Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/7285
Title: Valorization of sesame (Sesamum indicum L.) seed coats: Optimization of polyphenols’ extraction using Ired-Irrad® and assessment of their biological activities
Authors: Khazaal, Salma
Louka, Nicolas
Debs, Esperance 
Khalil, Mahmoud I.
Albiss, Borhan
A. Al-Nabulsi, Anas
Jammoul, Adla
Osaili, Tareq M.
Darra, Nada El
Affiliations: Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut P.O. Box 11-5020, Lebanon
Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut P.O. Box 11-5020, Lebanon
Department of Biology 
Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut P.O. Box 11-5020, Lebanon
Nanomaterials Laboratory, Department of Applied Physics, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
Food Department, Lebanese Agricultural Research Institute, P.O. Box 2611, Fanar, Beirut, 1107 2809, Lebanon
Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
Department of Nutrition & Dietetics, Faculty of Health Sciences, Beirut Arab University, Tarik El Jedidah, Riad El Solh, P. O. Box 115020, Beirut 1107 2809, Lebanon
Editors: Professor Yangchao Luo
Keywords: Antibacterial activity
Ired-irrad
Polyphenols
Sesame seed coat
Sesamum indicum
Antibacterial activity
Issue Date: 2024-06-01
Publisher: Science Direct
Part of: Journal of Agriculture and Food Research
Volume: 16
Start page: 1
End page: 10
Abstract: 
Sesame (Sesamum indicum L.) seed coat (SSC) is a by-product generated during the production of sesame paste, known as tahini. Research has demonstrated that this by-product is abundant in valuable nutritional compounds. Various extraction methods are employed to enhance the value of industrial waste by recovering its bioactive compounds. The study aims to optimize the extraction of polyphenols utilizing an infrared technique Ired-Irrad® (IR), in comparison to the water bath (WB) extraction. To optimize the extraction of polyphenols from SSC using both the IR and WB extraction methods, the study utilized Response Surface Methodology (RSM). Under optimal conditions, IR extraction resulted in an improved polyphenol yield, which was 20% higher than that obtained using WB extraction. Similarly, the antiradical activity, quantified as mg of Trolox equivalent per milliliter, increased from 0.58 mg TE/mL in the WB extract to 0.68 mg TE/mL in the IR extract. The phytochemical profile of the IR and WB extracts was examined through High-Performance Liquid Chromatography (HPLC). The major polyphenols identified in both extracts were the flavonoids rutin (3.87 mg/L in IR, 1.72 mg/L in WB) and catechin (3.05 mg/L in IR, 1.32 mg/L in WB). The IR extract revealed the highest yield of polyphenols among the majority of compounds, compared to WB. The lyophilized SSC extracts obtained through both the IR and WB methods demonstrated the most effective antibacterial activity against Listeria monocytogenes, with a minimal bactericidal concentration (MBC) value exceeding 100 mg/mL. However, minor antibacterial effects were detected against the Gram-negative strains, Salmonella Typhimurium and Escherichia coli O157:H7, for extracts obtained with both the IR and WB methods.
URI: https://scholarhub.balamand.edu.lb/handle/uob/7285
DOI: 10.1016/j.jafr.2024.101105
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Biology

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