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Core practicalWhy do they put mint in toothpaste? Would garlic be better?)

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Core practical Why do they put mint in toothpaste? Would garlic be better? Introduction:- Plants are susceptible to infection by bacteria and fungi; they do every thing to repel such attacks. we know that several plants can destroy or inhibit the growth of certain bacteria. These plants are known as antibacterial. Chemicals in antibacterial plant cells are toxic to bacteria or interfere with their metabolism in some other way. Aim of experiment:- To investigate the antibacterial properties of plant. Hypothesis:- The hypothesis given is that garlic will have higher antibacterial properties than mint. Method Apparatus:- * Agar plate seeded with bacteria * Plant material(garlic cloves and mint leaves) * Pestle and mortar * 10 cm3 industrial methylated spirits * pipette(sterile) ...read more.


* Place the plates in to an incubator and leave for 24 hours at 25oC. Safety issues:- * Methanol is toxic and flammable keep away from skin and sprit burner. * Wear lab coat, goggle to prevent bacteria getting on skin and clothes. * Do not open Petri dishes containing growing micro organisms they can spread out. * Do not throw the plates in the bin as they contain harmful bacteria they will need to be autoclaved Results:- The result proven the given hypothesises that garlic has a higher antibacterial properties than mint. It is for reason that no bacteria spread over the garlic in any Petri dishes but there was bacteria over the mint and water. ...read more.


Evaluation:- It was found that garlic has more antibacterial properties than mint and control substance as water. no bacteria found in garlic and it has a toxic effect than mint and water. As mint is not antibacterial we can use Triclosatic in toothpaste by not using mint as it can not kill the bacteria and garlic as it has toxic chemical and do not provide freshness. Summary:- The result appeared to be accurate and proven the given hypothesis. As plants are susceptible to infection by bacteria and fungi. as garlic has higher antibacterial property than water(control)and mint. And it can kill the bacteria as it has toxic effect and do not provide freshness to the mouth that's why they put mint in toothpaste. Reference:- Salter -Nuffield Advanced Biology, Activity 4.7. ...read more.

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