15.Flash pasteurization which consists of boiling the milk at 72C for 20 seconds. 16.A lower concentration of disinfectant or sterilizing. T 17.Chemical that kills or inhibits microbes and can be safely used on the skin is called che, T 18.A hot air oven at 180C for 30 min is very effective in killing bacteria. T 19.The killing of only vegetative forms of pathogenic microorganisms and not spores on non-living objects is called sterilization. F 20.Bactericide is a term used to describe agents that prevent or inhibit bacterial growth. F 21.TDT, which is defined as: the lowest temperature at which suspension of microorganisms is killed within 10 minutes. F 22.lonizing radiation are more powerful than non-ionizing radiation in the sterilization of pla. T
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Flash pasteurization consists of boiling the milk at $72^\circ C$ for $20$ seconds. Show more…
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Pasteurization is the use of heat to sterilize food products, reducing pathogenic/spoilage bacteria to a safe level. It is not a process that uses intense cold or radiation to kill microorganisms on foods.
Suman K.
7. M. luteus is commonly found in dairy products. If you were to pasteurize the dairy products to get rid of M. luteus, you would be killing the microbes by A. oxidizing them B. disrupting active sites with heavy metals C. damaging the covalent bonds with radiation D. denaturing the proteins with surfactants E. none of the above 8-10. Match the description with the metabolism type: 8. ___ halophile 9. ___ acidophile 10. ___ psychrophile A. adapted to thrive in low temperature conditions B. adapted to thrive in low pH conditions C. adapted to thrive in high salt environments D. adapted to thrive in higher CO2 conditions E. adapted to thrive in moderate temperature conditions 11. Which is a micronutrient? A. N B. C C. Fe D. O 12. If you were cleaning a patient you knew had Clostridium difficile, and you had touched endospore-contaminated materials, which would be the safest alternative to clean your hands? A. Surfactant degermination with rinsing B. Phenol antisepsis C. Alcohol antisepsis D. 30 second nonionizing radiation disinfection
Sri K.
7-1 Define the following key terms related to microbial control: sterilization, disinfection, antisepsis, degerming, sanitization, biocide, germicide, bacteriostasis, and asepsis. 7-2 Describe the patterns of microbial death caused by treatments with microbial control agents. 7-3 Describe the effects of microbial control agents on cellular structures. 7-4 Compare the effectiveness of moist heat (boiling, autoclaving, pasteurization) and dry heat. 7-5 Describe how filtration, low temperatures, high pressure, desiccation, and osmotic pressure suppress microbial growth. 7-6 Explain how radiation kills cells. 7-7 List the factors related to effective disinfection. 7-8 Interpret the results of use-dilution tests and the disk-diffusion method. 7-9 Identify the methods of action and preferred uses of chemical disinfectants. 7-10 Differentiate halogens used as antiseptics from halogens used as disinfectants. 7-11 Identify the appropriate uses for surface-active agents. 7-12 List the advantages of glutaraldehyde over other chemical disinfectants.
Madhur L.
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