Predicted trends in retinal damage thresholds for pulse durations shorter than 50 fs and implications to maximum permissible exposure levels

2005 ◽  
Author(s):  
Benjamin A. Rockwell ◽  
Gavin D. Buffington ◽  
Michael L. Edwards ◽  
J. Steven Rosenboom ◽  
Robert J. Thomas
Keyword(s):  
Retinal Damage ◽  
Exposure Levels ◽  
Maximum Permissible Exposure

83. The Characteristic Changes in Exposure Levels in Chloroprene Monomer and Polymer Production

2005 ◽  
Author(s):  
N. Esmen ◽  
T. Hall ◽  
M. Phillips ◽  
P. Jones ◽  
H. Basara ◽  
...  
Keyword(s):  
Exposure Levels

270. Exposure Levels and Determinants of Flour Dust Exposure in Bakeries

1999 ◽  
Author(s):  
I. Burstyn ◽  
K. Teschke ◽  
K. Bartlett ◽  
S. Kennedy
Keyword(s):  
Dust Exposure ◽  
Exposure Levels ◽  
Flour Dust

Risk and Regulation: Methylmercury Exposure and Fish Consumption

2010 ◽  
Vol 6 ◽  
Author(s):  
Jonathan M Gendzier
Keyword(s):  
Environmental Protection Agency ◽  
Fish Consumption ◽  
Government Regulation ◽  
Mercury Emissions ◽  
Methylmercury Exposure ◽  
Exposure Levels ◽  
Aquatic Food ◽  
Reference Doses ◽  
Fish And Shellfish ◽  
Global Cycle

Exposure to organic mercury (methylmercury) occurs almost universally due to ingestion via contaminated fish and shellfish tissue. Ultimate sources of mercury consist of air release by domestic industrial combustion, mining, and international mercury emissions transported via a global cycle. Deposition of mercury from air to surface waters results in methylation to organic methylmercury and bioaccumulation in the aquatic food web. Health effects from methylmercury exposure consist mainly of neurological and neurodevelopmental effects, with fetuses particularly sensitive. Thus regulation of methylmercury exposure has concentrated on acceptable exposure levels and reference doses aimed toward protecting developing fetuses. The risk of methylmercury exposure in humans is regulated largely by the federal government, especially by the Environmental Protection Agency (EPA) and the Food and Drug Administration (FDA). The EPA imposes limits on mercury emissions and seeks to research methylmercury levels in fish and humans. The EPA sets a reference dose for methylmercury exposure. The FDA conducts uses date on methylmercury levels in fish to advise consumers on how to make informed decisions regarding fish consumption. There are numerous shortcoming to government regulation of this issue. Further scientific research, improved implementation of available data and scientific conclusions, and improved public communication of risk would all lead to more effective treatment of the risk of methylmercury exposure via ingestion of fish and shellfish. This could include more effective monitoring systems of human and fish methylmercury levels, research into the process of bioaccumulation, and implementation of stricter fish labeling standards, as well as research into higher-risk subpopulations allowing for targeted standards and recommendations.

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