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Occupational Heat Stress Impacts on Health and Productivity in a Steel Industry in Southern India
Krishnamurthy, Manikandan,Ramalingam, Paramesh,Perumal, Kumaravel,Kamalakannan, Latha Perumal,Chinnadurai, Jeremiah,Shanmugam, Rekha,Srinivasan, Krishnan,Venugopal, Vidhya Occupational Safety and Health Research Institute 2017 Safety and health at work Vol.8 No.1
Background: Workers laboring in steel industries in tropical settings with high ambient temperatures are subjected to thermally stressful environments that can create well-known risks of heat-related illnesses and limit workers' productivity. Methods: A cross-sectional study undertaken in a steel industry in a city nicknamed "Steel City" in Southern India assessed thermal stress by wet bulb globe temperature (WBGT) and level of dehydration from urine color and urine specific gravity. A structured questionnaire captured self-reported heat-related health symptoms of workers. Results: Some 90% WBGT measurements were higher than recommended threshold limit values ($27.2-41.7^{\circ}C$) for heavy and moderate workloads and radiational heat from processes were very high in blooming-mill/coke-oven ($67.6^{\circ}C$ globe temperature). Widespread heat-related health concerns were prevalent among workers, including excessive sweating, fatigue, and tiredness reported by 50% workers. Productivity loss was significantly reported high in workers with direct heat exposures compared to those with indirect heat exposures ($x^2=26.1258$, degrees of freedom = 1, p < 0.001). Change in urine color was 7.4 times higher among workers exposed to WBGTs above threshold limit values (TLVs). Conclusion: Preliminary evidence shows that high heat exposures and heavy workload adversely affect the workers' health and reduce their work capacities. Health and productivity risks in developing tropical country work settings can be further aggravated by the predicted temperature rise due to climate change, without appropriate interventions. Apart from industries enhancing welfare facilities and designing control interventions, further physiological studies with a seasonal approach and interventional studies are needed to strengthen evidence for developing comprehensive policies to protect workers employed in high heat industries.
Occupational Heat Stress Impacts on Health and Productivity in a Steel Industry in Southern India
Manikandan Krishnamurthy,Paramesh Ramalingam,Kumaravel Perumal,Latha Perumal Kamalakannan,Jeremiah Chinnadurai,Rekha Shanmugam,Krishnan Srinivasan,Vidhya Venugopal 한국산업안전보건공단 산업안전보건연구원 2017 Safety and health at work Vol.8 No.1
Background: Workers laboring in steel industries in tropical settings with high ambient temperatures are subjected to thermally stressful environments that can create well-known risks of heat-related illnesses and limit workers’ productivity. Methods: A cross-sectional study undertaken in a steel industry in a city nicknamed “Steel City” in Southern India assessed thermal stress by wet bulb globe temperature (WBGT) and level of dehydration from urine color and urine specific gravity. A structured questionnaire captured self-reported heatrelated health symptoms of workers. Results: Some 90% WBGT measurements were higher than recommended threshold limit values (27.2 e41.7C) for heavy and moderate workloads and radiational heat from processes were very high in blooming-mill/coke-oven (67.6C globe temperature). Widespread heat-related health concerns were prevalent among workers, including excessive sweating, fatigue, and tiredness reported by 50% workers. Productivity loss was significantly reported high in workers with direct heat exposures compared to those with indirect heat exposures (c2 ¼ 26.1258, degrees of freedom ¼ 1, p < 0.001). Change in urine color was 7.4 times higher among workers exposed to WBGTs above threshold limit values (TLVs). Conclusion: Preliminary evidence shows that high heat exposures and heavy workload adversely affect the workers’ health and reduce their work capacities. Health and productivity risks in developing tropical country work settings can be further aggravated by the predicted temperature rise due to climate change, without appropriate interventions. Apart from industries enhancing welfare facilities and designing control interventions, further physiological studies with a seasonal approach and interventional studies are needed to strengthen evidence for developing comprehensive policies to protect workers employed in high heat industries.
Narayanasamy Mathivanan,Gangadharan Surendiran,Krishnamurthy Srinivasan,Kannan Malarvizhi 한국식품영양과학회 2006 Journal of medicinal food Vol.9 No.4
This study investigated the wound healing properties of the chloroform extract of Morinda pubescensfruit inrats. Topical application of M. pubescensfruit extract at 20 mg/mL and 10 mg/mL concentrations appreciably acceleratedwound healing in rats compared with controls. Complete wound contraction was achieved, and fresh hair began to grow inthe entire wounded area within 15 days in animals treated with the 20 mg/mL chloroform fruit extract of M. pubescenscom-pared with only 60% contraction without hair growth in control rats.