Thin Layer Drying and Quality Characteristics of Ainsliaea acerifolia Sch. Bip. Using Far Infrared Radiation

원적외선을 이용한 단풍취의 박층 건조 및 품질 특성

  • Ning, Xiao Feng (Dept. of Agricultural Mechanization Engineering, Shenyang Agricultural University) ;
  • Li, He (Dept. of Mechatronics Engineering, Henan Agricultural University) ;
  • Kang, Tae Hwan (Major in Bio-Industry Mechanical Engineering, Kongju National University) ;
  • Lee, Jun Soo (Dept. of Food Science & Technology, Chungbuk National University) ;
  • Lee, Jeong Hyun (Dept. of Biosystems Engineering, Chungbuk National University) ;
  • Ha, Chung Su (Dept. of Biosystems Engineering, Chungbuk National University)
  • 녕효봉 (선양농업대학교 농업기계학과) ;
  • 리혁 (하남농업대학교 메카트로닉스공학과) ;
  • 강태환 (공주대학교 생물생산기계공학전공) ;
  • 이준수 (충북대학교 식품공학과) ;
  • 이정현 (충북대학교 바이오시스템공학과) ;
  • 한충수 (충북대학교 바이오시스템공학과)
  • Received : 2014.04.07
  • Accepted : 2014.06.05
  • Published : 2014.06.30


The purpose of this study was to investigate the drying characteristics and drying models of Ainsliaea acerifolia Sch. Bip. using far-infrared thin layer drying. Far-infrared thin layer drying test on Ainsliaea acerifolia Sch. Bip. was conducted at two air velocities of 0.6 and 0.8 m/sec, as well as three drying temperatures of 40, 45, and $50^{\circ}C$ respectively. The drying models were estimated using coefficient of determination and root mean square error. Drying characteristics were analyzed based on factors such as drying rate, leaf color changes, antioxidant activity, and contents of polyphenolics and flavonoids. The results revealed that increases in drying temperature and air velocity caused a reduction in drying time. The Thompson model was considered suitable for thin layer drying using far-infrared radiation for Ainsliaea accerifolia Sch. Bip. Greenness and yellowness values decreased and lightness values increased after far-infrared thin layer drying, and the color difference (${\Delta}E$) values at $40^{\circ}C$ were higher than those at $45^{\circ}C$ and $50^{\circ}C$. The antioxidant properties of Ainsliaea acerifolia Sch. Bip. decreased under all far-infrared thin layer drying conditions, and the highest polyphenolic content (37.9 mg/g), flavonoid content (22.7 mg/g), DPPH radical scavenging activity (32.5), and ABTS radical scavenging activity (31.1) were observed at a drying temperature of $40^{\circ}C$ with an air velocity of 0.8 m/sec.


Supported by : 충북대학교


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