Analysis of Micromixers to Reduce Biofouling on Reverse-Osmosis Membranes
Environmental Progress
Abstract not provided.
Publications
Fluorescence Hyperspectral Imaging of Biofilms
Abstract not provided.
Biofilm-Related Research at Sandia National Laboratories
Integration and decontamination of Bacillus cereus in Pseudomonas fluorescens biofilms grown in a model drinking-water system
Journal of Applied Microbiology
Abstract not provided.
Probing Deviations from Traditional Colloid Filtration Theory by Atomic Force Microscopy
Abstract not provided.
Colloid Transport in Saturated Fractured Media: Experimental and Numerical Investigations using Synthetic and Natural Fracture Materials
Abstract not provided.
Testing the Concept of Drift Shadow with X-Ray Absorption Imaging Experiments
Abstract not provided.
Testing of RO Membrane Biofouling Using Fluorescent Hyperspectral Imaging
Abstract not provided.
Experimental Observation of the Drift-Shadow Effect using X-Ray Absorption Imaging
Journal of Hydrology
Abstract not provided.
INTERACTION FORCES MEASURED BY ATOMIC FORCE MICROSCOPY FOR MUSCOVITE AND CARBOXYL-MODIFIED MICROSPHERES AS A FUNCTION OF IONIC STRENGTH
Abstract not provided.
Fluorescent hyperspectral imaging of biofilms on water treatment membranes
Abstract not provided.
Testing the concept of drift shadow with X-ray abortion imaging experiments
Abstract not provided.
Preliminary assessment of the interaction of introduced biological agents with biofilms in water distribution systems
Basic research is needed to better understand the potential risk of dangerous biological agents that are unintentionally or intentionally introduced into a water distribution system. We report on our capabilities to conduct such studies and our preliminary investigations. In 2004, the Biofilms Laboratory was initiated for the purpose of conducting applied research related to biofilms with a focus on application, application testing and system-scale research. Capabilities within the laboratory are the ability to grow biofilms formed from known bacteria or biofilms from drinking water. Biofilms can be grown quickly in drip-flow reactors or under conditions more analogous to drinking-water distribution systems in annular reactors. Biofilms can be assessed through standard microbiological techniques (i .e, aerobic plate counts) or with various visualization techniques including epifluorescent and confocal laser scanning microscopy and confocal fluorescence hyperspectral imaging with multivariate analysis. We have demonstrated the ability to grow reproducible Pseudomonas fluorescens biofilms in the annular reactor with plate counts on the order of 10{sup 5} and 10{sup 6} CFU/cm{sup 2}. Stationary phase growth is typically reached 5 to 10 days after inoculation. We have also conducted a series of pathogen-introduction experiments, where we have observed that both polystyrene microspheres and Bacillus cereus (as a surrogate for B. anthracis) stay incorporated in the biofilms for the duration of our experiments, which lasted as long as 36 days. These results indicated that biofilms may act as a safe harbor for bio-pathogens in drinking water systems, making it difficult to decontaminate the systems.
Characterization and mechanisms of radionuclide sorption in soils
Abstract not provided.
Visualization and Quantification of Heterogeneous Diffusion Rates in Granodiorite Samples by X-Ray Absorption Imaging
Abstract not provided.
International Workshop on Approaches for Upscaling Processes Affecting Radionuclide Transport through the Subsurface
Eos, Transactions, American Geophysical Union
Abstract not provided.
International Workshop on Approaches for Upscaling Processes Affecting Radionuclide Transport through the Subsurface
Abstract not provided.
Results 76–92 of 92