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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.
Ecosystem Balance We take up, another parameter of ecosystem balance. One factor that affects the stability or persistence of some ecosystems under small or moderate environme
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Determine what is dermal branchiae? External extensions of outer epidermis and peritoneum of the echinoderm body cavity. Both outer epidermis and inner peritoneum are lined wit
Lungs - Respiration Lungs can be simple, characterised by air exchange with surrounding environment by diffusion only. These are called the diffusion lungs and are present in
Woodland Stage - Hydrarch When the lowland has been built up to an extent where the soil is saturated perhaps only in spring and early summer, certain species of shrubs and tr
List a few important uses of food hydrocolloids. A few important uses of food hydrocolloids are: to increase viscosity and to stabilize food products. Its other uses include u
how does odysseus get the dead to talk to him?
Q. What is the life cycle of ascaris? The Adult ascaris that live within the human intestine can release up to 200 thousand eggs a day. The eggs are eradicating with human fece
The stress lab must have the following equipment: 1) A mercury Blood Pressure apparatus. 2) A Bed so that the patients ECG can be recorded in the recovery period in supine po
What is Cyanosis ? Cyanosis: Cyanosis may be peripheral or central. Peripheral cyanosis almost exclusively involves lips and extremities. Normal neonates may have bluish extrem
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