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Search results for: FTIR%20SPECTROSCOPY
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Cross-sections for electron-scattering from 2-methyl-1-buten-3-yne, C 5 H 6 , molecules
PublicationtCross-sections for electron collisions with the 2-methyl-1-buten-3-yne [H2C C(CH3)C CH] moleculewere measured and calculated. Absolute grand-total electron-scattering cross-section (TCS) was takenat impact energies from 0.6 to 300 eV in the linear electron-transmission experiment. The TCS energydependence for the electron–C5H6collision has two prominent enhancements separated with a deepminimum located near 1.8 eV. In addition,...
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Study of ultraviolet-visible fluorescence emission following resonant Auger decay of the 2p-1nl core-excited states of argon atoms
PublicationWe have studied the excitation and relaxation of Ar+ ions populated in resonant Auger decay from the Ar 2p−1nl core-excited states by using ultraviolet-visible fluorescence spectroscopy and photon-photon delayed coincidence technique. Fluorescence emission yields were measured in the photon energy range of 240-–255 eV for the 3s23p4(1D)5s(2D) → 3s23p4(1D)4p(2F) (393 nm) and 3s23p4(1D)4d(2F) → 3s23p4(1D)4p(2F) (335 nm) transitions...
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Theoretical interpretations of photoelectron spectra of platinum atom, its cation and anion
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Theoretical interpretation of photoelectron spectra of the iridium neutral atom and anion
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Precise x-ray energies of gadolinium determined by a combined experimental and theoretical approach
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The electronic excited states of dichloromethane in the 5.8-10.8 eV energy range investigated by experimental and theoretical methods
PublicationWe present a comprehensive experimental high-resolution vacuum ultraviolet (VUV) photoabsorption spectrum of dichloromethane, CH 2 Cl 2 , with absolute cross sections determined for the full 5.8–10.8 eV energy-range. The calculations on the vertical excitation energies and oscillator strengths were performed using the equation-of-motion coupled cluster method, restricted to the single and double excitations level (EOM-CCSD), and...
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Optimization of the femtosecond laser impulse for excitation and the Spin-Orbit mediated dissociation in the NaRb Dimer
PublicationWe study the dynamics of multiple coupled states under the influence of an arbitrary time-dependent external field to investigate the femtosecond laser-driven excitation and the spin-orbit mediated dissociation in the NaRb dimer. In this process, the dimer is excited from the ground triplet state 1^3Sigma+ to the 1^3Pi state using the femtosecond laser impulse and the spin-orbit coupling between the 1^3Pi and 2^1Sigma+ states results...
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Synthesis and Structure of Novel Copper(II) Complexes with N,O- or N,N-Donors as Radical Scavengers and a Functional Model of the Active Sites in Metalloenzymes
PublicationToevaluatetheantioxidantactivityofpotentialsyntheticenzymemimetics,wepreparednewfivecopper(II)complexesviaaself‐assemblymethodandnamedthem[Cu(2‐(HOCH2)py)3](ClO4)2(1),[Cu(2‐(HOCH2)py)2(H2O)2]SiF6(2),[Cu2(2‐(HOCH2CH2)py)2(2‐(OCH2CH2)py)2](ClO4)2(3),[Cu(pyBIm)3](BF4)2∙1.5H2O(4)and[Cu(py2C(OH)2)2](ClO4)2(5).ThesyntheticprotocolinvolvedN,O‐ orN,N‐donors:2‐(hydroxymethyl)pyridine(2‐(HOCH2)py),2‐(hydroxyethyl)pyridine(2‐(HOCH2CH2)py),2‐(2‐pyridyl)benzimidazole(pyBIm),di(2‐pyridyl)ke‐tone(py2CO).TheobtainedCu(II)complexeswerefullycharacterisedbyelementalanalysis,FTIR,EPR,UV‐Vis,single‐crystalX‐raydiffractionandHirshfeldsurfaceanalysis.Crystallographicandspectroscopicanalysesconfirmedchromophoresofbothmonomeric({CuN3O3}(1),{CuN2O4}(2),{CuN6}(4),{CuN4O2}(5))anddimericcomplex({CuN2O3}(3)).Mostoftheobtainedspeciespos‐sessedadistortedoctahedralenvironment,exceptdimer3,whichconsistedoftwocoppercentreswithsquarepyramidalgeometries.Thewater‐solublecompounds(1,3and5)wereselectedforbiologicaltesting.Theresultsofthestudyrevealedthatcomplex1insolutionsdisplayedbetterradicalscavengingactivitythancomplexes3,5andfreeligands.Therefore,complex1hasbeenselectedforfurtherstudiestotestitsactivityasanenzymemimetic.Thechosencompoundwastestedontheerythrocytelysateoftwogroupsofpatientsafterundergoingchemotherapyandchemoradiotherapy.Theeffectofthetestedcompound(1)onenzymeactivitylevels(TAS,SODandCAT)suggeststhattheselectedcomplexcanbetreatedasafunctionalmimeticoftheenzymes.
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Structural changes of a simple peptide—Trpzip-1—in aqueous solutions and the corresponding hydration phenomena under the influence of temperature
PublicationTrpzip-1, a simple β-hairpin, is a rare example of peptide with stable secondary structure and can be a convenient model to study temperature-related processes that potential prion or amyloid proteins undergo. Although its sequence is simple, the exact processes which the peptide undergoes in aqueous solutions are quite complex and not well understood. The selection of well-established experimental (DSC, FTIR) and theoretical methods...
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Eu3+ doped tellurite glass ceramics containing SrF2 nanocrystals: Preparation, structure and luminescence properties
PublicationEu3+ doped tellurite glass ceramics containing SrF2 nanocrystals were prepared using melt quenching technique and subsequent heat treatment of glass in 370 °C for different time periods. Thermal properties of glass matrix have been determined based on DSC measurements. XRD and XPS results confirmed formation of SrF2 nanocrystals in glass matrices after annealing at 370 °C. FTIR studies revealed absorption bands in the range of...
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Efektywność działania środków przeciwstarzeniowych w procesie przyśpieszonego starzenia cieplnego
PublicationPrzedmiotem przedstawionych badań są wulkanizaty kauczuku naturalnego i butadienowo-styrenowego. Celem pracy było zbadanie efektywności działania środków przeciwstarzeniowych w procesie przyspieszonego starzenia cieplnego (w czasie 7 i 14 dni w temperaturze 70°C). Do badań wykorzystano dwie substancje przeciwstarzeniowe: komercyjnie dostępny przeciwutleniacz IPPD (N–fenylo-N′-izopropylo-p-fenylenodiamina) oraz ekologiczny przeciwutleniacz...
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Modeling and MANOVA studies on toxicity and endocrine potential of packaging materials exposed to different extraction schemes
PublicationThe stability of the linings of packaging that is in contact with the goods stored has been of major concern during decades of the development of packaging materials. In this work, an attempt was undertaken to assess the applicability of using two bioassays (Microtox® and XenoScreen YES/YAS) in estimating the stability of packaging (cans, caps, multilayer material) and the impact of their degradation on the toxicity of some simulated media....
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Wpływ budowy chemicznej na zmiany właściwości mechanicznych i termomechanicznych elastomerów biopoliuretanowych = The influence of chemical structure on mechanical and thermomechanical properties of cast biopolyurethane elastomers
PublicationPrzedmiotem niniejszej pracy są elastomery biopoliuretanowe otrzymywane metodą dwuetapową, tzw. prepolimerową, z wykorzystaniem surowców bio-pochodnych. Zbadano wpływ różnych małocząsteczkowych przedłużaczy łańcucha prepolimerowego: 1,2-biopropanodiolu oraz 1,3-biopropanodiolu na strukturę chemiczną i właściwości mechaniczne (warunki statyczne i dynamiczne) elastomerów biopoliuretanowych. Ponadto, wykorzystano również inny surowiec...
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Investigation of praseodymium and samarium co-doped ceria as an anode catalyst for DIR-SOFC fueled by biogas
PublicationThe Pr and Sm co-doped ceria (with up to 20 mol.% of dopants) compounds were examined as catalytic layers on the surface of SOFC anode directly fed by biogas to increase a lifetime and the efficiency of commercially available DIR-SOFC without the usage of an external reformer. The XRD, SEM and EDX methods were used to investigate the structural properties and the composition of fabricated materials. Furthermore, the electrical...
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Synteza poliuretanu z udziałem biomonomerów i jego recykling chemiczny
PublicationPrzeprowadzono recykling chemiczny (aminoliza i glikoliza) zsyntezowanego wcześniej poliuretanu, otrzymanego z wykorzystaniem surowców pochodzenia naturalnego, oraz zbadano podstawowe właściwości otrzymanych produktów depolimeryzacji chemicznej. Poliuretan otrzymano metodą prepolimerową, wykorzystując surowce pochodzenia naturalnego, czyli poliol PriplastTM 1838 i diizocyjanian TolonateTM X FLO 100. Łańcuchy prepolimeru uretanowego...
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DAF - and collagen-binding properties of chimeric Dr fimbriae
PublicationEkspozycja białek heterologicznych na powierzchni mikroorganizmów jest jedną z nowych strategii stosowanych w mikrobiologii, biotechnologii oraz projektowaniu nowoczesnych szczepionek. W niniejszej pracy zbadano możliwość wykorzystania białka podjednostkowego DraE fimbrii Dr uropatogennych szczepów Escherichia coli jako nośnika heterologicznych sekwencji. W rejon odpowiadający N-terminalnej domenie 2 białka DraE wprowadzono epitopową...
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Metodyka oceny bioolejów
PublicationW artykule przedstawiono procedurę kontroli olejów do smarowania układów tnących pilarek i harwesterów. Potrzeba kontroli wynika z rozporządzenia Dyrektora RDLP w Gdańsku z dnia 28.09.2015r., które dotyczy stosowania biodegradowalnych olejów do smarowania układów tnących. Procedura obejmuje wykonanie wstępnego testu kroplowego z zastosowaniem lampy UV oraz badań laboratoryjnych technikami: cienkowarstwowej chromatografii cieczowej...
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Resonance-Raman spectro-electrochemistry of intermediates in molecular artificial photosynthesis of bimetallic complexes
PublicationThe sequential order of photoinduced charge transfer processes and accompanying structure changes were analyzed by UV-vis and resonance-Raman spectroscopy of intermediates of a Ru(II) based photocatalytic hydrogen evolving system obtained by electrochemical reduction.
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Risk sharing in the construction work contracts
PublicationBy signing a contract for construction works each of the parties assumes a specific scope of responsibility. In practice, there are numerous examples of contractual provisions that violate the parties’ safety and the balance of fair and even distribution of risk. Asymmetry in risk allocation in construction contracts and its consequences is the most common cause of disputes between the parties. The article presents the issue of...
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Morphological and electrochemical characterization of ceramic carbon foam electrodes water treatment applications
Open Research DataThis dataset contains morphological and electrochemical characterization of ceramic carbon foam employed as an electrode (CFFE) for the oxidation of a target pollutant. The dataset includes: