Podcast
Questions and Answers
What temperature and duration is required for flash pasteurization?
What temperature and duration is required for flash pasteurization?
- 82°C for 3 seconds
- 160°C for one hour
- 71.6°C for 15 seconds (correct)
- 265°C for 30 seconds
Which type of radiation is specifically known for damaging bacterial DNA at a wavelength of 265 nm?
Which type of radiation is specifically known for damaging bacterial DNA at a wavelength of 265 nm?
- Ultraviolet Irradiation (correct)
- Infrared Radiation
- Cosmic Radiation
- Ionizing Radiation
What is the primary use of hot oil at 160°C for one hour in medical settings?
What is the primary use of hot oil at 160°C for one hour in medical settings?
- Preservation of biological samples
- Reduction of air contamination
- Sterilization of instruments (correct)
- Disinfection of surfaces
Which of the following correctly describes ultra-pasteurization?
Which of the following correctly describes ultra-pasteurization?
Ionizing radiation, such as x-rays and gamma rays, destroys bacteria by which of the following mechanisms?
Ionizing radiation, such as x-rays and gamma rays, destroys bacteria by which of the following mechanisms?
Flashcards
Flash Pasteurization
Flash Pasteurization
A pasteurization method using a temperature of 71.6°C for 15 seconds. This process effectively kills harmful bacteria while preserving the quality of the product.
Ultra-Pasteurization
Ultra-Pasteurization
A pasteurization process using 82°C for 3 seconds. This method offers longer shelf life and is commonly used for milk and other dairy products.
Ultraviolet Irradiation
Ultraviolet Irradiation
A sterilization method using ultraviolet radiation, specifically wavelengths of 265 nm, to damage bacterial DNA and effectively kill them.
Ionizing Radiation
Ionizing Radiation
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Hot Oil Sterilization
Hot Oil Sterilization
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Study Notes
Flash Pasteurization
- Pasteurization method at 71.6°C for 15 seconds.
Ultra-Pasteurization
- Pasteurization method employing 82°C for 3 seconds.
Hot Oil Sterilization
- Some medical professionals use hot oil sterilization at 160°C for one hour to sterilize instruments.
Ultraviolet Irradiation
- Bacteria are often destroyed by UV light wavelengths of 265nm, which damages bacterial DNA.
- UV light's energy wavelength range is 100-400 nm.
- It's often used to decrease air contamination.
Ionizing Radiation
- X-rays and gamma rays can destroy bacteria by ejecting electrons from organic molecules.
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