Gülsen Tel-Çayan

Dr. Gülsen Tel-Çayan

orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

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

Representative Publications

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17 February 2020 in Journal of Food Measurement and Characterization
Verified
Journal Article
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FÇFatih Çayan
Fatih Çayan
EDEbru Deveci
Ebru Deveci
GTGülsen Tel-Çayan
Gülsen Tel-Çayan
MDMehmet Emin Duru
Mehmet Emin Duru

1 May 2015 in Industrial Crops and Products
Verified
Journal Article
Closed access
AEAbdulselam Ertas
Abdulselam Ertas
MBMehmet Boǧa
Mehmet Boǧa
Mustafa Abdullah YILMAZMustafa Abdullah YILMAZ
Mustafa Abdullah YILMAZ
YYYeter Yesil
Yeter Yesil
GTGülsen Tel-Çayan
Gülsen Tel-Çayan
PUPelin Ugurlu
Pelin Ugurlu

1 January 2018 in International Journal of Food Properties
Verified
Journal Article
Open access
EDEbru Deveci
Ebru Deveci
GTGülsen Tel-Çayan
Gülsen Tel-Çayan
MDMehmet Emin Duru
Mehmet Emin Duru
In this study, the antioxidant, anticholinesterase, and anti-tyrosinase properties of (hexane, acetone, methanol, and water) extracts of Ferula elaeochytris and Sideritis stricta were determined with the total phenolic and flavonoid contents. The phenolic profile of the methanol and water extracts was analysed using HPLC-DAD. Protocatechuic acid was found as the major phenolic compound in the methanol (116.3 ± 3.1 µg/g) and water extracts (69.4 ± 1.3 µg/g) of F. elaeochytris. Coumarins (253.9 ± 4.1 µg/g) and catechin hydrate (175.2 ± 2.9 µg/g) were the most abundant phenolic compounds in the methanol and water extracts of S. stricta. β-carotene–linoleic acid, DPPH•, ABTS•+, CUPRAC, and metal-chelating assays were used to evaluate antioxidant properties of the extracts. The methanol and water extracts of F. elaeochytris and the acetone and methanol extracts of S. stricta containing the highest amount of total phenolic and flavonoid contents showed the highest antioxidant activities in β-carotene–linoleic acid, DPPH•, ABTS•+, and CUPRAC assays. The enzyme inhibitory potential of extracts was investigated against key enzymes involved in neurodegenerative (acetylcholinesterase (AChE) and butyrylcholinesterase (BChE)) and skin (tyrosinase) disorders. In the cholinesterase inhibitory assays, the hexane extracts of two species exhibited the best activity against AChE, while the hexane extract of F. elaeochytris and the methanol extract of S. stricta observed to be the most active against BChE. As for anti-tyrosinase activity results of extracts, the only acetone and methanol extracts showed mild inhibitory activity for both species.

29 July 2011 in Food Analytical Methods
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Journal Article
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GTGülsen Tel-Çayan
Gülsen Tel-Çayan
MAMüjde Apaydın
Müjde Apaydın
MDMehmet E. Duru
Mehmet E. Duru
MOMehmet OZTURK
Mehmet OZTURK

9 December 2014 in Pharmaceutical Biology
Verified
Journal Article
Closed access
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GTGülsen Tel-Çayan
Gülsen Tel-Çayan
MOMehmet OZTURK
Mehmet OZTURK
MDMehmet E. Duru
Mehmet E. Duru
ATAziz Turkoglu
Aziz Turkoglu
Context: Recently, mushrooms are interesting natural products to be investigated due to exhibiting various bioactivities. Objective: This study determines the antioxidant and anticholinesterase activities of various extracts of five wild mushroom species. In addition, the total bioactive contents, namely, ascorbic acid, β-carotene, and lycopene along with phenolic and flavonoid contents were also determined spectrophotometrically. Materials and methods: Antioxidant activity was tested by using five complementary tests; namely, β-carotene-linoleic acid, DPPH• scavenging, ABTS•+ scavenging, cupric-reducing antioxidant capacity (CUPRAC), and metal chelating assays. The in vitro anticholinesterase activity was tested against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) enzymes using the Ellman method. The spectrophotometric methods were used to determine the total phenolic, flavonoid, ascorbic acid, β-carotene, and lycopene contents. Results: The current study has shown that ethyl acetate extracts of Ganoderma lucidum (Curtis) P. Karst (IC50: 1.55 ± 0.05 µg/mL) and Funalia trogii (Berk.) Bondartsev & Singer (IC50: 4.31 ± 0.18 µg/mL) exhibited good lipid peroxidation inhibitory activity. The DPPH, ABTS, and CUPRAC assays supported this activity. The ethyl acetate and methanol extracts of Funalia trogii and Ganoderma lucidum indicated good anticholinesterase activity. Ganoderma lucidum had rich phenolic and flavonoid contents, indicating 98.67 ± 0.32 mg PEs/g extract and 160.38 ± 1.25 mg QEs/g extract, respectively. Discussion and conclusion: The results demonstrate that some of the mushroom species tested herein could be used in food and pharmaceutical industries as natural antioxidants.

1 November 2010 in Food and Chemical Toxicology
Verified
Journal Article
Closed access
GTGülsen Tel-Çayan
Gülsen Tel-Çayan
MOMehmet OZTURK
Mehmet OZTURK
MDMehmet Emin Duru
Mehmet Emin Duru
MHMansur Harmandar
Mansur Harmandar
GTGülaçtı Özge TOPÇU
Gülaçtı Özge TOPÇU