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Selection of microorganisms degrading S-Metolachlor herbicide BABT
Martins,Paula Fabiane; Martinez,Camila Ortiz; Carvalho,Giselle de; Carneiro,Paulo Irajara Borba; Azevedo,Ricardo Antunes; Pileggi,Sônia Alvim Veiga; Melo,Itamar Soares de; Pileggi,Marcos.
The aim of this work was to study herbicide degradation through selected microorganisms from humus and soil subjected to different plantation systems. The following bacterial species were identified: Klebsiella pneumoniae pneumoniae GC s.B strain 1, Pseudomonas alcaligenes, Enterobacter aerogenes GC s.A and Klebsiella pneumoniae pneumoniae GC s.B strain 2. Growth studies yet suggested the possibility of a very long lag phase. Although, culture with the herbicide presented biofilm formation and there were color changes in the herbicide that could have interfered with the espectrophotometry readings. After 5 days of incubation at 35ºC, the difference in the concentration of herbicide was 14.42% on average and after 10 days, 35.01%.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioremediation; Biodegradation; S-Metolachlor; Herbicide.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100019
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Oxidative processes during 'Golden' papaya fruit ripening Braz. J. Plant Physiol.
Resende,Evellyn Couto Oliveira; Martins,Paula Fabiane; Azevedo,Ricardo Antunes de; Jacomino,Angelo Pedro; Bron,Ilana Urbano.
'Golden' papayas at maturity stage 1 (15% yellow skin) were chosen to study selected oxidative processes, the activity of antioxidant enzymes and lipid peroxidation in storage at 22°C, during the ripening of the fruit. An increase in ethylene production was observed on the second day of storage and it was followed by an increase in respiration. An increased activity of catalase, glutathione reductase and ascorbate peroxidase was observed concurrently or soon after this increase in ethylene production and respiration. The increased activity of these enzymes near the peaks of ethylene production and respiration is related to the production of oxidants accompanying the onset of ripening. On the fourth day of storage, there was an increased lipid peroxidation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carica papaya; Antioxidant system; Climacteric; Ethylene; Lipid peroxidation.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000200002
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