scholarly journals Avaliação do potencial antioxidante de hortaliças orgânicas durante o armazenamento a frio

2020 ◽  
Vol 12 ◽  
pp. 1145
Author(s):  
Maria Letícia De Almeida Kasctin dos Santos ◽  
Juliana Gonzales ◽  
Raul Vicenzi
Keyword(s):  
Antioxidant Activity ◽  
Cardiovascular Diseases ◽  
Phenolic Compound ◽  
Conventional Agriculture ◽  
Sudden Drop ◽  
Organic Systems ◽  
Organic Vegetables ◽  
Compound Concentration

The relation between an antioxidant-rich diet with protection against some diseases such as Alzheimer's and cardiovascular diseases has increased research on the evaluation of these components in food. Another factor related to some diseases is the consumption of food produced from conventional agriculture with the excessive use of agrochemicals and the search for food free of pesticides increases the demand for products grown in organic systems. Aiming to relate these two themes, the present study aimed to produce a kit of organic vegetables and evaluate antioxidant activity during storage at reduced temperatures. The results indicate a sudden drop in antioxidant activity and phenolic compound concentration in the first month of storage.

scholarly journals Extraction, Analysis, and Antioxidant Activity Evaluation of Phenolic Compounds in Different Italian Extra-Virgin Olive Oils

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3249 ◽  
Author(s):  
Chiara Fanali ◽  
Susanna Della Posta ◽  
Alessandra Vilmercati ◽  
Laura Dugo ◽  
Marina Russo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Compound ◽  
Limit Of Detection ◽  
Total Concentration ◽  
Total Phenolic ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Italian Regions ◽  
Compound Concentration

The analysis of phenolic compounds in extra virgin olive oils was carried out by high-performance liquid chromatography utilizing photodiode array and mass spectrometry detectors. The chromatographic profile of thirty samples from four Italian Regions highlighted the presence of secoiridoids, phenolic alcohols, flavonoids, and phenolic acid classes. A similar qualitative profile was observed with some differences in peak area and fifteen compounds were tentatively identified. Quantitative analysis was performed by UV detection considering eight standard phenolic compounds. The chromatographic method, after optimization, was validated studying some parameters, e.g., intra-day and inter-day retention time precision, limit of detection, limit of quantification, and linearity. Recovery of the method was performed achieving good results (10 and 50 g·g−1 with recovery of 72.9–92.1% (w/w) and 79.1–102.8% (w/w), respectively). In all samples secoiridoids were the main compounds ranging from 85 to more than 99% (w/w) of the total concentration of detected phenolic compounds while phenolic acids accounted for the lowest percentage (0.1–0.6%, w/w). Finally, total concentration of phenolic compounds and antioxidant activity were determined with different chemical assays. A good and significant correlation among total phenolic compound concentration and antioxidant activity was observed. A significant different phenolic compound concentration and antioxidant activity was determined between samples from Puglia and Sicily. This was studied performing statistical analysis by one-way analysis of variance (ANOVA) followed by Bonferroni post-hoc test.

Study of the phenolic compound profile and antioxidant activity of human milk from Spanish women at different stages of lactation: A comparison with infant formulas

2021 ◽  
Vol 141 ◽  
pp. 110149
Author(s):  
Silvia Sánchez-Hernández ◽  
Adelaida Esteban-Muñoz ◽  
Cristina Samaniego-Sánchez ◽  
Rafael Giménez-Martínez ◽  
Beatriz Miralles ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Human Milk ◽  
Phenolic Compound ◽  
Infant Formulas ◽  
Spanish Women

scholarly journals Antioxidant Activity of Quercetin: A Mechanistic Review

2016 ◽  
Vol 4 (12) ◽  
pp. 1134 ◽  
Author(s):  
Senay Ozgen ◽  
Ozgur Kivilcim Kilinc ◽  
Zeliha Selamoğlu
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Cardiovascular Diseases ◽  
Chemical Structure ◽  
Radical Scavenging ◽  
Antioxidant Property ◽  
Free Radical Scavenging ◽  
Polyphenolic Compounds ◽  
Structure And Properties ◽  
Treatment Of Diabetes

Flavones and flavonoids are known to have potent antioxidant activity due to intracellular free radical scavenging capacities. Flavonoids are found ubiquitously in plants as a member of polyphenolic compounds which share diverse chemical structure and properties. Quercetin is among the most efficient antioxidants of the flavonoids. The antioxidant property of quercetin has been highlighted in this review. These compounds have pivotal role in treatment of diabetes, cancers and some cardiovascular diseases.

scholarly journals Identification and antioxidant activity of phenolic compound from leaves of Scurrula parasitica L

2019 ◽  
Vol 1397 ◽  
pp. 012024
Author(s):  
Sri Atun ◽  
Asri Nur Innayati ◽  
HW Herlambang ◽  
Sri Handayani
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compound

The effect of drying on phenolic compound, antioxidant activity, and mineral contents of leaves of different olive varieties

2018 ◽  
Vol 42 (5) ◽  
pp. e13606 ◽  
Author(s):  
Ümmü Gülsüm Akbaş ◽  
Nurhan Uslu ◽  
Fahad Al Juhaimi ◽  
Mehmet Musa Özcan ◽  
Kashif Ghafoor ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compound ◽  
Mineral Contents ◽  
Olive Varieties

scholarly journals Comparison of the Phenolic Compound Profile and Antioxidant Potential of Achillea atrata L. and Achillea millefolium L.

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1530
Author(s):  
Lysanne Salomon ◽  
Peter Lorenz ◽  
Marek Bunse ◽  
Otmar Spring ◽  
Florian C. Stintzing ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Phenolic Compound ◽  
Ethyl Acetate Fraction ◽  
Total Phenolic ◽  
Phenolic Contents ◽  
Plant Parts ◽  
Metabolite Profiles ◽  
Species Specific ◽  
Hydrazyl Radical

In the present study, Achillea atrata L. and A. millefolium L. were compared for the first time with regard to their phenolic compound profile and antioxidant activity by applying the 2,2-diphenyl-picryl hydrazyl radical assay. For this purpose, aerial plant parts were consecutively extracted with solvents of increasing polarity (dichloromethane, n-butanol, ethyl acetate), revealing that the A. atrata ethyl acetate fraction showed the highest antioxidant activity with an IC50 value of 12.2 ± 0.29 µg/mL compared to 17.0 ± 0.26 µg/mL for A. millefolium. Both species revealed the presence of luteolin, apigenin, centaureidin, and nevadensin exclusively in this most polar fraction, which are known as effective 2,2-diphenyl-picryl hydrazyl radical scavengers. The antioxidant capacity of the aforementioned fractions strikingly correlated with their total phenolic contents, which was highest in the ethyl acetate fraction of A. atrata. Characterization of the metabolite profiles of both Achillea species showed only marginal differences in the presence of key compounds, whereas the concentrations of individual compounds appeared to be species-specific. Our results suggest that A. atrata, based on its compound pattern and bioactivity characteristics, has similar qualities for phytotherapy as A. millefolium.

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