scholarly journals Se-O Bond Is Unique to High Se Enriched Sweet Potato Stem Protein with Better Antioxidant Ability

Foods ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 3064
Author(s):  
Qi Gao ◽  
Jia-Le Wu ◽  
Lan-Ping Jiang ◽  
Su-Qi Sun ◽  
Xue-Jun Gu ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Energy Dispersive Spectrometry ◽  
Structural Characteristics ◽  
Radical Scavenging ◽  
Dpph Radical ◽  
Enrichment Method ◽  
Potato Plants ◽  
Ft Ir ◽  
Dpph Radical Scavenging ◽  
Thermal Stability Of

Sweet potato plants were treated with selenium (Se). Spraying Se on the sweet potato leaves was an effective Se enrichment method and proteins were extracted from the sweet potato stem. The structural characteristics of the protein were investigated. Fourier transform infrared spectroscopy (FT-IR) detected more signals from the Se-enriched sweet potato stem protein (SSP), and the number of forms of Se chemical bonds gradually increased with increasing Se content, such as the Se-O bond in high Se-enriched SSP, indicating altered secondary structures.Scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) indicated more Se atoms in the Se-enriched SSPs (SSSPs). The DSC results revealed that Se enrichment enhanced the thermal stability of the samples. Moreover, selenomethionine (SeMet), selenocystine (SeCys2), and methylselenocysteine (MeSeCys) were determined to be the main Se forms in the SSSPs. Furthermore, the SSSPs showed relatively higher superoxide anion radical and DPPH radical scavenging activities than the blank, which indicates that SSSPs can be used as antioxidants. By recovering the proteins, the agricultural by-product—sweet potato stem can be further utilized, and the obtained Se-enriched proteins may contribute to human health.

Synthesis, characterization and antioxidant activity of 2-(4-Phenyl-6-p-Tolylpyrimidin-2-ylthio)-N-(4-substituted Phenyl)acetamides

2021 ◽  
Vol 25 (11) ◽  
pp. 86-92
Author(s):  
Sureshkumar K. Dhakhda ◽  
Malay J. Bhatt ◽  
Jyotindra J. Bhatt
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Catalytic Amount ◽  
Equimolar Amount ◽  
Spectroscopic Techniques ◽  
Dpph Radical ◽  
Antioxidant Assay ◽  
Starting Compound ◽  
Ft Ir ◽  
Dpph Radical Scavenging

A series of 2-(4-phenyl-6-p-tolylpyrimidin-2-ylthio)-N- (4-substituted phenyl)acetamide(4a-o) has been synthesized. Compounds have been characterized and tested for their antioxidant activity. The titled compounds (4a-o) have been synthesized by the reaction between 4-phenyl-6-p-tolylpyrimidine-2-thiol (2) with 2-chloro-N-substituted phenylacetamide (3ao) refluxed in acetone using catalytic amount of K2CO3. Compound (2) has been synthesized from (E)-1-phenyl- 3-p-tolylprop-2-en-1-one (1) with equimolar amount thiourea refluxed in alcoholic KOH to get compound (2). Starting compound chalcone was synthesized by Claisen-Schmidt condensation. All synthesized compounds have been characterized using spectroscopic techniques such as FT-IR, 1H NMR, 13C NMR, Mass Spectrometry and elemental analysis. Antioxidant assay has been performed by using DPPH radical scavenging method. Compounds 4-h and 4-o have shown good antioxidant activity.

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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