title: New insights into xanthan synergistic interactions with konjac glucomannan: A novel interaction mechanism proposal.
abstract: The interactions of xanthans containing precise acetate and pyruvate concentration with Konjac glucomannan (KGM) were studied at different sodium chloride and polymer concentrations. A new unified model of the interaction is proposed, taking into account previous models in the literature. This study suggests that the interactions occur by two distinct mechanisms dependent on xanthan conformation. These interactions are not mutually exclusive and may co-exist and hence produce complicated traces. Consequently two types of gel which melt at different temperature ranges can be formed. Depending on the xanthan helix coil transition temperature, one or both of the synergistic states may exist in the hydrocolloid blend. The proposed model has been tested rheologically and using differential scanning calorimetry by varying salt concentration and using samples containing different functional group concentrations.
authors.affiliation: Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK. Electronic address: sbzaha@exmail.nottingham.ac.uk.
authors.forename: A
authors.initials: A
authors.lastname: Abbaszadeh
authors.affiliation: Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
authors.forename: W
authors.initials: W
authors.lastname: MacNaughtan
authors.affiliation: DuPont, Danisco France SAS, 20 rue Brunel, 75017 Paris, France.
authors.forename: G
authors.initials: G
authors.lastname: Sworn
authors.affiliation: Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
authors.forename: T J
authors.initials: TJ
authors.lastname: Foster
mesh_terms: D031056:Amorphophallus; D002152:Calorimetry, Differential Scanning; D002236:Carbohydrate Conformation; D055119:Elastic Modulus; D005782:Gels; D006863:Hydrogen-Ion Concentration; D008351:Mannans / Q000737:chemistry*; D008956:Models, Chemical; D044367:Phase Transition; D012212:Rheology; D013696:Temperature
chemical_list: D005782:Gels; D008351:Mannans
keywords: Helix; Konjac mannan; Models of interaction; Random coil; Xanthan