Publications

ferrographic tracking of bacterial transport in the field at the narrow channel focus area, oyster, va.	the first results from an innovative bacterial tracking technique, ferrographic capture, applied to bacterial transport in groundwater are reported in this paper. ferrographic capture was used to analyze samples during an october 1999 bacterial injection experiment at the narrow channel focus area of the south oyster site, va. data obtained using this method showed that the timing of bacterial breakthrough was controlled by physical (hydraulic conductivity) heterogeneity in the vertical dimensio ...	2001	11352009
relative dominance of physical versus chemical effects on the transport of adhesion-deficient bacteria in intact cores from south oyster, virginia.	bacterial transport experiments were conducted using intact sediment cores collected from sites on the delmarva peninsula near south oyster, va, to delineate the relative importance of physical and chemical heterogeneity in controlling transport of an adhesion-deficient bacterial strain. electron microscopy revealed that the sediments consisted of quartz and feldspar with a variable amount of clay and iron and aluminum hydroxide coatings on the grains. a nonmotile, gram-negative indigenous groun ...	2002	11918012
application of a vital fluorescent staining method for simultaneous, near-real-time concentration monitoring of two bacterial strains in an atlantic coastal plain aquifer in oyster, virginia.	two differentially labeled bacterial strains were monitored in near-real time during two field-scale bacterial transport experiments in a shallow aquifer in july 2000 and july 2001. comamonas sp. strain da001 and acidovorax sp. strain oy-107 were grown and labeled with the vital fluorescent stain tamra/se (5 [and -6]-carboxytetramethylrhodamine, succinimidyl ester) or cfda/se (5 [and -6]-carboxyfluorescein diacetate, succinimidyl ester). fluorescently labeled cells and a conservative bromide tra ...	2004	15006793