PHYSICAL AND CHEMICAL AGENTS FOR THE CONTROL OF MICROBIAL GROWTH by azzam https://padlet.com/skylineturbo96/7p288zantxn7 Physical Agent of Control: Moist Heat (9/11/2016) en-us 2016-12-22 03:43:15 UTC 2026-02-02 03:38:09 UTC hello@padlet.com 80'C skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651609 2016-12-22 03:46:22 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651609 60'C skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651610 2016-12-22 03:46:22 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651610 25'C skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651611 2016-12-22 03:46:22 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651611 40'C skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651612 2016-12-22 03:46:23 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651612 100'C skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651613 2016-12-22 03:46:23 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651613 growth / growth skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651642 2016-12-22 03:47:36 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651642 growth / growth skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651658 2016-12-22 03:48:19 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651658 growth / growth skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651712 2016-12-22 03:52:20 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651712 no growth / growth skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651715 2016-12-22 03:52:46 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651715 no growth / no growth skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651717 2016-12-22 03:53:11 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651717 RESULTS and DISCUSSION skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651720 2016-12-22 03:53:31 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651720 Heat can be used to kill bacteria and any other forms of microorganisms. there are two types of heat sterilization : skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651730 -dry heat
-moist heat

Moist heat is more effective at killing bacteria compared to dry heat. It is due to hydrolyzing effect of water and greater penetration power. Also, moist heat require less heat to sterilize compared to dry heat. Lastly, moist heat can cause the coagulation of protein (or we can called the denaturation of proteins) which can interrupt the metabolism of the microorganisms. Examples of the use of moist heat are boiling, autoclaving, and pasteurization. In this experiment, waters were heated at 5 different temperatures that were used to demonstrate the effect of heat on the test microbes, Staphylococcus aureus and Bacillus cereus.]]> 2016-12-22 03:54:35 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651730 skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651851 At temperature 25'C to 60'C, both bacteria were able to survive. But at 80'C there was no growth observed for S. aureus but there was growth for B. cereus. B. cereus also able to survive at 80'C but at 100'C, there were no growth observed for both bacteria. This showed that B. cereus was more resistant to heat than S. aureus. This may be due to B. cereus able to form resistant endospore while S. aureus cannot. Also, from the result, it can be said that with increasing temperature, the rate of survival for each bacteria were reduced. ]]> 2016-12-22 04:03:54 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651851 CONCLUSION skylineturbo96 https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651969 B. cereus were more resistant to heat compared to S. aureus]]> 2016-12-22 04:10:52 UTC https://padlet.com/skylineturbo96/7p288zantxn7/wish/144651969