The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts

Mehmet Erşatır

doi:10.29233/sdufeffd.1735537

The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts

Abstract

The green husks of the walnut (Juglans regia L.), which is of industrial importance and cultivated in our country, were collected from the Hakkari province and extracted using subcritical water and supercritical carbon dioxide methods. The effects of different extraction methods under various temperature and pressure conditions on the chemical composition of the husks was examined using the obtained GC-MS (Gas Chromatography-Mass Spectrometry) analysis results. The content of the walnut husks extracts was classified into tetralones, hydrocarbons, fatty acid esters and naphthoquinones. Furthermore, the antioxidant activities of the extracts were analyzed using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The amount of tetralones in the extracts directly affected the DPPH antioxidant activity results.

Keywords

Ethical Statement

As the author of this study, I declare that I do not have any ethics committee approval and/or informed consent statement.

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Details

Primary Language

English

Subjects

Separation Science, Natural Products and Bioactive Compounds

Journal Section

Research Article

Authors

Mehmet Erşatır ^*
0000-0003-1077-0626
Türkiye

Publication Date

May 28, 2026

Submission Date

July 5, 2025

Acceptance Date

December 9, 2025

Published in Issue

Year 2026 Volume: 21 Number: 1

DOI

https://doi.org/10.29233/sdufeffd.1735537

IZ

https://izlik.org/JA53JL97RA

Cite

RIS / Bibtex

APA

Erşatır, M. (2026). The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts. Süleyman Demirel University Faculty of Arts and Science Journal of Science, 21(1), 19-31. https://doi.org/10.29233/sdufeffd.1735537

AMA

1.Erşatır M. The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts. Süleyman Demirel University Faculty of Arts and Science Journal of Science. 2026;21(1):19-31. doi:10.29233/sdufeffd.1735537

Chicago

Erşatır, Mehmet. 2026. “The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts”. Süleyman Demirel University Faculty of Arts and Science Journal of Science 21 (1): 19-31. https://doi.org/10.29233/sdufeffd.1735537.

EndNote

Erşatır M (May 1, 2026) The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts. Süleyman Demirel University Faculty of Arts and Science Journal of Science 21 1 19–31.

IEEE

[1]M. Erşatır, “The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts”, Süleyman Demirel University Faculty of Arts and Science Journal of Science, vol. 21, no. 1, pp. 19–31, May 2026, doi: 10.29233/sdufeffd.1735537.

ISNAD

Erşatır, Mehmet. “The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts”. Süleyman Demirel University Faculty of Arts and Science Journal of Science 21/1 (May 1, 2026): 19-31. https://doi.org/10.29233/sdufeffd.1735537.

JAMA

1.Erşatır M. The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts. Süleyman Demirel University Faculty of Arts and Science Journal of Science. 2026;21:19–31.

MLA

Erşatır, Mehmet. “The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts”. Süleyman Demirel University Faculty of Arts and Science Journal of Science, vol. 21, no. 1, May 2026, pp. 19-31, doi:10.29233/sdufeffd.1735537.

Vancouver

1.Mehmet Erşatır. The Extraction of Naphthoquinone and Tetralones from Walnut Green Husks Using Subcritical Water and Supercritical Carbon Dioxide Methods: Comparison of the Antioxidant Activities of the Extracts. Süleyman Demirel University Faculty of Arts and Science Journal of Science. 2026 May 1;21(1):19-31. doi:10.29233/sdufeffd.1735537