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Дисертації з теми "Urease inhibition"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Frame, William Hunter. "Ammonia Volatilization, Urea Hydrolysis, and Urease Inhibition with the Application of Granular Urea in Agroecosystems." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/37598.

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Synthetic nitrogen (N) fertilizers play a key role in human nutrition and crop production. The most widely used N source globally is urea; however, N loss via ammonia volatilization can be great in agricultural systems where urea is surface-applied. The objectives of the experiments reported in this dissertation were: 1) evaluate the performance of a new laboratory ammonia volatilization measurement system for measuring ammonia volatilization from coated granular urea; 2) determine if urease can be extracted from corn and soybean residues; 3) determine if differences in urease activity are p

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2

Mazzei, Luca <1986&gt. "Biochemical and Structural Studies on Urease Inhibition. A Nickel-Dependent Virulence Factor." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8032/1/Mazzei_Luca_tesi.pdf.

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Urease is a nickel-dependent enzyme that catalyses the rapid hydrolysis of urea, determining an overall increase of pH and causing negative consequences for human health as well as agriculture. For these reasons, the scientific community has devoted intense efforts in the last several decades for the development of efficient and specific inhibitors of urease able to counteract its negative effects. In this study, a combination of kinetic experiments, carried out using calorimetry and spectrophotometry, and X-ray protein crystallography has been applied to the urease system to determine the in

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3

Hassounah, Hany [Verfasser], M. [Akademischer Betreuer] Pietzsch, K. [Akademischer Betreuer] Humbeck, and C. [Akademischer Betreuer] Syldatk. "Investigations on the phylogenetic diversity of urease producing bacteria in soil, the inhibition of urea active transportation and metabolizing in Bacillus megaterium DSM 90 / Hany Hassounah. Betreuer: M. Pietzsch ; K. Humbeck ; C. Syldatk." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2010. http://d-nb.info/102493750X/34.

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4

Dawar, Khadim M. "The impacts of urease inhibitor and method of application on the bioavailability of urea fertiliser in ryegrass (Lolium perenne L.)." Thesis, University of Canterbury. School of Biological Sciences, 2010. http://hdl.handle.net/10092/5193.

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The use of urea fertiliser has been associated with relatively poor nitrogen (N) use efficiency (NUE) due to heavy N losses such as gaseous emissions of ammonia (NH₃) and nitrous oxide (N₂O) and nitrate (NO₃⁻) leaching into surface and ground waters. Improving N use-efficiency of applied urea is therefore critical to maximise its uptake and to minimise its footprint on the environment. The study was conducted under laboratory-glasshouse conditions (Chapter 2-4)and lysimiter-field plot studies (Chapter 5). In chapter 2, Two glasshouse-based experimentswere conducted to investigate the potential

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5

Dias, Marylene. "Cytokinines de la famille des n-phenyl-n-pyridylurees : synthèse d'analogues et étude photolytique d'un dérivé azido." Angers, 1994. http://www.theses.fr/1994ANGE0005.

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Dans l'espoir de mettre en évidence une activité anticytokinine dans les dérivés des n-phenyl-n-pyridylurees, 10 molécules, 9 urées et un carbamate, analogues structuraux de la n-benzyl-n-(2,6-dichloropyrid-4-yl) urée ont été synthétisés. Ces composés ont été obtenus par réaction de pyridylisocyanates ou de pyridylcarbamates avec des dérivés amines ou l'alcool benzylique. Nous avons par ailleurs mis en évidence l'impossibilité d'obtenir des urées par réaction des 4-amino-pyridines 2-substituées et de l'isocyanate de benzyle à cause de réactions secondaires. Les tests biologiques ont montré que

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6

Faria, Letícia de Abreu. "Dinâmica do nitrogênio proveniente de ureia combinada a tecnologias redutoras de volatilização." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-02042013-132618/.

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A aplicação de ureia em manejos conservacionistas favorece a ocorrência de elevadas perdas por volatilização de NH3. Novas fontes nitrogenadas ou processos que possam ser aplicados à ureia têm sido pesquisados a fim de reduzir esse tipo de perda. Considerando as questões: O uso móvel do coletor semi-aberto exige a alteração das equações de ajuste, que foram desenvolvidas a partir de seu uso na forma estática? Há menor perda de N por volatilização, e influência o estado nutricional, qualidade e a produtividade da cultura com a agregação de tecnologias à ureia, como o revestimento com zeolita ou

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7

Marcondes, Angela Lemos Prestes. "Volatilização de amônia de adubos nitrogenados sob diversas condições ambientais na cultura do milho." Universidade Estadual do Oeste do Paraná, 2007. http://tede.unioeste.br:8080/tede/handle/tede/1276.

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Made available in DSpace on 2017-07-10T17:37:05Z (GMT). No. of bitstreams: 1 Angela Lemos Prestes Marcondes.pdf: 484682 bytes, checksum: 74c71be734cb296a788fd1e8a2cf9d0d (MD5) Previous issue date: 2007-02-02<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Experiments in laboratory and house of vegetation with two ground, one of arenaceous texture (PVAd) and another argillaceous one had been developed (NVdf), beyond a study the field, having for objective to evaluate the agronomic effectiveness of the nitrogen fertilization, evaluating losses of N for volatilization of d

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8

Reinhardt-Hanisch, Annett. "Grundlagenuntersuchungen zur Wirkung neuartiger Ureaseinhibitoren in der Nutztierhaltung." Stuttgart : Selbstverl, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:100-opus-3028.

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9

Sunderlage, Brent. "LATE APPLICATION NITROGEN ON CORN IN SOUTHERN ILLINOIS AND SOIL PROPERTIES AFFECTING AMMONIA VOLATILIZATION FROM UREA FERTILIZER." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2154.

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AN ABSTRACT OF THE THESIS OF BRENT C. SUNDERLAGE, for the Master of Science degree in Plant, Soil, and Agricultural Systems, presented on March 8, 2017, at Southern Illinois University Carbondale. TITLE: LATE APPLICATION NITROGEN ON CORN IN SOUTHERN ILLINOIS AND SOIL PROPERTIES AFFECTING AMMONIA VOLATILIZATION FROM UREA FERTILIZER MAJOR PROFESSOR: Dr. Rachel L. Cook In corn (Zea mays L.) production systems, typical nitrogen fertilization occurs either before planting or after crop emergence, as late as the V6 stage. Since the majority of nitrogen uptake does not occur until V10 through R1,

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10

Wallace, Ashley J. "The effect of environment, soil type and farm system management on nitrogen use efficiency and nitrous oxide emissions from cereal crops in south eastern Australia." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232432/1/Ashley_Wallace_Thesis.pdf.

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This thesis outlines findings from a series of field experiments measuring the efficiency with which wheat and barley crops grown in south eastern Australia utilise nitrogen (N) fertiliser, with particular focus on loss of N as emissions of the greenhouse gas: nitrous oxide. N use efficiency varied significantly across regions, seasons and management strategies, while nitrous oxide emissions were highest in high rainfall environments or under irrigation compared with lower rainfall environments. Strategies which match the rate and timing of fertiliser application to crop demand resulted in gre

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11

Mbianda, Johanne. "Protein Surface Recognition with Urea-based foldamers : application to the design of ligands targeting histone chaperone proteins." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0184.

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Avec 8,8 millions de décès dénombrés en 2015, le cancer est l’une des plus grandes causes de mortalité dans le monde. De nouvelles stratégies thérapeutiques ont émergé et l’identification de nouvelles cibles biologiques comme notamment la protéine Asf1, un chaperon d’histone H3-H4 surexprimée dans les cellules cancéreuses et en particulier le cancer du sein. Cette protéine possède différentes fonctions dans la cellule et agit à plusieurs endroits par des interactions protéine-protéines. Au cours de cette thèse de doctorat, nous avons développé une stratégie originale de design d’inhibiteurs d’

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12

Moreira, Lílian Angélica. "Ureia estabilizada na adubação nitrogenada de cana-de-açúcar." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-03082017-111836/.

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A adubação nitrogenada de soqueira de cana-de-açúcar no Brasil normalmente é feita no período seco do ano e a principal fonte de N é o nitrato de amônio, apesar de a ureia ser o principal fertilizante nitrogenado consumido no Brasil e no mundo. Para viabilizar o uso de ureia em áreas de cana-de-açúcar colhida sem queima, com grande quantidade de palha recobrindo o solo, devem ser adotadas estratégias que reduzam as perdas de amônia por volatilização, como uso de ureia estabilizada com inibidores de urease. Trabalhos prévios indicaram a necessidade de aumentar a concentração do inibidor de urea

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13

Bobrowski, Anna Barbara Verfasser], Eberhard [Akademischer Betreuer] [Hartung, and Thomas [Gutachter] Amon. "Reduction of ammonia emissions by applying a urease inhibitor in dairy livestock systems / Anna Barbara Bobrowski ; Gutachter: Thomas Amon ; Betreuer: Eberhard Hartung." Kiel : Universitätsbibliothek Kiel, 2020. http://nbn-resolving.de/urn:nbn:de:gbv:8-mods-2020-00505-4.

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14

Bobrowski, Anna Barbara [Verfasser], Eberhard [Akademischer Betreuer] Hartung, and Thomas [Gutachter] Amon. "Reduction of ammonia emissions by applying a urease inhibitor in dairy livestock systems / Anna Barbara Bobrowski ; Gutachter: Thomas Amon ; Betreuer: Eberhard Hartung." Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1223925307/34.

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15

Mira, Acácio Bezerra de. "Increasing NBPT rates to reduce ammonia volatilization losses from urea applied over sugarcane straw." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-09082016-152120/.

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Urea is the main nitrogen (N) fertilizer used worldwide, but N losses in the form of ammonia (NH3) is a major problem when this fertilizer is topdressed over crop residues. The treatment of urea with N-(n-butyl) thiophosphoric triamide (NBPT) decreases the activity of urease enzyme and volatilization losses in many crops. However, the amount of straw over the soil in green cane trash blanketing (GCTB) systems affect the effectiveness of NBPT-treated urea in reducing NH3 losses. The hypothesis of this study is that an increase of NBPT concentration in NBPT-treated urea above the commercial conc

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16

Chen, Tsung-han, and 陳琮漢. "Inhibition of Helicobacter pylori and associated urease by lactic acid bacteria." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/15107707474434015219.

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碩士<br>嘉南藥理科技大學<br>生物科技系暨研究所<br>99<br>Helicobacter pylori that infects over 50% of the population in world wide, has been linked to the development of gastric adeno-carcinoma and mucosa-associated lymphoid tissue lymphoma. Recently, lactic acid bacteria (LAB) has attracted much attention due to their potential inhibition of pathogen including H. pylori , Streptococcus mutans and Staphyloccus aureus. Therefore, the effects of lactic acid bacteria isolated from fermented vegetables on H.pylori were tested. A standard antimicrobial plate well diffusion assay was employed to examine inhibitory

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17

Lai, Chung-Peng, and 賴俊鵬. "The Study of Model Urease Correlated Ni(II) Complexes: Synthesis, Structure, Magnetic properties, and Inhibitions of Urease." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98691434213329904261.

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碩士<br>淡江大學<br>化學學系碩士班<br>98<br>A seiries nickel(II) complexes as functional model compounds were synthesized and characterized by X-ray single crystal diffraction, Infrared spectroscopy, element analyzer, and enzyme-linked immunosorbant assay. Nickel(II) complexes : (1) [Ni4(L1)4(H2O)4](DMF)3 (2) [Ni(2,6-pdca)2Ni(H2O)5](H2O)2 (3) [Ni(2,6-pdca)2Na2(H2O)5]n (4) [Ni(μ1,5-dca)2(DMF)2]n 　　　　H2L1 : 2-(3-methoxy-salicylideneamino)-benzyl-alcohol 　　　　2,6-pdca : 2,6-pyridinedicarboxylic acid 　　　　dca : sodium dicyanoamide There are found that complexes 1, 2, 3 and 4 are trteanuclear, dinuclear,

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18

Rawluk, Christine D. L. "Effect of soil texture, temperature and irrigation on the performance of urea fertilizers amended with the urease inhibitor N-(n-butyl) thiophosphoric triamide." 2000. http://hdl.handle.net/1993/19519.

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19

Jayatilake, K. A. K. "Studies on the nitrification inhibitor, "nitrapyrin" [2-chloro-6(trichloromethyl) pyridine] in relation to availability and transformation of nitrogen in soil." Thesis, 1988. https://eprints.utas.edu.au/20175/1/whole_JayatilakeKAK1990_thesis.pdf.

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Nitrification inhibitors have been claimed to offer a means of achieving better control of the delivery of applied fertilizer nitrogen to crops. However, considerable variability in reported usefulness of nitrification inhibitors indicates a need for further research on their effectiveness under different agricultural conditions. A series of experiments was conducted to examine effects of the nitrification inhibitor nitrapyrin [2-chloro 6-(trichloromethyl) pyridine] on soil N availability and transformation and the influence of certain factors (soil pH, relative mobility, temperature et

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20

Lewis, Jennifer Lynn. "Transfer efficiency by the subterranean termite Reticulitermes flavipes (Isoptera: Rhinotermitidae) of food-borne bait formulations containing benzoylphenyl urea chitin synthesis inhibitor." 2008. http://purl.galileo.usg.edu/uga%5Fetd/lewis%5Fjennifer%5Fl%5F200812%5Fphd.

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21

Baumann, Nicola. "Diagnostische Nachweisverfahren für Helicobacter pylori im Vergleich: Prospektive Untersuchung bei 132 Patienten der Universitätsmedizin Göttingen." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-F02F-3.

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22

Cherdchim, Banyat. "Actions of lignocellulolytic enzymes on Abies grandis(grand fir) wood for application in biofuel production." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B138-4.

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