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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.
Explain process of Determination of vitamin B 6 Colorimetric determination of indophenol dye using 2,6-dichloroquinone chloraimide as colour reagent or diethyl-p-phenylenediam
Extraradicular Infections Whatever the cause of post endodontic disease we should do proper diagnosis to determine what is the cause; is it intra or extraradicular infection ,
Q. Why are vaccines used in the prevention but not in the treatment of infections? Why can antivenom serums be used in prevention and treatment? Vaccines are not used in the tr
If dimples may be considered a single-gene dominant trait, and 64% of the population features dimples, calculate the frequencies of heterozygotes and both types of homozygotes, ass
Fresh Water Water, a universal solvent, invariably contains many soluble salts. In fresh water the total salt content remains under 15 percent. Different types of soluble salts
Q. Generally which phase of the cell cycle has longer duration? The mitotic phase has quite a shorter length and the interphase comprises approximately 4/5 of the cell cycle.
Phototropism - Root and Shoot Morphogenesis Paratonic growth movement of part of a plant in response to light, e.g. bending of stems of indoor plants towards a window, brough
NEURITE S - The processes of neurons are called neurites. These are of two types: dendrites or dendrons and an axon or axis cylinder or neuraxon. (a) Dendrites (Den
What is the molecular composition of hemoglobin? Does the functionality of hemoglobin as a protein depend upon its tertiary or upon its quaternary structure? Hemoglobin is a mo
THE PHYSIOLOGY OF LACTATION
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