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Chemical analysis and biological activity of the essential oils and extracts of two liverwort species growing in Turkey
Çelik, Gonca; Şahin, Hüseyin; Baltaş, Nimet; Batan, Nevzat; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (University Belgrade, 2023)The aim of this study was to investigate the chemical composition of the essential oils (EOs) from two Diplophyllum species and to evaluate their bioactivity potential [antimicrobial, antioxidant, anti-urease, anti-xanthine ... -
Correlation between phenolic compounds and antioxidant activity of Anzer tea (Thymus praecox Opiz subsp caucasicus var. caucasicus)
Turumtay, Emine Akyaz; İslamoğlu, Fatih; Çavuş, Derya; Şahin, Hüseyin; Turumtay, Halbay; Vanholme, Bartel (Elsevier Science Bv, 2014)Phenolic compounds of Thymus praecox Opiz subsp. caucasicus var. caucasicus were analyzed by high performance liquid chromatography equipped with an ultraviolet detector (HPLC-UV). Quercetin (co-eluting with luteolin) and ... -
Evaluation of antioxidant activity of bee products of different bee races in Turkey
Bee products with high bioactive properties have a very important place in human nutrition. Biochemical properties of these products such as honey, pollen, and propolis vary according to flora, season, bee race, and ... -
Evaluation of phenolic compounds in Tilia rubra Subsp. caucasica by HPLC-UV and HPLC-UV-MS/MS
Akyüz, Emine; Şahin, Hüseyin; İslamoğlu, Fatih; Kolaylı, Sevgi; Sandra, Pat (Taylor & Francis Ltd., 2014)Profile of phenolic compounds of Tilia rubra subsp. caucasica was measured by high performance liquid chromatography coupled with ultraviolet and tandem mass spectroscopy. Three different extraction methods (methonolic, ... -
Synthesis and acetylcholinesterase enzyme inhibition properties of axially disubstituted silicon phthalocyanines and their quaternized derivatives
Bıyıklıoğlu, Zekeriya; Keleş, Turgut; Şahin, Hüseyin (Elsevier, 2022)In this paper, axial 1,3-bis[4-(4-acetylpiperazin-1-yl)phenoxy]propanoxy and {2-[4-(4-acetylpiperazin-1-yl)phenoxy]ethoxy}ethoxy groups substituted silicon(IV) phthalocyanines ( PP-D-Si, PP-OH2-Si) and their quaternized ... -
Three seasonal comprehensive evaluation process of Digitalis trojana Ivan's phenolics
Turumtay, Halbay; Turumtay, Emine Akyüz; Selvi, Emine Kılıçkaya; Şahin, Hüseyin; Sandallı, Cemal; Yazıcı, Zihni Açar (Elsevier Science Bv, 2016)Digitalis trojana Ivan, a member of Digitalis genus, has highly bioactive properties due to, efficient phenolics. These compounds have shown to convert into each other in a limited time. Seasonal fluctuations of this plant ...