INIQUI   05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Physicochemical characterisation of the hydrocolloid from Brea
Autor/es:
BERTUZZI, MARÍA A.; SLAVUTSKY, ANIBAL M.; ARMADA, MARGARITA
Revista:
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2012 vol. 47 p. 776 - 782
ISSN:
0950-5423
Resumen:
The Brea gum (BG) is a hydrocolloid obtained as phloematic exudate from Cercidium praecox. The exudate
was purified by solution and subsequent drying. BG showed high solubility in water 28.3% at 25 C that
increased as temperature was raised. Viscosity of BG solutions increased with BG concentration increase and
temperature decrease. Addition of acid or alkali produced changes in solution viscosity as the electrostatic
charges on the macromolecule were altered. Solution density at 25 C increased linearly with hydrocolloid
concentration up to saturation. BG lowered the surface tension of water to 51.3 mN m)1 when BG
concentration was 5%, remaining constant for higher concentrations. The diameter of oil droplets emulsified
decreased and foamability increased with BG concentration increase up to 5% of BG. BG presents adequate
functional characteristics for use as stabiliser in preparations with high content of insoluble solids and as
stabiliser and emulsifier in emulsions and foams.Cercidium praecox. The exudate
was purified by solution and subsequent drying. BG showed high solubility in water 28.3% at 25 C that
increased as temperature was raised. Viscosity of BG solutions increased with BG concentration increase and
temperature decrease. Addition of acid or alkali produced changes in solution viscosity as the electrostatic
charges on the macromolecule were altered. Solution density at 25 C increased linearly with hydrocolloid
concentration up to saturation. BG lowered the surface tension of water to 51.3 mN m)1 when BG
concentration was 5%, remaining constant for higher concentrations. The diameter of oil droplets emulsified
decreased and foamability increased with BG concentration increase up to 5% of BG. BG presents adequate
functional characteristics for use as stabiliser in preparations with high content of insoluble solids and as
stabiliser and emulsifier in emulsions and foams.)1 when BG
concentration was 5%, remaining constant for higher concentrations. The diameter of oil droplets emulsified
decreased and foamability increased with BG concentration increase up to 5% of BG. BG presents adequate
functional characteristics for use as stabiliser in preparations with high content of insoluble solids and as
stabiliser and emulsifier in emulsions and foams.