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Now showing items 151-160 of 482
Estudo teórico do espalhamento de elétrons por radicais livres
(Universidade Federal de São Carlos, 2007-07-13)
In this present work, we have carried out some calculations of electron-radicals scattering cross sections in the lowjintermediate energy range. Differential, integral, momentum transfer, total and total of absorption cross ...
Estudo químico e biológico de micro-organismos endofíticos associados às frutas banana, pêra e goiaba
(Universidade Federal de São Carlos, 2010-03-05)
Studies about interaction between microorganisms and plants are focused mainly in the vegetal tissues like roots, steam and leaves. Fruits are a right target for microorganism attacks. Nevertheless, endophytic microorganisms ...
Estudo da influência dos aditivos manitol, EDTA e NTA no processo de eletrodeposição de zinco sobre aço 1010 e na morfologia dos eletrodepósitos
(Universidade Federal de São Carlos, 2009-08-21)
In this paper the effects of adding mannitol, EDTA or NTA to an alkaline deposition bath on the electrodeposition of zinc on to AISI 1010 steel substrate were evaluated. Voltammetric curves of 1010 steel in deposition bath ...
Compósitos de Polipirrol e Li1,05Mn2O4 : preparação por dip coating ou casting e caracterização eletroquímica
(Universidade Federal de São Carlos, 2009-08-21)
Films of polypyrrole/Li1.05Mn2O4 composites were prepared by chemical synthesis over a carbon-fiber substrate, using the dipcoating and casting techniques, aiming at improving the performance of these materials as cathodes ...
Estudos biossintéticos de amidas bis-fenilpropanoídicas produzidas pelo fungo Penicillium brasilianum, um endofítico de Melia azedarach (Meliaceae)
(Universidade Federal de São Carlos, 2009-02-12)
In the present work it was developed analytical methodologies for investigation of biosynthesis of bis-phenylpropanoyl amides, using labeled precursors in the culture medium. The effect of different nitrogen sources on the ...
Construção e aplicação de um Turbidímetro / Nefelômetro Microcontrolado Portátil
(Universidade Federal de São Carlos, 2009-07-30)
Development of a portable, simple and inexpensive equipment with adequate sensitivity for turbidimetric and/or nephelometric sequential analyses practically simultaneous is the aim of this study. In fact, in-situ and on-line ...
Desenvolvimento de métodos eletroanalíticos para a determinação do diuron e ametrina e estudos de sorção em solos sob mata e cana-de-açúcar
(Universidade Federal de São Carlos, 2009-07-29)
It is vital to know the mechanisms and processes of interaction between pesticides and the environment and monitor the groundwater, surface water and soil in intensively used areas which such products for the evaluation ...
Estudo fitoquímico de Rauia sp e atividades sobre formigas cortadeiras e sobre a lagarta-do-cartucho do milho
(Universidade Federal de São Carlos, 2009-09-11)
The control of agriculture plague is relevant to Brazil that has large crop area. The control, by natural product, generally low toxic to humans and to animals and specific to target plague, is recommended. This work ...
A Reação de Diels - Alder de p-benzoquinonas sob efeito de microondas
(Universidade Federal de São Carlos, 2008-08-08)
In this work it was done a study of the microwave effect on Diels - Alder reaction of the p-benzoquinones thymoquinone (A1), 2,5-dimethyl-p-benzoquinone (A2) and 2,6-dimethyl-pbenzoquinone (A3) with the dienes cyclopentadiene ...
Estudo metodológico da reação de Prins em ausência de solventes orgânicos e sua aplicação na síntese de substâncias bioativas
(Universidade Federal de São Carlos, 2009-07-31)
In this work it was done a methodological study on Prins cyclization reaction in the absence of organic solvents. The synthesis of target compounds was possible by using or the catalytic system pTSA.SiO2(gel) initially ...