338. The structure of alginic acid. Part II

Chanda, S. K.; Hirst, E. L.; Percival, Elizabeth; Ross, A. G.

doi:10.1039/jr9520001833

Cited by 61 publications

(11 citation statements)

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“…The typical polysaccharides in seaweed are carrageenan, alginic acid, and fucoidan, which are mucilaginous polysaccharides that can be obtained through heated extraction from the ECM of any seaweed. Alginic acid has a copolymer polysaccharide consisting of the uronic acid of β-mannuronic acid and α-L-guluronic acid (Chanda et al 1939;Cretcher 1929, 1932). The mucilaginous polysaccharides of seaweed have the characteristics of gelling and thickening and are thus widely used as thickeners or gelators.…”

Section: Resultsmentioning

confidence: 99%

The effect of the water-soluble polymer released from Botryococcus braunii Showa strain on solvent extraction of hydrocarbon

et al. 2014

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Hydrocarbons are easily extracted by organic solvents such as n-decane from wet samples of Botryococcus braunii by thermal pretreatment at 90°C even after being cooled to room temperature. However, hydrocarbon recoveries are not as readily achieved at room temperature from samples pretreated at temperatures lower than 80°C. This suggests that there is the point of no return for pretreatment temperature that enables effective solvent extraction of hydrocarbons at room temperature from wet algal samples of B. braunii. To elucidate the mechanism of hydrocarbon recovery from B. braunii following thermal pretreatments, we investigated the thermophysical properties of the water phase separated from heated algal slurry. Differential scanning calorimetry (DSC) measurements revealed sol-gel transitions in the water phase of algal slurry after protein denaturation at 64°C in samples that was pretreated at 70 or 80°C but not in those pretreated at 90°C. Furthermore, the pretreated >70°C water-soluble polymers revealed polysaccharides composed of galactose, arabinose, and uronic acid. These results suggest that the transition from sol state to gel state of water-soluble polysaccharides in algal slurry prevented hydrocarbon recovery with organic solvents since hydrocarbons were easily recovered from sol state samples pretreated at 70 or 80°C when the extraction temperature was kept the same as the pretreatment temperature. These results reveal that the presence of water-soluble polymers with gelation ability in the water phase and removal of these polymers in sol state enable effective recovery of hydrocarbons at room temperature after thermal pretreatments.

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Section: Resultsmentioning

confidence: 99%

The effect of the water-soluble polymer released from Botryococcus braunii Showa strain on solvent extraction of hydrocarbon

et al. 2014

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“…The mucilaginous polysaccharides comprise acidic sugars such as sulfate sugar and uronic acid. Alginic acid has a molecular weight of 2.0 × 10 5 to 2.0 × 10 6 and is a copolymer consisting of the uronic acid of β-mannuronic acid and α-L-guluronic acid [21][22][23]. The mucilaginous polysaccharides of seaweed provide gelling and thickening characteristics and are thus widely used as thickeners or gelators.…”

Section: Chemical Components and Molecular Weight Of Water-soluble Pomentioning

confidence: 99%

Effect of amphiphilic polysaccharides released from Botryococcus braunii Showa on hydrocarbon recovery

et al. 2015

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“…Naturally occurring biopolymers like alginate, extracted from algae, have been known to exhibit excellent adsorption ability for metal ions (Abu Al-Rub, El Naas, Benyahia, & Ashour, 2004;Aksu, Eretli, & Kutsal, 1998;Angyal, 1989;Chanda, Hirst, Percival, & Ross, 1952;Chen, Tendeyong, & Yiacoumi, 1997;Muzzarelli, 1973).…”

Section: Introductionmentioning

confidence: 98%

Effect of calcium ion (cross-linker) concentration on porosity, surface morphology and thermal behavior of calcium alginates prepared from algae (Undaria pinnatifida)

Pathak

Yun

Lee

et al. 2010

Carbohydrate Polymers

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338. The structure of alginic acid. Part II

Cited by 61 publications

References 0 publications

The effect of the water-soluble polymer released from Botryococcus braunii Showa strain on solvent extraction of hydrocarbon

The effect of the water-soluble polymer released from Botryococcus braunii Showa strain on solvent extraction of hydrocarbon

Effect of amphiphilic polysaccharides released from Botryococcus braunii Showa on hydrocarbon recovery

Effect of calcium ion (cross-linker) concentration on porosity, surface morphology and thermal behavior of calcium alginates prepared from algae (Undaria pinnatifida)

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