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Dissertations / Theses on the topic 'Hydraulic conductance'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Agyei, Festus O. "TEMPORAL AND SPATIAL VARIABILITY OF RIVERBED CONDUCTANCE AT THE BOLTON WELLFIELD ALONG THE GREAT MIAMI RIVER, SOUTHWEST OHIO." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1166069378.

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2

Lamkey, Nick C. "DELINEATING CAPTURE ZONES USING A SYSTEMATIC SENSITIVITY ANALYSIS THAT VARIES RECHARGE, HYDRAULIC CONDUCTIVITY AND CONDUCTANCE." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2386.

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The Saline Valley Conservancy District (SVCD) formed in 1980 to provide groundwater to communities in Saline and Gallatin, Counties, Illinois. Sulfate contamination from a nearby coal mine threatens the SVCD’s current well field. Three of the wells are reaching the end of their service and have elevated levels of sulfate. This study investigated multiple well configurations on three different parcels of land to find possible new well locations that do not recharge water directly from the mine site over a 50-year period. A steady-state finite difference groundwater flow model was created using

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3

Rzigui, Touhami. "Analyse de la réponse d’un mutant mitochondrial de Nicotiana sylvestris au manque d’eau." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112144/document.

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Pour étudier le rôle de la mitochondrie dans la tolérance à la sécheresse, la réponse à la contrainte hydrique a été comparée entre une lignée sauvage (WT) et un mutant CMSII (Cytoplasmic Male Sterile) de Nicotiana sylvestris. Chez le mutant CMSII, le complexe I mitochondrial est absent et la respiration est assurée par les NAD(P)H déshydrogénases alternes et elle est maintenue à un niveau supérieur de l’ordre de 20 à 30% à celui du WT. La différence observée entre les plantes WT et CMSII met en jeu non seulement le fonctionnement mitochondrial, mais également le fonctionnement des chloroplast

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4

Lorentzon, Martin. "Grundvattenmodellering i Badelundaåsen." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88903.

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<p>Over an extended period of time there have been plans to establish a shared facility in Lennheden to extract groundwater from the Badelunda esker to provide drinking water for the cities of Borlänge and Falun. The city of Falun is dissatisfied with the quality of its drinking water and the city of Borlänge is concerned about the risk of contamination of its existing groundwater supply at its current location. To provide a basis for a decision on this issue, the company Midvatten AB has been commissioned to perform hydrogeological investigations in the area of Lennheden.</p><p>The purpose of

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5

Idris, Omonigho. "Temporal variability of riverbed conductance at the Bolton Well Field along the Great Miami River, Southwest Ohio: Characterization of riverbed sediments during low-flow conditions." Oxford, Ohio : Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1146764820.

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6

Ocheltree, Troy W. "Growth and survival during drought: the link between hydraulic architecture and drought tolerance in grasses." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13803.

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Doctor of Philosophy<br>Department of Agronomy<br>P.V. Vara Prasad<br>The pathway for the movement of water through plants, from the soil matrix to the atmosphere, constitutes the hydraulic architecture of a plant. The linkage between the hydraulic architecture of woody plants and drought tolerance has received considerable attention, but much less work has been done on grasses. I investigated the linkage between the hydraulic architecture of grasses to physiological patterns of water use across a range of species and conditions. The rate of stomatal conductance (g[subscript]s) and photosyn

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7

Reis, Karina Lima. "Desenvolvimento de um método para estimativa da condutância hidráulica e avaliação da atividade de aquaporinas em plântulas de milho." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-28082013-105742/.

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O transporte de água nas plantas é um processo complexo e que envolve a passagem por membranas celulares. Nelas existem aquaporinas, proteínas integrais de membrana, que facilitam o fluxo passivo de água e pequenos solutos. Um fator importante que influencia o transporte de água nas plantas é a condutância hidráulica radicular (LPr), que pode contribuir com até 50% de toda a resistência ao fluxo de água na planta. Várias metodologias são propostas para estimar a LPr, porém os dados obtidos são altamente variáveis, ainda que para a mesma espécie vegetal. Diante do exposto, pretende-se desenvolv

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8

Rossdeutsch, Landry. "Contribution du métabolisme de l'ABA et de la conductivité hydraulique à la réponse de la transpiration en situation de contrainte hydrique chez la Vigne : Variabilité génétique et effets du greffage." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0256/document.

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Dans le contexte de changement climatique, la compréhension des mécanismes régissant les pertes en eau de la vigne peut permettre d'adapter le matériel végétal pour maintenir la productivité de la vigne et la qualité du vin. L'adaptation à la sécheresse est un caractère complexe faisant intervenir des mécanismes physiologiques liés aux génotypes du greffon et du porte-greffe. Mais les effets du porte-greffe sur la régulation stomatique du greffon sont mal connus. La production par les racines de signaux chimiques tels que l'ABA et/ou hydraulique pourraient y contribuer. La réponse physiologiqu

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9

Oliveira, Tatiane Alexandre de. "Avaliação da estabilidade da aplicação de um híbrido experimental em diferentes concentrações sobre a dentina sensível - in vitro." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23134/tde-04032017-121932/.

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O objetivo deste estudo foi avaliar, in vitro, quantitativamente e qualitativamente, a estabilidade de um híbrido experimental em duas concentrações diferentes (concentrado e diluído) aplicado sobre a simulação de uma dentina sensível. Dentes molares humanos foram selecionados e tiveram suas coroas seccionadas abaixo do sulco oclusal de forma a obter espécimes de discos de dentina que foram planificados e polidos até atingirem a espessura de 1,0 milímetro. Os espécimes foram divididos em 4 grupos (n=9) de acordo com os tratamentos de superfície propostos: saliva artificial (SAL), adesivo denti

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10

Inman, William W. "Hydraulic resistance a determinant of short term stomatal conductance signaling in disparate xylem anatomy of Red Maple (Acer rubrum L.) and Shumard Oak (Quercus shumardii Buckl.) /." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181251213/.

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11

Pantin, Florent. "Ontogenèse des déterminismes hydrauliques et métaboliques de la croissance foliaire chez Arabidopsis thaliana." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20145.

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La performance d'une plante repose en partie sur sa capacité à capturer l'énergie lumineuse via la croissance foliaire. La littérature souligne deux limitations majeures de la croissance, de nature métabolique ou hydraulique. Nous testons ici l'hypothèse originale que l'importance relative de ces deux limitations est structurée par l'ontogenèse de la feuille chez Arabidopsis thaliana. Nous montrons que la disponibilité en carbone restreint la croissance des jeunes feuilles, tandis qu'une compétition hydraulique entre croissance et transpiration s'accroît au cours de l'ontogenèse. La mise en pl

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12

Di, Filippo Marina. "Influencia de seis portainjertos de vid sobre el comportamiento vitícola de la cv. Malbec y estudio de las relaciones hídricas que se establecen." Master's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias, 2008. http://bdigital.uncu.edu.ar/5048.

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El uso de portainjertos en la vid se ha difundido por su resistencia a filoxera y nemátodos, pero también por su tolerancia a condiciones adversas del suelo. Por otro lado, los portainjertos modifican las relaciones fuente-destino, influyendo en el comportamiento vegetativo y reproductivo de las plantas y en la composición de la uva, lo cuál puede ser utilizado como una herramienta de manejo agronómico. A fin de evaluar si existe un comportamiento diferencial de los portainjertos en cuanto a expresión vegetativa, vigor, rendimiento y composición de la uva, y explicar dichas diferencias en térm

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13

Bleby, Timothy Michael. "Water use, ecophysiology and hydraulic architecture of Eucalyptus marginata (jarrah) growing on mine rehabilitation sites in the jarrah forest of south-western Australia." University of Western Australia. School of Plant Biology, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0004.

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[Truncated abstract. Please see the pdf format for the complete text. Also, formulae and special characters can only be approximated here. Please see the pdf version for an accurate reproduction.] This thesis examines the water use, ecophysiology and hydraulic architecture of Eucalyptus marginata (jarrah) growing on bauxite mine rehabilitation sites in the jarrah forest of south-western Australia. The principal objective was to characterise the key environment and plant-based influences on tree water use, and to better understand the dynamics of water use over a range of spatial and tempo

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14

Jinagool, Wanploy. "Variabilité génétique de la tolérance à la sécheresse d'arbres d'intérêts agronomiques : rôle de la vulnérabilité à la cavitation du xylème." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22575/document.

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Dans un contexte de changements climatiques, le stress hydrique et la gestion de l'eau sont considérés comme une contrainte importante pour le secteur agricole. Ainsi la sélection pour la tolérance à la sécheresse est devenue un objectif majeur pour de nombreux programmes de sélection. La vulnérabilité à la cavitation est considérée comme un trait d'intérêt pour la sélection à une sécheresse extrême, en particulier pour les plantes ligneuses. Pourtant, l'étendue de sa variabilité et sa relation avec la tolérance à la sécheresse sont mal documentées à l’échelle intra-spécifique, et en particuli

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15

Bataille, Camille. "Topographie multi-échelle et fuite évolutive d'un contact coulissant : approche expérimentale et simulation." Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2020. http://www.theses.fr/2020UPHF0008.

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Les pompes permettent le transfert d’un produit (colle, lubrifiant, essence, etc.) jusqu’au système de pulvérisation sous pression. Etant présentes dans une multitude de secteur d’activité, leur fiabilité a une importance majeure pour la protection de l’environnement et de la santé. Nous étudions l’impact de l’état de surface sur la fonctionnalité (étanchéité, usure) de différents systèmes, au sein des pompes et systèmes de pulvérisation. Une méthode de caractérisation multi-échelle est ainsi mise en place afin de comprendre l’impact de l’état de surface des pièces sur la fonctionnalité de ces

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16

Schmitz, Juliano. "Architecture de la pousse de pommier en réponse à des températures hivernales froides et douces : typologie de la ramification axillaire au printemps et relation avec le statut hydrique du bourgeon pendant l'hiver précédent." Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0040/document.

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Le pommier (Malus Xdomestica Borkh.) cultivé en climat à hiver doux, avec un manque d'une quantité suffisante d'heures de températures froides, présente des anomalies morphologiques et physiologiques. Sur le plan de la phénologie, il s'agit notamment d'un débourrement printanier tardif et désynchronisé entre les différents bourgeons d'un même arbre. Sur le plan agronomique, la floraison et la nouaison sont irrégulières et étalées dans le temps et conduisent à une faible production de fruits. L'objectif de ce travail de thèse est premièrement de mieux caractériser les effets des températures hi

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17

Canova, Giovana Calicchio. "Estudo in vitro do efeito de agentes anti-hiperestésicos na permeabilidade dentinária por meio de testes de condutividade hidráulica e de espectroscopia de impedância eletroquímica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25138/tde-09112007-100638/.

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O objetivo do presente estudo foi quantificar, in vitro, a permeabilidade da dentina tratada com dois agentes anti-hiperestésicos à base de oxalato e um à base de fosfato de cálcio, por meio de testes de condutividade hidráulica e de espectroscopia de impedância eletroquímica e, ainda, determinar se espectroscopia de impedância eletroquímica pode ser considerada um método alternativo para avaliar a capacidade obstrutiva de agentes antihiperestésicos. Para o teste de condutividade hidráulica foram utilizados vinte quatro discos de dentina, obtidos de terceiros molares humanos extraídos, que for

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18

Ben, Baaziz Khaoula. "Modulation de la conductivité hydraulique foliaire par la lumière chez le Noyer (Juglans regia) : approches écophysiologique et moléculaire." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00735808.

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La conductivité hydraulique foliaire (KF) est une composante majeure du transport d'eau dans toute la plante. Dans les feuilles de noyer, la KF est stimulée à la lumière et est étroitement liée à l'accroissement du taux des transcrits d'aquaporines JrPIP2s. Par ailleurs, la corrélation entre la stimulation de la KF et des transcrits d'aquaporines à la lumière, n'est pas générale et dépend de l'espèce. Ici, nous étudions cette corrélation chez cinq espèces forestières (Juglans regia, Fagus sylvitica, Quercus robur, Salix alba et Populus tremula) différant par leur réponse à la lumière. Nous dém

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19

Fiala, Petr. "Tepelně-hydraulický a pevnostní výpočet výměníku tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228941.

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Main object of the work is stress analysis of specific parts of tube and shell heat exchanger by using MKP. Each part is judged by two different computation methods. The method based on computation values and the method nearing real condition of operation of device. To approach real load are in the work made basic heat transfer computations for entire device and for analyzed part are computed boundary conductance by using CFD.

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20

Schmitz, Juliano Dutra. "Arquitetura da macieira em regimes térmicos hibernais contrastantes - tipologia da ramificação primaveril e sua relação com o estado hídrico de gemas durante o inverno." Universidade Federal de Pelotas, 2014. http://repositorio.ufpel.edu.br:8080/handle/prefix/3021.

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Submitted by Gabriela Lopes (gmachadolopesufpel@gmail.com) on 2016-09-14T18:22:14Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Tese Juliano Dutra Schmitz.pdf: 9582623 bytes, checksum: f579b0458e2ab6f4ae5579715de842ea (MD5)<br>Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2016-09-15T19:46:43Z (GMT) No. of bitstreams: 2 Tese Juliano Dutra Schmitz.pdf: 9582623 bytes, checksum: f579b0458e2ab6f4ae5579715de842ea (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 20

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21

Blackman, CJ. "Leaf hydraulics: Implications for understanding leaf structure and function, drought resistance and community assembly." Thesis, 2011. https://eprints.utas.edu.au/12270/1/Front-Chris_Blackman.pdf.

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The leaf hydraulic system in plants is charged with supplying water to the sites of evaporation in order to facilitate photosynthesis and growth, while simultaneously resisting negative pressure generated under tension induced by water stress. These processes contribute substantially to the enormous variation in leaf structure and function found across vascular plants and may contribute in fundamental ways to plant function and differences in species ecological strategy. In this dissertation I examined the leaf hydraulic properties of a phylogenetically, morphologically and ecologically divers

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22

Vandeleur, Rebecca. "Grapevine root hydraulics: the role of aquaporins." Thesis, 2008. http://hdl.handle.net/2440/57505.

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Hydraulic conductance of roots of the grapevine cultivar, Chardonnay, varies diurnally, peaking at 1400 h. The diurnal amplitude of hydraulic conductance between 600 and 1400 h was not altered when potted grapevines were water-stressed by withholding water for 8 days. However, the diurnal change was greatly reduced for water-stressed Grenache. If the diurnal change in root hydraulic conductance is a result of changes in aquaporin gene expression or activity, it suggests that aquaporins respond differently in water-stressed Chardonnay and Grenache roots. Both Chardonnay and Grenache demonstrate

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23

Vandeleur, Rebecca. "Grapevine root hydraulics: the role of aquaporins." 2008. http://hdl.handle.net/2440/57505.

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Hydraulic conductance of roots of the grapevine cultivar, Chardonnay, varies diurnally, peaking at 1400 h. The diurnal amplitude of hydraulic conductance between 600 and 1400 h was not altered when potted grapevines were water-stressed by withholding water for 8 days. However, the diurnal change was greatly reduced for water-stressed Grenache. If the diurnal change in root hydraulic conductance is a result of changes in aquaporin gene expression or activity, it suggests that aquaporins respond differently in water-stressed Chardonnay and Grenache roots. Both Chardonnay and Grenache demonstrate

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24

Creek, Danielle. "Understanding the coordination of hydraulic strategies with other traits in determining plant survival under drought." Thesis, 2018. http://hdl.handle.net/1959.7/uws:51341.

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Drought negatively impacts plant growth and survival. The ability to maintain hydraulic functionality during water stress strongly influences whether plants will survive and recover from drought. Although our understanding of the mechanisms underlying drought-induced mortality have improved in recent decades, our understanding of the coordination between stomatal and hydraulic traits and their role in shaping drought resistance and enabling recovery remains poorly understood. In this thesis, I examined plant hydraulic traits across a range of contrasting species in order to better understand h

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25

Jimenez-Casas, Marcos. "Effects of NaCl on growth and physiology of Pinus leiophylla seedlings." Phd thesis, 2009. http://hdl.handle.net/10048/446.

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Identification of salt- resistant tree species and genotypes is needed for rehabilitation of lands affected by salinity in Mexico. This dissertation consists of four studies for analyzing the responses of Pinus leiophylla seedlings to salt. In the first study, resistance to salt stress was studied in six-month-old seedlings from eight different sources of seed collected from the areas with contrasting precipitation levels. Plants from the xeric areas were shorter and had smaller stem diameters but were less sensitive to salt stress and recovered faster from salt injury compared with the plants

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26

Shaw, Ruth Elizabeth. "Plant waterlogging: causes, responses, adaptations and crop models." Thesis, 2015. http://hdl.handle.net/2440/94087.

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Waterlogging has been reported to reduce crop yields by up to 80 %, although the lack of a consistent definition of waterlogging or specific effects on plants makes it hard to accurately ascribe crop yield losses to waterlogging relative to other abiotic stresses. After reviewing the available literature I suggest that recording soil profile information, topographic data, meteorological information, plant morphological appearance and areas with visible surface water are the most important factors for describing waterlogging in the field. An above ground plant response to waterlogging that is e

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27

ABATE, ELISA. "Water content as useful tool for predicting the risk of drought-induced plant mortality." Doctoral thesis, 2021. http://hdl.handle.net/11570/3212612.

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This Thesis provides experimental evidences about the reliability of the relative water content to predict the drought-driven vegetation die-off and die-back. In the Introduction, I briefly discussed on the effects of global climate changes on plant fitness and survival, focusing on unresolved questions for identifying reliable indicator of plant mortality, a key issue to perform reliable plant mortality risk models and to realize vegetation monitoring programs. In a first study, I recorded a significant impact of leaf water content and membrane damages on the impairment as well as on the

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28

Kort, John. "Hydraulic and canopy conductances in hybrid poplar clones." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=232746&T=F.

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