| Related citation: | Zhiqiang Wang,Lixin Chen,Saiwei Ge,Wei Xiao,Zhuohao Xuan,Pengcheng Zhang.Transmission Characteristics of Biological Pollutant on Cold Surface Through Surface Contact During Cold Storage[J].Journal of Harbin Institute Of Technology(New Series),2026,33(1):20-32.DOI:10.11916/j.issn.1005-9113.2025004. |
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| Transmission Characteristics of Biological Pollutant on Cold Surface Through Surface Contact During Cold Storage |
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| Author Name | Affiliation | | Zhiqiang Wang | 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, China | | Lixin Chen | 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, China | | Saiwei Ge | 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, China | | Wei Xiao | 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, China | | Zhuohao Xuan | 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, China | | Pengcheng Zhang | Tianjin 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 |
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| Abstract: |
| 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/cm2), 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. |
| Key words: cold chain biological pollutant surface contact transfer rate transmission characteristics |
| DOI：10.11916/j.issn.1005-9113.2025004 |
| Clc Number:Q93 |
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| Descriptions in Chinese: |
| 生物污染物在冷藏条件下通过表面接触在冷面上的传输特性 王志强1,2,3, 陈立新1,2,3, 葛赛威1,2,3, 肖威1,2,3, 宣卓豪1,2,3, 张鹏程1,4* 1 天津商业大学，天津市制冷技术重点实验室，天津，300134
2 天津商业大学，国际基础与工程热物理中心，天津 300134
3 天津商业大学，农业农村部农产品低碳冷链重点实验室，天津 300134
4 天津商业大学，生物技术与食品科学学院，天津 300134
摘要：冷链环境是病原微生物远距离传播的重要途径。本文探讨了微生物通过冷表面接触进行二次传播的机制。研究采用定量统计实验方法，以表面接触传播率为因变量，以大肠杆菌为指示菌，研究微生物的表面接触传播。在冷藏（5 ℃）和冷冻（-18 ℃）两种储存温度下，测量了接触压力（0.44、0.86、1.55、2.25 和 2.94 N/cm2）、接触时间（0、15、30、45 和 60 s）、接触角度（15°和 25°）和表面材料（橡胶和棉质手套）的影响。结果表明，随着温度的降低，微生物通过表面接触传播的可能性越来越小。在冷藏温度下处理物品时，接触时间对微生物的转移率影响不大。基于这些结果，本文建议在冷藏温度下处理物品时，尽量将物品平放，以减少倾斜角度。此外，如果无法避免倾斜角度，在处理贮藏物品，倾斜角度较大时应使用橡胶手套，而在倾斜角度较小时则可使用棉质手套。 关键词：冷链；生物污染物；表面接触；转移率；传输特性 |
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