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Dissertations / Theses on the topic 'Relative Water Content (RWC)'

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1

Vanderbilt, Vern C., Craig S. T. Daughtry, Meredith K. Kupinski, et al. "Estimating the relative water content of leaves in a cotton canopy." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/626493.

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Remotely sensing plant canopy water status remains a long term goal of remote sensing research. Established approaches to estimating canopy water status - the Crop Water Stress Index, the Water Deficit Index, the Equivalent Water Thickness and the many other indices - involve measurements in the thermal or reflective infrared. Here we report plant water status estimates based upon analysis of polarized visible imagery of a cotton canopy measured by Ground Multiangle SpectroPolarimetric Imager (GroundMSPI). Such estimators potentially provide access to the plant hydrological photochemistry that
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2

Sulaiman, Z. A. B. "A gamma-ray study of spatial and temporal variation in relative water content of tree stem." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382290.

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3

Gribble, Karleen D., of Western Sydney Hawkesbury University, and Faculty of Science and Technology. "Towards an understanding of the physiological abnormality of tissue cultured plants known as vitrification." THESIS_FST_HPS_Gribble_K.xml, 1999. http://handle.uws.edu.au:8081/1959.7/417.

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For this research, the abnormality of tissue cultured plantlets,vitrification, was examined in Gypsophila paniculata.Measurement of the relative water content and water saturation deficit of plantlets in culture revealed that vitrified plantlets contain relatively more water and less air spaces than non-vitrified plantlets.The effect of relative humidity on vitrification and growth was investigated using a variety of methods.From the results found, it was determined the defining characteristic of vitrified plantlets is water filled intercellular spaces. It was also determined that the primary
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4

Robinson, David A. "Soil water content estimates based on the measurement of soil relative permittivity : use of capacitance, time domain reflectometry and impedance sensors." Thesis, University of Ulster, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267823.

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5

Coleman, David. "Applications of low-field Nuclear Magnetic Resonance technology to the ecophysiology of eucalypts." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/28052.

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The development of a precise, non-destructive method to measure leaf water status is an important step towards testing our theories and models of leaf hydraulic function. Many of the responses of stomata to rapid changes in leaf water content (minutes to hours) are difficult to measure, in part due to destructive sampling methodologies necessary for establishing leaf water content. In this thesis, I use the technology of nuclear magnetic resonance (NMR) relaxometry to measure dynamic in vivo leaf relative water content (RWC). I show how stomata respond to rapid water deficit with a high level
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6

Pandey, Lopa Mudra. "Electrical resistivity of sandy soil with water, leachates and seawater." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1724.

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Liners are used in the engineered containment systems such as landfills for controlling the migration of contaminants. Although there are several techniques for detecting the leakages through the liners, use of the electrical resistivity method can assist in timely detection of contaminant migration in cost-effective manner. This method is based on the well-established fact that the electrical resistivity of soils and other geomaterials is much higher than the electrical resistivity of water, leachates or any liquid effluents which may permeate the landfill foundation material. Additionally, t
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7

Alvarado, Barrera Nicole Andrea. "Respuestas morfo-fisiológicas de los vástagos y rebrotes en cepas de Peumus boldus Mol. según intensidad de corta, en la comuna de Olmué, Región de Valparaíso." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/151405.

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Memoria para optar al Título Profesional de Ingeniero Forestal<br>Peumus boldus Mol. (Boldo), es una especie endémica y característica del bosque esclerófilo. Su potencial económico está relacionado con la comercialización de sus hojas. El problema asociado a este mercado tiene relación con la sostenibilidad del recurso en el tiempo. Considerando su potencial económico, se evaluaron las respuestas morfo-fisiológicas en rebrotes nuevos y vástagos remanentes, según intensidad de corta, en la Comuna de Olmué, Región de Valparaíso. Se establecieron tres parcelas de 0,2 hectáreas cada una, donde s
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8

Moore, Zachary T. "ASSESSING THE RELATIVE MOBILITY OF SUBMARINE LANDSLIDES FROM DEPOSIT MORPHOLOGY AND PHYSICAL PROPERTIES: AN EXAMPLE FROM KUMANO BASIN, NANKAI TROUGH, OFFSHORE JAPAN." UKnowledge, 2015. http://uknowledge.uky.edu/ees_etds/27.

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A prominent landslide deposit in the Slope Basin seaward of the Megasplay Fault in the Nankai Trough was emplaced by a high-mobility landslide based on analysis of physical properties and seismic geomorphology. Slide acceleration is a critical variable that determines amplitude of slide-generated tsunami but is many times a variable with large uncertainty. In recent controlled laboratory experiments, the ratio of the shear stress to yield strength (defined as the Flow Factor) controls a wide spectrum of mass movement styles from slow, retrogressive failure to rapid, liquefied flows. Here, we a
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9

Graça, José Perez da. "Avaliação de parâmetros fisiológicos em cultivares de cana-de-açúcar submetidas ao déficit hídrico /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/92667.

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Resumo: A cana-de-açúcar (Saccharum spp.) é uma das principais culturas das regiões tropicais, cuja produtividade agrícola pode ser afetada pelo déficit hídrico. Para investigar o processo de tolerância e sensibilidade ao déficit hídrico, diferentes parâmetros fisiológicos foram avaliados em cultivares de cana-de-açúcar tolerantes (SP83-2847 e CTC15) e sensível (SP86-155) ao déficit hídrico. A deficiência hídrica afetou todo o aparato fotossintético das plantas de forma diferenciada dentro e entre as cultivares. A taxa fotossintética e condutância estomática diminuíram significativamente para
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10

Strabeli, Taila Fernanda. "Resposta hiperespectral na determinação do conteúdo de água na folha em diferentes espécies de Eucalyptus spp." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-29112016-145434/.

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Avaliar o estado hídrico das plantas é essencial para o monitoramento das culturas agrícolas e florestais. A interação da radiação eletromagnética com as plantas é um processo estudado por sensoriamento remoto (SR). Através da técnica de SR é possível interpretar os fatores que influenciam na quantidade de energia absorvida, transmitida e refletida pela planta. Neste estudo, buscou-se estabelecer as relações existentes entre variações nos parâmetros da água com o comportamento espectral e gerar modelos matemáticos que sejam capazes de predizer o conteúdo relativo da água (CRA) e espessura equi
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11

Geerdink, Gabriela Maria. "Efeito de tratamentos pré e pós-colheita na qualidade de rosas de corte." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-09082012-085941/.

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O objetivo do trabalho foi o desenvolvimento de tecnologias para melhoria da qualidade e vida de vaso em rosas (Rosa hybrida.) Vega. Os tratamentos précolheita foram realizados com aplicação de silício (0, 200, 400 e 800 mg L-1) por meio de fertirrigação via solo e via foliar. Foram realizadas seis aplicações semanais de silicato de potássio (12% Si) em rosas Vega, distribuídas em blocos casualisados com quatro repetições, e seis avaliações pós-colheita (dias 0, 2, 4, 6, 8 e 10). Após a colheita, foram avaliados: comprimento de haste, diâmetro de haste e de pedúnculo, comprimento de botão e a
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12

Graça, José Perez da [UNESP]. "Avaliação de parâmetros fisiológicos em cultivares de cana-de-açúcar submetidas ao déficit hídrico." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92667.

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Made available in DSpace on 2014-06-11T19:26:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-10Bitstream added on 2014-06-13T20:47:02Z : No. of bitstreams: 1 graca_jp_me_jabo.pdf: 256015 bytes, checksum: 389bd2988baccfc63d2527a482a1e26f (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A cana-de-açúcar (Saccharum spp.) é uma das principais culturas das regiões tropicais, cuja produtividade agrícola pode ser afetada pelo déficit hídrico. Para investigar o processo de tolerância e sensibilidade ao déficit hídrico, diferentes parâmetros fisiológicos fo
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13

Ayyaru, Thevar Prasanna. "Determining transpiration efficiency of eight grain sorghum lines [Sorghum bicolor (L.) Moench]." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1094.

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14

Felisberto, Guilherme. "Caracterização de respostas morfológicas e fisiológicas de plantas de soja submetidas a estresse hídrico." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-16032016-145836/.

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A cultura de soja (Glycine max (L.) Merrill) é muito importante mundialmente em função de seu uso na alimentação animal, como principal fonte de proteína e óleo, além de constituir a matéria prima básica para diversos setores da indústria. Sabe-se que a produtividade potencial de uma cultura é determinada por fatores genéticos e pelos seguintes atributos do ambiente de produção: temperatura, radiação solar, dióxido de carbono e fotoperíodo, sem restrição de água, nutrientes, plantas daninhas, pragas e doenças. A disponibilidade hídrica afeta o crescimento e desenvolvimento da cultura de soja,
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15

Butler, Tony. "Physiological effects of drought on perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinacea Schreb.)." Lincoln University, 2008. http://hdl.handle.net/10182/1098.

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The Canterbury plains are frequently exposed to summer drought and climate predictions forecast that the severity and frequency of summer drought will increase. The most commonly used pasture grass, perennial ryegrass (Lolium perenne L.), is drought sensitive. One possible method to maintain sward dry matter (DM) production under water stress is to use an alternative grass species such as tall fescue (Festuca arundinacea Schreb.). The objective of this research was to compare summer DM production of monoculture swards of perennial ryegrass and tall fescue under various seasonal drought regi
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16

Kallel, Hatem. "Influence de la température et de l'hygrométrie sur le comportement instantané du béton." Thesis, Pau, 2016. http://www.theses.fr/2016PAUU3013/document.

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Les enceintes de confinement sont sollicitées lors d'un accident grave par la modification thermodynamique du milieu interne qui génère une pression pouvant monter jusqu'à 5 bars, une température évaluée au maximum à 180 °C et une humidité relative pouvant aller jusqu'à la saturation. Au-delà de calculs réglementaires, la complexité de la sollicitation nécessite une bonne connaissance du comportement mécanique et thermique des matériaux et en particulier du béton dans la gamme de température et d'hygrométrie imposée afin d’être capable de mener les simulations numériques les plus réalistes pos
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17

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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"Enhanced Microbial Respiration of Photodegraded Leaf Litter at High Relative Humidity is Explained by Relative Water Content Rather Than Vapor Uptake Rate or Carbon Quality." Master's thesis, 2019. http://hdl.handle.net/2286/R.I.55522.

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abstract: There is a growing consensus that photodegradation accelerates litter decomposition in drylands, but the mechanisms are not well understood. In a previous field study examining how exposure to solar radiation affects decomposition of 12 leaf litter types over 34 months in the Sonoran Desert, litter exposed to UV/blue wavebands of solar radiation decayed faster. The concentration of water-soluble compounds was higher in decayed litter than in new (recently senesced) litter, and higher in decayed litter exposed to solar radiation than other decayed litter. Microbial respiration of litt
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19

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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20

Gribble, Karleen D. "Towards an understanding of the physiological abnormality of tissue cultured plants known as vitrification." Thesis, 1999. http://handle.uws.edu.au:8081/1959.7/417.

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For this research, the abnormality of tissue cultured plantlets,vitrification, was examined in Gypsophila paniculata.Measurement of the relative water content and water saturation deficit of plantlets in culture revealed that vitrified plantlets contain relatively more water and less air spaces than non-vitrified plantlets.The effect of relative humidity on vitrification and growth was investigated using a variety of methods.From the results found, it was determined the defining characteristic of vitrified plantlets is water filled intercellular spaces. It was also determined that the primary
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21

Eiasu, B. K. (Bahlebi Kibreab). "Influence of soil water management on plant growth, essential oil yield and oil composition of rose-scented geranium (Pelargonium spp.)." Thesis, 2009. http://hdl.handle.net/2263/28775.

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Introducing effective irrigation management in arid and semi-arid regions, like most areas of South Africa, is an indispensable way of maximising crop yield and enhancing productivity of scarce freshwater resources. Holistic improvements in agricultural water management could be realised through integrating the knowledge of crop-specific water requirements. In order to develop effective irrigation schedules for rose-scented geranium (Pelargonium capitatum x P. radens), greenhouse and field experiments were conducted at the Hatfield Experimental Farm of the University of Pretoria, Pretoria, Sou
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