Would you expect the analytical results for ammonia-nitrogen to be higher than, lower than, or the same as the actual value in a sample of domestic wastewater that had been stored for several days prior to analysis without acidification?
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Would you expect the analytical results for ammonia-nitrogen to be higher than, lower than, or the same as the actual value in a sample of domestic wastewater that had been stored for several days prior to analysis without acidification?
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- Given a BSA stock solution of 4mg/mL how would you prepare a 5 mL sample with a final concentration of 1 mg/mL?Explain this example of the following water quality serial dilution. Note the dilution factors and how you would calculate #’s from the incubated plates. ……A serial dilution yielded TNTC in the 1:1 plate and the 1:10 plate, 50 cfu’s in the 1:100 plate and 3 cfu’s in the 1:1000 plate . What is the concentration (CFU)/ml of the raw sample? Is water acceptable for potable or Recreational use? Explain. When do you use filtration rather than serial dilutionTo make 100 ml 0.3% NP-40 solution for FISH post washing, how many ul 100% NP-40 solution is needed?
- The original concentration in a sample of kombucha is 2.79 x 10^6 CFU/ml. Which dilution would yield a countable plate? How would you make this? Show your calculations. Confused as to what's implied by "which dilution"? does it mean, how many times?Explain this example of the following water quality serial dilution. Note the dilution factors and how you would calculate #’s from the incubated plates. ……A serial dilution yielded TNTC in the 1:1 plate and the 1:10 plate, 10 cfu’s in the 1:100 plate and 1 cfu’s in the 1:1000 plate . What is the concentration (CFU)/ml of the raw sample?What is the minimum length of the column required to completely separate the amino acids? What is the time required for solvent elution (i.e. time for all amino acids to exit the column)?
- What is the purpose of: A. The concentrated salt solution? B. adding isopropyl alcohol to the solution? Why does it need to be in low temperature?What non-titrimetric method can be used to determine the iodine value of edible oil? Discuss its basic principles and general methods involved.A 2.5mg/ml solution of ampicillin is available for use, what volume would youadd to 200ml of LB medium to obtain a final concentration of 50µg/ml ofampicillin?
- A biochemist carefully measures the molarity of salt in 56. mL of photobacterium cell growth medium to be 82. mM. Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to 3.1 mL. Calculate the new molarity of salt in the photobacterium cell growth medium. Be sure your answer has the correct number of significant digits. | mMCompute the cfu/g (lactic acid bacteria and coliforms) of these samples given the following values below. Show your solution. Media First Sampling First Sampling First Sampling Second Sampling Second Sampling Second Sampling 10-2 10-3 10-4 10-2 10-3 10-4 VRBA TNTC, TNTC 243, 232 24,22 23, 25 0, 0 0, 0 MRS 32, 40 0, 0 0, 0 TNTC, TNTC TNTC, TNTC 102, 120If you have 50 ml of pure stock formalin solution how many ml of diluent will you need? What is the total volume of the reagent used you have prepared? Write down your answers with complete solutions and correct labels.