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120 results for “antioxidant activity”
Phytochemical Screening, Antioxidant and Antimicrobial Activity of Fabric Coated with Catharanthus Roseus Ethanolic Flowers Extract
<p>The aim of the present study was to evaluate the free radical scavenging and antimicrobial activity of fabric coated of the Catharanthus Roseus. Ethanol flowers extract. Free radical scavenging was determined by using 1, 1-diphenyl-2-picrylhydrazyl (DPPH), Reducing power, Hydroxyl radical scavenging assay and antimicrobial activity of Staphylococcus aureus, Escherichia coli and standard drug of Streptomycin using disc diffusion method. This inhibition was observed with the individual extracts and when they were used in lower concentrations with ineffective antibiotics. The present investigation clearly indicates that the Catharanthus Roseus possesses antioxidant properties and serve as free radical inhibitors or scavengers, acting possibly as primary antioxidants.</p><p>Keywords</p><p>Catharanthus Roseus, Fabric coated, DPPH, Staphylococcus aureus Escherichia coli, Streptomycin, Antioxidant,</p>
Activity of antioxidant enzymes and lipid peroxidation of soybean plants treated with five Diaporthe species
<p>Absorbance data from spectrophotometric measurements of catalase, reduced glutathion, lipid peroxidation and superoxide-dismutase of soybean cv. Sava plants infected with five <em>Diaporthe</em> species (i.e. <em>D. aspalathi</em>, <em>D. caulivora</em>, <em>D. eres</em>, <em>D. gulyae</em>, <em>D. longicolla</em>).</p> <p>Supplementary data to the publication Petrovic et al. (2023) The biochemical response of soybean cultivars infected by <em>Diaporthe</em> species complex. Plants 12, 2896. https://doi.org/10.3390/plants12162896</p>
Publication & Supplementary data: Pro-health compounds and antioxidant activity of 65 potato cultivars
<p>Metadata (climatic conditions, list of varieties, field plan, etc.) and data (carotenoid content, vitamin C content, radical scavenging activity DPPH and FRAP, yellow index) related to the paper of Tatarowska et al., "The content of total carotenoids, vitamin C and antioxidant properties of 65 potato cultivars characterised under the European project ECOBREED" published in Int. J. Mol. Sci. 24 (2023), 11716.</p>
Dataset from the analysis of biological activity of endophytic strain Serratia quinivorans KP32, the expression of biocontrol-related genes and the activity of antioxidant enzymes in bacterial cells treated with pathogenic fungi filtrates
<p>This dataset contains the data from the analyses published in the article entitled "Genetic Determinants of Antagonistic Interactions and the Response of New Endophytic Strain <i>Serratia quinivorans</i> KP32 to Fungal Phytopathogens" in the International Journal of Molecular Sciences (https://doi.org/10.3390/ijms232415561). The data consist of results collected for studies on the antifungal activity of KP32 strain towards four fungal phytopathogens, results of primer efficiency determination and studies on the expression of genes potentially involved in biocontrol after treatment of KP32 strain with the fungal phytopathogens filtrates. Additionally, absorbances from activity tests for catalase (CAT) and superoxide dismutase (SOD) in the strain treated with fungal pathogens are included.</p>
Fig. 1 in Antioxidant activity of bee products added to water in tebuconazole-exposed fish
Fig. 1. Levels of TBARS (nmol MDA mg-1 protein) and GSH (µmol GSH g-1 of wet tissue) in Rhamdia quelen after exposure to 16.6% of LC 50 of tebuconazole, to bee product, and to tebuconazole + bee product for 96 h. Different small letters indicates statistical differences between the means (ANOVA followed by Tukey´s multiple range test). Mean ± SEM; n = 10. * P <0.05.
Ir and NMR for article Synthesis and Biological Activity Evaluation of New Isatin-Gallate Hybrids as Antioxidant and Anticancer Agents (in vitro) and In-silico Study as Anticancer Agents and Coronavirus Inhibitors
<p>this is IR and NMR data for article titled <strong>Synthesis and Biological Activity Evaluation of New Isatin-Gallate Hybrids as Antioxidant and Anticancer Agents (<em>in vitro</em>) and In-silico Study as Anticancer Agents and Coronavirus Inhibitors </strong></p> <p> </p>
Figure 2 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark
Figure 2. HPLC-PDA chromatographic profiles (λ = 254 nm) of: (A) sample extract; (B) gallic acid standard; (C) catechin standard; and (D) epicatechin standard, followed by UV spectra (190-400 nm).
Figure 1 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark
Figure 1. Erythrocyte hemolysis in a 5% red blood cell suspension by the hydroethanolic extract of A. peregrina stem bark. (A) 5% suspension of red blood cells; (B) hemolysis after 1 min of reaction; (C) advanced hemolysis after 5 min; and (D) completely hemolyzed red blood cells within 10 min of reaction. Bars: At (A) 1.000×; (B) 500×; (C) 650×; and (D) 1.800×.
Extraction, Chemical Characterization and Antioxidant Activity of Bioactive Plant Extracts
<p>Recording of the talk “Extraction, chemical characterization and antioxidant activity of bioactive plant extracts”, presented by Beatriz Nunes Silva at the 1st International Electronic Conference on Food Science and Functional Foods; MDPI Foods. Online virtual meeting (10-25 Nov 2020).</p>
Hop Flower Supercritical Carbon Dioxide Extracts Coupled with Carriers with Solubilizing Properties—Antioxidant Activity and Neuroprotective Potential
<p>Article, Dataset for article</p> <p> </p> <h1>Hop Flower Supercritical Carbon Dioxide Extracts Coupled with Carriers with Solubilizing Properties—Antioxidant Activity and Neuroprotective Potential</h1> <p> </p> <h2>Abstract</h2> <div><span>Lupuli flos</span> shows many biological activities like antioxidant potential, extended by a targeted effect on selected enzymes, the expression of which is characteristic for neurodegenerative changes within the nervous system. <span>Lupuli flos</span> extracts (LFE) were prepared by supercritical carbon dioxide (scCO<sub>2</sub>) extraction with various pressure and temperature parameters. The antioxidant, chelating activity, and inhibition of acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and tyrosinase by extracts were studied. The extracts containing ethanol were used as references. The most beneficial neuroprotective effects were shown by the extract obtained under 5000 PSI and 50 °C. The neuroprotective effect of active compounds is limited by poor solubility; therefore, carriers with solubilizing properties were used for scCO<sub>2</sub> extracts, combined with post-scCO<sub>2</sub> ethanol extract. Hydroxypropyl-β-cyclodextrin (HP-β-CD) in combination with magnesium aluminometasilicate (Neusilin US2) in the ratio 1:0.5 improved dissolution profiles to the greatest extent, while the apparent permeability coefficients of these compounds determined using the parallel artificial membrane permeability assay in the gastrointestinal (PAMPA GIT) model were increased the most by only HP-β-CD.</div> <div> <div> <div>Keywords: </div> <a href="https://www.mdpi.com/search?q=neuroprotection">neuroprotection</a>; <a href="https://www.mdpi.com/search?q=hop+strobile">hop strobile</a>; <a href="https://www.mdpi.com/search?q=inhibition+of+enzymes">inhibition of enzymes</a>; <a href="https://www.mdpi.com/search?q=xanthohumol">xanthohumol</a></div> </div>
Determining Antioxidant Activity of Cannabis Leaves Extracts from Different Varieties—Unveiling Nature's Treasure Trove
<p>Article, Dataset for article</p> <p> </p> <h1>Determining Antioxidant Activity of Cannabis Leaves Extracts from Different Varieties—Unveiling Nature’s Treasure Trove</h1> <p> </p> <h2>Abstract</h2> <div>Cannabis leaves contain a diverse range of antioxidants, including cannabinoids, flavonoids, and phenolic compounds, which offer significant health benefits. Utilising cannabis leaves as a source of antioxidants presents a cost-effective approach because they are typically discarded during the cultivation of cannabis plants for their seeds or fibres. Therefore, this presented study aimed to assess the antioxidant activity of the leaves of selected hemp cultivars, such as Białobrzeska, Tygra, and Henola, based on the results obtained with the 2,2′-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid, ferric reducing antioxidant power, cupric reducing antioxidant capacity, and 2,2-Diphenyl-1-picrylhydrazyl assays. The cannabinoid profile was analysed for the antioxidant activity to the contents of cannabidiol (CBD), cannabigerol (CBG), Δ<sup>9</sup>-tetrahydrocannabinol (Δ<sup>9</sup>-THC), and cannabichromene (CBC), determined based on chromatographic assays. The following variables were tested: the impact of various extractants (methanol, ethanol, and isopropanol), and their mixtures (50:50, <span>v/v</span>, as well as extraction methods (maceration and ultra-sound-assisted extraction) significant in obtaining hemp extracts characterised by different cannabinoid profiles. The results revealed that the selection of extractant and extraction conditions significantly influenced the active compounds’ extraction efficiency and antioxidant activity. Among the tested conditions, ultrasound-assisted extraction using methanol yielded the highest cannabinoid profile: CBD = 184.51 ± 5.61; CBG = 6.10 ± 0.21; Δ9-THC = 0.51 ± 0.01; and CBC = 0.71 ± 0.01 μg/g antioxidant potential in Białobrzeska leaf extracts.</div> <div> <div> <div>Keywords: </div> <a href="https://www.mdpi.com/search?q=Cannabis+sativa"><span>Cannabis sativa</span></a>; <a href="https://www.mdpi.com/search?q=antioxidant">antioxidant</a>; <a href="https://www.mdpi.com/search?q=cannabidiol">cannabidiol</a>; <a href="https://www.mdpi.com/search?q=cannabigerol">cannabigerol</a>; <a href="https://www.mdpi.com/search?q=oxidative+stress">oxidative stress</a></div> </div>
Changes in Phytochemical Composition and Antioxidant Activity in Nine sh2 Sweet Corn Genotypes during Maturation
<p>Table S1. Mean values ± SD of four biological replicates for the five evaluated traits across nine <em>sh2 </em>sweetcorn hybrids and the five maturity stages. Different lowercase letters as well as different uppercase letters indicate a significant difference at P < 0.05.</p>
Table 3 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark
<p><b>Table 3.</b> Diameter of the inhibitory zone of the hydroethanolic extract of <i>Anadenanthera peregrina</i> stem bark against <i>Staphylococcus aureus</i> (ATCC 25923) and <i>Escherichia coli</i> (ATCC 25922).</p><table><tbody><tr><th></th><th><b>A. peregrina extract concentration</b></th><th></th><th></th></tr></tbody><tbody><tr><th><b>Strain</b></th><td></td><td></td><td></td><td><b>C +</b></td><td><b>C -</b></td></tr><tr><th></th><td><b>50 µL</b></td><td><b>100 µL</b></td><td><b>200 µL</b></td><td></td><td></td></tr><tr><th><i>E. coli</i></th><td>-</td><td>-</td><td>-</td><td>29 mm</td><td>-</td></tr><tr><th><i>S. aureus</i></th><td>10 mm</td><td>16 mm</td><td>20 mm</td><td>35 mm</td><td>-</td></tr></tbody></table>
Table 2 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark
<p><b>Table 2.</b> Physicochemical properties,antioxidant activity,and total phenolic content of the hydroethanolic extract of <i>A.peregrina</i> stem bark.</p><table><tbody><tr><th>Sample</th><th>pH</th><th>Density (g cm 3)</th><th>DPPH (IC 50)</th><th><b>Total Phenolics (g GAE 100 g-</b> 1)</th></tr></tbody><tbody><tr><th><b>A. peregrina extract</b></th><td>5.21 ± 0.01</td><td>0.956</td><td>44.13 mg mL-1</td><td>6.40 ± 0.08</td></tr></tbody></table>
Table 1 in Phytochemical characterization, and antioxidant and antibacterial activities of the hydroethanolic extract of Anadenanthera peregrina stem bark
<p><b>Table 1.</b> Phytochemical prospecting of the main secondary metabolite groups of the hydroethanolic extract of <i>A. peregrina</i> stem bark.</p><table><tbody><tr><th><b>Secondary metabolite</b></th><th><b>Hydroethanolic extract of A. peregrina</b></th></tr><tr><th><b>Cardiac glycosides</b></th></tr></tbody><tbody><tr><th>Kedd reagent test</th><td>++</td></tr><tr><th>Keller–Kiliani reagent test</th><td>++</td></tr><tr><th>Baljet reagent test</th><td>-</td></tr><tr><th>Raymond–Marthoud reagent test</th><td>+++</td></tr><tr><th><b>Alkaloids</b></th></tr><tr><th>Libermann–Bouchardat reagent test</th><td>-</td></tr><tr><th>Wagner reagent test</th><td>-</td></tr><tr><th>Mayer’s reagent test</th><td>-</td></tr><tr><th><b>Organic acids</b></th></tr><tr><th>Pascová reagent test</th><td>++</td></tr><tr><th><b>Reducing sugars</b></th></tr><tr><th>Fehling reagent test</th><td>++</td></tr><tr><th><b>Non-reducing sugars</b></th></tr><tr><th>Fehling + HCl test</th><td>-</td></tr><tr><th><b>Coumarins</b></th></tr><tr><th>UV light 254 and 365 nm</th><td>+</td></tr><tr><th><b>Saponins</b></th></tr><tr><th>Foamy</th><td>-</td></tr><tr><th>Haemolytic</th><td>+++</td></tr><tr><th><b>Polysaccharides</b></th></tr><tr><th>Reactive lugol</th><td>-</td></tr><tr><th><b>Phenols</b></th></tr><tr><th>FeCl 3 <b>Tannins</b></th><td>+++</td></tr><tr><th>FeCl3 <b>Flavonoids</b></th><td>Gr</td></tr><tr><th>Pb(C2 H 3O2)2</th><td>++</td></tr><tr><th><b>Purines</b></th><td><b>-</b></td></tr><tr><th><b>Catechins</b></th><td>+++</td></tr><tr><th><b>Benzoquinone derivatives</b></th><td>+++</td></tr><tr><th><b>Depsids and depsidones</b></th><td>+++</td></tr><tr><th><b>Steroids and triterpenoids</b></th><td><b>-</b></td></tr><tr><th><b>Sesquiterpenolactones</b></th><td>-</td></tr></tbody></table>
Green synthesis of ZnO nanoparticles using Cocos nucifera leaf extract: Characterization, antimicrobial, antioxidant, and photocatalytic activity
<p>Zinc oxide nanoparticles (ZnO NPs) have been successfully prepared using <em>Cocos nucifera</em> leaf extract and investigated with their antimicrobial, antioxidant, and photocatalytic activity. The structural, compositional, and morphological properties of the NPs were recorded and studied systematically to confirm the synthesis. The aqueous suspension of NPs showed a UV-Vis. absorption maxima of 370 nm indicating primarily its formation. The XRD analysis identified the NPs with hexagonal wurtzite structure with an average particle size of 16.6 nm. The FTIR analysis identified some biomolecules and functional groups in the leaf extract as responsible for the encapsulation and stabilization of ZnO NPs. The EDX analysis showed the desired elemental compositions in the material. A flower-shaped morphology of ZnO NPs was observed by SEM with a grain size of around 15 nm. The optical properties of the NPs were studied by UV-Vis spectroscopy and the bandgap was calculated as 3.37 eV. The Prepared ZnO NPs have demonstrated antimicrobial activity against <em>T. harzianum</em>, and <em>S. aureus</em> with a ZOI (zone of inhibition) of 14 and 10 mm, respectively. The photocatalytic behavior of ZnO NPs showed absorbance degradation at around 640 nm and discolored methylene blue dye after one hour with a degradation maximum of 84.29 %. Thus, the prepared ZnO NPs could be used potentially in antibiotic development, pharmaceutical industries, and as photocatalysts. </p>
Data from: Impact of short- and long-duration thermal stress on antioxidant enzyme activity in Parthenium beetles
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Green synthesis of ZnO nanoparticles using Cocos nucifera leaf extract: Characterization, antimicrobial, antioxidant, and photocatalytic activity
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Characterization, functional properties and antioxidant activities of macromolecular extracts isolated from Porphyra yezoensis
<p><em>Porphyra yezoensis</em> is one of the most economical seaweed species in China. Determining how to make full use of mature <em>P. yezoensis </em>and exploring new ways to increase the value of its resources are important subjects of research for the development of the laver breeding industry. In this study, we provide a simple method to comprehensively extract the bioactive substances from <em>P. yezoensis</em>. The characteristics, functional properties and antioxidant activities of two types of biopolymer extract from <em>P. yezoensis</em> were studied and analyzed relatively. Based on the characterization of water-soluble concentrate (WPC) and alkali-soluble concentrate (APC), obtained via chemical analysis, FT-IR, TGA and differential scanning calorimetry (DSC), they both had typical polysaccharide and protein characteristics and steady composition. APC showed higher nitrogen solubility, water holding capacity and foaming ability. APC could not only be used as a protein supplement; it also performs well in improving the properties of foods in terms of water-holding and fat-absorption. The emulsifying activity and oil-holding capacity of WPC were observed to be higher than those of APC; thus, WPC has the potential to be used as an emulsifier. Surprisingly, WPC and APC have radical scavenging capacity in vitro, which broadens the direction of their application.</p>
Resveratrol loaded chitosan-pectin core-shell nanoparticles as novel drug delivery vehicle for sustained release and improved antioxidant activities
<p><span>Resveratrol, chemically known as 3, 5, 4'-trihydroxy-trans-stilbene, is a natural polyphenol with promising multi-targeted health benefits. The optimal therapeutic uses of resveratrol are limited due to its poor solubility, rapid metabolism and low bioavailability. To address the issues, we have encapsulated resveratrol inside the nanosized core made of chitosan and coated this core with pectin - shell in order to fabricate a drug delivery vehicle which can entrap resveratrol for a longer period of time. The core - shell nanoparticles fabricated in this way were characterized with the help of Fourier Transform Infrared Spectrometer (FTIR), Field Emission Scanning Electron Microscope (FESEM), Field Emission Transmission electron microscopy/Selected Area Electron Diffraction (FETEM/SAED), High-Resolution Transmission Electron Microscope (HRTEM)), Dynamic Light Scattering (DLS) and Zeta Potential measurements. In vitro drug release study showed the ability of the core-shell nanoparticles to provide sustained release of resveratrol for almost 30 hours. The release efficiency of the drug was found to be pH dependent and a sequential control over drug release can be obtained varying the shell thickness. The resveratrol encapsulated in a nanocarrier was found to have a better in vitro antioxidant activity than free resveratrol as determined by DPPH radical scavenging method. This work finally offers a novel nano-based drug delivery system.</span></p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.