Chemical Composition and Rheological Properties of Carrageenans from Two Senegalese Soleriaceae Anatheca montagnei Schmitz and Meristotheca senegalensis Feldmann

Fostier, Anne Hélène; Kornprobst, J.-M.; Combaut, Georges

doi:10.1515/botm.1992.35.4.351

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…It is noticeable that reduction in sulphate after alkali treatment was higher for E. isiforme from Yucatan than for Nicaraguan specie ( Table 1). The 3,6 AG contents in alkali-treated carrageenan from E. isiforme from Nicaragua was similar to that reported for Florida E. isiforme (19.4%), but lower than those previously reported for the same species (26%) by Fostier et al (1992) and . It is also evident that the increase in 3,6 AG contents after alkali conversion was lower for the Nicaraguan E. isiforme (Table 1).…”

Section: Discussionsupporting

confidence: 87%

“…These authors argued that the high sulphate content in native carrageenan increased hydrophobicity and, therefore, viscosity. Native carrageenan sulphate contents are within the range for iota-producing Eucheuma species (Cheney et al 1987;Santos 1989;Fostier et al 1992). It is noticeable that reduction in sulphate after alkali treatment was higher for E. isiforme from Yucatan than for Nicaraguan specie ( Table 1).…”

Section: Discussionmentioning

confidence: 78%

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Carrageenan of Eucheuma isiforme (Solieriaceae, Rhodophyta) from Nicaragua

Freile‐Pelegrín

Robledo

2007

J Appl Phycol

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The yield and physicochemical properties of native and alkali treated carrageenan from Eucheuma isiforme harvested from the Nicaraguan coast were investigated. The native carrageenan yield was 57.2% of dry weight and decreased to 43.5% when the alga was alkali treated. Native carrageenan viscosities showed significant differences between native (144.6±3.3 cPs) and treated carrageenan (113.9±2.6 cPs) (p<0.01). Alkali treatment reduced carrageenan sulphate content by 19.3% and increased 3,6 AG content by 13%. Alkali-treated carrageenan formed very weak gels in 1.5% solutions (<50 g cm −2 ). Chemical analysis and FTIR spectra revealed that Eucheuma isiforme from Nicaragua is a good source of relatively pure iota-carrageenan with sufficient quality to serve as a substitute for traditional iota-carrageenan sources.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 78%

Carrageenan of Eucheuma isiforme (Solieriaceae, Rhodophyta) from Nicaragua

Freile‐Pelegrín

Robledo

2007

J Appl Phycol

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“…Chopin et al 1990 (Bellion et al 1983, Whyte et al 1984, Deslandes et al 1990, Chopin et al 1990, Postier et al 1992. The observation that carrageenans rich in MeGal are extracted from Rhabdonia, Erythrocloniwn, and Areschougia therefore broadly supports the taxonomic hypothesis.…”

Section: Discussionmentioning

confidence: 83%

Cell Wall Polysaccharides from Australian Red Algae of the Family Solieriaceae (Gigartinales, Rhodophyta): Highly Methylated Carrageenans from the Genus Rhabdonia

Chiovitti¹,

Liao²,

Kraft³

et al. 1996

Botanica Marina

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The hot water-soluble polysaccharides from RJiabdonia coccinea and R. verticillata were characterised by a combination of constituent sugar analysis, sulphate and pyruvate content assays, infrared (IR) spectroscopy, linkage analysis, and 13 C-nuclear magnetic resonance (NMR) spectroscopy. These revealed unique polysaccharides belonging to the red algal galactan family. The polysaccharides had IR spectra resembling that of icarrageenan, but were rich in 6-0-methylgalactose (ca. 31 mol% and 17mol% for R. coccinea and R. verticillata, respectively). Data from 13 C-NMR spectroscopy provided evidence that the polysaccharides were carrageenans rather than agarocolloids. The preparations contained mainly ι-carrageenan, partially methylated at C(O)6 of the 3-linked galactose residue. The polysaccharide from R. verticillata also contained significant quantities of 3-0-methylgalactose and pyruvate. The unusual sugar 3-0-methylgalactose occurred primarily as main-chain 4-linked residues, with a small proportion in the form of terminal residues. Other structural variations occurred in the polysaccharides of both species. IntroductionThe phycocolloids from red algae are variously substituted galactans which form the dominant components of the matrix phase of algal cell walls (see Craigie 1990 for a review). The gelling and thickening properties and protein-reactivity of these phycocolloids have led to their widespread commercial use in industry (Glicksman 1987, Stanley 1990, Selby and Whistler 1993, Therkelsen 1993. The chemistry of red algal galactans has also been used to supplement classical criteria, such as morphology, anatomy, and life history studies, in the formulation of taxonomic hypotheses (e. g. Gabrielson and Garbary 1986, Doty 1989, Liao et al 1993, Chiovitti et al 1995.The galactans from red algae consist of repeating disaccharide units of alternating β-1,3-and a-1,4-linked galactopyranosyl residues. The disaccharide units are variously substituted with sulphate ester, methyl ether, pyruvate acetal, or single glycosyl side branches and the 4-linked galactose residue may be converted into 3,6-anhydrogalactose. There are two main classes of these galactans, the agars and the carrageenans. In ag rs, the 44inked residue is in the Lconfiguration, whereas in carrageenans, it is in the Dconfiguration. The 3-linked residue is in the D-configuration in both classes of galactan. Carrageenans are typically more sulphated than agars, and idealised carrageenan types (e. g. κ-, ι-, °1-) have traditionally been defined according to their sulphate substitution pattern and their 3,6-anhydrogalactose content. By contrast, agars typically contain significant amounts of methyl ether or pyruvate acetal substitution (Craigie 1990). The type and amount of substitution modify solution properties of red algal polysaccharides , Arnott et al 1974, Guiseley 1987.The Australian coastline is rich in both its abundance and diversity of red algae, but their phycocolloids have not been extensively studied. We are currently undertaking a progr...

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“…A maior quantidade de i-CARs (32,64%) foi obtida com a utilização da papaína (M I), enquanto 22,50% resultaram da extração com água (80°C) (M II), respectivamente, a partir da alga desidratada (25°C) e triturada. Esses rendimentos estão de acordo com aqueles obtidos em espécies de algas da família Solieriaceae, tais como Anatheca montagnei (24,00%), Eucheuma spinosum (35,00%) e Meristotheca senegalensis (36,00%) (FOSTIER et al, 1992). Também ao submeter a alga S. filiformis, coletada de banco natural, a extrações aquosas, HOLANDA (2007) obteve rendimento de 32,70% de i-CARs, porém, desse total, 1,40; 98,20 e 0,40% foram obtidos, respectivamente, a 25; 90 e 120°C.…”

Section: Resultsunclassified

Isolamento, fracionamento e atividade anticoagulante de iota-carragenanas da Solieria filiformis

et al. 2010

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RESUMO Este estudo teve como objetivo isolar, fracionar e avaliar o potencial anticoagulante de iota-carragenanas (iCARs) da rodofícea Solieria filiformis, quando obtidas por dois métodos de extração (M I e M II). As i-CARs foram isoladas ABSTRACT This study aimed to isolate, fractionate and evaluate the anticoagulant potential of iota-carrageenans (i-CARs) from Solieria filiformis when two extraction methods (M I and M II) were used. i-CARs were isolated with papain in 0.1M sodium acetate (pH 5.0) containing 5mM cystein and 5mM EDTA (M I) or water (80°C) (M II), and then their chemical composition of total carbohydrates, free sulfate (FS) and contaminant proteins were determined. i-CARs were submitted to anionexchange chromatography (DEAE-cellulose) using a sodium chloride gradient,being evaluated the activated partial thromboplastin time (APTT) and prothrombin time of obtained fractions and compared to heparin (

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Chemical Composition and Rheological Properties of Carrageenans from Two Senegalese Soleriaceae Anatheca montagnei Schmitz and Meristotheca senegalensis Feldmann

Cited by 12 publications

References 13 publications

Carrageenan of Eucheuma isiforme (Solieriaceae, Rhodophyta) from Nicaragua

Carrageenan of Eucheuma isiforme (Solieriaceae, Rhodophyta) from Nicaragua

Cell Wall Polysaccharides from Australian Red Algae of the Family Solieriaceae (Gigartinales, Rhodophyta): Highly Methylated Carrageenans from the Genus Rhabdonia

Isolamento, fracionamento e atividade anticoagulante de iota-carragenanas da Solieria filiformis

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