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Search results for: thermal-fsi
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Blowing Kinetics, Pressure Resistance, Thermal Stability, and Relaxation of the Amorphous Phase of the PET Container in the SBM Process with Hot and Cold Mold. Part II: Statistical Analysis and Interpretation of Tests
PublicationThe technology of filling drinks without preservatives (such as fresh juices, iced tea drinks, and vitaminized drinks) is carried out using hot filling. Mainly due to the production costs and lower carbon footprint, polyethylene terephthalate (PET) bottles are increasingly used in this technology. In this paper, the main aim is to describe and interpret the results of statistical analysis of the influence of the temperature of...
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Effect of selective doping on the spatial dispersion of donor-induced quantum dots in Si nanoscale transistors
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An in-depth study of the Barkhausen emission signal properties of the plastically deformed Fe-2%Si alloy
PublicationZbadana została korelacja między natężeniem emisji magnetoakustycznej a natężeniem mechanicznego efektu Barkhausena dla próbek ze stali P91 mających różną mikrostrukturę na skutek plastycznego płynięcia w temperaturze pokojowej lub na skutek przyspieszonego pełzania w temperaturze 773K pod naprężeniem 290 KPa. Zakres deformacji plastycznej dla pierwszego zestawu próbek wynosił od 2% do 10,5% a dla drugiego od 0,85% do 10%. Oba...
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New type of repeated Si–C-podand catalysts for solid–liquid phase transfer reactions
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Wpływ zjawisk społecznych na współczesny kryzys ekologiczny w świetle encykliki Laudato si’
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Nadtapianie laserowe silnie schłodzonych stopów Al-Si jako metoda podwyższania odporności korozyjnej.
PublicationPrzedstawiono wyniki badań krzywych polaryzacji i impedancji, uzyskane dla stopu Al-Si nadtapianego przy zastosowaniu okrągłej lub prostokątnej wiązki lasera i mocy 1500-6000 W. Wykazano, że warstwy uzyskane przy użyciu lasera o największej mocy mają duża odporność na korozję i dużą szczelność.
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Mechanizm nanokrystalizacji warstwy wierzchniej stopu Al-Si nadtapianego laserem w niskiej temperaturze.
PublicationPrzedstawiono mechanizm nanokrystalizacji stopu aluminium nadtapianego laserowo po schłodzeniu do niskiej temperatury w powiązaniu z obserwacjami struktury warstwy wierzchniej.
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Role of methylation in electron scattering on X(CH3)4 (X = C, Si, Ge) molecules
PublicationTotal cross sections (TCS) for low-energy electron scattering from X(CH3)4 (where X = C, Si, Ge) molecules have been measured using linear transmission method. Present results and those obtained previously for XH4 molecules were used to determine how methylation of the target is reflected in TCS energy dependence.
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Two-step synthesis of niobium doped Na–Ca–(Mg)–P–Si–O glasses
PublicationNiobium doped biosolubility glasses in the Na–Ca–(Mg)–P–Si–O system were prepared by using an untypical two-step synthesis route. The parent glass was melted in air atmosphere at 1350 °C followed by re-melting the glass in Nb crucible with the addition of metallic Mg/Ca powder in the nitrogen atmosphere. The second melting step was carried out at 1450–1650 °C, using an induction furnace. The topography and structure of the obtained...
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THE USE OF OTC HERBAL SEDATIVES BY PHARMACY PATIENTS – A QUESTIONNAIRES-BASED SURVEY STUDY
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Enhanced Degradation of Ethylene in Thermo-Photocatalytic Process Using TiO2/Nickel Foam
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Large thermo-elastic displacement and stability FEM analysis of multilayered plates and shells
PublicationThe paper concerns the load capacity analysis of thermally loaded multilayered plates and shells. The multilayered body is treated as an equivalent single layer whose kinematics is consistent with first order shear deformation theory. The authors focus on the thermo-elastic stability problem of the thin-walled structures. The equilibrium paths are traced with the use of Riks-Wempner-Ramm algorithm. By making use of the Tsai-Wu...
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Role of Herbal Bioactive Compounds as a Potential Bioavailability Enhancer for Active Pharmaceutical Ingredients
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Thermo-Mechanical Simulation of Underwater Friction Stir Welding of Low Carbon Steel
PublicationThis article investigates the flow of materials and weld formation during underwater friction stir welding (UFSW) of low carbon steel. A thermo-mechanical model is used to understand the relation between frictional heat phenomena during the welding and weld properties. To better understand the effects of the water environment, the simulation and experimental results were compared with the sample prepared by the traditional friction...
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XPS measurements of the Fe-Pb-Si based glass
Open Research DataGlass samples with nominal compositions of xFe2O3-(50-x)PbO–50SiO2, where x = 12.5, 15, 17.5 (mol%) were prepared. Analytical grade substrates were used: Fe2O3, SiO2, and PbO. The appropriate amounts of reagents were mixed in an agate mortar. The powders obtained were melted in porcelain un-enamelled crucibles in an electric furnace at a temperature...
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ZAKRES STOSOWANIA DECYZJI TSI PRM (Decyzja Komisji WE nr 2008/164/WE z dnia 21 grudnia 2007r.)W PROJEKTOWANIU POLSKICH DWORCÓW
PublicationModernizacja każdego dworca musi być realizowana zgodnie z polskimi przepisami budowlanymi, a dodatkowo powinna być zgodna z przepisami Decyzji TSI PRM, o ile te zostały wprowadzone do polskiego prawa, a nie są sprzeczne z polskimi przepisami budowlanymi lub są przepisem szczególnym tych przepisów. Do dziś w Rozporządzeniu Ministra Infrastruktury z dn. 12.04.2002r. w sprawie warunków technicznych, jakim powinny odpowiadać budynki...
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Activity and primary characterization of enzyme from Thermus ruber cells catalyzing conversion of maltose into trehalose
PublicationTermofilna bakteria Thermus ruber wytwarza syntazę trehalozy użyteczną do jednoetapowego przekształcania maltozy w trehalozę. Enzym ten wykazuje największą aktywność w temperaturze 65 C przy pH 6,5. Największą wydajność wytwarzania enzymu osiągano podczas hodowli drobnoustroju w temp. 55 stC w podłożu zawierającym 0,5% peptonu,0,1% ekstraktu drożdżowego oraz 0,% maltozy lub skrobi.
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Novel thermostable ssDNA-binding proteins from Thermus thermophilus and T. aquaticus-expression and purification
PublicationSklonowano w system ekspresyjny pET-30LIC Escherichia coli gen kodujący białka SSB-podobne Thermus thermophilus i T. aquaticus. Oczyszczono do homogenności białka SSB-podobne, a uzyskane preparaty umożliwiają wykonanie badań strukturalnych w/w białek.
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Membrane distillation assisting food production processes of thermally sensitive food liquid items: a review
PublicationPhysical separation technologies have become important tool for processing in the current food manufacturing industries, especially for the products containing bioactive compounds thanks to their health benefits in costumers. As for the processing of bioactive food ingredients implies the implementation of integrated systems oriented to their separation, fractionation, and recovery. In this field, membrane distillation (MD), which...
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Large Hall and Nernst responses from thermally induced spin chirality in a spin-trimer ferromagnet
PublicationThe long-range order of noncoplanar magnetic textures with scalar spin chirality (SSC) can couple to conduction electrons to produce an additional (termed geometrical or topological) Hall effect. One such example is the Hall effect in the skyrmion lattice state with quantized SSC. An alternative route to attain a finite SSC is via the spin canting caused by thermal fluctuations in the vicinity of the ferromagnetic ordering transition....
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Novel thermostable ssDNA-binding proteins from Thermus thermophilus and T. aquaticus - expression and purification
PublicationBiałka SSB są niezbędne do życia każdemu organizmowi. W tej pracy prezentujemy wyniki otrzymania i oczyszczania białek SSB Thermus thermophilus i T. aquaticus. Dotąd były znane białka SSB jedynie o budowie homotetrameru lub heterotrimeru. Białka SSB Thermus thermophilus i T. aquaticus stanowią nową klasę białek SSB - białek homodimerycznych. Ponadto dowiedziono, iż białka te są użyteczne w reakcji PCR.
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Białko SSB-podobne Thermus aquaticus - właściwości biochemiczne, struktura i potencjalne możliwości zastosowania
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Jarosław Chojnacki prof. dr hab. inż.
PeopleBorn in 1961 in Bydgoszcz, professional education started at the Chemical Technical Highschool (I. Łukasiewicz). He graduated from the Faculty of Chemistry at the Gdańsk University of Technology in 1986, defending the work on ion-selective electrodes. Subsequent studies were related to organic and siliconorganic synthesis and, from 2002 year on, to crystallography. The doctoral thesis concerned the Silanotiolanes of coinage metals...
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A concept of zero-dimensional and three-dimensional thermodynamic modelling of steam storage in a steam cycle
PublicationThis work presents the thermodynamic model of steam storage in a steam cycle. The innovative steam storage is an integral part of the unit and thus responds quickly to changes in load. This enhances the primary control reserve while maintaining high efficiency of energy conversion. With regard to power plants, it improves the operational safety of generation units, as it prevents boiler and turbines overload in the case of steep...
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Emulator and simulator of Terma SCANTER and ARPA radar data server
PublicationThe software solutions presented in this paper generate real-time data compatible with ARPA radar standard as well as Terma SCANTER 2001 radar cooperating with Video Distribution and Tracking (VDT) server. Two different approaches to this problem are considered: emulation based on the data captured from real devices and simulation of objects on the sea. For both of them architecture, implementation details and functional test results...
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New procedure of silica gel surface modification-preparation of gaseous standard mixtures of methyl chloride using the technique of thermal decomposition of the surface compound for calibration of a TD-GC-FID system.
PublicationPrzedstawiono nową procedurę modyfikacji powierzchni żelu krzemionkowego w celu wytworzenia związku powierzchniowego będącego źródłem chlorku metylu. Minimalna temperatura rozkładu (150 st. C) zapewnia trwałość chemicznie modyfikowanego złoża w temp. pokojowej. Badania prowadzono w temperaturze optymalnej (280 st.C). Stwierdzono, że powierzchnia żelu jest obsadzona jednorodnie przez związek powierzchniowy i gazowa mieszanina wzorcowa...
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Morphology and structure of V2O5 nanorods deposited on the silicon substrate after reduction
Open Research DataThe DataSet contains the XRD patterns and SEM micrographs of V2O5 nanorods on the silicon substrate after thermal treatment under a reducing atmosphere. Thin films were annealed at 500C for 40 under a reducing atmosphere (94% Ar, 6% H2).
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Maksymalna elastyczność pracy bloków parowych
PublicationW artykule przedstawiono propozycję przyspieszenia startów turbiny parowej poprzez właściwe doprowadzanie pary w trakcie stanów niestacjonarnych. Badano najbardziej wytężone miejsca w urządzeniu, przy uwzględnieniu tradycyjnej hipotezy Hubera-Missesa-Hencky, jak i hipotezy Burzyńskiego. W przypadku licznych startów coraz większe znaczenie odgrywają naprężenia termiczne, dla których najważniejsze są składowe normalne naprężeń, w...
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A study of jet impingement cooling enhancement by concave and convex heat sink shape modifications
PublicationThe rising demand for efficient cooling technologies is a strong driver of extensive research in this area. This trend is particularly strong in turbines and microprocessors technology. Presented study is focused on the jet impingement cooling concept, which is used in various configurations for many years. The potential of the heat sink shape modification is not yet fully explored. Available literature suggests that average Nusselt...
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Crystalline Silicon (c-Si)-Based Tunnel Oxide Passivated Contact (TOPCon) Solar Cells: A Review
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Analysis of mixing rules for the Stillinger-Weber potential: a case study of Ge-Si interactions in the liquid phase
PublicationCiekły stop Ge_{0.25}Si_{0.75} symulowano metodą dynamiki molekularnej, przy użyciu potencjału Stillingera-Webera. Badano wpływ parametryzacji członu potencjału odpowiedzialnego za oddziaływania trójciałowe w trójkach nieidentycznych atomów na strukturę symulowanego stopu. Wpływ ten okazał się być znaczący.Zmiany w parametrach rzędu kilku procent skutkowały istotnymi różnicami w parowych funkcjach rozkładu, kątowych funkcjach rozkładu...
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Influence of the boron doping level on the electrochemical oxidation of the azo dyes at Si/BDD thin film electrodes
PublicationIn this study the efficiency of electrochemical oxidation of aromatic pollutants, such as reactive dyes, at boron-doped diamond on silicon (Si/BDD) electrodes was investigated. The level of [B]/[C] ratio which is effective for the degradation and mineralization of selected aromatic pollutants, and the impact of [B]/[C] ratio on the crystalline structure, layer conductivity and relative sp3/sp2 coefficient of a BDD electrode were...
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Assessment with mechanical Barkhausen effect of residual stress in grain oriented polycrystalline 3% Si-Fe sheet
PublicationW tym artykule zostały opisane badania naprężeń resztkowych w blachach wykonanych z 3% si-fe o zorientowanym ziarnie za pomocą mechanicznego efektu barkhausena (mebn). badano blachy o 3 różnych orientacjach ziaren względem głównej osi próbki: 0, 45, 90 stopni. badania mebn przeprowadzano wzbudzając drgania skrętne oraz drgania gięte. zmierzone maksima obwiedni napięcia skutecznego mebn znajdują się dla badanych próbek w regionie...
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Hybrid high-frequency-SiC and line-frequency-Si based PEBB for MV modular power converters
PublicationIzolowane przekształtniki DC-DC o sterowanym kącie przesunięcia napięć strony pierwotnej i wtórnej są kluczowymi elementami współczesnych modułowych przekształtników energoelektronicznych średniego napięcia (SN). W porównaniu do konwencjonalnych przekształtników SN, przekształtniki modułowe z izolowanymi przetwornicami DC-DC nie wymagają izolacji w postaci wielkogabarytowych transformatorów o częstotliwości sieci. Zastosowanie...
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Core/shell structured Ti/Si/C composite for high-performance zinc-ion hybrid capacitor
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Influence of reduction process on the structural and mechanical properties of (Pb,Bi)-(Si,Ge)-O oxide glasses
PublicationThe effect of the reduction process in H2 at 380 °C on the microstructure and elemental composition of a glass Bi0.4Pb0.2Si0.4Ox has been investigated. It has been shown that after reduction a clearly separated top layer with a thickness of approx. 50 µm was formed on the surface of the sample. This layer is depleted of oxygen and has higher electrical conductivity than the interior of the glass. It has also been found that some...
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Crystalline Silicon (c-Si)-Based Tunnel Oxide Passivated Contact (TOPCon) Solar Cells: A Review
PublicationContact selectivity is a key parameter for enhancing and improving the power conversion efficiency (PCE) of crystalline silicon (c-Si)-based solar cells. Carrier selective contacts (CSC) are the key technology which has the potential to achieve a higher PCE for c-Si-based solar cells closer to their theoretical efficiency limit. A recent and state-of-the-art approach in this domain is the tunnel oxide passivated contact (TOPCon)...
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Efficiency of pollutants removal from landfill leachates using Nb/BDD and Si/BDD anodic oxidation
PublicationLandfill leachates (LLs) is a complex, refectory and difficult to depurate liquid generated from sanitary landfills. It contains excessive levels of biodegradable and in particular non-biodegradable products (e.g. heavy metals, phenols, sulphide, plasticisers). LLs are among the effluents that may pose major environmental concerns, they can be a dangerous source of pollution e.g. due to infiltration into soil and underlying water....
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Role of methylation in electron scattering on X(CH3)4 (X= C, Si, Ge) molecules (2)
PublicationTo investigate how replacement of H atom with methyl group (CH3) – in tetrahedral compounds of carbon, silicon and germanium – affects electron scattering process, total cross sections (TCS) for electron scattering from C(CH3)4, Si(CH3)4 and Ge(CH3)4 molecules have been compared with data for CH4, SiH4 and GeH4 molecules. All examined data have been obtained with the same experimental setup. The shape of all discussed TCS energy...
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Assessment with mechanical Barkhausen effect of residual stress in grain oriented polycrystalline 3% Si-Fe sheet
PublicationZbadano za pomocą mechanicznego efektu Barkhausena poziom napręzeń wewnętrznych w plikrystalicznej płycie z 3% Si-Fe o zorientowanym ziarnie.
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Low-frequency noise in Au-decorated graphene–Si Schottky barrier diode at selected ambient gases
PublicationWe report results of the current–voltage characteristics and low-frequency noise in Au nanoparticle (AuNP)-decorated graphene–Si Schottky barrier diodes. Measurements were conducted in ambient air with addition of either of two organic vapors, tetrahydrofuran [(CH2)4O; THF] and chloroform (CHCl3), as also during yellow light illumination (592nm), close to the measured particle plasmon polariton frequency of the Au nanoparticle...
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Mateusz Kopec Dr hab. inż.
PeopleHead of the Materials and Structural Testing Laboratory in Institute of Fundamental Technological Research PAS and Academic visitor in Imperial College London. Lecturer and Master/PhD students supervisor in Doctoral School of IPPT PAN and TIB PAN, and Imperial College London. Member of Polish Materials Science Society, Member of the Board of Polish Society of Theoretical and Applied Mechanics, and Council Member of the European...
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Palestrica Mileniului III - Civilizatie si Sport
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Revista de Cercetare si Interventie Sociala
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Optimization of Novel Human Acellular Dermal Dressing Sterilization for Routine Use in Clinical Practice
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Non-steroidal anti-inflammatory drugs are safe with respect to the transcriptome of human dermal fibroblasts
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Structural and Thermo-Mechanical Properties of Poly(ε-caprolactone) Modified by Various Peroxide Initiators
PublicationThe modification of poly(ε-caprolactone) (PCL) was successfully conducted during reactive processing in the presence of dicumyl peroxide (DCP) or di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB). The peroxide initiators were applied in the various amounts of 0.5 or 1.0 pbw (part by weight) into the PCL matrix. The effects of the initiator type and its concentration on the structure and mechanical and thermal properties of PCL were...
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Sustainable upcycling of brewers’ spent grain by thermo-mechanical treatment in twin-screw extruder
PublicationThermo-mechanical treatment of brewers’ spent grain (a by-product of beer manufacturing) was successfully performed via the extrusion process. The impact of temperature (from 30 to 180 °C), throughput (from 1 to 5 kg/h) and screw speed (from 75 to 375 rpm) on particle size, color, chemical structure, antioxidant activity and thermal stability of resulting material, as well as correlations between particular properties, were investigated....
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Insights into the Thermo-Mechanical Treatment of Brewers’ Spent Grain as a Potential Filler for Polymer Composites
PublicationThis paper investigated the impact of twin-screw extrusion parameters on the properties of brewers’ spent grain. The chemical structure, antioxidant activity, particle size, and color properties, as well as the emission of volatile organic compounds during extrusion, were investigated. The main compounds detected in the air during modifications were terpenes and terpenoids, such as α-pinene, camphene, 3-carene, limonene, or terpinene....
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Comparison of antioxidative properties of raw vegetables and thermally processed ones using the conventional and sous-vide methods
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