Associative phenomena in galactomannan-deacetylated xanthan systems

Goycoolea Valencia, Francisco Martín; Milas, Michel; Rinaudo, Marguerite

Publication:
Associative phenomena in galactomannan-deacetylated xanthan systems

dc.contributor.author	Goycoolea Valencia, Francisco Martín
dc.contributor.author	Milas, Michel
dc.contributor.author	Rinaudo, Marguerite
dc.contributor.department	Biología Celular e Histología
dc.date.accessioned	2025-01-29T07:37:24Z
dc.date.available	2025-01-29T07:37:24Z
dc.date.issued	2001-09-30
dc.description	© 2001 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Accepted Manuscript version of a Published Work that appeared in final form in International Journal of Biological Macromolecules. To access the final edited and published work see https://doi.org/10.1016/S0141-8130(01)00164-7
dc.description.abstract	The interaction between mesquite seed galactomannan (MSG; D-mannose to D-galactose ratio (M/G) ~1.1) and deacetylated xanthan (DX) in 5 mM NaCl leading to synergistic gel formation at 25 °C was investigated and compared with the far more studied system made of xanthan and locust bean gum (LBG; M/G ~3.5). Rheology and differential scanning calorimetry were used to measure temperatures of gel formation and transition enthalpy as a function of polymer composition, while circular dichroism was used to probe the conformation of DX in the LBG– DX system. MSG and DX associate at 25 °C with a well defined stoichiometry of 0.6:1.0 (w/w) at low ionic strength favouring the disordered coil state of DX. When LBG was used in place of MSG in water or 5 mM NaCl, two types of mechanisms of interpolymeric association are envisaged.	es
dc.format	application/pdf	es
dc.format.extent	12	es
dc.identifier.citation	International Journal of Biological Macromolecules, 2001, Vol. 29 (3), pp. 181-192
dc.identifier.doi	https://doi.org/10.1016/S0141-8130(01)00164-7
dc.identifier.issn	Print: 0141-8130
dc.identifier.issn	Electronic: 1879-0003
dc.identifier.uri	http://hdl.handle.net/10201/149563
dc.language	eng	es
dc.publisher	Elsevier
dc.relation	We are grateful to Consejo Nacional de Ciencia y Tecnologia (CONACyT, Mexico) and Centre National de la Recherche Scientifique (CNRS, France) for an international co-operation grant to carry out these investigations.	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0141813001001647?via%3Dihub
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject	Deacetylated xanthan	es
dc.subject	Mesquite seed galactomannan
dc.subject	Locust bean gum
dc.subject	Associative interactions
dc.subject	Gelation
dc.subject.other	CDU::5 - Ciencias puras y naturales::54 - Química::544 - Química física	es
dc.title	Associative phenomena in galactomannan-deacetylated xanthan systems	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es