Transmission Characteristics of Biological Pollutant on Cold Surface Through Surface Contact During Cold StorageOA
The cold chain environment is an important route for the long⁃distance transmission of pathogenic micro⁃organisms.In this study,we explored the mechanisms of secondary propagation through surface contact on cold surfaces.A quantitative statistical experimental method was adopted to study the surface⁃contact transmission of micro⁃organisms,wherein the transfer rate of surface contact was the dependent variable and Escherichia coli was used as the indicator bacterium.The effects of contact pressure(0.44,0.86,1.55,2.25,and 2.94 N/cm^(2)),contact time(0,15,30,45,and 60 s),contact angle(15°and 25°),and surface materials(rubber and cotton gloves)were measured at two storage temperatures:cold storage(5℃)and freezing(-18℃).The results showed that as temperature decreases,the transfer of micro⁃organisms through surface contact becomes less probable.The contact time did not significantly influence the transfer rate of micro⁃organisms when items were handled at cold⁃storage temperatures.Based on these results,we recommend placing items as flat as possible to minimize the tilt angle when handling them at cold⁃storage temperatures.Additionally,if the tilt angle cannot be avoided,rubber gloves should be used when handling items stored at large tilt angles,whereas cotton gloves may be used for items placed at smaller angles.
Zhiqiang Wang;Lixin Chen;Saiwei Ge;Wei Xiao;Zhuohao Xuan;Pengcheng Zhang
Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China International Centre in Fundamental and Engineering Thermophysics,Tianjin University of Commerce,Tianjin 300134,China Key Lab of Agricultural Products Low Carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin 300134,ChinaTianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China International Centre in Fundamental and Engineering Thermophysics,Tianjin University of Commerce,Tianjin 300134,China Key Lab of Agricultural Products Low Carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin 300134,ChinaTianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China International Centre in Fundamental and Engineering Thermophysics,Tianjin University of Commerce,Tianjin 300134,China Key Lab of Agricultural Products Low Carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin 300134,ChinaTianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China International Centre in Fundamental and Engineering Thermophysics,Tianjin University of Commerce,Tianjin 300134,China Key Lab of Agricultural Products Low Carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin 300134,ChinaTianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China International Centre in Fundamental and Engineering Thermophysics,Tianjin University of Commerce,Tianjin 300134,China Key Lab of Agricultural Products Low Carbon Cold Chain of Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin 300134,ChinaTianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China School of Biotechnology and Food Science,Tianjin University of Commerce,Tianjin 300134,China
生物科学
cold chainbiological pollutantsurface contacttransfer ratetransmission characteristics
《Journal of Harbin Institute of Technology(New Series)》 2026 (1)
P.20-32,13
National Natural Science Foundation of China(Grant No.52278121).
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