Define the utilization of most probable number techniques, Biology

Assignment Help:

Define the Utilization of Most Probable Number Techniques?

The MPN technique (multiple tube technique) can be used to determine the presumptive coliform count in the food. The sample is homogenized adequately and decimally diluted in saline solution or peptone water. Measured portion (e.g. 1 ml) of the solution and dilutions is transferred into multiple tubes (3 or 5) of selective and differential medium e.g. LST and incubated at 35°C for 48 hours.

Production of gas in inverted Durham tube by lactose fermentation indicates coliforms. By using standard MPN tables, as given herewith, MPN/ml or MPN/g of food samples is derived from number of positive tubes at 3 successive dilutions.The method was given by Mc Crady in 1915 and is statistically based. Three tubes or five tubes method can be used by inoculating 3 serial dilution of the sample into 9 or 15 tubes of appropriate medium respectively. The number of organisms in the original sample is determined by using standard MPN table as we have already studied in the last practical.


Related Discussions:- Define the utilization of most probable number techniques

What are imago and nymph, Q. What are imago and nymph? Nymphs are larva...

Q. What are imago and nymph? Nymphs are larvae of hemimetabolic insects (like grasshoppers). They are very similar to the adult insect although smaller, In holometabolic insect

What is the main theory opposed to evolution, What is the main theory oppos...

What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the description of how species emerged (phylogenesis) is fixism.

Explain gastrointestinal, Gastrointestinal Antibiotic prophylaxis is re...

Gastrointestinal Antibiotic prophylaxis is recommended for esophageal surgery in the presence of obstruction, which increases the risk of infection. After gas troduodenal surge

Homogeneity to the nucleic acid chains, Q. Do the phosphate and the pentose...

Q. Do the phosphate and the pentose groups give heterogeneity or homogeneity to the nucleic acid chains? What about the nitrogen- containing groups? Supported by that, which of tho

Food and diet, state one benefit of including vegetable fibre in the diet

state one benefit of including vegetable fibre in the diet

What is the endoplasmic reticulum, What is the Endoplasmic Reticulum Th...

What is the Endoplasmic Reticulum The cytoplasm of most eukaryotic cells contains a very complex network of internal membranes, called the endoplasmic reticulum, which forms ch

What are the classification of reasons of implant failure, Classification o...

Classification of the reasons of implant failure: In order to understand failures it is vital to know, why they occur. The reasons are plenty and to streamline, these have been

How much time is required for a single cell, How much time is required for ...

How much time is required for a single cell of Detoxivicatium completeium to grown into a population large enough to fill the volume of the earth?

Female reproductive system from the external vulva, Q. What are the anatomi...

Q. What are the anatomical relationships between the organs of the female reproductive system from the external vulva to the ovaries? The external female genitalia are called t

Normality, what is the normality law?

what is the normality law?

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