Explain the voges proskauer (vp) test, Biology

Assignment Help:

Explain the Voges Proskauer (VP) Test?

As it has been discussed in previous exercise, second group of enteric bacteria produces acid during early incubation which rapidly converted to non-acidic components, i.e., 2, 3 butanediol and acetoin (acetylmethylcarbinol). These components can be detected by using Barritt's reagent, which is a mixture of alcoholic alpha-naphthol and 40% potassium hydroxide solution.

Acetylmethylcarbinol is oxidized to a diacetyl compound in presence of the alpha-naphthol catalyst and a guanidine group present in the peptone of MR-VP medium. This results in formation of a pink complex imparting rose red colouration to a medium after 15 minutes. Development of rose red colour indicates positive VP reaction while absence of it is a negative result.


Related Discussions:- Explain the voges proskauer (vp) test

Heterotrophic plant, #question.name any two plants having heterotrophic mod...

#question.name any two plants having heterotrophic mode of nutrition .

Explain glucokinase, Glucokinase In the fed state, clearance of blood  ...

Glucokinase In the fed state, clearance of blood  glucose is mainly by  liver via glucokinase. Glucokinase, which  is an  inducible enzyme, removes most of the blood glucose fr

What are the benefits of diet modification, Benefits of diet modification a...

Benefits of diet modification are: 1) Control of sugar. 2) Control of weight. 3) Control of blood pressure. 4) Control of lipid profile. 5) Good health and well bei

Acute complications of diabetes, Q. Show Acute Complications of Diabetes? ...

Q. Show Acute Complications of Diabetes? Acute complications of diabetes include: Hypoglycemia or low blood sugar: The most frequent cause of low blood sugar is poor timing

Explain the cell division, What is the cell division during the first stage...

What is the cell division during the first stage of the embryonic development called? How is this stage characterized? The cell division in the first stage of the embryonic de

Determine the urine analysis, Determine the Urine analysis Urine consti...

Determine the Urine analysis Urine constituent may be altered in urinary tract infection, systemic disease. However it is not routinely prescribed for most of the potential imp

What is the goal of biological classification, The goals of biological clas...

The goals of biological classification The world of animal diversity is quite complex and it requires an ability to recognise similarities and differences among organisms. Class

Explain biological aspects of nutrition, Explain biological aspects of nutr...

Explain biological aspects of nutrition Traditionally nutritionists have focused largely (or almost fully) on . However, we have realized over the years, that physiological bio

Viruses, what is the crystallization of a virus? what is the importance of ...

what is the crystallization of a virus? what is the importance of this process?

Define non-dietary treatment of burns, Define Non-Dietary Treatment of Burn...

Define Non-Dietary Treatment of Burns? While good nutritional care should be provided to the patient as soon as feasible it is equally imperative and at times critical to provi

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