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Articles 1 - 11 of 11
Full-Text Articles in Medicine and Health Sciences
Environmental Health And Service Learning, Kelly Tuohig, Dale Stephenson, Dean Lillquist, Justin Bird, Stephen Adler, Mark Babitz
Environmental Health And Service Learning, Kelly Tuohig, Dale Stephenson, Dean Lillquist, Justin Bird, Stephen Adler, Mark Babitz
Dale J. Stephenson
In developing curriculum for a Salt Lake City, Utah High School's Advance Placement--Environmental Studies class, one goal was a module on air quality/air pollution. University of Utah graduate students and faculty presented on air pollution topics. Community exposure to school bus emissions was identified and students developed a study design, performed air sampling, learned to interpret results, and communicate results and recommendations to various audiences. This project emphasized health impacts, public awareness, and policy recommendations to promote change.
An Analysis Of Vdt Monitor Placement And Daily Hours Of Use For Female Bifocal Users, J. Lyon, Dean Lillquist, S. Alder, Dale Stephenson, D. Bloswick
An Analysis Of Vdt Monitor Placement And Daily Hours Of Use For Female Bifocal Users, J. Lyon, Dean Lillquist, S. Alder, Dale Stephenson, D. Bloswick
Dale J. Stephenson
A population of 72 bifocal wearers was studied to determine the relationship between VDT (video display terminal) placement for those who reported musculoskeletal pain and those who did not. The mean hours worked was 50.4 minutes (p=0.003) greater for those who reported head/neck pain versus those who did not and 48.6 minutes (p=0.004) greater for those who reported shoulder/arm pain that those who did not. There was no statistically significant difference between the means of monitor height, distance, or angle for those who reported pain symptoms versus those who did not. This study indicates that, self reported pain symptoms are …
Comparison Of Sampling Methods To Measure Exposure To Diesel Particulate Matter In An Underground Metal Mine, Dale Stephenson, T. Spear, M. Lutte
Comparison Of Sampling Methods To Measure Exposure To Diesel Particulate Matter In An Underground Metal Mine, Dale Stephenson, T. Spear, M. Lutte
Dale J. Stephenson
Diesel particulate matter (DPM) continues to be scrutinized as an adverse occupational exposure agent. Currently, the air sampling protocol approved by the U.S. Mine Safety and Health Administration (MSHA) to quantify exposure to DPM in mines designates an SKC impactor as the sample collection device and limits exposure to the total carbon faction of a DPM aerosol. Because use of this impactor requires submission of the sample to an analytical laboratory, it inherently includes a lag time before workplace exposures can be determined. Thus, mine operators who use this MSHA-approved sampling device to monitor personal DPM exposures are faced with …
Side-By-Side Comparison Of Three Sampling Methods For Aerosolized Endotoxin In A Wastewater Treatment Facility, Dale Stephenson, F. Derosso, Dean Lillquist, D. Greene, G. White
Side-By-Side Comparison Of Three Sampling Methods For Aerosolized Endotoxin In A Wastewater Treatment Facility, Dale Stephenson, F. Derosso, Dean Lillquist, D. Greene, G. White
Dale J. Stephenson
Research studies have established the occurrence of adverse health effects in individuals exposed to organic dusts and water aerosols laden with endotoxin. To determine what exposure levels cause these health effects, it is necessary to quantity airborne endotoxin. Several scientific studies have demonstrated that the quantification of detectable endotoxin is affected by differences in sampling media, analytical method, and aerosol composition, The study reported here performed side-by-side endotoxin sampling using a liquid impinger, a glass fiber filter, and a polycarbonate filter in a wastewater treatment plant. Results show levels of detected endotoxin appear to be highest with the impinger. Coefficients …
Carbon Monoxide Poisonings And Fatalities Associated With Recreational Watercraft, Dale Stephenson
Carbon Monoxide Poisonings And Fatalities Associated With Recreational Watercraft, Dale Stephenson
Dale J. Stephenson
Carbon monoxide (CO) is a colorless and odorless gas generated from the incomplete combustion of hydrocarbon-based fuels. Medical research has shown that human exposure to elevated concentrations of CO can cause serious injury or death. Of increasing concern are CO-related poisonings and fatalities associated with the use of recreational watercraft. Currently there is a lack of awareness of this health hazard among the general public. This presentation summarizes the risks and dangers recreational watercraft users may face from carbon monoxide exposure.
Evaluation And Control Of Noise And Airborne Chemical Agents, Dale Stephenson
Evaluation And Control Of Noise And Airborne Chemical Agents, Dale Stephenson
Dale J. Stephenson
This course will cover the fundamentals of evaluation and control of noise and airborne chemical agents encountered in the workplace. Topics will include basic sampling techniques, interpretation of sampling results, compliance with occupational exposure limits, and practical application of ventilation and noise control measures.
Status Of Epa’S Proposed Rule To Strengthen The Ozone Standard, Dale Stephenson
Status Of Epa’S Proposed Rule To Strengthen The Ozone Standard, Dale Stephenson
Dale J. Stephenson
On January 6, 2010 the EPA rolled out a proposal to reduce the 8-hour primary standard for tropospheric (ground level) ozone from its current level of 0.075 ppm to somewhere between 0.060 ppm and 0.070 ppm. This reduction has the potential for many US airsheds to be declared as nonattainment with the new standard (including many in the Rocky Mountain West). Such a declaration will require state regulatory agencies to initiate implementation plans to bring affected airsheds back into attainment. This presentation will summarize the current status of and reasoning for EPA’s proposed reduction to the primary ozone standard and …
Occupational Exposure To Snowmobile Emission At Yellowstone National Park, Wendy Campbell, Ryan Morris, Dale Stephenson, Terry Spear
Occupational Exposure To Snowmobile Emission At Yellowstone National Park, Wendy Campbell, Ryan Morris, Dale Stephenson, Terry Spear
Dale J. Stephenson
In recent years, regulations regarding snowmobile recreation in Yellowstone National Park have become more restrictive. New regulations limit the number of snowmobiles entering the park, restrict the engine type, and require that all riders must utilize a licensed guide. Given these regulations, it is hypothesized that occupational exposures to the combustion products from snowmobile exhaust have decreased. This research project performed occupational exposure monitoring of National Park Service Employees while working at the West Entrance to Yellowstone National Park during the 2004-2005 winter season. Products of snowmobile exhaust including carbon monoxide, nitrous oxides, volatile organic compounds, fine particulates, and noise …
The Presence Of P22 Bacteriophage In Electrocautery Aerosols, Dale Stephenson, David Allcott, Michael Koch
The Presence Of P22 Bacteriophage In Electrocautery Aerosols, Dale Stephenson, David Allcott, Michael Koch
Dale J. Stephenson
Electrosurgery units, including lasers and electrosurgical cauterizers, are commonly used for both inpatient and outpatient procedures. The generation of an aerosol plume, associated with the use of these devices, is a result of many factors including: 1) direct aspiration of blood and body fluids, 2) direct heating and vaporization of cellular fluid causing cells to explode, and 3) the carbonization of cells and cell fragments at high temperatures. Although initial studies have concluded that these plumes create only a malodorous nuisance, subsequent research suggests the presence of potential chemical and pathological hazards, including bacteria and virus. Most scientific research has …
Fatal Injuries In The United States Involving Respirators, 1984-1995, Anthony Suruda, William Milliken, Dale Stephenson, Richard Sesek
Fatal Injuries In The United States Involving Respirators, 1984-1995, Anthony Suruda, William Milliken, Dale Stephenson, Richard Sesek
Dale J. Stephenson
There is little published information concerning the epidemiology of fatal injuries involving respiratory protection. We compiled a case series from U.S. Occupational Safety and Health Administration investigation reports from 1984 through 1995. For the 12-year period there were 41 incidents resulting in 45 deaths due to asphyxiation or chemical poisoning while wearing a respirator. There were 23 deaths related to airline respirators, 17 deaths involving use of negative pressure (air purifying) respirators, and 5 deaths involving self-contained breathing apparatus. Among the 23 deaths involving airline respirators, 15 were associated with compatible connection couplings for breathable air and inert gases. Three …
Respiratory Protection, David Wallace, Tori Burns, Dale Stephenson, Dean Lillquist
Respiratory Protection, David Wallace, Tori Burns, Dale Stephenson, Dean Lillquist
Dale J. Stephenson
No abstract provided.