Ozone & Oxidants

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Research Report 11
David A Johnson
August 1987

Addressing the need for better assessment of human exposure to mobile source emissions, this report investigates proteinase inhibitor activity as a potential biomarker of oxidant exposure. In this study by Dr. Johnson, human participants were exposed to 0.5 ppm ozone for four hours on consecutive days and to concentrations ranging from 0.6-2 ppm nitrogen dioxide for three hours. Blood samples were obtained and the functional activity of the proteinase inhibitors, alpha-1-proteinase, and bronchial leukocyte proteinase was assessed.

Research Report 6
Deborah M Drechsler-Parks
April 1987

Dr. Drechsler-Parks and colleagues at the Institute of Environmental Stress sought to examine the effects of nitrogen dioxide, ozone, and peroxyacetyl nitrate on metabolic and pulmonary function. Because it is possible that two or more pollutants could interact in ambient air and cause effects that could not be predicted from the effects observed with the individual pollutants, the investigators examined varying levels of different pollutants in 32 non-smoking men and women (8 men and 8 women 18-26 years of age and 8 men and 8 women 51-76 years of age).

Research Report 1
Marie A Amoruso
August 1985

Acute hemolytic anemia is associated with a deficiency in glucose 6-phosphate dehydrogenase (G6PD), an X-linked inheritable characteristic. Hemolytic anemia is thought to be caused by a depletion of glutathione and other reducing compounds in red blood cells. Dr. Amoruso and colleagues sought to experimentally test the Calabrese hypothesis, which suggests that G6PD-deficient individuals may be at an increased risk of hemolysis during exposure to low levels of oxidants such as ozone.