- the chemical name is Dichloro - Diphenyl - Trichloroethane
- this chemical helped to stop malaria by killing the mosquitoes and insect
DDT that dissolve in fat can become more concentrated as they move up an aquatic food chain, the process called “Bioaccumulation’
DDT was found by chemist called Zeidler in 1874
After DDT has been sell out in the public, it is widely used and most people knew it as a good ting for getting rid of pesticides.
How DDT kill?
- it disrupts the work of cell and affects the plasma membrane
- plasma membrane separates a cell from the inside to its outside, this allows substances to enter and leave the cells —> made of lipid/fats
DDT is fat soluble so it dissolve into plasma membrane. In the same time, opens up the membrane causing the cell to leak.
Potassium ions and sodium ions slip through the membrane.
When the pesticides enters water, algae and bacteria take in the position. SO somehow when DT is sprayed into the water fish will eat it.
Smaller fish are very sensitive to DDT
The food chain are still not totally free of DDT
The pesticides breaks down very slowly in the environment. DDT is still legal in some countries, where it is used in large quantities.
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