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Dry heat = 1-2hrs @ 160-170 degrees Celsius

Moist heat = 15min. @ 121 degrees Celsius

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Why is the time of exposure and temperature required for sterilization greater for dry heat than for autoclaving?

Dry heat sterilization requires longer exposure times and higher temperatures because it relies on the transfer of heat through conduction. This method requires the heat to penetrate the material being sterilized gradually, which takes more time and higher temperatures to achieve the desired level of sterilization compared to autoclaving, which uses steam under pressure to rapidly heat and sterilize materials.


How do you sterilizing avicel?

To sterilize Avicel, you can use methods like autoclaving or dry heat sterilization. Autoclaving involves subjecting Avicel to high temperature and pressure steam for a set period of time to kill microorganisms. Dry heat sterilization involves exposing Avicel to high temperatures in an oven for a specified duration. It is important to follow the manufacturer's guidelines for sterilization to ensure effectiveness.


Can dry heat kill spores?

Yes, dry heat can kill spores at high temperatures over a period of time. Spores are more resistant to heat compared to other forms of microorganisms, so longer exposure to high heat is required for effective sterilization.


How stainless steel instrument can be sterlize?

Stainless steel instruments can be sterilized by using methods such as autoclaving, chemical sterilization, or dry heat sterilization. Autoclaving is the most common method where instruments are exposed to high pressure steam at a specific temperature for a set amount of time to kill microorganisms. Chemical sterilization involves immersing instruments in a solution of chemicals to kill pathogens, while dry heat sterilization uses high temperatures in an oven-like device to achieve sterility.


What is holding time in sterilisation?

Holding time in sterilization refers to the amount of time that sterilized items must be kept in the sterilization equipment after completion of the sterilization process. This allows for any residual heat or chemicals to dissipate before the items are removed, ensuring their safety and efficacy.


What is the difference between sterilization and canning?

Sterilization is a process of killing all microorganisms in a specific environment, such as in medical equipment or laboratory materials, whereas canning is a method of preserving food by heating it in airtight containers to kill bacteria and prevent spoilage. Sterilization is typically done at higher temperatures for longer periods to achieve complete elimination of microorganisms, while canning focuses on preserving food for consumption at a later time.


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


Factors determine the time period necessary for steam-pressure sterilization?

The main factors that determine the time period necessary for steam-pressure sterilization include the type and quantity of items being sterilized, the temperature and pressure of the steam, and the material composition of the items. Generally, higher temperatures and pressures result in shorter sterilization times, but specific guidelines for different materials and organisms should be followed to ensure effective sterilization.


What do you mean by equilibrium time in sterilization?

Equilibrium time in sterilization refers to the amount of time required for the sterilizing agent to reach a balanced concentration throughout the sterilization chamber, ensuring effective sterilization of the contents inside. It is important to maintain this equilibrium to achieve consistent and reliable sterilization results.


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


How can a pressure cooker autoclave be used effectively for sterilization purposes?

A pressure cooker autoclave can be used effectively for sterilization by using high pressure and steam to kill bacteria and other microorganisms on items such as medical instruments or laboratory equipment. The high pressure and heat created inside the autoclave can reach temperatures high enough to effectively sterilize the items within a short amount of time. It is important to follow proper procedures and guidelines to ensure that the sterilization process is successful and that the items are safe to use.


Do endothermic organisms temperatures rise and the temperatures rise?

endothermic means it is absorbing heat. the heat within the organism would be warmer than the surrounding environment over time.