Results 161 to 170 of about 917 (187)
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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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Preparation of a sulfated linear (1→4)-β-d-galactan with variable degrees of sulfation
Carbohydrate Polymers, 2000A linear 1,4-β-d-galactan has been prepared by partial acid hydrolysis of the major lupin seed polysaccharide on a preparative scale. The galactan has been characterized by acetylation and methylation analysis, by GPC, as well as by its 1H- and 13C-NMR-spectra. Sulfation with increasing amounts of SO3-pyridine yielded a series of galactan sulfates with
H Vogl, D.H Paper, G Franz
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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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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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The structure of a sulfated galactan from Porphyra haitanensis and its in vivo antioxidant activity
Carbohydrate Research, 2004The sulfated galactan fraction F1 isolated from the red seaweed, Porphyra haitanensis, showed typical porphyran structure. It has a linear backbone of alternating 3-linked beta-D-galactosyl units and 4-linked alpha-L-galactosyl 6-sulfate and 3,6-anhydro-alpha-L-galactosyl units.
Quanbin, Zhang +5 more
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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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Simple separation of anticoagulant sulfated galactan from marine red algae
Journal of Applied Phycology, 2008In this study, hot water extracts of 22 red algal species were evaluated for their potential anticoagulant activities. The extracts from eight species (Grateloupia elliptica, Sinkoraena lancifolia, Halymenia dilatata, Grateloupia lanceolata, Lomentaria catenata, Martensia denticulata, Schizymenia dubyi, Chondrus crispus) showed potent activated partial
Seung-Hong Lee +3 more
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