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Search results for: STRUKTURY IMMUNOGLOBULINOPODOBNE
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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.
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Przestrzeń publiczna a przestrzeń prywatna w strukturze gdyńskiej kamienicy okresu międzywojennego
PublicationKamienica jest jednym z najbardziej charakterystycznych typów zabudowy miejskiej. Stanowi ona ten rodzaj domu mieszkalnego, który -będąc w sensie własnościowym elementem przestrzeni prywatnej - jest jednocześnie w sensie wizualnym i funkcjonalnym elementem przestrzeni publicznej. Dzieje się tak przede wszystkim z uwagi na jej rolę w strukturze miasta - rolę elementu pozostającego na styku obu tych stref. Przedstawienie interakcji...
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Shaking table experimental study on diagnosis of damage and its evaluation in steel structure
PublicationCelem artykułu jest pokazanie wyników badań eksperymentalnych przeprowadzonych na stole sejsmicznym dotyczących identyfikacji uszkodzeń modelu dwukondygnacyjnej konstrukcji stalowej. Uszkodzenie zdefiniowano poprzez spadek sztywności i symulowano poprzez zamianę słupów modelu na elementy o mniejszym przekroju poprzecznym. Wyniki badań pokazują charakterystyczny spadek wartości naturalnych częstotliwości konstrukcji wraz ze wzrostem...
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Structure and electrical properties of nitrided NbN-TiN sol-gel derived films
PublicationW pracy przedstawiono rezultaty badań struktury oraz właściwości elektrycznych warstw NbN-TiN (o różnym stosunku molowym NbN/TiN)otrzymanych w wyniku termicznego azotowania warstw tlenkowych otrzymanych metodą zol-żel. Badania struktury przeprowadzono metodami AFM, XRD oraz XPS. Wynika z nich, iż głównymi fazami w wartstwach są NbN i TiN o rozmiarach ziaren około 100 nm. Jednakże zaobserwowano również istnienie niewielkiej ilości...
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Effect of temperature and gaseous medium on the structure and microhardness of the cobalt base clad layers
PublicationBadano wpływ temperatury utleniania na mikrostrukturę i mikrotwardość napawanych warstw ze stopu kobaltu. Warstwy wytwarzano za pomocą napawania plazmowego (pta) na przylgniach zaworów wylotowych wykonanych ze stali x40CrSiMo10-2. Stop kobaltu był poddany utlenianiu w powietrzu w temperaturach od 750 °C to 1100 °C i w gazach wylotowych w temperaturze 750 °C. W wyniku utleniania zaobserwowano zmanę w mikrotwardości warstw. W zewnętrznej...
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Polypropylene structure alterations after 5 years of natural degradation in a waste landfill
PublicationUp to 25% of plastic waste in Europe is still disposed of in landfills, despite recycling efforts. The plastic waste in the landfill plot may be exposed both to abiotic and biotic degradation processes, although it is thought that most of the plastic materials tend to be resistant to biodegradation or biodeterioration even after a long time. To verify if polypropylene (PP) can undergo the process of short-term biodegradation and...
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Multifaceted Analyses of Four Different Prototype Lightweight Photovoltaic Modules of Novel Structure
PublicationDynamic growth of photovoltaic capacity in Poland encourages many entities to invest in photovoltaic systems. However, in the case of buildings with low roof-bearing capacity it can be problematic or even impossible to mount conventional PV modules due to their relatively high weight. Hence, the use of lightweight PV modules is a potential solution. In this paper four different prototype silicon lightweight modules of novel structure...
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Interrelations between Travel Patterns and Urban Spatial Structure of the Largest Russian Cities
PublicationThe study presented within this dissertation involves the analysis of the relationship between urban spatial structure and travel patterns in the largest Russian cities. It is an empirical investigation of how the spatial structure, formed during the Soviet and post-Soviet periods, affects the travel patterns in the largest cities of contemporary Russia. It aims to determine what measures, both urban structure and transportation...
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Temperature-controlled nanomosaics of AuCu bimetallic structure towards smart light management
PublicationGold–copper nanostructures are promising in solar-driven processes because of their optical, photocatalytic and photoelectrochemical properties, especially those which result from the synergy between the two metals. Increasing interest in their internal structure, such as the composition or distribution of the Au and Cu as well as the size and shape of the nanoparticles, have developed to define their physicochemical properties. In...
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Current Trends in Wick Structure Construction in Loop Heat Pipes Applications: A Review
PublicationThermal control systems have been introduced as an important part of electronic devices, enabling thermal management of their electronic components. Loop heat pipe (LHP) is a passive two-phase heat transfer device with significant potential for numerous applications, such as aerospace applications, high-power LEDs, and solar central receivers. Its advantages are high heat transfer capability, low thermal resistance, long-distance...
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Design and experimental verification of multi-layer waveguide using pin/hole structure
PublicationThis study presents a novel technique for minimizing RF leakage in metallic hollow waveguides fabricated using the multilayer split-block method. By integrating a pin/hole wall into the split-block multilayers, a substantial reduction of RF leakage can be achieved while reducing the circuit size and mitigating the performance variations. To validate the proposed approach, a slot antenna fed by single ridge waveguide has been prototyped...
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Analiza oddziaływań w kryształach związków zawierających w strukturze pierścień pirydynowy
PublicationMożliwość tworzenia się wiązań wodorowych jest kluczowym parametrem z punktu widzenia inżynierii kryształu, ponieważ wiązania wodorowe mają bezpośredni wpływ na strukturę oraz trwałość sieci krystalicznej. Głównym celem niniejszej rozprawy doktorskiej była analiza porównawcza wiązań wodorowych występujących w układach, zawierających w strukturze pierścień pirydynowy. Badane układy podzielono na: (1) układy ze związkami krzemosiarkowymi...
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Structure and magnetic properties of BeO-Fe2O3-Al2O3-TeO2 glass-ceramic composites
PublicationIn this work, glass-ceramics in the xBeO–20Fe2O3–(80-x)TeO2 system with x = 0–25 mol% were synthesized by the traditional melt quenching route and studied by inductively coupled plasma optical emission spectroscopy, X-ray diffraction, confocal microscopy, infrared and Raman spectroscopy. BeO addition was found to support the crystallization process of Fe2O3 during melting, and an increased BeO content was associated with an increased...
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Structure and transport properties of triple-conducting BaxSr1−xTi1−yFeyO3−δ oxides
PublicationIn this work, BaxSr1−xTi1−yFeyO3−δ perovskite-based mixed conducting ceramics (for x = 0, 0.2, 0.5 and y = 0.1, 0.8) were synthesized and studied. The structural analysis based on the X-ray diffraction results showed significant changes in the unit cell volume and Fe(Ti)–O distance as a function of Ba content. The morphology of the synthesized samples studied by means of scanning electron microscopy has shown different microstructures...
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Design of a Patch Power Divider with Simple Structure and Ultra-Broadband Harmonics Suppression
PublicationThis paper introduces a simple H-shaped patch Wilkinson power divider (WPD), which provides ultra wide harmonics suppression band. The presented WPD designed at 1.8 GHz, and exhibits good performance at the operating bandwidth. In the proposed divider structure, two simple patch low-pass filters (LPFs) are employed at each branch, and three open ended stubs are added at each port. The proposed divider, implemented using the aforementioned...
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Fluid–Structure Interaction methods for the progressive anatomical and artificial aortic valve stenosis
PublicationCardiovascular system diseases, as aortic valve stenosis, are the main cause of mortality and morbidity among patients. There is still a room for enhancement of the diagnostic and therapeutic procedures, which will lead to improvement of the treatment. One of the remedies are the computer tools to support the medical diagnoses and prostheses design. The development of a procedure for modeling the aortic valves: anatomical tricuspid...
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Increasing the conductivity of V2O5-TeO2 glass by crystallization: structure and charge transfer studies
PublicationIn the present paper, V 2 O 5 -TeO 2 glass was prepared by the melt-quenching technique. Crystallization of glass with a vanadium content higher than 35%mol results in an increase in electrical conductivity by a few orders of magnitude and a decrease in activation energy from ~0.40 to ~0.12 eV. In this work, a critical review of existing charge transfer models was presented on the example of V 2 O 5 -TeO 2 glass and glass–ceramics....
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Binder-induced surface structure evolution effects on Li-ion battery performance
PublicationA comparative investigation on binder induced chemical and morphological evolution of Li4Ti5O12 electrodes was performed via X-ray photoemission spectroscopy, scanning electron microscopy, and electrochemical measurements. Composite electrodes were obtained using three different binders (PAA, PVdF, and CMC) with 80:10:10 ratio of active material:carbon:binder. The electrochemical performances of the electrodes, were found to be...
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Bifunctional catalyst based on molecular structure: Spherical mesoporous TiO2 and gCN for photocatalysis
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Influence of Hydrogenation on Morphology, Chemical Structure and Photocatalytic Efficiency of Graphitic Carbon Nitride
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Electronic structure and optical properties of boron doped single-wall carbon nanotubes
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Influence of Magnesium Oxide on the Structure and Catalytic Activity of the Wustite Catalyst for Ammonia Synthesis
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Application of stereology for two-phase flow structure validation in fluidized bed reactors
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Numerical analysis of permeability and Darcy effect in heat transfer of pyramid-shaped structure
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Objective relaxation algorithm for reliable simulation-driven size reduction of antenna structure
PublicationThis letter investigates reliable size reduction of antennas through electromagnetic-driven optimization. It is demonstrated that conventional formulation of the design task by direct footprint miniaturization with imposing constraints on electrical performance parameters may not lead to optimum results. The reason is that—in a typical antenna structure—only a few geometry parameters explicitly determine the antenna footprint,...
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Effect of Individual Components of Lignocellulosic Biomass on Methane Production and Methanogen Community Structure
PublicationOne of the major factors that influences the economic feasibility of biogas production is the availability of digestible feedstocks. There is little research on the influence of the chemical composition of biomass on biogas synthesis, especially with regard to the content of lignocellulosic materials. Therefore, the aim of this study was to estimate how differences in the content of cellulose and lignin in lignocellulosic biomass...
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Crystal structure, chemical bonding, and physical properties of layered AIrSn2 (A = Sr and Ba)
PublicationWe report the experimental and theoretical investigation of structure, chemical bonding interactions, and physical properties of new ternary stannides AIrSn2 (A = Sr and Ba). AIrSn2 (A = Sr and Ba) crystallizes in the orthorhombic Re3B-type structure with the space group Cmcm (No. 64). According to single-crystal X-ray diffraction results, the structure of AIrSn2 (A = Sr and Ba) can be considered as a Zintl-type compound with heterogeneous...
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The Effect of Polyurethane Glycolysate on the Structure and Properties of Natural Rubber/Carbon Black Composites
PublicationIn this work the use of polyurethane chemical recycling product (i.e. glycolysis of polyurethane waste realized with the mass excess of polymer) as a plasticizer for natural rubber-based composites was proposed. The effect of plasticizer type (napthenic oil and polyurethane foam glycolysate) and amount (2, 4, 6 or 8 parts per 100 parts of natural rubber) on the processing properties of rubber mixtures and chemical structure, swelling,...
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Influence of Parameters of Laser Beam Welding on Structure of 2205 Duplex Stainless Steel
PublicationLaser welding is used in modern industry, having many advantages comparing to traditional welding technologies. Nowadays, industry sectors such as shipbuilding, automotive and aviation can’t be imagined without laser processing technologies. Possibility of increase of welded joint properties, autogenous welding and high level of process automation makes the technology of laser welding perspective part of the industry. Physical...
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Superconductivity in a new intermetallic structure type based on endohedral Ta@Ir7Ge4 clusters
PublicationWe report the observation of superconductivity at a temperature near 3.5 K for the previously unreported compound TaIr2Ge2. In addition to being a superconductor, this material displays a new crystal structure type that contains endohedral clusters, as determined by single-crystal x-ray diffraction structure refinement; the structure is more complex than those of the commonly observed tetragonal 122 intermetallic phases. Despite...
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The synthesis and structure of a potential immunosuppressant: N-mycophenoyl malonic acid dimethyl ester
PublicationThe synthesis of a potential immunosuppressant, i.e. dimethyl ester of N-mycophenoyl malonic acid was optimized in the reaction of mycophenolic acid (MPA) with amino malonic dimethyl ester in the presence of propanephosphonic anhydride (T3P) as a coupling reagent. The structural properties of the obtained MPA derivative were investigated by NMR, MS and single crystal X-ray diffraction methods. Theoretical considerations of conformational...
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Novel structure and EM-driven design of miniaturized microstrip rat-race coupler
PublicationIn this paper, a novel structure and design procedure of a miniaturized microstrip rat-race coupler (RRC) is described. Small size of the RRC is achieved by folding the transmission lines of the conventional circuit into its interior, as well as by implementation of the structure on three layers. The final size of the coupler realized for the operating frequency of 1 GHz is only 220 mm2, which gives over 95% footprint reduction...
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THE CONCEPT OF MODELING OF SNOW IMPACT ON THE STRUCTURE OF THE SUSPENDED TAURON ARENA ROOF IN CRACOW
PublicationThe article presents studies and numerical simulations on modeling snow influence on TAURON ARENA suspended roof structure in Cracow. The scope of work includes experimental tests, functions solutions taking into account various cases of snow impact according to PN and EC, as well as numerical simulations for the sport and entertainment arena in the Czyzyny district. The FEM roof structure model developed in the SOFISITK software...
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The Spatial Structure of Suburban Zones in Selected Entrepreneurship Nets of the Tricity Metropolitan Area
PublicationThe chapter describes spatial structures and forms of Polish suburban zones shown on the example of two selected towns in the Trojmiasto Metropolitan Area (TMA). The description of the spatial characteristics in the urban sprawl, with focus on the entrepreneurships nests is illustrated by the choice of typological features, such as: form, land use, density. Suburbanisation is described to be global, however one can observe individual...
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Determination of Earth Pressure and Displacement of the Retaining Structure According to the Eurocode 7-1
PublicationComparative analysis of standard guidelines and findings given in EC7-1 and in Polish Standard PN-83/B-03010. Discussed guidelines concerning active and passive earth pressure as well as at rest pressure state. Wall displacement causing limit states of earth pressure and resistance. Interactive assumptions concerning intermediate earth pressure and resistance values. Conclusions and final remarks.
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Reclaimed Rubber/Poly(ε‐caprolactone) Blends: Structure, Mechanical, and Thermal Properties
PublicationThe amount of elastomeric waste, especially from tires is constantly increasing on a global scale. The recycling of these residua should be considered a priority. Compounding the waste rubbers with other polymers can be an excellent alternative to reuse waste materials. This procedure requires solving the issue of the lack of compatibility between the waste rubber particles and other polymers. Simultaneously, there is a claim for...
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IMPACT OF THE FINANCING STRUCTURE ON EFFICIENCY OF HEALTHCARE SYSTEMS IN THE FORMER EASTERN BLOC COUNTRIES
PublicationOut-of-pocket expenditures are a significant barrier in accessing health services. This paper aims to analyse the structure of financing system in the context of the performance indicators of healthcare systems. The study was conducted for the 28 countries of the former Eastern bloc in the years 2000 and 2013, based on data from the World Health Organization. In the DEA-CCR input-oriented model, inputs are the percentage share...
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Preparation and structure of nanocrystalline sol-gel derived Cu doped LiTi2O4 powders
PublicationAmong the spinel oxides materials, lithium titanate (Li1+xTi2-xO4 where 0 ≤ x ≤ 0.33) could be very interested from pratical applications point of view. Lithium titanate is a II type spinel oxide superconductor with relatively high (~13 K for x = 0) superconducting transition temperature Tc. Above Tc lithium titanate shows metallic behaviour and can be used e.g. as electrodes for rechargeable lithium-ion batteries. Since the discovery...
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Application of the X-ray micro computed tomography to the analysis of the structure of polymeric materials
PublicationIn this paper the application of X-ray micro-computed tomography (micro-CT) as a non-destructive testing method of polymeric materials is presented. Increasing applicability of polymers in variedend-use industries such as automotive, building and construction, consumer goods, and packaging is propelling the growth of the global polymer processing market. However, controlling of the polymer structure is one of the most important...
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Finite element modelling of a historic church structure in the context of a masonry damage analysis
PublicationThe paper includes a case study of modelling a real historic church using the finite element method (FEM) based on laser scans of its geometry. The main goal of the study was the analysis of the causes of cracking and crushing of masonry walls. An FEM model of the structure has been defined in ABAQUS. A non-linear dynamic explicit analysis with material model including damage plasticity has been performed. A homogenization procedure...
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Crystal structure and physical properties of AePd1-xP1+x (Ae = Ca, Sr)
PublicationWe report the discovery of two new compounds AePd1-xP1+x (Ae = Ca, Sr) crystallized in different hexagonal structures. Single crystals of AePd1-xP1+x (Ae = Ca, Sr) are obtained using the Bi-flux method. Crystallographic analysis by both powder and single crystal X-ray diffraction shows that CaPd1-xP1+x crystallizes in a non-centrosymmetric hexagonal structure with the space group P-6m2 (No.187) and lattice parameters a = b = 4.0391(9)...
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Structure and thermoelectric properties of nickel-doped copper selenide synthesised in a hydrogen atmosphere
PublicationNickel-doped copper selenide—Cu2-xNixSe (x = 0; 0.01; 0.02; 0.03)—materials with high thermoelectric properties were synthesised through reduction of reagents in hydrogen. The impact of the nickel content on both the microstructure and thermoelectric properties was examined. The nickel-doped samples’ microstructure differed significantly from pristine copper selenide. Besides Cu2Se, copper precipitations were present in the materials....
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Electronic structure calculations in electrolyte solutions: Methods for neutralization of extended charged interfaces
PublicationDensity functional theory (DFT) is often used for simulating extended materials such as infinite crystals or surfaces, under periodic boundary conditions (PBCs). In such calculations, when the simulation cell has non-zero charge, electrical neutrality has to be imposed, and this is often done via a uniform background charge of opposite sign (“jellium”). This artificial neutralization does not occur in reality, where a different...
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Isolation and structure of a covalent cross-link adduct between mitomycin C and DNA
PublicationA DNA cross-link adduct of the antitumor agent mitomycin C (MC) to DNA has been isolated and characterized; the results provide direct proof for bifunctional alkylation of DNA by MC. Exposure of MC to Micrococcus luteus DNA under reductive conditions and subsequent nuclease digestion yielded adducts formed between MC and deoxyguanosine residues. In addition to the two known monoadducts, a bisadduct was obtained. Reductive MC activation...
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Crystal and molecular structure of lithium iodide complex of 13-membered azoxycrown ether
PublicationPublikacja zawiera uzupełniające informacje do znalezionej wcześniej korelacji między typem kationu, rozmiarem makrocyklu i cechami struktury krystalicznej kompleksów a selektywnością elektrod membranowych dotowanych odpowiednimi azo- lub azoksykoronami. Ustalono strukturę krystaliczną i molekularną kompleksu 13-członowej azoksykorony (L13-O) z jodkiem litu. Stechiometria kompleksu jest 1:1. Kryształ zbudowany jest z hydratowanych...
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Structure activity relationship for a series of peptidomimetic antimicrobial prodrugs containing glutamine analogues.
PublicationZbadano specyficzność transporterów Dpp i Opp w stosunku do peptydów zawierających FMDP. Przy pomocy modelowania cząsteczkowego zaproponowano najbardziej prawdopodobne struktury konformerów peptydów i skorelowano je z aktywnością przeciwbakteryjną oraz specyficznością transporterów peptydowych.
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Structure and morphology of hydrogen reduced surface of bismuth germanateand bismuth silicate glasses.
PublicationOtrzymano nanostruktury krystalicznego bizmutu w matrycy XO2(X=Si,Ge) oraz warstwę nanostruktur krystalicznego bizmutu na powierzchni redukowanych w atmosferze wodoru szkieł Bi0.33Ge0.67O1. i Bi0.57Si0.43O1.72. Zaproponowano prosty model budowy zredukowanych szkieł bizmutowo-germanowych potwierdzony wynikami badań AFM i XRD. Obserwowane zmiany przewodnictwa elektrycznego redukowanych szkieł wyjaśniono na podstawie modelu.
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Kwadraturowy DDS z ułamkowo-opóźniającym filtrem o strukturze flash-Farrow.
PublicationW pracy omawiamy nieliniowy algorytm cyfrowego generatora z syntezą bezpośrednią, zwanego krótko DDS od ang. Direct Digital Synthesizer. Proponujemy nowy algorytm kwadraturowego DDS. Pozwala on osiągnąć zarówno wysoki stopień czystości generowanej sinusoidy kwadraturowej, jak i bardzo małe błędy modulacji częstotliwości (FM) przy małej pojemności pamięci ROM, od której zależy pobór mocy zasilania. Ponadto proponujemy nowe podejście...
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Bounding approach to parameter estimation without priori knowledge on model structure error.
PublicationArtykuł przedstawia estymację parametrów modelu ARMA (Autoregresive moving average) metodą zbiorów ograniczonych. Założono brak wiedzy na temat ograniczeń na błąd struktury modelu lub, że wiedza ta jest bardzo konserwatywna. W celu redukcji tego konserwatyzmu, zaproponowano koncepcje modelu punktowo-parametrycznego. W podejściu tym zakłada się istnienie zbioru parametrów modelu oraz błędu struktury odpowiadających każdej z trajektorii...
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The Righi-Leduc effect: on evidence of two-band electronic structure in Nd1.86Ce0.14CuO4-y.
PublicationPrzedstawiono badania temperaturowe zależności oporu elektrycznego, efektu Halla (RH), przewodnictwa cieplnego (k) i współczynnika Righi-Leduc(SRL). Badania wykazały, że współczynnik RL> 0 w szerokim zakresie temperatur RH zmienia znak dwukrotnie w T=50 i 250K. Niezgodność znaków SRL i RH jednoznacznie wskazuje obecność w materiale nośników obu znaków tzn. n- i p- typu. W pracy pokazano, że transport ciepła zdominowany jest przez...