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Open AccessCommunication
Int. J. Mol. Sci. 2016, 17(8), 1238;

Navicula sp. Sulfated Polysaccharide Gels Induced by Fe(III): Rheology and Microstructure

DICTUS, Department of Scientific and Technological Investigations, University of Sonora, Hermosillo, Sonora 83000, Mexico
CIAD, A.C., Research Center for Food and Development, Hermosillo, Sonora 83000, Mexico
UES, State University of Sonora, Navojoa, Sonora 85875, Mexico
Department of Polymers and Materials, University of Sonora, Hermosillo, Sonora 83000, Mexico
Author to whom correspondence should be addressed.
Academic Editor: Jean-Luc Audic
Received: 16 June 2016 / Revised: 14 July 2016 / Accepted: 19 July 2016 / Published: 30 July 2016
(This article belongs to the Special Issue Biodegradable Materials 2017)
Full-Text   |   PDF [1770 KB, uploaded 30 July 2016]   |  


A sulfated polysaccharide extracted from Navicula sp. presented a yield of 4.4 (% w/w dry biomass basis). Analysis of the polysaccharide using gas chromatography showed that this polysaccharide contained glucose (29%), galactose (21%), rhamnose (10%), xylose (5%) and mannose (4%). This polysaccharide presented an average molecular weight of 107 kDa. Scanning electron microscopy (SEM) micrographs showed that the lyophilized Navicula sp. polysaccharide is an amorphous solid with particles of irregular shapes and sharp angles. The polysaccharide at 1% (w/v) solution in water formed gels in the presence of 0.4% (w/v) FeCl3, showing elastic and viscous moduli of 1 and 0.7 Pa, respectively. SEM analysis performed on the lyophilized gel showed a compact pore structure, with a pore size of approximately 150 nm. Very few studies on the gelation of sulfated polysaccharides using trivalent ions exist in the literature, and, to the best of our knowledge, this study is the first to describe the gelation of sulfated polysaccharides extracted from Navicula sp. View Full-Text
Keywords: Navicula sp.; sulfated polysaccharide; gelation; trivalent ions Navicula sp.; sulfated polysaccharide; gelation; trivalent ions

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Fimbres-Olivarría, D.; López-Elías, J.A.; Carvajal-Millán, E.; Márquez-Escalante, J.A.; Martínez-Córdova, L.R.; Miranda-Baeza, A.; Enríquez-Ocaña, F.; Valdéz-Holguín, J.E.; Brown-Bojórquez, F. Navicula sp. Sulfated Polysaccharide Gels Induced by Fe(III): Rheology and Microstructure. Int. J. Mol. Sci. 2016, 17, 1238.

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