|
KMID : 0903519990420030235
|
|
Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1999 Volume.42 No. 3 p.235 ~ p.239
|
|
|
Changes in Quality of Domestic Apple Juice Concentrates during Long-term Storage
|
|
김성수/Kim, Sung Soo
홍희도/김경탁/최희돈/Hong, Hee Do/Kim, Kyung Tack/Choi, Hee Don
|
|
|
Abstract
|
|
|
|
During storage of 45°Bx cloudy, 50°Bx and 72°Bx clear apple juice concentrates for 18 months, the changes in microbial counts and physicochemical properties were investigated. Little viable microbial counts were detected in 50°Bx and 72°Bx clear concentrates during all storage time and a few in 45°Bx cloudy concentrates during the only first storage stage. In all three concentrates, any changes were not found in pH and titrable acidity. But Hunter L values were decreased and a, b values were increased. Alcohol soluble color(ASC) were increased and vitamin C contents rapidly decreased, especially during the first three months. The contents and compositions of free sugars were showed a little change. It seemed that the change in ASC was more closely related with that of vitamin C contents than that of reducing sugar contents.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|