1.Manganese exposure in ore crushing.
Chung Yill PARK ; Young Man ROH ; Jung Wan KOO ; Seung Han LEE
Korean Journal of Occupational and Environmental Medicine 1991;3(1):111-118
No abstract available.
Manganese*
2.A Study on the Manganese Exposure and Health Hazard among Manganese Manufacturing Woman Workers.
Hyun Sul LIM ; Ji Yong KIM ; Hae Kwan CHEONG ; Hoe Kyung CHEONG
Korean Journal of Preventive Medicine 1995;28(2):406-420
No abstract available.
Female
;
Humans
;
Manganese*
3.Hepatic Encephalopathy and Manganese Brain Neurotoxicity: MR Features.
The Korean Journal of Hepatology 2000;6(1):3-5
No abstract available.
Brain*
;
Hepatic Encephalopathy*
;
Manganese*
7.Characterization of Total and Size-Fractionated Manganese Exposure by Work Area in a Shipbuilding Yard.
Jee Yeon JEONG ; Jong Su PARK ; Pan Gyi KIM
Safety and Health at Work 2016;7(2):150-155
BACKGROUND: Shipbuilding involves intensive welding activities, and welders are exposed to a variety of metal fumes, including manganese, that may be associated with neurological impairments. This study aimed to characterize total and size-fractionated manganese exposure resulting from welding operations in shipbuilding work areas. METHODS: In this study, we characterized manganese-containing particulates with an emphasis on total mass (n = 86, closed-face 37-mm cassette samplers) and particle size-selective mass concentrations (n = 86, 8-stage cascade impactor samplers), particle size distributions, and a comparison of exposure levels determined using personal cassette and impactor samplers. RESULTS: Our results suggest that 67.4% of all samples were above the current American Conference of Governmental Industrial Hygienists manganese threshold limit value of 100 μg/m3 as inhalable mass. Furthermore, most of the particles containing manganese in the welding process were of the size of respirable particulates, and 90.7% of all samples exceeded the American Conference of Governmental Industrial Hygienists threshold limit value of 20 μg/m3 for respirable manganese. CONCLUSION: The concentrations measured with the two sampler types (cassette: total mass; impactor: inhalable mass) were significantly correlated (r = 0.964, p < 0.001), but the total concentration obtained using cassette samplers was lower than the inhalable concentration of impactor samplers.
Humans
;
Manganese*
;
Particle Size
;
Welding
Result Analysis
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