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Dissertations / Theses on the topic 'Physical and chemical behavior'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 July 2024

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1

Singh, Jaspreet 1969. "Physical behavior of superabsorbent hydrogels in sand." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35618.

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Swelling equilibrium and kinetics of two commercial superabsorbent gel particles---sodium polyacrylate spheres and polyacrylamide-co-potassium acrylate grains---were studied in water and in sand at room temperature. Equilibrium experiments involved swelling gel particles at different depths in saturated sand columns packed with different sand sizes. Kinetic experiments were performed in a two-dimensional cell; both gel particle size and sand particle size were varied. Water flow in gel-conditioned sand was also investigated in columns and the two-dimensional cells for different gel dosages.<br

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2

Choo, Hyunwook. "Engineering behavior and characterization of physical-chemical particulate mixtures using geophysical measurement techniques." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52178.

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Natural geomaterials exhibit a wide range in size, physical properties, chemical properties, and mechanical behaviors. Soils that are composed of mixtures of particles with different physical and chemical properties pose a challenge to characterization and quantification of the engineering properties. This study examined the behavior of particulate mixtures composed of differently sized silica particles, mixtures composed of aluminosilicate and organic carbon particles, and mixtures composed of particles with approximately three orders of magnitude difference in particle size. This experimenta

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3

Woodson, Clifton Brock. "Thin Layers: Physical and Chemical Cues Contributing to Observed Copepod Aggergations." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7520.

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In the current study, behavioral responses of several species of calanoid copepods to mimics of oceanographic structure were observed and evaluated in the context of foraging and aggregation. Zooplankton distributions in oceanic habitats are often attributed to physical forcing; however, physical factors only act to drive ecological patterns at large scales (m to km). At fine to intermediate scales (cm to m) zooplankton behavior is believed to govern observed distributions, but the mechanisms and ecological significance of these behaviors are not well understood. In a water column, biologic

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4

Saleh, Abeer Mokeem. "Physical and chemical behavious of endodontic sealers and cements." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499923.

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5

Combs, Stephen H. "Physical and chemical effects of pelleting feed on broiler growth and behavioral parameters." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90926.

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Barred Rock chickens were offered diets that had been pelleted at 55° or 85°C. In an 8-week feeding trial, the subjects receiving pellets processed at the higher temperature experienced significant (P ≤ .05) weight gain over those receiving the diet processed at 55°C. Although feed consumption for this treatment increased as well, the difference was not significant (P ≤ .05). Chemical investigation revealed that metabolizable energy and bioavailability of lysine of both heat treatments were similar. Starch availability as measured by in vitro enzyme susceptibility, however, was lowered by incr

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6

Kamdem, Mbopda Alain. "COMPORTEMENT MÉCANIQUE ET PHYSICO-CHIMIQUE DES BÉTONS DE SOL SOUMIS A HAUTE TEMPÉRATURE." Electronic Thesis or Diss., CY Cergy Paris Université, 2023. http://www.theses.fr/2023CYUN1225.

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Le béton de sol est un matériau issu du mélange du sol avec un liant hydraulique. Il est une solution envisageable aujourd'hui dans le domaine de la construction pour les ouvrages de faibles résistances en compression comme le renforcement des sols de fondation pour chaussées, les écrans d'étanchéités, les aménagements extérieurs pour parking (dallage), les écrans de soutènements des terres. Ce matériau est réalisé in situ en utilisant le sol en place dans le cadre des projets de construction et contrairement au béton ordinaire, son utilisation permet de réduire l'empreinte carbone liée au tra

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7

Park, Geunhyung. "Characterization of actuator behaviors of ferrogels obtained from physical and chemical cross-linking methods." [Ames, Iowa : Iowa State University], 2008.

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8

Prakash, Vijay. "The influence of physico-chemical stresses on permeability and volume change behaviours of bentonite." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267114.

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9

Jeong, Sueng Won. "Influence of physico-chemical characteristics of fine-grained sediments on their rheological behavior." Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/24116/24116.pdf.

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10

Seclaman, Alexandra Catalina. "Chemical and physical behaviour of the trace elements in the silicate melts of the Earth's mantle." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEN004/document.

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Nous avons étudié des magmas ferrifères silicatés magnésiens à la pression du manteau terrestre en utilisant la dynamique moléculaire (First Principles Molecular Dynamics). Les résultats de l’équation d’état que nous avons obtenus à partir de nos simulations ont été utilisés pour créer un modèle chimique et minéralogique pour les zones de très basse vitesse sismique (ULVZ, anomalies régionales dans le manteau proche de la limite noyau-manteau). De plus, nous avons étudié le comportement du Ni, du Co et du Fe dans ces magmas et établi la dépendance du spin en fonction de la concentration, de la

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11

Haines, Philip Edward, and n/a. "Physical and Chemical Behaviour and Management of Intermittently Closed and Open Lakes and Lagoons (ICOLLs) in NSW." Griffith University. School of Environmental and Applied Science, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070221.132729.

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The term 'Intermittently Closed and Open Lake or Lagoon (ICOLL)' has been adopted in NSW to described wave dominated barrier estuaries with an intermittent connection to the ocean. ICOLLs can also be found in south east Queensland, south-west Western Australia, and some parts of Victoria and Tasmania, although they are not the dominant estuary type as in NSW. From an international perspective, ICOLLs are also found in South Africa, New Zealand, Mexico and the Atlantic coast of Brazil and Uruguay. Within NSW, ICOLLs are mostly located south of Sydney, due to the high wave activity and close p

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12

Haines, Philip Edward. "Physical and Chemical Behaviour and Management of Intermittently Closed and Open Lakes and Lagoons (ICOLLs) in NSW." Thesis, Griffith University, 2006. http://hdl.handle.net/10072/367425.

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The term 'Intermittently Closed and Open Lake or Lagoon (ICOLL)' has been adopted in NSW to described wave dominated barrier estuaries with an intermittent connection to the ocean. ICOLLs can also be found in south east Queensland, south-west Western Australia, and some parts of Victoria and Tasmania, although they are not the dominant estuary type as in NSW. From an international perspective, ICOLLs are also found in South Africa, New Zealand, Mexico and the Atlantic coast of Brazil and Uruguay. Within NSW, ICOLLs are mostly located south of Sydney, due to the high wave activity and close p

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13

Eze, Chuks Paul. "Chemical, physical and morphological changes in weathered coal fly ash : a case study of brine impacted wet ash dump." University of the Western Cape, 2011. http://hdl.handle.net/11394/5420.

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>Magister Scientiae - MSc<br>Fly ash is the major waste material produced by power plants in the combustion of coal to generate electricity. The main constituents of fly ash are Si, Al, Fe and Ca with smaller amount of S, Mn, Na, K, and traces of many other elements such as Co, Cd, As, Se, Zn, Mo, Pb, B, Cu and Ni. Fly ash is usually disposed either by dry or wet disposal methods. These disposal methods have raised major environmental concerns due to the potential leaching of chemical species from the ash heap by ingress of rainfall and brine used to transport the fly ash to the dam. This stu

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14

Dawes, Les A. "Role of soil physical and chemical characteristics and landscape factors in defining soil behaviour under long term wastewater dispersal." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16297/1/Les_Dawes_Thesis.pdf.

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The use of on-site wastewater treatment systems for the treatment and dispersal of domestic effluent is common in urban fringe areas which are not serviced by centralised wastewater collection systems. However, due to inappropriate siting and inadequate evaluation of soil characteristics, the failure of these systems has become a common scenario. The current standards and guidelines adopted by many local authorities for assessing suitable site and soil conditions for on-site dispersal areas are coming under increasing scrutiny due to the public health and environmental impacts caused by poorly

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15

Dawes, Les A. "Role of soil physical and chemical characteristics and landscape factors in defining soil behaviour under long term wastewater dispersal." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16297/.

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The use of on-site wastewater treatment systems for the treatment and dispersal of domestic effluent is common in urban fringe areas which are not serviced by centralised wastewater collection systems. However, due to inappropriate siting and inadequate evaluation of soil characteristics, the failure of these systems has become a common scenario. The current standards and guidelines adopted by many local authorities for assessing suitable site and soil conditions for on-site dispersal areas are coming under increasing scrutiny due to the public health and environmental impacts caused by poorly

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16

Carter, Kimberly Anne. "Impacts of Salt and pH on the Phase Behavior of Sea Spray Aerosol Proxy Films." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534468159117872.

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17

Zheng, Yexin. "MOLECULAR DYNAMICS SIMULATION STUDY OF NONLINEAR MECHANICAL BEHAVIOR FOR POLYMER GLASSES AND POLYMER RHEOLOGY." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1595776504507743.

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18

Rodgers, Christopher T. "Magnetic field effects in chemical systems." Thesis, University of Oxford, 2007. http://ora.ox.ac.uk/objects/uuid:f5878b88-c5ba-4cbd-83af-857431aef66e.

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Magnetic fields influence the rate and/or yield of chemical reactions that proceed via spin correlated radical pair intermediates. The field of spin chemistry centres around the study of such magnetic field effects (MFEs). This thesis is particularly concerned with the effects of the weak magnetic fields B₀ ~ 1mT relevant in the ongoing debates on the mechanism by which animals sense the geomagnetic field and on the putative health effects of environmental electromagnetic fields. Relatively few previous studies have dealt with such weak magnetic fields. This thesis presents several new theoret

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19

Watson, Rick Bruce. "The physical, chemical, and structural characteristics of MoOx catalysts supported over the binary oxide of Silica/Titania and relationships to their behavior in the oxidative dehydrogenation of Propane and Ethane /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu14864018952095.

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20

LIU, JIAWEI. "Photo-generated Electrons in TiO2: Properties, Behaviors, Reactions, and Applications." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1527611572080323.

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21

Tezcan, Okan. "Metastatic Behaviour Of Doxorubicin Resistant Mcf-7 Breast Cancer Cells After Vimentin Silencing." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615553/index.pdf.

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Chemotherapy is one of the common treatments in cancer therapy. The effectiveness of chemotherapy is limited by several factors one of which is the emergence of multidrug resistance (MDR). MDR is caused by the activity of diverse ATP binding cassette (ABC) transporters that pump drugs out of the cells. There are several drugs which have been used in treatment of cancer. One of them is doxorubicin that intercalates and inhibits DNA replication. However, doxorubicin has been found to cause development of MDR in tumors. It has been reported that there is a correlation between multidrug resistance

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22

Bit, Goutam. "Studies on physico-chemical behaviour of water soluble synthetic polymers." Thesis, University of North Bengal, 2006. http://hdl.handle.net/123456789/858.

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23

Jiménez, Rojas José Waldomiro. "Estudo da resistência, condutividade hidráulica e lixiviação de um solo argiloso cimentado e contaminado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/70901.

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Cada vez mais freqüente, a utilização de técnicas tradicionais da engenharia geotécnica depara-se com obstáculos de caráter econômico e ambiental. A técnica do solo-cimento tornase atrativa quando o melhoramento das propriedades do solo do local constitui-se em uma alternativa de projeto. A técnica de tratamento de solos com cimento encontra aplicação, por exemplo, na construção de bases para pavimentos, na proteção de taludes em barragens de terra, como camada de suporte para fundações superficiais, como remediação de solos contaminados e como barreiras de contenção de contaminantes. Desta fo

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24

Nilsson, Frederik. "Alkylglucosides physical-chemical properties /." Lund : Physical Chemistry 1, Center for Chemistry and Chemical Engineering, Lund University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/39761789.html.

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25

Ali, Moazzam. "Physico-chemical studies on selected amphiphiles and their aggregation behaviour in different media." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1427.

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26

Steele, Aaron J. "Collective behavior in chemical systems." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5386.

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Thesis (Ph. D.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains vii, 126 p. : ill. (some col.) + video files. Includes supplementary video files in a zip file. Includes abstract. Includes bibliographical references.

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27

Weikel, Ross R. "Physical Transformations for Greener Chemical Processes." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11654.

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Homogenous acid catalysts are prevalent throughout the chemical industry but all have the drawback of requiring post reaction neutralization and subsequent downstream removal of the product salt. The use of a base to neutralize the acid and the processing of the salt are ancillary to the process and the disposal of the salt is an environmental concern. The work presented here shows the use of alkylcarbonic acids, which form in situ with CO₂ pressure and neutralize on loss of CO₂ pressure rather than requiring a base. Thus CO₂ can be used to "switch" the acid on and off. The properties of alky

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28

Perrman, Delmar. "Nonlinear effects in chemical dynamics and chemical kinetics: Chaos in physical chemistry." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/9500.

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This work shows that nonlinear dynamic systems are quite different from linear dynamic systems. The usual phase plots of linear and nonlinear dynamical systems are also distinctly different, even before damping or forcing terms are added. It is also shown that the usual phase plot allows for the visualization of unobservable information that is present in the times series. The higher-order phase plots give yet additional information that is not present in the existing methods of plotting the data. Higher-order phase plots were originated and applied for the first time to a dynamical system (Mo

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29

Wickham, Andrew. "Fast chemical reactions." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309276.

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30

Sultana, Sakina. "Comparison between polyvinylpyrrolidone-based and polyoxazoline nonionic surfactants : their physico-chemical and solubilisation behaviour." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367734.

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31

Mrinmay, Jha. "Physico-chemical studies on soft matter: behaviour of surfactant aggregate and biodegradable polymer systems." Thesis, University of North Bengal, 2015. http://ir.nbu.ac.in/handle/123456789/1526.

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32

Churakov, Sergey. "Physical-chemical properties of complex natural fluids." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962849723.

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33

Zysman-Colman, Eli. "The chemical and physical properties of polychalcogens." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84864.

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The optimized synthesis of acyclic dialkoxy disulfides and aromatic polysulfides is described and their physical properties probed. A theoretical survey of dialkoxy disulfides and thionosulfites was undertaken in order to determine the most efficacious method for accurately modeling these compounds. In particular, the origin of the high barrier to rotation in the dialkoxy disulfides was determined to be due to a generalized anomeric effect resulting from two lone pair donations of each sulfur atom into each of their respective sulfur-oxygen antibonding orbitals. The origin of the high r

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34

Alves, Luis. "Physical and chemical properties of gold nitride." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512027.

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35

Prentice, Mott Harrison Valentine. "Chemical and Physical Determinants of Cell Migration." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11494.

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The phenomenon of directed cell motion in response to external directional cues has drawn significant interest for more than a century, with the first recorded observations of bacterial chemotaxis at the end of the 19th century. Furthermore, movies generated by David Rogers while at Vanderbilt University of a peripheral blood neutrophil tracking a bacterium are a staple of any college biology class to demonstrate the phenomenon of eukaryotic chemotaxis. In just the last decade, our understanding of the biochemical mechanisms underlying the process of directed eukaryotic cell migration. As a re

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36

Kealey, Christopher P. "Chemical and physical modification of diamond surfaces." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252466.

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37

Chan, Kwong. "Physical and chemical etching of textile materials." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305646.

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38

Katsiadaki, Ioanna. "Physical and chemical attributes of cod roe." Thesis, University of Lincoln, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387667.

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39

McKinnon, Julian Thomas. "Chemical and physical mechanisms of soot formation." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14334.

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40

Irsfeld, Meredith Lynn. "Physical and Chemical Treatments for Bacterial Biofilms." Thesis, North Dakota State University, 2014. https://hdl.handle.net/10365/27595.

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Physical and chemical treatments have been investigated for the treatment to remove biofilms. This thesis examines the problem of the removal and prevention of biofilms by: (i) using a water jet to determine biofilm stability and (ii) testing the effect of ?-phenylethylamine (PEA) on growth and biofilm amounts. Three dimensional structures of biofilms vary in different genetic backgrounds of E. coli, we wanted to see whether changes in structures were paralleled by differences in stability of the biofilm. The water jet apparatus was used to test biofilm stability of E. coli mutants. Alteration

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41

Kavanagh, Debbie M. "Chemical and physical characterization of clay bodies." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9643/.

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Suitable methods for the assessment of the effect of freeze-thaw action upon ceramic tiles have been determined. The results obtained have been shown to be reproducible with some work in this area still warranted. The analysis of Whichford Potteries clays via a variety of analytical techniques has shown them to be a complex mix of both clay and non-clay minerals. 57Fe Mössbauer spectroscopy has highlighted the presence of both small and large particleα-Fe203, removable via acid washing. 19F MAS NMR has demonstrated that the raw Whichford Pottery clays examined have negligible fluorine content.

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42

Larson, Nicholas R. "Chemical Manipulation of Honey Bee Behavior." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78008.

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The loss of managed honey bee colonies, resulting from their unintentional exposure to pesticides, is a topic of concern for the agricultural and apicultural industry. Current methods for reducing pesticide exposure to bees involve the application of pesticides before crop bloom or in the evening when foraging bees are less likely to be exposed to these applications. There is an urgent need for additional protection procedures to reduce the annual losses of managed bee colonies. Another method for protecting these pollinators is the use of chemical deterrents to reduce the interaction times

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43

VILLARROEL, FLAVIA MARA GUZMAN. "PHYSICAL SIMULATION OF WELLBORE MECHANICAL BEHAVIOR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15178@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>Um dos maiores desafios para a produção de hidrocarbonetos em reservatórios de arenitos pouco consolidados é o controle da produção de areia. Os mecanismos envolvidos nesse fenômeno são complexos e isto é resultado de uma grande variedade de fatores, como por exemplo, a magnitude das tensões in situ, a resistência mecânica da formação e as operações de desenvolvimento do poço. Este problema pode ser resolvido ou amenizado até níveis aceitáveis através de estratégias de completação

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44

GURDERE, CEREN. "SELF-REGULATION OF PHYSICAL ACTIVITY BEHAVIOR." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3444254.

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In the present thesis, it was aimed to investigate self-regulation of physical activity (PA) behavior with regard to reflective and automatic processes involved. The roles of trait self-control, PA intention, PA behavior automaticity, affective reactions during PA, and executive functions were investigated. In order to assess trait self-control in the subsequent study, in the first study, it was aimed to validate Italian version of the Brief Self-Control Scale (BSCS; Tangney, Baumeister, & Boone, 2004) which is a widely used measure of trait self-control. Two hundred and sixty-two Ital

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45

Pearce, Caroline Louise. "The influence of physico-chemical stresses on sorption and volume change behaviours of bentonite." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340138.

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46

Bhattacharyya, K. G. "Chemical reactivity of mica surfaces." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37638.

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47

Dobbyn, Abigail J. "Chemical dynamics using wavepacket methods." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5678/.

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This thesis is concerned with studying chemical dynamics using time-dependent quantum mechanics and in particular using the Fourier method. Various ways of implementing the Fourier method are described, both for calculations in one dimension and for those in many dimensions. The Fourier method is then used to simulate time-resolved femtosecond and picosecond pump-probe experiments, which investigate the B state of the sodium trimer. The simulation is divided into three stages: the initial wavefunction is generated by modelling the effect of the pump laser pulse on the ground state wavefunction

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48

Denuault, Guy. "Microelectrode studies of chemical reactions." Thesis, University of Southampton, 1989. https://eprints.soton.ac.uk/179323/.

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Neumann's integral theorem has been used to establish exact analytical solutions for chronoamperometric experiments and for the steady state limiting current for CE and catalytic EC mechanisms. To convert these solutions into a useful form, FORTRAN programs have been written for the necessary numerical calculations. The analytical response of microdiscs, for chronoamperometry as well as the steady state for CE and EC' reactions is presented. A different theoretical approach, as well as digital simulations, are used for the interpretation of steady state limiting currents for EC' reactions, in

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49

Bouhroum, Abdennour. "Characterisation of the physico-chemical and solid-state behaviour of drugs in HFA-134 and 227." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12004/.

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Most drugs have a considerably low solubility in the environmentally friendly hydrofluoroalkane propellants (HFAs) currently used in pressurized metered dose inhalers (pMDIs). As a consequence, instability can occur from crystal growth and Ostwald ripening of the system altering the therapeutic performance of the pMDI. Understanding and being able to predict the behaviour of such drugs in the propellant will help in selecting the correct co-solvents and/or surfactants to increase the stability of such formulations. When anhydrous beclomethasone dipropionate (BDP) is suspended in tricholoromono

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50

Sarkar, Abhijit. "Solution behaviour of some food additions and drugs in different aqueous media : a physico-chemical study." Thesis, University of North Bengal, 2016. http://ir.nbu.ac.in/handle/123456789/2597.

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