Browsing by Author "Topçu, Gülaçtı"

Analysis of the essential oil composition of Sideritis albiflora using direct thermal desorption and headspace GC-MS techniques

Topçu, Gülaçtı; Barla, Aslı; Gören, Ahmet C.; Bilsel, Gökhan; Bilsel, Mine; Tümen, Gülendam (2005)

The main constituents of Sideritis albiflora were found to be trans-caryophyllene, α-pinene, β-pinene, γ-cadinene, pulegone, and caryophyllene oxide by both thermal desorption GC/MS and headspace GC/MS techniques.

Analysis of the essential oil composition of Sideritis albiflora using direct thermal desorption and headspace GC-MS techniques

Topçu, Gülaçtı; Barla, Aslı; Gören, Ahmet C.; Bilsel, Gökhan; Bilsel, Mine; Tümen, Gülendam (Scientific Technical Research Council Turkey-Tubitak, 2005)

The main constituents of Sideritis albiflora were found to be trans-caryophyllene, alpha-pinene, beta-pinene, gamma-cadinene, pulegone, and caryophyllene oxide by both thermal desorption GC/MS and headspace GC/MS techniques.

Bazı Sideritis (Sideritis argyrea, Sideritis dichotoma, Sideritis trojana) türlerinin diterpenik bileşenlerinin izolasyonu ve yapılarının tayini

Gören, Ahmet (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2002)

Bu çalışmada Türkiye'de 35'i endemik olmak üzere 46 türü bulunan Sideritis cinsine ait Sideritis argyrea, S.dichotoma ve S.trojana bitkileri diterpen bileşikleri açısından incelenmiştir. S. argyrea bitkisinin hekzan ve ...

Bioactive constituents of Salvia chrysophylla Stapf

Çulhaoğlu, Burcu; Yapar, Gönül; Dirmenci, Tuncay; Topçu, Gülaçtı (Taylor & Francis Ltd, 2013)

The dichloromethane extract of the aerial parts of Salvia chrysophylla Stapf (Lamiaceae), which is an endemic species to south-western Anatolia, was studied for non-volatile secondary metabolites for the first time in this ...

Bioactive Turkish plant extracts and their constituents

Tümen, Gülendam; Kılıç, Turgut; Gören, Ahmet C.; Barla, Ash; Topçu, Gülaçtı; Türkmen, Zeynep; Kingston, David G. I. (Springer, 2009)

Over 200 plant extracts were prepared from different family plants of rich flora of Turkey, in a frame of international collaborative project "Bioactive Turkish Plant Constituents". The plants were chosen randomly and/or ...

Chemical constituents of two endemic sideritis species from Turkey with antioxidant activity

Çarıkçı, Sema; Kılıç, Turgut; Azizoğlu, Akın; Topçu, Gülaçtı (Acg Publications, 2012)

In this study, two Sideritis species, endemic to Turkey, S. niveotomentosa Huber - Morathii, S. brevidens P. H. Davis have been studied for their diterpenic compounds and the antioxidant properties. Eight known diterpenoids, ...

Chemical profile of the Anatolian Sideritis species with bioactivity studies

Çarıkçı, Sema; Kılıç, Turgut; Gören, Ahmet C.; Dirmenci, Tuncay; Toraman, Gülbahar Özge Alim; Topçu, Gülaçtı (Taylor & Francis Ltd, 2023)

Context: The genus Sideritis L. (Lamiaceae) is represented by 46 species in Turkey with an 79% endemism ratio, 42 of 46 belonging to the section Empodoclia. Objective: In this review article, Sideritis species growing ...

Composition of the essential oil of Satureja metastasiantha: a new species for the flora of Turkey

Çarıkçı, Sema; Gören, Ahmet Ceyhan; Dirmenci, Tuncay; Yalçınkaya, Burhanettin; Erküçük, Ayşen; Topçu, Gülaçtı (Walter De Gruyter GMBH, 2020)

The aerial parts of Satureja metastasiantha were hydrodistilled for 3 h using a Clevenger-type apparatus. The essential oils were analyzed by gas chromatography/flame ionization detector and gas chromatography/mass ...

Determination of volatile organic compounds in fourty five salvia species by thermal desorption-gc-ms technique

Hatipoğlu, Seda Damla; Zorlu, Nihal; Dirmenci, Tuncay; Gören, Ahmet C; Öztürk, Turan; Topçu, Gülaçtı (Acg Publications, 2016)

Volatile organic compounds (VOC) from dried aerial parts (flowers, leafs, leafy branches and stems) of fourty five Salvia species, harvested from different regions of Turkey, were determined using thermal desorption technique ...

Diterpenes from Sideritis argyrea

Topçu, Gülaçtı; Gören, Ahmet C.; Kılıç, Turgut; Yıldız, Yaşar Kemal; Tümen, Gülendam (Elsevier Science Bv, 2001)

The known ent-kaurene diterpenes 1-9 and a new ent-labdane, ent-6 beta ,8 alpha -dihydroxyl-abda-13(16),14-diene (10), were isolated from the whole plant of Sideritis argyrea. Their structures were elucidated based on one- ...

Diterpenes from Sideritis sipylea and S-dichotoma

Topçu, Gülaçtı; Gören, Ahmet C.; Kılıç, Turgut; Yıldız, Yaşar; Tümen, Gülendam (Scientific Technical Research Council Turkey-Tubitak, 2002)

Two Sideritis species afforded eleven kaurene and one beyerene diterpenes. Structures of the compounds from Sidcritis sipylca were elucidated as linearol (1), 7-epicandicandiol (2), sideridiol (3), siderol (4), isolinearol ...

Diterpenes from Sideritis trojana

Topçu, Gülaçtı; Gören, Ahmet C.; Kılıç, Turgut; Yıldız, Yaşar; Tümen, Gülendam (Taylor & Francis Ltd, 2002)

Six known ent-kaurene, a new ent-kaurane and a new pimarane diterpenes were isolated from Sideritis trojana. The structures of new compounds were determined as ent-7alpha-15beta,16beta-epoxykaurane (1), and ent-2alpha-hy ...

Ent-kaurane diterpenoids isolated from Sideritis congesta

Topçu, Gülaçtı; Ertaş, Abdulselam; Öztürk, Mehmet; Dinçel, Demet; Kılıç, Turgut; Halfon, Belkıs (Elsevier Science Bv, 2011)

A new ent-kaurane diterpenoid, together with eight known ent-kauranes, were isolated from the petroleum ether and acetone extracts of the whole plant of Sideritis congesta P. H. Davis & Hub.-Mor. and their structures were ...

Ent-kaurene diterpenes from Sideritis athoa

Topçu, Gülaçtı; Gören, Ahmet Ceyhan; Yıldız, Yaşar Kemal; Tümen, Gülendam (Harwood Acad Publ Gmbh, 1999)

Two new and six known ent-kaurene diterpenes were isolated from the whole plant of Sideritis athoa and their structures were elucidated as ent-3 alpha,18-dihydroxykaur-16-ene (1), athonolone (2), ent-3 beta-hydroxykaur-16-ene ...

Ent-kaurene diterpenoids from sideritis lycia with antiviral and cytotoxic activities

Kılıç, Turgut; Topçu, Gülaçtı; Gören, Ahmet Ceyhan; Aydoǧmuş, Zeynep; Karagöz, Ali; Yıldız, Yaşar K.; Aslan, İrfan (ACG Publications, 2020)

The genus Sideritis (Lamiaceae) is represented by 45 species (54 taxa) in Anatolia with high endemism ratio (74%), and Turkey is one of the gene centers of the genus along with Spain. Acetone extract of the aerial parts ...

Identification of cytotoxic sesquiterpenes from Laurus nobilis L.

Barla, Aslı; Topçu, Gülaçtı; Öksüz, Sevil; Tümen, Gülendam; Kingston, David G. I. (Elsevier Sci Ltd, 2007)

A new sesquiterpene, lauroxepine and six known sesquiterpene lactones, were obtained through bioactivity-directed isolation from a methanol extract of the fruits of Laurus nobilis. The hexane-soluble part of the methanol ...

A novel isopimarane diterpenoid with acetylcholinesterase inhibitory activity from Nepeta sorgerae, an endemic species to the Nemrut Mountain

Yılmaz, Anıl; Çağlar, Pınar; Dirmenci, Tuncay; Gören, Nezhun; Topçu, Gülaçtı (Natural Products Inc, 2012)

From the dichloromethane extract of Nepeta sorgerae, the isolation and structure elucidation are now reported of a new isopimarane diterpenoid, named sorgerolone, and two known triterpenoids, oleanolic acid and ursolic ...