Enhancement of Gleditsia sinensis gum rheological properties with pressure cell treatment in semi-solid state.
Int J Biol Macromol
; 84: 254-60, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26718865
ABSTRACT
The apparent viscosity, molecular weight, and molecular weight distribution are important physical properties that determine the functional properties of galactomannan gum. Gleditsia sinensis gum (GSG) in semi-solid state was pressure cell treated over a range of temperature (30-110 °C) under nitrogen maintained at a pressure of 1.0-4.0 MPa. Physicochemical properties of GSG samples both before and after the pressure cell treatment were characterized. These include measurements of rheological properties by LVDV-III Ultra Rheometer, molecular weight and radius of gyration by light scattering, and changes in surface morphology by scanning electron microscopy. GSG had the highest apparent viscosity at a treatment temperature of 30 °C; further increase in temperature led to decrease in apparent viscosity. The apparent viscosity of GSG can be efficiently improved at room temperature and low pressure. The process of pressure cell treatment of GSG in semi-solid state could be industrialized for enhancement of rheological properties of galactomannan gum.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reologia
/
Gleditsia
/
Gomas Vegetais
/
Fenômenos Mecânicos
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
China