INVESTIGATION ON THE INFLUENCE OF PRE-TREATMENTS ON DRYING BEHAVIOUR OF BROCCOLI BY MRI EXPERIMENTS

摘要：

Magnetic Resonance Imaging (MRI) allows the monitoring of internal moisture content of food products during drying non-destructively.In an experimental set-up with continuous and controlled hot air supply, the internal moisture distribution of broccoli with different pre-treatments are measured during drying.Moisture distribution, drying rate and shrinkage are compared and analyzed quantitatively.MRI results indicated that for fresh broccoli stalks the moisture content in the core of the sample increased after some hours of drying.With pre-treatments as peeling, blanching or freezing the moisture transport barrier in the skin of the broccoli sample was reduced.Shrinkage was uniform for most of the pre-treated samples and the moisture increment in the core did not occur.It was also found that with these pre-treatments progress of drying enhanced significantly.Therefore, from an drying efficiency and economic point of view, pre-treatments prior to drying offer important opportunities.

关键词： MRI hot air drying broccoli stalk increased moisture content pre-treatments

作者: X.Jin R.G.M.van der Sman E.Gerkema F.J.Vergeldt H.van As G.van Straten R.M.Boom A.J.B.van Boxtel

作者单位: Systems and Control Group,Wageningen University,P.O.Box 17,6700AA,Wageningen,The Netherlands. Food Process Engineering Group,Wageningen University Laboratory for Biophysics,Wageningen University

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: 1-5

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）