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Wyniki wyszukiwania dla: N2O
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Electron-scattering total cross sections for triatomic molecules: NO2 and H2O
PublikacjaZmierzono całkowite przekroje czynne na rozpraszanie elektronów na drobinach NO2 i H2O, odpowiednio w zakresie energii od 3 do 370 eV oraz 0,5 do 370 eV. Dla średniej energii zderzenia obliczono ponadto przekroje na rozproszenie sprężyste i jonizację.
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Electron-difusion coefficiens in N2O
PublikacjaW pracy przedstawiono wyniki pomiarów stosunku współczynników dyfuzji poprzecznych i podłużnych do ruchliwości i prędkość dryfu elektronów jako funkcję zredukowanego pola elektrycznego w N2O. Współczynniki dyfuzji wyznaczono stosując metodę Towsenda-Huxleya; prędkość dryfu otrzymano używając techniki Bradbury-Nielsen. Całkowitych i częściowych przekrojów czynnych użyto do obliczenia współczynników metodą numeryczną.
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Semiempirical analysis of electron scattering cross sections in N2O and CO2.
PublikacjaPorównano współczynniki transportu wyznaczone doświadczalnie w eksperymentach rojowych z wyznaczonymi teoretycznie z rozwiązania równania Boltzmana dla N2O i CO2. Badano wpływ przekrojów czynnych na wzbudzenia wibracyjne w tych gazach, w zakresie niskich energii na zgodność tych współczynników transportu.
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Electron scattering on N2O - from cross section to diffusion coefficients.
PublikacjaW pracy przedstawiono wyniki pomiarów współczynników transportu: stosunek współczynnika dyfuzji w kierunku prostopadłym do pola elektrycznego do ruchliwości, stosunek współczynnika dyfuzji podłużnej do ruchliwości oraz prędkość dryfu elektronów w funkcji zredukowanego pola elektrycznego. Współczynniki zmierzono metodą Townsenda-Huxley´a a prędkość dryfu otrzymano wykorzystując metodę Bradbury - Nielsena. Zmierzone współczynniki...
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Early stages of condensation from the gaseous phase in a H2O-N2 system: a molecular dynamics study.
PublikacjaW pracy przedstawiono wyniki symulacji wczesnych etapów kondensacji z fazy gazowej w układzie xH2O (1-x)N2. Przeanalizowano całkowitą liczbę klastrów, średni rozmiar klastra i rozmiar klastra maksymalnego w funkcji czasu.
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Miary NAO - uwagi na temat "wskaźników NAO"
PublikacjaW pracy omówiono rodzaje i sposoby obliczania wskaźników NAO, ich zalety i wady wynikające z różnych okresów standaryzacji. Omówiono wpływ stosowanego indeksu na wielkość związków temperatury powietrza w Polsce z NAO.
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Modeling N2O behavior during denitrification with different carbon sources and electron acceptors
PublikacjaA mathematical model was developed for identification of the most important mechanism leading to nitrous oxide (N2O) accumulation in denitrifying activated sludge systems. The activated sludge model No. 2d (ASM2d) was extended to include intermediate three steps of the denitrification process. The formation and accumulation of nitric oxide (NO) was assumed to be very low in the performed laboratory experiments. These experiments...
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Advances in analysis, quantification and modelling of N2O emission in SBRs under various DO set points
PublikacjaNitrous oxide (N2O), considered a major greenhouse gas (GHG) in wastewater treatment plants (WWTPs), is produced during both nitrification and denitrification processes; hence, it needs to be controlled by internal and external strategies. Various factors, such as DO, temperature, and pH, could be incorporated into the mitigation of emissions in WWTPs. In this research, potential operational strategies were investigated in order...
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Model-based identification of the dominant N2O emission pathway in a full-scale activated sludge system
PublikacjaActivated sludge models (ASMs), extended with an N2O emission module, are powerful tools to describe the operation of full-scale wastewater treatment plants (WWTPs). Specifically, such models can investigate the most contributive N2O production pathways and guide towards N2O and carbon footprint (CF) mitigation measures. A common practice is to develop and validate models using data from a single WWTP. In this study, a successfully...
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Optimization of the Aeration Strategies in a Deammonification Sequencing Batch Reactor for Efficient Nitrogen Removal and Mitigation of N2O Production
PublikacjaIn deammonification systems, nitrite-oxidizing bacteria (NOB) suppression and nitrous oxide (N2O) mitigation are two important operational objectives. To carry out this multivariable analysis of response, a comprehensive model for the N cycle was developed and evaluated against experimental data from a laboratory-scale deammonification granular sludge sequencing batch reactor. Different aeration strategies were tested, and the manipulated...
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Impact of soluble organic matter and particulate organic matter on anammox system: Performance, microbial community and N2O production
PublikacjaIn this study, the effects of soluble readily biodegradable COD (sCOD) and particulate slowly biodegradable COD (pCOD) on anammox process were investigated. The results of the longterm experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity, to reach as high as 84.9% ±2.8% TN removal efficiency. Partial denitrification-anammox (PDN/anammox) and denitrification were proposed...
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Model-Based Evaluation of N2O Production Pathways in the Anammox-Enriched Granular Sludge Cultivated in a Sequencing Batch Reactor
PublikacjaA mechanistic model was developed as an extension of the Activated Sludge Model No. 1 to describe three nitrous oxide (N2O) production pathways in a laboratory-scale anammox-enriched granular sequencing batch reactor. Heterotrophic denitrification and two processes mediated by ammonia oxidizing bacteria (AOB), that is, ammonia (NH4+) oxidation via hydroxylamine (NH2OH) and autotrophic denitrification, were considered. A systematic...
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Application of a hybrid mechanistic/machine learning model for prediction of nitrous oxide (N2O) production in a nitrifying sequencing batch reactor
PublikacjaNitrous oxide (N2O) is a key parameter for evaluating the greenhouse gas emissions from wastewater treatment plants. In this study, a new method for predicting liquid N2O production during nitrification was developed based on a mechanistic model and machine learning (ML) algorithm. The mechanistic model was first used for simulation of two 15-day experimental trials in a nitrifying sequencing batch reactor. Then, model predictions...
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Activation of N2O and SO2 by the P–B Bond System. Reversible Binding of SO2 by the P–O–B Geminal Frustrated Lewis Pair
PublikacjaHerein, we present the first transformation of borylphosphine into borylphosphinite using nitrous oxide. Borylphosphine reacts with N2O via insertion of a single oxygen atom into the P−B bond and formation of a P−O−B bond system. Borylphosphine and borylphosphinite capture SO2 and activate it in an irreversible and reversible manner, respectively.
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FURTHER REMARKS ON THE NEO-CLASSICAL NAVIER-STOKES EQUATIONS
PublikacjaThe seminal Navier-Stokes equations have been stated yet before creation of principles of thermodynamics and the first and second laws. In the literature there is the common opinion that the Navier-Stokes equations cannot be taken as a thermodynamically correct model of “working fluid” which is able to describe transformation of “ heat” into “work” and vice versa. Therefore, in the paper, a new exposition of thermodynamically...
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Electronic conductivity in Na2O-FeO-P2O5 glasses. oz.
PublikacjaZbadano przewodnictwo stałe i zmiennoprądowe w szkłach: 50P2O5-(50-x)FeO-xNa2O i 50P2O5-(50-x)FeO-xCaO, gdzie x zmieniano od 7 do 20mol%. Wykazano,że zamiana CaO na Na2O w małym stopniu zmienia przewodnictwo elektryczne szkieł, co sugeruje, że przewodnictwo w szkłach zawierających Na2O ma charakter elektronowy. Do badania procesów migracji elektronów i jonów zastosowano metodę tarcia wewnętrznego. W widmie tarcia wewnętrznego...
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Promotion of borophene/NiO-based electrocatalyst for oxygen evolution reaction
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Promotion of borophene/NiO-based electrocatalyst for oxygen evolution reaction
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Effect of operating conditions on N 2 O production in an anammox sequencing batch reactor containing granular sludge
PublikacjaNitrous oxide (N2O) is one of the gases with the greatest impact in the atmosphere due to its persistence and significant contribution to the greenhouse effect. This study provides an insight into the dynamics of N2O production in wastewater nitrogen removal systems. A 10 L sequencing batch reactor containing enriched anammox biomass was subjected to different operational conditions, i.e., temperature, feed time, NO2 /NH4 þ ratio...
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The Relationship between Gene Activity and Nitrous Oxide Production during Nitrification in Activated Sludge Systems
PublikacjaNitrite is an important factor which inhibits the first stage of the nitrification, the effect is stronger with the decrease of the DO concentrations. NO2- presence at concentration above 15 mg N – NO2 in the aeration tanks stimulates N2O production regardless of the DO concentration. The significant nirS gene induction, observed especially during the experiments with the nitrite addition indicates that N2O production is basically...
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Kinetics of aquation of [Co(ODA)(H2O)3] induced by Fe(III)
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Laser patterned platform with PEDOT–graphene composite film for NO2 sensing
PublikacjaThis work presents a simple and fully electrochemical route used for fabricating of a NO2 gas sensor made of reduced-graphene-oxide-poly(3,4-ethylenedioxythiophene) composite film. The sensing platform was fabricated from alumina substrate and equipped with gold interdigitated electrodes and built-in heater.The temperature distribution on the surface of interdigitated electrodes was investigated by a thermalimaging camera and compared...
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Conductivity and viscosity changes of imidazolium ionic liquids induced by H2O and CO2
PublikacjaSeveral solutions of ionic liquids based on 1-ethyl-3-methylimidazolium cation saturated and unsaturated with carbon dioxide were prepared and characterized by electrochemical impedance spectroscopy. The in fluence of ILs saturation on its electrical conductivity was determined. Additionally, the in fluence of the water presence and variations of temperature on electrical properties of ionic liquids were investigated. Changes of...
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Electrical properties of Na2O-CaO-P2O5 glasses doped with SiO2 and Si3N4
PublikacjaSodium-calcium-phosphate glasses doped with SiO2 or Si3N4 having similar sodium ion concentrations were prepared by melt quenching. The conductivity was measured by impedance spectroscopy under nitrogen atmosphere in a wide frequency range (10 mHz–1 MHz) and wide temperature range (153–473 K). At 36.6 °C, DC conductivities of all glasses vary between 1.1 ∗ 10−12 and 8.9 ∗ 10−12 S cm−1 and have similar activation energies (between...
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An improved preparation of N2-tert-butoxycarbonyl- and N2-benzyloxycarbonyl-(S)-2,4-diaminobutanoic acids.
PublikacjaN-Benzyloksykarbonylo i N-tert-butoksykarbonylo-(S)-asparaginę przekształcono do odpowiednio chronionego kwasu (S)-2,4-diaminobutanowego z dobrą wydajnością, w reakcji z octanem jodobenzenu w temp. 0 st.C w mieszaninie tetrahydrofuranu i wody.
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DFT and NBO theoretical study of protonation of tri-tert-butoxysilanethiol and its anion
PublikacjaWykonano obliczenia kwantowo-chemiczne metodą DFT dla tri-tert-butoksysilanotiolu oraz jego protonowanych i deprotonowanych form, zarówno na atomie tlenu jak i siarki. Przeanalizowano bilans energetyczny dla protonowania anionu w próżni i w fazie wodnej (stosując model IPCM). Zaobserwowano skrócenie wiązania Si-S w wyniku protonowania na atomie tlenu. Zmiany długości wiązań Si-O i Si-S zostały zinterpretowane w oparciu o analizę...
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Tetrahydrofuran-kO bis(tri-tert-butoxysilanethiolato-k2O,S)chromium(II)
PublikacjaTytułowy związek jest pierwszym silanotiolanowym kompleksem chromu(II). Atom chromu jest koordynowany przez 0,S-chelatujący tri-tert-butoksysilanotiolanowy ligand oraz dodatkowy ligand - czasteczkę tetrahydrofuranu. Geometrię ligandów wokół atomu chromu można opisać jako piramidę o podstawie kwadratu, z czasteczką tetrahydrofuranu w pozycji wierzchołkowej. Związek ten posiada dwukrotną oś symetrii.
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Właściwości elektrochemicznego czujnika NO2 wykorzystującego kinetykę reakcji na bazie Lisiconu.
PublikacjaW pracy przedstawiono badania elektrochemiznego czujnika gazów wykorzystującego kinetykę reakcji chemicznej. Czujnik wykonany został w technologii grubowarstwowej. Warstwę czynną stanowił elektrolit na bazie Lisiconu. Pomiary prowadzone były w mieszaninach syntetycznego powietrza i dwutlenku azotu o kontrolowanym składzie. Odpowiedź prądowo-napięciowa czujnika zależy od koncentracji NO2. Pokazano wpływ temperatury na właściwości...
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Mass transfer of HCl and H2O across the hydrophobic membrane during membrane distillation
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(2,2'-bipyridine)bis(tri-tert-butoxysilanethiolato-κ2O,S)cadmium(II)
PublikacjaW pracy przedstawiono strukturę heteroleptycznego kompleksu silanotiolanu kadmu(II) z bipirydylem, który krystalizuje w układzie jednoskośnym, w grupie przestrzennej C2/c. Rdzeń kompleksu CdS2O2N2 ze względu na chelatujący charakter reszt silanotiolanowych posiada zniekształconą geometrię oktaedryczną.
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Fluctuation-enhanced and conductometric gas sensing with nanocrystalline NiO thin films: A comparison
PublikacjaNanocrystalline thin films of NiO were prepared by advanced reactive gas deposition, and their responses to formaldehyde, ethanol and methane gases were studied via fluctuation-enhanced and conductometric methods Thin films with thicknesses in the 200–1700-nm range were investigated in as-deposited form and after annealing at 400 and 500 °C. Morphological and structural analyses showed porous deposits with NiO nanocrystals having...
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Spectroscopic study of the decomposition process of tetramethylsilane in the N2–H2 and N2–Ar low pressure plasma
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An NO2 sensor based on WO3 thin films for automotive applications in the microwave frequency range
PublikacjaA microwave system dedicated to the detection of nitrogen dioxide in the harsh environment of the Norway highways is proposed. An optimized transmission line type of sensor coated with a tungsten trioxide thin film that changes its electrical properties under NO2 gas exposure is developed. The sensors' response (S) is given in °/GHz and it is calculated based on wideband measurements. The advantage of wideband measurements in comparison...
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Tailoring of Magnetic Properties of NiO/Ni Composite Particles Fabricated by Pulsed Laser Irradiation
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Ultrathin NiO confined within hollow carbon sphere for efficient electrochemical energy storage
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(1,2-Dimethoxyethane-kO)bis(tri-tert-butoxysilanethiolato-k2O,S)chromium(II)
PublikacjaW tytułowym związku kompleksowym atom chromu jest koordynowany przez jeden z atomów tlenu z cząsteczki 1,2-dimetoksyetanu oraz ligand tri-tert-butoksysilanotiolanowy. Geometrię ligandu wokół atomu chromu można opisać jako piramidę o podstawie kwadratu z cząsteczką 1,2-dimetoksyetanu w pozycji wierzchołkowej.
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Graphene oxide, reduced graphene oxide and composite thin films NO2 sensing properties
PublikacjaA graphene oxide (GO), reduced graphene oxide (RGO) and poly(3,4-ethylenedioxytiophene)-reduced graphene oxide (PEDOT-RGO composite) gas sensors were successfully fabricated using an electrodeposition method. The electrodeposition was carried out in aqueous GO dispersions. To obtain RGO and PEDOT-RGO, the electrochemical reduction of GO and PEDOT-GO was carried out in 0.1 M KCl at a constant potential of −0.85 V. The GO, RGO and PEDOT-RGO...
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Design and thermodynamic analysis of an H2O–LiBr AHP system for naval surface ship application
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Study of the NO2 sensing mechanism of PEDOT-RGO film using in situ Raman Spectroscopy
PublikacjaIn this work, the mechanism of the NO2 reaction with PEDOT-RGO composite film has been investigated via in situ Raman spectroscopy. Reduced graphene oxide (RGO), poly(3,4-ethylenedioxytiophene)-reduced graphene oxide (PEDOT-RGO) and poly(3,4-ethylenedioxytiophene)/ClO4− (PEDOT/ClO4−) films were fabricated using an electrodeposition method and used as resistance sensors of gaseous nitrogen dioxide. The experimental results indicate...
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Graphene oxide, reduced graphene oxide and composite thin films NO2 sensing properties
PublikacjaA graphene oxide (GO), reduced graphene oxide (RGO) and poly(3,4-ethylenedioxytiophene)- reduced graphene oxide (PEDOT-RGO composite) gas sensors were successfully fabricated using an electrodeposition method. The electrodeposition was carried out in aqueous GO dispersions. In order to obtain RGO and PEDOT-RGO, the electrochemical reduction of GO and PEDOT-GO was carried out in 0.1 M KCl at constant potential of −0.85 V. The GO, RGO...
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Effect of Nb and Al on in vitro dissolution behavior and structure of Na2O-MgO CaO-P2O5 glasses
PublikacjaIn vitro dissolution, structure, and thermal properties of the glass series Na2O-MgOsingle bondCaOsingle bondNb2O5 -Al2O3-P2O5 were studied. The dissolution behavior in phosphate-buffered saline (PBS) confirmed the potential bioactive properties of tested glasses. The dissolution process was found to depend on the Al, Nb, and Mg contents. Al, respectively, suppresses the Nb and accelerates the Mg release process from the glasses....
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The Main Buildings of Technical Universities in Lviv, Warsaw, Gdańsk and Wrocław. Neo-Renaissance „Architecture parlante”
PublikacjaThe article compares the buildings of historical campuses of four technical universities located in areas related to Polish culture. At the turn of the 19th and 20th centuries, several new technical universities were established in Central and Eastern Europe. In 1844, the Technical Academy was opened in Lviv. In 1899, the Russian who were occupying the east and central part of Poland established the Polytechnic Institute in Warsaw....
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DC and AC Conductivity, Biosolubility and Thermal Properties of Mg-Doped Na2O–CaO–P2O5 Glasses
PublikacjaBioactive glasses have recently been extensively used to replace, regenerate, and repair hard tissues in the human body because of their ability to bond with living tissue. In this work, the effects of replacing Na2O with MgO on the electrical, biosolubility, and thermal properties of the target glass 10Na2O–60P2O5–30CaO (in mol%) were investigated. The electrical properties of the glasses were studied with the impedance spectroscopy...
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ATR FT-IR H2O spectra of acidic aqueous solutions. Insights about proton hydration
PublikacjaW artykule podjęto próbę ilościowej analizy widm oscylacyjnych H2O w wodnych roztworach kwasów. Widma H2O dostarczają głównie informacji o stanie strukturalnym cząsteczek wody, wynikającym ze sprzężeń oscylatorów w układzie. Są jednak znacznie trudniejsze w interpretacji niż widma HDO. Widma wodnych roztworów kwasów jednoprotonowych (HCl, HClO4, HPF6) zmierzono posługując się spektroskopią FT-IR w technice osłabionego wewnętrznego...
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Reactions of NO2 with chromium(III) complexes with histamine and pyridoxamine ligands studied by the stopped-flow technique
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Flame retardant effect and mechanism of nanosized NiO as synergist in PLA/APP/CSi-MCA composites
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Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2
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Striking influence of NiO catalyst diameter on the carbonization of polypropylene into carbon nanomaterials and their high performance in the adsorption of oils
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Determination of pseudocapacitance chan ges of nickel oxide NiO electrode with use of dynamic electrochemical impedancje spectroscopy
PublikacjaThe electrochemical capacitors (ECs) are attractive energy storage devices which can be applied in many electronic products (e.g., cameras, laptops, cell phones) or hybrid electric vehicles (HEV). The energy storage in ECs is based on capacitive (the electrical double layer charging/discharging) and pseudocapacitive (additional charge provided by faradic reaction) phenomena. Considering the electrodes exhibiting pseudocapacitance,...
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Ability of paramedics to perform intraosseous access. A randomized cadaver study comparing EZ-IO® and NIO® devices
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