Fatih Gül

Dr. Fatih Gül

orcid

Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 July 2015 in Journal of Food Biochemistry
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RERamazan Erenler
Ramazan Erenler
ITIsa Telci
Isa Telci
MUMusa Ulutas
Musa Ulutas
ibrahim demirtasibrahim demirtas
ibrahim demirtas
FGFatih Gül
Fatih Gül
OKOmer Kayir
Omer Kayir
Doi:10.1111/jfbc.12168 Echinacea is valuable for its pharmaceutical, medicinal and agricultural properties. Flowers and leaves of Echinacea purpurea (L.) Moench and Echinacea pallida (Nutt.) Nutt. were extracted with methanol, filtered, and solvents were removed by rotary evaporator to get four separate extracts. The flowers and leaves of both plants were boiled in water then extracted with ethyl acetate to achieve another four extracts. Quantifications of chemical constituents of extracts were deter-mined by TOF-LC/MS. The main compound of methanol extracts of E. purpurea and E. pallida leaves and flowers was cichoric acid. Caffeic acid was the chief com-pound of water extracts of both plant leaves and flowers. The antioxidant activi-ties including DPPH free radical scavenging, ABTS cation radical scavenging and reducing power were assayed and structure–activity relationships were postulated. Water extracts of both Echinaceae species of flowers and leaves revealed excellent antioxidant activities. PRACTICAL APPLICATIONS Echinacea, which is a medicinal and aromatic plant, has been used for traditional medicine in many countries. The water extract of Echinacea purpurea (L.) Moench and Echinacea pallida (Nutt.) Nutt. exhibited excellent antioxidant activities; therefore, these Echinacea species can be used as natural agents in food and phar-maceutical industries

1 March 2021 in Industrial Crops and Products
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MKMuhittin Kulak
Muhittin Kulak
JJJesús V. Jorrín-Novo
Jesús V. Jorrín-Novo
MRMaria Cristina Romero-Rodriguez
Maria Cristina Romero-Rodriguez
EYEmel Diraz Yildirim
Emel Diraz Yildirim
FGFatih Gül
Fatih Gül
SKSengul Karaman
Sengul Karaman

1 November 2013 in Combinatorial Chemistry & High Throughput Screening
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GAGokhan Abay
Gokhan Abay
MAMuhammed Altun
Muhammed Altun
OKOmer Cem Karakoc
Omer Cem Karakoc
FGFatih Gül
Fatih Gül
ibrahim demirtasibrahim demirtas
ibrahim demirtas
The composition of fatty acids and insecticidal effects was performed for the Turkish mosses Dicranum scoparium, Hypnum cupressiforme, Polytrichastrum formosum, Homalothecium lutescens and the Turkish liverwort Conocephalum conicum. All structures were determined by means of gas chromatography and gas chromatography-mass spectrometry techniques. The determination of fatty acids was done using a simple and mild method that utilized different solvent extractions ranging from nonpolar to polar solvents (hexane, dichloromethane, chloroform, ethyl acetate and methanol, respectively), and the samples were powdered with and without liquid nitrogen. The correlations between the saturated and unsaturated fatty acid contents depending on the solvent polarity and their crushing process by liquid nitrogen were observed. The insecticidal activity of the bryophytes was analyzed by using the methanol, hexane and esterified methanol extracts. The hexane extracts of Polytrichastrum formosum showed the highest insecticidal activity (70.33%) against Sitophilus granarius. Contact toxicity activities of lauric, myristic and palmitic acids besides single dose studies of the solvent extracts were carried out. The highest mortality rate (53.34%) was obtained from the myristic acid among the tested pure fatty acids. The activities of palmitic and lauric acids were 17.75% and 4.32%, respectively.

24 August 2023 in Journal of Biomolecular Structure and Dynamics
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YBYunus Başar
Yunus Başar
SYSemiha Yenigun
Semiha Yenigun
YİYaşar İpek
Yaşar İpek
LBLütfi Behçet
Lütfi Behçet
FGFatih Gül
Fatih Gül
ibrahim demirtasibrahim demirtas
ibrahim demirtas
1,5,9-epideoxyloganic acid (ELA) was isolated from the aerial parts of endemic Nepeta aristata Boiss Et Kotschy Ex Boiss crude extract (methanol:chloroform) using silica gel (hexane, chloroform, ethyl acetate, and methanol) and sephadex LH-20 (65% methanol-35% chloroform) columns. Activity-guided isolation was performed on methanol sub-fractions with DNA protection and enzyme inhibitory activities, and then the ELA was purified by prep-HPLC. The ELA structure, bio-guided isolate, was determined via 1H NMR, 13C NMR, and MS spectrometry. ELA's enzyme inhibition and DNA protection activities were investigated and compared with standard drugs. The inhibition capacity of ELA against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), urease, carbonic anhydrase (CA), α-glucosidase, α-amylase, lipase, and tyrosinase enzymes was evaluated by kinetic and molecular docking results. The ELA displayed the best inhibitory activity on AChE, BChE, α-glucosidase, urease, α-amylase, and tyrosinase with IC50 values of 2.53 ± 0.27, 3.75 ± 0.11, 3.98 ± 0.07, 4.40 ± 0.01, 6.43 ± 0.54 and 7.39 ± 0.00 µg/mL, respectively. ELA acted as a competitive inhibitor against BChE and α-glucosidase and a non-competitive inhibitor against AChE. The ELA's binding affinity values on AChE, BChE, and α-glucosidase were -7.70, -8.50, and -8.30 kcal/mol, respectively. DNA protection activity of the ELA molecule was determined as 57.53% for form I and 53.57% for form II. In conclusion, the inhibitory activity of ELA demonstrated its effectiveness in terms of its suitability in the pharmaceutical industry.Communicated by Ramaswamy H. Sarma.

6 December 2018 in TURKISH JOURNAL OF CHEMISTRY
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RERamazan Erenler
Ramazan Erenler
ITİsA Telci̇
İsA Telci̇
MEMahfuz Elmastaş
Mahfuz Elmastaş
HAHüseyin Aksi̇t
Hüseyin Aksi̇t
FGFatih Gül
Fatih Gül
ÖKÖmer Kayir
Ömer Kayir

1 March 2016 in Zeitschrift für Naturforschung C
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RERamazan Erenler
Ramazan Erenler
KPKoksal Pabuccu
Koksal Pabuccu
AYAyse Sahin Yaglioglu
Ayse Sahin Yaglioglu
ibrahim demirtasibrahim demirtas
ibrahim demirtas
FGFatih Gül
Fatih Gül
In this study, the effect of Mougeotia nummuloides and Spirulina major on Vero cells (African green monkey kidney), C6 cells (rat brain tumor cells) and HeLa cells (human uterus carcinoma) was investigated in vitro. The antiproliferative effect of the methanol extract of M. nummuloides and S. major compared with 5-fluorourasil (5-FU) and cisplatin was tested at various concentrations using the BrdU Cell Proliferation ELISA. Both M. nummuloides and S. major extracts significantly inhibited the proliferation of Vero, HeLa and C6 cancer cell lines with IC50 and IC75 values. The M. nummuloides extract exhibited higher activity than 5-FU and cisplatin on Vero and C6 cells at high concentrations. The S. major extract revealed better antifproliferative activity than standards against Vero cells at 500 μg/mL. The compounds of methanol extracts were determined by GC-MS after the silylation process. Trehalose, monostearin and 1-monopalmitin were detected as major products in the M. nummuloides extract where as in the S. major extract; monostearin, 1-monopalmitin and hexyl alcohol were the main constituents.