| Full text | |
| Author(s): |
Tapia-Blácido, Delia Rita
[1]
;
Sobral, P. J.
;
Menegalli, Florencia Cecilia
Total Authors: 3
|
| Affiliation: | [1] Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia de Alimentos. Departamento de Engenharia de Alimentos - Brasil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Chemical Engineering; v. 22, n. 2, p. 249-256, Apr.-Jun. 2005. |
| Field of knowledge: | Agronomical Sciences - Food Science and Technology |
| Abstract | |
Biofilms are made of biopolymers. In the casting technique, biofilms are obtained by the drying of a polymer suspension in the final stage of processing. The aim of the present paper was to analyze the effect of this drying process on the mechanical properties of films produced with amaranth flour. Variables considered include glycerol content (30, 35 and 40%, g/g dry flour) and air-drying conditions (air temperatures of 30, 40 and 50ºC and relative humidities of 40, 55 and 70%). As amaranth flour films constitute a complex mixture of amylopectin and amylose as well as native protein and lipid, certain unexpected results were obtained. The toughest films were obtained at the lowest temperature and the lowest relative humidity (30ºC, 40%). (AU) | |