Search
Now showing items 51-60 of 249
Estudos de propriedades termodinâmicas e estruturais dos líquidos etilenoglicol e glicerol utilizando simulação computacional.
(Universidade Federal de São Carlos, 2003-11-13)
Ethylene glycol and glycerol are molecular liquids with many
internal degrees of freedom. Rotations along specific chemical bonds allow the
formation of intramolecular hydrogen bonding, leading to several stable
conformational ...
Aplicação das técnicas espectroscópicas de RMN e IV e de métodos quimiométricos na quimiotaxonomia de liquens.
(Universidade Federal de São Carlos, 2007-02-02)
This present work
describes the chemotaxonomic analysis of lichens through the utilization of NMR
spectroscopic techniques, HR-MAS and NMR in solution, and IR allied with
chemometrics methods. This analysis were carried ...
Estudos de ionização de moléculas poliatômicas de interesse tecnológico.
(Universidade Federal de São Carlos, 2004-03-26)
Complex polyatomic compounds are increasingly being used for modern technological applications, e.g., those related to the semiconductor
industry, generation of new materials etc. However, there is a big lack of knowledge ...
Desenvolvimento de procedimentos em fluxo envolvendo espectrofotometria convencional e com longo caminho óptico para determinação de ânions em águas
(Universidade Federal de São Carlos, 2008-02-22)
In this work, five procedures were developed for determination of anions (chloride, sulphate, phosphate and fluoride), with spectrophotometric detection, being four employing a 100-cm optical length flow-cell and one of ...
Aplicação de técnicas espectrométricas, cromatográficas e quimiométricas na avaliação da autenticidade de plantas utilizadas como fitoterápicos.
(Universidade Federal de São Carlos, 2006-08-01)
The use of herbal medicines in the Brazilian market has increased in the last
few decades. Therefore, the quality control for herbal products, as well as traditional
medicines, is extremely important and for both: the ...
Síntese e caracterização de nanoilhas de PZT e BaTiO3
(Universidade Federal de São Carlos, 2007-09-27)
This work presents a systematic study of synthesis and characterization of ferroelectric nanoislands. Generally three methods were had been studied: polymerized complex method (MPC), hydrothermal synthesis and nonaqueous ...
Desenvolvimento de um fotômetro portátil usando LED como fotodetector e de procedimentos analíticos automáticos empregando multicomutação em fluxo
(Universidade Federal de São Carlos, 2008-07-16)
This work involves the development of portable photometer using a LED (Light Emitting Diode) as source of electromagnetic radiation and another one LED as photodetector. The viability of this proposal was demonstrated in ...
Fitoquímica de Raputia praetermissa (Rutaceae) e busca por candidatos a herbicidas inibidores da fotossíntese a partir de produtos naturais
(Universidade Federal de São Carlos, 2008-04-18)
The species R. praetermissa is native from Amazonia. Plant recently classified, it does not give biological and/or chemical in the literature. This fact has led to this study, which can lead to the correct chemosystematic ...
Estudo químico de Spiranthera odoratissima e atividades biológicas em formigueiros de Atta sexdens rubropilosa
(Universidade Federal de São Carlos, 2007-04-25)
This work describes the biossay-guided the phytochemical study of Spiranthera odoratissima (RUTACEAE), with test against the symbiotic fungus Leucoagaricus gongylophorus, leaf-cutting ant Atta sexdens rubropilosa and ...
Estudo de propriedades de filmes de óxidos anódicos crescidos em diferentes eletrólitos ácidos sobre o biomaterial Ti-50Zr at.%
(Universidade Federal de São Carlos, 2008-05-27)
Studies on the influence of the nature of the growth electrolyte on the properties of oxide films grown on the Ti-50Zr at.% alloy were carried out. The results obtained through the different measurements done (chronoamperometry, ...