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Teses / dissertações sobre o tema "Nitrogen Metabolism"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Fulayfil, Nada. "Nitrogen metabolism of Archaeoglobus fulgidus." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270335.

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2

Stevens, Carol Jean. "Nitrogen metabolism by Thiobacillus ferrooxidans /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487597424138725.

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3

Silva, Cesar José da [UNESP]. "Efeito de diferentes relações folha/grãos sobre o metabolismo do nitrogênio em diferentes partes da planta de milho." Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/96968.

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Made available in DSpace on 2014-06-11T19:28:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-02-22Bitstream added on 2014-06-13T18:34:45Z : No. of bitstreams: 1 silva_cj_me_jabo.pdf: 651711 bytes, checksum: 6f7b9a354cd661de53615cc81e866c62 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Embora esteja bem estabelecido pelos experimentos clássicos, qual são os fatores que limitam a produção, o funcionamento da planta na fase reprodutiva que envolve um complexo relacionamento tanto entre órgãos fonte e dreno de fotossintatos como do metabolismo do nitrogênio

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4

Laberge, MacDonald Tammy. "Molecular Aspects of Nitrogen Metabolism in Fishes." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/668.

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Molecular aspects of nitrogen metabolism in vertebrates is an interesting area of physiology and evolution to explore due to the different ways in which animals excrete nitrogenous waste as they transition from an aquatic to a terrestrial lifestyle. Two main products of nitrogen metabolism in fishes are ammonia and urea. Ammonia is produced during protein catabolism and build up of ammonia is toxic. Some aquatic vertebrates convert ammonia into a less toxic compound urea via de novo synthesis through the ornithine-urea cycle (O-UC). Five enzymes are involved in the O-UC: carbamoyl phosphat

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5

Dixon, G. K. "The inorganic nitrogen metabolism of marine dinoflagellates." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636452.

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Nitrogen-replete cells of <i>Amphidinium carterae</i> took up ammonium in the light at a rate 5 - 6 times that of nitrate even though exponential growth rates were similar on these two N-sources. <i>A. carterae</i> exhibited a capability for enhanced initial ammonium uptake, particularly when deprived of nitrogen. Enhanced initial rates of ammonium uptake were also observed in a natural population of <i>Gyrodinium aureolum</i>. Initially ammonium accumulated within the cells of <i>A. carterae</i> but was assimilated into organic-N within a matter of hours; increases in total cellular-N, total

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6

Allison, Clive. "Nitrogen metabolism of human large-intestinal bacteria." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306357.

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7

Schulz, Anton A. "Nitrogen metabolism in Corynebacterium glutamicum ATCC 13032." Doctoral thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/4329.

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Bibliography: leaves 125-146.<br>Corynebacterium glutamicum is extensively used for the commercial production of a host of amino acids including lysine, glutamate, and threonine. Consequently, much research has been directed at analyzing nitrogen metabolism in this bacterium. In particular, our research focused on investigating the regulation of nitrogen assimilation. Initially, we searched for homologs of the Streptomyces glnR, glnII, and glnE genes in C. glutamicum. These studies, however, were met with limited success, and we therefore decided to use promoter probe vectors in order to ident

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8

Sabag-Daigle, Anice. "Nitrogen Metabolism of the Haloarchaeon Haloferax volcanii." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250008417.

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9

Mos, Magdalena. "The control of nitrogen metabolism in Aspergillus nidulans." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539565.

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10

Alvarado, Adriana Delgado. "Interactions between carbon and nitrogen metabolism in legumes." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274992.

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11

Bon, E. P. S. "Glucoamylase production and nitrogen metabolism in Aspergullus awamori." Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306324.

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12

Ng, Doris Hui Lan. "Nitrogen metabolism and health of people with ileostomy." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427418.

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13

Tolonen, Andrew Carl. "Prochlorococcus genetic transformation and genomics of nitrogen metabolism." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/43721.

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Thesis (Ph. D.)--Joint Program in Biological Oceanography (Massachusetts Institute of Technology, Dept. of Biology; and the Woods Hole Oceanographic Institution), 2005.<br>Includes bibliographical references.<br>Prochlorococcus, a unicellular cyanobacterium, is the most abundant phytoplankton in the oligotrophic, oceanic gyres where major plant nutrients such as nitrogen (N) and phosphorus (P) are at nanomolar concentrations. Nitrogen availability controls primary productivity in many of these regions. The cellular mechanisms that Prochlorococcus uses to acquire and metabolize nitrogen are thu

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14

Li, Mengmeng. "Modeling Nitrogen and Energy Metabolism in the Bovine." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/87090.

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The objectives of this research were to: 1) evaluate the accuracy of the Molly cow model predictions of ruminal metabolism and nutrient digestion when simulating dairy and beef cattle diets, 2) advance representations of N recycling between blood and the gut and urinary N excretion in the model, 3) improve the representation of pH and to refit parameters related to ruminal metabolism and nutrient digestion in the model, 4) investigate how ruminal pH affects the microbial community, expression of carbohydrate-active enzyme transcripts (CAZymes), fiber degradation, and short chain fatty acid (SC

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15

Oelberg, Thomas Jonathan. "Meal patterns and nitrogen metabolism in dairy cows /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259580262914.

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16

Poll, Marcel Coenraad Gerhard van de. "Nitrogen metabolism and hepatocellular injury during liver resection." Maastricht : Maastricht : Universitaire Pers ; University Library, Universiteit Maastricht [host], 2008. http://arno.unimaas.nl/show.cgi?fid=13094.

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17

Silva, Cesar José da. "Efeito de diferentes relações folha/grãos sobre o metabolismo do nitrogênio em diferentes partes da planta de milho /." Jaboticabal : [s.n.], 2002. http://hdl.handle.net/11449/96968.

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Orientador: Jairo Osvaldo Cazetta<br>Banca: Antonio Álvaro Corsetti Purcino<br>Banca: Marcelo Murad Magalhães<br>Resumo: Embora esteja bem estabelecido pelos experimentos clássicos, qual são os fatores que limitam a produção, o funcionamento da planta na fase reprodutiva que envolve um complexo relacionamento tanto entre órgãos fonte e dreno de fotossintatos como do metabolismo do nitrogênio em ambos os tipos de órgãos, ainda permanece pouco esclarecido. Assim sendo, na fase de polinização foram impostas diferentes proporções de folhas (% de fonte) e de grãos (% de dreno) em plantas de milho p

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18

Reeder, Trista. "DIETARY LYSINE:CALORIE RATIOS AND THEIR INFLUENCE ON NITROGEN METABOLISM AND DIGESTIBILITY IN MODERATELY OBESE MATURE DOGS." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/183.

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This experiment was conducted to determine if changing the amount of ideal aminoacids (meaning the amount of amino acids necessary to supply all the animal's needswithout excesses or deficiencies of any single amino acid), in relation to caloric intakewill change nitrogen metabolism and weight loss in obese mature dogs. Informationprovided by this experiment can be used to formulate canine diets emphasizing weightloss in older animals.Six moderately obese mature female crossbred hounds were fed diets varying in theirratio of lysine:calories (Lysine % : Mcal ME/g) (2.2, 3.0, and 3.8) in a 3 x 3

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19

Takahashi, Cassia Ayumi. "Assimilação do nitrogênio em diferentes regiões foliares de uma bromélia epífita com tanque." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-06112008-174416/.

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A folha é o principal órgão de absorção e assimilação de nutrientes dos membros epífitos com tanque da família Bromeliaceae. Pouco se conhece sobre a nutrição dessas bromélias, entretanto algumas evidências (TAKAHASHI, 2007) indicaram a possibilidade de haver uma absorção preferencial do nitrogênio na porção basal e a assimilação desse nutriente na porção apical foliar. Para se compreender melhor os mecanismos de assimilação do nitrogênio utilizados pelas bromélias epífitas com tanque, foi proposto neste trabalho dois principais objetivos: 1) verificar possíveis diferenças quanto à capacidade

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20

Rajab, T. M. A. "Studies on carbon metabolism and nitrogen fixation by Gloeothece." Thesis, Swansea University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638610.

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When cultures of <i>Gloeothece</i> grown under constant light, were transferred to dark anerobic conditions, the rate of acetylene reduction dropped within 1h to 25-30% of that in the light, and reached a minimum after 10-12h. The only source at ATP for nitrogenase, under such conditions, is substrate level phosphorylation utilising endogenous material. All attempts to support N<SUB>2</SUB>-fixation by an exogenous source of energy proved unsuccessful. Although <i>Gloeothece</i>was able to fix nitrogen under dark anaerobic conditions, no nitrogenase synthesis was observed. <i>Gloeothece</i> su

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21

Lodwig, Emma Mary. "Regulation of carbon and nitrogen metabolism in Rhizobium leguminosarum." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368874.

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22

Dewhurst, R. J. "Studies on energy and nitrogen metabolism in the rumen." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234566.

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23

Cavan, Graeme Patrick. "Interaction of carbon and nitrogen metabolism in Schizosaccharomyces pombe." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259573.

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24

Kirsten, Catriona Jane. "Nitrogen metabolism and the regulation thereof in Mycobacterium smegmatis." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/17991.

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Thesis (PhD (Med))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The nitrogen metabolic pathway is essential for growth and survival of all living organisms including prokaryotes. Certain components of the pathway, such as the enzyme glutamine synthetase (GS), have been studied; however, little information is available regarding the pathway in the mycobacteria. Our in silico studies revealed that many of the components and mechanisms involved in the pathway appear to be conserved between closely related Actinomycetales. Therefore, we investigated three aspects of nitrogen metabo

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25

Wells, Xanthe Elizabeth. "Aspects of ureide metabolism in French beans." Thesis, The University of Sydney, 1989. https://hdl.handle.net/2123/26229.

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Allantoin and a11antoate are the major transport forms of nitrogen in many legumes such as soybean, cowpea and french bean. They are formed in the nodules of these plants by de novo pathways of purine synthesis and oxidation. The exact quantity of ureide present is dependent on environmental and developmental factors. Ureides are transported to sites of metabolism and allantoin is degraded, via allantoate and ureidoglycolate, to ultimately release ammonia, carbon dioxide and glyoxylate. The question of whether urea or ammonia and carbon dioxide are products, and the role of urease, in this cat

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26

Biggs, Ian Maxwell. "An investigation of sugarcane nitrogen physiology : sources, uptake, and metabolism /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17647.pdf.

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27

Larson, Tony Robert. "Storage lipid metabolism during nitrogen assimilation in a marine diatom." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq27184.pdf.

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28

Frick, Natasha Therese. "Nitrogen metabolism and excretion in the mangrove killifish, Rivulus marmoratus." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56324.pdf.

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29

Kosma, Dylan K. "Interaction of cyanide with nitrogen metabolism in wheat (Triticum aestivum) /." Available to subscribers only, 2005. http://proquest.umi.com/pqdweb?did=1075707051&sid=17&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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30

Couper, Andrew David. "Aspects of nitrogen metabolism in temperate and tropical crab species." Thesis, University of Hull, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250833.

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31

Maltby, Susan A. "Nutritional regulation of splanchnic nitrogen and energy metabolism in cattle." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241630.

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32

Gorgens, Johann Ferdinand. "Quantitative yeast physiology and nitrogen metabolism during heterologous protein production." Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/16051.

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Dissertation (PhD)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: QUANTITATIVE YEAST PHYSIOLOGY AND NITROGEN METABOLISM DURING HETEROLOGOUS PROTEIN PRODUCTION By Johann F. Görgens The physiology and nitrogen metabolism of the yeast, Saccharomyces cerevisiae, during heterologous xylanase production in a defined medium was quantified by the comparison of isogenic yeast strains, whereby several potential limitations in the production of the heterologous xylanase could be identified. The presence of global sensing and regulatory mechanisms, by which the yeast is able to actively re

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33

Kasap, Murat. "Nitrogen Metabolism and Solvent Production in Clostridium Beijerinckii Nrrl B593." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28446.

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The onset of solvent production by the clostridia involves regulation at the transcriptional level. The signal triggering the onset has not been identified, but redox and energetic states have been suggested as possible factors. Because several solvent-producing clostridia, including Clostridium acetobutylicum and Clostridium beijerinckii, are nitrogen-fixing organisms and both nitrogen-fixation and alcohol production (n-butanol, isopropanol and ethanol) are reductant-dependent processes, the effect of nitrogen fixation on the onset and progression of solvent production in C. beijerinckii NRR

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34

Farmer, Ryan Michael. "Coordination of Carbon Dioxide and Nitrogen Metabolism in Rhodobacter sphaeroides." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1365519943.

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35

Qiao, ZhengDao. "Interactions between NO2 absorption and nitrogen metabolism in soyabean plants." Thesis, Qiao, ZhengDao (1998) Interactions between NO2 absorption and nitrogen metabolism in soyabean plants. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/51679/.

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NO2 is a common atmospheric pollutant. It can enter plants through leaf absorption and participate in general N metabolism to ameliorate N-deficiency in plants. However, NO2 exposure sometimes exerts detrimental effects on plant growth. The hypotheses to explain the mechanism of these detrimental effects have remained inconsistent. Besides formation of nitrate and nitrite as an additional N supply to plants, NO2 absorption by leaves also brings H+ into plants. Almost every process of nitrogen uptake and assimilation, (such as uptake of nitrate and ammonium, fixation of N2, absorption of NO

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36

Grantley-Smith, M. P. "Nitrogen cycling in growing cattle fed maize silage." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370353.

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37

Woodend, John J. "Genetic and physiological studies on potassium and nitrogen uptake and utilization in wheat." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27653.

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Experiments were undertaken to examine the extent of variation for potassium and nitrogen uptake and utilization in wheat and also to address some issues of relevance to the improvement of these traits. These issues included the inheritance of these traits and the difficulties that could arise due to (1) the methodology that is used to measure ion fluxes and utilization, (2) ontogenetic variation in the expression of these traits, and (3) the growth stage at which nutrient utilization is evaluated. To compare varieties developed during different periods in the history of wheat breeding, the va

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38

Veivers, Pamela Christine. "Biochemical aspects of symbiosis in carbon and nitrogen metabolism in higher termites." Thesis, The University of Sydney, 1995. https://hdl.handle.net/2123/26814.

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A comprehensive study of carbon metabolism has been carried out on representatives of two genera of higher termites, Nasutitermes walkeri and the fungus gardeners, Macrotermes spp. Substantial activity of cellulase and its components endo-B-l,4—glucanase and B—glucosidase, was found in workers of N. walkeri, Macrotermes michaelseni M. subhyalinus, M. bellicosus and M. mulleri. Less activity was found in the soldiers and none in the larvae of the Macrotermes spp. In fungal material associated with Macrotermes spp. only the fungal nodules had significant enzyme activity. In N. walkeri and M. mic

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39

Chénier, Martin. "Impact of seasonal variations, nutrients, pollutants and dissolved oxygen on the microbial composition and activity of river biofilms." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85144.

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Biofilm communities were cultivated in rotating annular bioreactors using water from the South Saskatchewan River. The impacts of seasonal variations, nutrients, pollutants and dissolved oxygen on the activity and composition of the biofilms were assessed by using a combination of microcosm assays and molecular biology techniques.<br>The seasonal pattern in nitrification, denitrification and hexadecane mineralization, and in the occurrence of nirK in the South Saskatchewan River biofilms was: fall greater than winter, which was equivalent to spring. Hexadecane mineralization was higher

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40

Dunstan, R. H. "A GC-MS approach to carbon and nitrogen metabolism in Paracoccus denitrificans." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370248.

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41

Hutchins, David Allen. "Nitrogen and iron interactions in filamentous cyanobacteria." PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/3934.

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The investigations described in this paper are an attempt to further define and quantify the interrelationship of nitrogen fixation and iron nutritional physiology in these two species. Chapter II will present and compare data on nutritional ratios of field collected Trichodesmium colonies and laboratory Anabaena cultures, with the intent of examining possible correlations between observed iron levels and protein nitrogen and chlorophyll concentrations, as well as nitrogen fixation rates. Chapter Ill is an examination of nitrogen fixation and siderophore production in Anabaena with emphasis on

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42

Mikhael, Marc Raymond. "The role of nitrogen monoxide in macrophage and reticulocyte iron metabolism." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66688.

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The human body contains about three to four grams of iron, a metal of vital importance for almost all forms of life. The majority of body iron is used by developing red blood cells for hemoglobin production. Macrophages digest senescent red blood cells, break down heme and then return heme-derived iron to the circulation. Macrophages also produce an immense amount of reactive oxygen species, including nitrogen monoxide (NO), which in turn severely reduces pathogen vitality and proliferation, in response to inflammatory stimuli. In addition, to its cytotoxic effects on pathogens and

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43

Holder, Vaughn B. "THE EFFECTS OF SLOW RELEASE UREA ON NITROGEN METABOLISM IN CATTLE." UKnowledge, 2012. http://uknowledge.uky.edu/animalsci_etds/6.

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The objective of this research was to investigate the effects of slow release urea on N metabolism in cattle. The ruminal behavior of Optigen®II and the effect of basal diet on the in situ degradability of urea and Optigen®II were evaluated. The effect of slow release urea and its interaction with degradable intake protein (DIP) level in the diet on N retention and excretion was evaluated utilizing 8 Holstein steers in a 4 x 4 Latin square experiment. In addition, the effect of slow release urea and DIP level on ruminal and systemic urea kinetics was evaluated using stable isotope techniques w

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44

Pedro, Roig Laia. "GlnK regulatory proteins and their role in Haloferax mediterranei nitrogen metabolism." Doctoral thesis, Universidad de Alicante, 2012. http://hdl.handle.net/10045/27319.

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45

Burity, Helio Almeida. "Nitrogen fixation, transfer and competition in alfalfa-grass mixtures." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=73959.

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46

Rius, Agustin Gregorio. "Nitrogen Efficiency and Regulation of Protein Synthesis in Lactating Dairy Cows." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/37780.

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Dairy herds are major contributors to N pollution because 70% of the N intake is lost to the environment and 30% or less is retained in milk protein. Plasma amino acids (AA) that are not used for protein synthesis in mammary glands (MG) are catabolized in post splanchnic tissues (liver plus gastrointestinal tract, pancreas, spleen, portal system, and associated adipose tissue) and two thirds of the net supply of essential AA (EAA) are cleared in splanchnic tissues. Thus, increasing AA capture in MG would be expected to reduce AA catabolism and thereby increase efficiency of AA utilization.

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47

GNUGNOLI, MARCO. "GLUTAMATE, A NUTRIENT AT THE CROSS-ROAD OF CARBON AND NITROGEN ASSIMILATION." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241135.

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Ogni organismo vivente necessita di una regolazione stringente della propria crescita a seconda dell’ambiente che lo circonda. Ciò è vero a partire dai microorganismi unicellulari fino ad arrivare ai mammiferi. Comprendere questa regolazione è cruciale sia per la ricerca biologica di base che per le sue applicazioni, dalle fermentazioni industriali alla scienza medica. Il lavoro contenuto in questa tesi è focalizzato sul lievito gemmante Saccharomyces cerevisiae e sull’analisi del suo metabolismo all’interfaccia tra carbonio e azoto. S. cerevisiae è in grado di crescere utilizzando different

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48

Beltran, Casellas Gemma. "Effect of low temperature fermentation and nitrogen content on wine yeast metabolism." Doctoral thesis, Universitat Rovira i Virgili, 2005. http://hdl.handle.net/10803/8651.

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Les fermentacions a baixes temperatures (13ºC o inferiors) són interessants en l'elaboració de vins blancs i rosats, ja que augmenten la retenció i la producció dels aromes, i per tant la qualitat del producte final. Però aquestes baixes temperatures també tenen certs desavantatges, com una disminució en la velocitat de consum de sucres, obtenint fermentacions més llargues i amb risc de parades.<br/>Per intentar millorar el procés fermentatiu i la qualitat del producte final es van fixar els següents objectius:<br/>- L'estudi del metabolisme del llevat a baixes temperatures de fermentació (13º

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Sinclair, Liam Archibald. "Energy and nitrogen synchronisation and its effect on rumen metabolism in sheep." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303959.

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Davis, Daniel. "A study of nitrogen metabolism and lipopeptide biosurfactant production by Bacillus species." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394224.

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