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Dissertations / Theses on the topic 'Physiological limitations'

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1

Muniz-Pumares, Daniel. "Estimation of anaerobic capacity : practical limitations and physiological assumptions." Thesis, St Mary's University, Twickenham, 2016. http://research.stmarys.ac.uk/1063/.

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2

Prosser, Joanne Elizabeth. "Evaluation of new techniques in nuclear medicine : limitations imposed by physical and physiological factors." Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433112.

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3

Liu, Hung-Tsu (Paul). "Physiological limitations to the growth response of bean plants (Phaseolus vulgaris L.) to carbon dioxide enrichment." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30915.

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Previous studies on dwarf bean plants have found a very limited growth response to CO₂ enrichment (Jolliffe and Ehret, 1985; Ehret and Jolliffe, 1985b). There was no increase in leaf area, and leaf injury was observed after about three weeks of CO₂ enrichment (Ehret and Jolliffe, 1985a). Although dry weight was increased, the increase may be limited due to restricted carbon utilization (e.g. no increases in leaf area). In this study, non-photosynthetic limitations, such as the partitioning of dry matter among plant parts, the partitioning of carbon among photosynthetic end products, and the in
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4

Seidel, Melissa E. "Changes in a pollinator food web in the face of climate change: effects of physiological limitations and species interactions." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu156352945016303.

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5

Hamann, Fábio André [Verfasser]. "Potential and limitations for the practical use of fluorescence sensors to detect physiological adaptations of crops / Fábio André Hamann." Bonn : Universitäts- und Landesbibliothek Bonn, 2021. http://d-nb.info/1239730071/34.

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6

Guillaumot, Charlène. "Modelling the response of Antarctic marine species to environmental changes. Methods, applications and limitations." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/327073.

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Among tools that are used to fill knowledge gaps on natural systems, ecological modelling has been widely applied during the last two decades. Ecological models are simple representations of a complex reality. They allow to highlight environmental drivers of species ecological niche and better understand species responses to environmental changes. However, applying models to Southern Ocean benthic organisms raises several methodological challenges. Species presence datasets are often aggregated in time and space nearby research stations or along main sailing routes. Data are often limited in n
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7

Pedersen, Karen M. "LIMITATIONS OF HOST PLANT USE IN TWO ANDEAN ALTINOTE (NYMPHALIDAE, HELICONIINEA, ACRAEINI), BUTTERFLIES, FROM A TRITROPHIC PERSPECTIVE." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1430819995.

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8

Guillaumot, Charlène. "Modelling the response of Antarctic marine species to environmental changes. Methods, applications and limitations." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2021. http://www.theses.fr/2021UBFCK020.

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Parmi les outils qui permettent de mieux comprendre les systèmes naturels, la modélisation écologique a connu un essor particulièrement important depuis une vingtaine d’années. Les modèles écologiques, représentation simplifiée d’une réalité complexe, permettent de mettre en avant les facteurs environnementaux qui déterminent la niche écologique des espèces et de mieux comprendre leur réponse aux changements de l’environnement. Dans le cas des faunes marines antarctiques, la modélisation écologique fait face à plusieurs défis méthodologiques. Les jeux de données de présence des espèces sont tr
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9

Nichol, Alison Claire. "Water load : a physiological limitation to bumblebee foraging behaviour?" Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620933.

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10

Ostrowski, Martin Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Physiological adaptation to nutrient limitation in a marine oligotrophic ultramicrobacterium Sphingopyxis alaskensis." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/27422.

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Sphingopyxis (formerly Sphingomonas) alaskensis, a numerically abundant species isolated from Alaskan waters and the North Sea represents one of the only pure cultures of a typical oligotrophic ultramicrobacterium isolated from the marine environment. In this study, physiological and molecular characterization of an extinction dilution isolate from the North Pacific indicate that it is a strain of Sphingopyxis alaskenis, extending the known geographical distribution of this strain and affirming its importance as a model marine oligotroph. Given the importance of open ocean systems in climatic
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11

Poulton, Nicole Jane 1970. "Physiological and behavioral diagnostics of nitrogen limitation for the toxic dinoflagellate Alexandrium fundyense." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/91509.

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Thesis (Ph. D.)--Joint Program in Biological Oceanography (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), February 2001.<br>Includes bibliographical references.<br>by Nicole Jane Poulton.<br>Ph.D.
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12

Wu, Shing. "The occurrence of core muscle fatigue during high-intensity running exercise and its limitation to performance : the role of respiratory work." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1382.

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13

Müller-Jochim, Angelika [Verfasser]. "Nutritional limitation of iron and methionine. Physiological consequences and new evasion strategies in staphylococci. / Angelika Müller-Jochim." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1224882229/34.

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14

Mohammed, Kassem Ahmed Said. "Effect of nutrient limitation on physiological and morphological plant traits related to growth and quality of tomato." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2013. http://dx.doi.org/10.18452/16785.

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Ziel dieser Arbeit war es, das Verständnis über Reaktionen von Tomaten auf limitiertes Nährstoffangebot zu verbessern. In der Kontrollbehandlung (100% Biomassewachstum) wurden Pflanzen ohne Nährstofflimitierung kultiviert. Bei den Mangelvarianten wurde entweder K, Mg oder N kontinuierlich in Raten angeboten, die das Wachstum auf etwa 80% (leichter Mangel) oder 60% (starker Mangel) der Kontrolle reduzierten. Dieser Versuchsansatz ermöglichte es, pflanzliche Reaktionen auf eine gut definierte Intensität von Mangel an K, Mg und N zu vergleichen. Nährstofflimitierung veränderte die Biomasse- und
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15

Hippmann, Anna Angelika. "The physiological and proteomic response of two strains of the diatom Thalassiosira oceanica to copper and/or iron limitation." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/64139.

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Diatoms are responsible for over 20% of the Earth's photosynthetic productivity, thus impact global fisheries, biogeochemical cycles and climate. However, marine primary productivity is limited by the micronutrient iron (Fe) in ~40% of the ocean. Diatoms inhabiting these regions have evolved unique physiological strategies to survive under these extremely low Fe conditions. Several physiological adaptations to Fe-limitation in diatoms require an increased dependency on copper (Cu), suggesting an interaction between Fe and Cu nutrition and the potential for Fe-Cu co-limitation in these regions.
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16

Bhathena, Jasmine. "The physical and physiological effects of nitrogen and phosphorus limitation on a pulp and paper mill effluent biotreatment microbial community /." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80228.

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The influence of nitrogen (N) and phosphorus (P) limitation on pulp and paper mill activated sludge (AS) floc properties was studied using a bioreactor fed with synthetic Kraft mill effluent. The bioreactor and synthetic effluent were designed and shown to perform like the real mill system providing the AS, establishing the in vivo relevance of the results. Limitation of either N or P produced inadequate effluent biotreatment, shown by poor BOD5 and suspended solids removal, and by decreased biomass health, performance, and floc settling. Greatly enhanced poly-beta-hydroxybutyrate (PHB)
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17

Clark, Melinda Erin. "Physiological Analysis of Desulfovibrio vulgaris Hildenborough Under Conditions Relevant to the Subsurface Environment: Carbon and Energy Limitation and Biofilm Formation." Oxford, Ohio : Miami University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1218999819.

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18

Faoro, Vitalie. "Contribution à l'étude de la limitation de l'aptitude aérobie en hypoxie." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210536.

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On sait depuis longtemps que l’exposition à l’altitude est associée à une réduction de l’aptitude aérobie. Différentes hypothèses ont été posées pour expliquer cette limitation à l’effort en hypoxie (une limitation ventilatoire ou diaphragmatique, une altération de la diffusion pulmonaire et une disconcordance entre de la perfusion et la diffusion tissulaire, etc.) mais généralement, la limitation de l’effort aérobie en hypoxie est attribuée à une diminution du transport sanguin de l’O2 (TO2) parc convection vers les muscles. Le TO2 dépend du débit cardiaque (Q) et du contenu artériel en O2 (C
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19

Cheng, Hung-Yuan. "Right ventricular outflow limitation and capacity for exertion associated with age and iron status." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:d8621b88-c220-4ad5-bd69-ab23f9dcb9e3.

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This thesis is concerned with the role of iron in modulating right ventricular (RV) afterload during exercise in healthy people aged between 50 and 80 years. This is predicated on the requirement of the hypoxia-inducible factor (HIF) pathway for ferrous iron. A secondary objective is to examine the reactive oxygen species (ROS) hypothesis in human hypoxic pulmonary vasoconstriction (HPV) using exposure to hyperoxia. Chapters 3 and 4 describe basal relationships that may affect the HIF pathway and exercise capacity during ageing. These were explored in 113 participants using blood tests and exe
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20

Khalil, Feras [Verfasser], Stephanie [Akademischer Betreuer] Läer, and Jörg [Akademischer Betreuer] Breitkreutz. "Physiologically Based Pharmacokinetic Modeling in Pediatric Drug Development and Research: Methodology, Applications, and Limitations / Feras Khalil. Gutachter: Stephanie Läer ; Jörg Breitkreutz." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2014. http://d-nb.info/1060823640/34.

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21

Barron, Anthony. "Identifying the ideal cardiopulmonary exercise test variable to distinguish between the cardiovascular and respiratory components of functional limitation and to detect relevant physiological changes in function." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/25138.

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Cardiopulmonary exercise testing (CPX) is established for the investigation of cardiac disease. In patients with heart failure multiple variables have shown prognostic benefit, although peak VO2 remains the most widely used. It is accepted that peak VO2 is affected by respiratory disease as well, and may be highly susceptible to influence from respiratory disease coexistent with cardiac disease. I propose an alternative variable will show significantly greater specificity for cardiovascular disease when compared to peak VO2 (and other variables) and aim to identify this 'ideal' variable throug
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22

Mohammed, Kassem Ahmed Said [Verfasser], Christof [Akademischer Betreuer] Engels, Eckhard [Akademischer Betreuer] George, Saleh Ahmed [Akademischer Betreuer] Lotfy, and Ivan [Akademischer Betreuer] Paponov. "Effect of nutrient limitation on physiological and morphological plant traits related to growth and quality of tomato / Kassem Ahmed Said Mohammed. Gutachter: Christof Engels ; Eckhard George ; Ahmed Lotfy Saleh ; Ivan Paponov." Berlin : Humboldt Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2013. http://d-nb.info/1037774515/34.

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23

Mohammed, Kassem A. S. [Verfasser], Christof [Akademischer Betreuer] Engels, Eckhard [Akademischer Betreuer] George, Saleh Ahmed [Akademischer Betreuer] Lotfy, and Ivan [Akademischer Betreuer] Paponov. "Effect of nutrient limitation on physiological and morphological plant traits related to growth and quality of tomato / Kassem Ahmed Said Mohammed. Gutachter: Christof Engels ; Eckhard George ; Ahmed Lotfy Saleh ; Ivan Paponov." Berlin : Humboldt Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2013. http://nbn-resolving.de/urn:nbn:de:kobv:11-100211252.

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24

Huntington, Timothy Eugene. "Ecological and physiological limitations of carrion fly colonization of cadavers in terrestrial ecosystems." 2008. http://proquest.umi.com/pqdweb?did=1574152611&sid=5&Fmt=2&clientId=14215&RQT=309&VName=PQD.

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Thesis (Ph.D.)--University of Nebraska-Lincoln, 2008.<br>Title from title screen (site viewed Jan. 13, 2009). PDF text: vi, 62 p. : ill. ; 2 Mb. UMI publication number: AAT 3315321. Includes bibliographical references. Also available in microfilm and microfiche formats.
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25

Hopkins, Susan R. "Pulmonary diffusion limitation, V̇ /Q̇ mismatch and pulmonary transit time in highly trained athletes during maximal exercise." Thesis, 1992. http://hdl.handle.net/2429/2620.

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To investigate the relationship between pulmonary diffusion limitation, ventilation-perfusion (VA/Q) mismatch, pulmonary transit times (PTT) and pulmonary gas exchange during exercise, 10 highly trained male athletes (age=26.4±4.4 years, Height=185.5±5.3cms, Weight=78.2±8.6 kg, V 02max=5.15±0.521-min-1) under went exercise testing at rest (R) and 150W, 300W and maximal exercise (372±22W), corresponding to an oxygen consumption (V0₂) of 0.41±0.09, 2.16±0.17, 4.32±0.35 and 5.13±0.50 1-min-1respectively, while trace amounts of six inert gases were infused via a peripheral vein. Arterial blood sam
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