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A suitable procedure to choose antimicrobials as controlling agents in fermentations performed by bacteria 58
Oliveira,Romulo C.; Gomez,José G.C.; Torres,Bayardo B.; Bueno Netto,Celso L.; Silva,Luiziana F. da.
This work evaluated the influence of nitrofurantoin, erythromycin and streptomycin at 50, 25 and 12,5% of the minimal inhibitory concentration (MIC) on maximum specific growth rate (µmax) and specific polymer accumulation rate (µPHB) of Alcaligenes eutrophus, considered resistant to those antimicrobials. Nitrofurantoin strongly affected µmax even at 50% MIC. Streptomycin moderately affected µmax only at 50%MIC. Nitrofurantoin showed the most harmful effect on µPHB when 50% MIC was applied and erythromycin was not harmful.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Antimicrobial susceptibility; MIC; PHB; Alcaligenes eutrophus; Ralstonia eutropha.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000200004
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Nutrient optimization for production of polyhydroxybutyrate from halotolerant photosynthetic bacteria cultivated under aerobic-dark condition 69
Sangkharak,Kanokphorn; Prasertsan,Poonsuk.
Three halotolerant bacterial strains; Rhodobacter sphaeroides ES16 (the wild type) and the two mutant strains of R. sphaeroides ES16, namely N20 and U7, were cultivated in glutamate-malate (GM) medium and screened for production of polyhydroxybutyrate (PHB). The mutant strains N20 and U7 were found to accumulate PHB (53.9 and 42.0% of DCW, respectively) 3.6 and 2.8 times higher than the wild type strain (19.5% of DCW), respectively. R. sphaeroides N20 were selected for studies on the effects of nutrient and environmental conditions on PHB accumulation. The optimal condition was 4 g/l acetate, 0.02 g/l (NH4)2SO4, C/N ratio of 6:1, 1.0 g/l K2HPO4, 1.0 g/l KH2PO4 and 3% NaCl with initial pH at 7.0. Under this optimal condition, the maximum PHB accumulation...
Tipo: Journal article Palavras-chave: Aerobic-dark cultivation; Optimization; PHB; Polyhydroxybutyrate; Rhodobacter sphaeroides.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300009
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