They are also in line with the few intervention studies that have investigated the impact of changing air pollution levels on children's lung function growth (Avol et al. 2001; Frye et al. 2003; Neuberger et al. 2002) and bronchial responsiveness (Wong et al. 1998) and on mortality in adults (Clancy et al. 2002; Hedley et al. 2002).
Another display illustrated the effects of changing air pressure on different materials--balloons and marshmallows inside small vacuum chambers swelled as the air pressure was reduced and the gasses within them expanded, then shrunk as the pressure returned to normal, the gas being compressed again.
On the other hand, changing air CO2 concentration, fertilisation by nitrogen deposition from air pollution by NO2, and forest management practices, can stimulate productivity of trees (Sander et al., 1995; Dünisch et al., 1996; Kim and Fukazawa, 1997).
[Page C2.] Changes Offered to Pollution Rules The administration has proposed changing air pollution rules to allow utilities to upgrade power plants without being required to improve their pollution-control equipment.
Furthermore, a bypass structure was designed to adjust the bias magnetic field by changing air gap in the lower magnetic circuit or by rotating yoke in the upper magnetic circuit.
A1 Shift in Air Pollution Rules The Bush administration proposed changing air pollution rules to give utilities more leeway in modernizing power plants without having to improve pollution-control equipment.
And I know I will continue to buy my own jewelry in the same way I learned to kill my own spiders, build my own shelves and master the fine art of changing air conditioning filters.
We identified two factors which may be responsible for the varying adhesion with changing air pressure, namely, humidity and suction.
The Bush administration today proposed changing air pollution rules to give utilities more leeway in modernizing power plants without also being required to improve their pollution-control equipment.
Changing air sac volumes in the largest and smallest models to exaggerate mass effects had less than +/−2% effect on total body mass in these models.
