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http://dx.doi.org/10.11002/kjfp.2017.24.1.74

Optimization of drying conditions of Cudrania tricuspidata using response surface methodology  

Park, Jong-Jin (School of Food Science and Technology, Kyungpook National University)
Park, Dae-Hee (School of Food Science and Technology, Kyungpook National University)
Jung, Gayoung (Wellness R&D Center, Univera Inc.)
Shin, Eunju (Wellness R&D Center, Univera Inc.)
Do, Seon-Gil (Wellness R&D Center, Univera Inc.)
Lee, Wonyoung (School of Food Science and Technology, Kyungpook National University)
Publication Information
Food Science and Preservation / v.24, no.1, 2017 , pp. 74-83 More about this Journal
Abstract
This study was conducted to obtain the optimal conditions of hot air drying for Cudrania tricuspidata by response surface methodology (RSM). The independent variables were blanching time (60, 120, 240 sec), drying temperature (40, 60, $80^{\circ}C$) and drying time (12, 24, 36 h). The dependant variables were total polyphenol content (TPC), total flavonoid content (TFC), DPPH radical scavenging activity (DPPH), and color difference (${\Delta}E$). Viable cell colony was counted according to changes of blanching time. It was confirmed that microorganisms gradually decreased with increasing blanching time. From RSM results, the predicted values of TPC, TFC, DPPH, and ${\Delta}E$ were 8.62 mg GAE/g, 56.65 mg RE/g, 40.26% and 11.69, respectively. Experimental values within the optimal range (240 sec, blanching time; $60^{\circ}C$, drying temperature; 24 h, drying time) were 10.06 mg GAE/g, 49 mg RE/g, 44.99% and 10.53, respectively. The predicted values were similar to the experimental values. Comparing drying tendency according to changes of blanching time, moisture reduction was bigger in the blanched sample than that in control at $40^{\circ}C$. However, the differences between blanched and control decreased with increase of drying temperature. Viable cell gradually decreased as increasing blanching time.
Keywords
Cudrania tricuspidata; response surface methodology; optimization; drying condition; blanching;
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Times Cited By KSCI : 18  (Citation Analysis)
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