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Revision as of 10:22, 16 October 2018

Bioremediation of Sour Crude Oil Waste using Cyanobacteria




InterLab

Every year, the Measurement Committee tries to analyze the causes of difference in values of fluorescence measurements obtained in laboratories around the year. Particularly in this year, the main goal of the Fifth International InterLaboratory Measurement Study is to investigate if the normalization of fluorescence measurements to the absolute cell count can contribute to the reduction of lab-to-lab variability in results. Our team, NU_Kazakhstan 2018, used the Varioskan LUX Multimode Microplate Reader to measure the fluorescence of DH 5 𝛼 cells transformed with the GFP inserted in pSB1C3 plasmid with different promoters (BBa_J364000, BBa_J364001, BBa_J364002, BBa_J364007, BBa_J364008, BBa_J364009, plus negative BBa_R0040 and positive BBa_I20270 controls).

Protocol

We strictly followed the instructions from the protocol provided by iGEM

Plate reader configuration:

Photometric

  • Wavelength: 600 nm
  • Bandwidth: 5 nm
  • Measurement time: 100 ms

    Fluorometric

  • Excitation Wavelength: 485 nm
  • Emission Wavelength: 530 nm
  • Excitation bandwidth: 12 nm
  • Fluorescence reading: top optics
  • Measurement time: 100 ms

    Results

    OD600 reference point


    Particle Standard Curve


    Fluorescein Standard Curve



    Plates for Colony Forming Units



    Raw Plate Measurement




    Conclusion

    The data from measurements shows that test device 4 (BBa_J364007) has the promoter with the highest fluorescence among the rest of the provided promoters. Its maximum value is 11.84 net fluorescein a.u. after 6 hours of incubation. The weakest promoter was found to be the test device 3 (max. value 0.48 net fluorescein a.u. at 6 hours). Samples transformed with test devices 1,5, and 6 have about similar results (approx. 2 net fluorescein a.u.). The fluorescence of samples transformed with test device 2 is slightly higher than these three. Its maximum value of fluorescence is 5.53 net fluorescein a.u.

    • Quick About

    SCHOOL OF SCIENCE AND TECHNOLOGY Nazarbayev University Astana, Kazakhstan

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    igem@nu.edu.kz

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