Authors: Wasan Duangkhamchan Adisak Phomphai Ruchuon Wanna Lamul Wiset Juckamas Laohavanich Frederik Ronsse Jan G Pieters
Publish Date: 2016/10/20
Volume: 10, Issue: 2, Pages: 284-295
Abstract
Infrared IR heating method against rice weevils Sitophilus oryzae in an egg stage was investigated A kinetic model was developed to describe insect mortality in a temperature range of 40–60 °C Effects of IR heating temperature 50–60 °C and exposure time 1–3 min on insect mortality and quality attributes of the treated rice were evaluated The optimized condition obtained by means of the response surface method was used to analyze rice quality before and after IR treatment with storage The results showed that the 05thorder thermal death kinetic equation was the most suitable model and the S oryzae eggs had less heat tolerance than the adults and some other species Mortality achieved 100 after 2 min for all temperatures Both IR heating parameters significantly affected the treated milled rice qualities The minimal changes in rice quality before and after storage could be obtained using optimized temperature and exposure time of 536 °C and 12 min respectivelyThe authors thank the Faculty of Technology Mahasarakham University for financial support Thanks are also given to the Research and Researcher for Industry RRI No MSD5710045 The authors also thank Asst Prof Dr Perayot Kangkan for his advice on the 2acetyl1pyrroline analysis and Seri Rungruenag Kit Rice Mill for financial and material support
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