Encontrados 5 documentos, a visualizar página 1 de 1
Interferência do excesso de água no solo e componentes de produção em beterraba
Costa,Raimundo Nonato T; Vasconcelos,José Paulino de; Silva,Luís Antônio da; Ness,Ricardo Luiz LO experimento, realizado no Laboratório de Hidráulica e Irrigação da UFC, em Fortaleza, de julho a setembro de 2002, utilizou tanques de drenagem de nível freático constante para verificar a relação existente entre o Índice Diário de Estresse (IDS) e componentes de produção em beterraba, cultivar Early Wonder. O delineamento experimental foi inteiramente casualizado, com cinco tratamentos (0; 120; 180; 240 e 30...
Pollination efficiency of the stingless bee Melipona subnitida on greenhouse sw...
Cruz,Darci de Oliveira; Freitas,Breno Magalhães; Silva,Luis Antônio da; Silva,Eva Mônica Sarmento da; Bomfim,Isac Gabriel AbrahãoThe present study was carried out in Northeastern Region of Brazil, in order to investigate the use of stingless bee Melipona subnitida Ducke in the pollination of greenhouse sweet pepper (Capsicum annuum L.). Treatments of hand cross-pollination, hand self-pollination, pollination by bees and restricted pollination were performed. Results showed that despite sweet pepper flowers are considered autogamous, this...
Detection of the damage caused to DNA by a thiophene-S-oxide using an electroch...
Brett, Ana Maria Oliveira; Silva, Luis Antônio da; Fujii, Hideki; Mataka, Shuntaro; Thiemann, ThiesThe electrochemistry of 3,4-dibenzyl-2,5-dimethylthiophene-S-oxide was investigated as well as its interaction with dsDNA. The electrochemical study of the thiophene-S-oxide was performed at different pH values, in a mixed solvent and by solid state voltammetry, and showed that the molecule is reduced at a very negative potential, and the reduction is pH dependent. A glassy carbon electrode modified with a thic...
Adsorption of Guanine, Guanosine, and Adenine at Electrodes Studied by Differen...
Oliveira-Brett, Ana Maria; Silva, Luís Antônio da; Brett, Christopher M. A.Guanine, guanosine, and adenine have been electrochemically oxidized at a glassy carbon electrode in aqueous solution. Electrochemical impedance is shown to be a valuable probe of adsorption of the oxidation products on the electrode surface. Voltammetric and impedance studies at different concentrations have been carried out. Correlation between the results for the different compounds helps in understanding th...
Análise por difração de raios x de filmes de óxidos cerâmicos compostos por IrO...
Alves,Valéria Almeida; Silva,Luís Antônio da; Boodts,Julien Françoise ColetaIndependent of the sample form (powder or film), XRD analysis of Ir0,3Ti(0,7-x)Ce xO2, (nominal) mixtures, for x=0, shows the formation of a solid solution phase between IrO2 and TiO2, as well as the rutile phases of IrO2 and TiO2. The presence of the anatase phase of TiO2 is also confirmed. The introduction of 30 mol% CeO2 in the mixture reveals the presence of the CeO2 and Ce2O3 phases, besides the already me...
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