What do to do when the disstillation did not make the sample completely pure? What could have went wrong
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What do to do when the disstillation did not make the sample completely pure? What could have went wrong?
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- What special precautions must be taken when using the oil immersion (100x) objective?Mary Jo prepared a series of diluted samples by taking 1 mL of sample and adding it to 4 mLs of diluent. She then diluted the sample further by adding 1 mL of diluted sample to 19 mLs of diluent. What is the final dilution factor ?How would you determine the contents of the test tubes if all of the samples were transparent?
- What is the nature of samples that should NOT be placed inside the drying-oven?What are the possible sources of contamination that may result during the streak plate procedure?A plate has 72 colonies with a total dilution factor of 10-7, 0.1 ml was pipetted onto the plate, what was the original CFU/ml concentration of that sample?
- If any of the water sample plates had a lawn or too many colonies to count, what might you have done, without reducing the volume of liquid you added to the plate, so that you had ended with a countable number of colonies?Why is the incubation temperature criticalwhen using the Filter Method when testing water samples?In the Harada-Mori culture technique, how are you going to dispose the culture tubes? Is it suitable to use refrigerated samples for this procedure Why or Why not?