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Mostrando ítems 711-720 de 1042
Influência de íons metálicos na estrutura de substâncias húmicas detectados por espectroscopia.
(Universidade Federal de São Carlos, 2005-03-23)
INFLUENCE OF METAL CATIONS IN THE STRUCTURE OF
HUMIC SUBSTANCES AS DETECTED BY SPECTROSCOPY, involves a
study by which starting from precursors of humic substances, some polymers
were obtained, characterized and comparable ...
Termodinâmica de líquidos iônicos via simulação computacional.
(Universidade Federal de São Carlos, 2006-10-04)
In this work classical molecular dynamics was used to study the
pure ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate,
[BMIM]+[BF4]-, and some solutions based in it. The OPLS-AA force field and
CHelpG derived ...
Metabólitos secundários de Streptomyces clavuligerus ATCC 27064 e fungos endofíticos filamentosos
(Universidade Federal de São Carlos, 2008-10-11)
This work describes the investigation of part of the secondary metabolism of actinomicete Streptomyces clavuligerus and endophytic filamentous fungus Penicillium sp isolated from Murraya paniculata; Penicillium brasilianum ...
Preparação e caracterização de blendas de PANI/ABS
(Universidade Federal de São Carlos, 2009-03-16)
Polyaniline (PANI) chemical synthesis was monitored in situ by means of electrochemical impedance, open circuit potential (Voc) and mass variation. We verify that the final properties of the polymer could be practically ...
Desenvolvimento de métodos para determinação de metilbrometo de homatropina em produtos farmacêuticos empregando turbidimetria em fluxo e titulação condutimétrica.
(Universidade Federal de São Carlos, 2004-07-23)
Antimuscarinic compounds are drugs, which play important role on the central nervous system. The most widely used are atropine, escopolamine, homatropine and homatropine methylbromide. These drugs are utilized in several ...
Estudo do processo de eletrodeposição e caracterização de ligas de Sn-Zn
(Universidade Federal de São Carlos, 2009-05-27)
This study evaluated the electrodeposition processes of Sn, Zn and Sn-Zn alloy in the absence and presence of tartaric acid as complexing agent. Initially all the systems studied were evaluated by Cyclic Voltammetry to ...
Influência do empacotamento cristalino nas conformações de N,N -bis(piridina-n-ilmetil) etanodiamidas e tioamidas análogas (n= 2, 3, 4)
(Universidade Federal de São Carlos, 2010-07-30)
The rational development of crystal structures requires consistent and directional formation of its synthons to control the supramolecular arrangement. Hydrogen bonds between atoms with high electronegativity (OH O and ...
Síntese assistida por microondas de LiMn2O4, caracterização e testes como catodo para dispositivos de armazenamento de energia
(Universidade Federal de São Carlos, 2011-03-02)
Lithium manganese oxide - LiMn2O4 - was produced by a microwaveassited solid state reaction. Solid mixtures containing LiOH.H2O and -MnO2 (synthesized electrolytically) underwent microwave irradiation for 3, 4 and ...
Estrutura e propriedade fotoluminescente do titanato de bário e cálcio obtido pelo método de polimerização de complexos (MPC)
(Universidade Federal de São Carlos, 2008-06-16)
The synthesis and characterization of Ba1-xCaxTiO3 (BCT) for x = 5; 10; 15; 20; 40 e 80 % mol that crystallizes in a perovisquita structure were studied in this work. The BCT material was synthesized by CPM which allows ...
Estudo químico de plantas com atividades sobre insetos sociais
(Universidade Federal de São Carlos, 2007-12-05)
The chemical control of pest, which uses conventional insecticides, shows a number of advantages to agriculturists due to its efficiency, lower cost and facility of use in related to others. However, the utilization of the ...