Fucans from a Tunisian brown seaweed Cystoseira barbata: Structural characteristics and antioxidant activity

Sellimi, Sabrine; Kadri, Nabil; Barragan‐Montero, Véronique; Laouer, Hocine; Hajji, Mohamed; Nasri, Monçef

doi:10.1016/j.ijbiomac.2014.02.041

Cited by 61 publications

(32 citation statements)

References 43 publications

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“…Signals between δ 3.6 and 4.1 ppm may be attributed to characteristic resonances of ring protons (H2-H5). Signals at δ 4.0-4.7 ppm are characteristic of β-anomeric protons 27) .Whereas a signal at δ 5.24 ppm, which was overlapping with the signal of the solvent, belonged to the α-anomeric protons 28) .…”

Section: Physico-chemical Characterizationmentioning

confidence: 97%

Microwave-assisted extraction and pharmacological evaluation of polysaccharides from Posidonia oceanica

Salem

Abdelhamid

Hammi

et al. 2017

Bioscience, Biotechnology, and Biochemistry

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Microwave-assisted extraction was employed for the isolation of polysaccharides from Posidonia oceanica (PPO). The extracting parameters were optimized adopting response surface methodology. The highest polysaccharide yield (2.55 ± 0.09%), which is in concordance with the predicted value (2.76%), was obtained under the following conditions: extraction time 60 s, liquid-solid ratio of 50:1 (mL/g) and power of 800 W. This polysaccharide, with molecular weight of 524 KDa, characterized by gas chromatography-mass spectrometry showed that PPO was mainly composed of galactose, glucose, and arabinose with molar percentages 25.38, 24.37, and 21.64%, respectively. The pharmacological evaluation of PPO using animal models at the dose of 100 mg/kg indicated a significant anti-inflammatory activity with a percentage of inhibition of edema of 54.65% and a significant antinociceptive activity with 78.91% inhibition of writhing for peripheral analgesic activity and an increase in the hot plate reaction time for central analgesic activity.

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Section: Physico-chemical Characterizationmentioning

confidence: 97%

Microwave-assisted extraction and pharmacological evaluation of polysaccharides from Posidonia oceanica

Salem

Abdelhamid

Hammi

et al. 2017

Bioscience, Biotechnology, and Biochemistry

View full text Add to dashboard Cite

show abstract

“…Sellimi et al [155] found that sulfation at C-4 position of the polysaccharide has strong antioxidant activity (100% inhibition of DPPH at 1.5 mg/mL). Similarly, Mou et al [67] extracted three sulfated polysaccharides from Chinese edible sea cucumber and found that C-4 sulfation polysaccharide showed the highest antioxidant activity.…”

Section: Sulfation Degree and Positionmentioning

confidence: 99%

The Antioxidant Activity of Polysaccharides Derived from Marine Organisms: An Overview

et al. 2019

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Marine-derived antioxidant polysaccharides have aroused extensive attention because of their potential nutritional and therapeutic benefits. However, the comprehensive comparison of identified marine-derived antioxidant polysaccharides is still inaccessible, which would facilitate the discovery of more efficient antioxidants from marine organisms. Thus, this review summarizes the sources, chemical composition, structural characteristics, and antioxidant capacity of marine antioxidant polysaccharides, as well as their protective in vivo effects mediated by antioxidative stress reported in the last few years (2013–2019), and especially highlights the dominant role of marine algae as antioxidant polysaccharide source. In addition, the relationships between the chemical composition and structural characteristics of marine antioxidant polysaccharides with their antioxidant capacity were also discussed. The antioxidant activity was found to be determined by multiple factors, including molecular weight, monosaccharide composition, sulfate position and its degree.

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“…Isolation of the sodium alginate from brown algae referred to Sellimi et al [12] with slight modifications. Brown Algae (50 g) was depigmented and defatted sequentially with acetone-methanol (7 : 3) and chloroform for 24 h at 30°C under constant stirring.…”

Section: Sodium Alginate Isolation From Brown Algaementioning

confidence: 99%

Characterization and properties of sodium alginate from brown algae used as an ecofriendly superabsorbent

Helmiyati

Aprilliza

2017

IOP Conf. Ser.: Mater. Sci. Eng.

101

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Abstract. Sodium alginate obtained from the extraction of brown algae is used as the backbone for the synthesis of superabsorbent nanocomposite copolymerization. The first stage of extraction is the demineralization process using 0.1 M HCl solution and then 2% Na2CO3 solution for 2 hours at 60°C. The rendement of sodium alginate obtained was 44.32% with molecular weight of 40680 g/mol with measurement of the intrinsic viscosity. FTIR spectra of sodium alginate showed mannuronic acid functional group at wavenumber 884 cm -1 and the uronic acid at wavenumber 939 cm -1 , OH functional group at wavenumber 3200-3400 cm -1 , and CH2 stretching at wavenumber 2928 cm -1 . The diffraction pattern of isolated sodium alginate has specific 2θ at 13.068 and 21.096, amorphous intensity found specific 2θ at 18.058, and the obtained crystallinity degree of the sodium alginate is equal to 29.292% from the XRD analysis. The morphological analysis by SEM shows fibrils of isolated sodium alginate. The success isolation of sodium alginate from brown algae is supported by DSC which shows the decomposition temperature of pure sodium alginate and isolated alginate have close values, namely 251.12°C for pure sodium alginate and 229.90°C for isolated sodium alginate.

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Fucans from a Tunisian brown seaweed Cystoseira barbata: Structural characteristics and antioxidant activity

Cited by 61 publications

References 43 publications

Microwave-assisted extraction and pharmacological evaluation of polysaccharides from Posidonia oceanica

Microwave-assisted extraction and pharmacological evaluation of polysaccharides from Posidonia oceanica

The Antioxidant Activity of Polysaccharides Derived from Marine Organisms: An Overview

Characterization and properties of sodium alginate from brown algae used as an ecofriendly superabsorbent

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