Abstract
The Aster glehni extract has many therapeutic and medicinal values. Therefore, it is essential to set appropriate conditions for enzyme treatment to efficiently extract A. glehni. In this study, changes in the quality of A. glehni extract depending on the concentration and time of enzyme treatment was investigated to increase its effective utilization. Compared to the control, the pH of the extract of A. glehni its soluble solid content increased with the enzyme treatment. The color of the A. glehni extract changed from green-yellow to reddish-yellow with the increase in treatment duration. The fructose and sucrose contents of the extract were the highest at 7.73% and 6.78%, respectively, in the control group without the enzyme treatment. Glucose and maltose contents were 6.91% and 4.44% in the C group (3.2% enzyme concentration and 60 min for enzyme treatment), respectively. Total polyphenol content, which shows antioxidant activity, was the highest at 7.38 mg GAE/g in the E group (1.6% of enzyme concentration and 120 min for enzyme treatment). 2,2-diphenylpicrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS) showed the highest radical scavenging activity in the C group (3.2% of enzyme concentration and 60 min for enzyme treatment). These results enable setting appropriate conditions of enzyme treatment in terms of enzyme concentration and time for the production of dry powders using A. glehni extract.
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