Oregano essential oil interactions with photogenerated singlet molecular oxygen,Photochemistry and Photobiology

当前位置： X-MOL 学术 › Photochem. Photobiol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Oregano essential oil interactions with photogenerated singlet molecular oxygen
Photochemistry and Photobiology ( IF 2.6 ) Pub Date : 2020-05-25 , DOI: 10.1111/php.13265
Frida C D Dimarco Palencia ₁ , Vanesa A Muñoz ₁ , Ariana C Posadaz ₂ , Diego A Cifuente ₃ , Sandra Miskoski ₄ , Gabriela V Ferrari ₁ , Norman A García ₄ , María P Montaña ₁

Affiliation

Essential oils are a mixture of volatile compounds, products of the secondary metabolism of plants. Once extracted, they can be deteriorated losing their organoleptic and therapeutic properties due to various environmental factors, being light exposure in aerobic conditions the main cause. In this work, the oregano essential oil extraction and characterization from Origanum vulgare plants grown in the experimental field of the FTU‐UNSL and its photodegradation in MeOH:H2O 60:40 v/v solvent were studied. Characterization by EIMS and NIST Mass Spectrometry indicates the main compounds of oregano essential oil, quantified in the extracted oil by GC‐MS, are carvacrol (7.14%) and thymol (47.37%). Degradation of essential oil and its two major components can be caused by reactive oxygen species photogenerated from endogenous sensitizers as riboflavin. Our results suggest degradation occurs involving singlet molecular oxygen. Interaction of carvacrol and thymol with singlet oxygen is mainly a physical process, while essential oil has an important reactive component, which indicates there might be other constituents which could contribute to reactive photoprotection. The effect of simultaneous presence of oregano essential oil and tryptophan amino acid—used as a photooxidizable model under riboflavin‐photosensitizing conditions—was studied in order to evaluate the possible photoprotection exerted by the essential oil.

中文翻译：

牛至精油与光生单线态分子氧的相互作用

精油是挥发性化合物的混合物，是植物次级代谢的产物。一旦提取，它们可能会由于各种环境因素而变质，失去感官和治疗特性，主要原因是在有氧条件下曝光。在这项工作中，研究了 FTU-UNSL 实验田中生长的牛至植物的牛至精油提取和表征及其在 MeOH:H2O 60:40 v/v 溶剂中的光降解。EIMS 和 NIST 质谱的表征表明牛至精油的主要化合物，通过 GC-MS 在提取的油中定量，是香芹酚 (7.14%) 和百里酚 (47.37%)。精油及其两个主要成分的降解可能是由内源性敏化剂（如核黄素）光产生的活性氧物质引起的。我们的结果表明降解发生涉及单线态分子氧。香芹酚和百里酚与单线态氧的相互作用主要是一个物理过程，而精油具有重要的反应性成分，这表明可能还有其他成分有助于反应性光保护。研究了同时存在牛至精油和色氨酸氨基酸（在核黄素光敏条件下用作光氧化模型）的影响，以评估精油可能发挥的光保护作用。这表明可能存在其他有助于反应性光保护的成分。研究了同时存在牛至精油和色氨酸氨基酸（在核黄素光敏条件下用作光氧化模型）的影响，以评估精油可能发挥的光保护作用。这表明可能存在其他有助于反应性光保护的成分。研究了同时存在牛至精油和色氨酸氨基酸（在核黄素光敏条件下用作光氧化模型）的影响，以评估精油可能发挥的光保护作用。

更新日期：2020-05-25

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11