Explain the functionality of hot air oven, Biology

Assignment Help:

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

2474_Hot Air Oven.png

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.


Related Discussions:- Explain the functionality of hot air oven

State the effects of smoking for diabetics patient, State the Effects of al...

State the Effects of alcohol and smoking for diabetics patient A major concern with alcohol consumption is the potential danger of hypoglycaemia (low blood sugar), especially w

Differences between ecosystems, Some ecosystems possess relatively large nu...

Some ecosystems possess relatively large number of species as compared to others. This is particularly true of tropical forests which exhibit a very rich-biodiversity. For example,

What do you mean by high level of behavioral sophistication, Q What are the...

Q What are the few examples of beings of the phylum Arthropoda that present a high level of behavioral sophistication? Insects like some species of wasps, bees, termites and an

Phosphorus cycle - nutrient cycles, Phosphorus Cycle - Nutrient Cycles ...

Phosphorus Cycle - Nutrient Cycles Phosphorus is a very important nutrient because of its role in the form of phosphate, in reactions that store and release energy. The availa

Explain adaptive radiation, Adaptive radiation: The growth of a variety of...

Adaptive radiation: The growth of a variety of species from the single ancestral form; occurs when a new habitat becomes accessible to a population. The evolutionary pattern of di

Explain minerals requirement during thyphoid, Explain Minerals requirement ...

Explain Minerals requirement during thyphoid Minerals:   Loss of electrolytes and water is observed due to diarrhoea. Thus liberalizing on sodium intake  through salty soups,

Write short notes on urine, Write short notes on Urine? The concentrate...

Write short notes on Urine? The concentrated filtrate produced by the kidney is called urine, and is composed mainly of water, urea, toxins, and mineral salts. Urine from the c

How hermaphrodite species present cross-fecundation, Is it possible for a h...

Is it possible for a hermaphrodite species to present cross-fecundation? There are hermaphrodite species of animals and plants that present cross-fecundation mainly because of

What is the meaning of darwins expression, What is the meaning of Darwin's ...

What is the meaning of Darwin's expression "descent with modification"? Descent with modification refers to natural selection. Descent with modification refers to evolutionary chan

Why is the cartilage more flexible than bone, why is the cartilage more fle...

why is the cartilage more flexible than bone? in general, why does cartilage take longer to repair than bone?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd