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Tesis sobre el tema "Nitrification"

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Publicado: 4 de junio de 2021
Última modificación: 25 de julio de 2025

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1

Ballinger, Stuart John. "Molecular ecology of nitrification in a denitrification nitrification wastewater treatment system." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312005.

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2

Rahman, Mohammad Shahedur. "Nitrification in premise plumbing systems." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/rahman/RahmanM0808.pdf.

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Monochloramine is increasingly used instead of free chlorine as a secondary disinfectant. Ammonia is introduced into water for monochloramine formation or by decay. Nitrification can have deleterious effects on water quality that may lead to regulatory violations. In this project water quality and influence of pipe material on the onset of nitrification and consequences of nitrification in premise plumbing were investigated. Also potential control strategies for nitrification were evaluated. Initially two types of copper coupons (new and old, i.e., pre-exposed to 0.1N NaOH solution) were used
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3

Wehrfitz, Josa-Marie. "The biochemistry of heterotrophic nitrification." Thesis, University of East Anglia, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318038.

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4

Hill, Michael Oliver. "Heterotrophic nitrification in Paracoccus denitrificans." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393135.

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5

Buchwald, Carolyn. "Oxygen isotope systematics of nitrification." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/114328.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2007.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 39-41).<br>During nitrification there is an exchange of oxygen atoms between water and nitrite, causing the [delta]¹⁸O of nitrate produced by nitrification to be closer to the [delta]¹⁸O of water than expected. A series of lab and field experiments were set up in order to quantify the exchange, and then calculate the [delta]¹⁸O of nitrate with these values. The lab experiments tested the excha
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6

Allison, Stuart M. "Autotrophic nitrification at low pH." Thesis, University of Aberdeen, 1989. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU020926.

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The effect of low pH on autotrophic ammonia oxidation was to be investigated. Autotrophic ammonia oxidisers were successfully isolated from soils of low pH, from sites around Scotland, in an attempt to determine if acid tolerant or acidiphilic strains were responsible for nitrification in these soils. No acid tolerant bacteria were isolated and adaptation, of nitrifiers, to low pH was not found to have occurred during the maintenance of agricultural soil plots at low pH. Carbonate was found to be limiting at low pH, if sodium carbonate, alone, was used to adjust the pH of the medium. The pH mi
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7

Burton, Simon Alexander Quentric. "Ureolytic nitrification at low pH." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU052828.

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Laboratory studies of ureolytic nitrification were carried out to determine whether the ability of ammonia oxidisers to hydrolyse urea could explain their persistence and activity in acid soils. Ammonia oxidising bacteria were isolated from a number of acid soils, using previously described and novel techniques, and isolates tested for their ability to hydrolyse urea. None of the 17 isolated strains were found to be ureolytic, nor were they active below pH 7, indicating the persistence of neutrophilic ammonia oxidisers in acidic soils. The failure to isolate ureolytic and acidophilic strains s
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8

Newton, Andrew P. G. "Investigations into the kinetics of nitrification." Thesis, Heriot-Watt University, 1990. http://hdl.handle.net/10399/1482.

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9

Niemiera, Alexander X. "Nitrification in a pine bark medium." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76465.

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The influence of nitrification on the “soil” solution of container media has not been documented. The investigation of this influence is justified since the ionic form of N in a soil solution has a significant influence on plant tissue nutrient content and growth. Three genera of woody plants were grown in one-liter containers filled with pine bark, treated with and without a nitrification inhibitor and fertilized with 210 ml of a 100 ppm NH₄-N solution. Without the inhibitor and over time, “soil” solution NH₄-N concentrations and pH decreased and NO₃-N concentrations increased. “Soil” solutio
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10

Bello, Marcus. "The effect of major environmental factors on archaeal and bacterial ammonia oxidisers in soil." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=236940.

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Nitrification is the conversion of ammonia to nitrate via nitrite and is performed by ammonia oxidising archaea (AOA), complete ammonia-oxidiser (comammox) and ammonia and nitrite oxidising bacteria (AOB and NOB). The aim of this study is to examine the effect of ammonia concentration, temperature, drought and inhibitors on activity of AOA and AOB using soil microcosms and cultures. Ammonia concentration in soil increases during drought due to the reduced soil water content and, with desiccation stress or a combination of both factors, may result in reported greater inhibition of AOA than AOB
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11

Biddle, Jeremy R. "Tertiary nitrification of wastewater in trickling filters." Thesis, Cranfield University, 1994. http://dspace.lib.cranfield.ac.uk/handle/1826/4165.

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This study was designed to investigate, at laboratory and pilot scale, the effects of various loading and climatic factors on the nitrification perfon-nance of four media, and to undertake a comparative assessment of the media. The media used were blast furnace slag and three random plastic media: Flocor RS, Etapak 160 and a new medium, Etapak 210. Laboratory experiments using pure cultures of Nitrosomonas europaea have determined the effect on nitrification of temperature, pH and substrate, BOD and inhibitor concentrations. Optimal values have been resolved for the temperature and pH and half
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12

Maguluri, Kanchana. "Nitrification performance of a modified aerated lagoon." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5098.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on October 30, 2007) Includes bibliographical references.
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13

Grunditz, Camilla. "Bioassays for the determination of nitrification inhibition /." Stockholm : Tekn. högskolan, 1999. http://www.lib.kth.se/abs99/grun0528.pdf.

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14

Rudebeck, Anna. "Factors affecting nitrification in European forest soils /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5879-X.pdf.

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15

Bellucci, Micol. "Empirical and theoretical approaches for engineering nitrification." Thesis, University of Newcastle Upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531754.

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16

Crossman, Lisa Caroline. "Physiological and genetic studies on heterotrophic nitrification." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389222.

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17

Clabaugh, Matthew McConnell. "Nitrification of Landfill Leachate by Biofilm Columns." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33547.

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Landfill leachate characteristics vary depending on the operation type of the landfill and the age of the landfill. At landfills operated as bioreactors, where leachate recirculation is practiced, leachate ammonia nitrogen concentrations may accumulate to extremely higher levels than during single pass leaching, thereby requiring treatment before final discharge to a receiving system (Onay, 1998). Usually several physical/chemical wastewater treatment technologies are used to treat the leachate. In most cases the COD and BOD are treated, and then nitrification is performed in a separate s
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18

Simpson, D. J. "3-nitropropionic acid metabolism and nitrification in legumes." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639038.

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The occurrence of 3-nitropropionic acid (3NPA) was measured in 80 legume species. 3 NPA was detected in 19 species, 6 of which have not been recorded previously as containing 3NPA. 3NPA oxidase was detected in 15 of these species, but not in <I>Astragalus hamosus, Astragalus excapus</I> and <I>Astragalus massiliensis</I>. The enzyme was not detected in species which do not accumulate 3NPA. Annual variation in 3NPA levels was detected in field populations of <I>Hippocrepis comosa</I>, with levels significantly higher from April to September. 3NPA was also detected in <I>Hippocrepis comosa</I> l
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19

Mpongwana, Ncumisa. "Nitrification and aerobic denitrification in cyanide-containing wastewater." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2371.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.<br>Anthropogenic activities that utilise cyanide in various chemical forms have resulted in the disposal of cyanide-contaminated effluents into drainage systems that ultimately reach wastewater treatment plants (WWTP), without prior treatment. Cyanides (CN) and soluble salts could potentially inhibit biological processes in WWTP, which are responsible for the removal of contaminants from incoming wastewaters. The removal of nitrogenous compounds from such waters in processes such as nitrification and denitrif
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20

Jimenez, Cisneros Blanca E. "Nitrification-dénitrification par couplage de deux filtres immergés." Toulouse, INSA, 1985. http://www.theses.fr/1985ISATA007.

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21

Srinivas, D. S. R. K. "Nitrification enhancement in lagoons using fixed film media." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6267.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on May 27, 2009) Includes bibliographical references.
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22

Abumoghli, Iyad. "Modelling nitrification in the River Zarka of Jordan." Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336090.

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23

Watkins, Natalie Lisa. "The ability of nitrification inhibitors to decrease denitrification rates in dairy farm soils." The University of Waikato, 2007. http://hdl.handle.net/10289/2518.

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Increasing pressure is being placed on the dairy industry to reduce nitrogen losses from soil. Nitrification inhibitors are a management strategy that could be implemented on dairy farms to help reduce losses of nitrogen. Nitrification inhibitors work by temporarily inhibiting the microbial conversion of soil ammonium to nitrate. Past trials have indicated that nitrification inhibitors can increase grass production and decrease nitrate leaching; however, little is known about the long-term effects on other soil nitrogen processes such as denitrification. Denitrification rates in soils can
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24

Mendum, Thomas Alan. "The molecular ecology of autotrophic ammonia oxidising bacteria in agricultural soils." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324014.

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25

Gillen, Susan Marie. "Links between species diversity of ammonia oxidising bacteria and pH." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275092.

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Our ability to analyse natural microbial populations has recently been revolutionised by the application of 16S rDNA-based techniques. These techniques have proven particularly appropriate for ammonia oxidising bacteria, which carry out the initial and rate-determining step in nitrification. The strong effect of pH on ammonia oxidisers has been well documented; growth in liquid batch culture rarely occurs at pH values below 6.5 but autotrophic nitrification can occur in acidic soils. This study aims to examine the effects of pH in ammonia oxidisers in soil and laboratory culture.  We employ bo
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26

Barnes, Jonathan. "Nitrous oxide in UK estuaries." Thesis, University of Newcastle upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273682.

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27

Barnard, Romain. "Effets d'une concentration élevée en CO2 atmosphérique sur le cycle de l'azote dans les écosystèmes herbacés." Paris 11, 2003. http://www.theses.fr/2003PA112241.

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Les changements globaux sont en train de modifier le fonctionnement des écosystèmes à l'échelle planétaire. L'augmentation de la concentration en CO-2 atmosphérique fait partie de ces changements, et les prévisions de son évolution future sont proches d'un doublement du taux actuel d'ici un sièc1e. Nous avons étudié l'effet d'une teneur élevée en CO-2 atmosphérique sur les processus affectant les transformations de l'azote dans le sol, principalement à partir de sa forme ammonium. Nous avons en particulier cherché à mieux comprendre comment les activités enzymatiques de nitrification (NEA) et
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28

Batchelor, Sheila E. "The effect of pH, inhibitors and nutrient deprivation on ammonia oxidation." Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602305.

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N. europaea recovering from up to 7 days starvation showed no lag phase before nitrifying activity or growth could be measured. Cells starved for 1- 4 weeks had a lag phase of 20 - 40 min before activity. Cells starved for 0 - 7 d had no lag phase before growth. A lag phase before growth was initiated after 1 - 2 weeks starvation, which increased to 93 - 98 h after 6 weeks of starvation. Between 1 and 6 weeks starvation the nitrifying activity per ml of recovering cell suspension decreased significantly. N. europaea was also starved in continuous flow sand and soil columns. Cells recovering fr
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29

Chʻeng, Ching. "An experimental and mathematical investigation of the nitrogenous oxygen demand of wastewater /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12430237.

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30

Sivret, Eric Claude Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Off-gas Nitrous Oxide monitoring for nitrification aeration control." Publisher:University of New South Wales. Civil & Environmental Engineering, 2009. http://handle.unsw.edu.au/1959.4/43702.

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Effective control of nitrification processes employed at municipal wastewater treatment plants is essential for maintaining process reliability and minimizing environmental impacts and operating costs. While a range of process control strategies are available, they share a dependence on invasive liquid phase monitoring and are based on a periphery understanding of the metabolic status of the processes being controlled. Utilization of off-gas nitrous oxide (N2O) monitoring as a real-time indicator of the process metabolic status is a novel process control concept with the potential to address t
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31

Kosari, Fatemeh. "Nitrogen removal from wastewater through partial nitrification/ Anammox process." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36921.

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Nitrogen removal from wastewater through partial nitrification/Anammox was investigated. The objectives of the research were divided to three distinctive and related areas: Partial Nitrification (PN) process, Anammox reaction and green house gases emission from partial nitrification and Anammox reactor. In the PN process, research objectives were to determine: 1) the effect Dissolved Oxygen concentration, alkalinity on the PN reaction 2) evaluation of continuous moving bed biofilm reactor (MBBR) and sequencing batch reactor (SBR) for partial nitrification process. The main goals of the Anamm
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32

Rostron, Wendy Margaret. "Nitrification of high strength ammonia wastewaters using immobilised nitrifiers." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286353.

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33

Brito, Ivana Regina Couto De. "Ecology of nitrification in oil refinery wastewater treatment systems." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1161.

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The diversity and abundance of ammonia oxidizing bacteria (AOB) and Archaea (AOA) were investigated in five oil refinery wastewater treatment plants in the UK using culture-independent molecular techniques. The AOB found in the plants were phylogenetically associated with the Nitrosomonas oligotropha and Nitrosomonas marina lineages and clones related to the Nitrosomonas oligotropha lineage may represent novel AOB species. Putative AOA were found in a trickling filter system and in two activated sludge systems and were phylogenetically placed within marine group 1.1a and terrestrial group 1.1b
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34

Stephenson, Dianne. "Bioaugmentation for the improvement of nitrification in wastewater treatment." Thesis, Cranfield University, 1993. http://dspace.lib.cranfield.ac.uk/handle/1826/11195.

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The literature relating to nitrification in wastewater treatment and bioaugmentation as a method to enhance wastewater treatment processes is reviewed. The use of a commercially available bioaugmentation product (based on a Nitrosomonas culture), which claimed to enhance nitrification in biological wastewater treatment was investigated.The product was tested in full scale trials, in shake flask experiments and its efficacy modelled using a simple activated sludge simulation. At full scale trickling filter plants a bioaugmentation product designed to enhance BOO removal was also tested. This pr
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35

Moodley, Rajan. "External nitrification in biological nutrient removal activated sludge systems." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/9945.

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Includes bibliography.<br>In conventional nitrification-denitrification biological excess phosphorous removal (NDBEPR) activated sludge systems, such as the UCT system for example, both nitrification and phosphorous uptake (P uptake) occur simultaneously in the, usually large, aerobic reactor. In the UCT system the nitrate load to the anoxic reactor is limited by the a-recycle (i.e. system constraint recycle from the aerobic to the anoxic reactor) and the internal aerobic nitrification performance. The latter process, is mediated by the nitrifiers having a slow growth rate of 0.45/d, governs t
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36

Sötemann, Sven. "External nitrification in biological nutrient removal activated sludge systems." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/5003.

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Summary in English.<br>Bibliography: leaves 5.1-5.7.<br>Biological nutrient removal activated sludge (BNRAS) systems have become the preferred treatment system for advanced municipal wastewater treatment in South Africa. They have proven to be cost-effective systems that produce effluents of excellent quality that can be re-introduced to the receiving water bodies without a significant negative impact on the scarce surface water of South Africa. The widespread implementation of the BNRAS system has drawn attention to some of the weaknesses of the system, predominantly (i) the long sludge ages
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37

Lubkowitz, Erika M. "Biological treatment schemes for preventing oxime inhibition of nitrification." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-10022008-063211/.

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38

Chen, Yao. "Full nitrification of human urine in a sequencing batch reactor /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202009%20CHEN.

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39

Bateman, Emma Joanne. "The contribution of nitrification to nitrous oxide emissions from soils." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416462.

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40

Sambola, Alejandro. "N2O emission in a full-scale partial nitrification/anammox process." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171804.

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The reduction of the emission of greenhouse gases to the atmosphere will be one of the challenges that society will have to face in the coming years. Until now, all efforts have been put in improving the properties of the discharged water in a wastewater treatment plant and the efficiency of the whole process. But little effort has been done in measuring and controlling the greenhouse gas emissions. For this reason, the production of nitrous oxide when treating wastewater has become of great concern. Several measurements in laboratory scale and full scale have been done and a wide range of res
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41

Webb, David W. "WATER QUALITY VARIATIONS DURING NITRIFICATION IN DRINKING WATER DISTRIBUTION SYSTEMS." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4492.

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This thesis documents the relationship among the major water quality parametersduring a nitrification episode. Nitrification unexpectedly occurred in a chloraminated pilotdrinking water distribution system practicing with a 4.0 mg/L as Cl[subscript 2] residual dosed at 4.5:1Cl[subscript 2]:NH[subscript 3]-N. Surface, ground and sea water were treated and disinfected withmonochloramines to produce finished water quality similar to regional utility water quality.PVC, galvanized, unlined cast iron and lined iron pipes were harvested from regionaldistribution systems and used to build eighteen pil
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42

Romano, Stephen. "Definition of operating guidelines for nitrification from historical operations records." Honors in the Major Thesis, University of Central Florida, 1996. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/156.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering<br>Civil and Environmental Engineering
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43

Wouters-Wasiak, Katia. "Etude et contrôle des processus de nitrification - dénitrification - déphosphatation biologique." Toulouse, INSA, 1994. http://www.theses.fr/1994ISAT0060.

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Le travail entrepris comporte trois axes de recherche : étude des cinétiques de nitrification sur site et en batch ; étude des cinétiques de relargage et de réabsorption du phosphore ; évaluation de l’intérêt de la mesure de potentiel d’oxydoréduction pour le contrôle des processus de nitrification/dénitrification et de déphosphatation biologique. Le suivi sur station comme les essais en batch ont démontré que, pour un âge de boue suffisant, la vitesse de nitrification, exprimée par litre de boue, varia peu avec la concentration en boues, dans la gamme de 2 à 4. 5 b/l de MVS. Des expériences e
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44

Li, Fang Han. "Nitrification et dénitrification endogène par lits bactériens et bassin d'anoxie." Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0006.

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Deux études en pilotes ont été menées pour évaluer les performances d'une filière d 'élimination de la DCO et du NTK. La filière comporte deux lits bactériens avec remplissage plastique Closonyle, un décanteur intermédiaire , un bassin anoxique et un décanteur final. Dans la première étude, la bassin anoxique est placé entre le premier lit et le décanteur intermédiaire. Un taux de recyclage toatl est appliqué à ce niveau. Le système à fonctionné pendant 11 mois dans la station d'épuration de Pierre Bénite près de Lyon, recevant un effluent issu du premier décanteur de la station. Dans la deuxi
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45

Shade, Michael E. "Effect of nitrification on lead corrosion in chloraminated distribution systems." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1233081293/.

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46

Mpongwana, Ncumisa. "Metabolic network modelling of nitrification and denitrification under cyanogenic conditions." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2982.

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Thesis (PhD (Chemical Engineering))--Cape Peninsula University of Technology, 2019<br>Simultaneous nitrification and aerobic denitrification (SNaD) is a preferred method for single stage total nitrogen (TN) removal, which was recently proposed to improve wastewater treatment plant design. However, SNaD processes are prone to inhibition by toxicant loading with free cyanide (CN-) possessing the highest inhibitory effect on such processes, rendering these processes ineffective. Despite the best efforts of regulators to limit toxicant disposal into municipal wastewater sewage systems (MWSSs), fre
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47

Widén, Britta. "Nitrification and denitrification in seagrass communities in Chwaka bay, Zanzibar." Thesis, Uppsala universitet, Institutionen för geovetenskap, 1996. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393143.

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As a response to the environmental degradation of many coastal areas in east Africa research have been initiated aiming towards the understanding of the coastal ecosystems and the interactions between them. The sediment of three seagrass communities were investigated with regard to nitrification, denitrification, pore water nutrient content, organic content and physical character. The aim was to estimate the magnitude and importance of nitrification and denitrification and correlate those to any difference in organic load. Total organic carbon and total nitrogen decreased while C:N ratio incre
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48

Song, Weining. "Some aspects of the utilization of inorganic nitrogen compounds and carbon compounds by "Nitrobacter hamburgensis" /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09A/09as724.pdf.

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Hsiao, Y. H. "Nitrate respiration in freshwater environments, microcosms and cultured bacteria." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338243.

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Denitrification is the process by which bacteria reduce nitrate to dinitrogen gas. Most denitrifying bacteria perform these reactions under anaerobic conditions only. Thiosphaera pantotropha is one of a number of species capable of aerobic denitrification. During aerobic growth T. pantotropha expresses a periplasmic nitrate reductase but under anaerobic growth conditions nitrate is reduced by a membrane-bound nitrate reductase. The periplasmic nitrate reductase is relatively insensitive to azide and does not reduce chlorate. Aerobic denitrification provides a mechanism to dispose of excess red
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Mühlherr, Ingo H. "Nitrous oxide in British limestone aquifers." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389365.

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