Effect Of Time In A Microwave On Micrococcus Luteus
School Name
Heathwood Hall Episcopal School
Grade Level
9th Grade
Presentation Topic
Consumer Science
Presentation Type
Non-Mentored
Abstract
This experiment studied the effect of time in a microwave on growth of Micrococcus luteus. Micrococcus luteus was introduced onto pieces of turkey to be microwaved (1350 W). The hypothesis is that the turkey in the microwaved for 0 seconds would have more growth than on the 25 second turkey slices did. These pieces of turkey were cut into congruent circles. The bacterial broth was mixed with two 125 mL bottles of nutrient broth to increase the amount of bacteria that was used. The broths incubated for two days in 25ºC. The slices of turkey were fully submerged in the bacterial broth. The new infected slices of turkey were microwaved for four different times with four slices for each time. These times were 10 seconds, 15 seconds, 20 seconds, 25 seconds, and 0 seconds. The petri dishes were introduced to the bacteria from the turkey using an inoculation loop. The petri dishes incubated for four days at 25ºC. The colonies were hand counted. The petri dishes that had been inoculated with turkey that were microwaved for 0 seconds have colony counts of 8, 5, 100, and 163. The 10 second dishes’ counts are 4,2,1, and 1. The 25 second dishes’ counts are 0,0,1,1. The 20 second dishes’ counts are 0, 0, 2, and 1. The 25 second dishes’ counts are 0, 1, 3, and 3. These results show that the shorter times (10 seconds) has more bacterial growth than the longer times (20 seconds, 25 seconds).
Recommended Citation
Nicks, Hailey and Powers, Kathleen, "Effect Of Time In A Microwave On Micrococcus Luteus" (2016). South Carolina Junior Academy of Science. 208.
https://scholarexchange.furman.edu/scjas/2016/all/208
Location
Owens 103
Start Date
4-16-2016 10:00 AM
Effect Of Time In A Microwave On Micrococcus Luteus
Owens 103
This experiment studied the effect of time in a microwave on growth of Micrococcus luteus. Micrococcus luteus was introduced onto pieces of turkey to be microwaved (1350 W). The hypothesis is that the turkey in the microwaved for 0 seconds would have more growth than on the 25 second turkey slices did. These pieces of turkey were cut into congruent circles. The bacterial broth was mixed with two 125 mL bottles of nutrient broth to increase the amount of bacteria that was used. The broths incubated for two days in 25ºC. The slices of turkey were fully submerged in the bacterial broth. The new infected slices of turkey were microwaved for four different times with four slices for each time. These times were 10 seconds, 15 seconds, 20 seconds, 25 seconds, and 0 seconds. The petri dishes were introduced to the bacteria from the turkey using an inoculation loop. The petri dishes incubated for four days at 25ºC. The colonies were hand counted. The petri dishes that had been inoculated with turkey that were microwaved for 0 seconds have colony counts of 8, 5, 100, and 163. The 10 second dishes’ counts are 4,2,1, and 1. The 25 second dishes’ counts are 0,0,1,1. The 20 second dishes’ counts are 0, 0, 2, and 1. The 25 second dishes’ counts are 0, 1, 3, and 3. These results show that the shorter times (10 seconds) has more bacterial growth than the longer times (20 seconds, 25 seconds).
