 83%

Physicochemical and rheological characterization of pectin‐rich polysaccharides from Gardenia jasminoides J. Ellis flower

Chen¹,

Xue²,

Ni³

et al. 2020

Food Science & Nutrition

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Gardenia ( Gardenia jasminoides J. Ellis) is regarded as an edible medicine plant in China. Here, gardenia flower polysaccharide fraction (GFPF) was extracted by water at 90°C and its chemical composition, rheological properties, and antioxidant activities of GFPF were investigated. The GFPF extraction yield was 18.04 ± 1.81% (W/W) and mainly comprised neutral sugars (46.83 ± 3.14%), uronic acid (35.21 ± 0.17%), protein (1.63 ± 0.34%), and total phenol (9.49 ± 0.08 mgGAE/g). Galacturonic acid (41.05 ± 0.59%) was the main monosaccharide, and galactose, glucose, arabinose, rhamnose, xylose, mannose, and glucuronic acid were also detected in GFPF. Its degree of esterification was 32.76 ± 1.52%. FT‐IR spectra analysis showed a similar absorption pattern between GFPF and pectin from apple. The results suggested that GFPF was low methoxy pectin. Thermogravimetric analysis and zeta potential analysis indicated that the pectin was stable under high temperature and alkaline condition. Steady rheology showed that the GFPF dispersion was a shear thinned pseudoplastic fluid with high apparent viscosities at concentration above 2%. The degree of pseudoplasticity of the solutions increased with the concentrations increased and the temperatures decreased. DPPH and ABTS free radical scavenging assay indicated that GFPF had relatively high antioxidant activity. The results showed that gardenia flower was rich in pectin polysaccharides with low methoxy pectin. It had high apparent viscosities at concentration above 2% and had good antioxidant activity. The data suggested that GFPF can be a new resource of low methoxy pectin with potential application as thicker or gelling agents in food industry.

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“…The polysaccharides (WBP and WBP‐F) were taken into a hydrolysis tube and treated with 4 M trifluoroacetic acid (TFA) at 100°C for 6 hr. Then, the hydrolysates of polysaccharides were reduced by sodium borodeuteride and then acetylated with acetic anhydride (Tabarsa, Anvari, Joyner (Melito), Behnam, and Tabarsa, 2017). Finally, the product was injected into a gas chromatography‐mass spectrometer (GC–MS; 6890N/MSD5973, Agilent Technologies, Santa Clara, CA).…”

Section: Methodsmentioning

confidence: 99%

Extraction, structural elucidation and immunostimulating properties of water‐soluble polysaccharides from wheat bran

Cao

Tabarsa

et al. 2020

J Food Biochem

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A water‐soluble polysaccharide was extracted from wheat bran (WBP) and investigate their structural characteristics and immunostimulatory activities. The chemical composition of WBP and purified fraction (WBP‐F) mainly consists of neutral sugars (91.2 ± 1.2 and 98.7 ± 1.2%), proteins (8.6 ± 0.3 and 0.2 ± 0.1%) and uronic acids (0.7 ± 0.1 and 0.6 ± 0.1%). The molecular weight (Mw) of WBP and WBP‐F was calculated as 911.7 and 510.2 × 103 g/mol, respectively. The WBP‐F stimulates the RAW264.7 cells through the production of nitric oxide and various cytokines. The treatment of WBP‐F facilitated the phosphorylation of P38, JNK, ERK, and NF‐ƘB in RAW264.7 cells suggesting that they might stimulate RAW264.7 cells through the activation of NF‐ƙB and MAPKs pathways. Furthermore, the structural details of WBP‐F were studied by GC‐MS and NMR spectrum, which confirms that the main backbone consists of 4‐α‐D‐linked glucopyranosyl residues with branching points at C‐6. Practical applications Wheat bran is a potential source of health‐promoting compounds. It has been reported that polysaccharides of wheat bran containing numerous beneficial activities. In this study, the wheat bran polysaccharide was extracted, fractionated and investigated their immunostimulatory activities. The results found in this study revealed that the purified polysaccharide from wheat bran potentially enhanced the RAW264.7 cells activation. Hence, these polysaccharides could be utilized as a potent immunity‐enhancing agent in food and pharmaceutical industries.

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Rheological behavior and antioxidant activity of a highly acidic gum from Althaea officinalis flower

Cited by 52 publications

References 34 publications

Effects of Ultrasound Treatment on Extraction and Rheological Properties of Polysaccharides from Auricularia Cornea var. Li.

Effects of Ultrasound Treatment on Extraction and Rheological Properties of Polysaccharides from Auricularia Cornea var. Li.

Physicochemical and rheological characterization of pectin‐rich polysaccharides from Gardenia jasminoides J. Ellis flower

Extraction, structural elucidation and immunostimulating properties of water‐soluble polysaccharides from wheat bran

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