Search Results - "Lawrence, J.R"

Precipitation of amorphous CaCO3 (aragonite-like) by cyanobacteria: A STXM study of the influence of EPS on the nucleation process by Obst, M., Dynes, J.J., Lawrence, J.R., Swerhone, G.D.W., Benzerara, K., Karunakaran, C., Kaznatcheev, K., Tyliszczak, T., Hitchcock, A.P.

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Microbial communities in low permeability, high pH uranium mine tailings: characterization and potential effects by Bondici, V.F., Lawrence, J.R., Khan, N.H., Hill, J.E., Yergeau, E., Wolfaardt, G.M., Warner, J., Korber, D.R.

“…Aims To describe the diversity and metabolic potential of microbial communities in uranium mine tailings characterized by high pH, high metal concentration and…”
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In situ evidence for microdomains in the polymer matrix of bacterial microcolonies by Lawrence, J R, Swerhone, G D W, Kuhlicke, U, Neu, T R

“…Confocal laser scanning microscopy and fluorescent lectin-binding analyses (FLBA) were used to study the form, arrangement, and composition of exopolymeric…”
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Soft X‐ray spectromicroscopy for speciation, quantitation and nano‐eco‐toxicology of nanomaterials by LAWRENCE, J.R., SWERHONE, G.D.W., DYNES, J.J., KORBER, D.R., HITCHCOCK, A.P.

“…Summary There is a critical need for methods that provide simultaneous detection, identification, quantitation and visualization of nanomaterials at their…”
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Comparative microscale analysis of the effects of triclosan and triclocarban on the structure and function of river biofilm communities by Lawrence, J.R., Zhu, B., Swerhone, G.D.W., Roy, J., Wassenaar, L.I., Topp, E., Korber, D.R.

“…The broad spectrum antimicrobials triclosan (TCS) and triclocarban (TCC) are commonly detected in the environment. However, there is very limited understanding…”
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Biogeochemical activity of microbial biofilms in the water column overlying uranium mine tailings by Bondici, V.F, Khan, N.H, Swerhone, G.D.W, Dynes, J.J, Lawrence, J.R, Yergeau, E, Wolfaardt, G.M, Warner, J, Korber, D.R

“…AIMS: To describe microbial diversity, biofilm composition and biogeochemical potential within biofilms in the water overlying uranium tailings characterized…”
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Relationship between water quality parameters and bacterial indicators in a large prairie reservoir: Lake Diefenbaker, Saskatchewan, Canada by North, R L, Khan, N H, Ahsan, M, Prestie, C, Korber, D R, Lawrence, J R, Hudson, J J

“…Lake Diefenbaker (LD) is a large reservoir on the South Saskatchewan River used for agricultural irrigation, drinking water, and recreation. Our objectives…”
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Effect of pumping on the spatio-temporal distribution of microbial communities in a water well field by Medihala, P.G., Lawrence, J.R., Swerhone, G.D.W., Korber, D.R.

“…A water well field adjacent to the North Saskatchewan River (City of North Battleford, Saskatchewan, Canada) with a history of rapid deterioration of both well…”
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Comparative responses of river biofilms at the community level to common organic solvent and herbicide exposure by Paule, A, Roubeix, V, Swerhone, G. D. W, Roy, J, Lauga, B, Duran, R, Delmas, F, Paul, E, Rols, J. L, Lawrence, J. R

“…Residual pesticides applied to crops migrate from agricultural lands to surface and ground waters. River biofilms are the first aquatic non-target organisms…”
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Spatial variation in microbial community structure, richness, and diversity in an alluvial aquifer by Medihala, P G, Lawrence, J R, Swerhone, G D W, Korber, D R

“…Relatively little is known regarding the spatial variability of microbial communities in aquifers where well fouling is an issue. In this study 2 water wells…”
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Phylogenetic Composition, Spatial Structure, and Dynamics of Lotic Bacterial Biofilms Investigated by Fluorescent in situ Hybridization and Confocal Laser Scanning Microscopy by W. Manz, K. Wendt-Potthoff, T. R. Neu, U. Szewzyk, Lawrence, J. R.

“…The phylogenetic composition, three-dimensional structure and dynamics of bacterial communities in river biofilms generated in a rotating annular reactor…”
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Water flow and storage in fractured, unsaturated sulphur blocks by BIRKHAM, T. K, HENDRY, M. J, BARBOUR, S. L, CAREY, S. K, LAWRENCE, J. R, LEWKO, R

“…Water is a primary control on the generation of acidic (H 2 SO 4 ) effluent from commercial-scale sulphur (S 0 ) blocks. Although clean S 0 is strongly…”
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Quantifying CO2 fluxes from soil surfaces to the atmosphere by Kabwe, L.K, Hendry, M.J, Wilson, G.W, Lawrence, J.R

“…Measurements of CO2 fluxes from ground surface of the atmosphere (soil respiration) are needed to quantify biotic and abiotic reaction rates in unsaturated…”
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In situ Characterization of Biofilm Exopolymers Involved in the Accumulation of Chlorinated Organics by G. M. Wolfaardt, Lawrence, J. R., Robarts, R. D., D. E. Caldwell

“…The chemical nature and spatial arrangements of exopolymers in a degradative biofilm community were studied using a panel of fluorescein isothiocynate- and…”
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Phosphorus limitation of heterotrophic biofilms from the Fraser River, British Columbia, and the effect of pulp mill effluent by Mohamed, M.N. (National Hydrology Research Institute, Saskatoon, Saskatchewan, Canada.), Lawrence, J.R, Robarts, R.D

“…Experiments were conducted to determine the limiting nutrient and the effect of pulp mill effluent (PME) on heterotrophic biofilms in the Fraser River, a…”
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Age-based comparison of gait asymmetry using unilateral ankle weights by Kwek, J.R. Lawrence, Williams, Genevieve K.R.

“…•Young and older locomotor systems can adapt to induced mechanical asymmetry.•Step cycle symmetry did not differ between age and mechanical asymmetry.•Older…”
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Microbial interactions with naturally occurring hydrophobic sediments: Influence on sediment and associated contaminant mobility by Droppo, I.G., Krishnappan, B.G., Lawrence, J.R.

“…The erosion, transport and fate of sediments and associated contaminants are known to be influenced by both particle characteristics and the flow dynamics…”
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An Assessment of a Mesocosm Approach to the Study of Microbial Respiration in a Sandy Unsaturated Zone by Hendry, M.J., Mendoza, C.A., Kirkland, R., Lawrence, J.R.

“…Microbial respiration rates were determined through a 3.2 m thick, sandy unsaturated zone in a 2.4 m diameter X 4.6 m high mesocosm. The mesocosm was…”
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Distribution and biogeochemical importance of bacterial populations in a thick clay-rich aquitard system by Lawrence, J. R, Hendry, M. J, Wassenaar, L. I, Germida, J. J, Wolfaardt, G. M, Fortin, N, Greer, C. W

“…To investigate the distribution of microbial biomass, populations and activities within a clay-rich, low hydraulic conductivity (10⁻¹¹ to 10⁻¹² m s⁻¹) aquitard…”
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In situ evidence for metabolic and chemical microdomains in the structured polymer matrix of bacterial microcolonies by Lawrence, J. R., Swerhone, G. D. W., Kuhlicke, U., Neu, T. R.

“…CLSM and fluorescent probes were applied to assess the structure, composition, metabolic activity and gradients within naturally occurring β-proteobacteria…”
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