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Avaliação do uso de laser-induced breakdown spectroscopy (LIBS) e wavelength dispersive x- ray fluorescence (WDXRF) na análise direta de couros naturais e sintéticos
(Universidade Federal de São Carlos, 2018-10-01)
The aim of this doctoral thesis was the development of analytical procedures for the qualitative and quantitative analysis of leather samples using LIBS and WDXRF techniques for direct analysis of solid samples. The first ...
Potencialidades das técnicas com fonte de plasma e da espectrometria de absorção atômica em forno de grafite de alta resolução com fonte contínua para análise de fertilizantes
(Universidade Federal de São Carlos, 2018-04-26)
Each year, Brazil sets records on agricultural productivity, which significantly increases the use of fertilizers in crops to provide the essential nutrientes. However, fertilizers can also be sources of toxic elements ...
Estudo da eletro-oxidação do paracetamol utilizando um reator eletroquímico em fluxo com eletrodo de diamante dopado com boro
(Universidade Federal de São Carlos, 2017-06-29)
This study was carried out with the aid of an experimental design, using a solution of paracetamol containing 100 mg L -1 of initial total organic carbon (TOC initial ) in 0.1 mol L -1 Na 2 SO 4 of ionic strength and a ...
Estudo químico e ecológico de Escovopsis spp., invasor do jardim de fungos de formigas cortadeiras
(Universidade Federal de São Carlos, 2018-05-02)
Microorganisms associated to leaf cutting ants comprise an important source of antifungal and antibacterial compounds due to the environment they are inserted in. The fungal garden is composed by a complex microbial network ...
Avaliação de diferentes estratégias de determinação de nutrientes e potenciais contaminantes em alimentos por técnicas baseadas em laser
(Universidade Federal de São Carlos, 2018-10-19)
The present project focuses on the development of strategies for the elemental determination of Ca, Cd, Cr, Cu, Fe, Mg, Pb and Zn in samples of orange juice and dietary supplements by Laser-Induced Breakdown Spectroscopy ...
Produção de haloalcaloides por fungos de ambiente terrestre
(Universidade Federal de São Carlos, 2016-09-02)
The production of secondary metabolites by microorganisms is a tool to find new substances with potential pharmacological activities of human interest. Thus, the search for more extreme environments or even exposure of ...
Complexos de metais de transição: aplicações no tratamento e diagnóstico da doença de Alzheimer
(Universidade Federal de São Carlos, 2014-11-26)
Currently there are about 35.6 million people diagnosed with Alzheimer's
disease (AD) in the world, and it is expected that this number will double by 2050.
Causes of Alzheimer's disease are not yet known, but their ...
Nitrogen and Phosphorus Nanocomposite Fertilizers: Synthesis, Particle Size and Matrix Effects
(Universidade Federal de São Carlos, 2018-02-26)
With high agricultural productivity, is necessary a chemical fertilization of soil, and nitrogen and phosphorus are the macronutrients indispensable for plants. In this sense, the current demand for fertilizer requires ...
Estudo de formação de tris-acetal internoe espiro-carbocíclicos a partir de (R)-(–)-e espiro-carbocíclicos a partir de (R)-(–)
(Universidade Federal de São Carlos, 2016-11-07)
In this work we studied, initially, the formation of the internal tris-ketals derivatives from their respective 2,2-bis-propargyl cyclic ketones from catalysis by gold complexes.
The reaction conditions were studied for ...
Diferenciação e caracterização química de espécies de Phyllanthus utilizando técnicas hifenadas
(Universidade Federal de São Carlos, 2016-01-15)
Several species of Phyllanthus genus are widely used in popular
medicine, even though very few phytochemical reports on species such as: P.
caroliniensis, P. stipulatus and P. tenellus are found in the literature. ...