scholarly journals Antioxidant and antiradical activity of ferulates

2011 ◽  
Vol 23 (No. 2) ◽  
pp. 64-68 ◽  
Author(s):  
M. Karamać ◽  
A. Buciński ◽  
B. Pegg R ◽  
R. Amarowicz
Keyword(s):  
Antiradical Activity ◽  
Radical Scavenging ◽  
Beta Carotene ◽  
Hydroxyl Group ◽  
Dpph Radical ◽  
Meta Position ◽  
Antiradical Properties ◽  
Isoferulic Acid ◽  
Methyl Ferulate ◽  
Dpph Radical Scavenging

Antioxidant and antiradical activities of ferulates (i.e., ferulic acid, isoferulic acid, coniferyl aldehyde, and methyl ferulate) were investigated using a &beta;-carotene-linoleate model system and a DPPH radical scavenging assay, respectively. Compounds so tested exhibited antioxidant and antiradical properties to varying degrees. Methyl ferulate showed the strongest antioxidant activity, whereas the parent phenolic acid was the most active ferulate to scavenge the DPPH radical (DPPH<sup>&middot;</sup>). Isoferulic acid at concentrations ranging from 10 to 100 nmol/assay did not impart an antiradical efficacy; this may be attributed to the location of the hydroxyl group in the meta position on the aromatic ring. &nbsp;

scholarly journals DPPH-Scavenging Activities and Structure-Activity Relationships of Phenolic Compounds

2010 ◽  
Vol 5 (11) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Cheng-Dong Zheng ◽  
Gang Li ◽  
Hu-Qiang Li ◽  
Xiao-Jing Xu ◽  
Jin-Ming Gao ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antiradical Activity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Basic Structure ◽  
Hydroxyl Group ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Dpph Scavenging ◽  
Dpph Radical Scavenging

Thirty-eight phenolic compounds (including 31 flavonoids) were examined for their DPPH radical-scavenging activities, and structure-activity relationships were evaluated. Specifically, the presence of an Ortho-dihydroxyl structure in phenolics is largely responsible for their excellent antiradical activity. 3-Hydroxyl was also essential to generate a high radical-scavenging activity. An increasing number of hydroxyls on flavones with a 3′,4′-dihydroxyl basic structure, the presence of a third hydroxyl group at C-5′, a phloroglucinol structure, glycosylation and methylation of the hydroxyls, and some other hydroxyls, for example 5-, and 7-hydroxyl in ring A, decreased the radical-scavenging activities of flavonoids and other phenolics.

scholarly journals Phytochemical Analysis and Antiradical Properties of Sarcodon imbricatus (L.:Fr) Karsten

2008 ◽  
Vol 3 (11) ◽  
pp. 1934578X0800301 ◽  
Author(s):  
Maria Carla Marcotullio ◽  
Gildas Norbert Oball-Mond Mwankie ◽  
Lina Cossignani ◽  
Bruno Tirillini ◽  
Rita Pagiotti
Keyword(s):  
Antiradical Activity ◽  
Unsaturated Fatty Acids ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Nutritional Composition ◽  
Phytochemical Analysis ◽  
Ergosterol Peroxide ◽  
Antiradical Properties ◽  
Dpph Radical Scavenging ◽  
Good Food

The chemical composition of Sarcodon imbricatus (L.:Fr) Karsten (Hydnaceae) was evaluated to assess it as source of nutrients and nutraceuticals. The analyzed mushroom contains ergosterol and ergosterol peroxide. S. imbricatus methanolic extract showed a moderate antiradical activity (measured by DPPH radical scavenging activity). The combination of bioactive compounds and rich nutritional composition (high contents in protein, low content in fat, and its content of unsaturated fatty acids) makes the mushroom a good food.

scholarly journals Effect of microwave-assisted extraction on bioactive compounds from industrial tomato waste and its antioxidant activity

Food Research ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 468-474
Author(s):  
P. Lasunon ◽  
N. Phonkerd ◽  
P. Tettawong ◽  
N. Sengkhamparn
Keyword(s):  
Antioxidant Activity ◽  
Microwave Power ◽  
Radical Scavenging ◽  
Beta Carotene ◽  
Bioactive Compound ◽  
Total Phenolic ◽  
Dpph Radical ◽  
Microwave Assisted ◽  
Tomato Waste ◽  
Dpph Radical Scavenging

The bioactive compound of tomato waste from industry was microwave-assisted extracted in different conditions including microwave powers of 180, 300 and 450 W and the extraction time of 30, 60 and 90 s. After extraction, the fractionation was performed to separate the hydrophobic fraction (hexane fraction) and hydrophilic fraction (ethanolic fraction). The bioactive compound and its DPPH radical scavenging activity were determined. For the hydrophobic part, the results showed that the microwave power of 300 W for 60 s gave the highest trans-lycopene and beta-carotene (5.74 mg lycopene/100 g and 4.83 mg beta-carotene/100 g) while the highest DPPH radical scavenging was the extracts at a microwave power of 180 W for 90 s. For hydrophilic parts, the best extraction condition giving the highest total phenolic compound (280.10 mg GAE/100 g) and total flavonoid content (9832.52 mg CE/100 g DM) were at 180 W for 90 s and 450 W for 30 s, respectively. However, the highest antioxidant activity was the extract of 300 W for 60 s. Fuzzy assessment analysis exhibited that the best condition was microwave power of 300 W for 60 s with high antioxidant activity of both fractions.

Carum copticum L. essential oils as natural antimicrobial and antioxidant

2018 ◽  
Vol 44 (4) ◽  
pp. 515-520
Author(s):  
M Kazemi
Keyword(s):  
Essential Oils ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Dpph Radical ◽  
Dpph Radical Scavenging Activity ◽  
Carum Copticum ◽  
Microbial Strains ◽  
Pharmaceutical Industries ◽  
Dpph Radical Scavenging ◽  
Antioxidant Effects

Carum copticum L. comprises several relevant species for food, cosmetic, perfumery and pharmaceutical industries. GC/MS analysis of the enential oil of C. copticum revealed γ- terpinene as a major component of C. copticum, with its contribution of 33.85%. Essential oils (EOs) exhibited a significant antimicrobial activity against all tested microbial strains. In addition, the C. copticum oil demonstrated the highest DPPH radical scavenging activity. These results clearly show the antimicrobial and antioxidant effects of the plant essential oil.

scholarly journals A simple new method for aged seed utilization based on melatonin-mediated germination and antioxidant nutrient production

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Song Yu ◽  
Xuetian Zhu ◽  
Helin Yang ◽  
Lihe Yu ◽  
Yifei Zhang
Keyword(s):  
Total Phenolics ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Dpph Radical ◽  
Radical Scavenging Capacity ◽  
Scavenging Capacity ◽  
Aged Seed ◽  
Phenolics Content ◽  
Dpph Radical Scavenging ◽  
Aged Seeds

AbstractSeed deterioration, coupled with a decrease in nutrients, is unavoidable following long-term storage, and these seeds are therefore used as livestock fodder. Here, we developed a simple, rapid and efficient method of producing high amounts of antioxidants from deteriorated seeds via melatonin-induced germination. Legume seeds were subjected to high humidity at 55 °C for 12–36 h to obtain aged seeds with a 40% germination rate and severely reduced antioxidant nutrition (total phenolics content, ferric reducing power and 1,1-diphenyl-2-picryhydrazyl (DPPH) radical scavenging capacity). Aged seeds were then treated with 0.1 mM melatonin, resulting in the production of sprouts with a higher total phenolics content (fivefold), greater ferric reducing power (sevenfold) and greater DPPH radical scavenging capacity (twofold) compared to the aged seeds. These findings suggest that melatonin treatment efficiently converted aged seed reserve residues into antioxidant nutrients, providing an alternative use for deteriorated seeds in food production.

scholarly journals Phytochemical, antioxidant and antimicrobial properties of Litsea angulata extracts

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 1839
Author(s):  
Harlinda Kuspradini ◽  
Indah Wulandari ◽  
Agmi Sinta Putri ◽  
Sabeti Yulis Tiya ◽  
Irawan Wijaya Kusuma
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Antimicrobial Properties ◽  
Phytochemical Analysis ◽  
Dpph Radical ◽  
Free Radical Formation ◽  
Dpph Radical Scavenging ◽  
Phytochemical Constituent ◽  
Microdilution Broth

Background: Litsea angulata is a plant species belonging to Lauraceae family that is distributed throughout Indonesia, Malaysia, and New Guinea. The seeds have been traditionally used by local people in Kalimantan, Indonesia for the treatment of boils; however, there is no information about the potency of its branch, bark and leaves yet. This study aimed to determine the antioxidant, antimicrobial activity as well as the phytochemical constituent of Litsea angulata branch, bark, and leaves. Methods: Extraction was performed by successive maceration method using n-hexane, ethyl acetate, and ethanol solvent. Antioxidant activity was evaluated by DPPH radical scavenging assay. The antimicrobial activity using the 96 well-plate microdilution broth method against Staphylococcus aureus and Streptococcus mutans. Results: Based on the phytochemical analysis, it showed that extract of L. angulata contains alkaloids, flavonoids, tannins, terpenoids, and coumarin. The results showed that all extracts of plant samples displayed the ability to inhibit DPPH free radical formation and all tested microorganisms. Conclusions: L. angulata contains secondary metabolites such as alkaloids, flavonoids, tannins, terpenoids, carotenoids, and coumarin. The antioxidant activity on different plant extracts was a range as very strong to weak capacity. All extracts in this study could inhibit the growth of S. aureus and S. mutans.

scholarly journals Antiglycation and Antioxidant Properties of Ficus deltoidea Varieties

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Nur Sumirah Mohd Dom ◽  
Nurshieren Yahaya ◽  
Zainah Adam ◽  
Nik Mohd Afizan Nik Abd. Rahman ◽  
Muhajir Hamid
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Protein Carbonyl ◽  
Scavenging Activity ◽  
Dpph Radical ◽  
Dpph Radical Scavenging Activity ◽  
Ficus Deltoidea ◽  
Dpph Radical Scavenging

The present study aimed to evaluate the potential of standardized methanolic extracts from seven Ficus deltoidea varieties in inhibiting the formation of AGEs, protein oxidation, and their antioxidant effects. The antiglycation activity was analyzed based on the inhibition of AGEs, fructosamine, and thiol groups level followed by the inhibition of protein carbonyl formation. The antioxidant activity (DPPH radical scavenging activity and reducing power assay) and total phenolic contents were evaluated. After 28 days of induction, all varieties of Ficus deltoidea extracts significantly restrained the formation of fluorescence AGEs by 4.55–5.14 fold. The extracts also reduced the fructosamine levels by 47.0–86.5%, increased the thiol group levels by 64.3–83.7%, and inhibited the formation of protein carbonyl by 1.36–1.76 fold. DPPH radical scavenging activity showed an IC50 value of 66.81–288.04 μg/ml and reducing power activity depicted at 0.02–0.24 μg/ml. The extent of phenolic compounds present in the extracts ranged from 70.90 to 299.78 mg·GAE/g. Apart from that, correlation studies between the activities were observed. This study revealed that seven varieties of Ficus deltoidea have the potential to inhibit AGEs formation and possess antioxidant activity that might be attributed to the presence of phenolic compounds.

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