In vitro antioxidant properties of golden grass (<i>Syngonanthus nitens</i>) by electron paramagnetic resonance

Barroso, Rafael P.; Berlim, Leonardo S.; Ito, Amando Siuiti; Costa-Filho, Antonio J.

doi:10.1002/fsn3.969

Cited by 6 publications

(2 citation statements)

References 43 publications

(52 reference statements)

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“…There are a large number of modifications of this spectrophotometric approach at present [ 4 , 5 , 6 ]. Since the DPPH • has paramagnetic properties, the use of molecules in the EPR spectroscopy is sufficiently developed, including for the study of the antioxidant properties of various objects [ 7 , 8 ]. At the same time, the use of spectroscopic methods is limited by the range of determined concentrations and the color of the studied solutions, and the EPR methods are very expensive.…”

Section: Introductionmentioning

confidence: 99%

The Novel Potentiometric Approach to Antioxidant Capacity Assay Based on the Reaction with Stable Radical 2,2′-diphenyl-1-picrylhydrazyl

et al. 2022

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For the first time, new possibilities of using the DPPH• as a signal-forming oxidant molecule with potentiometric detection are shown. The CV method confirmed the presence of a quasi-reversible potential-determining system DPPH•/DPPH-H under experimental conditions. This fact makes it possible to use DPPH• as the model of the oxidizing agent for obtaining an analytical signal by the potentiometry method. The potentiometric approach makes it possible to obtain the value of the Nernst slope and the antioxidant capacity in one experiment. It consists of an antioxidant supplement and two consecutive DPPH• supplements. In this case, the calculation of the Nernst slope is carried out by introducing the second addition of the oxidizing agent and constructing a calibration curve against the reaction background with an antioxidant. Solutions of individual antioxidants α-tocopherol, quercetin, (±)-catechin hydrate, and α-lipoic acid were studied by the developed approach. A high correlation with the results of spectrophotometric measurements is shown. At the same time, the potentiometry method is devoid of the concentration limitations of the spectrophotometric method, which was confirmed. In the study of plant materials extracts, a high correlation of antioxidant capacity, obtained by potentiometric and spectrophotometric methods, was shown only for objects whose color did not contribute to the DPPH• absorption. The versatility of the potentiometric method for studying objects of any color was shown.

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Section: Introductionmentioning

confidence: 99%

The Novel Potentiometric Approach to Antioxidant Capacity Assay Based on the Reaction with Stable Radical 2,2′-diphenyl-1-picrylhydrazyl

et al. 2022

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“…Luteolin ( 12 ) and isoorientin ( 47 ) were also used to investigate kinetics of reaction between DPPH and flavonoids. As a result , S. nitens showed a high antioxidant capacity the authors attributed to the presence of flavonoids, and 47 presented an antioxidant activity 40% higher than 12 [ 58 ].…”

Section: Resultsmentioning

confidence: 99%

Review on Compounds Isolated from Eriocaulaceae Family and Evaluation of Biological Activities by Machine Learning

et al. 2022

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Eriocaulaceae is a pantropical family whose main center of biodiversity is in Brazil. In general, the family has about 1200 species, in which phytochemical and biological studies have shown a variety of structures and activities. The aim of this research is to compile the compounds isolated in the Eriocaulaceae family and carry out a computational study on their biological targets. The bibliographic research was carried out on six databases. Tables were built and organized according to the chemical class. In addition, a summary of the methods of isolating the compounds was also made. In the computational study were used ChEMBL platform, DRAGON 7.0, and the KNIME 4.4.0 software. Two hundred and twenty-two different compounds have been isolated in sixty-eight species, divided mainly into flavonoids and naphthopyranones, and minor compounds. The ligand-based virtual screening found promising molecules and molecules with multitarget potential, such as xanthones 194, 196, 200 and saponin 202, with xanthone 194 as the most promising. Several compounds with biological activities were isolated in the family, but the chemical profiles of many species are still unknown. The selected structures are a starting point for further studies to develop new antiparasitic and antiviral compounds based on natural products.

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Isoorientin Isolated from the Algerian Halophyte Limonium thouinii (Viv.) Kuntze as a Multifunctional Cosmetic Ingredient: Antioxidant and Photoprotective Effects Evaluation

Lefahal

Makhloufi

BOUSSETLA

et al. 2022

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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In vitro antioxidant properties of golden grass (Syngonanthus nitens) by electron paramagnetic resonance

Cited by 6 publications

References 43 publications

The Novel Potentiometric Approach to Antioxidant Capacity Assay Based on the Reaction with Stable Radical 2,2′-diphenyl-1-picrylhydrazyl

The Novel Potentiometric Approach to Antioxidant Capacity Assay Based on the Reaction with Stable Radical 2,2′-diphenyl-1-picrylhydrazyl

Review on Compounds Isolated from Eriocaulaceae Family and Evaluation of Biological Activities by Machine Learning

Isoorientin Isolated from the Algerian Halophyte Limonium thouinii (Viv.) Kuntze as a Multifunctional Cosmetic Ingredient: Antioxidant and Photoprotective Effects Evaluation

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