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Free radical scavenging activity

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Antioxidant, anticholinesterase, and antimicrobial activities and fatty acid constituents of Achillea cappadocica Hausskn. et Bornm.

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DPPH free radical scavenging activity (inhibition. DPPH free radical scavenging activity of the extracts, α-tocopherol, and BHT. ABTS cation radical scavenging activity (inhibition. ABTS cation radical scavenging activity of the extracts, α-tocopherol, and BHT. 16 In the present work, all of the extracts were inactive against acetylcholinesterase. 20–12 mm) at 30 mg/mL concentration against E. Anticholinesterase activity of the extracts and galanthamine at 200 µ g/mL.

Initial evaluation of antioxidant and antibacterial activities of several medicinal plant extracts collected in Vietnam

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DPPH Radical Scavenging Assay. extracts were diluted into tested concentrations (0.02 and 0.1 mg/ml). Free Radical Scavenging Activity. The free radical scavenging activity of ethanolic extracts of investigated plants are shown in Figure 1. Among the extracts, the mixture of ginger and kumquat possessed the highest activity (32% and 85% at the concentration of 0.02 and 0.1 mg/ml, respectively).

Antioxidant and hypoglycemic activities of extract and fractions of Rambutan seeds

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The rambutan peel extract exhibited higher antioxidant activity than seed extracts [18], rambutan peel possessed high DPPH free radical scavenging activity (IC 50 of 8.87 μg/ml) [19], high polyphenols content of rambutan peel contributes towards high free radical scavenging activity [20].

Secondary metabolites and in vitro biological activities of fractions from stemona collinsae craib root extract

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The ethyl acetate fraction had the highest total phenolic content mg GAE/g) and total flavonoid content mg QE/g). collinsae root fractions showed moderate antioxidant activity through DPPH free radical scavenging activity. Among fractions, ethyl acetate fraction exhibited strongest DPPH free radical scavenging activity (IC μg/mL).. Antiviral and anticancer activities of Stemona collinsae. Occurrence of the insecticidal 16, 17-didehydro-16 (E)-stemofoline in Stemona collinsae.

Evaluation of the antioxidant activity and dosage of polyphenols in aqueous, hydroethanolic and hexane extracts of the bark of Spathodea campanulata P. Beauv. (Bignoniaceae)

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In Vitro evaluation of the antioxidant activity of aqueous, hydroethanolic and hexane extracts of Spathodea campanulata Free Radical Scavenging Activity. Hydrogen atom or electron donating abilities of the compounds were measured from the bleaching of the purple-colored methanol solution of 2,2-diphenyl-1-picryl hydrazyl (DPPH). This spectrophotometric assay uses the stable free radical, DPPH as a reagent (Parejo et al., 2000)..

Synthesis of E-stilbene azomethines as potent antimicrobial and antioxidant agents

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DPPH free radical scavenging activity of compounds 5a–5h was determined using BHT as a standard antioxi- dant according to a reported method. 41 Different concentrations and 100 µ g/mL) of compounds 5a–5h were prepared. where A C and A S are the absorbance of the control and sample, respectively..

A case study on in vitro investigations of the potent biological activities of wheat germ and black cumin seed oil

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The high phenolic content of the WGO may be responsible for. the antioxidant activity of WGO. Basically, the antioxidant capacity of the samples determined by the DPPH free radical scavenging activity assay is the activity of quenching free radicals, or the H-donor capability of the antioxidant.

Chemical composition and biological activities of essential oils of two new chemotypes of Glebionis Cass

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The free radical scavenging activity of the essential oils, based on the scavenging activity of the stable 1,1-diphenyl-2- picrylhydrazyl (DPPH) free radical was determined by the method described by Zou et al. The absorbance of the mixture was measured spectrophotometrically at 517 nm. where A 0 is the absorbance of the control (containing all reagents except the test compounds), and A 1 is the absorbance of the oils/standard.

Terpenoids, essential oil composition, fatty acid profile, and biological activities of Anatolian Salvia fruticosa Mill.

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DPPH free radical scavenging activity. The free radical scavenging activity of the samples was determined by the DPPH assay. Determination of the antioxidant activity with the β -carotene bleaching method. Measurement of superoxide anion radical scavenging activity of the samples was based on the standard method with slight modification. The ferric reducing power of the samples was determined according to the iron(III) reductive assay.

Antioxidant activity and hepatoprotective effect of pomegranate peel and whey powders in rats

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The ability of the PPP methanolic extract to scavenge 1,1-di- phenyl-2-picrylhydrazyl radical (DPPH) free radicals were determined by the method described by Singh et al. While, the free radical scavenging activity of the whey powder aqueous extract was determined according to the method of Kennedy et al. The animals were fed on basal diet according to AIN-93 guidelines (Reeves et al., 1993) and were provided with water ad libitum during the experimental period..

Anticholinesterase furocoumarins from Heracleum platytaenium, a species endemic to the Ida Mountains

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Antioxidant activity. The free radical scavenging activity of the extracts and the isolates from H. Determination of the antioxidant activity with the β -carotene bleaching method. The antioxidant activity of the extracts and isolates from H. Anticholinesterase activity. This study was a part of the master thesis of D

Synthesis of 2-substituted 8-propargyloxyquinoline derivatives and determination of their antioxidant, antibacterial, and DNA binding activities

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The ground state energy value difference between 3 and 3-T and that of 7 and 8 is 5.2 J/mol and 7.8 J/mol, respectively.. 30 The decrease in absorbance caused by the reduction of DPPH in the medium is used to assess antioxidant activity. Compounds 1 (46.5%) and 7 (24.4%) exhibited remarkable activity at a concentration of 500 µg/mL, while other compounds did not show significant free radical scavenging activity.

Modeling and optimizing microwave-assisted extraction of antioxidant compounds from marigold (Calendula officinalis L.) using response surface methodology

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In the literature, many studies have investigated the total flavonoid content (TFC), free radical scavenging activity (RSA), and total phenolic content (TPC) of marigold species using various extraction techniques [1,6,7].. Fatima et al. [8] determined the antioxidant capacity, RSA, UV-hydrogen peroxide-induced DNA damage protection activity, and antimicrobial properties of the ethanolic extract of flowers of Calendula officinalis.. Zeinsteger et al. [9] reported that Calendula officinalis L.

Schiff base of isoniazid and ketoprofen: synthesis, X-ray crystallographic, spectroscopic, antioxidant, and computational studies

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Key words: Isoniazid and ketoprofen Schiff base, X-ray diffraction, density functional theory studies, molecular docking, free radical scavenging activity. 1 − 3 Furthermore, oxidation reaction results in degradation of the drugs, reducing their shelf life as well as their concentration in blood..

A review on ethnobotany and promising pharmacological aspects of an endangered medicinal plant, Curcuma caesia Roxb.

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Rajamma et al.. (2012) reported the antioxidant activity of the oleoresin isolated from C. caesia with IC 50 value of 0.32 mg and a significant correlation of the total phenolic content and the antioxidant properties was noted. caesia leaf reported that the free radical scavenging activity and the reducing power activity of the leaf essential oil increases with the increasing concentration.

Synthesis, molecular docking, and pharmacological evaluation of halobenzodithiophene derivatives against alpha-glucosidase, urease, and free radical production

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Free-radical–scavenging activity (IC 50 ) of com- pound 2.. Montreal, QC, Canada) was employed to analyze binding sites of the target (alpha-glucosidase).

Magnetite nanoparticles−based hydroxyl radical scavenging activity assay of antioxidants using N, N-dimethyl-p-phenylenediamine probe

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A novel easy and low-cost DMPD-based ROS scavenging activity method was developed with the aid of Fe 3 O 4 NPs having peroxidase-like activity. MNPs catalyzed the degradation of H 2 O 2 to ROS (mainly hydroxyl radicals) which in turn converted DMPD to a colored radical cation, and antioxidants (when present) quenched • OH, thereby causing a decrement in the DMPD.

Antioxidant properties of water-soluble phthalocyanines containing quinoline 5-sulfonic acid groups

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In this work, we used the DPPH free radical scavenging method to evaluate the antioxidant potential of the synthesized Pc compounds. The descending order of radical scavenging activity of the tested Pc compounds was 6 >. The Pc compounds showed lower DPPH activity in comparison to the known Trolox and BHT standards (Figure 1). The DPPH scavenging activities of metal-free Pc compounds were also measured.

Anti-radical properties of the aqueous extract from the trunk bark of crateva adansonii (Capparaceae) and their role in the Inhibition of α-amylases and α-glucosidases Activities during the Carbohydrate Digestion

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The evaluation of the antioxidant activity was carried out using DPPH°, ABTS°+ and FRAP tests, which are the most widely used tests due to their simplicity and reproducibility. The results show that the extract has a concentration-dependent anti-radical activity.. For radical scavenging activity using the DPPH°, ABTS+° and FRAP assays, strong anti-free radical activity was recorded for both Vitamin C and the extract.

Antioxidant potential and secondary reactivity of bis{diphenyl(2-pyridyl)phosphino}copper(II) complex

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Free radical scavenging activity (DPPH) of compounds 1 and 3b.. Absorption spectra of DPPH in the absence and in the presence of compound 1. The arrow shows the change in the spectra on increasing the concentration of the compound.. Color change of DPPH radical scavenging activity of compound 1. the concentration of compound 1 increases from right to left ppm).. The M-Cl functionality in the complex is easily replaceable with an anionic ligand like dithiocarbamate.