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Now showing items 141-150 of 652
Investigação da corrosão do aço carbono AISI 1020 em soluções de NaCl utilizando microscopia óptica in situ
(Universidade Federal de São Carlos, 2016-09-23)
According to recent information from the World Corrosion Organization, annually, approximately 2.2 trillion of global GDP is spent on corrosion-related damage. These expenses are almost the GDP of the seventh world economy ...
Síntese e caracterização de nanotubos de TiO2 preparados eletroquimicamente
(Universidade Federal de São Carlos, 2016-04-20)
In the field of nanotechnology, the titanium dioxide (TiO2) has been widely studied for its optical and electrical properties. This oxide is an n-Type semiconductor and is found naturally in
different crystalline phases. ...
Estudo da variação de pH interfacial durante a reação de desprendimento de hidrogênio por simulação de elementos finitos
(Universidade Federal de São Carlos, 2012-02-27)
Different papers propose a interfacial pH variation during an electrochemical reaction. Among them, as example, can be cited the electrodeposition of Zn and Co as well as the steel corrosion in aqueous sulphide solutions. ...
Desenvolvimento de métodos analíticos utilizando laser-induced breakdown spectroscopy (LIBS) para determinação de contaminantes, macro e micronutrientes em fertilizantes
(Universidade Federal de São Carlos, 2017-02-22)
In this study analytical procedures were developed using laser-induced breakdown spectroscopy (LIBS) for determination of B, Ca, Cd, Cr, Cu, K, Mg, Mn, Na, Pb, and Zn in solid fertilizers and suspensions. Factorial designs ...
Transições entre estados espaciais não homogêneos em sistemas químicos e biológicos
(Universidade Federal de São Carlos, 2019-07-22)
In the article The Chemical Basis of Morphogenesis - 1952, Alan M. Turing proposed that the morphogenesis could be described through a specific reaction mechanism which enables the emergence of inhomogeneous and stationary ...
Ferramentas quimiométricas aplicadas na avaliação de estratégias que visam a remoção de íons fluoreto em efluente de drenagem ácida de mina
(Universidade Federal de São Carlos, 2017-05-19)
The goal of this study is to provide improvements in the treatment of effluents from acid rock drainage (ARD) of the Mineral Treatment Unit (Caldas / MG) of the Nuclear Industries of Brazil (INB). Due to the presence of ...
Uso da técnica laser-induced breakdown spectroscopy (LIBS) para análise direta de ligas metálicas: estratégias de normalização, calibração univariada e multivariada e modelos de classificação
(Universidade Federal de São Carlos, 2017-02-10)
This academic master's dissertation was devoted to the development of analytical methods for the determination of Al, Cr, Cu, Fe, Mn, Mo, Ni, Ti, V and Zn in alloys and steels. The main purpose of the study was to present ...
Desenvolvimento e caracterização de sensores eletroquímicos modificados com meso-tetra-(2-tienil)- porfirinato de cobre (II) para a determinação de dopamina em amostras biológicas sintéticas
(Universidade Federal de São Carlos, 2016-02-26)
In this work, was built gold (Au) and glassy carbon (GC) electrochemical sensors modified with cooper (II) meso-tetra-(2-thienyl)-porphyrinate ([Cu(II)TThP]) and the GC modified electrode was applied for dopamine determination. ...
Microfabricação de guias ópticos em vidros óxidos de metais pesados contendo terras-raras
(Universidade Federal de São Carlos, 2016-03-23)
In this study, we present the production and characterization of a novel binary glass
system: (100-x)SbPO4-xGeO2 where x = 30, 40, 50, 60, 70, 80 and 90 mol %. The
dependence of GeO2 content on thermal, structural and ...
Contaminantes emergentes em estações de tratamento de esgoto aeróbia e anaeróbia
(Universidade Federal de São Carlos, 2016-11-21)
The wastewater treatment plant (WWTPs) play an important role to ensuring the health and preservation of aquatic ecosystems through biological removal (mainly) of pollutants and microorganisms in the sanitary and industrial ...