Gelation properties of calcium-inulin gels
Inulin is a prebiotic ingredient that is being increasingly used in food formulations as fat replacer. The present manuscript focuses on the formation of gels formed from inulin aqueous dispersions, observing the effect of inulin content, ranging from 25 to 50 wt%, and of the presence of calcium sal...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/134293 |
| Acceso en línea: | https://hdl.handle.net/11441/134293 https://doi.org/10.1016/j.foodhyd.2019.105239 |
| Access Level: | acceso abierto |
| Palabra clave: | Backscattering Calcium Gelation Inulin Rheology |
| Sumario: | Inulin is a prebiotic ingredient that is being increasingly used in food formulations as fat replacer. The present manuscript focuses on the formation of gels formed from inulin aqueous dispersions, observing the effect of inulin content, ranging from 25 to 50 wt%, and of the presence of calcium salts (chloride, lactate) at different concentrations up to 5 wt% Gels are observed to be stronger and formed in a shorter time as the polysaccharide content is higher. Both backscattering and rheological techniques can be used to follow the gelation, being able to detect a significant initial setting stage at 25 wt% inulin content. When calcium salts are added, weakening of gels takes place, resulting in lower values of the storage and loss moduli, G′ and G″, respectively, as well as in a reduction of the linear viscoelastic range. Moreover, gelation seems to be retarded on a large scale of time due to the presence of salt. Prebiotic gels containing calcium are of special interest for the development of functional foods, always considering the effect they exert on the rheology when formulating these products. |
|---|