3. Results and discussion
3.1. Titratable acidity,pH, Brix, cloud value and color attributes
Results regarding effect of ultrasoun d on titratable acidity,pH,
Brix, color attributes and cloud value are shown in Table 1. It is
clear from the data that there were not any significantchanges
(P > 0.05)in pH,titratable acidity and Brix of apple juice due to
the sonication treatment.Our results regarding pH and acidity of
sonicated apple juice are in accordance with observations of soni-
cated kasturi lime juice [4]. Results of our study also showed that
sonicatio n treatment did not give significanteffect on the total sol-
uble solid of apple juice in all the treatments (Table 1). It has been
reported that sonicatio n treatment cause asignificantdecrease in
Brix of kasturi lime juice [4]. However,we found non-significant
effect of sonication on the Brix of apple juice which is in agree-
ment with observation of ultrasound-tr eated apple–carrot juice
blends [17].
Our study demonst rated that sonication treatment significantly
(P < 0.05)increased the cloud value of apple juice.As mentioned in
the Table 1, this increase was from 0.0563 up to 0.0780 and 0.0957
in the treatments sonicated for 30,60 and 90 min,respectively , as
compare d to that (0.0233)of non-soni cated treatment. The
increase in cloud value might be due to high-pressu re gradient
by cavitations during sonication treatment that cause the colloidal
disintegr ation, dispersion and breakdown of macromolecul es to
3. Results and discussion3.1. Titratable acidity,pH, Brix, cloud value and color attributesResults regarding effect of ultrasoun d on titratable acidity,pH,Brix, color attributes and cloud value are shown in Table 1. It isclear from the data that there were not any significantchanges(P > 0.05)in pH,titratable acidity and Brix of apple juice due tothe sonication treatment.Our results regarding pH and acidity ofsonicated apple juice are in accordance with observations of soni-cated kasturi lime juice [4]. Results of our study also showed thatsonicatio n treatment did not give significanteffect on the total sol-uble solid of apple juice in all the treatments (Table 1). It has beenreported that sonicatio n treatment cause asignificantdecrease inBrix of kasturi lime juice [4]. However,we found non-significanteffect of sonication on the Brix of apple juice which is in agree-ment with observation of ultrasound-tr eated apple–carrot juiceblends [17].Our study demonst rated that sonication treatment significantly(P < 0.05)increased the cloud value of apple juice.As mentioned inthe Table 1, this increase was from 0.0563 up to 0.0780 and 0.0957in the treatments sonicated for 30,60 and 90 min,respectively , ascompare d to that (0.0233)of non-soni cated treatment. Theincrease in cloud value might be due to high-pressu re gradientby cavitations during sonication treatment that cause the colloidaldisintegr ation, dispersion and breakdown of macromolecul es to
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