Effect of gamma ray irradiation on chemical composition, antioxidant, antimicrobial, and insecticidal activities of Thymus pallescens essential oil
| Autor: | Aoumeur Baaliouamer, Mohamed Hazzit, Fazia Mouhouche, K. Alloun, Otmane Benchabane, Amirouche Chikhoune, Ahmed Benchabane |
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| Rok vydání: | 2019 |
| Předmět: |
Antioxidant
Chromatography 010405 organic chemistry Thiobarbituric acid DPPH medicine.medical_treatment 010401 analytical chemistry General Chemistry Antimicrobial 01 natural sciences 0104 chemical sciences law.invention Lipid peroxidation chemistry.chemical_compound chemistry law medicine TBARS Carvacrol Essential oil |
| Zdroj: | Acta Chromatographica. 31:57-62 |
| ISSN: | 2083-5736 |
| Popis: | The essential oils isolated by hydrodistillation from Thymus pallescens de Noe dried leaves exposed to γ-irradiation at dose levels of 0, 5, 10, 20, and 30 kGy were analyzed by gas chromatography–flame ionization detector (GC–FID) and GC–mass spectrometry (MS) and tested for their antioxidant, antimicrobial, and insecticidal activities. No qualitative change was observed in the chemical composition. Carvacrol (81.8–85.7%) was the most prominent component. Gamma-irradiation at 20 kGy affects quantitatively some components. Antioxidant activity was evaluated by four different test systems, namely, inhibition of lipid peroxidation (thiobarbituric acid reactive substance, TBARS), ferric reducing power, and scavenging of radicals DPPH• and ABTS•+. In all systems, irradiated oils at 20 and/or 30 kGy showed the most antioxidant efficiency. Overall, the antimicrobial activity conducted against seven microorganisms revealed no significant changes according to the radiation dose. Fumigation bioassays and contact me... |
| Databáze: | OpenAIRE |
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