El-Guendouz Soukaïna, Aazza Smail, Anahi Dandlen Susana, Majdoub Nessrine, Lyoussi Badiaa, Raposo Sara, Dulce Antunes Maria, Gomes Vera, Graça Miguel Maria
Laboratory of Physiology-Pharmacology-Environmental Health, Faculty of Sciences Dhar El Mehraz, BP 1796 Atlas, University Sidi Mohamed Ben Abdallah, Fez 30 000, Morocco.
Departamento de Química e Farmácia, MeditBio, Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
Antioxidants (Basel). 2019 Jul 25;8(8):243. doi: 10.3390/antiox8080243.
(thyme) is an aromatic plant and its essential oil has been applied as antimicrobial and antioxidant due to the presence of phenolic compounds. However, after steam distillation, the deodorized plant material is rejected, despite the possible presence of bioactive compounds. Ethanolic thyme waste extract revealed the presence of benzoic acid, 4-hydroxybenzoic acid, ferulic acid, caffeic acid, and sinapic acid. This waste thyme extract had the capacity for preventing the formation of primary and secondary lipid oxidation products in emulsions O/W (oil in water), constituted by diverse proportions of wheat and almond oils, without interfering with the viscosity parameters, for 10 weeks, at 37 °C. The increasing proportion of almond oil (≥50%) in the emulsion increases its resistance to oxidation, which is improved with the presence of an optimal concentration of tested thyme waste extract (0.02% and 0.04%). The waste thyme extract can, therefore, be used as an antioxidant either in food or pharmaceutical emulsions O/W, replacing the synthetic antioxidants.
百里香是一种芳香植物，由于其含有酚类化合物，其精油已被用作抗菌剂和抗氧化剂。然而，在水蒸气蒸馏后，尽管可能存在生物活性化合物，但除臭后的植物材料仍被丢弃。乙醇提取的百里香废料提取物中含有苯甲酸、4-羟基苯甲酸、阿魏酸、咖啡酸和芥子酸。这种废弃百里香提取物能够在37℃下防止由不同比例的小麦油和杏仁油构成的水包油（O/W）乳液中一级和二级脂质氧化产物的形成，且在10周内不影响粘度参数。乳液中杏仁油比例的增加（≥50%）会增强其抗氧化能力，在添加最佳浓度（0.02%和0.04%）的受试百里香废料提取物后，抗氧化能力会进一步提高。因此，废弃百里香提取物可以替代合成抗氧化剂，用作食品或药物水包油乳液中的抗氧化剂。
