The sulfated polysaccharide from a marine red microalga as a platform for the incorporation of zinc ions

Liberman, Gal Netanel; Ochbaum, Guy; Arad, Shoshana; Bitton, Ronit

doi:10.1016/j.carbpol.2016.07.025

Cited by 35 publications

(15 citation statements)

References 41 publications

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“…As the critical concentration is related with the intrinsic viscosity, and thus with the molecular weight of the polymers, a low critical overlap concentration was indeed expected for the high molecular weight polymers in the extracellular fractions. Shear-thinning behavior was previously reported by several authors for 1% polysaccharide solutions (Eteshola et al, 1998;Geresh et al, 2002;Liberman, Ochbaum, Arad, & Bitton, 2016). Moreover, suspensions of EPS showed a higher viscosity and a larger shear-thinning degree compared to EPMS.…”

Section: Rheological Characterization Of the Suspensionssupporting

confidence: 69%

“…Eteshola et al (1998) even reported a decreased viscosity in presence of NaCl, KCl or CaCl2, however, highly concentrated electrolyte solutions were used in that study (Eteshola et al, 1998). Liberman et al (2016) reported that the addition of Zn 2+ only led to screening of negative charges of the polysaccharides, resulting in a slight viscosity increase, but did not lead to any network formation. The authors concluded that a low concentration of Zn 2+ (250 ppm) was sufficient to screen most of these charges, while further addition of ions did not affect the viscosity (Liberman et al, 2016).…”

mentioning

confidence: 92%

“…Liberman et al (2016) reported that the addition of Zn 2+ only led to screening of negative charges of the polysaccharides, resulting in a slight viscosity increase, but did not lead to any network formation. The authors concluded that a low concentration of Zn 2+ (250 ppm) was sufficient to screen most of these charges, while further addition of ions did not affect the viscosity (Liberman et al, 2016). In the current study, intrinsic cations were present in high amounts in all cell wall fractions (Fig.…”

mentioning

confidence: 99%

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Molecular and rheological characterization of different cell wall fractions of Porphyridium cruentum

Bernaerts

Kyomugasho

Looveren

et al. 2018

Carbohydrate Polymers

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Cell wall related polysaccharides of the red microalga Porphyridium sp. were shown to be a promising source of new sustainable thickening agents. Isolated extracellular polysaccharides (EPS) consisted of high molecular weight polymers, showing a higher intrinsic viscosity compared to several commercially used hydrocolloids. Aqueous solutions of EPS (2% w/w) were characterized by substantial viscosities and weak gel behavior. Even though the extracted water soluble cell wall polysaccharides exhibited the same monosaccharide profile as EPS (composed of galactose, glucose, xylose and glucuronic acid), a lower molecular weight and intrinsic viscosity was observed for this fraction, resulting in poor rheological properties. Therefore, it was hypothesized that the physicochemical properties were related with a different molecular structural organization of these monosaccharides and sulfate groups. The main challenge for commercialization of extracellular polysaccharides of Porphyridium sp. remains the purification of these fractions to obtain polysaccharide extracts with low protein and salt contents.

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Section: Rheological Characterization Of the Suspensionssupporting

confidence: 69%

mentioning

confidence: 92%

mentioning

confidence: 99%

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Molecular and rheological characterization of different cell wall fractions of Porphyridium cruentum

Bernaerts

Kyomugasho

Looveren

et al. 2018

Carbohydrate Polymers

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“…In a study developed by Liberman et al [75], it was found that the polysaccharide from Porphyridium sp. showed antibacterial activity against Escherichia coli (72%) and Bacillus subtilis (35% reduction).…”

Section: Functional Characteristicsmentioning

confidence: 99%

Microalgae Polysaccharides: An Overview of Production, Characterization, and Potential Applications

et al. 2021

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Microalgae and cyanobacteria are photosynthetic microorganisms capable of synthesizing several biocompounds, including polysaccharides with antioxidant, antibacterial, and antiviral properties. At the same time that the accumulation of biomolecules occurs, microalgae can use wastewater and gaseous effluents for their growth, mitigating these pollutants. The increase in the production of polysaccharides by microalgae can be achieved mainly through nutritional limitations, stressful conditions, and/or adverse conditions. These compounds are of commercial interest due to their biological and rheological properties, which allow their application in various sectors, such as pharmaceuticals and foods. Thus, to increase the productivity and competitiveness of microalgal polysaccharides with commercial hydrocolloids, the cultivation parameters and extraction/purification processes have been optimized. In this context, this review addresses an overview of the production, characterization, and potential applications of polysaccharides obtained by microalgae and cyanobacteria. Moreover, the main opportunities and challenges in relation to obtaining these compounds are highlighted.

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“…SWP from some seaweeds have become very important products in the food industry and also possess biological activity of potential medicinal value, such as anti-allergy, anticancer, anticoagulant, anti-inflammation, antioxidant, and antiviral [9,[51][52][53]. SWP are commonly found in three major groups of seaweeds: brown seaweeds (Phaeophyta), green seaweeds (Chlorophyta), and red seaweeds (Rhodophyta).…”

Section: Sulfated Seaweed Polysaccharides (Swp)mentioning

confidence: 99%

Antioxidant Activity of Sulfated Seaweeds Polysaccharides by Novel Assisted Extraction

Wu¹

2017

Solubility of Polysaccharides

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Seaweeds have an extremely numerous of species in the world and been able to be divided into several developmental systems. Broadly, three types of seaweeds can be defined according to their color: brown seaweeds, green seaweeds, and red seaweeds. Thousands of years ago, mankind used seaweeds as food and medicine. Seaweed extracts are gaining increasing attention due to their unique composition and the potential for widespread use in industry. A variety of novel (green) extraction techniques have been devised for converting seaweed biomass into seaweed extracts, such as enzyme-assisted extraction (EAE), microwave-assisted extraction (MAE), pressurized liquid extraction (PLE), supercritical fluid extraction (SFE), and ultrasound-assisted extraction (UAE), which are capable of extracting seaweeds' biologically active compounds without causing degradation. Seaweed extracts contain compounds, such as carbohydrates, proteins, minerals, oils, fats, and polyunsaturated fatty acids and abundant bioactive compounds, such as antioxidants, pigments, and sulfated seaweed polysaccharides (SWP), as well as antibacterial, antifungal, anti-inflammatory, antioxidation, antitumor, antiviral, and hypolipidemic effect. The purpose of this article is to describe the antioxidant activity of SWP of brown seaweeds, green seaweeds, and red seaweeds by novel assisted extraction.

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The sulfated polysaccharide from a marine red microalga as a platform for the incorporation of zinc ions

Cited by 35 publications

References 41 publications

Molecular and rheological characterization of different cell wall fractions of Porphyridium cruentum

Molecular and rheological characterization of different cell wall fractions of Porphyridium cruentum

Microalgae Polysaccharides: An Overview of Production, Characterization, and Potential Applications

Antioxidant Activity of Sulfated Seaweeds Polysaccharides by Novel Assisted Extraction

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