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Heat killed S bacteria in Griffith's experiment was because of the temperature of the heat. The heat was high enough to kill many things like proteins and enzymes, so the bacteria could not create endospores to harm the immune system.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoBecause the heat caused the S cell to have a heat stroke
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Why does your central heat blow cool air when it comes on?
If it`s a heat pump, they do that, heat is not instantaneous with them. If it`s a furnace the fan/limit switch or fan delay timer whichever you have, needs to be adjusted.
What is the specific heat of a substance that has a mass of 25 grams and requires 525 calories to raise its temperature by 15 degrees celsius?
We know that Q=m.s.t, where Q= Heat, s= Specific heat of the substance, t=temperature(Difference in temperatures) =>s= Q/m.t =>s=525/(25X15) =>s=525/375 =>s=1.4 cal/g/0c Specific heat of the substance is 1.4 cal/g/0c.
Was Bacteria first discovered in the 1970's?
Yes, Louis Pasteur did. He also invented pasteurization.
What is the difference between sanitization and sterilization?
Sanitizing is the process of killing and/or removing bacteria and microbes with chemicals. The effectiveness of sanitizing is determined by the chemical(s) used.For example: Plain water is an effective neutral sanitizer for removing most microbes from surfaces. However, it is not effective for killing most bacteria or microbes. Alcohol is effective for killing and removing most bacteria and microbes.Sterilization is the process of killing bacteria and microbes with heat. The effectiveness of sterilization is determined by the level of heat used.Example: 160°F will kill most all bacteria and microbes that are known to be harmful to human life. However, there are microbes that may withstand temperatures up to 867.2°F. This means that it is impractical to achieve 100% sterilization.Common MisconceptionsSanitizing and sterilization are the same. That notion is incorrect. Sanitizing is chemical and sterilization is thermal.That either process is more or less effective than the other. That notion is incorrect. The effectiveness of sanitizing is determined by the chemical(s) used. And the effectiveness of sterilization is determined by the temperature.That 100% sanitation and/or sterilization is practical. That notion is incorrect. There is no process that is capable of killing all life on a treated material, leaving the material undamaged and leaving the material safe to use. As someone once said... "If you can find a substance that is resistant to everything you'll find a form of life that wants to eat it or live in it."
What two properties of metals is suitable for saucepans?
To be able to radiate heat easily and to have a high melting point.
What are 4 steps in Griffith's experiments?
S Strain ---> inject into mice ---> Mice Die R Strain ---> inject into mice ---> Mice Live Griffith was able to kill bacteria by heating them. He observed that heat-killed S Strain bacteria injected into mice did not kill them. When he S Strain (heat Killed) ---> Injected into mice ---> Mice Live S Strain ( heat Killed) + R Strain (Live) ---> Injected into mice ---> Mice Die
What has the author Robert Porter Griffiths written?
Robert Porter Griffiths has written: 'Glucose uptake and catabolism in the marine psychrophilic bacterium, Vibrio marinus' -- subject(s): Metabolism, Psychrophilic bacteria, Glucose
Why was the mixture of heat killed s bacteria and r bacteria virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
When did Lynne S. Warm-Griffiths die?
Lynne S. Warm-Griffiths died on 1990-08-22.
When was Lynne S. Warm-Griffiths born?
Lynne S. Warm-Griffiths was born on 1923-07-26.
What has the author Dan Griffiths written?
Dan Griffiths has written: 'What is socialism?' -- subject(s): Socialism
What has the author Thomas S Griffiths written?
Thomas S. Griffiths has written: 'A history of Baptists in New Jersey' -- subject(s): Baptists, Religion, History
What has the author Gertrude Griffiths written?
Gertrude Griffiths has written: 'The wedding gown of \\' -- subject(s): Fiction
What effect did an injection of live R bacteria mixed with heat killed S bacteria have on the mice?
The mice injected with mixture died
Why was the mixture of heat-killed S bacteria and R bacteria and R bacteria virulent?
It depends on how much heat is added. Most pathogenic bacteria are mesophiles, meaning that they thrive in medium temperatures. The optimal temperature is about 37 °C (99 °F), which is understandable considering that is our normal body temperature. Pathogenes in food are required to be killed off with 72 °C for 16 seconds, 70 °C for 2 minutes or 63 °C for 30 min. Regulations depend on country. This does not kill all pathogens, but enough to make it risk free to consume; one wants to reduce the adverse effect on taste at the same time. For conserves a higher temperature is prescribed: 121 °C. Freezing and dry heat are not safe ways to kill bacteria, as they can survive in an extremely resistant spore state (endospores). At 150 °C the DNA starts to be destroyed, however. If you heat bacteria using flame, such as with an inoculating loop over a Bunsen burner, they will be incinerated and die. Most bacteria are washed off, not killed, when you wash your hands. Usually shower and bath water is not hot enough to kill bacteria either. Alcohol is antiseptic, however. Some thermophilic bacterialike organisms can tolerate volcanic temperatures (to 130 °C), but these are archaea that will not harm anyone.
What has the author George Griffiths written?
George Griffiths has written: 'Chronicles of the County Wexford' -- subject(s): History
What has the author Samuel Griffiths written?
Samuel Griffiths has written: 'Griffiths' Guide to the iron trade of Great Britain ...' -- subject(s): Coal trade, Iron industry and trade
