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Dissertations / Theses on the topic 'Alkalis'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Halaweh, Mahmoud. "Effect of alkalis and sulfates on Portland cement systems." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0002120.

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2

Kowalski, Torsten. "Evaluating a surface ionisation detector for measuring alkalis in biomass gasification /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17067.

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3

Sanguinetti, Stefano. "ATOMIC PARITY VIOLATION IN HEAVY ALKALIS: Detection by Stimulated Emission for Cesium and Traps for Cold Francium." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2004. http://tel.archives-ouvertes.fr/tel-00006785.

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Le travail présenté porte sur les progrès récents d'expériences de spectroscopie atomique sur césium et francium, visant à des mesures précises de violation de parité (PV) dans ces atomes. Dans le cadre d'une “thèse en cotutelle”, le candidat s'est consacré d'une part aux mesures PV préliminaires (8% de précision) de l'actuelle expérience Cs au LKB à Paris, et d'autre part à la préparation d'un échantillon d'atomes radioactifs de Fr (production et piégeage) aux LNL (INFN) en Italie. Ces deux expériences sont à des stades très différents. Les mesures présentées pour le Cs s'inscrivent en fait d

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4

Soares, Dora Cristina Marques. "Estudo e caracterização de agregados para betão. Avaliação da sua contribuição para o aumento da alcalinidade e no desenvolvimento da reação álcalis-sílica no betão." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/12981.

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A degradação de infraestruturas de betão por reações álcalis-sílica, tem motivado a preocupação dos donos de obras e comunidade científica. Em Portugal, existem algumas dezenas de estruturas danificadas. Uma forma de prevenir a RAS é o conhecimento da reatividade dos agregados aos álcalis, o que exige métodos que permitam um correto diagnóstico. Também o seu desempenho, em interação com os constituintes do betão e ambiente exterior é importante, pois estes influenciam o seu comportamento na estrutura. A prevenção tem sido efetuada utilizando materiais pozolânicos, que controlam a alcalinidade,

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5

Ferreira, Cícero. "A natureza da potassa e os métodos de preparação em finais do século XVIII numa publicação do Frei Veloso: Alographia dos Alkalis Fixos." Pontifícia Universidade Católica de São Paulo, 2010. https://tede2.pucsp.br/handle/handle/13455.

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Made available in DSpace on 2016-04-28T14:16:46Z (GMT). No. of bitstreams: 1 Cicero Ferreira.pdf: 687006 bytes, checksum: 7cd66ef011c8f123a2a139f85912f86b (MD5) Previous issue date: 2010-05-12<br>Secretaria da Educação do Estado de São Paulo<br>By the end of the eighteenth century many were the studies on how one could identify and produce different kinds of alkali. In this dissertation we shall try to establish a relation between the practices and theories applied to obtain different salts which were used in a number of products like soaps, glasses, medication, as well as in gunpowder indus

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6

Idir, Rachida. "Mécanismes d'action des fines et des granulats de verre sur la réaction alcali-silice et la réaction pouzzolanique." Thèse, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/1934.

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Recycling composite glass with different colours in order to be manufactured into new glass products is at present not economically viable. Therefore, the search for new issues other than stockpile areas or dumping sites could be a serious opportunity. To a certain extent, one of the possible solutions is to use the recycled glass in manufacturing cements and in the preparation of concrete mixtures. However, it is essential to manage the two main behaviours that the glass can have when used in cement-based materials: (1) the use of glass as coarse aggregates reveals harmful behaviour related t

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7

Grasso, Giuseppe. "Solid-state NMR studies of alkali fullerides and long-chain alkanes." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/10051/.

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The main focus of this thesis is the investigation of structure and motion of different materials by applying different solid-state NMR techniques. In the first section (1) some of the bases of NMR are described both in a Classical (1.1) and Quantum Mechanical (1.2) approach, while the next two sections deal with the experimental part of the work. In section 2 solid-state NMR studies of CsC60 are described and an unambiguous assignment of the 13C NMR spectrum of the polymer phase of CsC60, which is based solely on our experimental data, is presented. In contrast to previous work, the assignmen

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8

Jones, Sally Anne. "Alkali and alkaline earth metal fluoride mediated aromoatic halogen exchange reactions." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367085.

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9

Robinson, Alex Lockwood. "Sonoluminescence for the quantitative analysis of alkali and alkaline earth chlorides /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8687.

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10

Hara, Hideaki. "Production of Quantum Degenerate Mixtures of Alkali and Alkaline-Earth-Like Atoms." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/185217.

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11

St-Amour, J. C. "The structural role of titanium in alkali and alkaline-earth bearing glasses." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29254.pdf.

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12

Witherow, Rebecca A. "Minor Alkaline Earth Element and Alkali Metal Behavior in Closed-Basin Lakes." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250628213.

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13

Wood, C. R. "Theoretical study of hydrogen storage in alkali- and alkaline-earth graphite intercalate compounds." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1399843/.

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The research project described in the thesis uses atomic-scale computational modelling to investigate the storage of hydrogen in graphite intercalate compounds (GICs). The work is relevant to the energy economy, as hydrogen is a source of clean energy, and can be used efficiently in fuel cells to generate electricity. Storing hydrogen safely has long been a challenge in materials science and, since the proposal of a hydrogen-based transport economy, has attracted great attention. Graphite intercalate compounds offer the possibility of dense storage, because they contain large absorption pores

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14

Davidson, Matthew Gwilym. "Alkali and alkaline earth metal complexes of multifunctional amines : syntheses, structures and uses." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272659.

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15

Callaghan, Owen. "Synthetic and mechanistic studies in free radical." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366957.

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16

Chen, Chun-che. "Correlation between electrical and magnetic properties in alkali and alkaline earth metal doped lanthanum manganites /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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17

Wilt, Jan Carol. "Geochemical patterns of hydrothermal mineral deposits associated with calc-alkalic and alkali-calcic igneous rocks as evaluated with neural networks." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186500.

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Six alkalinity and oxidation classes of fresh igneous rocks were correlated with trace elements in rock chip samples from temporally and spatially associated ore deposits. Learning vector quantization and back-propagation artificial neural networks correctly classified 100 percent of whole rock oxides and 99 percent of mineralized samples; discriminant analysis correctly classified 96 and 83 percent, respectively. The high degree of correlation between chemistries of igneous rocks and related mineralization implies genetic links between magmatic processes or sources and the ore deposits studie

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18

Fukasawa, Kazuhito. "Systematic Study on the Thermodynamic Stability of Lanthanides and Actinides in Molten Alkali and Alkaline Earth Chlorides." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157576.

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19

Coufal-Majewski, Stephanie. "Characterising the impact of ergot alkaloids on digestibility and growth performance of lambs." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/17226.

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The negative impacts of ergot contamination of grain on the health of humans and animals were first documented during the fifth century AD. Although ergotism is now rare in humans, cleaning contaminated grain concentrates ergot bodies in screenings which are used as livestock feed. Ergot is found worldwide, with even low concentrations of alkaloids in the diet (<100 ppb total), reducing the growth efficiency of livestock. Extended periods of increased moisture and cold during flowering promote the development of ergot in cereal crops. Furthermore, the unpredictability of climate change may hav

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20

Antropow, Alyssa Hope. "Synthesis and anticancer evaluation of agelastatin alkaloid derivatives and enantioselective total synthesis of aspidosperma alkaloids." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118214.

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Thesis: Ph. D. in Organic Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2018.<br>Cataloged from PDF version of thesis. Vita.<br>Includes bibliographical references.<br>I. Synthesis and Evaluation of Agelastatin Derivatives as Potent Modulators for Cancer Invasion and Metastasis The synthesis of new agelastatin alkaloid derivatives and their anticancer evaluation in the context of the breast cancer microenvironment is described. A variety of Ni -alkyl and C5-ether agelastatin derivatives were accessed via application of our strategy for convergent imidazolone synthe

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21

Sedlock, Andrea B. "Ergot alkaloids and herbivory in model animals and variation in an ergot alkaloid biosynthesis gene." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3190.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains viii, 62 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical reference.

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22

Potratz, Christopher M. "The Synthesis, Structure and Characterization of Extended Cobalt Ruthenium Carbonyl Compounds." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275413923.

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23

Romeril, Stuart P. "Synthesis and structural elucidation of the Bis-3-alkylpyridine alkaloid pyrinodemin A and other monomeric alkaloids." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288526.

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24

Ávila, Tainara Cristina. "Estudo da utilização da mistura de cinza da casca de arroz com hidróxido de sódio na produção de argamassas ativadas alcalinamente /." Ilha Solteira, 2018. http://hdl.handle.net/11449/180872.

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Orientador: José Luiz Pinheiro Melges<br>Resumo: Atualmente, é vasta a quantidade de materiais estudados com potencial de substituir o cimento Portland em matrizes cimentícias, uma vez que a produção do mesmo é responsável pela emissão de grande quantidade de CO2, o que contribui drasticamente para o efeito estufa. Nesse contexto, os aglomerantes ativados alcalinamente são materiais que prometem qualidades similares ou superiores àqueles à base de cimento, porém produzidos com elementos menos agressivos ao meio ambiente. Neste trabalho, é realizado o estudo da aplicação de Cinza da Casca de Ar

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25

Svingala, Forrest R. "Alkali activated aerogels /." Online version of thesis, 2009. http://hdl.handle.net/1850/10097.

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26

Teng, Weijie Ruhlandt-Senge Karin. "From polymerization initiators to precursors for solid-state materials syntheses and structures of a series of molecular alkali and alkaline earth metal derivatives /." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.

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27

Santoru, Antonio [Verfasser]. "Insights into the structure and reaction mechanism of alkali and alkaline-earth metal amide-metal hydride composite systems for hydrogen storage / Antonio Santoru." Hamburg : Helmut-Schmidt-Universität, Bibliothek, 2018. http://d-nb.info/1162510706/34.

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28

Pagot, G. "Electrode and electrolyte materials for the development of high voltage lithium-ion batteries and secondary batteries based on alkali and alkaline-earth ions." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426843.

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The research activity described in this thesis has been focused on the development and study of novel electrolyte and electrode materials for application in Lithium and Magnesium secondary batteries. The proposed materials belong to the “beyond Li-ion” class of compounds, where systems exceeding the energy density values of classic Li-ion batteries or completely innovative chemistries are presented. Three different classes of electrolytes have been prepared and studied. A solid polymer electrolyte has been obtained by a lithium functionalization of a poly(vinyl alcohol-co-vinyl acetate), form

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29

Brown, Ammon W. "Relative Toxicity of Select Dehydropyrrolizidine Alkaloids and Evaluation of a Heterozygous P53 Knockout Mouse Model for Dehydropyrrolizidine Alkaloid Induced Carcinogenesis." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4519.

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Dehydropyrrolizidine alkaloids (DHPAs) are a large group of globally important plant-derived pro-toxins that can contaminate or are naturally present in animal feed and the human food supply as well as herbal supplements. Their bioactive metabolites are potentially hepatotoxic, pneumotoxic, genotoxic and carcinogenic. Due to the difficulty in obtaining sufficient quantities of purified DHPAs, toxicity studies have largely relied on single intraperitoneal injections in rodent models, and carcinogenicity studies have been limited to a small handful of the hundreds of isolated DHPAs. To assess th

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30

Chen, Jian. "Alkali metal cluster theory." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305984.

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31

Walker, Frank David Lathangie. "Micropores in alkali feldspars." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/13174.

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When observed optically, alkali feldspars often appear dusty or turbid. The cause of this turbidity is at or beyond the limits of optical resoltuion but by using electron microscopy it has been shown to be intimately related to the presence of micropores. Micropores are found in all pink or white alkali feldspars and are absent only from fresh black feldspars from rocks (such as fayalite or pyroxene bearing rapakivi granites, granulites and a lunar breccia) which petrographically show evidence of a very dry history. In general, micropores, averaging 0.5μm in length, make up around 1.5% of the

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32

Mwatile, Martha Ndinelao. "Assessment of alkali aggregate reaction avoidance measures and alkali aggregate reaction tests worldwide." Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/33881.

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Alkali Aggregate Reaction (AAR) is a deterioration mechanism which affects concrete structures all over the world. Different parts of the world employ various mitigation and control measures for AAR damage. Different tests are also performed worldwide to assess AAR. With the variety of AAR avoidance measures and AAR tests performed worldwide, it is necessary to have a thorough compilation and critical assessment of these AAR avoidance measures and AAR tests, which may be of assistance to engineers and other professionals who are involved in structural and material design of concrete structures

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33

Arumugam, Nachiappan. "New ternary alkali oxides and quaternary alkali oxy-nitrides of molybdenum and tungsten." [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB12103661.

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34

Guhl, Stefan. "Thermodynamische Modellierung des Mineralstoffverhaltens im BGL-Vergasungsprozess." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-81607.

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Die Arbeit befasst sich mit der thermodynamischen Modellierung des British Gas-Lurgi-Vergasungsprozesses (BGL). Es werden auftretende Schwachstellen des Prozesses analysiert und auf das Verhalten der Mineralstoffkomponenten zurückgeführt. Auf Grundlage einer Stoffbilanz sowie zahlreicher Prozessdaten (BGL-Vergaser der SVZ Schwarze Pumpe GmbH) wurde das in SimuSage erstellte Stufenmodell an Nichtgleichgewichtszustände und Transportvorgänge angepasst. Das Modell erlaubt die qualitative und quantitative Beschreibung eines Alkalikreislaufes, welcher durch KCl geprägt ist. Mit dem Modell werden wir

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35

Tänzer, Ricarda [Verfasser], Dietmar [Akademischer Betreuer] Stephan, Dietmar [Gutachter] Stephan, Frank [Gutachter] Dehn, and Frank [Gutachter] Winnefeld. "Alkalisch aktivierte Systeme auf Basis von Hüttensandmehlen : Untersuchung des Einflusses der Hüttensandzusammensetzung auf die Bindemitteleigenschaften und Verhalten alkalisch aktivierter Mörtel hinsichtlich einer Alkali-Kieselsäure-Reaktion / Ricarda Tänzer ; Gutachter: Dietmar Stephan, Frank Dehn, Frank Winnefeld ; Betreuer: Dietmar Stephan." Berlin : Technische Universität Berlin, 2018. http://d-nb.info/1156331382/34.

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36

Bystrianska, Emília. "Vliv alkalického aktivátoru na imobilizaci kovů v alkalicky aktivované strusce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401854.

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In this work the influence of alkaline activator on immobilization of lead and copper in alkali-activated blast furnace slag was investigated. A total of five activators were used; sodium water glass, potassium water glass, sodium hydroxide, potassium hydroxide and sodium carbonate. The leaching test according to ČSN EN 12457-4 was used to evaluate the level of immobilization of heavy metals, the leached solutions were analyzed by ICP-OES. For a better understanding of immobilization, the selected samples were characterized by analytical methods (FTIR, XRD, SEM, XPS). It was found that the deg

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37

Jawad, Khalil Ibrahim. "Electrolytic coloration of the alkali halides with a special reference to the alkali fluorides." Thesis, City University London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333466.

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38

Li, Zihui. "Acid Leaching Resistance and Alkali Silica Reaction (ASR) of Alkali-Activated Cement Free Binders." Thesis, Clarkson University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10640300.

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<p> Recently, increased awareness of the significance of developing sustainable materials for construction has renewed the interest in exploring Alkali activated concrete (AAC), a concrete that contains no cement, but only industrial by-products such as fly ash and slag, as a low energy alternative to the conventional concrete. Although the feasibility of making alkali–activated concrete with acceptable strength and mechanical properties is well documented, the information regarding the long-term durability, including resistance to acid attack and alkali silica reaction (ASR), is far fro

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39

Rogers, Daniel Eamonn. "Investigating ultracold alkali halide molecules." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602945.

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The thesis explores small triatomic and diatomic alkali halide molecules at state specific resolution at ultracold regime. Ab initio calculations are carried out to further publishable data to attempt a global potential energy surface for both LiF and LiCl, reacting with an approaching Li atom. Potential curve dynamics for both reactions, including well depths, avoided crossings and barrier heights are calculated to SA CASSCF and CCSD(T) level using an A VTZ basis set on all four states. This methodology is repeated as a function of the diatomic bond length. Both reactions are then compared to

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40

Gant, Dean Alan. "Comparison of alkali ion emitters." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28043.

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41

Meredith, Andrew William. "Physisorption at alkali-halide surfaces." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362807.

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42

Adediran, A. (Adeolu). "Alkali activation of fayalite slag." Master's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201709062801.

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In this thesis, alkali activation of fayalite slag was investigated. The slag utilized is a waste by product from nickel production, the activation of which resulted in the formation of a geopolymer binder of acceptable properties. The need for a reduction in overall waste output as well as the cementitious properties exhibited by this slag motivated this study. The literature section of this research provides an insight on the previous work in the area of geopolymerization, the source materials used, the activators employed as well as the properties exhibited by various geopolymer products.

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43

Vass, Raymond J. "Alkali attack on ceramic filters." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42062.

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Experiments were performed to determine a suitable binder material for silicon carbide-based ceramic filter. These experiments included exposure of 42% and 60% alumina, aluminosilicates to potassium and sodium containing environments for the purpose of determining the phases that would form and to determine concentration profiles. In addition, thermodynamic calculations were performed to predict the phases that would form when the alkali reacted with the aluminosilicate. The results of the thermodynamic calculations indicated that the alkali compounds will react at temperatures as low as 800

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44

Vermillion, Karl E. "Investigation of the structure of alkaki- and alkaline-earth disilicates by oxygen-17 nuclear magnetic resonance and by ab initio calculations /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487951214937661.

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45

Zhang, Lei. "Transformation of char structure and alkali and alkali earth metallic species during pyrolysis and gasification." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/722.

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This study focused on the formation and transformation of nascent char structure during the pyrolysis in He and the gasification in CO2/O2 of biomass and low-rank coal. The effects of nascent char structure and the concentration of AAEM species on nascent char reactivity were investigated. The results will be useful for the development of low-emission gasification-based technologies for the utilisation of biomass and low-rank coal.

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46

Mathews, C. J. "Alkaloid synthesis." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238202.

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47

Atkinson, Jonathan D. M. "Alkaloid synthesis." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302885.

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48

Krug, Andreas. "Alkali Rydberg States in Electromagnetic Fields." Diss., lmu, 2001. http://nbn-resolving.de/urn:nbn:de:bvb:19-3362.

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49

Allen, Katharine M. "Intercalation chemistry of alkali metal fullerides." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390457.

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50

Al-Otaibi, Saud. "Performance of alkali-activated slag concrete." Thesis, University of Sheffield, 2003. http://etheses.whiterose.ac.uk/3453/.

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The environmental concerns related to the production of cement in terms of the energy consumption and the emission of CO2 lead to the search for more environmentally viable alternatives to cement. One of those alternative materials is alkali-activated slag (AAS) where ground granulated blast furnace slag is used not as a partial replacement to cement but as the sole binder in the production of concrete. The performance of alkali-activated slag concrete with sodium silicate (water glass) as an activator was studied. The scope of the work covered seven mixes: a normal strength OPC control mix, a

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