Thèses sur le sujet « Copper induatry and trade »
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Dercksen, Jan Gerrit. « The old Assyrian copper trade in Anatolia / ». Istanbul : Leiden : Nederlands historisch-archaeologisch instituut te Istanbul ; Nederlands instituut voor het nabije oosten, 1996. http://catalogue.bnf.fr/ark:/12148/cb37173725z.
Texte intégralShelnutt, John Paul. « Transition in the world primary copper industry, 1975-1990 ». Diss., The University of Arizona, 1991. http://catalog.hathitrust.org/api/volumes/oclc/41997845.html.
Texte intégralJones, Michael Rice. « Oxhide ingots, copper production, and the mediterranean trade in copper and other metals in the bronze age ». Texas A&M University, 2003. http://hdl.handle.net/1969.1/5957.
Texte intégralHsu, Yiu-Kang. « Dynamic flows of copper and copper alloys across the prehistoric Eurasian steppe from 2000 to 300 BCE ». Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:e6e7b95e-b852-4e38-8793-76d817149ce9.
Texte intégralCánepa, Guanilo Rodolfo Alejandro, et Memoli Adriana Revilla. « Impacto del volumen exportado del cobre en el comercio intrarregional y extrarregional del bloque regional Alianza del Pacífico entre los años 2013 y 2018 ». Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652728.
Texte intégralThe Pacific Alliance is a regional block founded in 2011 and formed by Chile, Colombia, Mexico and Peru. This agreement has been highly successful at the international level not only for its cooperation, but for knowing how to cope with its political and ideological differences. Its goal is to create an area of deep integration through the free movement of goods, services, capital and people, exonerating tariff barriers, as well as promoting growth, development and competitiveness. These same factors are the ones that have helped to improve its trading methods both intraregional and extraregional, being from the long list of beneficiary products Copper, a mineral commodity that has grown in exports, and whose main producing countries are in this agreement. The objective of this research is to carry out an analysis of the influence of the exported volume of copper on the intraregional and extraregional trade of the Pacific Alliance regional block. That is why a mixed investigation has been carried out, which is divided on one hand into the quantitative study, with data on the intraregional and extraregional trade of this block and the volume of copper exported, and on the other hand the qualitative research which includes interviews with experts on the subject, compiling their opinions and making a comparison among them. As a result of the data collected, it is concluded that the volume exported of this commodity do influence the intraregional trade, but not extraregional trade.
Tesis
Read, Robert. « The determinants of intra-firm trade in intermediate products : case studies of the synthetic fibre, copper and banana export industries ». Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284096.
Texte intégralQuezada, Reyes Víctor Alejandro. « Pretreatment to the leaching of copper sulphides minerals in oxidizing media ». Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/670663.
Texte intégralCopper production in Chile is developed by hydrometallurgical and concentration; copper concentrates are traditionally treated by the pyrometallurgical route. According to Cochilco, copper produced in 2019 by hydrometallurgical process represent a 27.3% of Chilean total copper production. However, this contribution is estimated to decrease to 11.6% by 2029, due to the depletion of copper oxides and the appearance of copper sulphides, mainly chalcopyrite, being this mineral refractory to conventional leaching conditions. An alternative to improve leaching efficiency is pretreatment prior to leaching, especially the effect of curing time. This variable can increases the kinetics of copper extraction, especially in sulphides ores, however, there is limited research about it. Studies on pretreatment evaluate the effect on leaching efficiency but not previous leaching. Furthermore, the reactions that govern this phenomenon have not been clearly identified. Therefore, the objective of this thesis is the evaluation of the effect of acid curing on the copper extraction from sulphides minerals in oxidizing media and in presence of chloride. A pure sample of chalcopyrite, chalcocite and a mine ore were used. Tests evaluating the effect of curing time, KNO3, NaCl and H2SO4 concentration have been carried out. The chalcopyrite sample effect was evaluated by ANOVA. The product generated in the pretreatment (agglomerates) has been characterized using different characterization techniques, such as: X-Ray diffraction, Scanning Electron Microscopy and Reflection Optical Microscopy. Furthermore, the effect of pretreatment has been evaluated on the leaching efficiency at different temperatures, leaching residues have also been characterized. In the pretreatment of the chalcopyrite sample and mine ore, under the conditions of 15 kg/t of H2SO4, 25 kg/t of NaCl and 15 days of curing time, the following products were identified: CuSO4, NaFe3(SO4)2(OH)6, Cu2Cl(OH) and S0. Regarding the chalcocite sample, under the conditions of with 30 kg/t of H2SO4, 40 kg/t of NaCl and 7 days of curing time, the following products were identified: Cu1.75S, Cu(OH)Cl, Na2SO4 and CuSO4. Finally, copper sulphides ore pretreatment improved leaching efficiency, between 4 and 6%, reaching a copper dissolution of 94% from chalcopyrite at 90 °C, strengthening the hydrometallurgy as an alternative treatment for copper sulphides ores.
Lattanzi, Gregory Denis. « THE VALUE OF RECIPROCITY : COPPER, EXCHANGE AND SOCIAL INTERACTION IN THE MIDDLE ATLANTIC REGION OF THE EASTERN WOODLANDS OF NORTH AMERICA ». Diss., Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/237820.
Texte intégralPh.D.
Native Americans in the Eastern Woodlands participated in extensive trade networks with their surrounding neighbors, beginning over 4,500 years ago. Lithics, perishable goods, exotics, and knowledge have crisscrossed the landscape throughout prehistory. By determining a general region from which copper artifacts originated and linking it with the location of their use and eventual discard, this research reveals "trade" patterns and thus advances our understanding of culture change in the Eastern Woodlands. This project focuses on evaluating the nature and extent of this interaction using copper artifacts from Early to Middle Woodland period sites within the Middle Atlantic region. These sites include Abbott Farm and Rosenkrans Ferry in New Jersey and Nassawango in Maryland. This study uses laser ablation multi-collector inductively coupled plasma-mass spectrometry to examine trace-element concentrations of copper in artifacts and thus tests existing regional models of prehistoric exchange. By examining the elemental composition of copper this study was able to determine whether the artifacts from these sites were made on raw material from single or multiple geological sources, and where those sources might be located. The elemental study showed that geologic sources of copper represented by the artifacts found on a site could have come from Pennsylvania, New Jersey, North Carolina and Canada. These geological sources are all located within the eastern United States. This helped to clarify how native peoples in the Middle Atlantic Region acquired copper and whether current reconstructions of ancient patterns of trade could account for the regional distribution of copper artifacts. A series of expectations based on interpretations of the chemical data were constructed to evaluate existing exchange models. Certain aspects of the exchange models did hold up in light of this study. A broad-based (down the line) exchange network was identified for the Early Woodland site examined in this study. Similarly, broad-based exchange networks were seen at Middle Woodland sites; with the addition of a more complex focused exchange network with copper coming from within the region. This means that prehistoric groups in this region, while they appear to exhibit signs of increased socio-cultural complexity, provide stronger evidence of a reciprocally shared ideology based on probable kin relations. Similarly, these results agree with previous copper sourcing studies carried out in the mid-continent. Identifying the provenance of artifacts used in exchange networks is important for understanding interactions among prehistoric groups and the impact of these networks on social organization. Furthermore, by combining geological, archaeological, and anthropological data this research elucidates processes of material resource acquisition and determines if they change through time. Research into the identification of raw material sources, the archaeological context of exotic artifacts, the movement of those artifacts between groups, and the significance or value attached to those artifacts through the act of exchange all contribute to an understanding of prehistoric behavioral and social processes.
Temple University--Theses
Sadagopan, Rishi S. « Effect of copper and nickel on the performance of an activated sludge system treating cellulose acetate wastewater ». Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09292009-020122/.
Texte intégralDelaney, Nathan. « Copper Capitalism : The Making of a Transatlantic Market in Metals, 1870-1930 ». Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1526067114476348.
Texte intégralEltz, Fabiana Zarpelon. « Filmes de PAH/PAA com nanopartículas metálicas para a desinfecção de efluentes industriais ». reponame:Repositório Institucional da UCS, 2017. https://repositorio.ucs.br/handle/11338/3603.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES
The supply and access to drinking water is one of the great challenges of this century. In this perspective, the rapid advancement of Nanotechnology has contributed significantly to the development and production of nanomaterials, aiming to improve the performance and efficiency of water decontamination processes. Thus, the main goal of this work was to prepare and characterize self-assembled thin films of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) containing silver nanoparticles (AgNPs) and copper (CuNPs) for their subsequent application in the tertiary treatment of industrial effluents for reuse. The AgNPs and CuNPs were synthesized by (i) reducing silver and copper (II) salts in aqueous medium, with subsequent incorporation in PAH/PAA thin films, and (ii) by direct irradiation of the PAH/PAA thin films with ultraviolet (UV) light after immersion in silver and copper (II) salt solutions. After self-assembling, the thin films were characterized by different instrumental techniques, including ultraviolet and visible (UV-Vis) molecular absorption spectroscopy, glow discharge optical emission spectroscopy (GD-OES), atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), inductively coupled argon plasma optical emission spectroscopy (ICP-OES) and transmission electron microscopy (TEM). In general, the UV-Vis and GD-OES spectra confirmed the incorporation/formation of AgNPs and CuNPs/copper (II) oxide in the thin films. The tests carried out with the industrial effluent showed that all the films developed presented bactericidal activity against total coliforms, ranging from 14 to 100% in terms of inhibition. The films containing AgNPs, by other hand, presented bactericidal activity 5% higher when compared to the films containing CuNPs. In addition, the films prepared from direct irradiation with UV light showed the highest inhibitory efficiency (greater than 90%) and, therefore, were evaluated as a function of the variation of the precursor salt concentration. In general, it was observed through the characterization by FESEM and TEM that the change in salt concentration promoted a variation in terms of size incorporated into the films (10-250 nm for AgNPs and 10-170 nm for CuNPs). The treatment of the industrial effluent for reuse with the films obtained by method (ii), in turn, reduced the total count of coliforms present in the raw industrial effluent (untreated) from 91 to 100%, being that the film obtained at the concentration 0.1098 mmol/L Ag+ was the most efficient material. Finally, considering the ease of application, the low environmental impact, and the satisfactory inhibitory action, the films developed in this work present a great potential to be used as auxiliaries in the tertiary treatment of industrial effluents.
Parsons, Elizabeth C. « Provoking the Rocks : A Study of Reality and Meaning on the Zambian Copperbelt ». Thesis, University of KwaZulu-Natal, Durban, 2007. http://hdl.handle.net/10413/61.
Texte intégralThesis (Ph.D.)-University of KwaZulu-Natal, 2007.
Nikis, Nicolas. « Archéologie des métallurgies anciennes du cuivre dans le bassin du Niari, République du Congo ». Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/276494.
Texte intégralDoctorat en Histoire, histoire de l'art et archéologie
info:eu-repo/semantics/nonPublished
Vartanesyan, Sosi Zepür. « The short run behavior of the price of copper financial markets and fundamentals / ». 1993. http://catalog.hathitrust.org/api/volumes/oclc/41978023.html.
Texte intégralMelicher, Milan. « Encapsulation and stabilisation of copper-chromium-arsenic (CCA) sludge from timber treatment plants ». Master's thesis, 1994. http://hdl.handle.net/1885/143957.
Texte intégralTang, Yun. « Sino-Japanese trade in the early Tokugawa period : kango, copper, and shinpai ». Thesis, 1995. http://hdl.handle.net/2429/3731.
Texte intégralMusonda, James. « Mine workers social recognition of the environmental costs of mining : a case study of Mopani copper mine and Kankoyo Township, Mufulira-Zambia ». Thesis, 2017. https://hdl.handle.net/10539/24474.
Texte intégralThis study investigates the environmental costs of copper mining in a mining Township of Kankoyo in Mufulira, Zambia. It investigates the ways in which the mine workers in this community experience, assess and respond to the pervasive environmental degradation caused by mining operations. The study indicates that the people of Kankoyo have an implied understanding (physical experiences e.g. smoke, dust etc.) of the risks in their environment but lack explicit knowledge (long term effects). Second, the working class are now in an awkward position between participating in activism against the company that pollutes their environment and the need to keep their jobs. Third, experiences with a polluted environment have divided the Kankoyo between those who engage in community mobilisation (the unemployed) and those who don’t because they want to protect their jobs (the mine workers). As experiences take a gender dimension, women tend to suffer more due to the gender roles they play. Fourth, given their helplessness, the people of Kankoyo now plead for social services not in social justice terms but as a compensation for the pollution suffered. The core conclusion is that workers understand environmental threats but: (a) they have little awareness of the long-term effects and (b) they tend to minimise them. For these workers their economic security i.e. employment, is primary and they prioritise the immediate over the longer term, thus (c) they have not responded to this issue in an organised way, rather their unions tend to focus on traditional workplace/pay issues. In addition, state and environmental organisations’ responses are inadequate. Consequently, the community is forced to accept the negative environmental impacts on their lives and the environment. Therefore, the study makes the following arguments: (a) Mineral resource led development in Zambia has failed. Instead, it has led to devastating environmental and health impacts on the nearby communities; (b) that the provision of social services and housing to the mine workers, and revenue to the government only served to divert attention from the long term and ongoing environmental degradation that has taken place overtime. The slug dams, the accumulated dust heaps, leach plants and long term environmental degradation on the copperbelt attest to this; (c) that the corporate policy on housing only served the interests of the mining companies by stabilising the workforce without regard for the arising health impacts; and; (d) privatisation has increased the vulnerability of the working class to environmental costs of mining. In the end, from the shattered hopes of a good life ‘modernisation’ emerges in the words of one respondent a ‘development’ of ‘environmental suffering’, as Kankoyo remains a ‘bomb waiting to explode’.
XL2018
Allende, Juan Agustin. « State enterprises and political environments Chile's National Copper Corporation / ». 1985. http://catalog.hathitrust.org/api/volumes/oclc/20555624.html.
Texte intégralBRESNEHAN, AMANDA. « FLEEING PREDATION : THE EFFECT OF COPPER EXPOSURE ON INDUCIBLE ANTIPREDATOR DEFENSES IN DAPHNIA PULICARIA CLONES FROM A HISTORICALLY METAL CONTAMINATED LAKE ». Thesis, 2012. http://hdl.handle.net/1974/7045.
Texte intégralThesis (Master, Biology) -- Queen's University, 2012-04-03 19:33:59.137
Holroyd, Ryan Edgecombe. « The English East India Company's Trade in the Western Pacific through Taiwan, 1670 – 1683 ». Master's thesis, 2011. http://hdl.handle.net/10048/1706.
Texte intégralHistory
Pleger, Thomas Cary. « Social complexity, trade, and subsistence during the Archaic/Woodland transition in the western Great Lakes (4000-400 B.C.) a diachronic study of copper using cultures at the Oconto and Riverside cemeteries / ». 1998. http://catalog.hathitrust.org/api/volumes/oclc/40235453.html.
Texte intégral