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| Luna,Christine Lamenha; Lopes,Carlos Edison; Massarani,Giulio. |
| The aim of this work was use flocculation/sedimentation and flotation for recovery of spores of the Bacillus sphaericus. Microorganism was produced batchwise using culture medium based skimmed milk, corn steep liquor and mineral salts. The best results of flocculation were obtained using CaCl2.2H2O, FeCl3.6H2O, Al2(SO4)3 and tannin as flocculating agents, with optimal flocculation concentrations of 1,500, 3,000, 2,000 and 1,700ppm, respectively. Flocculent suspensions were characterized based on floc diameter and density. Settling tests were performed in batch at different concentrations of the cellular suspensions and revealed high recovery of the solids in suspension in all cases. Flotation tests were accomplished using a mechanical agitated flotation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus sphaericus; Flocculation; Sedimentation; Flotation. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400008 |
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| Miranda,Rita de Cássia; Souza,Cynthia Silva de; Gomes,Edelvio de Barros; Lovaglio,Roberta Barros; Lopes,Carlos Edison; Sousa,Maria de Fátima Vieira de Queiroz. |
| The aim of this work was to investigate the potential of the diesel oil degrading yeasts to use them in bioremediation of areas contaminated by this pollutant. The cultures, identified as Rhodotorula aurantiaca UFPEDA 845 and Candida ernobii UFPEDA 862, were selected at the initial stage. In the course of the biodegradation assays, C. ernobii degraded tetradecane, 5 methyl-octane and octadecane completely and decane (60.8%) and nonane (21.4%) partially whilst R. aurantiaca presented degradation percentages of 93% for decane, 38.4% for nonane and 22.9% for dodecane. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodegradation; Yeasts; Diesel oil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100018 |
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| Queiroz Sousa,Maria de Fátima Vieira de; Lopes,Carlos Edison; Pereira Júnior,Nei. |
| A chemically defined medium consisting of D(+)fructose, L(-)threonine, K2HPO4, MgSO4.7H2O, ZnSO4.7H2O, CaCl2.2H2O, FeSO4.7H2O and deionized water, was developed to maximize the synthesis of actinomycin D by the Streptomyces parvulus DAUFPE 3124 strain. This medium resulted in the maximum antibiotic concentration of 133mg/L while using the original medium the production of actinomycin D was poor not surpassing 43mg/L. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinomycin D; Production; Streptomyces. parvulus; Synthetic medium. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000300002 |
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