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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.
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If a person wants to make a room free from microbes and their spores what sterilization method would you advice him to use?
dry heat sterilization
Which is hotter moist heat or dry heat?
Conductivity. Moisture conducts the heat better than a dry system.
What is the definition of moist heat sterilization?
Dry-heat sterilization is generally a less complicated process than steam sterilization; it is, however, relatively slow and requires higher 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.
What is the example of Dry heat sterilization?
we have 4 types for dry heat steralization 1.red heat eg. heating of platinum loop,points of forceps 2.flaming eg. used for needles,mouth of culture tubes 3.hot air oven temp. of 160 c fpr 1 hr is employed and its the best method for stterelization dry glasswares,forceps,scalpels,powders,fat oils, greases. 4.infra red radiation the source employed is an electrically heat element a temp. of 180 c can be attained
What is the advantage of wet method over dry method in chemistry analyzer?
It is easier to use
If a person wants to make a room free from microbes and their spores what sterilization method would you advice him to use?
dry heat sterilization
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.
Which is hotter moist heat or dry heat?
Conductivity. Moisture conducts the heat better than a dry system.
Which does not achieve sterilization formaldehyde pasteurization dry heat ethylene oxide autoclave?
Pasteurization
Compare the effectiveness of autoclaving and dry heat method?
Steam sterilization uses much less energy and time than dry heat methods. In order to kill spores a dry heat sterilizer needs to reach and maintain 170°C for one hour. An autoclave only needs to reach 121°C for 15 minutes.
What is the definition of moist heat sterilization?
Dry-heat sterilization is generally a less complicated process than steam sterilization; it is, however, relatively slow and requires higher 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.
What is principle of hot air oven?
A hot air oven is usually used for sterilizing items. They are very common in places like tattoo parlors, for example.
What is the relationship of time to temperatures in heat sterilization?
Dry heat = 1-2hrs @ 160-170 degrees Celsius Moist heat = 15min. @ 121 degrees Celsius
Why Moist heat sterilization is more effective than Dry heat sterilization?
Mechanism of killing by dry heatDry heat kills the organisms by destructive oxidation of essential cell constituentsKilling of the most resistant spores by dry heat requires a temperature of about 160 °C for 60 minutesDry 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 heatMoist 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 penetrateMoist heat is more effective than dry heatSterilization 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
What kills micro-organisms?
Sterilization by various means such as steam sterilization (autoclave), dry heat (hot air oven), radiation (ionising & non-ionising),chemical methods etc. kills microorganisms.
What method did earliest people use to cook food?
what method did earliest people use to cook food first? dry heat or moist heat
What is a dry-heat method that uses a rack and open pan?
Convection.
