Helichrysum plicatum DC. ve Phlomis pungens L. bitkilerinin antioksidan aktivitelerinin mukayesesi

---

Thesis Type: Postgraduate

Institution Of The Thesis: Erzincan Binali Yildirim University, Fen-Edebiyat Fakültesi, Kimya Bölümü, Turkey

Approval Date: 2012

Thesis Language: Turkish

Student: MESUT IŞIK

Supervisor: Ekrem Köksal

Open Archive Collection: AVESIS Open Access Collection

Abstract:

This study is aimed to examine the antioxidant activities of Helichrysum plicatum and Phlomis pungens plants. For this purpose, plants were collected from Çilhorozu and Sarıgüney which is the village of Çayırlı, a town of Erzincan province, and they were dried and ethanol extractions were prepared. On prepared ethanol extraction total antioxidant activity was determined by ferroccyanate reduction method; Cu2+ and potassium ferric thiocyanate were determined by Cuprac method; was determined by reduction method capacity of Fe3+ ions; the activitiy of scavenging of 1,1-diphenyl-2-picryl-hydrazyl (DPPH) was determined; the total amount of the compounds of phenolic and flavonoid was determined. It was observed that 30 µg mL-1 concentrated of ethanol extracts obtained from Helichrysum plicatum and Phlomis pungens plants inhibited the lipid peroxidation of linoleic acid emulsion as 77,4 % and 70,2% respectively. In the same concentration, ?-tokoferol and trolox caused inhibitions of 85,3 % and 83,1 %, respectively. Helichrysum plicatum plant in which it was detected that the content of total phenolic and flavonoid were much more than those in Phlomis pungens plant still displayed higher DPPH scavenging activity. Butylated hydroxy toluen(BHT), ?-tocopherol and an analoge of its which is the solved in water, namely Trolox were used as reference antioxidant compounds, while the antioxidant activity of Helichrysum plicatum and Phlomis pungens plants whose ethanol extractions were taken out were being examined.2012, 61 pagesKeywords: Helichrysum plicatum, Phlomis pungens, Antioxidant activity, Metal reduction.