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Mostrando ítems 31-40 de 221
Avaliação de estratégias analíticas para reduzir interferências em ICP-MS e ICP OES
(Universidade Federal de São Carlos, 2011-08-05)
Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) are widely multi-element techniques used to analysis complex samples. Otherwise some aspects, ...
Desenvolvimento de materiais para a detecção e degradação do bisfenol A e seus intermediários de reação
(Universidade Federal de São Carlos, 2016-09-29)
In this study, tungsten oxide and copper composites were
developed for making applied anodes in fotoelectrolysis of bisphenol A (BPA)
and electrochemical sensors composed of carbon nanotubes (CNTs) and metal
nanoparticles ...
Síntese assistida por micro-ondas e caracterização de óxidos de manganês para aplicação em dispositivos de armazenamento de energia
(Universidade Federal de São Carlos, 2015-12-15)
The oxides Mn3O4, LiMn2O4and their doped derivatives, LiMnij98Gaojo2O3j98Sojo2, LiMni,9oGao,ioO3,9oSo,io, LiMni,98Alo,o2O3,98So,o2 and LiMni,9oAlo,ioO3,9oSo,io were produced by means of an alternative route: the ...
Especiação de metais e sua interação com a matéria orgânica dissolvida em um reservatório artificial
(Universidade Federal de São Carlos, 2010-05-28)
Environmental degradation of aquatic ecosystems stimulates investigations about the interactions between dissolved organic matter, trace metals and the biota. This study aimed to investigate the speciation of cadmium, ...
Titanatos de alcalinos terrosos : a ordem associada à desordem
(Universidade Federal de São Carlos, 2010-02-26)
The microwave-assisted hydrothermal method was implemented in the synthesis of alkaline earth titanates under ABO3 stoichiometric known as perovskites, being efficient and innovative. For that, OH- groups played an important ...
Avaliação e caracterização da borracha natural de diferentes clones de seringueira cultivados nos estados de Mato Grosso e Bahia
(Universidade Federal de São Carlos, 2010-03-02)
Natural rubber (NR) is a basic raw material used in the manufacture of a wide range of rubber goods. Usually both quality and productivity levels of Brazilian NR are lower than the imported NR. This is due to a lack of ...
Estudo da interação de íons cobre e cromo com eletrodos de pasta de carbono modificada e polianilina em meio aquoso por técnica de voltametria de pulso diferencial
(Universidade Federal de São Carlos, 2010-05-11)
The electrochemical sensors to measure metallic ions in water and waste water are among the most important areas of research nowadays. The environmental control and monitoring chalenges that stimulated the aim of this work ...
Estudo de casos na promoção da argumentação sobre questões sócio-científicas no ensino superior de química
(Universidade Federal de São Carlos, 2010-03-15)
This study was guided mainly in the application of the case study method of instruction. We analyzed the students‟ argumentation on socio-scientific issues in an undergraduate chemistry course in Brazil. Firstly, we ...
Estratégias analíticas para a avaliação química de solos e liquens da Antártica marítima
(Universidade Federal de São Carlos, 2011-08-12)
The aim of this PhD thesis is the ample study of soil and lichen samples from Antarctica, collected in regions under strong anthropogenic impact. Surface soil samples were collected around several scientific stations: ...
Desenvolvimento de eletrodos modificados com polímeros condutores e nanotubos de carbono e aplicação na determinação de analitos de interesse farmacêutico em amostras biológicas e em fármacos
(Universidade Federal de São Carlos, 2011-07-15)
In this work is reported the studies carried out modified electrodes with poly(1-aminoanthracene) (PAA) and poly(1-aminoanthraquinone) (PAAQ), and composite films from a mixture of polymers with carbon nanotubes (CNTs). ...