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*
5.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
9.Trace Metal Contents in Human Hair of Korean.
Korean Journal of Preventive Medicine 1979;12(1):79-87
Analysis for 6 metals (Cd, Zn, Cu, Ni, Pb, Mn) by Atomic absorption spectrophotometer were made on hair samples of healthy 135 in urban area and 130 in rural area who have not dealt with the above metals in their daily working life. Marked variations were found. Samples of urban area contained more cadmium, copper, lead and manganese than those of rural area. No sexual difference in mean value could be observed and the amount of metals in hair did not increase with age. And no age dependency was found. There was a statistically significant correlation between the concentrations of cadmium and lead in both urban and rural people; Pb=1.50 Cd + 6.69 (r = 0.213, p<0.05) in urban area. Pb=1.44 Cd + 3.67 (r = 0.327, p<0.001) in rural area.
Absorption
;
Cadmium
;
Copper
;
Hair*
;
Humans*
;
Manganese
;
Metals
Result Analysis
Print
Save
E-mail