3. SAYFAYA BENZER SAYFALAR
Orıganum vulgare L. subsp. gracıle (C. Koch) Ietswaart'nin uçucu yağ verimi, kompozisyonu ve çay olarak kullanılabilirliğinin araştırılması - Sayfa 8ABSTRACT
Fırat University Graduate School of Natural and Applied Sciences
Department of Biology
2008, Page: VIII+28
In this study, essential oil composition of the Origanum vulgare L. subsp. gracile belonging to Origanum genus have been investigated and the probability of using as herbal tea was olso examined. Plant samples were collected in different vegetation peri...
Origanum vulgare subsp. hirtum ietswaart'un doğal ve kültür formlarından elde edilen uçucu yağlarının kimyasal bileşimleri ve antimikrobiyal aktivite özellikleri - Sayfa 4ABSTRACT
CHEMICAL COMPOSmON AND iN VITRO ANTIMICROBIAL ACTIVITY OF ESSENTIAL OILS OF WILD AND CULTIVATED
ORIGANUM VULGARE SUBSP. HIRTUMIETSWAART Gülden ESEN
Balikesir University, lnstitute of Science, Department of Biology
(M. Sc. Thesis I Supervisor: Assoc. Prof. Dr. Ayşe Dilek AZAZ) Balikesir, 2005
The family Lamiaceae is represented by 45 genera, 546 species and 730 taxa in Turkey. The gen...
Hıyar kök ve kökboğazı çürüklüğü etmeni Fusarium oxysporum F. sp. radicis-cucumerinum' a karşı bitki uçucu yağlarının antifungal etkileri - Sayfa 7II
ANTIFUNGAL ACTIVITIES OF PLANT ESSENTIAL OILS AGAINST CUCUMBER ROOT ROT PATHOGEN Fusarium oxysporum f.sp. radicis
In this study, antifungal activities of the essential oils obtained from different plant species such as white oregano (Origanum onites L.), lavender (Lavandula stoechas subsp. stoechas L.), fennel (Foeniculum vulgare Mill.), laurel (Laurus nobilis ) and myr...
3. SAYFADAKI ANAHTAR KELIMELERwereessentialobtainedoriganumfromoils
3. SAYFA ICERIGI
DETERMINATION OF FUNCTIONAL SPECIFICATIONS AND BIOACTIVE COMPONENTS FOR SOME ORIGANUM SPECIES
Setenay Beril TEKİN
Ankara University Graduate School of Natural and Applied Sciences
Department of Food Engineering
Supervisor: Prof. Dr. Ender Sinan POYRAZOGLU
The genus Origanum is represented in Turkey by 24 species, the ratio of endemism in the genus is 63 %. In this research, essential oils of Origanum vulgare, Origanum onites and Origanum minutiflorum oregano species which are obtained from different sources, have been isolated using the hydrodistillation process and components has been analysed by a GC-MS system. In this study the antioxidant and the antimicrobial properties of essential oil samples were also examined.
The gas chromatography-mass spectrometry analyses revealed that the major components of essential oils for Origanum minutiflorum are carvacrol (% 67.86 -84.95), p-cymen (% 5.36 8.77) and -terpinen (% 0.99 3.46). The major components of essential oil detected from Origanum onites are carvacrol (% 30.01 -71.96), thymol (% 1.53 38.25), p-simen (% 3.90 10.07) and -terpinen (% 2.25 5.07). And examining the essential oil composition of the Origanum vulgare (993) samples harvested in Alanya, it has identified that % 81.35 carvacrol, % 10.17 linalool, % 1.27 p-cymen, % 1.21 thymol and % 1.01 -caryophyllen are the main components.
In this study, the antioxidant activities were investigated by using DPPH (1,1 diphenyl2-picryl-hydrazyl) free radical scavenging activity. EC50 values of the extracts of Origanum species in the study were identified using DPPH method. It was found that these values varied between 0,44 16,21 L and O. onites had the lowest value (0,44 L) while O. vulgare had the highest value (16,21 L).
Also, essentail oils were plated at different concentrations (5, 10, 20, 30, 40, 50, and 80 L/mL) by mixing bacterial cultures and the number of live bacteria were determined . The results revealed that Origanum essential oils exhibited a very strong antibacterial effect on Escherichia coli O157:H7 and reduced the counts of Listeria monocytogenes indeed (P<0.05).
July 2013, 79 pages
Key Words: Essential oil, Origanum vulgare, Origanum onites, Origanum minutiflorum, Antimicrobial activity, Antioxidant activity.