Define plate counts and colony forming unit, Biology

Assignment Help:

Define Plate Counts and Colony Forming Unit?

Plate counts is the most frequently used method to measure microbial numbers. The technique, however, can be used only for those microorganisms, which are able to grow and reproduce on microbial media. Here a diluted sample of microbes is dispersed over suitable nutrient agar medium. There are two ways of performing a plate count - the spread plate and pour plate technique about which we have already studied in the last practical. Look up these techniques once again. Each microorganism then produces a distinct colony. Original number of viable microorganism in a sample is then calculated from the number of colonies formed and the sample dilution used. The results are reported in form of colony forming units (CFU) per ml of the sample.

Colony forming unit/ml can be expressed as:

CFU/ml = (No. of colonies formed * dilution factor) / Volume Sampled


Related Discussions:- Define plate counts and colony forming unit

Research, i want to online research biology projects

i want to online research biology projects

What is the evolutionary origin of the internal membranous, What is the evo...

What is the evolutionary origin of the internal membranous organelles of the cell? It is accepted that the internal membranous organelles of the eukaryotic, like the Golgi app

Define fat requirement for cancer patients, Define Fat requirement for canc...

Define Fat requirement for cancer patients? During cancer there is enhanced mobilization of free fatty acids from adipose tissues resulting in subsequent depletion of total bod

Explain separation of homologous chromosomes, Q. What are the respective fu...

Q. What are the respective functions of the separation of homologous chromosomes and of the separation of alike chromatids in meiosis? The separation of homologous chromosomes

Zoology, #question.characteristics of coelenterata?.

#question.characteristics of coelenterata?.

CYTON, WHAT DOES CYTON HAVE TO DO WITH NEURON

WHAT DOES CYTON HAVE TO DO WITH NEURON

What is the rule for the pairing of nitrogen-containing base, Q. What is th...

Q. What is the rule for the pairing of nitrogen-containing bases in the DNA molecule? And in the RNA? Is this the last question appropriate? The rule for the pairing of nitroge

Rhinosporidiosis (fungal-like agent), Rhinosporidiosis (Fungal-like agent) ...

Rhinosporidiosis (Fungal-like agent) Rhinosporidiosis is a chronic, non-fatal, granulomatous mycotic infection of nasal mucosa caused by Rhinosporidium seberi. R. seberi is curren

Iodine test, what will happen to a plant kept in dark for 72 hours

what will happen to a plant kept in dark for 72 hours

An experiment with a floating egg, An experiment with a floating egg Pl...

An experiment with a floating egg Place an egg in a glass of fresh water and view it. Next add salt to the water and see if you can float the egg. How does this relate to the f

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd