Results 151 to 160 of about 19,259 (181)
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Galactan sulfate of Grateloupia indica: Isolation, structural features and antiviral activity
Phytochemistry, 2007Natural compounds offer interesting pharmacological perspectives for antiviral drug development with regard to broad-spectrum antiviral properties and novel modes of action. In this study, we have analyzed polysaccharide fractions isolated from Grateloupia indica.
Kausik, Chattopadhyay +5 more
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A 2-sulfated, 3-linked α-l-galactan is an anticoagulant polysaccharide
Carbohydrate Research, 2002Marine alga is an abundant source of sulfated polysaccharides with potent anticoagulant activity. However, several attempts to identify the specific structural features in these compounds, which confer the biological activity, failed due to their complex, heterogeneous structure.
Mariana S, Pereira +3 more
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International Journal of Biological Macromolecules, 2001
An anticoagulant was isolated from a marine green alga, Codium cylindricum. The anticoagulant was composed mainly of galactose with a small amount of glucose, and was highly sulfated (13.1% as SO3Na). The anticoagulant properties of the purified anticoagulant were compared with that of heparin by assays of activated partial thromboplastin time (APTT ...
Tony Bacic +2 more
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An anticoagulant was isolated from a marine green alga, Codium cylindricum. The anticoagulant was composed mainly of galactose with a small amount of glucose, and was highly sulfated (13.1% as SO3Na). The anticoagulant properties of the purified anticoagulant were compared with that of heparin by assays of activated partial thromboplastin time (APTT ...
Tony Bacic +2 more
exaly +3 more sources
Fish and Shellfish ImmunologyBimetallic (Au/Ag) nanoparticles (BNPs) have shown enhanced antibacterial activity compared to their monometallic counterparts. Sulfated galactans (SG) are a naturally occurring polymer commonly found in red seaweed Gracilaria fisheri. They are biocompatible and biodegradable and environmentally friendly.
Manoj Tukaram Kamble +2 more
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The galactan sulfate from the edible, red alga Porphyra columbina
Carbohydrate Research, 1981Abstract A galactan sulfate has been isolated from the seaweed Porphyra columbina , and its structure established by a combination of methylation, methanolysis, treatment with alkali followed by methylation, and 13 C-n.m.r. spectroscopy. The polysaccharide belongs to the porphyran class, and consists of 3-linked β- d -galactosyl residues and 4 ...
Donald J. Brasch +3 more
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The Immunologic Response of Rabbits to Carrageenans, Sulfated Galactans Extracted from Marine Algae
The Journal of Immunology, 1968Summary Both κ and λ carrageenans, sulfated galactans, elicit formation of precipitating antibodies in rabbits. The carrageenan-anti-carrageenan system follows the kinetics of other well-known antipolysaccharide systems. Both λ and κ carrageenan show a high degree of immunologic specificity; namely, no reaction was observed between ...
K H, Johnston, E L, McCandless
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Carbohydrate Research, 2004
A desulfation method using chlorotrimethylsilane for treatment of pyridinium salts of sulfated galactans was developed. It proved to be appropriate for desulfation of polysaccharides of both agar and carrageenan families. In order to evaluate its efficiency in presence of the maximum content of 3,6-anhydrogalactose, it was applied to commercial kappa ...
Adriana A, Kolender +1 more
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A desulfation method using chlorotrimethylsilane for treatment of pyridinium salts of sulfated galactans was developed. It proved to be appropriate for desulfation of polysaccharides of both agar and carrageenan families. In order to evaluate its efficiency in presence of the maximum content of 3,6-anhydrogalactose, it was applied to commercial kappa ...
Adriana A, Kolender +1 more
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Effect of Sulfated Galactan from Hypnea japonica on Bone Metabolism in Rat
Canadian Journal of Physiology and Pharmacology, 1972Sulfated polysaccharide from Hypnea japonica and 45Ca was administered into growing rat by intubation or intravenous injection. 45Ca uptake and changes in the phospholipid, collagen, and mucopolysaccharide contents of the metaphyseal and diaphyseal bone were determined.
K C, Hong, R L, Cruess, S C, Skoryna
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Partial methanolysis of the agar-type sulfated galactan of the red seaweed Laurencia gemmifera
Carbohydrate Research, 1993This report describes the use of paper chromatography (PC), fast-flow liquid chromatography (FFLC) and reversed-phase high-performance liquid chromatography (RP-HPLC) for analysis of the products of mild methanolysis of the sulfated galactan of the red seaweed Laurenciu gemrnifera.
O, Valiente +3 more
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Mobility of Sulfate Ester during Structural Determinations of Red Algal Galactans
Botanica Marina, 2002The polysaccharide from Rhodophyllis membranacea (family Cystocloniaceae) was found to be approximately 80% L-carrageenan together with 20 % of a further precursor-like entity. Alkali treatment of the initial polymer gaveonly ι-carrageenan. A standard methylation of this polysaccharide in NaOH/DMSO gave 95 % of the product as permethylated β ...
I. J. Miller, J. W. Blunt
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