Rheological and physical properties of spray-dried mucilage obtained from Hylocereus undatus cladodes
Por:
García-Cruz E.E., Rodríguez-Ramírez J., Lagunas, LLM, Medina-Torres L.
Publicada:
2 ene 2013
Resumen:
This study examines the rheological behavior of reconstituted
spray-dried mucilage isolated from the cladodes of pitahaya (Hylocereus
undatus), the effects of concentration and its relationship with
physical properties were analyzed in reconstituted solutions. Drying
process optimization was carried out through the surface response
method, utilizing a factorial 2(3) design with three central points, in
order to evaluate yield and rheological properties. The reconstituted
mucilage exhibited non-Newtonian shear-thinning behavior, which
adequately fit the Cross model (R-2 > 0.95). This dynamic response
suggests a random coil configuration. The steady-shear viscosity and
dynamic response are suitably correlated through the Cox-Merz rule,
confirming the mucilage's stability of flow. Analysis of the physical
properties of the mucilage (Tg, DTP, and particle morphology) explains
the shear-thinning behavior. (C) 2012 Elsevier Ltd. All rights reserved.
Filiaciones:
García-Cruz E.E.:
Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación Para El Desarrollo Integral Regional, Unidad Oaxaca, Hornos No. 1003, 71230 Oaxaca, Mexico
Rodríguez-Ramírez J.:
Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación Para El Desarrollo Integral Regional, Unidad Oaxaca, Hornos No. 1003, 71230 Oaxaca, Mexico
Medina-Torres L.:
Univ Autonoma Mexico UNAM, Fac Quim E, Mexico City 04510, DF, Mexico
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