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Hydroxyapatite deposition on the laser modified Ti13Nb13Zr alloy
PublicationThe Ti13Nb13Zr alloy was subjected to laser modification with the Nd:YAG laser provided that such treatment would increase the surface roughness followed improved adhesion of hydroxyapatite (HAp) coatings The hydroxyapatite was deposited by electrophoretic method in suspension of 0.5 g HA powder and 100 ml ethyl alcohol. The deposition was carried out for 10 min at 10 V voltage followed by drying at room temperature for 24 h and...
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Positron collisions with molecular hydrogen: cross sections and annihilation parameters calculated using theR-matrix with pseudo-states method
PublicationThe molecular R-matrix with pseudo-states (MRMPS) method is employed to study positron collisions with H2. The calculations employ pseudo-continuum orbital sets containing up to h (l = 5) functions. Use of these high l functions is found to give converged eigenphase sums. Below the positronium formation threshold, the calculated cross sections agree with other high-accuracy theories and generally with the measurements. Calculation...
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Non-Adaptive Speed and Position Estimation of Doubly-Fed Induction Generator in Grid-Connected Operations
PublicationThe nonadaptive speed and position estimation scheme for a doubly-fed induction generator (DFIG) is presented in this article. The observer structure is based on the extension of the mathematical model of DFIG to the introduced H vector. Based on the defined H vector, the nonadaptive position and speed estimation is proposed. The Lyapunov method is extended to the practical stability theorem to stabilize the structure. The classic...
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Effect of MAO coatings on cavitation erosion and tribological properties of 5056 and 7075 aluminum alloys
PublicationTwo ceramic coatings have been applied on 5056 and 7075 aluminum alloy by microarc oxidation (MAO) technology. The mass losses, surface morphologies and the phase constituents of the MAO coatings before and after cavitation tests were examined by means of digital scales, scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. In order to assess the impact of the mechanical properties of the surface layer on...
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Isothermal calorimetry data for cement pastes containing pristine Bi2O3/Gd2O3 and silica-coated Bi2O3/Gd2O3 structures
Open Research DataCsv file containing raw calorimetric data determined up to 168 h (Tam Air 3 8-channel isothermal calorimeter) of cement pastes containing Bi2O3+Gd2O3 amd silica-coated Bi2O3-Gd2O3 structures. Sample designation in the .csv file is in line with sample designation in the manuscript associated with dataset.
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Chlorido(1-pyrrolidinecarbodithioato-k2S,S')(triphenylphosphine)nickel(II)chloroform hemisolvate
PublicationTytułowy kompleks chloro(1-pirolidynoditiokarbaminiano-S,S')(trifenylofosfina)-nikiel(II), będący hemisolwatem chloroformu zawiera płaski rdzeń o składzie NiClS2P. Molekuły chloroformu oddziałują z kompleksem poprzez słabe wiązania C-H...S.
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Justyna Borucka dr inż. arch.
PeopleJustyna Borucka is an Assistant Professor at the Faculty of Architecture, Gdańsk University of Technology, Coordinator of Erasmus Programme and International Cooperation and since 2016 a Vice-Dean for Development. She is also board member of Polish Architects Association (SARP o.Wybrzeże). Her research focused on theory of architecture and strategies for urban renewal with the special impact of interdisciplinary relationships...
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Recent improvements in prediction of protein structure by global optimization of a potential energy function
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Efektywna metoda selenenylowania z użyciem diselenidu O,O-diizopropylofosforotioilowego
PublicationTworzenie wiązania C-Se odbywa się zwykle z wykorzystaniem elektrofilowego bromku fenyloselenenylowego generowanego in situ z diselenidu difenylowego. Fenyloselenenylowanie soli sodowych malonianów, użytych z 10-krotnym nadmiarem, prowadzi do powstawania znaczących ilości di(fenyloselenenylo)malonianów obok głównych produktów mono-selenenylowania. 2-Fenyloselenenylomaloniany wykorzystano m.in. w reakcji rodnikowej addycji do wiązania...
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Rola i dobór wstępnej obróbki surowych widm w analizie jakościowej i ilościowej z wykorzystaniem techniki spektroskopii bliskiej podczerwieni (NIR)
PublicationSpektroskopia bliskiej podczerwieni (NIR) wykorzystuje absorpcję promieniowania elektromagnetycznego w zakresie 12000-4000 cm-1, (780¬2500 nm). Absorpcja NIR pochodzi od nadtonów i drgań kombinacyjnych wiązań C-H, N-H, O-H. Widmo uzyskane techniką NIR jest unikatowym "odciskiem palca" badanej substancji, gdyż zależy zarówno od właściwości fizyko-chemicznych próbki jak i od stanu fazowego oraz postaci krystalicznej jej składników.Widma...
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Chiral and achiral crystals, charge-assisted hydrogen-bond patterns and self-organization of selected solid diaminium thiosulfates
PublicationAbstract A series of diaminium thiosulfates, derivatives of diamines: NH2CH2CH(CH3)NH2 (1) and NH2(CH2)nNH2, n = 3-6 (2-5 respectively)and thiosulfuric acid were prepared and their structures determined by crystal X-ray diffraction analysis. Compounds 1, 2 and 4 turned out to be hydrates. The crystal structure of 1,2-proylenediaminium thiosulfate is chiral and exhibits spontaneous resolution. Crystals for both enantiomers...
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(R,R)-1-Acetyl-1'-(2,4,6-trinitrophenyl)-2,2'-bipyrrolidine
Publication(R,R)-1-Acetyl-1'-(2,4,6-trinitrophenyl)-2,2'-bipyrrolidine has been synthesized and its rentgenostructure has been determined. The structure of the title molecule, C16H19N5O7, is mainly determined by the steric effect of a bulky 2,4,6-trinitrophenyl group attached to the N atom of a pyrrolidine ring. Both pyrrolidine rings adopt an envelope conformation, with one of the methylene C atoms as the flap in each case, and the N-C-C-N...
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An investigation of microstructural basis for corrosion behavior of Al-CNT composites fabricated by SPS
PublicationIn this research effect of the addition of multi-wall carbon nanotubes (MWCNTs) as additive powder on microstructure and corrosion behavior of fabricated Al-CNT composites was studied. The aluminum powder and CNTs were mixed with high energy planetary ball-mill. It is observed that by increasing milling time, the uniformity of CNTs on aluminum matrix and consequently corrosion resistance of Al-CNT composite is increased. On the...
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Investigation into the Effect of Spinel Pigments on the Photostability and Combustion Properties of Ethylene-Norbornene Copolymer
PublicationMulticolor ethylene-norbornene (EN) composites filled with three different spinel pigments (Cobalt Green-PG50, Zinc Iron Yellow-PY 119, Praseodym Yellow-PY159) were prepared by melt mixing and characterized in terms of their stability under destructive environmental conditions. The EN films were subjected to accelerated aging by ultraviolet (UV) photooxidation for 300 h, 600 h, or 900 h. The mechanical performance of the EN composites...
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Effect of applied standard wood machining fluid on colour and chemical composition of the machined wood surface
PublicationAppropriate monitoring of wood machining processes is a key issue to ensure the expected quality of the processed wood, expected efficiency and minimize energy consumption of production processes. A new trend is the design of environmentally friendly machining fluids. In this paper, as a preliminary study in this field, the effect of applied standard wood machining fluid on changes in the colour and chemical composition of the...
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X-ray diffraction patterns of BaCe0.6Zr0.2Y0.1M0.1O3-δ (M = Fe, Pr, Tb)
Open Research DataThe dataset consists of three raw X-ray diffraction (XRD) files collected using a Phillips X’Pert Pro diffractometer (CuKα radiation (𝜆 = 1.541 Å), under 40 kV and 30 mA). The diffraction patterns of BaCe0.6Zr0.2Y0.1Fe0.1O3-δ (BCZYFe), BaCe0.6Zr0.2Y0.1Pr0.1O3-δ (BCZYPr), and BaCe0.6Zr0.2Y0.1Tb0.1O3-δ (BCZYTb) were collected at room temperature. Collected...
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Coupling coefficients for the space group of the hexagonal close-packed structure
PublicationWe have computed the Clebsch-Gordan coefficients of the representations for the space group of the hexagonal close-packed structure for the points:V, A, H, K, L, M. We enumerate all arms of the wave vector stars and all wave vector selection rules.
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Preliminary in vivo studies of a new lecitin-based formulation of paclitaxel
PublicationPrzeprowadzono wstępne badania in vivo of PTX opartego na lecytynie. Roztwór jest stabilny przez 24 godziny. Po podaniu królikom dawki 0,66mg/kg/h nie zanotowano zmian morfologicznych krwi w porównaniu do komercyjnego produktu Taxol.
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2,2,6,6-Tetramethylpiperidinium triisopropoxysilanethiolate
PublicationTytułowy związek został otrzymany poprzez reakcję tri-izo-propoksysilanotiolu z 2,2,6,6-tetrametylopiperydyną. Oba fragmenty jonowe powiązane są wiązaniami wodorowymi N-H...S. Strukturę cząsteczkową i krystaliczną wyznaczono posługując się rentgenowską analizą strukturalną.
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Reakcje fosforowych odczynników nukleofilowych ze związkami hiperwalencyj- nego jodu (III).**2003, 114 s. 79 rys. 8 tab. bibliogr. 79 poz. maszyn. Rozprawa doktorska (29.09.2002) Wydz. Chemiczny PG Promotor: prof. dr hab. inż. J. Rachoń
PublicationRozprawa dotyczy reaktywności związków hiperwalencyjnego jodu III takich jak: jodozobenzen, diacetoksyjodobenzen, hydroksy[tosyloksy]jodobenzen z fosfo-rowymi odczynnikami nukleofilowymi takimi jak: enolowe postacie >P(O)H kwa-sów lub związki typu PR3.
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2-Ethylphenyl acridine-9-carboxylate and 2,5-dimethylphenyl acridine-9-carboxylate
PublicationMetodą rentgenowskiej analizy strukturalnej oznaczono struktury estrów: trójskośnego 2-etylofenylowego oraz jednoskośnego 2,5-dimetylofenylowego kwasu akrydyno-9-karboksylowego. Oba związki w kryształach tworzą układy oddziaływań typu C-H...π oraz oddziaływań dyspersyjnych.
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Theory and application of Near-infrared spectroscopy
PublicationIn recent years one can observe a significant increase in the requirements on quality control in all industrial sectors. The growing number of involved analyses makes the traditional, time consuming, requiring use of large quantities of reagents, thus expansive methods inconvenient especially for industrial applications. Fortunately, there is a very fast, cheap and not invasive analytical method that is increasingly used in qualitative...
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Metabolomic and antioxidant properties of different varieties and origins of Dragon fruit
PublicationDragon fruit has appealed much concern from consumers as a novelty fruit with potent nutritional and medicinal benefits. Dragon fruit quality warrants comprehensive evaluation, based on the contents of pigments and health- promoting natural compounds in different varieties. This study was aimed to evaluate the differences among dragon fruit varieties extracted with methanol–water (CD3OD-D2O) and methanol (CD3OD) by proton nuclear magnetic...
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Robert Jankowski prof. dr hab. inż.
PeopleHe was born on December 26, 1968 in Gdynia. A graduate of the High School at the Consulate of Poland in Benghazi, Libya (1987), a student at the Gdańsk University of Technology (MSc studies, 1987-1991 and 1992-1993), University of Sheffield, England (BSc studies, 1991-1992), University of Roskilde, Denmark (MSc course, 1993) and University of Tokyo, Japan (PhD studies, 1994-1997). From the beginning of his professional career associated...
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Analiza elektromodulowanej fotoluminescencji w organicznych układach molekularnych
PublicationCelem niniejszej rozprawy doktorskiej jest poddanie interpretacji danych doświadczalnych uzyskanych w pomiarach elektromodulowanej fotoluminescencji (EML), na gruncie różnych modeli teoretycznych separacji nośników ładunku pod wpływem zewnętrznego pola elektrycznego w organicznym molekularnym ciele stałym. Zainteresowanie powyższą tematyką wynika z konieczności weryfikacji istniejących modeli zjawisk fizycznych w materiałach molekularnych...
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Lessons from application of the UNRES force field to predictions of structures of CASP10 targets
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Experimental guinea pig model of dermatophytosis: a simple and useful tool for the evaluation of new diagnostics and antifungals
PublicationCelem badań było opracowanie prostego modelu zwierzęcego (świnki morskie) odpowiedniego do sprawdzania systemów diagnostycznych oraz terapii infekcji dermatofitów. Następujące zmienne były analizowane: przygotowanie skóry przez golenie versus użycie taśmy, testowy szczep Microsporum canis czy Trichophyton mentagrophytes jako czynnik etiologiczny, sposób inokulacji. Przebieg infekcji był oceniany poprzez ocenę zaczerwienienia i...
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Assessment of absorbability of seamless flux cored wires stored in extreme conditions
PublicationWater absorption tests by gravimetric method of three specimens of seamless rutile flux cored wires for flux cored arc welding were carried out. Examined wires are characterized by varied absorbability (Wg is ranged from 0.03 to 0.11% after 200 h of moisturizing).
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Investigation of H2:CH4 plasma composition by means of spatially resolved optical spectroscopy
PublicationThe system based on spatially resolved optical emission spectroscopy dedicated for in situ diagnostics of plasma assisted CVD processes is presented in this paper. Measurement system coupled with chemical vapour deposition chamber by dedicated fiber-optic paths enables investigation of spatial distribution of species densities (Hx, H+, CH, CH+) during chemical vapour deposition process. Experiments were performed for a various...
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A negative effect of carbon phase on specific capacity of electrode material consisted of nanosized bismuth vanadate embedded in carbonaceous matrix
PublicationLithium-ion batteries (LIBs) are widely used all over the world. The LIBs belong to a renewable energy source and energy storage devices. The increase in energy demand causes that new materials of higher energy and higher power densities are still under investigation. Herein, we compare electrochemical properties of bismuth vanadate (BiVO4) embedded and not embedded into carbonaceous matrix as an anode material along with structural...
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Superexcited states in the vacuum-ultraviolet photofragmentation of isoxazole molecules
PublicationThe photofragmentation of isoxazole molecules producing excited atomic and molecular fragments has been investigated over the energy range 16-50 eV, using photon-induced fluorescence spectroscopy. The following fragments have been identified by their fluorescence: the excited hydrogen atoms H(n), n = 3-7 and the diatomic CH(A2Δ, B2Σ−), CN(B2Σ+) and C2(d3Πg) fragments. The diatomic fragments are vibrationally and highly rotationally...
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Properties of recombinant trehalose synthase from Deinococcus radiodurans expressed in Escherichia coli
PublicationA trehalose synthase gene from Deinococcus radiodurans(DSMZ 20539)containing 1659 bp reading frame encoding 552 amino acids was amplified using PCR. The gene was finally ligated into pET30Ek/LIC vector and expressed after isopropyl β-d-thiogalactopyranoside induction in Escherichia coli (DE3) Rosetta pLysS. The recombinanttrehalose synthase (DraTreS) containing a His6-tag at the C-terminus was purified by metal affinity chromatography...
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Spectroscopic Study of Plasma Polymerized a-C:H Films Deposited by a Dielectric Barrier Discharge
PublicationPlasma polymerized a-C:H thin films have been deposited on Si (100) and aluminum coated glass substrates by a dielectric barrier discharge (DBD) operated at medium pressure using C2Hm/Ar (m = 2, 4, 6) gas mixtures. The deposited films were characterized by Fourier transform infrared reflection absorption spectroscopy (FT-IRRAS), Raman spectroscopy, and ellipsometry. FT-IRRAS revealed the presence of sp3 and sp2 C–H stretching and...
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Structure and thermoelectric properties of Bi–Te alloys obtained by novel method of oxide substrates reduction
PublicationA novel method of thermoelectric materials fabrication has been developed. Oxide reagents have been melted at high temperature in air, quenched, milled to powder and reduced in hydrogen to form Bi–Te alloys. Structural and thermoelectric properties of samples have been investigated depending on initial composition and temperature of reduction process. Sample 25Bi2O3–75TeO2 reduced at 340 °C for 10 h has been found to be a p-type...
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Preparation and X-ray structures of selected aminium thiosulfates
PublicationVarious types of aminium thiosulfates (1–6), including hydrates and mixed salts, have been obtained by the reaction of ammonium thiosulfate with amines. Tertbutylamine, cyclo-hexylamine and 1,6-diaminohexane gave crystals of (t-BuNH3)2S2O3·H2O (1), (c-C6H11NH3)2S2O3 (3) and {(NH4)2(H3NC6H12NH3)(S2O3)2} (6), respectively, which were investigated by X-ray structural analysis. Extensive hydrogen bonding of the N-H…O and N-H…S type...
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Usuwanie azotu z wód poosadowych w procesie nitryfikacji - denitryfikacji w reaktorze typu SBR
PublicationOczyszczanie odcieków w wydzielonych systemach pozwala w znaczący sposób obniżyć ładunek azotu kierowany do reaktorów biologicznych. Celem pracy było określenie czasu adaptacji osadu do wód poosadowych oraz zewnętrznego źródła węgla (etanol, olej fuzlowy). W przeprowadzanych testach obserwowano znaczący wzrost szybkości denitryfikacji z 2 mg N/(gsmo*h) do ponad 10 mg N/(gsmo*h) w ciągu trzech tygodni. Wymagany okres adaptacji osadu...
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Bis(ammonium) Zoledronate Dihydrate
PublicationNeutralization of 2-(1-imidazole)-1-hydroxyl-1,1`-ethylidenediphosphonic acid (zoledronic acid) by an excess of ammonia yielded bis(ammonium) zoledronate dihydrate, {C5H8N2O7P2 2−, 2(H4N+), 2(H2O)}. The product is readily soluble in water and forms monocrystals for which the X-ray structural analysis was carried out. The zoledronic anion is of double negative charge due to deprotonation of three P–OH groups and protonation of the...
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Influence of cyclic frozen and defrost on mechanical properties of polytetrafluoroethylene (PTFE)-coated woven fabrics
PublicationThis research aims to determine the influence of the cyclic process of freezing and defrosting on the mechanical properties of the chosen glass fibres and PTFE-coated woven fabrics. The specimens were subjected to freezing at about −20 °C for 4 h and thawing by full immersion into the water at about +20 °C for 4 h. The fabric samples after 25 and 50 frozen cycles were air-dried at room temperature for one week and then subjected...
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Influence of High Temperature Oxidation on Hydrogen Absorption and Degradation of Zircaloy-2 and Zr 700 Alloys
PublicationThe present research was aimed at determining the effects of the oxide layers on hydrogen absorption, microstructure and mechanical properties of the Zircaloy- 2 and Zr 702 alloys. The oxidation was made at 350 °C, 700 °C and 900 °C for 10 to 30 min in laboratory air, followed by hydrogen cathodic charging for 72 h and annealing at 400 °C for 4 h. The slow strain rate tests were carried out on oxidized, charged and annealed specimens. The...
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Sequence-dependent structural properties of B-DNA: what have we learned in 40 years?
PublicationThe structure of B-DNA, the physiological form of the DNA molecule, has been a central topic in biology, chemistry and physics. Far from uniform and rigid, the double helix was revealed as a flexible and structurally polymorphic molecule. Conformational changes that lead to local and global changes in the helix geometry are mediated by a complex choreography of base and backbone rearrangements affecting the ability of the B-DNA...
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Tris(1-pyrrolidinylcarbodithioato-S,S')-cobalt(III) chloroform disolvate
PublicationTytułowy kompleks tris(1-pirolidynoditiokarbaminiano-S,S')-kobalt(III), będący disolwatem chloroformu zawiera Co(III) oktaedrycznie skoordynowany przez trzy reszty ditiokarbaminowe. Molekuły chloroformu zaangażowane są w tworzenie cząsteczkami kompleksu oddziaływań typu C-H...S
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Experimental and theoretical study of protonated water cluster
PublicationZa pomocą metody rojowej zbadano powstanie i dryf dodatnio naładowanych klastrów wody H+(H20)n n=1-7. Oszacowano energie dysocjacji. Prace uzupełniają obliczenia kwantowe konfiguracji wybranych klastrów. Dokonano obliczeń kilkunastu konfiguracji zjonizowanych klastrów.
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Application of neural networks for description of pressure distribution in slide bearing.
PublicationBadano rozkład ciśnienia hydrodynamicznego w łożysku ślizgowym dla wybranych wariantów łożyska. Wykazano, że zastosowanie sieci neuronowych umożliwia opis rozkładu ciśnienia hydrodynamicznego z uwzględnieniem zmian geometrycznych (bezwymiarowa długość - L) i mechanicznych (mimośrodowość względem H) łożyska.
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Morfologia rys i nośność niskich wporników żelbetowych belek w świetle badań
PublicationAutorzy przedstawili w skrócie wyniki własnych badań eksperymentalnych niskich wsporników belek (zarysowanie, odkształcenia stali zbrojeni, nosność) w nawiązaniu do wyników wcześniejszych badań eksperymentalnych wsporników wysokich (h/hk=0,5). Wsporniki obciążane były siłą pionową lub ukośną.
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Bromidotetrakis(2-ethyl-1H-imidazole-KN3)copper(II) bromide
PublicationThe CuII ion in the title complex, [CuBr(C5H8N2)4]Br, is coordinated in a square-pyramidal geometry by four N atoms of imidazole ligands and one bromide anion in the apical position. In the crystal, the ions are linked by a 3-D network of N-H---Br and CH---Br hydrogen bonds.
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Lorda Kamesa filozofia religii
PublicationW artykule przedstawiono główne założenia filozofii religii opracowanej przez szkockiego prawnika H. Hume`a (1696-1782), znanego jako lord Kames. Charakterystycznym rysem tej filozofii była próba pogodzenia radykalnego determinizmu, także w dziedzinie moralności, z religia chrześcijańską.
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N-Benzoyl-N'-phenylurea
PublicationPublikacja zawiera opis struktury krystalicznej i cząsteczkowej N-benzoilo-N'-fenylomocznika wyznaczonej metodą rentgenowskiej analizy strukturalnej. W krysztale dwie cząsteczki łączą się poprzez wiązania wodorowe typu N-H...O tworząc centrosymetryczne dimery.
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Adsorption behavior and corrosion inhibitive characteristics of newly synthesized cyano-benzylidene xanthenes on copper/sodium hydroxide interface: Electrochemical, X-ray photoelectron spectroscopy and theoretical studies
PublicationElegant process for synthesis of 3-(7H-dibenzo[c,h]xanthen-7-yl)benzaldehyde (3), as new starting material to create a set of novel xanthene analogues, 2-(3-(7H-dibenzo[c,h]xanthen-7-yl)benzylidene)malononitrile (4), 3-(3-(7H-dibenzo[c,h]xanthen-7-yl)phenyl)-2-cyanoacrylic acid (5), and Ethyl-3-(3-(7H-dibenzo[c,h]xanthen-7-yl)phenyl)-2-cyanoacrylate (6), was achieved starting with available materials under mild conditions. Various...
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Zastosowanie techniki NIR w analizie jakościowej surowców kosmetycznych i farmaceutycznych
PublicationW ramach współpracy pomiedzy Katedrą Technologii Leków i Biochemii Wydziału Chemicznego PG, a zakładem produkcji kosmetyków i farmaceutyków Ziaja Ltd. podjęto prace badawcze nad opracowaniem nowych metod analitycznych stosując spektroskopię w bliskiej podczerwieni (NIR). Metoda ta wykorzystuje absorpcję promieniowania elektromagnetycznego w zakresie 12 000 - 4 000 cm-1 (780-2500 nm). Absorpcja w zakresie NIR pochodzi głównie nod...
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Transcriptomic Effects of Estrogen Starvation and Induction in the MCF7 Cells. The Meta-analysis of Microarray Results
PublicationEstrogen is one of the most important signaling molecules which targets a number of genes. Estrogen levels regulate cell proliferation and a plethora of metabolic processes, which may interfere with a range of medical conditions and drug metabolism. The MCF7 breast cancer cell line, expressing the estrogen receptor α, is a well-studied model of cellular answer to estrogen. The aim of this study was to characterize transcriptomic...