Comparison between dry heat sterilization and moist heat sterilization?
Mechanism of killing by dry heat
Mechanism of killing by moist heat
- Dry heat kills the organisms by destructive oxidation of essential cell constituents
- Killing of the most resistant spores by dry heat requires a temperature of about 160 °C for 60 minutes
- Dry heat is employed for glassware; syringes, metal instruments and paper wrapped goods, which are not spoiled by high temperatures.
- It is also used for anhydrous fats, oils and powders that are impermeable to moisture.
Mechanism of killing by moist heat
- Moist heat kills the organisms by coagulating and denaturing their enzymes and structural protein.
- Sterilization by moist heat of the most resistant spores generally requires 121 °C for 15-30 minutes.
- Moist heat is used for the sterilization of culture media, and all other materials through which steam can penetrate
- Moist heat is more effective than dry heat
- Sterilization can be done at lower temperatures in a given time at a shorter duration at the same temperature.
- upon heating wet proteins release free -sh groups and form smaller peptide chains which in turn form new complexes different from the orignal protein molecules
29 people found this useful
Dry Heat Sterilization by Devansh . Dry-heat sterilization is generally a less complicated process than steam sterilization; it is, however, relatively slow and requires hi…gher temperatures and/or longer exposure times. This is because of the fact that microbial lethality is lower with dry heat than that for steam at the same temperature.
it is steam sterlization in which temp & pressure both works
Sterilization with steam under pressure. mainly at 121 degrees C, 15 pounds of pressure and for 20 mins. Pressure should be 1.2 Kg/cm
What are the application and relative advantages and disadvantages of dry heat and moist heat sterilization?
Advantages: 1. It is faster method of sterilization then dry heat method. 2. Additional parameter "pressure" is involved 3. We can easily sterilize the media solution. 4. It …faster method of sterilization. Disadvantages: 1. Glass ware might get broken down. 2. Mishandling may lead to serious accident or explosion.
Why does dry heat require higher temperatures for longer time periods to sterilize than does moist heat?
Water has a higher heat capacity than air. In other words, air is a very poor conductor of heat while water is a very efficient conductor of heat.
Mosit heat sterilization is better than dry heat serilization specailly for liquid mideas.
It is very effective at sterilizing the pieces you need cleaned. Itis also fairly quick and easy to do.
WELL! moist heat is used by heating with steam and the steam can not be formed below 100 o C so it is not possible to kill microorganism by moist heat below hundred degree
The production of healthy sperm requires a cool environment, about 3 or 4 degrees C lower than core temperature. Thus keeping the testicles warm will result in malformed batch…ed or sperm that will be next to usless fertily. But this will only affect the batched produced when the testicles are warm and so no long term effects like sterility occur.
because dry heat transfers heat less effectively to a cool body than moist heat does.
no advantages if to me...if you think it have and advantage then do not use it ok??...why you such a suck idiot to ask something like that
Heating something until all the germs and bacteria has died.
I guess so, and that's why you put out the flame after that.
If we limit our discussion to the enveloped viruses HIV, HCV and HBV, then lyophilization is a sterilization method as explained in my recent article [Cell Tissue Bank (2011) …12:99-104]. Desiccation of the lipid envelops inactivates these viruses.
Bleach, peroxide, bromine, and rubbing alcohol just to name a few
High temperature destroys microorganisms .Moist and dry heat destroy parts of microbes via oxidation and incineration .
Dry heat is the absolute substance temperature without accounting for the modulating effects of water vapor in the substance. Moist heat is the relative substance temperature …when accounting for the modulating effects of water vapor.