The primary purpose of this Interaction Profile for carbon monoxide, formaldehyde, methylene chloride, nitrogen dioxide, and tetrachloroethylene is to evaluate data on the toxicology of the “whole” mixture and the joint toxic action of the chemicals in the mixture in order to recommend approaches for assessing the potential hazard of this mixture to public health. To this end, the profile evalu...

The pumping of water from a sand box with a finer layer on the top was studied theoretically and experimentally. The sand box, saturated at its lower portion and initially in hydrostatic equilibrium, was pumped at constant rate. The results show that significant negative air pressure can be generated in the vadose zone during pumping. The negative air pressure increases quickly in the earlier s...

Introduction: Air pollution is now one of the greatest environmental hazards to human health in the world. The aim of this study determines the relationship between air quality and cases of myocardial infarction in Yazd. Methods: This Ecological study was performed in Yazd, Iran. In this study, all individuals who referred to emergency cases with myocardial infarction in Yazd in one year from ...

As reported in a recent Journal article, Braver et al. (1) studied head-on crashes of two passenger vehicles and estimated the risk of driver death for sled-certified air bags compared with first-generation air bags. In doing so, they extended our analysis (2) by identifying which vehicles were certified by sled tests (rather than using model year as a marker, as we did) and by including pickup...

background: national institute of environmental health sciences (niehs) scientists shows that long-term exposure to air pollutants increases the risk of respiratory diseases such as allergies, asthma, chronic obstructive pulmonary disease, and lung cancer. children and the elderly are particularly vulnerable to the health effects of ozone, fine particles, and other airborne toxicants. air pollu...

Dissolved noble gases in groundwater are used to reconstruct paleotemperature, but also yield information about "excess air", a component of dissolved gases in excess of solubility equilibrium, derived from dissolution of trapped air in the ground. A good characterization of the excess air component is necessary not only to obtain reliable noble gas temperatures, but also to investigate the pot...

ARTERIAL OXYCEN TENSIONS are reduced in the postoperative patient breathing air. This was studied by Gordh in 19581 and by Nunn and Payne in 1962 -0 and was found to occur, despite normal ventilatory volumes and arterial carbon dioxide tensions, in patients whose preoperative cardiorespiratory status was normal. The purpose of this review is to outline the physiological components and discuss t...

ii Disclaimer The statements and conclusions in this report are those of the contractor and not necessarily those of California Air Resources Board or the Advisory Panel. The mention of commercial products, their source, or their use in connection with material reported herein is not to be construed as actual or implied endorsement of such products. Acknowledgments The authors thank the followi...