Scavenging antioxidants

In this research, a single-step polymeric novel particle was synthesized from oak bark extract by nanoemulsion polymerization technique for the first time in the literature. It has been shown that the synthesized particles are achieved without losing any antioxidant and antibacterial properties of the oak bark extract. In this study, the p(OB) particles were reported for the first time and were characterized in terms of antioxidant, blood compatible, H2O2 scavenging, antibacterial, and antifungal potential to evaluate their use in biocompatible materials with drug release system potential.

13p dianmotminh02 03-05-2024 3 1   Download

Isaria cicadae, currently identified as Paecilomyces cicadae (Miq.) Samson (Cordycipitaceae, Hypocreales, Ascomycetes), is a parasitic fungus on cicadas and is considered a folk medicine in traditional medicine. In this research, the antioxidant activity of some extracts from the biomass and fruit bodies of Isaria cicadae F0004 isolated in Vietnam was investigated.

13p dianmotminh02 03-05-2024 4 1   Download

Photocatalytic degradation proficiency was studied for bromothymol blue dye. Phytochemicals-coated Nickel Oxide nanoparticles demonstrated antibacterial properties against bacteria (gram negative strain of E. coli, Pseudomonas spp. and gram positive strain of Bacillus spp.) by showing highest zone of inhibition (19 mm, 22 mm, 15 mm).the antioxidant activity of the synthesized nanoparticles were also examined and the result show that the fabricated nanoparticles exhibited significant radical scavenging activity.

10p dianmotminh02 03-05-2024 5 2   Download

In this research, five compounds were isolated from Chrysanthemum indicum L flowers and determined their structures to be Syringin (1), Dihydrosyringin (2), Benzyl-O-β-Dglucopyranoside(3), -Phenylethoxy-O-β-D-glucopyranoside(4), and (Z)-5’-Hydroxyjasmone 5’-O-β-D-Glucopyranoside(5)by analysis 1D - NMR spectra and compared to literatures.

6p vimarillynhewson 02-01-2024 8 3   Download

To investigate the influence of the banana ripening stage on the change in the content of bioactive components and their bioactivities, ripening stages of porcelain banana peels were screened for the total phenolic content (TPC) and antioxidant activities using three methods, including DPPH scavenging assay, ferric reducing/antioxidant power (FRAP) assay, and inhibition of polyphenol oxidase activity (PPO assay).

9p vimichaelfaraday 28-12-2023 11 3   Download

The present study was undertaken to investigate the use of leaves and fruits extract of sidr as antioxidant and the study effect of crude sidr juice (leaves and fruits) on rat serum constituents.

8p viisac 23-09-2023 3 1   Download

In this study Roselle seed protein isolates were digested using pepsin followed by pancreatin at different time in order to produce hydrolysate with good antioxidant. The prepared hydrolysates were as effective as antioxidants in model systems, in scavenging of free radicals. This effect was concentration-dependent and was also influenced by the hydrolysis time.

9p viisac 23-09-2023 6 1   Download

In this research, a set of experiments was carried out for identifying the optimum conditions of independent variables affecting phenolic content extraction efficiency and antioxidant activity of soybean seeds (Glycine max L.).

6p viisac 23-09-2023 2 1   Download

Fruit juice serves as a source of energy, vitamins, minerals and dietary fiber. In addition, certain fruit juices contribute bioactive compounds with different functional properties to human. Eggplant is ranked as one of top ten vegetable sin terms of oxygen radical scavenging capacity due to the fruit’s phenolic constituents.

3p viisac 23-09-2023 2 1   Download

Ochracene I is a representative sesquiterpenoid compound available in natural marine fungus. Hydroxyl radical scavenging activity of Ochracene I (OCHR) has been studied in aqueous phase using density functional theory M06-2X functional in conjunction with 6-31+G(d,p) basis set. Four common antioxidant mechanisms have been screened: hydrogen transfer (HT), radical adduct formation (RAF), proton loss (PL) and single electron transfer (SET).

9p nhanchienthien 25-07-2023 6 3   Download

This study assesses the antioxidant potential of mushroom Calocybe indica with the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging methods and the total antioxidant capacity.

8p vispiderman 15-06-2023 5 1   Download

The aims of this study were to investigate the antioxidant and antimicrobial activities of some spice plants including cinamon bark, ginger root, curcuma root and piper leaves. The terms for investigation of antioxidant activity were DPPH radical scavenging activity and ferric reducing power.

7p vidoctorstrange 06-05-2023 4 3   Download

This study aimed to investigate the stability of Terminalia nigrovenulosa (T. nigrovenulosa) extract in response to heating treatment and hydrogen peroxide at pH 4 and pH 7. The changes of total polyphenol content, DPPH radical scavenging and reducing power were examined. The obtained results showed that the investigated extract was relatively stable under heating and sterilization condition (pH 4). However, it was unstable at pH 7.

9p vidoctorstrange 06-05-2023 5 3   Download

We have carried out studying for antioxidant activity of 58 extracts prepared from vegetables and fruits in Viet Nam by three methods including DPPH and H2O2 scavenging activity assays and determination of total flavonoid content (TFC). Ethanol extract of Tamarind seed (NTBT-17), Grape seed (NTBT-19) and Mangosteen peel (TNB-10) showed high amount of TFC which is 848.8, 655.9 and 422.9 mgQE/100g, respectively.

8p vidoctorstrange 06-05-2023 6 3   Download

This study screened phytochemicals to determine their total polyphenols content (TPC) by Folin-Ciocalteu reagents and to evaluate antioxidant activity using DPPH scavenging, ABTS cation decolorization, and reducing power assays of various extracts of Symplocos cochinchinensis leaves. A correlation between TPC and antioxidant activity was analysed by Pearson’s method.

6p vicedric 08-02-2023 4 1   Download

The synthesis of natural products 2-(2,3-dibromo-4,5-dihydroxyphenyl)acetic acid (1) and 2-(2,6-dibromo-3,5- dihydroxyphenyl)acetic acid (2) and as well as their derivatives 25 and 26 were carried out by substitution, hydrolysis and demethylation reactions of the corresponding four benzyl bromides. The antioxidant potentials of benzylic acid-derived bromophenols were, for the first time, appraised by several outstanding bioanalytical methods.

23p lyhuyenthu 31-01-2023 8 2   Download

This study uses sunflower hulls, a by-product from the sunflower snack industry, to recover both, valuable phenolic compounds and cellulose fibers, for the production of antioxidant reinforced starch films as potential food packaging material. The phenolic extract provided antioxidant properties to the films with EC50 values of 89 mg film/mg DPPH.

7p viginny 30-12-2022 14 2   Download

The antioxidant compounds benefit human health and plant to develop defense mechanisms under environmental stresses, such as drought stress. This study aims to evaluate the defense mechanism of melinjo under drought stress.

6p schindler 30-12-2021 13 0   Download

The aim of this study is to estimate phytochemical constituents and antioxidant activities of tomato slices treated by microwave heating. Two treatments time were applied, 30 and 300 s. Quantitative analyses of phenols, flavonoids, lycopene, followed by the evaluation of the antioxidant activity by DPPH (2,2-diphenyl-1-picrylhydrazyl) and ion chelating methods, were conducted on ethanolic extracts.

5p schindler 30-12-2021 6 0   Download

This study was the first fatty acid analysis and biological activity report on an endemic Achillea species, Achillea cappadocica Hausskn. et Bornm. The major compounds in the fatty acid were identified as oleic (34.7%), palmitic (23.1%), and linoleic acids (20.6%). The methanol and water extracts indicated higher ABTS cation radical scavenging activity than that of α-tocopherol and BHT at 100 µg/mL. The acetone extract showed 70.62% inhibitory activity against butyrylcholinesterase at 200 µg/mL. The acetone and methanol extracts exhibited moderate antimicrobial activity.

8p langthannam 29-12-2021 17 0   Download