Dynamic light scattering (DLS) is widely used for the characterization of size distributions polymers and nanoparticles in dispersions. The time correlation function scattered intensity can be calculated from fluctuation with converted into scatterers. It has been difficult to apply DLS a dispersion containing large pollutant particles, however, because pollutants moving give rise intense noise...

Radiocesium is an important environmental contaminant in fallout from nuclear reactor accidents and atomic weapons testing. A modified Diffusion-Sorption-Fixation (mDSF) model, based on the advection-dispersion equation, is proposed to describe the vertical migration of radiocesium in soils following fallout. The model introduces kinetics for the reversible binding of radiocesium. We test the m...

UNLABELLED To protect occupants from infectious diseases or possible chemical/biological agents released by a terrorist in an enclosed space, such as an airliner cabin, it is critical to identify gaseous contaminant source locations and strengths. This paper identified the source locations and strengths by solving inverse contaminant transport with the quasi-reversibility (QR) and pseudo-revers...

in this paper, a modeling tool for risk assessment analysis of the movement of hydrocarbon contaminants in the vadose zone and mass flux of contamination release into the groundwater table was developed. also, advection-diffusion-reaction equations in combination with a three-phase equilibrium state between trapped air, soil humidity, and solid particles of unsaturated soil matrix were numerica...

TOPIC: Critical Care TYPE: Fellow Case Reports INTRODUCTION: Coagulase-negative staphylococcus (CoNS) is a common harmless skin commensal and often disregarded when isolated in clinical specimens. However, this colonizer can prove to be pathogenic life-threatening CASE PRESENTATION: A 24-year-old obese woman with Grave's disease type 1 diabetes presented altered mental status. She was tachycard...

This Special Issue highlights many of the predominant contaminant transport and fate processes that redistribute solutes through natural engineered surface subsurface environments [...]

Hydrodynamic dispersion is an important factor controlling contaminant migration in the subsurface environment. However, few comprehensive data sets exist for critically evaluating the impact of travel distance and site heterogeneity on solute dispersion. Therefore, a series of field-scale experiments using tritiated water (H2O), and bromide (Br) as tracers was conducted on the U.S. Department ...