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Influência de íons metálicos na estrutura de substâncias húmicas detectados por espectroscopia.
(Universidade Federal de São Carlos, 2005-03-23)
INFLUENCE OF METAL CATIONS IN THE STRUCTURE OF
HUMIC SUBSTANCES AS DETECTED BY SPECTROSCOPY, involves a
study by which starting from precursors of humic substances, some polymers
were obtained, characterized and comparable ...
Avalição química e da capacidade de biossorção da grama batatais (Paspalum notatum) visando aplicações analíticas.
(Universidade Federal de São Carlos, 2004-09-03)
This work suggests the chemical characterization of the genus Paspalum and was divided in 3 steps: 1) sample preparation of plants with diluted acids; 2) biosorption studies employing
Paspalum notatum root material, and ...
Estudo do mecanismo de oxidação do herbicida atrazina na presença de minerais e sustâncias húmicas em ambiente anaeróbio.
(Universidade Federal de São Carlos, 2005-12-14)
The oxidative decomposition of atrazine was induced by hydroxyl radicals generated from the interaction between hydrogen peroxide, H2O2, and iron oxides, yielding the
Fenton reaction. The reaction rate of atrazine oxidation ...
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 ...
Desenvolvimento de instrumentos e procedimentos analíticos automáticos com detecção quimiluminescente e espectrofotométrica.
(Universidade Federal de São Carlos, 2004-05-14)
In the present work is described computer-controlled flow systems
designed for process control of L-alanine synthesis and for bromide
determination in this amino acid, presented as a contaminant species. Since the
analytical ...
Emprego de estratégias quimiométricas para a diferenciação de alimentos de acordo com as formas de produção.
(Universidade Federal de São Carlos, 2006-11-14)
The application of pattern recognition techniques such as principal component analysis and cluster analysis was evaluated for classification of foods according to their production mode (industrial or homemade and organically ...
Desenvolvimento de procedimento automático para determinação fotométrica de N-ureídos totais em leguminosas empregando multicomutação em fluxo
(Universidade Federal de São Carlos, 2007-07-28)
This work aimend the development of an automated procedure for photometric determination of total ureide in soybean tissues using multicommutation in flow analysis. The photometric detection was based on the formation of ...
Desenvolvimento de procedimentos analíticos limpos para a determinação de cloreto e demanda química de oxigênio em águas.
(Universidade Federal de São Carlos, 2004-12-17)
The work here described deals with the development of clean analytical methods for
determination of chloride and chemical oxygen demand in water samples.
A flow injection spectrophotometric method was developed for
determining ...
Desenvolvimento de procedimentos automáticos para determinação de etanol, glicerol e ácido tartárico em vinho empregando multicomutação em fluxo.
(Universidade Federal de São Carlos, 2004-08-18)
In the present work, flow systems for the determination of ethanol, glycerol and
tartaric acid in wine without previous sample treatment are described. The flow
system were based on multicommutation and controlled by ...
Análise em fluxo e análise in situ como estratégias de melhoramento da seqüência analítica de amostras agronômicas.
(Universidade Federal de São Carlos, 2005-04-06)
The
present work discusses the use of alternative approaches for the improvement of the
agronomic sample analytical pathway. It was focused on the elimination of the
sampling step, with the in situ soil analysis, or in the ...