Migration and Deposition Law of Pollutants in Urban Sewage Confluence Pipe Network from the Perspective of Ecology.

Aiming at the problem of pollutant migration and deposition in urban sewage confluence pipe, an experimental simulation system of sewage confluence pipe was established. The confluence conditions of three flow patterns (velocity ratio Vaccess/Vtrunk = 0.1/0.

Quantifying the Soil Arthropod Diversity in Urban Forest in Dera Ghazi Khan.

Arthropods can be either large or too small to be seen from the microscope. Their legs are jointed and perform a specific function in the soil. Several arthropods have been identified to date.

Subacute inhalation exposure of rats to 1,6-hexamethylene diisocyanate with recovery period.

In this subacute inhalation toxicity study of 1,6-hexamethylene diisocyanate (HDI), groups of 10 male and 10 female Sprague-Dawley rats were exposed to 0, 0.005, 0.0175, or 0.

Developmental toxicity of 1,6-hexamethylene diisocyanate (HDI) in the Sprague-Dawley rat.

Background: 1,6-Hexamethylene diisocyanate (HDI), a widely used chemical in commercial polyurethane manufacture, has been shown to affect the respiratory tract of experimental animals. However, its potential to affect neonatal development, particularly after inhalation exposure, is less well described. The present study was conducted to assess the developmental toxicity of HDI.

A comparative respiratory sensitization study of 2,4- and 2,6-toluene diisocyanate using guinea pigs.

The potential exposure of workers to both 2,4-toluene diisocyanate (2,4-TDI) and 2,6-TDI led to an investigation of the comparative respiratory sensitization potential of these two isomers. Separate groups of guinea pigs were either sham exposed or exposed to one of the isomers 3 h/day for 5 consecutive days (sensitization phase). The mean concentration during the sensitization phase ranged from 1.