Evidence map›Paper›PMID 42851991›Full record

ArticleACS omega2026

Comparative Evaluation of Electron Paramagnetic Resonance and Spectrophotometry for DPPH-Based Antioxidant Capacity Determination.

Helvis L S Fontoura, Ana Flávia L M Nascimento, Francine A F Menezes, Pâmela V Rocha, Stanislau Bogusz, Nádia R Pereira, André O Guimarães

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Helvis L S FontouraUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Físicas, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.
Ana Flávia L M NascimentoUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Físicas, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.
Francine A F MenezesUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Físicas, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.
Pâmela V RochaUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Tecnologia de Alimentos, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.
Stanislau BoguszUniversidade de São Paulo, Instituto de Química de São Carlos. Department of Chemistry and Molecular Physics, São Carlos 13.560-970, Brazil.ORCID https://orcid.org/0000-0002-4382-5745
Nádia R PereiraUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Tecnologia de Alimentos, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.ORCID https://orcid.org/0000-0002-0901-3356
André O GuimarãesUniversidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Físicas, Campos do Goytacazes 28.013-602, State of Rio de Janeiro Brazil.ORCID https://orcid.org/0000-0003-3136-0343

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The DPPH (2,2-diphenyl-1-picrylhydrazyl) assay is one of the most widely used methods for determining the radical scavenging capacity (RSC), yet discrepancies between spectrophotometric and electron paramagnetic resonance (EPR) measurements remain insufficiently addressed. In this study, simultaneous RSC measurements were performed by EPR and spectrophotometry to investigate the systematic differences between the methods. The results demonstrate that spectrophotometric measurements can underestimate RSC due to residual absorbance arising from neutralized DPPH and eventual decomposition products, leading to significant differences in IC

Identifiers

PMID42851991
PMCPMC13647961

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.