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Tesi sul tema "Minor elements"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 gennaio 2023

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1

Larouche, Pascal. "Minor elements in copper smelting and electrorefining." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33978.

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Minor element (As, Sb, Bi, Pb, Ni) behavior, control and removal techniques in the conventional copper smelting/electrorefining process was studied. The analysis was based on the information collected from an exhaustive literature review, the visit of 23 smelters, 14 electrorefineries and consultations at 15 different institutes specialized in the field.<br>Data was collected for several types of matte smelting furnaces such as Outokumpu flash, INCO flash, Mitsubishi S-furnace, Teniente Converter, Noranda Process Reactor, Isasmelt and reverberatory. Behavior in Peirce-Smith converting furnaces

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2

Luganova-Chnyrenkova, Tatiana. "Factors affecting behaviour of minor elements in dore metal-soda slag partitioning." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26404.

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A series of experiments determined the influence of oxygen partial pressure and SiO$ sb2$ content in soda slag on the distribution of metals between soda slag and dore metal. Oxygen partial pressure ranged from 10$ sp{-8}$ to one atmosphere and the SiO$ sb2$ content from 0 to 10 wt%.<br>Minor elements, including the precious metals, partition between the dore metal and the soda slag. The main purpose of this research was to determine the process parameters which influence this distribution, and the nature and forms of the precious metals in the metal and in the slag phases.<br>From the results

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3

Lee, Rena J. "Study of trace and minor elements in ALS (amyotrophic lateral sclerosis) patients." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36492.

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4

Du, Toit Adam Jacobus. "Thermodynamic behaviour of sulphur and chlorine as minor elements in metallurgical melts." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/5379.

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Includes bibliographical references (p. 137-147)<br>This thesis is presented on the equilibrium studies that have been carried out on a series of slags, specifically chosen to cover the range of composition and conditions appropriate to the melters of the platinum group metals (PGM) producers of South Africa. New measurements have been made on the ferric to ferrous ration, sulphide capacity as well as the chloride capacity mainly for the PGM melter-type slags.

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5

Cao, Qianwen. "Mass Balance of Major, Minor and Trace Elements During AFBC Combustion of Fuels." TopSCHOLAR®, 1997. http://digitalcommons.wku.edu/theses/899.

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The proposed ASTM procedures for the determination of 13 major and minor., and 11 trace elements, in solid coal and coke combustion residues by inductively coupled plasma-atomic emission spectrometry (ICP-AES) were checked for routine use. In this study, the ICP analysis values and XRF analysis values of major and minor elements in two kinds of coal and two kinds of limestone were compared. It was shown that over 95% closure of the mass balances of the 24 major, minor, and trace elements was obtained with the proposed ASTM procedure. Also, it was demonstrated that trace elements may be lost th

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6

COSTA, ISOLDA. "Effect of minor addition elements on the corrosion behaviour of bare and coated steels." reponame:Repositório Institucional do IPEN, 1991. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10281.

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Made available in DSpace on 2014-10-09T12:36:50Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:56:00Z (GMT). No. of bitstreams: 1 04366.pdf: 5734662 bytes, checksum: 226af9141e1984ce9dff1230b5f437ed (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>University of Manchester, England

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7

Anttila, S. (Severi). "Influence of minor elements on some weldability issues of intermediate purity stabilized ferritic stainless steels." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219738.

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Abstract Stabilized ferritic stainless steel grades are attractive alternatives to common austenitic grades in sheet metal applications. Compared with older unstabilized ferritic grades, the mechanical and corrosion properties are usually improved. The impurity level, mainly the amount of interstitial carbon and nitrogen, plays an important role in these steels. There are notable issues in the welding of these steels, the most apparent difference to austenitic steels is the susceptibility to brittle failure. This research focused on the influence of minor elements, especially aluminium, calciu

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8

Stewart, Andrew John. "Planetary cores : effect and behaviour of minor elements on the Fe-S system to 40 GPa /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16815.

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9

Laban, Kay. "The development and application of methods for investigating the distribution of minor and trace elements in coal." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287238.

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10

Chi, Xiaoliu. "Development of Methods for the Determination of Major and Minor Elements and Hydrocarbon Residues in Solid Combustion Products." TopSCHOLAR®, 1997. http://digitalcommons.wku.edu/theses/772.

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Methods for the determination of inorganic constituents in coal fly ash by glow discharge spectrometry (GDS) and for the extraction of the organic compounds from coal and ash by supercritical fluid extraction (SFE) at temperatures below 150°C are reviewed. The inorganic elements studied included Al, Ca, C, Cu, Fe, Mg, Mn, P, S, Si and Ti. The organic compounds were measured by weight loss of the sample. The goal of this research was to find easier and faster ways to measure the concentration of inorganic elements in coal ash and to measure extractability of the coal itself, to make coal conver

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11

Gumbmann, Eva Maria. "The effect of minor alloying elements (Mg, Ag, Zn) on the nucleation and precipitation behaviour in AlCuLi alloys." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI092.

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Les alliages Al-Cu-Li sont particulièrement attractifs pour les applications aéronautiques du fait de leur faible densité, haute limite d'élasticité et bonne ténacité. Ils reçoivent une attention particulièrement importante actuellement, depuis le développement de la troisième génération qui contient des concentrations relativement élevées pour le cuivre et relativement basses pour le Li. Ces nouveaux alliages sont caractérisés par une dureté élevée, une bonne résistance à la fatigue et une bonne stabilité thermique. La phase principale de durcissement est la phase T1 – Al2CuLi qui se présente

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12

Medeiros, Rina Lourena da Silva. "Avalia??o das condi??es qu?mica e f?sica dos sedimentos do estu?rio Jundia?-Potengi." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17612.

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Made available in DSpace on 2014-12-17T15:41:46Z (GMT). No. of bitstreams: 1 RinaLSMpdf.pdf: 3452236 bytes, checksum: 7d7e19e1df71d1563d94e1dd5d766bbb (MD5) Previous issue date: 2009-02-27<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The aim of this study was to quantify the presence of major and minor elements in the sediments of the Jundia?-Potengi estuary, bordering the municipalities of Maca?ba, Natal and S?o Gon?alo do Amarante in the state of Rio Grande do Norte, Brazil, considering the evidence of anthropic activity along this estuary, resulting in pollution by tr

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13

LEITE, TACITO DANTAS FROTA. "DETERMINATION OF MAJOR, MINOR AND TRACE ELEMENTS IN ROCK SAMPLES BY LA-ICPMS AFTER TARGET PREPARATION BY FUSION WITH LITHIUM BORATES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8759@1.

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PETRÓLEO BRASILEIRO S. A.<br>A determinação de elementos traços em amostras de rocha por espectrometria de massas, combinada com ablação a laser (LA-ICPMS), tem se tornado uma importante ferramenta nas investigações em petrogênese, metalogênese e na prospecção de minérios. Apesar do surgimento de uma nova geração de lasers com menor duração de pulso (fs) e comprimento de onda (<266 nm), a calibração é ainda um ponto crítico, pois em geral, não há padrões disponíveis com matriz semelhante. Uma das interferências não espectrais mais relevantes em LA-ICPMS é o fracionamento químico, o qual

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14

JUNIOR, RAINERIO ESCALFONI. "DETERMINATION OF MINOR AND TRACE ELEMENTS IN ROCK SAMPLES BY LA-ICPMS: PROGRESS IN THE UTILIZATION OF BORATE GLASSES AS TARGETS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15411@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>A presente dissertação é uma continuação de pesquisas desenvolvidas por Leite (2006) visando à análise multielementar de rochas (basaltos, obsidianas e folhelhos) por espectrometria de massa com plasma indutivamente acoplado (ICPMS), em combinação com ablação a laser (LA) e utilizando-se vidro borato como alvo de análise. Como no trabalho anterior, os experimentos foram realizados com um sistema LSX-100 (CETAC) acoplado ao espectrômetro Elan 6000 ICPMS (PerkinElmer-Sciex). Como gases carreadores na câmara de ablação foram testados gases pur

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15

Johnston, Murray. "Thermodynamics of selenium and tellurium in molten metallurgical slags and alloys." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0064.

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There are a number of impurity elements present in sulphide ores that can have a deleterious effect on the properties of the final copper metal product. In this thesis, an equilibrium distribution technique was used to determine the thermodynamic behaviour of selenium and tellurium in molten slags used in copper production. Calcium ferrite based slags and copper or silver alloy were equilibrated in magnesia crucibles at temperatures of 1200 to 1400 °C and oxygen partial pressures of 10-11 to 10-0.68 atm. Under conditions typical of those employed during copper converting, the minor elements we

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16

Choi, Yun Jung. "The use of the Polish folk music elements and the fantasy elements in the Polish fantasy on original themes in G-sharp minor for piano and orchestra, opus 19 by Ignacy Jan Paderewski." Thesis, Lecture recital, recorded Mar. 6, 2006, in digital collections. Access restricted to the University of North Texas campus connect to online resource, 2007. http://digital.library.unt.edu/permalink/meta-dc-3690.

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17

Eastell, Julie. "A low dilution fusion technique for the determination of major, minor and trace elements in Lamproite and Kimberlite samples by X-ray fluorescence spectrometry." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/21888.

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Bibliography: pages 200-204.<br>A low dilution fusion technique using a 2:1 flux:sample ratio has been developed for the accurate determination of major, minor and trace elements by x-ray fluorescence spectrometry (XRFS). This method has been used to analyze geological samples of widely varying and unusual composition such as lamproites and kimberlites. The results are shown to be of comparable if not better accuracy than other methods of sample preparation for XRFS. Analytical conditions, including corrections for spectral line interferences are reported for all the elements determined. For m

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18

Al-Ebraheem, Alia. "Measurement of Levels and Distribution of Important Trace and Minor Elements and the Investigation of their Role in Cancer using X-ray fluorescence and X-ray Absorption Techniques." Thesis, City University London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521080.

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19

da, Silva Ashley. "Investigation of Cretaceous Molluscan Shell Material for Isotopic Integrity: Examples and Implications from the Baculites compressus/cuneatus Biozones (Campanian) of the Western Interior Seaway." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3921.

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Whether a global greenhouse interval is a distinct or distant future, it is important to understand the dynamics of a greenhouse system. During such intervals the oceans, in the absence of sizeable polar ice caps, flood the continental shelf. The stratification and circulation of these epicontinental seas are open to debate, because there are no Recent analogs. The carbon and oxygen stable isotope record of fossil molluscan shell from epicontinental seas has the potential to reveal their stratification and seasonal cycles. Whether a global greenhouse interval is a distinct or distant future, i

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20

Mazaltarim, Daniel. "Geochimie des cuirasses ferrugineuses et bauxitiques de l'afrique occidentale et centrale." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13090.

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Dans les pays tropicaux d'afrique ou regnent des climats chauds et humides, le substratum rocheux est separe de la surface par une epaisse couverture lateritique, parfois coiffee d'un niveau tres riche en fer et indure appele cuirasse. Le but de ce travail est, sur la base d'un modele d'enfoncement vertical des paysages lateritiques, de comprendre par quels mecanismes les caracteres chimiques, mineralogiques ou texturaux des materiaux parentaux peuvent se perpetuer ou disparaitre au cours de l'alteration. La prospection geochimique des ressources minerales du substratum rocheux des pays d'afri

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21

Pei, Yushu. "An Analysis of the Attempted Amalgamation of Western and Chinese Musical Elements in Huang Anlun's Piano Concerto in G Minor, Opus 25b, a Lecture Recital, Together with Three Recitals of Selected Works by Bach, Beethoven, Chopin, Liszt, Mozart, Schubert, and Schumann." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc935793/.

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While China possesses one of the world's richest musical heritages, it remained unaffected by Western music until early in this century. Subsequently, there was a movement of nationalism in music approximately three decades after the introduction of Western music. This movement, aimed at utilizing Western compositional techniques to create musical works that still would be uniquely Chinese, continues even today. Huang's piano concerto was written in 1982, just a few years after the Cultural Revolution. At the time, most Chinese composers were "handicapped" by their lack of knowledge of Western

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22

Gordon, Christopher Paul. "Major, minor and trace element geochemistry of Taiwan bedrock /." Connect to resource, 2006. http://hdl.handle.net/1811/21998.

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23

KATTAN-ZUHAIR. "Geochimie et hydrologie des eaux fluviales des bassins de la moselle et de la mossig : transports dissous et particulaire, cycles biogeochimiques des elements." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13050.

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Une importance particuliere a ete apportee a la combinaison entre les informations hydrologiques et chimiques. En effet, le controle de la dynamique actuelle de transferts des elements vers les fleuves est fonction de variations hydroclimatiques qui reglent le cycle de l'eau. Rappelons les principaux resultats acquis. La particularite des bassins de la moselle et de la mossig vient de leur position geographique appartenant a la region dite temperee industrielle. L'etude des facteurs hydrologiques d'un bassin versant necessite une bonne connaissance de divers elements controlant le cycle de l'e

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24

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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25

Bouabsa, Lakhdar. "Intrusions granitiques à albite et topaze : Minéralisations stanno-wolframifères et altérations hydrothermales associées, l'exemple du hoggar central, Algérie." Nancy 1, 1987. http://www.theses.fr/1987NAN10329.

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Le présent travail met l'accent sur la dualité du magmatisme de cette région du Hoggar Central. Outre un granite banal à biotite (parfois amphibole) constituant l'ossature principale des granites post orogéniques (Taourirts), il est mis en évidence un type particulier de granite spécialisé à albite, topaze et protolithionite comme paragénèse I. Ce magmatisme évolué est sans liaison génétique avec le précèdent comme le soulignent les contacts intrusifs marqués par des stockscheiders et les discontinuités géochimiques au niveau des éléments majeurs et tracés. La liaison spatiale et génétique des

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26

Santos, Duilio Ferreira. "Elementos da teoria algébrica das formas quadráticas e de seus anéis graduados." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/45/45131/tde-22062016-104927/.

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Neste trabalho procuramos realizar uma apresentação autocontida sobre os conceitos da teoria algébrica de formas quadráticas e sobre os anéis graduados que surgiram no desenvolvimento desta teoria. Iniciamos procurando esclarecer o sentido da equivalência entre as várias acepções do conceito de forma quadrática. Após a apresentação de ingredientes e resultados geométricos, fazemos um extrato da teoria dos anéis de Witt, conceito que originou a moderna teoria algébrica de formas quadráticas. Disponibilizamos os elementos fundamentais para a formulação das teorias de cohomologia, nos concentrado

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27

YAMAMOTO, Koshi, Kango NAKAMARU, and Mamoru ADACHI. "Depositional environments of "accreted bedded cherts" in the Shimanto terrane, Southwest Japan, on the basis of major and minor element compositions." Dept. of Earth and Planetary Sciences, Nagoya University, 1997. http://hdl.handle.net/2237/2832.

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28

Balmelle, Laurent. "Etude de la série volcano-sédimentaire de La Chapelle-sous-Dun (Massif du Charollais, Nord-Est du Massif Central français)." Paris 6, 1986. http://www.theses.fr/1986PA066494.

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L'etude des formations volcaniques associees au bassin stephanien de la chapelle-sous-dun (charollais) permet de preciser les relations entre phenomenes magmatiques et post-magmatiques d'une part, et les indices ou anomalies geochimiques (u. F. ) d'autre part. Les formations volcaniques font partie d'un ensemble plutono-volcanique complexe. La localisation de ces phenomenes est guidee par le contexte structural et, en particulier, l'existence de zones de type pull-apart dans un contexte compressif generalise. Les phenomenes post-magmatiques, en particulier la devitrification des roches volcani

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29

Galdino, Luciano. "CALFRAC: Programa que quantifica o processo de cristalização fracionada e sua aplicação ao estudo de soleiras da Bacia do Paraná (Estado do Paraná)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-03012011-135433/.

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Foi desenvolvido um programa computacional escrito na linguagem de programação C++ denominado CALFRAC para quantificar o processo de cristalização fracionada em sistemas ígneos, utilizando para isso as concentrações dos elementos maiores, menores e traços. O algoritmo moderniza, torna mais eficiente e aprimora os programas publicados na literatura e possui a grande vantagem de poder calcular, automaticamente, todas as possíveis combinações de evolução das amostras envolvidas na diferenciação, além de associar aos cálculos os elementos-traço, os quais servem para confirmar os resultados sugerid

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30

Dekeyzer, Stefanie [Verfasser], Karin [Akademischer Betreuer] Zonneveld, and Simone [Akademischer Betreuer] Kasemann. "Minor element composition and stable oxygen isotopes of calcareous shells of the dinoflagellate Thoracosphaera heimii / Stefanie Dekeyzer. Gutachter: Karin Zonneveld ; Simone Kasemann. Betreuer: Karin Zonneveld." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1071992988/34.

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31

Schmitt, Jean-Michel. "Albitisation triasique, hydrothermalisme jurassique et alteration supergene recente. Metallogenie des gisements uraniferes du rouergue." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13173.

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Les concentrations uraniferes qui font l'objet de ce travail sont des gites multifissures, de paragenese simple, quasi monometallique, ou l'uranium s'exprime sous forme d'oxydes. Elles se localisent aussi bien dans le socle que dans les sediments permo-carboniferes et recoupent meme localement le contact socle-couverture. Dans les deux principaux secteurs mineralises, bertholene et brousse-broquies sont decrites respectivement l'albitisation d'un socle orthogneissique et celle d'une serie permo-houillere. La repartition precise des zones albitisees montre qu'elles constituent en fait les racin

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32

AZZILEY, AZZIBROUCK GEORGES. "Sedimentologie et geochimie du francevillien b (proterozoique inferieur). Metallogenie des gisements de manganese de moanda, gabon." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13041.

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33

Delaunay, François. "Etude de l'influence des éléments mineurs d'addition sur l'oxydation à haute température d'alliages base nickel." Rouen, 1997. http://www.theses.fr/1997ROUES029.

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La compréhension des phénomènes d'oxydation à haute température des alliages base nickel revêt un intérêt particulier pour l'industrie nucléaire. Les performances de ces alliages, tout comme celles des aciers, sont fortement influencées par les différents éléments mineurs d'addition. Six alliages commerciaux ont été traités entre 800°C et 1000°C sous air et étudiés à l'aide des méthodes d'analyse complémentaires suivantes : spectroscopie de photoélectrons induits par un rayonnement X, spectroscopie infrarouge à transformée de Fourier, diffraction des rayons X et microscopie électronique à bala

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34

Novák, Jan. "Analýza návrhových prvků okružních křižovatek v závislosti na nehodovost." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-390280.

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The dissertation deals with the analysis of roundabout design elements and their impact on accidents. The analysis objective was to identify the important elements of roundabouts that have impact on accidents. In order to achieve this goal, the multifactorial statistical safety assessment method was used on the basis of a representative sample of data, by developing several safety performance functions, verifying them and interpreting the result. Several design elements, which from the point of view of the traffic accident mechanism belong to the infrastructure factor, have been identified: AA

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35

劉昇明. "Daily dietary intake of minor and trace elements." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/72123122907956975513.

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36

Chang, Che-Ming, and 張哲銘. "Effect of minor elements on the hot deformation behaviours of a superalloy." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/b6c5h3.

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碩士<br>國立清華大學<br>材料科學工程學系<br>102<br>Incoloy A-286 is a Fe-Ni based superalloy and it is widely used in gas turbine industry, jet engines and other applications. Although A-286 has a long service history, the fabrication of A-286 is not without any challenges. The hot deformation property for this alloy is highly sensitive to its composition, especially the content of impurity such as sulfur (S). In present study, a batch of A-286 has suffered from cracking issue during rolling process at high temperature and detailed examinations have revealed that phenomena of liquation of Ti-rich phase induce

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37

"Armenian Folk Elements in Arno Babajanian's Piano Trio in F-Sharp Minor." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.38625.

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abstract: Armenian music has a rich history. It started as independent, monodic song, and succeeded in keeping its uniqueness from the influences of other countries' musical traditions. During the nineteenth century the great Armenian musicologist and composer Komitas started to travel and write down these songs from Armenian villages. Komitas, who had higher education in Western classical music, was one of the first composers to harmonize Armenian songs and sacred music using Western classical techniques. This was a milestone in the development of Armenian music. Arno Babajanian was a Soviet

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George, L. L. "Trace and minor elements in galena: a reconnaissance LA-ICP-MS study." Thesis, 2013. http://hdl.handle.net/2440/100088.

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This item is only available electronically.<br>Many minor/trace elements can substitute into the crystal lattice of galena at various concentrations. In-situ LA-ICP-MS analysis and trace element mapping are used to obtain minor/trace element data from a range of natural galena specimens aiming to enhance understanding of the governing factors that control minor/trace element partitioning. The coupled substitution Ag+ + (Bi, Sb)3+ ↔ 2Pb2+, is confirmed by data obtained, although when Bi and/or Sb are present at high concentrations (~> 0.002 mol.%), site vacancies most likely come into play th

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Lockington, J. A. K. "Trace and minor elements in sphalerite: an assessment of distributions in metamorphosed deposits." Thesis, 2012. http://hdl.handle.net/2440/92909.

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This item is only available electronically.<br>Sphalerite is a common sulphide mineral and occurs in ore deposits of various types. It is the major ore mineral in the majority of Zn-Pb sulphide deposits. The emergence of precise, high-resolution microanalytical methods, such as Laser-Ablation Inductively-Coupled-Plasma Mass-Spectrometry (LA-ICP-MS) has allowed for greater precision in the analysis of the minor and trace elemental characteristics of sulphides, including sphalerite. These methods have evolved to become valuable petrogenetic tools over the past decade. In this study Laser-Ablatio

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Potgieter, Sanja Steyn. "The determination of major, minor and trace elements in cement and cement-related materials." 2002. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001453.

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D. Tech. Chemistry<br>The cement industry plays a major role in the world economy. Analytical techniques are central to its success. Many of the techniques currently in use, mainly wet classical methods, could be improved and optimized to increase economic benefits. The aim of this study was to identify and optimized selected analytical techniques. Four analytical methods were selected: the determination of available lime in lime, Cr(VI) in cement and cement-related materials, chloride in various cementitious materials as well as minor and trace elements in cement clinker and gypsum.

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Méndez, José Eduardo Valdez. "Numerical and experimental characterization of the interaction between major and minor axis joints." Master's thesis, 2017. http://hdl.handle.net/10316/97973.

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Dissertação de Mestrado em Construção Metálica e Mista apresentada à Faculdade de Ciências e Tecnologia<br>As ligações são uma parte essencial das estruturas metálicas. Há uma grande variedade de ligações metálicas utilizadas no sector da construção, tendo diferentes características e comportamentos mecânicos. É possível classificar as ligações de acordo com diferentes critérios e estudá-las de acordo com isso. Isto permite o estudo aprofundado das ligações que partilham caraterísticas similares, usando métodos analíticos, experimentais e numéricos.Este trabalho apresenta a caracterização expe

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Méndez, José Eduardo Valdez. "Numerical and experimental characterization of the interaction between major and minor axis joints." Master's thesis, 2017. http://hdl.handle.net/10316/87287.

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Dissertação de Mestrado em Construção Metálica e Mista apresentada à Faculdade de Ciências e Tecnologia<br>As ligações são uma parte essencial das estruturas metálicas. Há uma grande variedade de ligações metálicas utilizadas no sector da construção, tendo diferentes características e comportamentos mecânicos. É possível classificar as ligações de acordo com diferentes critérios e estudá-las de acordo com isso. Isto permite o estudo aprofundado das ligações que partilham caraterísticas similares, usando métodos analíticos, experimentais e numéricos.Este trabalho apresenta a caracterização expe

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SHA, JIAN-GUO, and 沙建國. "The effects of minor elements on the laser beam welding characteristics of 304 stainless steel." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/04456298891164985459.

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Hsing-hui, Tsai, and 蔡幸慧. "Brahms Piano Quartet Op. 25 in G Minor, Mot. IV----A Discussion of Gypsy Music, including Elements and Style." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/19234508312454317703.

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Lou, H. T., and 駱新田. "Effects of Minor Elements Pb, Bi, Sb and Ce on the Microstructures and Mechanical Propertis of Heavy Section Dutile Cast Irons." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/97038483217925245444.

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碩士<br>國立臺灣大學<br>機械工程學系研究所<br>84<br>The effects of minor elements, i. e., Pb, Bi, and Sb, and Ce on the microstructures and mechanical properties of heavy section dutile cast irons were investigated in this study. The experimental results indicate that degenerate forms of graphite tend to precipitate in ductile iron castings that solidify over an extended period of time. Additions of small amoumts of minor elements, such as 0.005% Pb or 0.003% Bi or 0.008% Sb, result in increased nodule count and improved nodularity. However, substantial graphite deterioration occurs as the addition amounts of

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Mondol, Sukla. "Improving High Temperature Strength of 2219 Al Alloy by Minor Alloying Additions." Thesis, 2015. http://etd.iisc.ernet.in/2005/3755.

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Among Al alloys, 2219 Al alloy possesses highest strength at elevated temperatures. However, the application of this alloy is also restricted to a maximum temperature of 150°C, above which, the strengthening precipitates coarsen rapidly resulting in a steep loss in strength. In the present investigation, an attempt has been made to improve the elevated as well as the room temperature properties of commercial 2219 alloy by the addition of small amounts of Sc & Mg, Sc & Zr, and Nb & Zr, and these are designated as 2219ScMg, 2219ScZr and 2219NbZr alloys, respectively. All the three alloys were c

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Peng, Chun-Hao, and 彭俊浩. "Effect of non-equal molar AlCrFeMnNi high-entropy alloys on the precipitates and high-temperature-wear performance by addition of minor elements." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ft9cz7.

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"Determination of some minor elements in cement by energy dispersive x-ray fluorescence spectrometry and determination of mercury in water by static cold vapour atomic absorption spectrometry." Chinese University of Hong Kong, 1994. http://library.cuhk.edu.hk/record=b5887279.

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by Wong Chi Kin.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1994.<br>Includes bibliographical references (leaves 131-133).<br>Acknowledgement<br>Abstract --- p.1<br>General introduction --- p.4<br>Part I Determination of Some Minor Elements in Cement by Energy Dispersive X-Ray Fluorescence Spectrometry<br>Introduction --- p.7<br>Experimental --- p.14<br>Results and discussions --- p.18<br>Part II Determination of Mercury in Water by Static Cold Vapour Atomic Absorption Spectrometry<br>Introduction --- p.78<br>Experimental --- p.84<br>Results and discussions --- p.89<br>Conc

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Goso, Xolisa Camagu. "Identification of the sources of, and subsequent minimization of the uncertainties associated with the measurement of minor elements in PGM furnace matte by ICP-MS." Thesis, 2009. http://hdl.handle.net/10210/2350.

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M.Tech.<br>The Inductively Coupled Plasma Mass Spectrometry (ICP-MS) technique showed very high uncertainties associated with the determination of the concentrations of minor elements in the Platinum Group Metal (PGM) smelting plant samples. This project reports on the work done for the identification of, and subsequent minimisation of the sources of uncertainties associated with the measurements of minor elements in the PGM Furnace Matte material by ICP-MS. To perform these studies, Elan 6000, Shimadzu ICPM-8500 and Finnigan Element 2 ICP-M spectrometers were employed. Synthetic Furnace Matte

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Qin, Guoming. "Minor element behavior in the INCO CRED process." Thesis, 2005. http://hdl.handle.net/2429/16225.

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In LNCO's Copper Refinery Electrowinning Department (CRED) the copper sulfide residue containing precious metals (referred as the first stage cake), is subjected to an oxidative pressure leach. The leach - referred as second stage leaching, produces a copper sulfate solution and basic copper sulfate. The basic copper sulfate is releached with spent electrolyte from copper electrowinning containing sulfuric acid to produce impure copper sulfate solution and a precious metals residue. A sample of first stage cake from INCO CRED was shipped to UBC and treated under second stage leaching co

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