Search
Filters
total: 7570
filtered: 6312
-
Catalog
Chosen catalog filters
displaying 1000 best results Help
Search results for: phase change materials
-
Hybrid materials comprising trimethylglycinamide groups: immobilization consequences for anion binding affinities
Publication -
Uzyskiwanie energii za pomocą materiałów piezoelektrycznych = Power harvesting with piezoelectric materials
PublicationW artykule przedstawiono metody uzyskiwania energii za pomocą materiałów piezoelektrycznych. Piezoelektryki są materiałami, które mogą przetwarzać energię pochodzącą z drgań otocznia na energię elektryczną, która jest magazynowana i użyta do zasilania urządzeń. W ostatnim czasie wzrosło zapotrzebowanie na urządzenia w skali mikro, dlatego też wygenerowanie energii pochodzącej z piezoelektryków może okazać się alternatywą dla tradycyjnych...
-
Composite materials for Solid Oxide Fuel Cells - various ways of preparation and application
PublicationWykonano przeglad mozliwosci zastosowania materialow kompozytowych w wysokotemperaturowych tlenkowych ogniwach paliwowych oraz scharakeryzowano najbardziej popularne metody wytwarzania i nakladania tego typu materialow.
-
Surface area investigation of materials with transition layers of continuously changing electron density
Publication -
CHITOSAN-DERIVATIVES IN COMBINATIONS WITH SELECTED PORPHYRINOIDS AS NOVEL HYBRID MATERIALS FOR MEDICINE AND PHARMACY
Publication -
Synthesis of sol-gel mesoporous silica materials providing a slow release of doxorubicin
Publication -
Design of a most efficient fuel cell using noble metals and composite materials.
Publication -
Synthesis and application of doxorubicin-loaded silica gels as solid materials for spectral analysis
Publication -
Comparative Evaluation of Compacting Process for Base Materials using Lab Compaction Methods
Publication -
Application of photoactive electrospun nanofiber materials with immobilized meso-tetraphenylporphyrin for parabens photodegradation
Publication -
Effect of kenaf fibre modification on morphology and mechanical properties of thermoplastic polyurethane materials
PublicationThe presented study examined the morphology and mechanical properties of biocomposites obtained from kenaf natural fibre and thermoplastic polyurethane. Kenaf was modified using various methods, namely: acetylation, blocked isocyanate, maleic anhydride and permanganate treatment. Those methods and ways of carrying out of surface modifications were not studied before on kenaf/thermoplastic polyurethane composites. Different fibre...
-
Preparation, characterization, and manufacturing of new polymeric materials for 3D printing for medical applications
PublicationThis work concerns the synthesis, formation, and characteristics of new filaments for 3D printing in FDM™/FFF technology for medical purposes. Two types of filaments were developed, i.e. degradable polyurethane and biodegradable polylactide-starch. The influence of the 3D printing process on selected filament properties was investigated. A detailed analysis of the filament formation process by the extrusion method was carried out,...
-
Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures 2019
PublicationDesigning a concrete mix is a process of synthesizing many components, it is not a simple process and requires extensive technical knowledge. The design process itself focuses on obtaining the required strength of concrete. Very often designing a concrete mix takes into account the need to maintain the proper water-demand and frost-resistance features. The parameters that influence the concrete class most significantly are the...
-
Bioconversion of waste materials to hydrogen via dark fermentation using Enterobacter aerogenes
PublicationHydrogen can be obtained via dark fermentation with the use of anaerobic Enterobacter aerogenes. The efficiency of hydrogen production by fermentation techniques is strongly dependent on the con-ditions used i.e. the pH range, temperature, composition of fermentation broths, oxygen content, or even the presence of substances with potentially inhibitory effects on the microbiological culture [1-4]. The paper describes the study...
-
Adsorption performance of graphitic carbon nitride-based materials: Current state of the art
Publication -
Possibility of Application of Magnetoacoustic Emission for the Assessment of Plastic Deformation Level in Ferrous Materials
PublicationArtykuł prezentuje wyniki badań dotyczących możliwości zastosowana emisji magnetoakustycznej (EMA) do nieniszczącej oceny stopnia deformacji plastycznej próbek poddanych jednoosiowemu rozciąganiu. Przebadane zostały cztery różne materiały: stale 13HMF, CSN12021 i P91 oraz żelazo Armco. Badania pokazały, że różne parametry magnetyczne i magnetoakustyczne badanych materiałów mogą zmieniać się w rożny sposób, jednakże zawsze obserwuje...
-
Deformation degree estimators for several basic structural units in numerically simulated materials
PublicationW pracy wprowadzono i zdefiniowano kilka estymatorów stopnia deformacji dla serii bazowych jednostek strukturalnych typu CA_n (C-kation, A-anion) występujących w strukturach symulowanych numerycznie. Do wyznaczenia rozkładu wartości estymatoróww funkcji stopnia deformacji kształtu zadanego wielościanu zastosowano symulacje Monte Carlo. Otrzymane rozkłady są danymi referencyjnymi, które są bardzo użyteczne przy jakościowej analizie...
-
Identification of Drag Parameters of Flow in High Permeability Materials by U-Tube Method
Publication -
Ternary Bismuthide SrPtBi2: Computation and Experiment in Synergism to Explore Solid-State Materials
PublicationA combination of theoretical calculation and the experimental synthesis to explore the new ternary compound is demonstrated in the Sr–Pt–Bi system. Because Pt–Bi is considered as a new critical charge-transfer pair for superconductivity, it inspired us to investigate the Sr–Pt–Bi system. With a thorough calculation of all the known stable/metastable compounds in the Sr–Pt–Bi system and crystal structure predictions, the thermodynamic...
-
FEM analysis of composite materials failure in nonlinear six field shell theory
PublicationThe monography deals with the problem of failure initiation in thin laminated composites. Known techniques of laminate structures modelling are briefly characterised. Eventually, shell based approach is chosen for the purpose of the description of the composite structures behaviour, as it predicts their deformation and states of stress effectively in a global sense. The nonlinear six parameter shell theory (6p theory) with asymmetric...
-
Modelling of strain localization in quasi-brittle materials with non-local continuum models
PublicationW artykule przedstawiono wyniki numerycznej lokalizacji odkształceń w elementach betonowych przy zastosowaniu modelu sprężysto-plastycznego i modelu z degradacja sztywności. Do opisu rys, model rozszerzono o składniki nielokalne. Obliczenia wykonano dla prostych problemów brzegowych
-
Investigations of vortex structures in granular materials under earth pressure conditions by DEM
PublicationW artykule pokazano rozwój wirów na poziomie ziarna materiału granulowanego podczas parcia pasywnego piasku na sztywną ściankę przemieszczającą się poziomo. Obliczenia wykonano stosując metodę DEM. Przyjęto 3 różne sposoby wyznaczenia wirów i ich czestotliwości.
-
TiO2 with Tunable Anatase-to-Rutile Nanoparticles Ratios: How Does the Photoactivity Depend on the Phase Composition and the Nature of Photocatalytic Reaction?
Publication -
Polymer derived SiOC/Sn nanocomposites from a low-cost single source precursor as anode materials for lithium storage applications
PublicationMetal- based materials capable of lithium (Li) alloy formation are key to realization of the next generation of high-energy density anodes for Li-ion batteries, owing to their high storage capacity. Designing a good sup- porting matrix is essential for homogeneously nesting these metallic nanodomains, to effectively utilize their high capacity while tackling the volume expansion issues. Silicon oxycarbides (SiOC), obtained via...
-
Współczesna sytuacja socjolingwistyczna Finlandii na tle zmian demograficznych [Contemporary Demographic and Sociolinguistic Situation in Finland against the background of the demographic change]
Publication -
CYP3A4 overexpression enhances apoptosis induced by anticancer agent imidazoacridinone C-1311, but does not change the metabolism of C-1311 in CHO cells
PublicationWe examine whether CYP3A4 overexpression influences the rate and pattern of antitumor imidazoacridinone C-1311 metabolism, in relation to the impact of this overexpression on cell cycle progression and final cellular response of CHO cells following C-1311 treatment. Methods: Three CHO cell lines: CHO-WT, wild type, CHO-HR, overexpressing cytochrome P450 reductase (CPR) and CHO-HR-3A4, coexpressing CPR and CYP3A4 were applied....
-
Ionogel sorbent coatings for determining organophosphorus and pyrethroid insecticides in water and fresh juice samples by headspace-solid phase microextraction
PublicationThe sol–gel method yielded three different ionogel sorbent coatings that were obtained based on a silica material containing ionic liquids (ILs) immobilized in its pores. Two ILs, triethylsulfonium bis(trifluoromethylsulfonyl) imide [Set3][TFSI] and 1-butyl-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide [C4C1Pip][TFSI], as well as their equimolar mixture [Set3/C4C1Pip], were used to obtain ionogel fibers. The developed...
-
Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters
PublicationThe magnetizing inductance of the medium frequency transformer (MFT) impacts the performance of the isolated dc-dc power converters. The ferrite material is considered for high power transformers but it requires an assembly of type “I” cores resulting in a multi air gap structure of the magnetic core. The authors claim that the multiple air gaps are randomly distributed and that the average air gap length is unpredictable at the...
-
Matrix solid-phase dispersion (MSPD) as simple and useful sample preparation technique for determination of polybrominated diphenyl ethers (PBDEs) in dust
PublicationIn the present study a novel analytical procedure for the determination of polybrominated diphenylethers in dust samples was developed.The main aim of the research was the selection of the optimum conditions of the matrix solid-phasedispersion before thefinal determination of polybrominated diphenyl ethers in dust samples. In order toassess the best usefulness of this technique, a favourable ratio of sample amount to the mass ofdispersing...
-
Photocatalytic activity of TiO2 polymorph B revisited: physical, redox, spectroscopic, and photochemical properties of TiO2(B)/anatase series of titanium dioxide materials
Publication -
A- and B-site doping effect on physicochemical properties of Sr2−xBaxMMoO6 (M = Mg, Mn, Fe) double perovskites — candidate anode materials for SOFCs
Publication -
Rapid Characterization of the Human Breast Milk Lipidome Using a Solid-Phase Microextraction and Liquid Chromatography-Mass Spectrometry-Based Approach.
PublicationHuman breast milk (HBM) is a biofluid consisting of various biomolecules such as proteins, lipids, carbohydrates, minerals and bioactive substances. Due to its unique and complex composition, HBM provides not only nutritional components required for the growth of the infant, but also additional protection against infections. Global insight into the composition of HBM is crucial to understanding the health benefits infants receive...
-
Various types of semiconductor photocatalysts modified by CdTe QDs and Pt NPs for toluene photooxidation in the gas phase under visible light
PublicationA novel synthesis process was used to prepare TiO2 microspheres, TiO2 P-25, SrTiO3 and KTaO3 decorated by CdTe QDs and/or Pt NPs. The effect of semiconductor matrix, presence of CdTe QDs and/or Pt NPs on the semiconductor surface as well as deposition technique of Pt NPs (photodeposition or radiolysis) on the photocatalytic activity were investigated. The as-prepared samples were characterized by X-ray powder diffractometry (XRD),...
-
The triple-sorbents solid-phase extraction for pharmaceuticals and estrogens determination in wastewater samples
Publication -
Solid phase synthesis and biological activity of linear tuftsin and retro-tuftsin derivatives
PublicationPrzedstawiono syntezę na fazie stałej nowych pochodnych tuftsyny i retro-tuftsyny i ich mikrobiologiczne właściwości. Otrzymane pochodne zawierały wiązanie izopeptydowe między epsilon-aminową grupą lizyny a takimi aminokwasami jak: Ala, beta-Ala, Val, Ile, Gly.
-
Solid phase synthesis of conjugates of tuftsin analogues with 1-nitro-acridine derivatives
PublicationZsyntetyzowano na fazie stałej koniugaty 1-nitro-akrydyny z pochodnymi tuftsyny modyfikowanymi na grupie epsilon-aminowej lizyny prostymi aminokwasami, np. alaniną, valiną, beta-alaniną. Końcowe produkty były charakteryzowane za pomocą MS, NMR, analizy elementarnej i przekazane do badań ich aktywności przeciwnowotworowej.
-
Effect of structure modification with potassium on grains layer creation process and phase transitions
PublicationZbadano szkła germanianowo-ołowiowe i krzemianowo bizutowe. Wartwy metalicznych granul wytwarzano w nich poprzez redukcję powierzchni w atmosferze wodoru. Praca dotyczy wpływu potasu na tworzenie się warstwy granul oraz na procesy topnienia i krzepnięcia granul w trakcie obróbki termicznej.
-
Kinetics of Biotic and Abiotic CO Production during the Initial Phase of Biowaste Composting
Publication -
Luminescent and Scintillation Properties of CeAlO3 Crystals and Phase-Separated CeAlO3/CeAl11O18 Metamaterials
Publication -
P3HT:PCBM blend films phase diagram on the base of variable-temperature spectroscopic ellipsometry
Publication -
How Do Intermolecular Interactions Evolve at the Nematic to Twist–Bent Phase Transition?
Publication -
Phase diagram of P3HT:PC70BM thin films based on variable-temperature spectroscopic ellipsometry
Publication -
Anomalous Thermal Behavior of Salicylsalicylic Acid and Evidence for a Monotropic Transition to a Nematic Phase
Publication -
The existence and gas phase acidity of the HAlnF3n+1 superacids (n=1–4)
Publication -
A new method for preparation of rutile phase titania photoactive under visible light
Publication -
Static headspace sampling and solid-phase microextraction for assessment of edible oils stability
PublicationStatyczna analiza fazy nadpowierzchniowej i mikroekstrakcja do fazy stacjonarnej z fazy nadpowierzchniowej zostały zastosowane do oznaczenia niskocząsteczkowych aldehydów - markerów procesu utleniania olejów roślinnych. Zoptymalizowano parametry izolacji i ekstrakcji analitów dla obu technik. Wyznaczono granice oznaczalności i wykrywalności oraz powtarzalność dla badanych związków. Obie metody zastosowano w analizie próbek olejów...
-
Matrix solid-phase dispersion with sand in chromatographic analysis of essential oils in herbs
Publication -
Headspace liquid phase microextraction for quantitation of hexanal in potato crisps by gas chromatography
Publication -
Solid-phase microextraction and ion chromatographic analysis of anions based on polypyrrole electrode
Publication -
In-Tube Molecularly Imprinted Polymer Solid-Phase Microextraction for the Selective Determination of Propranolol
Publication