Question

Explain how microbial growth is measured indirectly?

Explain how microbial growth is measured indirectly?

Homework Answers

Answer #1
  1. A microbial growth can be measured indirectly by using turbidometry methods. Microbial growth can be observed by the intensity or turbidity of the solution/ growth medium. A spectrophotometer can measure the turbidity of a solution and giving an absorbance value directly proportional to the concentration of microbial cells.
  2. The microbial cell mass can also be weighed in dry or wet form by discarding the solution and leaving the cell mass.
  3. One can also measure the cell mass by measuring the oxygen content, nutrient utilization, acid production, secondary metabolite production, etc.
  4. Microbial cells can also be counted using a scintillation counter. One can also use hemocytometer.
  5. Indirect labeling and counting of cells is another indirect approach of measuring microbial growth.
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