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Search results for: charge density studies
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Electrochemical impedance studies of AB5 -type hydrogen storage alloy
PublicationDo wyznaczenia własności stopu AB5 wykorzystano elektrochemiczną spektroskopie impedancyjną. Badania impedancyjne wykonano podczas chronowoltamperometri cyklicznej oraz cykli ładowania i rozładowania elektrody. Interpretacja uzyskanych w trybie potencjostatycznym wyników pozwoliła na dalszą interpretacje wyników uzyskanych w trybie galwanostatycznym. Proponowana metodologia umożliwia śledzić parametry elektryczne badanego układu...
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The Studies of Assumptions Accompanying the Calibration of High-Temperature Solution Calorimeter
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Studies of a mixing process induced by a transverse rotating magnetic field
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Calorimetric studies and thermodynamic properties of liquid Ag–Ca alloys
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Structural and calorimetric studies of magnesium-rich Mg-Pd alloys
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The impact of entrepreneurship on regional economy - evidence from empirical studies
PublicationRozdział poświęcony jest analizie wyników badań empirycznych dotyczących relacji pomiędzy przedsiębiorczością a wzrostem gospodarczym, prowadzonych w ostatnich latach na całym świecie. Autorzy przedstawiają rolę tzw. tkanki przedsiębiorczości i powiązań pośrednich (intermediate linkages).W rozdziale zaprezentowano również model relacji pomiędzy przedsiębiorczością a wzrostem gospodarczym.
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Cobalt(II) silanethiolato complexes with dimethylpyridines:crystal structures and spectroscopic studies
PublicationTri-tert-butoksysilanotiolany kobaltu(II) z 2,5-dimetylopirydną, 3,4-dimetylopirydną i 3,5-dimetylopirydną jako dodatkowymi ligandami zostały zsyntetyzowane w reakcji z bimetalicznym [Co{SSi(OtBu)3}(NH3)]2 z odpowiednią pochodną pirydyny. Kompleksy zostały zcharakteryzowane za pomocą rentgenografii strukturalnej, analizy elementarnej, spektroskopii FT-IR oraz UV-vis. Prezentowane kompleksy są cztero- i pięciokoordynacyjne o rdzeniu...
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NMR dispersion studies of poly(ethylene oxide)/sodium montmorillonitenanocomposites
PublicationPraca prezentuje wyniki badań dotyczące struktury nanokompozytów opartych na matrycy poli(tlenku etylenu) zawierającej montmorylonit sodowy. Układy zawierające PEO/MMT scharakteryzowano metodami NMR (Fast Field Cycling NMR), DSC oraz XRD.
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Conformational studies of neurohypophyseal hormones analogues with glycoconjugates by NMR spectroscopy
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Application of ecotoxicological studies in integrated environmental monitoring: possibilities and problems
PublicationPodstawowym celem badań stanu środowiska i procesów w nim zachodzących jest oszacowanie wpływu różnego typu zanieczyszczeń na organizmy żywe, w tym także na organizm człowieka. Jeszcze do niedawna do oceny ryzyka środowiskowego wykorzystywano wyniki uzyskane w trakcie badań analitycznych z wykorzystaniem typowych metod chemicznych i fizykochemicznych. Niestety, miały one charakter badań rutynowych i ograniczały się do oznaczania...
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Over-Voltage Studies in Inverter Fed Induction Motor Drives
PublicationW pracy przedstawiono metodę identyfikacji pojemności pasożytniczych uzwojeń silników asynchronicznych uwzględniającą ich rozłożony charakter. Przedstawiony szerokopasmowy model obwodowy uzwojeń silnika asynchronicznego pozwala na modelowanie zjawisk przepięciowych w silnikach asynchronicznych, w szczególności zasilanych poprzez przekształtniki energoelektroniczne. Zaproponowana metoda analizy umożliwia również określanie składowych...
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Synthesis and structure-activity studies of peptide-acridine/acridone conjugates
PublicationW artykule opisano strukturę, syntezę i biologiczną aktywność peptydowych koniugatów akrydyny i akrydonu jako potencjalnych leków o aktywności przeciwnowotworowej i przeciwwirusowej.
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Electrochemical impedance studies of AB5-type hydrogen storage alloy
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Experimental and numerical studies of double corrugated steel arch panels
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Kinetics studies of recrystallization process of metallic catalysts for ammonia synthesis
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Studies of membrane scaling during water desalination by membrane distillation
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Wettability Studies of Capillary PTFE Membranes Applied for Membrane Distillation
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High pressure studies of Eu2+ and Mn2+ doped NaScSi2O6 clinopyroxenes
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Hydrodynamic studies in magnetically assisted external-loop airlift reactor
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Studies on the influence of β-cyclodextrin derivatives on the physical stability of famotidine
PublicationThe usage of Fourier transform infrared spectroscopy, near infrared spectroscopy, differential scanning calorimetry and microscopy is presented in this work focused on the exploration of the effect of CD on the physical stability of famotidine (FAM). The most significant information was achieved by analysis of the second derivatives ofnear infrared (NIR) spectra recorded. Changes in the shape of spectra derivatives allow...
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The studies on the limonene oxidation over the microporous TS-1 catalyst
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Insulin resistance and hypertension: lessons learned from studies in children
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The effectiveness of therapeutic massage in neck pain – prospective, preliminary studies
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Potentiometric and AM1d studies of silicon podands—silver(I) complexes
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15 N NMR and FTIR studies of 2,4-dinitroanilines and their salts
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Laser operated nonlinear optical studies of BiFe0,9Cr0,1O3 and BiFe0,9Al0,1O3 multiferroics
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Adenylate kinases of thermophilesAquifex aeolicusandGeobacillus stearothermophilus: biochemical and kinetic studies
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Phase Transitions in Pores: Experimental and Simulation Studies of Melting and Freezing
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Core outcomes measures in dental computer vision studies (DentalCOMS)
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Preliminary studies on the evolution of carbon assimilation abilities within Mucorales
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Cytotoxicity of doxorubicin conjugated with C60 fullerene. Structural and in vitro studies
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Laboratorial studies on the seepage impact in open-channel flow turbulence
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AFM, XRD and HRTEM studies of annealed FePd thin films
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FT-IR studies of molecular interactions in formamide-methanol mixtures
PublicationTechniką ATR zmierzono widma FT-IR roztworów metanolu(MeOH) i formamidu(FA) w całym zakresie ich składu. Przeprowadzono analizę faktorową widm, która wykazała obecność dwóch kompleksów molekularnych matanolu z formamidem. Na podstawie profilów stężeniowych indywiduów absorbujących wyznaczono średni skład kompleksów w zależności od składu mieszaniny. Przeprowadzono również analizę pasma CO formamidu metodą widm różnicowych. Wyniki...
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Hydration of simple amides. FTIR spectra of HDO and theoretical studies
PublicationZastosowano metodę ważonych widm różnicowych do opisu hydratacji amidów w roztworach wodnych: formamidu, N-metyloformamidu, N,N-dimetyloformaidu, acetamidu, N-metyloacetamidu, N,N-dimetyloacetamidu. Narzędziem wspomagającym interpretację wyników eksperymentalnych są struktury agregatów solwatacyjnych wokół cząsteczki substancji rozpuszczonej uzyskane na podstawie obliczeń teoretycznych metodą ab initio z korelacją elektronową...
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Proton hydration in aqueous solution: FTIR studies of HDO spectra
PublicationW artykule scharakteryzowano sfery hydratacyjne protonu w roztworze wodnym na podstawie pomiarów widm FTIR wody półciężkiej (HDO), rozcieńczonej izotopowo w H2O. Wyniki eksperymentalne skonfrontowano z obliczonymi metodami chemii kwantowej strukturami niewielkich klasterów wodnych typu H+(H2O)n. Otrzymane geometrie optymalne porównano z odległościami międzyatomowymi otrzymanymi na podstawie położeń pasm HDO. Pierwsza sfera hydratacyjna...
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MOOCs in SP4CE - case studies (Strategic Partnership for Creativity and Entrepreneurship)
PublicationSP4CE stands for Strategic Partnership for Creativity and Entrepreneurship project which has been funded with support from the European Commission under the ERASMUS+ Programme in the period 1st September 2014 - 31st August 2017. The main purpose of SP4CE project is to design innovative e-learning tools for collaboration between students, enterprises and teachers. It concentrates on identifying users’ needs and supports the development...
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Flood Security Strategy - Case Studies from Gdańsk Region
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Blood Pressure - Pulse Transit Time Relationships: Comparative Studies
PublicationA non-invasive and continuous blood pressure estimation could allow a better diagnosis and an earlier detection of various diseases. It could be performed using a photoplethysmography. However, it requires that a relation between blood pressure and pulse transit time is known. Eleven theoretical formulas were used in obtaining the simulated and noise free synthetic data. Then, they were utilized in validation of three, commonly...
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High-accuracy polarimetric studies on lead germanate single crystals
PublicationA high-accuracy polarimetric technique has been used for the characterization of a lead germanate ferroelectric single crystal. The measurement results of the linear and circular birefringence in the [010] direction at a wavelength of 633 nm under the influence of an electric field are presented. Gyration–electric field hysteresis loops at alternative crystal positions in the polarization system have been used to determine the...
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Theoretical studies of fragmentation processes of neutral and ionized furan molecule
PublicationThis PhD thesis focuses on the fragmentation mechanism of the furan molecule in the gas phase. The approach taken in this work comprised of three theoretical methodologies considering the dynamical, energetical and entropic aspects of the studied process. First, molecular dynamics simulations were performed. Next, the potential energy surfaces were explored at the DFT/B3LYP level of theory. Finally, a new statistical Microcanonical...
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Dynamic tests of composite footbridge segment – experimental and numerical studies
PublicationExperimental dynamic tests and numerical simulations of a 3 meters long segment of a footbridge made of polymer composites are presented in the paper. The span-length is reduced, however dimensions of cross-section are the same as the target footbridge. The segment structure is made of sandwich panels, which consist of fibre reinforced polymer (GFRP) laminates (skins) and a PET foam (core). The first part of the paper contains...
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Preliminary studies on the effect of feed speed on the colour change of wood
PublicationThis paper presents the results of preliminary analyses of the effect of cutting parameters on changes in the colour of wood. Beech wood cut with use circular saw was analysed. The cutting parameter tested was the feed speed, represented by the feed per tooth. Sawing processes with different feed per tooth ranging from 0.0008 mm to 0.09 mm were analysed. It was observed that over the entire range of feed rate per tooth analysed,...
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Studies on nitrogen modified TiO2 photocatalyst prepared in different conditions
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Impedance Studies of Phosphate-iron Glasses Containing Niobium and Titanium
PublicationThe ac and dc conductivity in phosphate-iron-niobate glasses with addition of titanium oxide was investigated as a function of temperature and frequency with the use of impedance spectroscopy. The topography and microstructure of glasses were investigated by the means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and confocal microscopy methods. The obtained results show that all samples are amorphous but they...
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Hydration of amino acids: FTIR spectra and molecular dynamics studies
PublicationThe hydration of selected amino acids, alanine, glycine, proline, valine, isoleucine and phenylalanine, has been studied in aqueous solutions by means of FTIR spectra of HDO isotopically diluted in H2O. The difference spectra procedure and the chemometric method have been applied to remove the contribution of bulk water and thus to separate the spectra of solute-affected HDO. To support interpretation of obtained spectral results,...
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Studies of the separation performance of silanized silica gel for simulated distillation
PublicationWe present the results of investigations of the chromatographic (sorptive) properties of silanized silica gel as a stationary phase for gas chromatography used for simulated distillation. Commercially available silanized sorbent (particle diameter range 63–200 m, average pore size 60 Å) was sieved to obtain the 80–100 mesh fraction (180–150 m). The obtained results revealed that silanized silica gel allows the complete separation...
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Evaluating experimental molecular physics studies of radiation damage in DNA*
PublicationThe field of Atomic and Molecular Physics (AMP) is a mature field exploring the spectroscopy, excitation, ionisation of atoms and molecules in all three phases. Understanding of the spectroscopy and collisional dynamics of AMP has been fundamental to the development and application of quantum mechanics and is applied across a broad range of disparate disciplines including atmospheric sciences, astrochemistry, combustion and environmental...
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Studies on optical transmittance of boron-doped nanocrystalline diamond films
PublicationThickness is one of the most important parameters in many applications using thin layers. This article describes thickness determination of a boron-doped nanocrystalline diamond (NCD) grown on fused silica glass. A spectroscopic measurement system has been used. A high refractive index (2.3 at 550nm) was achieved for NCD films. The thickness of NCD samples has been determined from the transmission spectrum.
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Pedestrian safety in road traffic – studies, recommendations and proposed improvements
PublicationPedestrians are involved and most frequently the victims of every third road accident in Poland. Pedestrian accidents most frequently occur in complex circumstances, as a result of many factors related to the behaviour of drivers and pedestrians. The basic parameters that determine road safety include the perception of traffic and visibility on the road. The paper will present the results of research conducted within the project...