Title
Thermophysical and rheological properties of dulce de leche with and without coconut flakes as a function of temperature
Date Issued
01 January 2013
Access level
open access
Resource Type
research article
Author(s)
Barbosa V.C.
Coimbra J.S.d.R.
Cipriano P.d.A.
de Oliveira E.B.
Telis-Romero J.
Abstract
Dulce de leche (DL), a dairy dessert highly appreciated in Brazil, is a concentrated product containing about 70% m/m of total solids. Thermophysical and rheological properties of two industrial Brazilian Dulce de leche formulations (classic Dulce de leche and Dulce de leche added with coconut flakes 1.5% m/m) were determined at temperatures comprised between 28.4 and 76.4 °C. In general, no significant differences (p < 0.05) were observed in the presence of coconut flakes in the two formulations. Heat capacity varied from 2633.2 to 3101.8 J/kg.°C; thermal conductivity from 0.383 to 0.452 W/m.°C; specific mass from 1350.7 to 1310.7 kg/m3; and, thermal diffusivity from (1.082 × 10-7 to 1.130 × 10-7) m2/s. The Bingham model was used to properly describe the non-Newtonian behavior of both formulations, with yielding stress values varying from 27.3 to 17.6 Pa and plastic viscosity from 19.9 to 5.9 Pa.s.
Start page
93
End page
98
Volume
33
Issue
1
Language
English
OCDE Knowledge area
Alimentos y bebidas
Scopus EID
2-s2.0-84885355575
Source
Food Science and Technology
ISSN of the container
01012061
Sources of information: Directorio de Producción Científica Scopus