INVESTIGADORES
HERRERA Maria Lidia
artículos
Título:
Crystallization behavior of high-oleic high-stearic sunflower oil stearins under dynamic and static conditions
Autor/es:
SILVANA MARTINI; JAIME A RINCON CARDONA; YE Y.; TAN C.Y.; ROBERTO J CANDAL; MARIA LIDIA HERRERA
Revista:
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2013 vol. 90 p. 1773 - 1786
ISSN:
0003-021X
Resumen:
Soft (SS) and hard (HS) stearins obtained from
high-oleic high-stearic sunflower oil were isothermally
crystallized under dynamic (with agitation) and static
conditions at 16, 17, 18, 19, and 20 C and 24, 25, 26, 27,
and 28 C, respectively. Both fractions crystallized under
the a-form at early stages of crystallization for all temperatures
(Tc) tested. Polymorphic behavior strongly
changed with Tc and shear conditions for both fractions. SS
fractions were characterized by a, b2 and/or b1 polymorphs
at lower Tc and b1 crystals at higher Tc when crystallized
under dynamic conditions, while this same fat system was
characterized by b2 crystals at lower Tc and b2 at higher Tc
under static conditions. HS samples were mainly characterized
by a and b2 crystals at lower Tc and a and b1
crystals at higher Tc when crystallized under dynamic
conditions; while the same fat was characterized by b1
crystals when crystallized at lower Tc and a when crystallized
at higher Tc under static conditions after 90 min at
Tc. These different polymorphic behaviors, in combination
with the different processing and tempering temperatures
are translated in specific textural behavior of the samples.