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Öğe Chemical composition, antimicrobial and antioxidant properties of Thymus eigii M. Zohary & P. H. Davis essential oil(2010) Azaz A.D.; Kucukbay Z.; Celen S.; Kuyumcu E.; Yildiz B.The family Lamiaceae is represented by 45 genera, 546 species and 730 taxa in Turkey. The genus Thymus is represented in Turkey by 38 species; the ratio of endemism in the genus is 53%. Thymus eigii samples collected from Hatay were subjected to hydrodistillation to yield essential oils that were subsequently analysed by Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS). The main constituents of the oils were identified and antimicrobial and antioxidant bioassays were applied. The T.eigii white flowers oil contained carvacrol (43.63%), p-cymene (20.55 %) and thymol (16.06%); T.eiigi with purple flowers oil contained geranyl acetate (15.66 %), p-cymene (14.62%) and thymol (11.48%) as the main components. All tested microorganisms were inhibited by the essential oil samples. Antioxidant activity was tested using the 2,2-diphenyl-l-picrylhydrazyl (DPPH) radical-scavenging method. The antioxidant activity of the tested essential oils were slightly lower than butylated hydroxyanisole (BHA) and so the essential oils can be considered effective natural antioxidants. © Essential Oil Resource Consultants. All rights reserved.Öğe Composition and the in vitro antimicrobial activities of the essential oils of Achillea wilhelmsii C. Koch. and Achillea lycaonica Boiss & Heldr.(Chemical Publishing Co., 2008) Azaz A.D.; Arabaci T.; Sangun M.K.; Yildiz B.The genus Achillea (Asteraceae) is represented by 42 species (48 taxa) in Turkey and 22 of which are endemic to Turkey. Achillea wilhelmsii and Achillea lycaonica collected from different localities in Turkey, were subjected to hydrodistillation to yield essential oils which were subsequently analyzed by GC and GC/MS. The main constituents of the oils were identified and antimicrobial bioassays were applied. Camphor (39.62 %) was the main component in the oil of Achillea wilhelmsii. The oil of Achillea lycaonica contained L-camphor (43.19 %) as main constituent. All tested microorganisms were inhibited by the essential oils. On the other hand both essential oils showed strong antifungal activity against Alternaria brassicola than other tested microfungi.Öğe Composition of the essential oil of nepeta trachonitica post from Turkey(1999) Tümen G.; Baser K.H.C.; Kürkçüoglu M.; Demirci B.; Yildiz B.Water-distilled essential oil from the aerial parts of Nepeta trachonitica was analyzed by GC/MS. Sixty seven components were characterized representing 86.7% of the total components detected with spathulenol (22.2%) as the major constituent. © 1999, Taylor & Francis Group, LLC. All rights reserved.Öğe Contribution to the flora of Malatya I: A preliminary study at the vicinity of Sürgü-Çelikhan(1996) Yildiz B.; Aktoklu E.This study includes vascular plant species and the floristic properties of Sürgü-Çelikhan vicinity. From this area, 950 plant specimens have been collected between 1988-1990. At the end of study 66 families, 270 genera and 561 species (586 taxa) has been established. All of the species belong to Angiospermae except for Equisetum palustre L. (Sphenophyta) and Juniperus oxycedrus L. (Gymnospermae). The families which have highest species number are Fabaceae (67), Asteraceae (63) and Brassicaceae (49). According to the phytogeographical region, distribution of species as follows: Irano-Turanians 195 (34.8 %), Mediterraneans 75 (10.2 %), Euro-Siberians 25 (4.5 %). 73 species (13.0 %) are endemic to Turkey. As a result of study we may point and that populations of many species in the area decreased rapidly due to the aridity, over grazing and severe erosion.Öğe Floristic characteristics of Beyda?i (Malatya)(2004) Yildiz B.; Bahçecio?lu Z.; Arabaci T.The floristic characteristics of Beyda?i are given and the vascular plant species growing there are documented. Beyda?i is situated in the south of Malatya province and is in the Irano-Turanian phytogeographical region. The research was carried out between 1986 and 2000. Two thousand one hundred plant specimens were collected from the area. At the end of the study, 873 vascular plant species (897 taxa, 185 subsp., 112 var.) and 357 genera belonging to 73 families were identified: 140 taxa (16.9%) are endemic to Turkey. The phytogeographic elements are represented in the study area as follows: Irano-Turanian 364 (40.44%), Mediterranean 98 (11.1%), and Euro-Siberian 32 (3.7%). Finally, 101 new records were established for the B7 square.Öğe Floristic characteristics of Köse Da?i (Sivas)(1996) Yildiz B.The floristics characteristics of Köse mountain are given and the vascular plant species growing there have been documented. Köse mountain is situated northeast of Sivas and close to the northern parts of the Anatolian Diagonal. It is in the transitional zone of the Euro-Siberian and Irano-Turanian phytogeographical regions. In the vegetarian period, a total of 3500 plant specimens were collected from the are between 1984 and 1987. At the end of the study, 1137 vascular plant species were identified, belonging to 85 families and 419 genera. Of these, 165 species are endemic to Turkey. The phytogeographic elementss are represented in the study area as follows: Irano-Turanian 305, Euro-Siberian 163, Mediterranian 55. One species is new for the Flora of Turkey.Öğe Rediscovery of Achillea boissieri Hausskn. ex Boiss. later 140 years(2006) Arabaci T.; Yildiz B.This study includes taxonomical improvements of Achillea boissieri HAUSSKN. ex BOISS. and distributions in Turkey which was known only from the type specimen and regarded as a synonym in relevant studies. After collected second times from the field, A. boissieri decided as a separate species. Furthermore, description, localities, distribution map and key of allied species are given. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.Öğe Taxonomy and treatened categories of three Achillea L. (Asteraceae-Anthemideae) species previously cited in the data deficient (DD) category(2008) Arabaci T.; Yildiz B.This study presents the taxonomy and threatened categories of 3 Achillea L. (Asteraceae-Anthemideae) species: A. membranacea (Labill.) DC., A. brachyphylla Boiss. & Hausskn., and A. boissieri Hausskn. ex Boiss. These species belong to sect. Babounya (DC.) O.Hoffm. and were previously placed in the data deficient (DD) category in the Red Data Book of Turkish Plants. Descriptions, localities, distribution map, and images of the species are given. Threatened categories of the species were determined as A. membranacea in VU, and A. brachyphylla and A. boissieri in EN. © TÜBİTAK.
