Bağdatlı, İrem (2014) Effect of harvesting time of Salvia Absconditiflora on the antioxidant activity of it. Other thesis, TED ANKARA KOLEJİ.
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Abstract
The aim of the experiment was to investigate if there is a relation between the antioxidant activity of the S. Absconditiflora and the harvesting months of S. Absconditiflora (April, May, June and November) by looking the radical scavenging activity with the DPPH method. My research question was: “How does the antioxidant activity of Salvia Absconditiflora that is cultivated in different months (April, May, June and November) change as indicated by the DPPH method in which the free radical scavenging activity is detected?” It was hypothesized that the antioxidant activity of S. Absconditiflora changes as it is harvested in different months (April, May, June and November). It is expected that the antioxidant activity in April and May will be the strongest as they are the spring months and the antioxidant activity in November will be the lowest as it is the fall month. In order to test the hypothesis and to answer the research question, the DPPH method used to determine the DPPH radical scavenging activity of S. Absconditiflora solutions. The salvia extract, DPPH solution and S. Absconditiflora extracts’ solutions for the DPPH measurements were prepared. Radical scavenging activity were found for all solutions of both S. Absconditiflora and quercetin. The results were found by using the formula taking quercetin as a standard & control and percentage radical scavenging activity was calculated. According to data, the percentage radical scavenging activities of S. Absconditiflora cultivated in different months were compared. As the vitamin and carotene amounts differ due to flowering, the antioxidant activity showed difference. S. Absconditiflora cultivated in November showed the least antioxidant effect as the mean value is 84.71, followed by S. Absconditiflora in April as the mean value is 87.88 . S. Absconditiflora in June and S. Absconditiflora in May showed the strongest antioxidant activities. June has the mean value 86.65 and May has the mean value 84.30. The p value is smaller than 0.05 and if the p value from anova is smaller than 0.05 so it is found that there is a significant mean difference between the antioxidant activity and harvesting time. With the help of experiment it is found that S. Absconditiflora is affected by the harvesting months. This study shows the importance of harvesting time on the antioxidant activity of S. Absconditiflora.
| Item Type: | Thesis (Other) |
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| Additional Information: | Supervisor: Demet İZGÜ, IB Notu: C |
| Uncontrolled Keywords: | Salvia Absconditiflora, antioxidant activity |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Depositing User: | Kamil Çömlekçi |
| Date Deposited: | 12 Sep 2014 06:41 |
| Last Modified: | 12 Sep 2014 06:41 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/525 |
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