Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds
Prosopis ruscifolia (or vinal tree) is an abundant plant from Argentina semiarid areas, whose seeds contain a galactomannan type interesting gum: vinal gum. The aim of this work was to analyze the rheological behavior of vinal gum suspensions and the consequences of its interactions with commercial...
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0268005X_v74_n_p333_Busch |
| Aporte de: |
| id |
todo:paper_0268005X_v74_n_p333_Busch |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_0268005X_v74_n_p333_Busch2023-10-03T15:13:52Z Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds Busch, V.M. Delgado, J.F. Santagapita, P.R. Wagner, J.R. Buera, M.P. Cox merz rule Galactomannan interaction Hydrocolloid synergism Polysaccharide generalized curve Thixotropy Xanthan Prosopis ruscifolia (or vinal tree) is an abundant plant from Argentina semiarid areas, whose seeds contain a galactomannan type interesting gum: vinal gum. The aim of this work was to analyze the rheological behavior of vinal gum suspensions and the consequences of its interactions with commercial gums widely employed in the food industry. Vinal gum aqueous suspensions were in good agreement with the Cox-Merz rule at concentrations lower or equal to 1% (w/w), which establishes an empirical relationship between complex and apparent viscosity. The flow curves of vinal gum could be defined only by two parameters -Newtonian viscosity (η0) and strain rate (γ˙0.1)- and the shear-thinning behavior of vinal gum complied with the generalized curve for other polysaccharides. In mixtures with xanthan gum, vinal gum exhibited a synergistic relationship on its elastic behavior (at a total gum concentration of 1% (w/w)). On the other hand, vinal gum showed no synergism with κ-carrageenan or sodium alginate at the same total concentration of polymer. Apparent viscosity of vinal gum aqueous suspensions showed Arrhenius type dependence with temperature, as other galactomannans. The rheological behavior was not dependent on shear time, and the thickening power of vinal gum was slightly affected by pH and ionic strength changes. The present work provides detailed information on rheological characteristics of a non-traditional galactomannan extracted from an abundant and available source, being a starting point for possible applications of vinal gum as thickening and/or stabilizing agent in food, pharmaceutical, paper, textile, oil and cosmetics industries. © 2017 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0268005X_v74_n_p333_Busch |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cox merz rule Galactomannan interaction Hydrocolloid synergism Polysaccharide generalized curve Thixotropy Xanthan |
| spellingShingle |
Cox merz rule Galactomannan interaction Hydrocolloid synergism Polysaccharide generalized curve Thixotropy Xanthan Busch, V.M. Delgado, J.F. Santagapita, P.R. Wagner, J.R. Buera, M.P. Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| topic_facet |
Cox merz rule Galactomannan interaction Hydrocolloid synergism Polysaccharide generalized curve Thixotropy Xanthan |
| description |
Prosopis ruscifolia (or vinal tree) is an abundant plant from Argentina semiarid areas, whose seeds contain a galactomannan type interesting gum: vinal gum. The aim of this work was to analyze the rheological behavior of vinal gum suspensions and the consequences of its interactions with commercial gums widely employed in the food industry. Vinal gum aqueous suspensions were in good agreement with the Cox-Merz rule at concentrations lower or equal to 1% (w/w), which establishes an empirical relationship between complex and apparent viscosity. The flow curves of vinal gum could be defined only by two parameters -Newtonian viscosity (η0) and strain rate (γ˙0.1)- and the shear-thinning behavior of vinal gum complied with the generalized curve for other polysaccharides. In mixtures with xanthan gum, vinal gum exhibited a synergistic relationship on its elastic behavior (at a total gum concentration of 1% (w/w)). On the other hand, vinal gum showed no synergism with κ-carrageenan or sodium alginate at the same total concentration of polymer. Apparent viscosity of vinal gum aqueous suspensions showed Arrhenius type dependence with temperature, as other galactomannans. The rheological behavior was not dependent on shear time, and the thickening power of vinal gum was slightly affected by pH and ionic strength changes. The present work provides detailed information on rheological characteristics of a non-traditional galactomannan extracted from an abundant and available source, being a starting point for possible applications of vinal gum as thickening and/or stabilizing agent in food, pharmaceutical, paper, textile, oil and cosmetics industries. © 2017 Elsevier Ltd |
| format |
JOUR |
| author |
Busch, V.M. Delgado, J.F. Santagapita, P.R. Wagner, J.R. Buera, M.P. |
| author_facet |
Busch, V.M. Delgado, J.F. Santagapita, P.R. Wagner, J.R. Buera, M.P. |
| author_sort |
Busch, V.M. |
| title |
Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| title_short |
Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| title_full |
Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| title_fullStr |
Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| title_full_unstemmed |
Rheological characterization of vinal gum, a galactomannan extracted from Prosopis ruscifolia seeds |
| title_sort |
rheological characterization of vinal gum, a galactomannan extracted from prosopis ruscifolia seeds |
| url |
http://hdl.handle.net/20.500.12110/paper_0268005X_v74_n_p333_Busch |
| work_keys_str_mv |
AT buschvm rheologicalcharacterizationofvinalgumagalactomannanextractedfromprosopisruscifoliaseeds AT delgadojf rheologicalcharacterizationofvinalgumagalactomannanextractedfromprosopisruscifoliaseeds AT santagapitapr rheologicalcharacterizationofvinalgumagalactomannanextractedfromprosopisruscifoliaseeds AT wagnerjr rheologicalcharacterizationofvinalgumagalactomannanextractedfromprosopisruscifoliaseeds AT bueramp rheologicalcharacterizationofvinalgumagalactomannanextractedfromprosopisruscifoliaseeds |
| _version_ |
1807316206092288000 |