https://padlet.com/pingchuwang2/l3o9hph57bjspoi5 Investigating the effects of different types of disinfectants on inhibiting the growth of bacteria en-us 2020-05-21 04:29:38 UTC 2026-02-20 23:53:09 UTC hello@padlet.com pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586277288 - Bacteria is a unicellular organism. Unlike plants and animal cells, bacterial cells do not have membrane enclosed nucleus, instead they have a Nucleoid region 
- Bacteria reproduce through binary fission - duplicate so offsprings are clones of parents]]> 2020-05-21 04:30:37 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586277288 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586277758 - There are many bacteria in human body 
- For example, they help breakdown the food we eat, make nutrients available to us and neutralize toxins]]> 2020-05-21 04:31:09 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586277758 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586278319 - Some are pathogens --> Causes diseases and infections 
- They are able to reproduce quickly through Binary Fission --> Duplicate every time ]]> 2020-05-21 04:31:40 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586278319 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586278816 Due to recent pandemic, many disinfectant products have been out of stock in the supermarket including --> hand santizer, dettol body wash, wet wipes etc

I want to investigate to find out which ones are actually the most effective against killing bacteria 

- Types of brands of body wash on inhibiting bacterial growth?? Dettol --> "Kills 99.9% of bacteria" and was sold out completely ]]> 2020-05-21 04:32:20 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586278816 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279233 2020-05-21 04:32:56 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279233 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279461 1) Zone of inhibition 
Grow petri dish of bacterias 
- Put a filter paper disk infused in disinfectant into the middle of petri dish 
- The disinfectant will spread through the agar through diffusion from high concentration to low concentration 
- Areas where disinfectants worked will be clear as no bacteria will grow near the disinfectant--> A circle will form around the disinfectant
- Measure the area of circle to find the zone of inhibition --> Use a clear ruler to measure from the centre of disinfectant disk to the edge of area with no growth to get the radius of circle 
- The larger the zone of inhibition, the more sensitive the bacteria is to that disinfectant and the smaller the zone of inhibition, the less sensitive the bacteria is to that disinfectant
- Compare the area of zone of inhibition of different disinfectants 


]]> 2020-05-21 04:33:16 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279461 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279895 Using a calorimeter 
- As the number of bacterial cells increase, the % of transmission will decrease ]]> 2020-05-21 04:33:51 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586279895 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586281123 2020-05-21 04:35:39 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/586281123 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599287225 - Lactobacillus is one of the most common bacteria classified as a probiotic 
- "Probiotic" promotes the growth of 'good' bacteria through fermented food e.g yoghurt 
- Most yoghurts contain probiotics ]]> 2020-05-28 14:37:01 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599287225 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599287637 - Disinfectants destroy the cell wall of bacteria and interfere with their metabolism 
- ]]> 2020-05-28 14:37:10 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599287637 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599292441 - Bacteria is transmitted the same way as viruses 
- This is through air for example a person with the infection could spread it through coughing and sneezing
- It can also be spread through contact, by touching or shaking hands with an infected person  ]]> 2020-05-28 14:39:06 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599292441 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599302380 2020-05-28 14:43:12 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599302380 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599318712 - Many yoghurts contain different types of bacteria and not just one for example, they contain L. Acidophilus but also a lot of other bacteria. 
- Will this affect the fairness of my results? Can I grow many different bacterias? ]]> 2020-05-28 14:49:27 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599318712 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599325504 2020-05-28 14:52:03 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599325504 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599329730 2020-05-28 14:53:41 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/599329730 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/600494772 - Bacterias are prokaryotes 
- It is a single cell organism and it lacks a nucleus  ]]> 2020-05-29 05:05:38 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/600494772 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593451 2020-06-18 05:30:22 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593451 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593664 2020-06-18 05:30:38 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593664 pingchuwang2 https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593805 2020-06-18 05:30:46 UTC https://padlet.com/pingchuwang2/l3o9hph57bjspoi5/wish/631593805