Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy

Mantovani, Ana Carolina Gomes; Chendynski, Letícia Thaís; Galvan, Diego; Borsato, Dionísio; Mauro, Eduardo Di

doi:10.21577/0103-5053.20200052

Cited by 2 publications

(1 citation statement)

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“…Only the EMFMh indicated signals near 5.5 ppm. Multiplets in this region 5.0-5.7 ppm can be attributed to olefin hydrogens [45]. Examples of olefinic compounds include terpenes [46], saponins [47], steroids [48], or unsaturated fatty acids [49].…”

Section: H-nmrmentioning

confidence: 99%

The Free Radical Scavenging Property of the Leaves, Branches, and Roots of Mansoa hirsuta DC: In Vitro Assessment, 3D Pharmacophore, and Molecular Docking Study

et al. 2022

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In this work, a metabolic profile of Mansoa hirsuta was investigated, and in vitro assays and theoretical approaches were carried out to evaluate its antioxidant potential. The phytochemical screening detected saponins, organic acids, phenols, tannins, flavonoids, and alkaloids in extracts of leaves, branches, and roots. Through LC-MS analysis, the triterpenes oleanolic acid (m/z 455 [M-H]−) and ursolic acid (m/z 455 [M-H]−) were identified as the main bioactive components. The extracts of the leaves, branches, and roots revealed moderate antioxidant potential in the DPPH test and all extracts were more active in the ABTS test. The leaf extracts showed better antioxidant capacity, displaying IC50 values of 43.5 ± 0.14, 63.6 ± 0.54, and 56.1 ± 0.05 µg mL−1 for DPPH, ABTS, and kinetics assays, respectively. The leaf extract showed higher total flavonoid content (TFC) (5.12 ± 1.02 mg QR/g), followed by branches (3.16 ± 0.88 QR/g) and roots (2.04 ± 0.52 QR/g/g). The extract of the branches exhibited higher total phenolic content (TPC) (1.07 ± 0.77 GAE/g), followed by leaves (0.58 ± 0.30 GAE/g) and roots (0.19 ± 0.47 GAE/g). Pharmacophore and molecular docking analysis were performed in order to better understand the potential mechanism of the antioxidant activity of its major metabolites.

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Section: H-nmrmentioning

confidence: 99%

The Free Radical Scavenging Property of the Leaves, Branches, and Roots of Mansoa hirsuta DC: In Vitro Assessment, 3D Pharmacophore, and Molecular Docking Study

et al. 2022

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Ferritin and Free Radicals Species in Seeds by Electron Paramagnetic Resonance

Valezi

Mantovani

Constante

et al. 2021

EUR J SUSTAIN DEV RES

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Biodiesel is a relevant source of renewable energy which has received a lot of attention due to the need to create a renewable fuel matrix. An important source of raw material for the biodiesel production is oilseeds. Considering the lack of studies characterizing magnetic species present in seeds, different types of oilseed samples were characterized and compared using X-band Electron Paramagnetic Resonance spectroscopy, at room temperature and 30 K. It was identified the presence of the semiquinone radical in all seed's samples. Besides the free radical resonance, the presence of ferritin was observed, that is an important Fe complex present in seeds and plants, which, although very studied, still lacks a precise description related with its storage and other processes. This study can potentially assist future research about biodiesel and other products that have seeds as raw material.

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Evaluation of the Oxidation Degradation Process of Biodiesel via 1H NMR Spectroscopy

Cited by 2 publications

References 32 publications

The Free Radical Scavenging Property of the Leaves, Branches, and Roots of Mansoa hirsuta DC: In Vitro Assessment, 3D Pharmacophore, and Molecular Docking Study

The Free Radical Scavenging Property of the Leaves, Branches, and Roots of Mansoa hirsuta DC: In Vitro Assessment, 3D Pharmacophore, and Molecular Docking Study

Ferritin and Free Radicals Species in Seeds by Electron Paramagnetic Resonance

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