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| NASCENTES, C. C.; KAMOGAWA, M. Y.; FERNANDES, K. F.; ARRUDA, M. A. Z.; NOGUEIRA, A. R. de A.; NÓBREGA, J.. |
| In this work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu, Mn, Pb, and Zn determination in beer without any sample digestion. The system was optimized and calibration was based on the analyte addition technique. A sample volume of 300 Al was introduced into the hot Ni tube at a flow-rate of 0.4 ml min1 using 0.14 ml -1 nitric acid solution or air as carrier. Different Brazilian beers were directly analyzed after ultrasonic degasification. Results were compared with those obtained by graphite furnace atomic absorption spectrometry (GFAAS). The detection limits obtained for Cu, Mn, Pb, and Zn in aqueous solution were 2.2, 18, 1.6, and 0.9 ug l-1, respectively. The relative standard deviations varied from 2.7% to... |
| Tipo: Separatas |
Palavras-chave: Determination; Spectrometry. |
| Ano: 2005 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/47179 |
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| CORDEIRO, I. B.; CASTRO, D. P.; NOGUEIRA, P. P. O.; ANGELO, P. C. S.; NOGUEIRA, P. A.; GONÇALVES, J. F. C.; PEREIRA, A. M. R. F.; GARCIA, J. S.; SOUZA, G. H. M. F.; ARRUDA, M. A. Z.; EBERLIN, M. N.; ASTOLFI-FILHO, S.; ANDRADE, E. V.; LÓPEZ-LOZANO, J. L.. |
| Chromobacterium violaceum is a Gram-negative proteobacteria found in water and soil; it is widely distributed in tropical and subtropical regions, such as the Amazon rainforest. We examined protein expression changes that occur in C. violaceum at different growth temperatures using electrophoresis and mass spectrometry. |
| Tipo: Separatas |
Palavras-chave: CIRCE; Chaperones; Differential gene expression.; Heat shock response.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/974472 |
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