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Now showing items 581-590 of 652
Estudo fitoquímico de Annona sylvatica (Annonaceae). Avaliação das atividades inseticida e fungicida frente às formigas cortadeiras e seu fungo simbionte e ao gorgulho do milho
(Universidade Federal de São Carlos, 2013-03-27)
The leaf-cutting ants are social species, living in permanent colonies. The genera of the greater importance, Atta (saúvas) and Acromyrmex (quenquéns), are the major plagues of Brazilian agriculture, to cause serious damages ...
Avaliação da espectroscopia Raman intensificada por superfície em papel filtro e métodos quimiométricos na quantificação de fármacos
(Universidade Federal de São Carlos, 2014-02-21)
Raman spectroscopy has been widely used for pharmaceutical analysis in recent decades due to advances of this technique, related to the development of electronics, optics and fundamental studies. As a consequence to the ...
Efeito de diferentes solventes nas propriedades fotoluminescentes do CaMoO4
(Universidade Federal de São Carlos, 2013-08-02)
The CaMoO4 has been extensively studied due to its luminescent emissions in the visible region of the electromagnetic spectrum at room temperature, presenting potential for technological applications including lasers, light ...
Nanotecnologia verde em uma perspectiva CTSA: análise de uma proposta didática WebQuest para a alfabetização científica na educação básica
(Universidade Federal de São Carlos, 2014-09-15)
The objective of this work was to evaluate the teaching resource WebQuest and the topic of green nanotechnology in order to promote scientific and technological literacy in basic education. Specifically, we tried to identify ...
Desenvolvimento e estudo da estabilidade de nanoemulsões do tipo óleo em água com óleos vegetais
(Universidade Federal de São Carlos, 2011-10-11)
A low energy emulsification method was used to prepare o/w emulsions of sweet almond or Brazil nut oils stabilized by Tween 80 and Span 80. Stable nano emulsions with droplet size of 160 nm and 270 nm were obtained for ...
Investigação do potencial antimicrobiano de plantas do cerrado no controle de micro-organismos simbiótico da Diabrotica speciosa
(Universidade Federal de São Carlos, 2014-03-28)
In the cerrado biome it is estimated approximately 160.000 species of plants, animals and fungi that, through their history have been exposed to complex interactions. Those interactions have created a complex system of ...
Terpenóides e seu metabolismo em fungos: um estudo de Scleroderma sp. e Xylaria sp.
(Universidade Federal de São Carlos, 2011-08-05)
In the present work, the lanostane triterpenes Lanosta-8,24-diene-3β,23-diol and Lanosta-8,23-diene-3β,25-diol were isolated from the basidiomycete Scleroderma sp., an extremely rich source of triterpenes and not ...
Influência da presença de líquidos iônicos no comportamento térmico, termo-mecânico e nas propriedades de transporte em membranas de policarbonato obtidas via casting
(Universidade Federal de São Carlos, 2014-02-25)
New alternatives to the use of polymeric membranes as solid electrolyte in fuel cells have been considered , in order to find solutions to recurrent obstacles that limit the performance of these cells, the dependence of ...
Preparo e caracterização de material de referência de solo para nutrientes e contaminantes inorgânicos
(Universidade Federal de São Carlos, 2014-09-26)
The certified reference materials make an important role in the establishment of traceability in analytical chemistry, ensuring reliability and accuracy to the measurements and are fundamental for the validation of analytical ...
Desenvolvimento de metodologia analítica para a determinação de arsênio em fertilizantes minerais
(Universidade Federal de São Carlos, 2014-02-20)
Analytical method for the determination of As in samples of minerals fertilizers by Hydride Generation Flame Atomic Absorption Spectroscopy (HG AAS) was developed. First of all a study to check the effect of the concomitants ...