Çelik, Merve (2011) The Investigation of the Effect of the Infusion Time on Antioxidant Effect of Rosa canina Tea. Other thesis, TED ANKARA COLLEGE FOUNDATION HIGH SCHOOL.
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Abstract
Plant tea are consumed in society in order to have natural antioxidant. As the free radicals in our body attack and harm our body, the antioxidants react with free radicals and scravenge them. They decrease the negative effect of free radicals to our body. The idea of all tea having antioxidant effect is known by literature but there is not an exact literal information about the factors affecting the antioxidant activity of tea. The focus of this study is the effect of infusion time on antioxidant effect of tea. It is impossible to test all tea kinds that the infusion time has an effect on antioxidant activity, so Rosa canina is chosen. So the aim of this study is to investigate whether infusion time has an effect on the antioxidant activity of Rosa canina by measuring its light absorbance value, after mixed with a free radical source called DPPH, in spectrophotometer. In the experiment different infused timed Rosa canina tea were prepared by same volumed hot water and same mass of tea. The tea extracts were mixed with a free radical source called DPPH and the change in the absorbance of the light of the mixtures were observed. As the antioxidant effect of the tea increases, the light absorbance value of the tea and DPPH mixture in spectrophotometer decreases. In this investigation it was found that the infusion time has an effect on the antioxidant effect of Rosa canina. The maximum antioxidant effect is observed in 6 minutes infused tea. On the other hand the minimum antioxidant effect is observed in 60 minutes infused tea. Overall, the results of this study justifies the hypothesis that time of infusion affects the antioxidant activity of Rosa canina but there can not be seen a direct relation between time of infusion and antioxidant activity.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | Supervisor: Didem OLUKLULU IB Notu: B |
| Uncontrolled Keywords: | Antioxidant Effect, Rosa canina, biology |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Depositing User: | Kamil Çömlekçi |
| Date Deposited: | 22 Jun 2011 06:37 |
| Last Modified: | 12 Apr 2019 10:56 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/156 |
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