Filtry
wszystkich: 712
wybranych: 542
Wyniki wyszukiwania dla: ANTIOXIDANT CAPACITIES
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Antioxidants: a premature scientific hypothesis that reshuffled the traditional food pyramid
PublikacjaAntioxidants present in substantial amounts in foods, plant-based products in particular, have been suggested as chemopreventive agents that can curb the development of undesirable health effects caused by oxidative stress simply by enriching diet in such compounds. This idea has been enthusiastically accepted by consumers, as well as food and pharmaceutical industry, and created great demand for products containing antioxidant...
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Highly efficient conversion of waste plastic into thin carbon nanosheets for superior capacitive energy storage
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An Aqueous Exfoliation of WO3 as a Route for Counterions Fabrication—Improved Photocatalytic and Capacitive Properties of Polyaniline/WO3Composite
PublikacjaIn this paper, we demonstrate a novel, electrochemical route of polyaniline/tungsten oxide (PANI)/WO3) film preparation. Polyaniline composite film was electrodeposited on the FTO (fluorine-doped tin oxide) substrate from the aqueous electrolyte that contained aniline (monomer) and exfoliated WO3 as a source of counter ions. The chemical nature of WO3 incorporated in the polyaniline matrix was investigated using X-ray photoelectron...
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A New Approach to Capacitive Sensor Measurements Based on a Microcontroller and a Three-Gate Stable RC Oscillator
PublikacjaA complete smart capacitive sensor solution basedA complete smart capacitive sensor solution based on a microcontroller was developed. This approach includes the development of both the hardware and software. The hardware part comprises an 8-bit microcontroller equipped with two timers/counters and a three-gate stable RC relaxation oscillator. The software part handles system configuration, measurement control, communication control,...
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A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor
PublikacjaThis article deals with the development of capacitive voltage divider for high voltage measurements and presents a method of analysis and optimization of its parameters. This divider is a part of a combined voltage and current sensor for measurements in high voltage power networks. The sensor allows continuous monitoring of the network distribution status and performs a quick diagnosis and location of possible network failures....
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Lipid mediators involved in the oxidative stress and antioxidant defence of human lung cancer cells
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Characteristic of antioxidant activity of dry-cured pork loins inoculated with probiotic strains of LAB
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Role of Litsea cubeba Essential Oil in Agricultural Products Safety: Antioxidant and Antimicrobial Applications
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Antimicrobial and antioxidant activities of Cinnamomum cassia essential oil and its application in food preservation
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Analysis of antioxidant capacity and polyphenol content of Goji fruit products available on the European market
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Ginsenoside and phenolic compounds in hydromethanolic extracts of American ginseng cell cultures and their antioxidant properties
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Comparison of bioactive compounds, antioxidant and antiproliferative activities of Mon Thong durian during ripening
PublikacjaCelem przeprowadzonych badań było oszacowanie zmian zawartości związków odżywczych, związków bioaktywnych, kwasów tłuszczowych oraz przeciwutleniaczy w owocach duriana w trakcie różnych etapów procesu dojrzewania. W badaniach wykorzystano testy CURRAC, DPPH, ABTS i FRAP. Stwierdzono, że całkowita zawartość polifenoli, flawonoidów, kwasu askorbimowego, tanin oraz poziom aktywności przeciwutleniającej jest dla owoców niedojrzałych,...
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A comparative study of phenolic compounds and antioxidant and antiproliferative activities in frequently consumed raw vegetables
PublikacjaCelem badań było oszacowanie właściwości przeciwutleniających wybranych warzyw spożywczych w stanie surowym: czosnek (Allium sativum L), biała, żółta i czerwona cebula (Allium cepa L), czerwony i zielony pieprz (Capsicum annuum L.) oraz biała kapusta (Brassica oleracea var. capitata f. alba) zbieranych w ciągu tego samego roku z różnych regionów geograficznych i stref klimatycznych. W badaniach odpowiednich ekstraktów metanolowych...
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Variability of Hordeum vulgare L. Cultivars in Yield, Antioxidant Potential, and Cholinesterase Inhibitory Activity
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Supplementation with antioxidant vitamins prevents oxidative modification of DNA in lymphocytes of HIV-infected patients
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Chemical Composition and Antioxidant Properties of Powders Obtained from Different Plum Juice Formulations
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EDS1-Dependent Cell Death and the Antioxidant System in Arabidopsis Leaves is Deregulated by the Mammalian Bax
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Sperm Antioxidant Biomarkers and Their Correlation with Clinical Condition and Lifestyle with Regard to Male Reproductive Potential
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Mineral Composition and Antioxidant Potential in the Common Poppy (Papaver rhoeas L.) Petal Infusions
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Lobularia libyca: Phytochemical Profiling, Antioxidant and Antimicrobial Activity Using In Vitro and In Silico Studies
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An In Vitro Antimicrobial, Anticancer and Antioxidant Activity of N–[(2–Arylmethylthio)phenylsulfonyl]cinnamamide Derivatives
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Selenium and mercury concentrations, Se:Hg molar ratios and their effect on the antioxidant system in wild mammals
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Structural, physico-chemical and antioxidant characteristics of 2,2′-bipyridyl(iminodiacetato)oxidovanadium(IV) dihydrate
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CEACAM6 as a Novel Therapeutic Target to Boost HO-1—mediated Antioxidant Defense in COPD
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In vitro antioxidant, anti-inflammatory activities and acetylcholinesterase inhibition properties of selected plant extracts
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In Vitro Antiproliferative and Antioxidant Effects of Extracts from Rubus caesius Leaves and Their Quality Evaluation
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Determination of phytochemical composition and antioxidant capacity of 22 old apple cultivars grown in Poland
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Identification of antioxidant polyphenolics from Jasione montana based on a preliminary LC-MS profiling
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Assessment of Lipophilicity Indices Derived from Retention Behavior of Antioxidant Compounds in RP-HPLC
PublikacjaReverse phase high pressure liquid chromatography was employed in order to evaluate the lipophilicity of antioxidant compounds from different classes, such as phenolic acids, flavanones, flavanols, flavones, anthocyanins, stilbenes, xantonoids, and proanthocyanidins. The retention time of each compound was measured using five different HPLC columns: RP18 (LiChroCART, Purosphere RP-18e), C8 (Zorbax, Eclipse XDBC8), C16-Amide (Discovery...
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The effect of convective heating and microwave heating on antioxidant enzymes in pooled mature human milk
PublikacjaThe effects of convective and microwave heating at constant temperature (62.5, 66 and 70 °C) on the activity of antioxidant enzymes (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase, GPx) in pooled mature human milk were compared. Activities of the enzymes were determined using spectrophotometric kits. Activity of GPx decreased significantly in the first stage of heating when milk samples were warmed to pasteurisation...
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Nutritional and Pharmaceutical Properties of Bioactive Compounds in Organic and Conventional Growing Kiwifruit
PublikacjaThe bioactivity of two kiwifruit’s cultivars growing under organic and conventional conditions were studied and compared. The bioactive compounds were extracted with water and ethanol using similar conditions which are applied in pharmaceutical applications and for daily fruit consumption such as tea drink. Antioxidant radical scavenging assays [ferric-reducing/antioxidant power (FRAP); cupric reducing antioxidant capacity (CUPRAC);...
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Identification of Polyphenols from Coniferous Shoots as Natural Antioxidants and Antimicrobial Compounds
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EFFECT OF ANTIOXIDANTS ON THE STABILITY OF PITCH- BASED POLYMER TO THERMO-OXIDATIVE ACTION
PublikacjaThe influence of stabilizers – hydrogen donors – on the processes of thermooxidative destruction of pitch-based polymer has been investigated. It is shown that Irganox has not stabilizing effect on pitch-based polymer and melamine slightly retards the destructive process. A mixture of melamine and Irganox exhibits synergetic stabilizing effect and at the optimum ratio it can be used to prevent unwanted thermooxidative processes...
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High yield conversion of biowaste coffee grounds into hierarchical porous carbon for superior capacitive energy storage
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Waste-derived stable carbon electrodes for capacitive deionization using poly (vinyl alcohol)-glutaraldehyde as binder
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Chicken feather-derived carbon electrodes for capacitive deionization using poly(vinyl alcohol)-glutaraldehyde as the binder
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Magnetic and capacitive couplings influence on power losses in double circuit high voltage overhead transmission line
PublikacjaPurpose – The paper aims to discuss problems of power and energy losses in a double-circuit overhead transmission line. It was observed from energymeters’ readings, that in such a line, active power losses can be measured as “negative”. The “negative” active power losses appear when the active power injected to the circuit is lower than the active power received at the circuit end. The purpose of this paper is to explain this phenomenon. Theoretical...
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A measurement method for lossy capacitive relative humidity sensors based on a direct sensor-to-microcontroller interface circuit
PublikacjaA new time-domain measurement method for determining the capacitance and resistance values of lossy relative humidity capacitive sensors is presented. The method is based on a direct sensor-to-microcontroller interface for microcontrollers with internal analog comparators and timers. The interface circuit consists only of four reference resistors (two reference resistors if a microcontroller includes a voltage reference source),...
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Comparison of Antioxidant Activity of Protein Isolates Derived from Selected Dry-Cured Meat Products
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Effect of Marination Time on the Antioxidant Properties of Peptides Extracted from Organic Dry-Fermented Beef
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PARTIAL WHEAT FLOUR REPLACEMENT WITH GLUTEN-FREE FLOURS IN BREAD - QUALITY, TEXTURE AND ANTIOXIDANT ACTIVITY
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Thermal processing of pasta enriched with black locust flowers affect quality, phenolics, and antioxidant activity
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Antibacterial and antioxidant activity of the secondary metabolites from in vitro cultures of alice sundew (drosera aliciae)
PublikacjaRośliny owadożerne (D. aliciae) produkują metabolity wtórne, farmakologicznie czynne substancje. Na wzrost akumulacji tychże substancji w tkankach roślin owadożernych ma wpływ dodatek elicytora. W pracy przedstawiono zarówno optymalizacje warunków hodowli roślin, jak również prawdopodobne mechanizmy działania bakteriobójczego. Końcowego oznaczenia zawartości metabolitów w ekstraktach roślinnych dokonano techniką chromatografii...
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The Physicochemical, Antioxidant, and Color Properties of Thin Films Based on Chitosan Modified by Different Phenolic Acids
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The Antioxidant Properties of Selected Varieties of Pumpkin Fortified with Iodine in the Form of Potassium Iodide and Potassium Iodate
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Biosynthesis of zinc oxide nanoparticles with antimicrobial, anticancer, antioxidant and photocatalytic activities by the endophytic Alternaria tenuissima
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In Vitro Screening for Anti-Acetylcholinesterase and Antioxidant Activities of Hottonia palustris L. Extracts and Their Unusual Flavonoids
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LC–MS/MS analysis, antioxidant and anticholinergic properties of galanga (Alpinia officinarum Hance) rhizomes
PublikacjaGalanga (Alpinia officinarum Hance) is a pungent and aromatic rhizome, which is a member of the ginger family (Zingiberaceae). The rhizomes of this plant have been used as a traditional medicine in far east countries for relieving stomach ache, invigorating the circulatory system, treating colds, and reducing swelling. The aim of this study was to investigate antioxidant and anticholinergic properties of galanga. For this purpose,...
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Uncertainty of antioxidant profiling in complex mixtures using liquid chromatography involving post-column derivatisation
PublikacjaThe main goal of this paper is to discuss the problems associated with antioxidant profiling in complex samples using a high-throughput HPLC system coupled with post-column derivatisation reactor. Based on the experimental data reported in the literature, we demonstrated that improper optimisation of temperature and/or pH assay conditions performed using an on-line derivatisation reactor may substantially change the antioxidant...
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Interactions between bioactive components determine antioxidant, cytotoxic and nutrigenomic activity of cocoa powder extract
PublikacjaNumerous studies have shown, rather disappointingly, that isolated bioactive phytochemicals are not as biologically effective as natural plant products. Such a discrepancy may be explained by the concept of food synergy, which was verified in this research for cocoa extract versus its major components with regard to cancer chemoprevention. The evaluation embraced the relationship between redox properties evaluated in cell-free systems...