Yazar "Topçu, Gülaçtı" için listeleme
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Antioxidant abietane diterpenoids from Salvia barrelieri
Kabouche, Ahmed; Kabouche, Zahia; Öztürk, Mehmet; Kolak, Ufuk; Topçu, Gülaçtı (Elsevier Sci Ltd, 2007)The root extract of endemic Algerian Salvia species Salvia barrelieri Ettling and its diterpenoids were investigated for potential antioxidant activity. From its acetone extract, a new natural abietane diterpenoid ... -
Antioxidant activity of stem and root extracts of Rhubarb (Rheum ribes): An edible medicinal plant
Öztürk, Mehmet; Aydoğmuş-Öztürk, Fatma; Duru, Mehmet Emin; Topçu, Gülaçtı (Elsevier Sci Ltd, 2007)The antioxidant activity of chloroform and methanol extract of roots and stems of Rhubarb (Rheum ribes L.), which are used for medicinal purposes and also its fresh stems and petioles are consumed as vegetable, was studied. ... -
Antioxidant and anticholinesterase active constituents from Micromeria cilicica by radical-scavenging activity-guided fractionation
Öztürk, Mehmet; Kolak, Ufuk; Topçu, Gülaçtı; Öksüz, Sevil; Choudhary, M. Iqbal (Elsevier Sci Ltd, 2011)From the acetone extract of Micromeria cilicica, two new (1 and 2) and five known (3-7) compounds were obtained through radical-scavenging activity guided isolation. Structures of the compounds were identified as piperitone ... -
Antioxidant and Anticholinesterase Activity Evaluation of ent-Kaurane Diterpenoids from Sideritis arguta
Ertaş, Abdülselam; Öztürk, Mehmet; Boğa, Mehmet; Topçu, Gülaçtı (Amer Chemical Soc, 2009)The petroleum ether and acetone extracts of the aerial parts of Sideritis arguta afforded two new and six known diterpenoids with the ent-kaurane skeleton. The structures of the new diterpenoids were determined as ent-7 ... -
Antioxidant and anticholinesterase constituents of Salvia poculata
Kolak, Ufuk; Hacıbekiroğlu, Işıl; Öztürk, Mehmet; Özgökçe, Fevzi; Topçu, Gülaçtı; Ulubelen, Ayhan (Scientific Technical Research Council Turkey-Tubitak, 2009)Two triterpenoids, namely 2 alpha,3 alpha-dihydroxy-24-nor-4(23), 12-oleanadien-28-oic acid (1) and ursolic acid (2); 4. avonoids, namely 5-hydroxy-7,4'-dimethoxyflavone (3), cirsimaritin (4), eupatilin (5), and salvigenin ... -
Antioxidant Diterpenoids from the Roots of Salvia barrelieri
Kolak, Ufuk; Kabouche, Ahmed; Öztürk, Mehmet; Kabouche, Zahia; Topçu, Gülaçtı; Ulubelen, Ayhan (John Wiley & Sons Ltd, 2009)Introduction - The phytochemical and biological studies carried out on Salvia species showed that their extracts and constituents have various biological activities. Objective - The aim of this study was the isolation of ... -
Antioxidant, anticholinesterase and antimicrobial constituents from the essential oil and ethanol extract of Salvia potentillifolia
Kıvrak, İbrahim; Duru, Mehmet Emin; Öztürk, Mehmet; Mercan, Nazime; Harmandar, Mansur; Topçu, Gülaçtı (Elsevier Sci Ltd, 2009)The essential oil of Salvia potentillifolia was analysed by GC and GC-MS. Totally, 123 components were detected in both hydrodistilled and steam-distilled oils, alpha- and beta-pinenes being major compounds. The antioxidant ... -
A new flavone from antioxidant extracts of Pistacia terebinthus
Topçu, Gülaçtı; Ay, Mehmet; Bilici, Ali; Sarıkürkçü, Cengiz; Öztürk, Mehmet; Ulubelen, Ayhan (Elsevier Sci Ltd, 2007)Acetone and methanol extracts of the fruits of Pistacia terebinthus L. subsp. terebinthus L. were studied for their antioxidant activity by investigating their total phenolic and flavonoid contents, P-carotene bleaching ... -
Terpenoids, essential oil composition, fatty acid pro?le, and biological activities of Anatolian Salvia fruticosa Mill.
Topçu, Gülaçtı; Öztürk, Mehmet; Kuşman, Tuğba; Demirkoz, Ayşe Aslı Barla; Kolak, Ufuk; Ulubelen, Ayhan (2013)The hexane and dichloromethane extracts, obtained by re-extraction of the methanol extract of Salvia fruticosa Mill., a?orded 7 diterpenoids (carnosol, carnosic acid, carnosic acid 12-methyl ether, rosmadial, isorosmanol, ...
