Faculdade de Engenharia Química, Universidade Federal do Pará, Rua Augusto Corrêa S/N, Guamá, Belém 66075-900, Pará, Brazil.
Laboratório Adolpho Ducke-Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Terra Firme, Belém 66077-830, Pará, Brazil.
Molecules. 2022 Aug 25;27(17):5460. doi: 10.3390/molecules27175460.
The Myrtaceae family is one of the most representative in the Amazon. Several species have high added-value pharmacological potential. In order to contribute to the knowledge of the aromatic profile of Myrtaceae species from the Amazon, the present study presents the first report on the productivity, chemical composition, and antioxidant profile of the essential oil (EO) of Myrcia paivae. Dry leaves of the species were submitted to hydrodistillation to obtain their EO. The EO performance was calculated on a moisture-free basis and the analysis of the chemical profile was carried out by GC/MS. The determination of the antioxidant capacity was assessed by means of the antioxidant capacity equivalent to the inhibition Trolox of the ABTS•+ and DPPH• radicals. The results indicate that EO performance was equivalent to 1.69%. As for the chemical composition, hydrocarbon monoterpenes were predominant in the sample (>77%); terpinolene (14.70%), α-phellandrene (14.69%), γ-terpinene (9.64%), sylvestrene (7.62%), α-thujene (6.46%), and α-pinene (6.39%) were the constituents with higher content. Regarding the antioxidant capacity, the results show that the EO presented good results in the inhibition of ABTS•+ (0.886 ± 0.226 mM L−1) and DPPH• (2.90 ± 0.083 mM L−1), which can be attributed to the high monoterpene content in the sample.
桃金娘科是亚马逊地区最具代表性的科之一。许多物种具有高附加值的药理学潜力。为了促进对亚马逊地区桃金娘科物种芳香特征的了解，本研究首次报道了桃金娘 Myrcia paivae 的精油（EO）的生产力、化学成分和抗氧化特性。将该物种的干叶进行水蒸馏以获得其 EO。EO 的产率是在无水分的基础上计算的，化学特征的分析是通过 GC/MS 进行的。抗氧化能力的测定是通过 ABTS•+和 DPPH•自由基的 Trolox 抑制等效抗氧化能力来评估的。结果表明，EO 的产率相当于 1.69%。至于化学成分，单萜烃在样品中占主导地位（>77%）；松油萜（14.70%）、α-蒎烯（14.69%）、γ-萜品烯（9.64%）、柠檬烯（7.62%）、α-侧柏烯（6.46%）和α-蒎烯（6.39%）是含量较高的成分。关于抗氧化能力，结果表明 EO 在抑制 ABTS•+（0.886 ± 0.226 mM L−1）和 DPPH•（2.90 ± 0.083 mM L−1）方面表现出良好的效果，这可以归因于样品中单萜的高含量。
