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Now showing items 11-20 of 44
Desenvolvimento de banhos alcalinos para eletrodeposição de Pb-Sn e Pb-Cu, na presença de aditivo orgânico. Caracterização do processo de eletrodeposição e dos filmes
(Universidade Federal de São Carlos, 2007-10-26)
Alkaline baths containing sorbitol, tartrate or EDTA were developed in this work for Pb-Sn and Pb-Cu electrodeposition on platinum substrate. The characterization of Pb-Sn and Pb-Cu plating baths by potentiometric titration ...
O uso da RMN na caracterização e quantificação de metabólitos produzidos por microorganismos com potencial biotecnológico
(Universidade Federal de São Carlos, 2007-06-29)
Nowadays, the microorganisms are responsible for the production of several antibiotics, immunosuppressant and antitumors, furthermore they are extremely important in industrial process. This work describes the production ...
Mecanismos reacionais e os processos de carga e descarga no caso de eletrodos planos de Pb em ácido sulfúrico e formação de eletrodos planos de PbO2 partindo de eletrodos de Pb
(Universidade Federal de São Carlos, 2007-10-04)
Two systems that form the basis of the lead-acid batteries were studied. The first system was the lead/sulfuric acid (Pb/H2SO4) interface. This interface is equivalent to negative electrode of lead acid batteries. The ...
Influência da ordem-desordem estrutural na fotoluminescência do CaTiO3:Sm
(Universidade Federal de São Carlos, 2007-03-08)
Some properties of the materials, such as ferroelectric and optic, are dependents to structural organization of the material. Thus, to know the order disorder degree at short,
intermediate and long range is important to ...
Caracterização eletroquímica de eletrodos de diamante dopado com boro em função de seu pré-tratamento
(Universidade Federal de São Carlos, 2007-10-26)
The effect of galvanostatic electrochemical pre-treatments
on the surface composition and wettability of boron-doped diamond (BDD) electrodes was characterized by X-ray photoelectron spectroscopy (XPS) analyses and contact ...
Utilização de métodos quimiométricos aliados a RMN na caracterização dos diferentes tipos de cafés comerciais
(Universidade Federal de São Carlos, 2007-03-02)
Coffee is an important product of Brazilian agribusiness. Nevertheless, the commercial evaluation of its quality is based upon subjective methods and this requires the methodologies development that provides information ...
Efeitos da dragagem sobre a qualidade de sedimentos contaminados do canal do porto de Santos : biodisponibilidade e toxicidade de metais e compostos orgânicos persistentes
(Universidade Federal de São Carlos, 2007-10-19)
Contaminated sediments is a worldwide problem, and mobilization of contaminants is one of the most critical issue in environmental risk assessment when dredging projects are concerned. Considering this, we decided to ...
Aspectos químicos envolvidos nas interações de Citrus com fitopatógenos
(Universidade Federal de São Carlos, 2007-08-10)
This present thesis describes the development of analytical methodologies involving the HPLC-PDA-MS/MS coupling to verify the production of both polar and non-polar metabolites in orange trees produced by grafting Citrus ...
Síntese e caracterização da céria dopada com gadolínio para uso em células combustíveis
(Universidade Federal de São Carlos, 2007-08-13)
The search for new materials for the development of catalysts, ultraviolet blockers, biomaterials and solid oxide fuel cell as alternative clean energy sources can be directly related to the use of cerium oxide or ceria ...
Eletrodos voltamétricos e amperométricos para a determinação de espécies de interesse farmacêutico
(Universidade Federal de São Carlos, 2007-03-30)
The development of modified electrodes by insoluble metal hexacyanoferrates have attracted wide spread attention due to their interesting chemical and electrochemical characteristics. In the first developed work, 20% (m/m) ...