Effect of the addition of hydrocolloids and aloe vera gel (Aloe barbadensis Miller) on the rheological properties of a beverage of sweet corn (Zea mays var. saccharata)
| Autor: | Karen Paola Contreras-Lozano, Héctor José Ciro-Velásquez, Carlos Julio Márquez-Cardozo |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Dyna, Vol 85, Iss 204, Pp 302-310 (2018) |
| Druh dokumentu: | article |
| ISSN: | 0012-7353 2346-2183 |
| DOI: | 10.15446/dyna.v85n204.63205 |
| Popis: | The rheological properties of food suspensions can be modified by adding hydrocolloids to improve stability. In this paper, the effect of xanthan gum (XG) (0.025-0.075 %w/w), sodium carboxymethylcellulose (CMC) (0.025-0.075 %w/w), and aloe vera gel (AV) (0.5-1.5 %w/w) on the rheological properties of a beverage formulated with sweet corn was evaluated. Rotational and oscillatory tests were performed at temperatures between 10 and 50 °C. Products formulated with hydrocolloids and AV showed a pseudoplastic flow with a consistency coefficient from 0.0036 to 0.2070 Pa.sn and a flow behavior index from 0.5 to 0.9, where the apparent viscosity decreased with the temperature. The viscoelastic behavior of the beverage was characteristic of a weak gel over a wide frequency range, wherein the storage modulus (G') predominated over the loss modulus (G"). Adding high concentrations of gum (≥0.05 %w/w) and low concentrations of AV (≤1 %w/w) were adequate to keep stability at low strain. |
| Databáze: | Directory of Open Access Journals |
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