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Wyniki wyszukiwania dla: charge density studies
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Time-frequency characteristics of chemical oscillations. Experimental and model studies.
PublikacjaW publikacji zaprezentowano wykorzystanie czasowo-częstotliwościowych metod analizy sygnałów niestacjonarnych do badania reakcji Biełousowa-Żabotyńskiego. Zastosowanie krótkoczasowej transformaty Fouriera (STFT) pozwoliło na uzyskanie spektrogramów przedstawiających zmiany energii i częstotliwości oscylacji w trakcie trwania reakcji chemicznej. Przedyskutowano podobieństwa i różnice pomiędzy spektrogramami wygenerowanych dla eksperymentalnych...
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Computational studies of friction forces for hard tissue cultivation in bioreactor.
PublikacjaPonieważ wymiana naturalego stawu na endoprotezę może być dokonywana 2-3 razy w życiu, problem leczenia przez transplantację tkanek chrzęstnych nabiera dużego znaczenia. Przeszczepów tkanki można dokonywać z sukcesem wiele razy. W bioreaktorach, środowisko hydrodynamiczne kształtuje hodowlę tkanek in vitro w obecności sił tarcia, poprzez bezpośrednie działanie na morfologię komórek a także poprzez pośrednie działanie na tkankę...
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Ionophores in polymeric membranes for selective ion recognition; impedance studies
PublikacjaBadania impedancyjne membran zawierających jonofory selektywne na kation Na+ (L1) i Cs+(L2) wykazały, ze stala dielektryczna materiału membrany zależy od typu uzytego plastyfikatora i zmienia się w zakresie od 28 do 60. Rezystancja membran zawierających ligand L1 i L2 wynosi 0.15 -1.4 Mohm w zależności od stężenia elektrolitu zewnnetrznego. Testowona dwa typy elektrod jonoselektywnych: elektrody typu ASS z polimerem przewodzącym...
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Positron Annihilation Studies of Silicon Oxides and Oxygen Precipitates in Silicon
PublikacjaTechniki pozytonowe dają możliwości badania defektów i zmian strukturalnych nie obserwowanych innymi metodami. W tej pracy zastosowano 3 różne techniki pozytonowe do badania zmian strukturalnych i tworzenia wydzieleń SiOx w krzemie.
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Theoretical Auger and photoionization studies for open shell atoms andions.
PublikacjaWykorzystano program komputerowy RATIP do badań własności atomów i jonów o dowolnej konfiguracji. Położono nacisk na obliczenia szeregu własności elektronów Augera i fotojonizacji, aby dokonać porównań z ostatnio wykonywanymi doświadczeniami.
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Structural studies of bismuth nanocrystals embedded in SiO2 or GeO2 matrices.
PublikacjaW wyniku wygrzewania w atmosferze wodoru szkieł bizmutowych i germanowych otrzymano warstwę nanogranul bizmutu w otoczeniu amorficznej matrycy oraz powierzchniową warstwę bizmutowych granul. Grubość i struktura tak otrzymanych warstw silnie zależy od czasu i temperatury redukcji.
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Experimental and theoretical studies of resonance effects during silo flow.
PublikacjaPrzedstawiono badania nad rezonansowymi efektami dynamicznymi podczas przepływów silosowych. Wpływ rezonansu na wielkość naporu był analizowany przy pomocy badań doświadczalnych i obliczeń MES na bazie prawa mikropolarnego sprężysto-plastycznego. Doświadczenia wykonano w silosie o przekroju okrągłym i prostokątnym. Zaproponowano efektywną metodę redukcji efektów dynamicznych.
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Data from the survey on additional activities undertaken during studies by foreign graduates of Gdańsk University of Technology
Dane BadawczeThe dataset includes data from the survey on the Gdańsk University of Technology foreign graduates on additional activities undertaken during studies. The research was conducted over a four-month period, from December 2019 to March 2020, using the Computer-Assisted Web Interview (CAWI). The research sample included 142 respondents. The study concerned...
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Phospholipid-functionalized gold electrode for cellular membrane interface studies - interactions between DMPC bilayer and human cystatin C
PublikacjaThis work describes the electrochemical studies on the interactions between V57G mutant of human cystatin C (hCC V57G) and membrane bilayer immobilized on the surface of a gold electrode. The electrode was modified with 6-mercaptohexan-1-ol (MCH) and 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). DMPC was used as a membrane mimetic for monitoring electrochemical changes resulting from the interactions between the functionalized...
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DETERMINATION OF SURFACTANTS IN ENVIRONMENTAL SAMPLES. PART II. ANIONIC COMPOUNDS
PublikacjaSurfactants (SAA) with negative charge of polar group are named as anionic compounds. They are main constituent of most products containing synthetic surfactants. The linear alkylbenzene sulfonates (LAS), alkyl ethoxysulfates (AES) and alkyl sulfates (AS) are typically applied from this class of compounds. Those surfactants are ingredients of household detergents and cleaners, laundry detergents, cosmetic. Moreover they can be...
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The influence of chitosan hydrogel cross-linking by agarose on coating physico-chemical properties
Dane BadawczeThis dataset contains various physicochemical analyses showing the effect of different concentration of chitosan and the cross-linking agent agarose. Each sample is labeled by C and A representing chitosan and agarose concentrations, respectively, while the exact amounts are depicted in the attached table. Fourier-transform infrared (FT-IR) spectroscopy...
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Ex-situ XRD (X-ray Diffraction) results for electrodes under different charge/discharge states
Dane BadawczeEx-situ XRD was employed to analyze the energy storage mechanism of CPMD in ZICs system. The ZICs were firstly charged to 1.8 V from the open circuit voltage (at around 1.3 V), then discharge to 1.0 V and 0.2 V, and finally recharged to 1.0 V and 1.8 V. Sample abbreviations (CPMD) are in agreement with the markings used in the linked publication.
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Combined Spectroscopic Methods of Determination of Density of Electronic States: Comparative Analysis of Diffuse Reflectance Spectroelectrochemistry and Reversed Double-Beam Photoacoustic Spectroscopy
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Electron Density from Balmer Series Hydrogen Lines and Ionization Temperatures in Inductively Coupled Argon Plasma Supplied by Aerosol and Volatile Species
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Interactions of N-alkyl-N-methylmorpholinium based ionic liquids with acetonitrile studied by density and velocity of sound measurements and molecular dynamics simulations
PublikacjaMorpholinium-based ionic liquids (ILs) and their mixtures with polar co-solvents are an interesting class of emerging electrolytes in electrochemistry that is relatively poorly studied. In this work, densities and sound velocities of four ILs, N-ethyl-N-methylmorpholinium tetrafluoroborate, N-butyl-N-methylmorpholinium tetrafluoroborate, N-octyl-N-methylmorpho-linium tetrafluoroborate and N-decyl-N-methylmorpholinium tetrafluoroborate...
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A Text as a Set of Research Data. A Number of Aspects of Data Acquisition and Creation of Datasets in Neo-Latin Studies
PublikacjaIn this paper, the authors, who specialise in part in neo-Latin studies and the his-tory of early modern education, share their experiences of collecting sources for Open Research Data sets under the Bridge of Data project. On the basis of inscription texts from St. Mary’s Church in Gdańsk, they created 29 Open Research Data sets. In turn, the text of the lectures of the Gdańsk scholar Michael Christoph Hanow, Praecepta de arte...
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Broadband dielectric spectroscopy studies of multiple times processed poly(lactic acid)-carbon black composites
Dane BadawczeThis dataset contains broadband dielectric spectroscopy studies of commercially available ProtoPasta 3D printable filament, composed of poly-lactic acid (PLA) and conductive carbon black (CB) filler. The aim of the study is to observe structural differences and applied properties changes under multiple reprocessing of the composite material at different...
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Synthesis of thiol derivatives of azobenzocrown ethers. The preliminary studies on recognition of alkali metal ions by gold nanoparticles functionalized with azobenzocrown and lipoic acid
PublikacjaThe article presents the synthesis of novel 13- and 16-membered azobenzocrown derivatives with peripheral thiol moieties and preliminary studies assessing their possible application in plasmonic sensors based on gold nanoparticles. The effect of the length of the chain connecting the macrocycle with the thiol group and the effect of the presence of the additional functional compound,...
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Spectroscopic studies of Nb-doped tricalcium phosphate glass-ceramics prepared by sol-gel method
PublikacjaCalcium-phosphate based glasses and glass-ceramics play a crucial role in the tissue engineering development. Apart from their high biocompatibility and excellent ability to undergo varying degrees of resorbability1, they exhibit relatively high bioactivity and due to that they are commonly used as bone and dental implants. A substantial research effort is devoted to improve calcium-phosphate materials physico-chemical properties...
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Environmental impacts of food waste management technologies: A critical review of life cycle assessment (LCA) studies
PublikacjaFood waste is a serious global problem. Therefore, it is essential to reduce food waste and adopt recycling strategies to minimize its environmental impacts. However, conventional waste disposal methods emit harmful gases such as dioxin, CH4, N2O, and NH3, which contaminate the air and water resources. This work reviews the environmental consequences of food waste based on lifecycle assessment (LCA) techniques using methods such...
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Small-scale passive emission chamber for screening studies on monoterpene emission flux from the surface of wood-based indoor elements
PublikacjaAnalysis of literature data published in the last fewyears leads to the conclusion that in the process of assessment of emission flux of organic compounds emitted from different types of equipment and finishing materials, new types of devices, among which small-scale passive emission chambers for the performance of in-situ research are designed and applied on a larger scale. These devices can be successfully used for the assessment...
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The Mechanism of a Retro-Diels–Alder Fragmentation of Luteolin: Theoretical Studies Supported by Electrospray Ionization Tandem Mass Spectrometry Results
PublikacjaThe mechanisms of retro-Diels–Alder fragmentation of luteolin are studied theoretically using the Density Functional Theory method (B3LYP hybrid functional) together with the 6-311++G(d,p) basis set and supported by electrospray ionization tandem mass spectrometry (ESI-MS) results. The reaction paths leading to the formation of 1,3A and 1,3B fragment ions observed as the main spectral features in the ESI-MS spectrum are described...
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The scanning spreading resistance microscopy (SSRM) studies of heavy boron-doped diamond oxidation under high-temperature
Dane BadawczeThe dataset contains the results of scanning spreading resistance microscopy (SSRM) of heavy boron-doped diamond (BDD) electrodes subjected to high-temperature oxidation in a furnace at 600 Celsius. The micrographs reveal the local change of electric properties at certainly crystallographic orientations of BDD grains and at the grain boundaries due...
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The most popular fields of study at full-time first-cycle studies and uniform master's studies in 2010/2011
Dane BadawczeUniversities try to adjust their didactic offer to the preferences of university candidates and the market situation. The socio-economic changes of the transformation period meant that specialists in the field of the market economy were in demand on the labor market. Subsequently, at universities, such fields as: "Management" or "Pedagogy" are ranked...
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Synthesis, physicochemical and theoretical studies on new rhodium and ruthenium dimers. Relationship between structure and cytotoxic activity
PublikacjaTwo dimeric compounds of the general formulae (Et3NH)2[Rh2(μ2-L)4Cl2] (1) (where L = thiophene-2-carboxylate) and [((η6-p-cymene)Ru)2(μ-Cl)3]PF6 (2) have been synthesized using a new method. The unique anionic complex 1 (space group P bca) has octahedral coordination in which the equatorial positions are occupied by the oxygen atoms of four thiophene-2-carboxylates in a paddle wheel fashion. In complex 2 (space group ), each Ru(II)...
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The Distribution of Glucosinolates in Different Phenotypes of Lepidium peruvianum and Their Role as Acetyl- and Butyrylcholinesterase Inhibitors—In Silico and In Vitro Studies
PublikacjaThe aim of the study was to present the fingerprint of different Lepidium peruvianum tu- ber extracts showing glucosinolates-containing substances possibly playing an important role in preventinting dementia and other memory disorders. Different phenotypes of Lepidium peruvianum (Brassicaceae) tubers were analysed for their glucosinolate profile using a liquid chromatograph coupled with mass spectrometer (HPLC-ESI-QTOF-MS/MS platform)....
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Dermal microvessel density and maturity is closely associated with atherogenic dyslipidemia and accumulation of advanced glycation end products in adult patients with type 1 diabetes
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Radiation dose distributions in three dimensions from tomographic optical density scanning of polymer gels: II. Optical properties of the BANG polymer gel
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Electrical signatures of Nimbostratus and Stratus clouds in ground-level vertical atmospheric electric field and current density at mid-latitude station Swider, Poland
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Evaluation by means of magneto-acoustic emission and Barkhausen effect of time and space distribution of magnetic flux density in ferromagnetic plate magnetized by a C-core
PublikacjaPokazano wyniki badań emisji magnetoakustycznej (EMA) i efektu Barkhausena (HEB) dla dwóch płyt stalowych o różnych wymiarach. Wyniki te są porównane z wynikami modelowania zjawiska EMA z wykorzystaniem metody elementów skończonych z uwzględniem efektu prądów wirowych. Uzyskano zadawalające dopasowanie modelu, który odtwarzał poszerzenie maksimum EMA oraz przesunięcie fazowe i zmianę amplitudy HEB.
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Spectroscopic and cytotoxic characteristics of (p-cymene)Ru(II) complexes with bidentate coumarins and density functional theory comparison with selected Pd(II) complexes
PublikacjaThis paper presents the synthesis of two new (p-cymene)-ruthenium(II) complexes with the bidentate coumarin ligands. Both complexes were characterized by FTIR spectroscopy, 1H NMR, 13C NMR, MS, elemental analysis and DFT calculations. The X-ray structure of complex 3a was also solved. The cytotoxic properties of both complexes were examined on human leukemia NALM-6 and HL-60 cells and melanoma WM-115 cells. The complexes possess...
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Comparative studies on OSL properties of LiMgPO4:Tb,B powders and crystals
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Spectroscopic studies of UV-irradiated poly(vinyl alcohol)/elastin blends
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The process of developing dynamic capabilities: The conceptualization attempt and the results of empirical studies
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Collusion and bid rigging in the construction industry: case studies from Poland
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Star Polymers vs. Dendrimers: Studies of the Synthesis Based on Computer Simulations
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THE PULSE DESCRIPTORS IN SENSITIVITY STUDIES OF HYBRID SORPTION COLUMN TRANSPORT MODELS
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Morphological studies and ionic transport properties of partially sulfonated diblock copolymers
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Calorimetric studies and thermodynamic modelling of liquid Mg-Pb-Pd alloys
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Calorimetric Studies and Thermodynamic Modeling of Ag–Mg–Ti Liquid Alloys
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Calorimetric studies and thermodynamic properties of Li-Pb-Pd liquid alloys
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Toxicity of cylindrospermopsin in human lymphocytes: Proliferation, viability and cell cycle studies
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Predictive Factors of Late Venous Aortocoronary Graft Failure: Ultrastructural Studies
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Studies on the application of the Passerini reaction and enzymatic procedures to the synthesis of tripeptide mimetics
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Antimicrobial and conformational studies of the active and inactive analogues of the protegrin-1 peptide
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Heteroleptic tri-tert-butoxysilanethiolate complexes of manganese(II) - thermal studies
PublikacjaThe thermal behavior of Mn(II) silanethiolate series [Mn(SR)2L(MeOH)n], where R=SSi(OBut)3, L=heterocyclic nitrogen base and n=0, 1 or 2 has been comparatively investigated using differential scanning calorimetry (DSC), thermogravimetry (TG) and TG-infrared spectoscopy (IR) techniques. The TG curves indicate the differences in the thermal decomposition due to presence of distinct N-donor ligands and labile MeOH molecules coordinated...
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Analytical techniques in studies of the environmental fate of pharmaceuticals and personal-care products
PublikacjaW pracy przedstawiono dane literaturowe odnośnie źródeł emisji, dróg transportu, przemian i metabolizmu, pomiomu stężeń ksenobiotyków z grupy farmaceutyków i środków higieny osobistej w próbkach pobranych z różnych elementów środowiska (woda, gleba, osady denne) oraz próbek bioty. Szczególną uwagę zwrócono na techniki analityczne wykorzystywane w badaniach losu środowiskowego w/w zanieczyszczeń.
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Formulation, characterisation and in vitro studies of doxorubicin-loaded silica–polydimethylsiloxane granules
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Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases
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Pilot plant studies on the removal of trihalomethanes by composite reverse osmosis membranes
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