Search Results - "Nedwell, David B."

Diversity and Abundance of Nitrate Reductase Genes (narG and napA), Nitrite Reductase Genes (nirS and nrfA), and Their Transcripts in Estuarine Sediments by SMITH, Cindy J, NEDWELL, David B, DONG, Liang F, OSBORN, A. Mark

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Changes in Benthic Denitrification, Nitrate Ammonification, and Anammox Process Rates and Nitrate and Nitrite Reductase Gene Abundances along an Estuarine Nutrient Gradient (the Colne Estuary, United Kingdom) by Dong, Liang F, Smith, Cindy J, Papaspyrou, Sokratis, Stott, Andrew, Osborn, A. Mark, Nedwell, David B

“…Estuarine sediments are the location for significant bacterial removal of anthropogenically derived inorganic nitrogen, in particular nitrate, from the aquatic…”
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Nitrate reduction functional genes and nitrate reduction potentials persist in deeper estuarine sediments. Why? by Papaspyrou, Sokratis, Smith, Cindy J, Dong, Liang F, Whitby, Corinne, Dumbrell, Alex J, Nedwell, David B

“…Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are processes occurring simultaneously under oxygen-limited or anaerobic conditions,…”
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Seasonal variation in denitrification and dissimilatory nitrate reduction to ammonia process rates and corresponding key functional genes along an estuarine nitrate gradient by Smith, Cindy J, Dong, Liang F, Wilson, John, Stott, Andrew, Osborn, A Mark, Nedwell, David B

“…This research investigated spatial-temporal variation in benthic bacterial community structure, rates of denitrification and dissimilatory nitrate reduction to…”
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Evaluation of quantitative polymerase chain reaction-based approaches for determining gene copy and gene transcript numbers in environmental samples by Smith, Cindy J., Nedwell, David B., Dong, Liang F., Osborn, A. Mark

“…Summary Quantitative polymerase chain reaction (Q‐PCR) amplification is widely applied for determining gene and transcript numbers within environmental…”
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Environmental Costs of Freshwater Eutrophication in England and Wales by Pretty, Jules N, Mason, Christopher F, Nedwell, David B, Hine, Rachel E, Leaf, Simon, Dils, Rachael

“…Eutrophication has many known consequences, but there are few data on the environmental and health costs. We developed a new framework of cost categories that…”
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Methane oxidation in temperate soils: effects of inorganic N by Reay, David S., Nedwell, David B.

“…Additions of inorganic nitrogen (N) to an oak soil with significant potential for methane (CH 4) oxidation resulted in differential reduction in CH 4 oxidation…”
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Detection and Diversity of Expressed Denitrification Genes in Estuarine Sediments after Reverse Transcription-PCR Amplification from mRNA by NOGALES, Balbina, TIMMIS, Kenneth N, NEDWELL, David B, OSBORN, A. Mark

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Sources of Nitrogen Used for Denitrification and Nitrous Oxide Formation in Sediments of the Hypernutrified Colne, the Nutrified Humber, and the Oligotrophic Conwy Estuaries, United Kingdom by Dong, Liang F., Nedwell, David B., Stott, Andrew

“…Rates of denitrification and nitrous oxide (N2O) formation, and the sources of N2and N2O, were examined by the isotope-pairing technique in three U.K…”
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Denitrifier Still Has the Important Role in Nitrate Reduction to N2 Although It is Not the Predominant Population in the Estuarine Bacterial Community of Nitrate Reducing Bacteria by Rusmana, Iman, Nedwell, David B.

“…Denitrification and nitrate-ammonification are the responsible processes for nitrate removal in the estuaries. Temperature, nitrate and organic carbon…”
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amoA Gene abundances and nitrification potential rates suggest that benthic ammonia-oxidizing bacteria and not Archaea dominate N cycling in the Colne Estuary, United Kingdom by Li, Jialin, Nedwell, David B, Beddow, Jessica, Dumbrell, Alex J, McKew, Boyd A, Thorpe, Emma L, Whitby, Corinne

“…Nitrification, mediated by ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), is important in global nitrogen cycling. In estuaries where…”
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Dissimilatory reduction of nitrate to ammonium, not denitrification or anammox, dominates benthic nitrate reduction in tropical estuaries by Dong, Liang F., Sobey, Milika Naqasima, Smith, Cindy J., Rusmana, Iman, Phillips, Wayne, Stott, Andrew, Osborn, A. Mark, Nedwell, David B.

“…We measured benthic denitrification (DN) and dissimilatory reduction of nitrate to ammonium (DNRA) using the isotope-pairing technique in three tropical…”
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Temperature Dependence of Inorganic Nitrogen Uptake: Reduced Affinity for Nitrate at Suboptimal Temperatures in Both Algae and Bacteria by Reay, D S, Nedwell, D B, Priddle, J, Ellis-Evans, J C

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Use of chlorate as a selective inhibitor to distinguish membrane-bound nitrate reductase (Nar) and periplasmic nitrate reductase (Nap) of dissimilative nitrate reducing bacteria in sediment by Rusmana, Iman, Nedwell, David B.

“…The use of chlorate as a selective inhibitor of dissimilative nitrate reduction was studied using pure cultures of Comamonas testosteroni (a denitrifier) and…”
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Spatial Dynamics of Sulphate-reducing Bacterial Compositions in Sediment along a Salinity Gradient in a UK Estuary by Kondo, Ryuji, Purdy, Kevin J., Silva, Silvana de Queiroz, Nedwell, David B.

“…The diversity of sulphate-reducing bacteria (SRB) was investigated in sediments along environmental gradients in the River Colne estuary, Essex, UK. DNA…”
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Nitrous Oxide Formation in the Colne Estuary, England: the Central Role of Nitrite by DONG, Liang F, NEDWELL, David B, UNDERWOOD, Graham J. C, THORNTON, Daniel C. O, RUSMANA, Iman

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Comparison of the molecular diversity of the methanogenic community at the brackish and marine ends of a UK estuary by Purdy, Kevin J., Munson, Mark A., Nedwell, David B., Embley, T. Martin

“…Abstract The 16S rRNA sequence diversity of the euryarchaeal community in a predominately freshwater sediment at East Hill Bridge (EHB) on the River Colne…”
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UK catchment nutrient loads 1993-2003, a new approach using harmonised monitoring scheme data: temporal changes, geographical distribution, limiting nutrients and loads to coastal waters by Earl, Timothy J, Upton, Graham J G, Nedwell, David B

“…The work provides robust estimates of nutrient loads (nitrate and phosphate) from all UK catchments: as required by the Water Framework Directive to monitor…”
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Simultaneous measurement of phytoplanktonic primary production, nutrient and light availability along a turbid, eutrophic UK east coast estuary (the Colne Estuary) by Kocum, Esra, Underwood, Graham J. C., Nedwell, David B.

“…Primary production, algal biomass, light conditions and dissolved inorganic nutrient concentrations were monitored simultaneously along the Colne Estuary, UK…”
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Oxidation of hydrogen sulphide in sour gas by Chlorobium limicola by Ball, Andrew S., Nedwell, David B., Perkins, Rupert G.

“…The aim of this work was to assess the potential for bacterial oxidation of hydrogen sulphide as a purification method of sour gas. Using a continuous culture…”
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