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Mostrando ítems 11-20 de 91
Atividade inseticida de espécies de trichilia frente à lagarta-do-cartucho do milho spodoptera frugiperda
(Universidade Federal de São Carlos, 2008-07-18)
This work presents the phytochemical study and biological assays carried out with organic extracts of fruits and seeds
from Trichilia claussenii, T. elegans and inflorescence from T. catigua against S. frugiperda. Among ...
Titulações potenciométricas de cátions metálicos tendo como eletrodo indicador o sistema Cu/CuY2-
(Universidade Federal de São Carlos, 2007-07-27)
In this work a Cu/CuY2- indicator system was used to carry out potentiometric titrations of Cu2+, Co2+, Cd2+, Zn2+ and Mn2+ ions with EDTA solution. A copper wire with 8.32 cm2 of superficial area was used as an indicator ...
Fracionamento de zinco em amostras de leite
(Universidade Federal de São Carlos, 2009-02-26)
This work studies were aimed at samples preparation and chemical speciation levels zinc in samples of different kind
of milk (milk cattle, sheep, goat, and soybean milk base). The proposal aimed to establish the differences ...
Análises de meroterpenos produzidos por Penicillium brasilianum
(Universidade Federal de São Carlos, 2008-02-14)
This work describes the use of the high performance liquid cromatography (HPLC) technic coupled to the mass spectrometry technique for the analysis of fungal extracts, and the main purpose was the detection of meroterpens ...
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 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 ...