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http://dx.doi.org/10.9724/kfcs.2012.28.1.041

Studies on the Anti Oralmicrobial Activity and Selected Functional Component of Small Red Bean Extract  

Kang, So-Jin (Department of Food and Nutrition, Sungshin Women's University)
Han, Young-Sook (Department of Food and Nutrition, Sungshin Women's University)
Publication Information
Korean journal of food and cookery science / v.28, no.1, 2012 , pp. 41-49 More about this Journal
Abstract
This purpose of this study was to develop a tea with small red bean which have been known to have effect regarding anti-obesity, fatigue recovery, edema recovery, blood circulation, etc. In order to provide baseline data for small red bean tea we investigated the general components, antioxidative effect and proanthocyanidin analysis in small red beans[Phaseolus angularis W.F. Wight.]. Physicochemical analysis(pH, sugar content, salinity, turbidity), color, anti oralmicrobial activity, content of saponin and sensory test of small red bean with different boiling time in 8 minutes(SR1), 16 minutes(SR2), 24 minutes(SR3), 32 minutes(SR4), 40 minutes(SR5) was also measured. It was shown that the crude fat, carbohydrate, moisture, crude protein, crude ash content of small red bean were 1.0%, 63.9%, 12.8%, 18.7%, 3.6%. DPPH free radical scavenging activity, the total phenolic compounds content and flavonoid content increased significantly (p<0.001). The results of analyzed proanthocyanidin was distinguished by characteristic UV-visible spectra with absorption maximum at 320 nm($t_R$ 7.589 min). As the boiling time(8 minutes:SR1, 16 minutes:SR2, 24 minutes:SR3, 32 minutes:SR4, 40 minutes:SR5) of small red beans increaseds, the pH significantly decreased(p<0.001). The sugar content, salinity and turbidity significantly increased(p<0.001). Moreover, Hunter L, a and b values, crude saponin also increased(p<0.001). The results of analyzed activity against oral bacteria, S. mutans, S. sobrinus, P. intermedia and P. gingivalis showed a higher antibacterial activities than E. coli and S. aureus. MIC was measured that S. mutans, S. sobrinus, P. intermedia and P. gingivalis showed a lower MICs than E. coli and S. aureus. The results regarding sensory test measures, In case of color, refreshing taste and overall quality, SR3 had the highest preference overall among tested samples. In cases conceming odor and taste, SR5 had the highest preference and with regards to sweetness and saltyness, SR4 had the highest preference.
Keywords
small red bean; antibacterial activity; proanthocyanidin; saponin;
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Times Cited By KSCI : 9  (Citation Analysis)
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