PM10 levels of the mineral components Si, Al, Fe, Ca, Mg and some trace metals were measured at three different sites in the urban area of Vienna (Austria). Observed trace metal concentrations varied between less than 0.1 ngm 3 (Cd) and approximately 200 ngm 3 (Zn), mineral components showed enhanced concentrations ranging from 0.01 mgm 3 (Ca) to 16.3 mgm 3 (Si). The contribution of the respect...

THEWISSEN, J. G. M., E. M. WILLIAMS, L. J. ROE, AND S. T. HUSSAIN. 2001. Skeletons of terrestrial cetaceans and the relationships of whales to artiodactyls. Nature 413:277–281. TUCKER, A. S., K. L. MATHEWS, AND P. T. SHARPE. 1998 Transformation of tooth type induced by inhibition of BMP signaling. Science 282:1136–1138. TUCKER, A. S., AND P. T. SHARPE. 1999. Molecular genetics of tooth morphoge...

Radiation-produced electrons initiate various reaction processes that are important to radiation damage to biomolecules. In this work, the site of attachment of the prehydrated electrons with methylacetoacetate (MAA, CH3-CO-CH2-CO-OCH3) at 77 K and subsequent reactions of the anion radical (CH3-CO•-CH2-CO-OCH3) in the temperature range (77 to ca. 170 K) have been investigated in homogeneous H2O...

References 1. Ruzicka BB, Jhamandas KH. Excitatory amino acid action on the release of brain neurotransmitters and neuromodulators: biochemical studies. Prog Neurobiol 1993;40:223–47. 2. Roettger VR, Goldfinger MD. Evidence for amino acid concentration gradients between CSF and extracellular fluid. Neurosci Lett 1994;178:197– 200. 3. Olney JW. Excitatory amino acids and neuropsychiatric disorde...

While long-term exposure to air pollutants is associated with an increase in heart diseases and mortality, little information is available about the short-term effects of air pollution. This case-crossover study assessed the relationship of particulate matter (PM10) and carbon monoxide (CO) levels with hospital admission for acute coronary syndrome in Tehran, Islamic Republic of Iran. We interv...

The purpose of this study was to test the hypothesis that particulate matter < or = 10 microns in aerodynamic diameter (PM10) particles have the ability to generate free radical activity at their surface. We collected PM10 filters from the Edinburgh, United Kingdom, Enhanced Urban Network sampling site, removed particles from the filter, and tested their ability to cause free radical damage to ...

BACKGROUND With the rapid development of China's economy, air pollution has attracted public concern because of its harmful effects on health. METHODS The source apportioning of air pollution, the spatial distribution characteristics, and the relationship between atmospheric contamination, and the risk of exposure were explored. The in situ daily concentrations of the principal air pollutants...

BACKGROUND Radical regulations to improve air quality, including traffic control, were implemented prior to and during the 2008 Beijing Olympic Games. Consequently, ambient concentrations of nitrogen dioxide (NO2) and particular matter 10 micrometers or less (PM10), were reduced in a distinct and short window of time, which presented a natural experiment for testing the relationships between ma...

Meteorological conditions play a crucial role in ambient air pollution by affecting both directly and indirectly the emissions, transport, formation, and deposition of air pollutants. In this study, the relationships between meteorological parameters and ambient air pollutants concentrations in three megacities in China, Beijing, Shanghai, and Guangzhou were investigated. A systematic analysis ...