CIDCA   05380
CENTRO DE INVESTIGACION Y DESARROLLO EN CRIOTECNOLOGIA DE ALIMENTOS
Unidad Ejecutora - UE
artículos
Título:
Effect of saccharides on glass transition temperatures of frozen and freeze dried bovine plasma protein .
Autor/es:
RODRÍGUEZ FURLÁN, L T. ,; LECOT, J.,; PÉREZ PADILLA, A., ; CAMPDERRÓS, ; ZARITZKY NOEMI
Revista:
JOURNAL OF FOOD ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 106 p. 74 - 79
ISSN:
0260-8774
Resumen:
In this
study, to preserve the integrity of plasma protein, protective agents, such as
saccharides are added to produce a glassy (vitrified) state. Differential
scanning calorimetry (DSC) was used to measure the glass transition (Tg),
crystallization temperatures (Tc) of the solid freezedried bovine plasma proteína
and the glass transition temperature (T0g ) of the protein freeze solution,
with the addition of inulin as protective agent, comparing the behavior with
glucose and sucrose. The results indicated that transition temperatures
increased with the molecular weight of the saccharide, conferring inulin a
stabilizing effect at higher storage temperature. The T0 g and the
water plasticizing effect were estimated by means of two theoretical models:
Miller/Fox and Gordon/Taylor extended for multi-component systems. The
determination of the glass transition temperatures is useful in defining a
freezedrying cycle and storage stability of plasma protein concentrates