Climate-relevant properties of diesel particulate emissions: results from a piggyback study in Bangkok, Thailand.

A "piggyback" approach is used to characterize aerosol emissions to obtain input for large-scale models of atmospheric transport. Particulate and gaseous emissions from diesel trucks, light-duty vehicles, and buses were measured by the Bangkok Pollution Control Department as part of the Developing Integrated Emissions Strategies for Existing Land Transport (DIESEL) project. We added filter-based measurements of carbonaceous composition, particulate light absorption, and water uptake.

Quantifying the emission benefits of opacity testing and repair of heavy-duty diesel vehicles.

The objective of this study was to begin to quantify the benefits of a smoke opacity-based (SAE J1667 test) inspection and maintenance program. Twenty-six vehicles exhibiting visible smoke emissions were recruited: 14 pre-1991 vehicles and 12 1991 and later model year vehicles. Smoke opacity and regulated pollutant emissions via chassis dynamometer were measured, with testing conducted at 1609 m above sea level.

Intraoperative scintigraphic localization of a gastrointestinal bleeding site.

We present a case report of intraoperative scintigraphic localization of an active gastrointestinal bleeding site in a 65-yr-old female who had repeatedly negative endoscopy and angiography.