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Now showing items 41-50 of 249
Síntese e caracterização a nível nanométrico da fase Li2(M) Ti308, M=Zn, Co e Ni pelo método Pechini.
(Universidade Federal de São Carlos, 2004-06-25)
The present work describes the preparation and characterization of the spinel phases Li2ZnTi3O8, Li2CoTi3O8 and Li2NiTi3O8 synthesized by the polymeric precursor method. Polycrystalline ceramic powders of high quality ...
Construção e aplicação analítica de eletrodos de pasta de carbono modificada com ftalocianina de cobalto para determinação de analítos de interesse.
(Universidade Federal de São Carlos, 2004-04-16)
In this thesis work the development and applications of cobalt
phthalocyanine carbon paste electrode (CoPc/CPE) for voltammetric determination
(cyclic voltammetry and differential pulse voltammetry) of hydrazine in boiler ...
Busca de substâncias bioativas em plantas amazônicas: Adiscanthus fusciflorus (Rutaceae), Trichilia pallida e T. rubra (Meliaceae)
(Universidade Federal de São Carlos, 2004-08-12)
The aim of this
work was the search for antiparasitic and insecticide compounds in active extracts
from the following amazon plants: A. fusciflorus (Rutaceae), T pallida e T. rubra
(Meliaceae). The selected biological ...
Avaliação de procedimentos para preparo de amostras agronômicas visando determinação multielementar por espectrometria de emissão ótica com plasma induzido.
(Universidade Federal de São Carlos, 2004-05-21)
Sample preparation was always considered a limiting factor for sample
throughput in the analytical sequence due to its high time consumption and great
probability for error insertion in the results. Therefore, purposes to ...
Estudo de procedimentos analíticos para determinação de Cr(III) e Cr(VI) em amostras sólidas.
(Universidade Federal de São Carlos, 2006-03-02)
The legislation is evolving towards the establishment of restrictions to the concentration of Cr(VI), the most toxic redox form of chromium, in solid materials. This aspect has stimulated the development of sample preparation ...
Busca de compostos inseticidas: estudo de espécies do gênero Trichilia (Meliaceae)
(Universidade Federal de São Carlos, 2006-05-15)
This work describes the results of the search for
insecticidal compounds from the Meliaceae family. The samples assayed against
fall armyworm Spodoptera frugiperda were the hexane, methanol and
hydromethanol extracts ...
Estudo e aplicações das técnicas de RMN HR-MAS e DOSY em plantas e extratos de plantas da ordem Rutales.
(Universidade Federal de São Carlos, 2004-06-23)
This work describes the implementation of two recent techniques in NMR - DOSY e HR-MAS
as a tool for the analysis of natural products mixture and in leaves of Citrus, respectively. The work begun with the technique DOSY, ...
O lúdico em Química : jogos e atividades aplicados ao ensino de Química
(Universidade Federal de São Carlos, 2004-04-01)
In this work games and ludic activities are applied to chemistry teaching. In the introduction, the constructivism aspects of the theories of cognitive development are presented. Then, the ideas and theories of both ludic ...
Desenvolver a cidadania através da química : é possível? Um desafio a ser vencido
(Universidade Federal de São Carlos, 2003-12-17)
The present work was inspired by the High School National
Curriculum Parameters (PCNEM) as well the Schnetzler proposal of teaching
chemistry to citizenship. It is also based on the observed chemistry teaching
problems, ...
Nitrosilo complexos de rutênio com ligantes bifosfínicos: espectroscopia, eletroquímica, estudo da reatividade e liberação de NO.
(Universidade Federal de São Carlos, 2005-12-09)
In this thesis some series of ruthenium nitrosyl complexes presenting as common characteristic the presence of diphosphines ligands in their structures, among them: dppm,
dppe, c-dppen, dppp, dppb, dcpe and dppf were ...