Team:UFAM Brazil/Biosensor
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<p align="center"><img src="https://static.igem.org/mediawiki/2014/5/57/UFAM_BRAZIL_2014_biosen2.png" width="600"></p> | <p align="center"><img src="https://static.igem.org/mediawiki/2014/5/57/UFAM_BRAZIL_2014_biosen2.png" width="600"></p> | ||
+ | <a name="resultadoBiorsensor"></a> | ||
<h3 align="center">Experiments and Results</h3> | <h3 align="center">Experiments and Results</h3> | ||
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DH5α transformed with BBa_K1355002 was inoculated in LM (LB with low concentration of NaCl) liquid medium with chloramphenicol and grew until the Optical Density was 0.4 to 0.6abs (measured on spectrophotometer at 600 nm wavelength). After cell growth, an aliquot of 500μl in 5 eppendorf tubes (2ml) was taken and then added mercury chloride in order to achieve the concentrations of: 0.01 µg/ml, 0.02 µg/ml, 0.1 µg/ml, 0.2 µg/ml, and 1 µg/ml. The samples were incubated at 37°C on shaker. We collected each eppendorf tube at time 1 (01:30 hours of incubation), time 2 (03:00 hours of incubation) and time 3 (04:30 hours of incubation). Every sample was centrifuged at 12000g for 3 minutes and the pellet washed with TN Buffer (Nacl 0.15M + Tris HCl 10mM) and then re-suspended with 500μl of the same buffer. The same process was made to the bacterium without construction as a control to GFP expression/intensity. GFP expression was measured using the Hidex Chameleon spectrofluorimeter with excitation filter 340 nm and emission filter 500 nm wavelength. The Optical Density was measured simultaneously. All samples were analyzed in triplicate. | DH5α transformed with BBa_K1355002 was inoculated in LM (LB with low concentration of NaCl) liquid medium with chloramphenicol and grew until the Optical Density was 0.4 to 0.6abs (measured on spectrophotometer at 600 nm wavelength). After cell growth, an aliquot of 500μl in 5 eppendorf tubes (2ml) was taken and then added mercury chloride in order to achieve the concentrations of: 0.01 µg/ml, 0.02 µg/ml, 0.1 µg/ml, 0.2 µg/ml, and 1 µg/ml. The samples were incubated at 37°C on shaker. We collected each eppendorf tube at time 1 (01:30 hours of incubation), time 2 (03:00 hours of incubation) and time 3 (04:30 hours of incubation). Every sample was centrifuged at 12000g for 3 minutes and the pellet washed with TN Buffer (Nacl 0.15M + Tris HCl 10mM) and then re-suspended with 500μl of the same buffer. The same process was made to the bacterium without construction as a control to GFP expression/intensity. GFP expression was measured using the Hidex Chameleon spectrofluorimeter with excitation filter 340 nm and emission filter 500 nm wavelength. The Optical Density was measured simultaneously. All samples were analyzed in triplicate. | ||
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<p align="center"><img src="https://static.igem.org/mediawiki/2014/0/04/UFAM_BRAZIL_2014_biosen4.png" width="600"></p> | <p align="center"><img src="https://static.igem.org/mediawiki/2014/0/04/UFAM_BRAZIL_2014_biosen4.png" width="600"></p> | ||
<p align="center">Figure 2. GFP fluorescence intensity in the four given times, at mercury chloride concentrations of 0 µg/ml, 0.01 µg/ml, 0.02 µg/ml, 0.1 µg/ml, 0.2 µg/ml, and 1 µg/ml.</p> | <p align="center">Figure 2. GFP fluorescence intensity in the four given times, at mercury chloride concentrations of 0 µg/ml, 0.01 µg/ml, 0.02 µg/ml, 0.1 µg/ml, 0.2 µg/ml, and 1 µg/ml.</p> | ||
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+ | <h3 align="center">Reference</h3> | ||
+ | <p>Farias, L. A., Fávaro, D. I., Pessoa, A., Aguiar, J. P., & Yuyama, L. K. (2012). Mercury and methylmercury concentration assessment in children's hair from Manaus, Amazonas state, Brazil. Acta Amazonica, 42(2), 279-286.</p> | ||
+ | <p>Fillion, M., Philibert, A., Mertens, F., Lemire, M., Passos, C. J. S., Frenette, B., ... & Mergler, D. (2011). Neurotoxic sequelae of mercury exposure: an intervention and follow-up study in the Brazilian Amazon. Ecohealth, 8(2), 210-222.</p> | ||
+ | <p>Grotto, D., Valentini, J., Fillion, M., Passos, C. J. S., Garcia, S. C., Mergler, D., & Barbosa Jr, F. (2010). Mercury exposure and oxidative stress in communities of the Brazilian Amazon. Science of the Total Environment, 408(4), 806-811.</p> | ||
+ | <p>Hakkila, K., Maksimow, M., Karp, M., & Virta, M. (2002). Reporter Genes lucFF, luxCDABE, gfp, and dsred Have Different Characteristics in Whole-Cell Bacterial Sensors. Analytical biochemistry, 301(2), 235-242.</p> | ||
+ | <p>Kuncova, G., Pazlarova, J., Hlavata, A., Ripp, S., & Sayler, G. S. (2011). Bioluminescent bioreporters Pseudomonas putida TVA8 as a detector of water pollution. Operational conditions and selectivity of free cells sensor. Ecological Indicators, 11(3), 882-887.</p> | ||
</td></tr> | </td></tr> | ||
Latest revision as of 22:06, 17 October 2014