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Uso de técnicas espectroanalíticas na avaliação de amostras de placas de circuito impresso de lixo eletrônico
(Universidade Federal de São Carlos, 2015-11-26)
The increase in the consumer electronics equipment, especially, the cell has aroused the academia and society in general interest. Such equipment when obsolete became part of the so-called junk mail. Among the components ...
Desenvolvimento de modelos de calibração multivariada em espectroscopia de infravermelho próximo para ácidos graxos em amostras de carne bovina
(Universidade Federal de São Carlos, 2016-03-21)
The Brazilian cattle have shown promise prominence in the international market
compared to other commodities. It already knows the important role of fatty acids in the complimentarily of human nutrition. On the other hand, ...
Estratégias quimiométricas para análise de plantas por espectrometria de emissão óptica com plasma induzido por laser
(Universidade Federal de São Carlos, 2010-12-08)
A simultaneous optimization strategy based on neuro-genetic approach is proposed for selection of operational parameters for the simultaneous determination of macronutrients (Ca, Mg and P), micronutrients (B, Cu, Fe, Mn ...
Teores dos elementos químicos essenciais e tóxicos na rastreabilidade da carne bovina
(Universidade Federal de São Carlos, 2012-02-15)
The objective of this work was to develop methodologies for the determination of inorganic constituents in meat sample and the study of correlations between samples with chemical elements profile, especially Nelore samples ...
Avaliação da espectrometria de emissão óptica com plasma induzido por laser (LIBS) para a determinação de Ba, Cd, Cr e Pb em brinquedos
(Universidade Federal de São Carlos, 2010-11-17)
LIBS is a spectroanalytical technique that employs the microsampling by laser ablation and subsequent exitations for atoms, ions and molecular fragments presents in induced microplasm.This technique was evaluated for ...
Aplicação de imagens digitais e técnicas espectroanalíticas combinadas com quimiometria para detecção e quantificação de adulteração em leite bovino
(Universidade Federal de São Carlos, 2013-02-22)
Milk provides essential nutrients (carbohydrate, fat, protein, minerals and vitamins) of great nutritional relevance for humans, particularly during childhood. Nowadays, the occurrence of milk adulteration is a major issue ...
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 ...
Espectroscopia Raman amplificada por superfície associada à cromatografia em camada delgada para análise de amostras alimentícias
(Universidade Federal de São Carlos, 2018-04-13)
Surface enhancement Raman spectroscopy (SERS) presents the advantages of conventional Raman spectroscopy with the possibility to detect compounds in low levels due to the enhancement on Raman intensity, generated by the ...
Diferenciação química de quatro espécies de Bauhinia (pata-de-vaca)
(Universidade Federal de São Carlos, 2018-06-15)
The search for new compounds from natural products with high biological activity is an arduous task that has improved due to the evolution of instrumental analytical techniques. In addition, the use of medicinal herbs for ...
Emprego de imagens hiperspectrais e espectrometria de emissão em plasma introduzido por laser na análise direta de amostras de lixo eletrônico
(Universidade Federal de São Carlos, 2015-02-27)
In this study, laser induced breakdown spectroscopy was combined with chemometric
tools to study the chemical composition of WEEE discarded. For this, three
samples of printed circuit board were chosen for analysis: PCBs ...