Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain the Presumptive Test - Most Probable Number Test?
The Presumptive test is used to detect and estimate coliform population of a water sample. This test is carried out by inoculating a series of lactose broth medium with three different sample volumes (10 ml, 1 ml and 0.1 ml). The series consists of 3 groups, each composed of 5 tubes and each group is inoculated with the designated volume of the water sample. The greater the number of tubes per group, the greater the sensitivity of the test. Lactose medium contains the lactose, bile salt and pH indicator.
Lactose and bile salts are selective for coliforms as lactose is used only by coliforms and not by other enteric bacteria while bile salts are depressent for enteric bacteria other than coliforms. A pH indicator such as bromocresol purple is added to the medium to detect acid fermentation from lactose. Production of acid changes the colour of the medium to yellow. Gas production during fermentation is detected by inverted Durham tube in lactose medium. Positive test for coliforms is indicated by the production of acid and gas from lactose fermentation after 24-48 hours of incubation. Number of tubes showing positive test is counted and the result is expressed as most probable number (MPN) of coliforms by matching the results
Carrageenan Carrageenan is a collective term for polysaccharides prepared by alkaline extraction (and modification) from red seaweed (Rhodophycae). Carrageenan is a sulfated ga
Define Vitamins requirement to avoid underweight problem? Vitamins and Minerals: If the diet provides good amounts of fresh fruits and vegetables, vitamin or mineral supplement
WHAT IS SYMBIOTIC THEORY. PLEASE EXPLAIN THIS TO ME IN A VERY SIMPLE WAY.
Q. What do you undersand by pollution? The Pollution is the contamination of an ecosystem by factors that are harmful for the equilibrium of its abiotic or biotic constituents.
Approaches to Neuropsychological Assessment Probably the most useful model of neuropsychological interpretation is described in Reitan and Wolfson's (1993) four approaches to a
Define characteristics of prebiotics? Characteristics of prebiotics Are non-digestible dietary/food ingredients Are not hydrolyzed/absorbed in the upper GIT, reach
what are the levels of divercity
Growth Charts Management alone without any standard of comparison do not serve useful purpose. A number of standards have been developed to compare the measurement of any
In a Population that is in Hardy-Weinberg equilibrium, the frequency of the recessive Homozygous genotype is 0.49. The frequency of individuals Homozygous for the Dominant allele i
what are peptides and poly peptides hormones
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd