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《Transactions of The Chinese Society of Agricultural Engineering》 2003-04
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Preliminary study on technology of disinfection and preservation by photocalysis using nanometer TiO_2 and flashlight

Ye Shengying, Liu Shile, He Mingshu (College of Food Science,South China Agricultural University, Guangzhou 510642, China)  
On the basis of the higher photocalysis characteristics of nanometer TiO 2, the technology of disinfecting and keeping fruit fresh by photocalysis using nanometer TiO 2 and flashlight was probed. The effect of the dosage of nanometer TiO 2, the times of flashlight, the distance between flashlight source and the target object and the original concentration of bacteria on disinfecting the bacteria(Bacillus Subtilis, Escherichiacoli) was studied by means of L 16 (4 5) orthogonal experiments. The experiment of keeping longan fresh by the photocalysis was also done. The results show that the photocalysis using nanometer TiO 2 and flashlight is effective for disinfecting the bacteria and extending longan shelf life. The optimal result was obtained: a)for disinfecting the bacteria, the dosage of TiO 2 is 4.0×10 -4 g/mL and the flashlight times is 30; b)for extending longan shelf life, the times of flashlight is 10,the distance between flashlight and the target object is 8 cm, the added amount of TiO 2 to plastic film is 1.3×10 -4 ~1.5×10 -4 g/cm 2.
【Fund】: 广东省科技计划项目 (B2 0 2 )
【CateGory Index】: TS205.9
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