Physical and chemical stability of gum arabic-stabilized conjugated linoleic acid oil-in-water emulsions.
J Agric Food Chem
; 61(19): 4639-45, 2013 May 15.
Article
em En
| MEDLINE
| ID: mdl-23614832
ABSTRACT
Oil-in-water (O/W) emulsions have been used as a delivery system to protect conjugated linoleic acid (CLA), a polyunsaturated fatty acid, from oxidation. Conventional gum arabic (GA) and two matured gum arabic samples (EM2 and EM10) were used as emulsifiers to prepare CLA-in-water emulsions. The emulsions have optimal physical and chemical stability at gum concentrations of 5% for all three gums. Emulsions with higher gum concentrations are more susceptible to lipid oxidation. This is attributed to reduced physical stability at higher gum concentrations because of the coalescence and depletion-induced flocculation of the emulsion droplets. The prooxidants iron and copper intrinsically contained in the gums could also contribute to this instability. Among the three gums, EM10 provides the most effective protection for CLA both physically and chemically, because of its superior interfacial properties over GA and EM2.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Ácidos Linoleicos Conjugados
/
Fenômenos Químicos
/
Goma Arábica
Idioma:
En
Revista:
J Agric Food Chem
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
China