Abstract
The impacts of Ultraviolet (UV) radiation on the human body have received increased attention in previous years. The impacts are comprised of a series of illnesses, burns, and modifications in the genetic structures. Therefore, the current study aimed to identify the effect of sunscreens on yeast to prevent ultraviolet damage. The study uses two sunscreens with different sun protection factors to show how they differently protect the cells from the wrath of UV light. The experiment involves the use of yeast as the test organism since yeast has DNA that is used for reproduction by budding. UV light affects the growth of the bacteria and the limiting factor with the sunscreens. Six Petri dishes with agar were inoculated with yeast solution and put under different conditions and the growth results will be obtained. The experiment also showed how different clothes protect human from the UV radiations.
Highlights
The sun emits long wavelength radiation in form of visible and invisible light
Materials needed for the experiment are the normal baker’s yeast, sugar, nylon cloth, polyester cloth, warm water, and six petri dishes with agar, incubator set at 30 degrees Celsius, pipette, two sunscreens with SPF15, and 50, respectively
This is what we expected from the results since the Petri dish after inoculation was not exposed to sunlight and the yeast cells were not killed and were capable to grow in large numbers
Summary
The sun emits long wavelength radiation in form of visible and invisible light. The invisible light houses the ultra violet light which can be classified in three types: UVA, UVB and UVC. UVA is not absorbed by the ozone layer and it directly comes to the troposphere; it penetrates on the skin cells causing premature aging of the skin and affects the immunity. UVD is absorbed partially by ozone its responsible of DNA damage which leads to squamous cell carcinoma as well cell as cell apoptosis evidenced by the peeling of the skin after UV exposure. UVC is completely absorbed by the ozone layer. The negative impacts of these radiations can be minimised by using sun-
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