Rheological Characteristics of Fucoidan Isolated from Commercially Cultured Cladosiphon okamuranus
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M. Tako
Abstract
Rheological characteristics of fucoidan isolated from commercially cultured Cladosiphon okamuranus (Okinawamozuku) were measured with a rheogoniometer in an aqueous solution. The flow curves of the fucoidan at 25 °C showed shear-thinning behavior below 1.5% (W/V), but plastic behavior at 2.0%, the yield value of which was estimated to be 2.0 Pa. The dynamic viscoelasticity of the fucoidan increased linearly with an increase in concentration >1.0%. The dynamic viscoelasticity decreased gradually with increase in temperature. A little higher dynamic viscosity was observed than storage modulus in fucoidan solutions at various concentrations. The dynamic viscoelasticity of the fucoidan increased with addition of NaCl and CaCl2 (0.1%). The dynamic viscoelasticity of the fucoidan was stable over a wide pH range. The fucoidan isolated from commercially cultured Cladosiphon okamuranus had unique rheological characteristics in aqueous solution.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- To Gerald T. Boalch, with Our Gratitude
- Growth and Survival of the Invasive Green Alga Codium fragile ssp. tomentosoides in Tide Pools on a Rocky Shore in Nova Scotia
- Structure of the Macroalgal Community Associated with the Seagrass Halodule wrightii Ascherson in the Abrolhos Marine National Park, Brazil
- The Life History of Lophothamnion hirtum (Hook. f. et Harv.) Womersley (Rhodophyta, Ceramiaceae) from Southern New Zealand
- Gametangium-like Structures as Propagation Buds in Codium edule Silva (Bryopsidales, Chlorophyta)
- Ultrastructural Study of Zoosporogenesis in the Siphonous Green Alga Derbesia tenuissima (Chlorophyta)
- Schimmelmannia venezuelensis sp. nov. (Gloiosiphoniaceae, Rhodophyta) from Venezuela
- Fatty Acids of Species in the Genus Codium
- Rheological Characteristics of Fucoidan Isolated from Commercially Cultured Cladosiphon okamuranus
- Effects of Light, Salinity and Inorganic Nitrogen on Cell Growth and Spirolide Production in the Marine Dinoflagellate Alexandrium ostenfeldii (Paulsen) Balech et Tangen
- Morphology of Prorocentrum minimum (Dinophyceae) in the Baltic Sea and in Chesapeake Bay: Comparison of Cell Shapes and Thecal Ornamentation
- Ordinal Placement of Selected Marine Dothideomycetes Inferred from Small Subunit Ribosomal DNA Sequence Analysis
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