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| Kumari,Annapurna; Mahapatra,Paramita; Banerjee,Rintu. |
| Optimization of lipase production by Enterobacter aerogenes was carried out using response surface methodology (RSM) where the statistical model was obtained by fractional factorial central composite design. The influence of various physico-chemical parameters, viz. temperature, oil concentration, inoculum volume, pH and incubation period on lipase production was examined. Optimization of physico-chemical parameters resulted 1.4- fold increase in lipase activity. The optimum levels of parameters were 34°C, oil concentration 3%, inoculum volume 7%, pH 7 and incubation time 60 h for obtaining a maximum lipase activity of 27.25 U/ml. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Central composite design; Enterobacter aerogenes; Lipase; Optimization; Parameter; Response Surface Methodology. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600005 |
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| Valero,Nelson; Gómez,Liliana; Pantoja,Manuel; Ramírez,Ramiro. |
| In this paper, the production of humic substances (HS) through the bacterial solubilization of low rank coal (LRC) was evaluated. The evaluation was carried out by 19 bacterial strains isolated in microenvironments with high contents of coal wastes. The biotransformed LRC and the HS produced were quantified in vitro in a liquid growth medium. The humic acids (HA) obtained from the most active bacterial strain were characterized via elemental composition (C, H, N, O), IR analyses, and the E4/E6 ratio; they were then compared with the HA extracted chemically using NaOH. There was LRC biotransformation ranged from 25 to 37%, and HS production ranged from 127 to 3100 mg.L-1. More activity was detected in the isolated strains of Bacillus mycoides,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Low rank coal; Microbacterium sp; Bacillus mycoides; Acinetobacter baumannii; Enterobacter aerogenes. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300021 |
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| Azevedo,Paola Aparecida Alves; Furlan,João Pedro Rueda; Oliveira-Silva,Mariana; Nakamura-Silva,Rafael; Gomes,Carolina Nogueira; Costa,Karen Regina Carim; Stehling,Eliana Guedes; Pitondo-Silva,André. |
| ABSTRACT Enterobacter cloacae and E. aerogenes have been increasingly reported as important opportunistic pathogens. In this study, a high prevalence of multi-drug resistant isolates from Brazil, harboring several β-lactamase encoding genes was found. Several virulence genes were observed in E. aerogenes, contrasting with the E. cloacae isolates which presented none. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Enterobacter cloacae; Enterobacter aerogenes; Virulence; Resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500224 |
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| Maia,Sandra Ribeiro; Ferreira,Ana Cristina; Abreu,Luiz Ronaldo de. |
| Considerando o envolvimento de queijos como veículo de microrganismos patogênicos, foi avaliada a eficiência do extrato alcoólico de cúrcuma adicionado à ricota, na redução de Escherichia coli e Enterobacter aerogenes. Foram fabricados três lotes de ricota cremosa e inoculados com 104 UFC/mL de Escherichia coli (ATCC 25922) e 105 UFC/mL de Enterobacter aerogenes (ATCC 13048). Às ricotas, foram adicionados 0,4% de NaCl e extrato alcoólico de Curcuma longa L., em concentrações que variaram de 0,0% a 2,0%. As ricotas foram avaliadas físico-química e microbiologicamente em 0, 1, 7, 14 e 21 dias de armazenamento refrigerado. O percentual de umidade das ricotas foi, em média, de 73%. O pH médio observado foi de 5,4 e o percentual de gordura de 3%. Pelos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Curcuma longa; Escherichia coli; Enterobacter aerogenes; Ricota. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542004000200016 |
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| ZOU,Yu; HOU,Xiyan. |
| Abstract Growth of Enterobacter aerogenes and accumulation of histamine in chub mackerel (Scomber japonicus) were investigated through measuring bacterial count, histidine decarboxylase (HDC) activity and histamine content in fish samples stored at various temperatures from 4 to 37 °C. Results showed that bacterial count and HDC activity rapidly increased in chub mackerel inoculated with E. aerogenes at storage temperature above 20 °C and reached the highest values (8.64 log CFU/g and 31.68 U/g) at 37 °C. Meanwhile, fish samples stored at 25 and 37 °C for 18 h, formed histamine at above 50 mg/100 g of the potential hazard level. In contrast, bacterial growth and histamine formation were controlled for 36 h by cold storage at low temperature (4 °C).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Histamine; Histidine decarboxylase; Enterobacter aerogenes; Chub mackerel. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100076 |
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