User:Keyun Wang/Notebook/Experimental Biological Chemistry I/2013/02/06: Difference between revisions
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|style="background-color: #EEE"|[[Image:owwnotebook_icon.png|128px]]<span style="font-size:22px;"> | |style="background-color: #EEE"|[[Image:owwnotebook_icon.png|128px]]<span style="font-size:22px;"> Experimental Biological Chemistry II</span> | ||
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== | ==Purpose== | ||
* | * Remake LB+agar plates | ||
* Make glycerol stock of DH10B and DH5α-T1 cells | |||
* Test absorbance of cells in culture grew last night for cell concentration | |||
==Procedure== | |||
* Because agar plates made on [[User:Keyun Wang/Notebook/Experimental Biological Chemistry I/2013/01/31|2013/01/31]] liquified, new plates were made. | |||
** 12.5g of LB media powder were weighted and placed in a 750mL Erlenmeyer flask. | |||
** 7.5g of Agar were weighted out and placed in the same 750mL Erlenmeyer flask. | |||
** 500mL distilled water was measured out and placed in the same 750mL Erlenmeyer flask. | |||
** The solution was autoclaved per liquid cycle. | |||
** After autoclave, the agar were placed in room temperature to cool down to 60°C. | |||
** Approximately 25mL of agar were poured into each petri dish. | |||
** The agar plates were left in room temperature under flame to solidify. | |||
** The agar plates were stored in fidge for future use. | |||
* Glycerol stock of the two cell lines: DH10B and DH5α-T1 cells were made for future use. | |||
** Two 5mL Gyro® Tubes were obtained, one for DH10B cells and another for DH5α-T1 cells. | |||
** 150mL of autoclaved 60% glycerol in water was pipetted into the Gyro® Tubes prior. | |||
** 850mL of DH10B cells, and 850mL of DH5α-T1 cells were pipetted into each of Gyro® Tubes, respectively. | |||
** Each cell culture containing the cell and glycerol were vortexed until mix. | |||
** Cells were placed in -80°C for storage. | |||
* Absorbance of cells were taken using UV-vis spectroscopy to measure the concentration of cells that had been grown over night. | |||
** UV-vis spectrometer was set under photometric method, with wavelength set at 650nm. | |||
** A distilled water sample placed in plastic cuvette was placed into the spectrometer to eliminate background noise. | |||
** 2mL of DH10B and DH5α-T1 cells were individually placed into the spectrometer to measure absorbance. | |||
** The absorbance for each cell after 15 hours of growth is shown in table below: | |||
* For future procedure on clay-incorporated silver, please refer to [[Melissa's Notebook]] | |||
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Revision as of 07:02, 8 February 2013
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Purpose
Procedure
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