On a community basis, urban soil contains a potentially large reservoir of accumulated lead. This study was undertaken to explore the temporal relationship between pediatric blood lead (BPb), weather, soil moisture, and dust in Indianapolis, Indiana; Syracuse, New York; and New Orleans, Louisiana. The Indianapolis, Syracuse, and New Orleans pediatric BPb data were obtained from databases of 15,...

as surfactants enhance the membrane transport of organic compounds, it has to be assumed that they decisively influence the absorption of pollutants from house dust. sampling sites for the surfactant analysis include housing areas, each location of which has different surroundings such as rural, urban, construction, and industrial area. three stations had been selected for each housing area and...

the aim of this study is to determine the area affected by dust storms in different wind speeds using satelliteimages. in the first step, windy conditions of the sistan plain were analyzed using wind statistics data. next, fivestormy days of zabol city, indicating different wind speeds and horizontal visibilities during those storms, wereselected. then, high temporal resolution modis data was u...

BACKGROUND Dust accumulation on surfaces of critical instruments has been a major concern during lunar and Mars missions. Operation of instruments such as solar panels, chromatic calibration targets, as well as Extra Vehicular Activity (EVA) suits has been severely compromised in the past as a result of dust accumulation and adhesion. Wind storms with wind speeds of up to 70 mph have not been e...

of Science Topic: The ambient plasma environment and solar UV at the Moon cause the regolith on the lunar surface to become electrically charged [1–3]. This can result in the electrostatic transport of charged dust (< 10 μm) in the lunar exosphere, which has been observed to reach altitudes >100 km [4–6] and speeds of up to 1 km/s [7]. Value of Science Topic: From the Apollo era it is known tha...

Dust-electron plasma, consisting of nano-sized particles and electrons emitted by them, is studied. It demonstrated that the particle charge can be suitably divided into two parts: own for each ``visible'' common neutralized background with assumption almost uniform spatial distribution electrons, deviates from uniformity only near dust particles. The visible both negative positive, while total...

Introduction: The study of dust evolution in protoplanetary disks is crucial for understanding the textual, chemical and isotopic properties of chondrites. It is widely accepted that chon-drules were formed by melting of precursor dust grains in the solar nebula. Thus the typical size of chondrules would be correlated with the dust growth process. In addition, once dust grains have grown to ~ m...

The Deep Impact target comet 9P/Tempel 1 was observed by means of longslit spectroscopy from two nights before impact up to eight nights after impact, using the ESO VLT UT1, UT2, and ESO NTT telescopes. Spectra covering the complete optical wavelength range were obtained, and information at different position angles in the coma was collected. The data were used to study the gas and dust activit...

Some simplemolecules in comet comae like CO, C2, C3, CN, H2CO appear to be distributed in such a way that they are neither directly emitted from the nucleus surface nor created as daughter molecules from more complex gas phase species. The only remaining possible source is the organic component in comet dust. The requirements imposed on the comet dust grains by the distributed CO emission are t...