INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Microencapsulation of a Low-trans Fat in Trehalose as Affected by Emulsifier Type
Autor/es:
ALVAREZ CERIMEDO MARÍA SOLEDAD; CERDEIRA MARINA; ROBERTO CANDAL; HERRERA MARÍA LIDIA
Revista:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)
Editorial:
Springer-AOCS
Referencias:
Año: 2008 p. 797 - 807
ISSN:
0003-021X
Resumen:
A low-trans fat blend formulated with high
linoleic sunflower seed oil (SFO) and a high melting fraction
(HMF) of milk fat was encapsulated by freeze-drying
emulsions. The selected emulsifiers were a mixed of the
palmitic sucrose esters (SE) P-170 and P-1670, sodium
caseinate (NaCas) or a blend of SE and NaCas. The ability to
retain the core material with time was studied by storing the
powders at different water activities (aw). Efficiency of
encapsulation was strongly dependent on emulsifier type.
NaCas formulation was more efficient retaining corematerial
during storage. The formulation with a protein and a small
surfactant had the lowest performance. The stabilizer also
influenced droplet size distribution and matrix crystallinity.
For NaCas-stabilized powder volume weighted mean diameter
(D4,3) remained small for up to 2 months of storage
(0.56 ± 0.5 lm) and then grew notably in agreement with
matrix collapse. There were no significant differences in D4,3trans fat blend formulated with high
linoleic sunflower seed oil (SFO) and a high melting fraction
(HMF) of milk fat was encapsulated by freeze-drying
emulsions. The selected emulsifiers were a mixed of the
palmitic sucrose esters (SE) P-170 and P-1670, sodium
caseinate (NaCas) or a blend of SE and NaCas. The ability to
retain the core material with time was studied by storing the
powders at different water activities (aw). Efficiency of
encapsulation was strongly dependent on emulsifier type.
NaCas formulation was more efficient retaining corematerial
during storage. The formulation with a protein and a small
surfactant had the lowest performance. The stabilizer also
influenced droplet size distribution and matrix crystallinity.
For NaCas-stabilized powder volume weighted mean diameter
(D4,3) remained small for up to 2 months of storage
(0.56 ± 0.5 lm) and then grew notably in agreement with
matrix collapse. There were no significant differences in D4,3aw). Efficiency of
encapsulation was strongly dependent on emulsifier type.
NaCas formulation was more efficient retaining corematerial
during storage. The formulation with a protein and a small
surfactant had the lowest performance. The stabilizer also
influenced droplet size distribution and matrix crystallinity.
For NaCas-stabilized powder volume weighted mean diameter
(D4,3) remained small for up to 2 months of storage
(0.56 ± 0.5 lm) and then grew notably in agreement with
matrix collapse. There were no significant differences in D4,3D4,3) remained small for up to 2 months of storage
(0.56 ± 0.5 lm) and then grew notably in agreement with
matrix collapse. There were no significant differences in D4,3± 0.5 lm) and then grew notably in agreement with
matrix collapse. There were no significant differences in D4,3D4,3
with water content. For NaCas/SE-stabilized powder, however,
D4,3 was high at the beginning (100 ± 0.5 lm) and then
decreased most likely due to particle break-up. Although
particle size distribution showed the same behavior for all4,3 was high at the beginning (100 ± 0.5 lm) and then
decreased most likely due to particle break-up. Although
particle size distribution showed the same behavior for all
aw, retention was strongly dependent on water content.
Retention with time was determined by the counteracting
effects of these factors.w, retention was strongly dependent on water content.
Retention with time was determined by the counteracting
effects of these factors.