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 Direct Microscopic Counts (DMC)
The process includes making a smear of food sample on a microscope slide followed by staining with an appropriate dye and viewing and counting under the microscope. It is widely used for assessing the microbial quality of the milk and dairy products (Breed Count).
The method involves spreading 0.01 ml of the milk sample on 1 cm area of a slide. After drying and staining the slide, average number of bacteria per microscopic field is counted. The diameter and area of the microscopic field is calculated by micrometry. Number of bacteria per ml of the milk sample is calculated as:
Number of bacteria/ml = average number of bacteria per microscopic field x number of field x dilution factor.
Number of Microscopic fields = area over which milk is spread ÷ area of one microscopic field = 100 mm2 ÷ 0.02 mm2 = 5000 field
Dilution factor = 100 (0.01 ml of the sample is plated)
It is rapid and simple method by which cell morphology can be detected. Efficiency can be increased by using fluorescent dye. The method, however, gives the count of both viable and nonviable cells. Sometimes food particles may not be distinguishable from microorganisms. Some microorganisms may not take stain and not be counted. In spite of these drawbacks, it is used for quick assessment of microbial quality of foods. The discussion above focused on the methods we can use to assess the microbiological quality of food samples.
Asexual Reproduction Asexual reproduction is also known agamic reproduction because there is no involvement of gametes in it. Asexual methods of reproduction are
function of cell coat
HOMEOS T ASI S - Homeo = same, Stasis = state Living beings maintain their internal environment by self regulating system, it is called homeostasis. Term coined by
Retina As invagination of the optic vesicle carries on to form the double walled optic cup the two layers of the optic cup start to differentiate in different directions. Pigm
how do humans reproduce?
Similarities in body parts often indicate shared ancestry. Which of the following is true? Structures used for different purposes in different groups can be controlled by the same
Define effect of Protein deficiency during pregnancy period? The effects of protein deficiency during pregnancy are difficult to separate from the effects of caloric deficit, s
Primary effects 1. Nuclear contamination 2. Biological contamination 3. Chemical contamination 4. Destruction of infrastructure facilities. 5.
Explain Preparation of burette for Estimation of Reducing Sugar by Fehling Soxhlet? Preparation of burette - Take a 50 ml burette. 1. Fix the burette into the burette holder
Incubator The incubators are essential to provide an ideal micro environment. The main functions are: isolation, maintenance of thermo neutral ambient temperature, desired h
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd