Time-period mortality patterns in a Gaseous Diffusion Plant workforce

Time-period mortality patterns in a Gaseous Diffusion Plant workforce.

BACKGROUND We sub-divided a cohort of 6820 workers at the Paducah (KY) Gaseous Diffusion Plant (PGDP) which was traced from 1953 to 2003. The subdivisions were made to assess the mortality risks in a sub-group of workers employed solely during the plant's refit period, a time of suspected higher exposure to metal dusts (nickel, arsenic, chromium and uranium) and trichloroethylene. METHODS Thi...

Bifurcation and temporal periodic patterns in a plant-pollinator model with diffusion and time delay effects.

This paper deals with a plant-pollinator model with diffusion and time delay effects. By considering the distribution of eigenvalues of the corresponding linearized equation, we first study stability of the positive constant steady-state and existence of spatially homogeneous and spatially inhomogeneous periodic solutions are investigated. We then derive an explicit formula for determining the ...

Measurements of Gaseous Diffusion Coefficients

Accurate knowledge of molecular diffusion coeffi· cients and their temperature dependence is important in obtaining fundamental information on forces be· tween unlike molecules. Until recently most diffusion measurements were conducted over short temperature intervals because the conventional methods such as the Loschmidt or the Stefan, require the thermostating of large, static systems. Walker...

Occupational exposure to trichloroethylene and cancer risk for workers at the Paducah Gaseous Diffusion Plant.

OBJECTIVE The Paducah Gaseous Diffusion Plant (PGDP) became operational in 1952; it is located in the western part of Kentucky. We conducted a mortality study for adverse health effects that workers may have suffered while working at the plant, including exposures to chemicals. MATERIALS AND METHODS We studied a cohort of 6820 workers at the PGDP for the period 1953 to 2003; there were a tota...

Evaluation of Groundwater Management/Remediation Technologies for Application to the Paducah Gaseous Diffusion Plant