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Dissertations / Theses on the topic 'Alkali elements'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

McBride, Emma Elizabeth. "On structural studies of high-density potassium and sodium." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/8928.

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The alkali elements at ambient conditions are well described by the nearly-free electron (NFE) model, yet show a remarkable departure from this “simple” behaviour with increasing pressure. Low-symmetry complex structures are observed in all, and anomalous melting has been observed in lithium (Li), sodium (Na), rubidium (Rb), and caesium (Cs). In this Thesis, static and dynamic compression techniques have been used to investigate the high-pressure high-temperature behaviour of the alkali elements potassium (K) and Na. Utilising diamond anvil pressure cells and external resistive heating, both i

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2

Majlesi, Yasin. "A laboratory investigation into the structural performance and mechanical properties of plain and reinforced concrete elements affected by alkali silica reaction." Thesis, Queen Mary, University of London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313114.

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The object of this study was to help clarify some of the fundamental problems occurring in plain and reinforced concrete structural elements suffering from the degradation phenomenon of alkali silica reaction. A laboratory based testing programme was used, so that extreme conditions for generating alkali silica reaction could be used which are not readily achieved in actual structures. Special concrete mixes were also used in which the alkali silica reaction occurs within a period of months rather than years so that observation of the properties of the reacted concrete could be taken throughou

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3

CRAVEN, KERI. "THE ORIGIN OF ALKALIC BASALTS FROM HALEAKALA VOLCANO, EAST MAUI, HAWAII." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060891813.

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4

Balabuch, Tito José Rodrigues. "Análise numérica das deformações do concreto sujeito à reação álcali-agregado considerando os efeitos de retração e fluência." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-27082018-125220/.

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As deformações derivadas da retração e da fluência estão entre os principais fatores que afetam a integridade e facilidade de manutenção das estruturas de concreto a longo prazo. Outro fator que corrobora para a deterioração do concreto é a Reação Álcali-Agregado (RAA), que devido à sua característica expansiva é considerada uma manifestação patológica de difícil tratamento, sendo necessário medidas mitigadoras para evitar sua ocorrência. A retração, a fluência e a RAA são deformações expressivas em estruturas com grandes volumes de concreto, em que as deformações devido à retração e à fluênci

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5

Stegmaier, Saskia [Verfasser], Thomas F. [Akademischer Betreuer] Fässler, Hubert [Akademischer Betreuer] Schmidbaur, and Karsten [Akademischer Betreuer] Reuter. "Clusters and Networks of Tetrel Elements and Late d Block Metals in Ternary Intermetallic Phases with Alkali and Alkaline Earth Metals / Saskia Stegmaier. Gutachter: Thomas F. Fässler ; Hubert Schmidbaur ; Karsten Reuter. Betreuer: Thomas F. Fässler." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1051935032/34.

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6

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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7

Faure, Pierre. "Comportement des éléments lithophiles lors de la formation du noyau terrestre." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC076.

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La formation du noyau est un événement central de l'histoire de l'accrétion terrestre, responsable d'une ségrégation majeure des éléments chimiques selon leurs affinités pour le métal (sidérophile) ou le silicate (lithophile). La Terre silicatée montre en effet un appauvrissement en éléments sidérophiles cohérent avec la formation d'un noyau au sein d'un océan magmatique plus ou moins profond. Cette affinité d'un élément chimique est fonction des conditions physico-chimiques (P, T, fo2, composition chimique) dans lesquelles se déroule la différenciation métal-silicate. Le comportement d'un élé

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8

Smith, R. G. "Neutral homoleptic alkyls of yttrium and the 4f elements." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384737.

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9

Vilela, Gorga Rodrigo. "Engineering-Based FE Approach to Appraise Slender Structures Affected by Alkali-Aggregate Reaction (AAR)." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38179.

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Alkali-aggregate reaction (AAR) is one of the most harmful distress mechanisms affecting the performance of aging reinforced concrete structures worldwide. Although several prediction models have been developed to assess the chemical reaction, a thorough and comprehensive approach with the capabilities to correlate important parameters that affect AAR and the mechanical properties of deteriorated materials, as well as the abilities to describe the current damaged state of AAR-affected structures (diagnosis) and predict the potential of further damage (prognosis) is still lacking. Such informat

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10

Miller, Sarah Ann Rossman George Robert Rossman George Robert. "Alkaline earth element partitioning in simplified magmatic systems /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-05132007-103357.

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11

Salomão, Rafael Corrêa. "Análise da influência do campo higrométrico sobre a reação álcali-agregado." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-27042017-091229/.

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A reação álcali-sílica é uma patologia de origem química que ocorre em estruturas de concreto. A partir desta reação há a formação de um gel de álcali-sílica que em contato com a água provoca expansão e deformação da estrutura. Esta patologia traz muitos transtornos e prejuízos, principalmente em obras que estão em contato direto com a água (barragens, pontes, piers, etc) e a possibilidade de prever o comportamento e deformações em uma estrutura desse porte é de grande valia. Neste trabalho é feita a modelagem da percolação d\'água em meio poroso por meio do método dos elementos finitos, sem m

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12

Smith, S. J. "Novel alkyls, aryls and alkoxides of group 14 and 15 elements." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373133.

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13

Thorne, A. J. "Bivalent amides, alkyls, and aryloxides of the main group 4 elements." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373918.

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14

Lockwood, Cindy Louise. "Biogeochemical processes and trace element mobility in alkaline waste affected soils." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7555/.

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High pH leachates can mobilise oxyanion forming elements from alkaline waste, such as iron and steel slags and bauxite ore processing residue, into the wider environment. Red mud is a highly alkaline waste product from bauxite ore processing. It contains elevated concentrations of oxyanion forming elements such as Al, As, V and Mo that are mobilised at high pH together with other trace metals including Cu and Ni. The red mud spill at Ajka, Hungary released 1 million m3 of caustic red mud into the surrounding area. As part of the initial clean-up, some thinner red mud deposits (< 5 cm) were plo

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15

Emunds, Ronald Laauser. "Balanço de elementos não processáveis em uma fábrica de celulose." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266998.

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Orientadores: José Vicente Hallak d'Angelo, Marcelo Cardoso<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-16T11:11:44Z (GMT). No. of bitstreams: 1 Emunds_RonaldLaauser_M.pdf: 1808008 bytes, checksum: cc469195b9e12b310096a07506d0138c (MD5) Previous issue date: 2010<br>Resumo: Elementos não processáveis são definidos como sendo elementos cujos compostos não participam ativamente das diversas etapas do processo, porém seu acúmulo traz como conseqüência inúmeros distúrbios operacionais, tendo em vista a forma

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16

Hunter, Arlene Graham. "Element fluxes associated with co-existing tholeiitic and calc-alkaline magmas in Japan." Thesis, Open University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358817.

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17

Moore, Meghan. "Carbonatite-related rare-earth mineralization in the Bear Lodge alkaline complex, Wyoming: Paragenesis, geochemical and isotopic characteristics." ElSevier, 2014. http://hdl.handle.net/1993/23991.

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The Bear Lodge alkaline complex in northeastern Wyoming (USA) is host to potentially economic rare-earth mineralization in carbonatite and carbonatite-related veins and dikes that intrude heterolithic diatreme breccias in the Bull Hill area of the Bear Lodge Mountains. The deposit is zoned and consists of pervasively oxidized material at and near the surface, which passes through a thin transitional zone at a depth of ~120-183m, and grades into unaltered carbonatites at depths greater than ~183-190m. Carbonatites in the unoxidized zone consist of coarse and fine-grained calcite that is Sr-, Mn

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18

Fredrickson, Rie Takagi. "A new synthetic strategy for low-dimensional compounds : Lone pair cations and alkaline earth spacers." Doctoral thesis, Stockholm University, Department of Physical, Inorganic and Structural Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7284.

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<p>Complex transition metals oxyhalides containing a lone pair element, such as tellurium (IV), form an attractive research field because there is a high probability of finding new low-dimensionally arranged compounds and, particularly, a low-dimensionally arranged transition metals substructures, leading to interesting physical properties. Tellurium (IV) can drive the formation of many unusual structures because of its stereochemically active lone pair electrons, E. It commonly takes a coordination of three or four oxygen atoms to form either a TeO3E square pyramid or a TeO3+1E trigonal bipyr

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19

Posterlli, Mariana Corrêa. "Modelagem da expansão devido à reação álcali-agregado de concreto armado e reforçado com fibras." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-07032017-111040/.

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A reação álcali-agregado (RAA) é uma reação química complexa envolvendo os álcalis presentes no cimento Portland e minerais silicosos presentes em alguns tipos de agregados reativos. O produto dessa reação expande quando em contato com a água, causando fissuração e deformação, o que afeta a durabilidade e importantes propriedades mecânicas das estruturas de concreto. Entretanto, estruturas que estejam sob tensão de compressão, aplicada por carregamentos ou induzida pela presença de armadura, apresentam expansão reduzida na direção comprimida. Uma das ferramentas que se utiliza para a previsão

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20

Dodd, Zachary Caleb. "Petrogenesis and rare earth element economic potential of Pilot Knob, a Pliocene (?) alkaline intrusive complex in the Togwotee Pass region, northwestern Wyoming (U.S.A)." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20380.

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Master of Science<br>Geology<br>Matthew E. Brueseke<br>Previous K-Ar dating and petrography (Obradovich, 1978) have identified Pilot Knob as an ~3.4 (±0.06) Ma alkaline intrusive body. Bulk rock geochemistry obtained via XRF from four samples of Pilot Knob verifies the transitionally alkaline composition of the body, and new REE data also show enriched La, Ce, and Nd concentrations, consistent with rare earth element (REE) enrichment. Given the increased demand for REEs over the past ~30 years and China accounting for > 90% of global REE production (Kynicky, et al. 2012), it is important to

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21

Murgia, Fabrizio. "Eléments du block p comme matériaux d'électrode négative pour accumulateurs Magnésium-ion : mécanismes électrochimiques et performances." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT210/document.

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Parmi les défis que le Monde devra affronter dans les prochaines décennies, le plus difficile est l’utilisation d’énergie durable. Dans un scénario où les sociétés occidentales sont fortement dépendantes des combustibles fossiles pour garder leur niveau de bien-être (chauffage domestique, transport et production d’électricité), complété par les pays en voie de développement qui ont besoin d’alimenter leurs économies croissantes, il est nécessaire de souligner l’impact négatif sur l’environnement causé par l’utilisation de ces ressources fossiles mais aussi les problèmes géopolitiques pour les

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22

Siggelkow, Lisa [Verfasser], Thomas F. [Akademischer Betreuer] Fässler, and Wolfgang [Akademischer Betreuer] Domcke. "Synthesis, Characterization and Computational Studies of Binary and Ternary Intermetallic Compounds in the Systems Alkaline Earth Metal, Transition Metal, Tetrel Element / Lisa Siggelkow. Gutachter: Wolfgang Domcke. Betreuer: Thomas F. Fässler." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1029350175/34.

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23

Chamboredon, René. "Caractérisation et origine des magmas alcalins et des fluides sous le massif volcanique du Jbel Saghro, Anti Atlas, Maroc." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS070/document.

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Les laves alcalines sous-saturées riches en éléments volatils sont les marqueurs du rôle important des fluides dans le manteau et des interactions fluide-roche et magma-roche, processus clés pour comprendre la dynamique du manteau convectif et les interactions asthénosphère-lithosphère en domaine intracontinental. L’objectif de cette thèse est d’apporter de nouvelles contraintes sur la genèse des magmas alcalins en caractérisant les conditions de cristallisation, la source et les processus de fusion partielle à l’origine des néphélinites à olivine, des néphélinites à pyroxène et des basanites

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24

Hartig, Jens. "Numerical investigations on the uniaxial tensile behaviour of Textile Reinforced Concrete." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-66614.

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In the present work, the load-bearing behaviour of Textile Reinforced Concrete (TRC), which is a composite of a fine-grained concrete matrix and a reinforcement of high-performance fibres processed to textiles, exposed to uniaxial tensile loading was investigated based on numerical simulations. The investigations are focussed on reinforcement of multi-filament yarns of alkali-resistant glass. When embedded in concrete, these yarns are not entirely penetrated with cementitious matrix, which leads associated with the heterogeneity of the concrete and the yarns to a complex load-bearing and failu

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25

Lafay, Romain. "Séquestration des éléments mobiles durant la serpentinisation expérimentale en condition alcaline." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-01053911.

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La réaction de serpentinisation résulte de l'interaction de l'eau de mer, ou de fluides hydrothermaux avec les roches mantelliques. Elle engendre des changements de propriétés chimiques de la lithosphère océanique, avec notamment un enrichissement en éléments mobiles (ex. As, Sb, Li, Cs, Pb, et B). Ces éléments sont importants en sciences de la terre car ce sont des traceurs géochimiques des interactions fluides-roches depuis la ride océanique jusqu'aux zones de subduction. Cependant il existe peu d'études quantitatives s'intéressant à la séquestration de ces éléments durant la formation de se

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26

Bérard-Bergery, Micheline. "Contributions à l'étude du volcanisme triasique en Grèce : Implications géodynamiques." Nancy 1, 1986. http://www.theses.fr/1986NAN10001.

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Étude de différentes séries volcano-sédimentaires en zone pindique et sur des bordures (massifs du Lakmon, du Koziakas et du Vardoussia), en zone pelagonienne (ile d'Eubée), en zone Maliaque (Massif de l'Othrys) et dans le Dodécanèse (Iles de Tilos et de Rhodes). Dans chaque cas, un examen de l'environnement stratigraphique, ainsi qu'une étude pétrographique et géochimique des roches magmatiques permettent de définir les types de volcanisme suivant : calco-alcalin (massif d'Othrys, Eubée), transitionnel (massif d'Othrys, Eubée), alcalin (massif d'Othrys, Eubée, Dodécanèse). Plusieurs implicati

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27

Погребова, Інна Сергіївна. "Наукові основи створення синергетичних адсорбційних інгібіторів корозії поліфункціонального призначення". Doctoral thesis, Київ, 2021. https://ela.kpi.ua/handle/123456789/45499.

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Дисертація присвячена вирішенню важливої науково-технічної проблеми: підвищенню корозійної стійкості та експлуатаційно-технічних властивостей металевих виробів, устаткування та пристроїв шляхом використання синергетичних адсорбційних інгібіторів корозії широкого спектру захисної дії. Розроблено науково-обґрунтований підхід до створення ефективних інгібіторів корозії на основі поліфункціональних органічних сполук та комбінацій органічних сполук і солей металів. Підхід базується на комплексному дослідженні процесів адсорбції, встановленні взаємозв’язку між будовою органічних сполук, їх а

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Tang, Eng Hoo Joseph. "The Petrogenesis Of The Station Creek Igneous Complex And Associated Volcanics, Northern New England Orogen." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15902/1/Joseph_Tang_Thesis.pdf.

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The Station Creek Igneous Complex (SCIC) is one of the largest Middle-Late Triassic plutonic bodies in the northern New England Orogen of Eastern Australia. The igneous complex comprises of five plutons - the Woonga Granodiorite (237 Ma), Woolooga Granodiorite (234 Ma), Rush Creek Granodiorites (231 Ma) and Gibraltar Quartz Monzodiorite and Mount Mucki Diorite (227 Ma respectively), emplaced as high-level or epizonal bodies within the Devonian-Carboniferous subduction complex that resulted from a westward subduction along the east Australian margin. Composition of the SCIC ranges from monzogab

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Tang, Eng Hoo Joseph. "The Petrogenesis Of The Station Creek Igneous Complex And Associated Volcanics, Northern New England Orogen." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15902/.

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The Station Creek Igneous Complex (SCIC) is one of the largest Middle-Late Triassic plutonic bodies in the northern New England Orogen of Eastern Australia. The igneous complex comprises of five plutons - the Woonga Granodiorite (237 Ma), Woolooga Granodiorite (234 Ma), Rush Creek Granodiorites (231 Ma) and Gibraltar Quartz Monzodiorite and Mount Mucki Diorite (227 Ma respectively), emplaced as high-level or epizonal bodies within the Devonian-Carboniferous subduction complex that resulted from a westward subduction along the east Australian margin. Composition of the SCIC ranges from monzogab

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30

Hansen, James W. L. "The petrology, geochemistry and petrogenesis of the Goomboorian intrusive complex, southeast Queensland." Thesis, Queensland University of Technology, 1997.

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Miller, Sarah Ann. "Alkaline Earth Element Partitioning in Simplified Magmatic Systems." Thesis, 2007. https://thesis.library.caltech.edu/1779/7/Chapter1.pdf.

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Trace element distributions between mineral and melt phases have proven to be important recorders of igneous differentiation histories, but this utility depends on thorough understanding of their partitioning behavior. We propose a theory for crystal-melt trace element partitioning that considers the energetic consequences of crystal-lattice strain, of multi component major-element silicate liquid mixing, and of trace element activity coefficients in melts. We demonstrate application of the theory using newly determined partition coefficients for Ca, Mg, Sr, and Ba between pure anorthite and s

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Tzeng, Jiing Shan, and 曾景山. "Effects of acidic and alkali soils on the nutrient element and nces in the manures." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/18888984633285975315.

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Liu, Shih-Hsiang 1979. "Structural Assessment of D-Regions Affected by Alkali-Silica Reaction/Delayed Ettringite Formation." Thesis, 2012. http://hdl.handle.net/1969.1/148175.

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A combined experimental and analytical program was conducted to investigate the effects of Alkali-Silica Reaction (ASR) and Delayed Ettringite Formation (DEF) on D-regions in reinforced concrete (RC) bridge bents. Four large-scale RC specimens, which represent cantilever and straddle bents in Texas bridges in each specimen, were constructed. The first specimen represented the unexposed control specimen, while the other three were conditioned in the field with supplemental watering to promote ASR/DEF and served as the exposed specimens. The control and two exposed specimens with various leve

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Moller, Bruno. "The Essentials of Alkali Metals: A review of the field and advances towards a multi-element method." Master's thesis, 2022. http://hdl.handle.net/1885/264582.

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Alkali metal isotopes have become valuable geochemical tools in the last 20 years. Their simple chemistry with only one oxidation state, moderately volatile nature and lithophile nature make them ideal candidates to investigate processes across different settings. Their applications have varied from indicator of nebular and planetary differentiation, to weathering and anthropogenic input tracer. This development in the three multi- isotope alkali metals Li, K and Rb, can be mostly attributed to the success of multi- collector inductively coupled plasma mass spectrometry (MC-ICP-MS). At the adv

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Chou, Chih-Chien, and 周至謙. "Synthesis, Characterization of New Multinary Chalcogenides Containing Alkaline Metal Element." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/67310722178469859431.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>105<br>Ba12Sn4Se23 and SrCu2SiSe4 were synthesized by solid-state reaction. Both of them were characterized by X-ray diffraction to define their structures. Theoretical calculations determined their density of state, band structure and crystal orbital hamilton population (COHP). Ba12Sn4Se23 crystallizes in monoclinic space group P21/c (No. 14). With a = 27.8351 (3) Å, b = 12.8469 (2) Å, c = 32.28653 (5) Å, β = 25.437 (12)°, V = 4959.09(17) Å3 and Z = 4. The final R values are R1=0.0539, wR2=0.1055. The structure contains SnSe4 tetrahedral, diselenide Se22-, isolate

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Yun-Ying, Kung, and 龔芸瑩. "Identification and Characterization of Glucocorticoid Response Elements in Human Placental Alkaline Phosphatase Gene Promoter." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/68171474509852597603.

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碩士<br>國防醫學院<br>生物化學研究所<br>87<br>Human heat stable alkaline phosphatases are encoded by two closely related genes: the placental alkaline phosphatase (PAP), which specifies the term placental isozyme, and the germ cell alkaline phosphatase GCAP, which is expressed primarily in germ cells. In the human gastric cancer cell line TMK-1 cells, glucocorticoid exhibits an marked induction in the enzyme activity and accumulation of the mRNA of PAP. Analysis of mRNA stability and run on transcription demonstrated that glucocorticoid induction of PAP gene epxression occurs primarily at the level of trans

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Zhou, Chengchuan. "Enhanced Extraction of Alkaline Metals and Rare Earth Elements from Unconventional Resources during Carbon Sequestration." Thesis, 2019. https://doi.org/10.7916/d8-56d6-1q70.

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With the increase of the the global energy consumption has also been increasing, which is about 18 TW nowadays (Dudley, 2018), the anthropogenic CO2 emissions have also been increasing, which is about 410 ppm nowadays (Dudley, 2018; Tans & Keeling, 2019). Numerous evidences have been reported indicating that high atmospheric CO2 concentration can have significant greenhouse effect and thus lead to global warming and climate change (Pachauri et al, 2014; Hansen et al, 2013). Therefore, measures need to be taken to control and reduce the atmospheric CO2 concentration. In such circumstance,

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LI, YI-SIOU, and 李逸修. "Synthesis and Luminescent Properties of Alkaline Earth Metal Tellurite Phosphors Doped with Rare Earth Elements." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7xre9h.

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碩士<br>明新科技大學<br>化學工程與材料科技系碩士班<br>107<br>The main lattice material of this study is carbonate，Doping the activation centers: Tb3+, Gd3+, Ce3+, respectively, to prepare red, green, and blue primary color phosphors，The synthesis method is a wet method in a solid-phase synthesis method， and is heated to 900℃and 1400℃at a temperature increase rate of 10℃per minute in a high-temperature furnace, and the calcination is carried out for 10 hours while the calcination is completed. The phosphor powder is finished and tested. The crystal structure is detected by X-ray diffraction (XRD), and the excitatio

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Schwartze, Wieland [Verfasser]. "Die zelluläre Kontrolle der PLA2-Aktivität : ein Element des Signaltransfers zur Auslösung der Alkaloid-Biosynthese in Eschscholzia californica / von Wieland Schwartze." 2007. http://d-nb.info/985938471/34.

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Φωτοπούλου, Μαρία. "Εκτίμηση της κινητικότητας των ιχνοστοιχείων του λιγνίτη, της ιπτάμενης τέφρας και της τέφρας εστίας των περιοχών Yatagan και Milas (Τουρκία) σε όξινο και αλκαλικό περιβάλλον". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2530.

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Μία από τις σημαντικότερες αποθέσεις λιγνίτη της Δυτικής Τουρκίας εντοπίζεται στην λεκάνη της Mugla. Η λεκάνη της Mugla αποτελείται από δύο τάφρους ΒΔ-ΝΑ διεύθυνσης, οι οποίες χωρίζονται από μία πλατιά έξαρση του υποβάθρου, δημιουργώντας τις υπολεκάνες του Yatağan και του Milas. Η εμφάνιση του υποβάθρου αποτελείται στα νότια από τα Λυκκιακά καλύμματα, τα οποία περιλαμβάνουν ένα σύμπλεγμα πετρωμάτων ωκεάνιας και ηπειρωτικής προέλευσης και στα βόρεια από μεταμορφωμένα πετρώματα, όπως σχιστόλιθοι, γνεύσιοι, αμφιβολίτες, και μάρμαρα της Μάζας Menderes. Η παρούσα εργασία εστιάζει στο λιγνίτη της

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Morifi, E. L. "Cobalt and cadmium chalcogenide nanomaterials from complexes based on thiourea, urea and their alkyl derivatives : synthesis and characterization." Thesis, 2015. http://hdl.handle.net/10352/302.

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M. Tech. (Department of Chemistry, Faculty of Applied and Computer Science), Vaal University of Technology<br>Cadmium and cobalt complexes of urea and thiourea were synthesized using ethanol as a solvent. All complexes were refluxed at 70 - 80 °C, left to cool at room temperature, washed with methanol and acetone to remove impurities and dried at an open environment. The characterization of complexes was done using FTIR spectroscopy, elemental analysis and TGA. The complexes were found to coordination with the ligands through sulphur and oxygen atoms to the metal, instead of nitrogen. These we

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BONECHI, BARBARA. "High pressure experiments on kinetic and rheological properties of primitive alkaline magmas: constraints on deep magmatic processes at the Campi Flegrei Volcanic District." Doctoral thesis, 2021. http://hdl.handle.net/11573/1515460.

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Defining the timescales of magma storage and ascent beneath active volcanoes is a fundamental tool in volcanological investigation of the last decade to constrain pre-eruptive magmatic processes and magma chamber dynamics, since it is able to provide the basis for volcanic hazard assessment. This Ph.D. project focuses on the investigation of the deep portion of the Campi Flegrei Volcanic District plumbing system (crustal-mantle boundary; ~25 km of depth), in correspondence of which the presence of a possible crystallization zone has been hypothesized on the basis of melt inclusion studies, sei

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Hartig, Jens. "Numerical investigations on the uniaxial tensile behaviour of Textile Reinforced Concrete." Doctoral thesis, 2010. https://tud.qucosa.de/id/qucosa%3A25532.

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In the present work, the load-bearing behaviour of Textile Reinforced Concrete (TRC), which is a composite of a fine-grained concrete matrix and a reinforcement of high-performance fibres processed to textiles, exposed to uniaxial tensile loading was investigated based on numerical simulations. The investigations are focussed on reinforcement of multi-filament yarns of alkali-resistant glass. When embedded in concrete, these yarns are not entirely penetrated with cementitious matrix, which leads associated with the heterogeneity of the concrete and the yarns to a complex load-bearing and failu

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