Cyanoflan: A cyanobacterial sulfated carbohydrate polymer with emulsifying properties

authors	Mota, R; Vidal, R; Pandeirada, C; Flores, C; Adessi, A; De Philippis, R; Nunes, C; Coimbra, MA; Tamagnini, P
nationality	International
journal	CARBOHYDRATE POLYMERS
author keywords	Cyanobacteria; Cyanoflan; Cyanothece; Emulsification; Extracellular carbohydrate polymer
keywords	EXTRACELLULAR POLYSACCHARIDES; EXOCELLULAR POLYSACCHARIDES; PHORMIDIUM J-1; MARINE; EXOPOLYSACCHARIDES; BIOSYNTHESIS; SUBSTANCE
abstract	The extracellular polysaccharides produced by cyanobacteria have distinctive characteristics that make them promising for applications ranging from bioremediation to biomedicine. In this study, a sulfated polysaccharide produced by a marine cyanobacterial strain and named cyanoflan was characterized in terms of morphology, chemical composition, and rheological and emulsifying properties. Cyanoflan has a 71 % carbohydrate content, with 11 % of sulfated residues, while the protein account for 4 % of dry weight. The glycosidic-substitution analysis revealed a highly branched complex chemical structure with a large number of sugar residues. The cyanoflan high molecular mass fractions (above 1 MDa) and entangled structure is consistent with its high apparent viscosity in aqueous solutions and high emulsifying activity. It showed to be a typical non-Newtonian fluid with pseudoplastic behavior. Altogether, these results confirm that cyanoflan is a versatile carbohydrate polymer that can be used in different biotechnological applications, such as emulsifying/thickening agent in food or cosmetic industries.
publisher	ELSEVIER SCI LTD
issn	0144-8617
isbn	1879-1344
year published	2020
volume	229
digital object identifier (doi)	10.1016/j.carbpol.2019.115525
web of science category	Chemistry, Applied; Chemistry, Organic; Polymer Science
subject category	Chemistry; Polymer Science
unique article identifier	WOS:000501796600038