THE COLOR CHANGE KINETICS OF AMERICAN GINSENG SLICES DURING AIR IMPINGEMENT DRYING

摘要：

The color change kinetics of American ginseng slices were investigated in an air impingement dryer under different drying temperatrues (35, 45, 55, and 65oC) using the CIE Lab color parameters (L*, a*, b*) as the assessment indicators.Results indicated that all the three color parameters (L*, a*, b*) increased with the drying time during drying process.The L* value decreased with increasing the drying temperatrue.However, the a* and b* value increased with the increase of drying temperature.It indicated that decreasing the drying temperature could improve the color quality.By comparing the fitting of the zero-, first-, and first fraction-order kinetic models to the experimental data, the most suitable model was selected to describe the color change kinetics.Arrhenius equation was used to calculate the change activation energy and it were 33.874~38.550kJ/mol, 56.478 kJ/mol, and 74.033 kJ/mol for L*, a*, and b* values, respectively.

关键词： American ginseng color change kinetics drying activation energy

作者: Hong-Wei Xiao Jun-Wen Bai Wei-Wei Gao Hai Lin Xiao-Tuo Wang Zhen-Jiang Gao

作者单位: College of Engineering,China Agricultural University,P.O.Box 194,17 Qinghua Donglu,Beijing 100083,Ch Biotechnology Research Center,Chinese Academy of Medical Sciences,Beijing 100094,China Electricity Engineering,Shihezi University,Shihezi 832003,China

会议类型: 国际会议

会议名称: The 7th Asia-Pacific Drying Conference(第七届亚太地区干燥会议 ADC2011)

会议地点: 天津

会议语种:英文

页码: 1-9

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）