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 Functionality of Hot Air Oven?
Hot air oven sterilizes the object by hot dry air. It kills the microorganisms by oxidizing cellular constituents. Dry Heat is less effective in killing microorganisms than moist heat. Higher temperature for a longer time period is used with dry air because it-
(i) Has less penetration power, and
(ii) Removes moisture from microorganisms and thus interferes with coagulation of microbial proteins.
Hot air oven can be used at different temperatures. Operating time depends on the temperatures used as highlighted in Table.
Table: Relation between temperature of hot air oven and the time period of sterilization
You would realize that the most commonly used temperature is 160° C for 2 hours. We are all familiar with hot air ovens. Hot air oven contains an insulated cabinet kept at constant temperature by electric heating mechanism and thermostat. Air keeps on circulating within the cabinet through a fan. For proper circulation of hot air, the shelves are perforated. An oven is used to sterilize glassware, corrodeable metal instruments, powder, oil etc. which can tolerate prolonged heat exposure but get spoiled by moist heat. However, it is not suitable for heat sensitive materials, like plastic and rubber items.
Explain the Most Probable Number (MPN) Techniques? Different procedures and media may be used depending on the food tested and the information sought. Media which can be used i
what are the examples of sex-influenced traits in human?
Hydrocele A hydrocele is a painless water-filled cyst found in front of the testis.It is brightly translucent and cannot be emptied by pressure of a 'flap valve' at its jun
What is Skeletal Biology? What is specification of Skeletal Biology? Describe please.
Nitrogen Cycle The nitrogen is an essential constituent of protein - the building block of all living cells. It is also a major constituent of the atmosphere (79 per cent). Al
State four steps to be followed to test for starch in a leaf
Classification of Living Organisms The world of living organisms is extremely diverse. Biologists call these diverse forms 'species'. It is estimated that over fifteen lakh (1
Animal Tissue A tissue is a group of cells that are similar in structure, origin and function. Tissue word coined by Bichat (Father of Histology). Histology term
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Q. How are the major classes of arthropods classified according to the presence of larval stage in their embryonic development? In crustaceans there are others with indirect an
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