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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.
what is the prevailing wind direction in equatorial regions affected by the trade winds? a) The wind blows from east to west b) the wind blows from west to east
Complete Metamorphosis In all Endopterygota insects, where wings and other structures develop internally, (in invaginate imaginal epidermal pockets) such as beetles, wasps, b
Advantages of ecological pyramids?
SOM E COMMON REFLEXES RELATED TO RESPIRATION - 1. Cough Reflex: Due to stimulation in Trachea before it 2.5 lit. air is inhaled. 2. Sneezing Reflex: Stimulati
Success which signifies Optimum Health The features or clinical conditions which are representative of this group are: i) No pain or tenderness in the implant upon function.
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Primary amines can act as bases; they can- Select one: a. Absorb a proton to become R-NH2+2 b. Release a proton to become R-NH2+ c. Absorb a proton to become R-NH3+
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