Acceder

Bibliografías temáticas / Lead / Tesis

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Lead.

Tesis sobre el tema "Lead"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores tesis para su investigación sobre el tema "Lead".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Lydon, P. "The simultaneous electrodeposition of lead and lead dioxide." Thesis, London Metropolitan University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373911.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Zubikarai, Iturralde Nerea. "Lean management´s impact on lead time of ETO processes." Thesis, Tekniska Högskolan, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-50590.

Texto completo

Resumen

Lean management is considered a key to lead time reduction while being efficient, in order to survive in the actual market. Despite this, there is relatively little research done about implementation of lean management in ETO processes. Knowing that ETO processes are a reality in the industry, because there is a demand of customized products in the market. Nonetheless, the early phases of the ETO processes are critical. The purpose of this study was therefore to investigate how lean management can be used to understand and early phases of ETO processes, in order to evaluate potential lead time

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Mohammadi, Abdulreza Tabe. "Electrochemistry of lead and lead alloy anodes in lead-acid batteries for photovoltaic energy storage." Thesis, University of Ottawa (Canada), 1991. http://hdl.handle.net/10393/7884.

Texto completo

Resumen

The performance of lead-acid batteries for energy storage in photovoltaic/diesel/battery hybrid systems strongly depends on several electrochemical and/or operational factors such as the alloying elements incorporated in the electrode plates, the addition of expander materials to the anode or to the electrolyte, temperature, and the charging regime of the battery. In this study, the influences of the above mentioned factors on battery performance were investigated using cyclic voltammetry and potentiostatic transient techniques supplemented by surface analysis techniques including scanning ele

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Fleming, David E. B. "Human lead metabolism : chronic exposure, bone lead and physiological models /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/NQ42735.pdf.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Hendricks, Warren Charles. "Metallorganic chemical vapor deposition of lead oxide and lead titanate." Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/41492.

Texto completo

Resumen

The purpose of this study was two-fold: firstly, the MOCVD deposition behavior of Pb(thd)2 was studied in detail and a one-dimensional kinetic model was proposed to successfully predict the effect of processing conditions on the deposition rate profile for PbO. Assuming the surface reaction is the rate-limiting step in the process, the effective activation energy for the process, Ea, was found to be 82 kJ/mol while the preexponential rate constant was found to be 33 g/cm2/min (0.15 moVcm2/min). The process was found to consistently produce a combination of the high temperature, orthorhombic mo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Holt, Adrian C. "The intestinal absorption of lead: the importance of lead speciation." Thesis, Aston University, 1988. http://publications.aston.ac.uk/14519/.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Schlesinger, Mark E. "LEAD OXIDE SOLUBILITY IN LEAD BLAST-FURNACE SLAGS (ACTIVITY, THERMODYNAMICS)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291261.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Aronoff, Leya. "Dynamic Motivation to Lead: Construct Validity of Motivation to Lead." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/cmc_theses/2254.

Texto completo

Resumen

Although motivation to lead (MTL) was characterized as stable, recent research suggested otherwise. This study explored the malleability of MTL and its predictors. Individuals with high affective-identity MTL are motivated to lead because they enjoy leading. Individuals with high social normative MTL are motivated by an obligation to lead. Individuals with high noncalculative MTL are drawn to leadership because they avoid weighing the costs and benefits of leading. Applicants to a California college were sent a questionnaire on MTL and leadership self-efficacy (LSE) (Time 1 assessment, N = 270

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

ZHANG, BAOWEI. "Surface Chemistry of Lead and Lead Free Metal Halide Nanocrystals." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1071937.

Texto completo

Resumen

In this thesis, the surface chemistry of different metal halide NCs were investigated. Two new synthesis approaches to produce LHP NCs were developed by employing phosphonic acids (either alkyl or oleyl PAs) as the sole surfactants. The NMR analysis of these samples indicated the steric binding state of PA. PA-capped NCs show near unity PLQY with uncommon truncated shape, and high stability against dilution. We also investigated the interaction between neutral ligands and LHP NCs. Among various neutral ligands, it was found out that oleyl PAs are able to strip a large fraction of original surf

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Still, Michael Charles William. "Roman lead sealings." Thesis, University College London (University of London), 1995. http://discovery.ucl.ac.uk/1317870/.

Texto completo

Resumen

This thesis is based on a catalogue of c.1800 records, covering over 2000 examples of Roman lead sealings, many previously unpublished. The catalogue is provided with indices of inscriptions and of anepigraphic designs, and subsidiary indices of places, military units, private individuals and emperors mentioned on the sealings. The main part of the thesis commences with a history of the use of lead sealings outside of the Roman period, which is followed by a new typology (the first since c.1900) which puts special emphasis on the use of form as a guide to dating. The next group of chapters exa

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Halici, Safak. "Development Of Lead Alloys For Valve-regulated Lead-acid (vrla) Batteries." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612422/index.pdf.

Texto completo

Resumen

In this study, Mg, Sn, Cd, Bi and Sb containing, five binary, three ternary and two quaternary different alloys to be used in a Valve-Regulated Lead-Acid (VRLA) batteries have been studied in terms of their mechanical and electrochemical properties. The investigated properties are hardness, passivity, corrosion rate, hydrogen gassing and the conductivity of the passive film. All electrochemical tests were carried out in 3.75 M H2SO4 solution by using open-circuit potential, anodic polarization, polarization resistance measurement and gas collection techniques. The results showed that while the

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Schreier, Martin, and Reinhard Wilhelm Prügl. "Extending lead user theory: Antecedents and consequences of consumers' lead userness." Wiley-Blackwell, 2008. http://dx.doi.org/10.1111/j.1540-5885.2008.00305.x.

Texto completo

Resumen

Lead users have been shown to be a highly promising source of innovation for generating radical new product ideas. According to lead user theory, these users are defined as being ahead of an important market trend and experiencing high benefits from innovating. There is strong empirical support that these users tend to come up with commercially attractive user innovations. Other than that, however, there is hardly any knowledge available which helps to describe and differentiate this "species" of user from more "ordinary" users. The present article aims to fill this gap and extends lead

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Zhou, Hengrui, and 周恆瑞. "Synthesis and characterization of lead compounds in waste lead battery treatment." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2015. http://hdl.handle.net/10722/212611.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Nell, Michael Paul. "Lead user screening and testing of lead user generated product concepts." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15122.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

French, Kyle J. "Growth of Optical Quality Lead Magnesium Niobate-Lead Titanate Thick Films." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575993750125728.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Luke, Colin G. "A study of factors associated with trends in blood lead levels in Port Pirie children exposed to home-based interventions /." Title page, contents and abstract only, 1991. http://web4.library.adelaide.edu.au/theses/09MPM/09mpml954.pdf.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Stålnacke, Emil. "Microstructure-corrosion interrelations in new low-lead and lead-free brass alloys." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217355.

Texto completo

Resumen

In new low-lead and lead-free brass alloys, it is not understood how the corrosion properties,such as dezincification, are related to material composition as well as annealing temperatureand duration. This study aims to fill this knowledge gap by mapping sixteen annealingconditions and three different brass alloy compositions to their respective microstructure anddezincification performance. It was found that high dezincification depth was a result ofannealing temperatures at 300°C – 400°C, which promoted precipitation of intermetallicAlAs-particles along grain boundaries, twins and lead parti

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Thiagarajan, Suraj Joottu. "Thermoelectric properties of rare-earth lead selenide alloys and lead chalcogenide nanocomposites." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196263620.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Thompson, Jessica Ann. "Determining the concentration and source of lead in chocolate using lead isotopes." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/114339.

Texto completo

Resumen

Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2007.<br>Cataloged from PDF version of thesis. Pages 81 and 87 missing from original thesis.<br>Includes bibliographical references (pages 86-91).<br>Single-origin dark chocolate samples derived from cocoa grown in developing countries from around the world were analyzed to determine their lead concentrations and the isotopic composition of the lead. The lead isotope ratios were compared with published data from aerosols and volcanic rocks nearest to the cocoa growing regions. Samples

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Thiagarajan, Suraj Joottu. "Thermoelectric properties of rare-earth lead selenide alloys and lead chalcogenide nanocomposites." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1196263620.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Weaver, Cameron L. "Lead silicate solubility and the control of lead contamination in drinking water." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040433/.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Zhu, Zangyuan. "Lead-free piezoelectric ceramics." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581971.

Texto completo

Resumen

Legislation arising from health and environmental concerns has intensified research into finding suitable alternatives to lead-based electroceramics. Lead zirconate titanate (PZT) has been developed over several decades to become the market-leading piezoelectric ceramic. Lead-free solid solutions based on sodium potassium niobate, Na0.5K0.5NbO3 (NKN), show promising dielectric and piezoelectric properties. 1-2 The related (l-x)( Na0.5K0.5NbO3)-xBiScO3 binary system (NKN-BS) has been reported to exhibit maximum d33 values of 200 pCIN at 2 mol% BS.3 Similarly, an optimal d33 value has been repor

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Weller, Sean David Tomey. "Lead-free solder technology." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/5575/.

Texto completo

Resumen

Aerospace applications typically require electronic products with not only higher levels of reliability than the consumer electronics industry but also longer service lives within demanding working environments. The transition will inevitably mean changes to design and manufacturing procedures, which is likely to incur a significant cost to the business. For example, the best candidate Pb-free solder alloys have been shown to require higher soldering temperatures and have higher surface tensions. Moreover, a reduction in product safety and reliability is not acceptable to the industry. This pr

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Jacox, Laura (Laura A. ). "Molecular toxicity of lead." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/114343.

Texto completo

Resumen

Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2008.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 23-28).<br>Introduction - Lead is a heavy metal that has been in use for over 8000 years (White, 2007). It was first smelted it 4000BC as a byproduct of silver processing. Since then, Pb has played a dynamic role in history, possibly contributing to the fall of the Roman Empire (Nraigu, 1983). Pb is a highly malleable and ductile Group IVa metal. It has been utilized in a variety of products i

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Birdwell, Kent N. "The Global Lead Programme." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/20892.

Texto completo

Resumen

Thesis (MBA)--Stellenbosch University, 2006.<br>This study project sets out to examine the validity of an idea - an idea to create a study-abroad programme complemented by combining studies with mission work for Christian university undergraduates. In support of this idea, this study researches the overwhelming arguments that would validate the programme. The study then looks into how the programme can be designed and what its desired focus should be. In this study, the author first examines the prominent external forces that justify the programmes' needs. Two prominent forces include t

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Droessler, Laura Melanie. "Lead oxides for photovoltaics." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:8a0216a2-3efe-4de4-a853-d5b6ec53eeee.

Texto completo

Resumen

This thesis investigates lead oxides as photovoltaic materials. Vacuum deposition methods and ex-situ annealing are used to produce different stoichiometries of lead oxide. The relationship between structure and the optoelectronic properties is then investigated. Following this, a number of photovoltaic devices are prototyped and a Kelvin probe used to determine and understand the band structure of devices. Thin films of PbO produced via air annealing of thermally evaporated lead consist of a mixture of two phases, orthorhombic and tetragonal, that determine the materials properties and effect

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Foley, Daniel Jason. "Realising lead-oriented synthesis." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/9222/.

Texto completo

Resumen

The concept of lead-oriented synthesis (LOS) seeks to address to the paucity of diverse compounds with appropriate properties for biological screening. This thesis focuses on the preparation of diverse scaffolds, which, following decoration, may provide access to lead-like compounds. Key polyfunctionalised building blocks were prepared to enable the synthesis of such scaffolds by applying small tool-kits of robust synthetic methodologies. Computational tools were used to guide the development of key methodologies and to target the preparation of specific scaffolds. In addition, computational t

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Anson, Scott J. "Analysis of lead free tin-silver-copper and tin-lead solder wetting reactions." Diss., Online access via UMI:, 2007.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Neiström, Linda. "Characterisation of Used Lead-Acid Batteries for Feed Optimisation in Secondary Lead Production." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70740.

Texto completo

Resumen

Used lead-acid batteries are the main raw material in secondary lead production. Technologicalprogress in the car industry, have raised concerns regarding the lead-acid battery’s leading positionas electrochemical storage system in the future. However, the lead-acid battery industry isadvancing with innovations, such as hybrid and micro-hybrid vehicles, and is believed to have acontinued important role in the rechargeable battery market. Lead is one of the most investigatedmetal due to concerns from society regarding the negative effect on human health and theenvironment. Consequently, that ha

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Stinson-Bagby, Kelly Lucile. "Microstructural Evolution in Thermally Cycled Large-Area Lead and Lead-Free Solder Joints." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34573.

Texto completo

Resumen

Currently, there are two major driving forces for considering alternative materials to lead- based products, specifically interconnections, in electronics applications, including the impending legislation or regulations which may tax, restrict, or eliminate the use of lead and the trend toward advanced interconnection technology, which may challenge the limits of present soldering technology. The reliability of solder joints is a concern because fracture failures in solder joints accounts for 70% of failures in electronic components. Lead-free solders are being investigated as replaceme

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Joshi, Rahul V. "Thermo-mechanical behavior of tin-lead and lead-free ceramic column grid array packages." Diss., Online access via UMI:, 2005.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Jönsson, Johanna, and Melinda Luong. "Reducing Supplier Lead Time : - A case study on Supplier Lead Time at purchasing companies." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-48474.

Texto completo

Resumen

Title: Reducing Supplier Lead time – a case study on Supplier Lead Time at purchasing companies Authors: Johanna Jönsson and Melinda Luong Tutor: Dr. Åsa Gustavsson Examiner: Dr. Lars-Olof Rask Course code: 4FE06E - Master Thesis _________________________________________________________________________ Research questions: ● How are companies working with and defining Supplier Lead Time? ● What activities are included to reduce Supplier Lead Time? ● How can companies further develop their work to reduce Supplier Lead Time? Purpose: The purpose of this Master Thesis is to describe and exp

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Manmee, Charuwan. "Lead levels in teeth as a measure of life-time lead exposure in children." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/2177.

Texto completo

Resumen

Background and aims Lead exposure has irreversible health effects in children who are susceptible even at very low levels of exposure. The usual test for lead exposure is blood lead level (BLL), but this indicates only recent exposure. This study aimed to ascertain the suitability of milk teeth as biomarker of the history of lead exposure and to develop a methodology for this novel biomarker. Methods My study comprised three stages: Firstly, I explored potential determinants of dentine lead levels (DLLs) in children living in Newcastle upon Tyne (the Tooth Fairy Study). Secondly, I developed a

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Shimmield, Tracy Marjory. "A study of radionuclides, lead and lead isotope ratios in Scottish sea loch sediments." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/9988.

Texto completo

Resumen

This research involved the study of sediment cores from Loch Etive, Loch Long, Loch Goil and Loch Fyne with the aims of investigating the geochemistry of natural, and manmade radionuclides and heavy metals within the sea loch environment. The main aims of the research were to determine accumulation rates and the extent of mixing within these sediments and to assess the fluxes, sources and temporal variations in input of pollutant heavy metals to these environments. In recent years it has been suggested that Pb is mobile in sea loch sediments which questions the validity of applying ²¹⁰Pb datin

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Challapalli, Dharmendra, and Ahmad El-masri. "Study and analysis of surface layer characteristics of lead brass and lead free brass." Thesis, Högskolan i Halmstad, Maskinteknisk produktframtagning (MTEK), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-32207.

Texto completo

Resumen

The addition of lead to the copper alloys increase the machinability of thework material (without reference here to environmental factors) and reduces the overall production cost of the components at different stages, despite copper being expensive, which makes a challenging task to replace lead. Since lead is dangerous to human health. Many materials are considered to replace lead in brass and silicon is one of the alternative. This thesis characterizes the lead and the lead free brass's surfacemetallurgy for a certain cutting data. The study includes identification of alteredmaterial zones (

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Etminan, Ali. "Prediction of Lead Conversion With Imbalanced Data : A method based on Predictive Lead Scoring." Thesis, Linköpings universitet, Statistik och maskininlärning, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176433.

Texto completo

Resumen

An ongoing challenge for most businesses is to filter out potential customers from their audience. This thesis proposes a method that takes advantage of user data to classify po- tential customers from random visitors to a website. The method is based on the Predictive Lead Scoring method that segments customers based on their likelihood of purchasing a product. Our method, however, aims to predict user conversion, that is predicting whether a user has the potential to become a customer or not. Six supervised machine learning models have been used to carry out the classifica- tion task. To acc

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Namboodri, Chettoor G. "Experimental investigation and modeling of the electrostrictive relaxor ferroelectric lead magnesium niobate-lead titinate." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07212009-040304/.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Bergdahl, Ingvar A. "Lead in blood ICP-MS studies of lead in plasma, blood and erythrocyte proteins /." Lund : Dept. of Occupational and Environmental Medicine, Institute of Laboratory Medicine, Lund University, 1997. http://catalog.hathitrust.org/api/volumes/oclc/39159416.html.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Dooley, Joan Mary 1961. "LEAD MOBILIZING ACTIVITY OF DMPS, DMSA, AND DMPA FOLLOWING ORGANIC AND INORGANIC LEAD EXPOSURE." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275507.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Haner, Andrew Lloyd. "Iola, Kansas residential lead contamination." Thesis, Wichita State University, 2007. http://hdl.handle.net/10057/1536.

Texto completo

Resumen

In the late 1800’s and early 1900’s lead and zinc mining became prominent in Kansas, Oklahoma, and Missouri. With no knowledge of the effects that would impact the future, the mining companies continued to strip the land. With the discovery of lead and zinc ores in southeast Kansas, southwest Missouri, northeast Oklahoma in the late 1800’s a way to process the ores in a cheap way was needed. Natural gas in locations like Iola Kansas helped led to cheap ore processing and smelting. After the cheap fuel for the processing began to diminish in the early 1900’s, the multitude of smelters began to

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Vineberg, Daryl Geoffrey. "A study of lead softening /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80149.

Texto completo

Resumen

Softening represents one of the stages in the pyrometallurgical refining of lead, in which oxygen is top-blown into a bath of impure bullion through a group of lances in order to preferentially oxidize arsenic, antimony and tin dissolved in the melt. The oxides of these species float to the melt surface, where they are removed as dross.<br>It has been observed at Teck Cominco Lead Operations in Trail, BC that there is an "ignition temperature" in the range of 600°C, below which the softening reactions are reported to occur very slowly, if at all. Currently, disproportionately large effo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Mossman, Susan. "Mycenaean Lead: Archaeology and Technology." Thesis, University of Birmingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508338.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Anjos, Mafalda Goulão Escaleira dos. "Philips Sweden - From led to lead." Master's thesis, 2014. http://hdl.handle.net/10362/21386.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

曾琪婷. "Characterization of lead isotopes distribution of ingested lead dust from lead battery plant." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/81121335782714387771.

Texto completo

Resumen

碩士<br>國立臺灣大學<br>職業醫學與工業衛生研究所<br>88<br>The purpose of this study was to determine the bioavailability of ingested lead dust from a lead battery plant and changes in lead isotope composition in the blood. At the same time, this study tries to evaluate the possibility of distinguishing the lead exposure sources by examining isotope ratio changes. An animal experiment was performed with 5-6 weeks old male Sprague-Dawley rats. The rats of each experiment group were fed the mixture of AIN-76 semipurifed diet with various lead dusts from the assembly line of a lead battery plant. The targe

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Ferguson, Stephen Hutton. "Electromechanical properties of lead magnesium niobate-lead titanate and lead zirconium titanate ceramic actuators." Thesis, 2005. http://hdl.handle.net/1828/1875.

Texto completo

Resumen

Piezoelectric and electrostrictive actuators composed of lead titanate zirconate (PZT) and lead magnesium niobate-lead titanate (PMN-PT) are important in a variety of engineering applications. A review of the literature indicated that published phase diagrams for the PMN-PT system are based primarily on temperatures of dielectric transitions. rather than direct measurements of structural changes. Structural transformations in the PMN-PT ceramic system have not been investigated at non-ambient temperatures for compositions with less than 0.29 PT. The review also revealed that crack growth in cy

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Morrison-Ibrahim, Deborah E. "Lead Distribution in Urban Soils: Relationship Between Lead Sources and Children's Blood Lead Levels." Thesis, 2011. http://hdl.handle.net/1805/2598.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Chen, Li-Min, and 陳立敏. "The Study of Competitiveness of LED Lead Frame Industry." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/9953b3.

Texto completo

Resumen

碩士<br>國立臺北科技大學<br>管理學院工業工程與管理EMBA專班<br>102<br>Over the years, global warming has been identified as being the main significant cause for climate change, and the economic losses from severe weather are inestimable. Today, we are facing large challenges, not only from the energy crisis issues but also environmental protection as well. Therefore, environmental impact management and green energy are issues gaining extraordinary attention among companies throughout the world, and leading to a rapid growth of green industry development. Light Emitting Diote(LED) is one of the green products which ha

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Chueh, Miao-Ju, and 闕妙如. "A Study of the relationship between airborne lead and blood lead among lead-acid battery workers." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/16737211692761399395.

Texto completo

Resumen

碩士<br>國立臺灣大學<br>環境衛生研究所<br>91<br>Lead poison has been considered as one of the occupation hazard for lead-acid battery workers. The studies investigating the relationship between the lead dust concentration in the enviroment and the blood lead concentration of the workers have shown that other factors might play an important role in modulating the blood lead concentration in those workers. Those workers are then educated about how and why these identified factors may endanger to their health and follow-up studies are carried out as well. During the process, the workers with high blood lead

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Wang, Po-Yung, and 王博勇. "The Optimized Design of Transferred Material in LED Lead Frame." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/yyafhy.

Texto completo

Resumen

碩士<br>中華科技大學<br>經營管理研究所<br>103<br>The frame is the rack of the chips as well as the transportation medium for the inner electrics to the board. Taiwan suppliers of SMD LED frame share the world make about 18~21%. The usage of LED spread, LED supplier expanded the factory accordingly, the newer should face big challenge. Herewith the research for taking place of PPA plastic as the SMD LED reflector by Epoxy which is high temperature resistance & Good resistance to ultraviolet radiation intensity. It can increase the power from 0.5w to 0.7~2.0W. Compare with the low power LED frame in the market

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Hsia, Kuo Ching, and 郭青遐. "Comparison of the effects of blood lead and serum lead on health among occupational lead exposed workers." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/zkm27b.

Texto completo

Resumen

碩士<br>高雄醫學大學<br>職業安全衛生研究所<br>91<br>Although the whole blood lead measurement is currently used widely, about 99% of lead in blood is considered to be distributed in erythrocytes and which is a non-diffusible lead bound to the hemoglobin and the erythrocyte membrane. Only about 1% of lead in serum or plasma is considered to be diffusible and has greater bioavailability than lead in erythrocytes. Several investigators have proposed that plasma or serum Pb levels may better reflect the fraction of circulatory Pb that is more freely available for exchange with peripheral target tissues (e.g., brai

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!