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Search results for: chemical hydrogen storage
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Optimization of the Relative Humidity of Reactant Gases in Hydrogen Fuel Cells Using Dynamic Impedance Measurements
PublicationWater management is a key factor affecting the efficiency of proton exchange membrane fuel cells (PEMFCs). The currently used monitoring methods of PEMFCs provide limited information about which processes or components that humidity has a significant impact upon. Herein, we propose the use of a novel approach of impedance measurements using a multi-sinusoidal perturbation signal, which enables impedance measurements under dynamic...
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Determination of carbon monoxide, methane and carbon dioxide in refinery hydrogen gases and air by gas chromatography
PublicationW pracy przedstawiono metodę oznaczania śladowych zawartości tlenku węgla, metanu oraz dwutlenku węgla w rafineryjnych gazach wodorowych oraz powietrzu; granica oznaczalności metody wynosi odpowiednio 0,15, 0,15 oraz 0,20 mikro-gram/litr. Zaprezentowano w pracy prostą modyfikację chromatografu gazowego wyposażonego w detektor płomieniowo-jonizacyjny (FID). Zastosowano kolumnę typu PorapakQ, dodatkowo połączono szeregowo z krótką...
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Supramolecular Assemblies of Hydrogen Bonded Carboxylic Acid Dimers Mediated by Phenyl-Pentafluorophenyl Stacking Interactions.
PublicationKwas pentafluorobenzoesowy tworzy heterodimery z kwasami benzoesowym i 2,4,6-trimetylobenzoesowym w wyniku oddziaływań typu pi-pi reszt fenylowych i pentafluorofenylowych. Otrzymane kokryształy wymienionych kwasów z 1,4-bisarylobutadiynami zawierały homodimery tworzone przez cząsteczki kwasów, pomiędzy którymi znajdowały się cząsteczki diarylodiacetylenów.
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AN EXPERIMENTAL STUDY OF THE PHOTOCATALYTIC HYDROGEN PRODUCTION IN THE LABORATORY-SCALE SET-UP DEPENDING ON THE PROCESS CONDITIONS
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A spectroscopic study into the decomposition process of titanium isopropoxide in the nitrogen–hydrogen 100kHz low-pressure plasma
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Resistance changes of carbon nanotubes decorated with platinum nanoparticles in the presence of hydrogen at different and constant concentrations
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Role of nitrogen in optical and electrical band gaps of hydrogenated/hydrogen free carbon nitride film
PublicationWe report the optical and electrical band gap energy of amorphous hydrogenated carbon nitride (a-HCNx) and carbon nitride (a-CNx) as a function of nitrogen concentration (N/C). The optical band gap of a-HCNx and a-CNx films has been determined by means of Ellipsometry and UV-VIS. Both optical and electrical band gaps increase with elevated nitrogen concentration. Experimentally obtained electrical band gap is compared with the...
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Mesophilic and thermophilic dark fermentation course analysis using sensor matrices and chromatographic techniques
PublicationProduction of biofuels from biomass is expected to benefit the society and the environment. At present, bio waste residues processing includes hydrolysis, dark fermentation, photofermentation, pyrolysis, gasification, and chemical synthesis. As the composition and the chemical structure of organic substances affect the efficiency of mentioned processes, it is believed that the glucose concentration is a crucial parameter for the...
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The influence of amorphous macrodiol, diisocyanate type and l-ascorbic acid modifier on chemical structure, morphology and degradation behavior of polyurethanes for tissue scaffolds fabrication
PublicationStudies described in this work were related to the bulk synthesis and characterization of polyurethanes (PURs) obtained with the use of cyclic 4,4′-methylene bis(cyclohexyl isocyanate) (HMDI) or linear 1,6-hexamethylene diisocyanate (HDI), amorphous α,ω-dihydroxy(ethylene-butylene adipate) macrodiol (PEBA), 1,4-butandiol (BDO) chain extender and dibutyltin dilaurate (DBTDL) catalyst. Obtained PURs were modified with l-ascorbic...
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From ashes to porous hierarchical nanocarbon electrode: Upcycling secondary waste materials through self-catalytic chemical vapour deposition
PublicationMetal and metal oxide particles are abundant in various ash-based wastes. Utilizing these as catalyst sources for the fabrication of carbon nanomaterials could present a valuable approach to reduce our reliance on non-renewable and costly catalyst sources, thereby facilitating large-scale nanomaterial production. In this context, secondary waste materials (SWMs) are by-products resulting from the (complete or partial) combustion...
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Chemical-Assisted Mechanical Lapping of Thin Boron-Doped Diamond Films: A Fast Route Toward High Electrochemical Performance for Sensing Devices
PublicationThere is an urgent need for an effective and economically viable increase in electrochemical performance of boron-doped diamond (BDD) electrodes that are used in sensing and electrocatalytic applications. Specifically, one must take into consideration the electrode heterogeneity due to nonhomogenous boron-dopant distribution and the removal of sp2 carbon impurities saturating the electrode, without interference in material integrity....
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The Impact of Long-Time Chemical Bonds in Mineral-Cement-Emulsion Mixtures on Stiffness Modulus
PublicationDeep cold in-place recycling is the most popular method of reuse of existing old and deteriorated asphalt layers of road pavements. In Poland, in most cases, the Mineral-Cement-Emulsion mixture technology is used, but there are also applications combining foamed bitumen and cement. Mineral-Cement-Emulsion mixtures contain two different binding agents – cement as well as asphalt from the asphalt emulsion. Asphalt creates asphalt...
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Effects of stressful physico-chemical factors on the fitness of the plant pathogenic bacterium Dickeya solani
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High resolution model for assessment of contamination by chemical warfare agents dumped in the Baltic Sea
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The Tribological, Physico-Chemical and Rheological Properties of Lubricating Grease Produced on Epoxy Resin Base
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Effect of chemical composition on corrosion and wear behaviour of the composite Ni-Fe-Al2O3 coatings.
PublicationPrzedstawiono wyniki badań powłoki kompozytowej otrzymanej przez osadzanie katodowe galwaniczne w roztworze zawierającym sole niklu, żelaza oraz cząstki ceramiki Al2O3 o różnej wielkości i stężeniu. Wykazano, że charakterystyka ceramiki posiada wpływ na szybkość korozji i zużycia ściernego. W szczególności, zawartość ceramiki wpływa dodatnio na odporność na zużycie ścierne, ale nieco obniża odporność na zużycie korozyjne.
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Structural, physico-chemical and antioxidant characteristics of 2,2′-bipyridyl(iminodiacetato)oxidovanadium(IV) dihydrate
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Offal Chemical Composition from Veal, Beef, and Lamb Maintained in Organic Production Systems
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Estimation of the environmental risk posed by landfills using chemical, microbiological and ecotoxicological testing of leachates
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Soil chemical properties affect the reaction of forest soil bacteria to drought and rewetting stress
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Chemical composition of edible aerial parts of meadow bistort (Persicaria bistorta (L.) Samp.)
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Matcha Green Tea: Chemical Composition, Phenolic Acids, Caffeine and Fatty Acid Profile
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PHYSICO-CHEMICAL CHARACTERISTICS OF SELECTED HONEYS OF THE WEST POMERANIAN PROVINCE AND THE VALUE OF THEIR PRO-HEALTH
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Characteristics of microstructural phenomena occurring on the surface of protective gloves by the action of mechanical and chemical factors
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Estimation of the expected effects of different surface modifications on mechanical, chemical and biological behaviour of endoprostheses
PublicationPrzedstawiono koncepcję nowej endoprotezy o szczególnie wysokiej odporności na zużycie i pękanie. Koncepcja zakada wytwarzanie wieloetapową obróbkę powierzchniową kompozytu metalowo-ceramicznego.
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BelBuk System—Smart Logistics for Sustainable City Development in Terms of the Deficit of a Chemical Fertilizers
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Chemical Composition and Antioxidant Properties of Powders Obtained from Different Plum Juice Formulations
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Effect of chemical structure and deposition method on optical properties of polyazomethines with alkyloxy side groups
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Chemical recycling of plastic waste as a mean to implement the circular economy model in the European Union
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Decision Support System to Improve the Effectiveness of Chemical Control Against Cutworms in Sugar Beet
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Chemical and Mechanical Pressure-Induced Photoluminescence Tuning via Structural Evolution and Hydrostatic Pressure
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Analysis of the application of selected physico-chemical methods in eliminating odor nuisance of municipal facilities
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Chemical modification of natural immunomodulators tuftsin and muramyl dipeptide significantly influence their biological activity
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Water and chemical input via hydrometeors in central european mountains with Szrenica Mt. as an example
PublicationZanieczyszczenia obecne w powietrzu atmosferycznym są transportowane do powierzchni ziemi przy pomocy osadów atmosferycznych. Celem pracy było przedstawienie chemizmu różnych typów osadów atmosferycznych. Badania prowadzono na szczycie góry Szrenicy. Badania prowadzono od grudnia 2008 do lutego 2010. Przedstawiono wyniki analiz przeprowadzonych dla różnego typu osadów występujących na tym terenie.
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Physico-chemical properties of three-component mixtures based on chitosan, hyaluronic acid and collagen
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Changes in Chemical Composition and Accumulation of Cryoprotectants as the Adaptation of Anholocyclic Aphid Cinara tujafilina to Overwintering
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On the Formation of Single-Walled Carbon Nanotubes in Pulsed-Laser-Assisted Chemical Vapor Deposition
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Identification of chemical pollution problems and causes in the Baltic See in relation to socio-economic drivers
PublicationOpisano możliwość wykorzystania nowego narzędzia do zintegrowanej oceny stanu środowiska w akwenie Morza Bałtyckiego. Takie możliwości stwarza narzędzie znane jako DPSIR czyli Drivers (sfery działalności człowieka będące źródłem potencjalnych zznieczyszczeń)-Pressures (ksenobiotyki i specyficzne czynniki szkodliwe emitowane do środowiska)-Stata (stann środowiska)- Impact (efekty niekorzystego oddziaływania na część ożywioną i nieożywioną...
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Quality Assurance and Quality Control in the Analytical Chemical Laboratory. A practical approach : Second edition
PublicationThe second edition defines the tools used in QA/QC, especially the application of statistical tools during analytical data treatment. Clearly written and logically organized, it takes a generic approach applicable to any field of analysis. The authors begin with the theory behind quality control systems, then detail validation parameter measurements, the use of statistical tests, counting the margin of error, uncertainty estimation,...
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Effect of glycols used as glycolysis agents on chemical structure and thermal stability of produced glycolysates
PublicationZaprezentowano warunki glikolizy poliuretanowych odpadów piankowych, przy użyciu różnych glikoli oraz wyniki badań budowy chemicznej glikolizatów oraz ich właściwości termicznych.
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Storm petrels as indicators of pelagic seabird exposure to chemical elements in the Antarctic marine ecosystem
PublicationData on trace element bioavailability in the south-polar marine ecosystem is still scarce, compared to that relating to temperate zones. Seabirds can be used as indicators of ecosystem health and sentinels of environmental pollution, constituting a link between marine and terrestrial environments. Here, we analysed the concentration of 17 elements (with special emphasis on mercury, Hg) in feathers of adults and chicks of two pelagic...
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Quality of groundwater contaminated by leachates from seven Polish landfills - chemical and ecotoxicological classifications
PublicationArtykuł prezentuje rezultaty badań toksyczności ostrej i chronicznej próbek wód podziemnych pobranych spod składowisk odpadów komunalnych. Uzyskane wyniki porównano z wynikami badań parametrów fizykochemicznych. Jednocześnie dokonano klasyfikacji jakości badanych próbek w oparciu o zalecenia Komisji Helsińskiej, system oparty na wyznaczaniu parametru pT i kryteria ustanowione przez Persoone'a i współpracowników.
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Machine Learning- and Artificial Intelligence-Derived Prediction for Home Smart Energy Systems with PV Installation and Battery Energy Storage
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DSC Phase Transition Profiles Analyzed by Control Charts to Determine Markers for the Authenticity and Deterioration of Flaxseed Oil during Storage
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The influence of harvest maturity and basic macroelement content in fruit on the incidence of diseases and disorders after storage of the ‘Ligol’ apple cultivar
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Core/shell structured silica spheres with controllable thickness of mesoporous shell and its adsorption, drug storage and release properties
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Deep insight into the pore size distribution of N-doped porous carbon materials on electrochemical energy storage and CO2 sorption
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Co-etching effect to convert waste polyethylene terephthalate into hierarchical porous carbon toward excellent capacitive energy storage
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Properties of Charge Carrier Traps in Lu2O3:Tb,Hf Ceramic Storage Phosphors Observed by High-Pressure Spectroscopy and Photoconductivity
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The impact of potential leakage from the sub-seabed CO2 storage site on the phosphorus transformation in marine sediments – An experimental study
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