The variation was dependent on the chemical structure of the
hydrocolloids added. Among the four commercial hydrocolloids
tested, XG was most effective in reducing
syneresis, and reduction of retrogradation increased with
increasing concentrations of XG (0.50%40.25%). For the
other hydrocolloids, LBG was more effective in retarding
retrogradation than KGM but syneresis increased when
the addition was increased from 0.25% to 0.50%, whereas
addition of GG resulted in a negative effect by increasing
syneresis.
Analysis of retrogradation of starch gels as determined
by syneresis indicated that quick freezing rate retarded
starch retrogradation more than medium and slow freezing
rates (0.06, 0.09 and 2.30 1C/min, respectively).
Finally, the above results indicate that the best treatment
conditions for the reduction of starch retrogradation
was the addition of 0.50% XG with a freezing rate of
2.30 1C/min. Furthermore, it could retard changing of
texture in tapioca starch gel to a spongy structure during
repeated freeze–thawing.
The variation was dependent on the chemical structure of thehydrocolloids added. Among the four commercial hydrocolloidstested, XG was most effective in reducingsyneresis, and reduction of retrogradation increased withincreasing concentrations of XG (0.50%40.25%). For theother hydrocolloids, LBG was more effective in retardingretrogradation than KGM but syneresis increased whenthe addition was increased from 0.25% to 0.50%, whereasaddition of GG resulted in a negative effect by increasingsyneresis.Analysis of retrogradation of starch gels as determinedby syneresis indicated that quick freezing rate retardedstarch retrogradation more than medium and slow freezingrates (0.06, 0.09 and 2.30 1C/min, respectively).Finally, the above results indicate that the best treatmentconditions for the reduction of starch retrogradationwas the addition of 0.50% XG with a freezing rate of2.30 1C/min. Furthermore, it could retard changing oftexture in tapioca starch gel to a spongy structure duringrepeated freeze–thawing.
การแปล กรุณารอสักครู่..
