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Wyniki wyszukiwania dla: FLUOREN
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Studies on fluorene stability in different liquid media. Badania stabilności fluorenu w środowiskach ciekłych.
PublikacjaPrzedstawiono degradację fluorenu w różnych rozpuszczalnikach (acetonitryl,metanol, woda, DMSO, heksan, cykloheksan). Proces monitorowano przy zastosowaniu techniki HPLC-DAD-MS. Zbadano wpływ światła, bakterii i temperatury.Zidentyfikowano produkty degradacji jakimi okazał się kwas salicylowy oraz g-fluorenon.
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JOURNAL OF FLUORINE CHEMISTRY
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Chlorido(η5-cyclopentadienyl)[(4a,4b,8a,9,9a-η)-fluorenyl](fluorenyl-κC9)zirconium(IV) toluene solvate
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A Convenient Way to Methylated 2-Imidazolines. Syntheses of Fluorene and Triazine Cyclic Diamidines
PublikacjaOne N-methyl- and 4-substituted 2-imidazolines are described. Fluorene bisimidazolines were obtained in good yield (64-92%), starting from 2,7-dicyanofluorene and ammonium sulfide. In a two-step procedure the crude bisthioamide was reacted with excess diaminoalkane-ethanol (1:1 mixt.) in an oil bath. This new procedure is superior over std. methods. For the sake of comparison, a new triazine bisimidazoline (I) was prepd. by...
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The Influence of Fluorine on the Disturbances of Homeostasis in the Central Nervous System
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Absence of superconductivity in fluorine-doped neptunium pnictide NpFeAsO
PublikacjaX-ray diffraction, specific heat, magnetic susceptibility and inelastic x-ray scattering measurements on the transurarium oxypnictides NpFeAsO and NpFeAsO0.85F0.15 are presented. No superconductivity down to 2 K was observed upon fluorine doping, contrary to the structurally analogous rare-earth pnictides. No modification of the phonon density of states was observed upon doping with fluorine. We discuss our results in light of...
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Wybrane właściwości posadzki cementowej modyfikowanej nanocząstkami fluorku cyny
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Mitteilungen des Kunsthistorischen Instituts in Florenz
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Functional fluorine-doped tin oxide coating for opto-electrochemical label-free biosensors
PublikacjaSensors operating in multiple domains, such as optical and electrochemical, offer properties making biosensing more effective than those working in a single domain. To combine such domains in one sensing device, materials offering a certain set of properties are required. Fluorine-doped tin oxide (FTO) thin film is discussed in this work as functional optically for guiding lossy modes and simultaneously electrochemically, i.e....
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The Effect of Titanium Oxyfluoride Morphology on Photocatalytic Activity of Fluorine-Doped Titanium(IV) Oxide
PublikacjaTitanium oxyfluoride (TiOF2) is a metastable product that can be obtained in a fluorine-rich environment. This material can also be a valuable precursor in the synthesis of titanium(IV) oxide (TiO2). However, the effect of TiOF2 morphology on the physicochemical properties of TiO2 has not been studied so far. In this work, single-phase TiOF2 was prepared by a solvothermal method. The as-synthesized samples exhibited a variety of...
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Fluorine ions in photocatalysts’ synthesis: an obstacle or an ally? The investigation of photocatalysts in Ti-O-F system
PublikacjaTitanium(IV) oxide (TiO2) is one of the most promising photocatalysts, which is expected to be applied in the photocatalytic degradation of xenobiotics. For sustainable development and green chemistry approach recently, much effort has been paid to enhance TiO2 photocatalytic activity in UV-vis light by modifying its structure. The photocatalytic process’s complexity cannot be simply described as electron-hole pairs generations...
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Non-toxic fluorine-doped TiO2 nanocrystals from TiOF2 for facet-dependent naproxen degradation
PublikacjaIn the present study, the photocatalytic degradation of naproxen (NPX), which is a nonsteroidal anti-inflammatory drug (NSAID), frequently detected in drinking water, was investigated. The F-doped TiO2 with defined morphology was successfully obtained from TiOF2 and applied for photocatalytic degradation under UV-vis and visible light. All samples were characterised by X-ray diffraction, scanning electron microscopy, X-ray photoelectron...
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Determination of fluoride as fluorosilane derivative using reversed-phase HPLC with UV detection for determination of total organic fluorine
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Ernst Florens Fridrich Chladni (Chladny?): Who was he; where was he from; and what is he still famous for?
PublikacjaFigury Chladnego są bardzo często stosowane do zobrazowania drgań. Kim był człowiek, którego imieniem są nazywane różne postaci drgań. Przedstawiono, przykłady zastosowań figur Chladnego w przerobie drewna, szczególnie w jego przecinaniu, do wyznaczania prędkości krytycznych pił tarczowych. Ponadto, zaprezentowano jego wkład w rozwój instrumentów muzycznych.
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Tuning of the Electrochemical Properties of Transparent Fluorine-doped Tin Oxide Electrodes by Microwave Pulsed-plasma Polymerized Allylamine
PublikacjaWe report here the dry, one-step, and low-temperature modification of FTO surfaces using pulsed plasma polymerization of allylamine (PPAAm). PPAAm/FTO surfaces were characterized by X-ray photoelectron spectroscopy, spectroscopic ellipsometry, and contact angles to understand the morphological, structural, and optical properties. FTO were coated with a very thin layer of adherent cross-linked, pinhole-, and additive-free allylamine...
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Chlorido(η5-cyclopentadienyl)- [(4a,4b,8a,9,9a-η)-fluorenyl](fluorenylκC9)zirconium(IV) toluene solvate
PublikacjaTematem publikacji jest kompleks zyrkonu z ligandami fluorenylowymi. Otrzymany związek uzyskano w postaci monokrystalicznej i przy pomocy rentgenowskiej analizy strukturalnej wyznaczono strukturę tego związku.
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Nano Tin/Tin Oxide Attached onto Graphene Oxide Skeleton as a Fluorine Free Anode Material for Lithium-Ion Batteries
PublikacjaHerein, we show a composite formation method of tin/tin oxide nanoparticles with graphene oxide and CMC based on laser ablation technique as an electrode material for energy storage devices. The material exhibited a three-dimensional conducting graphene oxide network decorated with tin or tin oxide nanoparticles. The structure, homogeneous distribution of nanoparticles, and direct contact between inorganic and organic parts were...
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Synthesis, characterization, and application of 2D/2D TiO2-GO-ZnFe2O4 obtained by the fluorine-free lyophilization method for solar light-driven photocatalytic degradation of ibuprofen
PublikacjaIn this study, we report the potential of 2D/2D TiO2- GO-ZnFe2O4 photocatalyst obtained using the fluorine-free lyophilization technique for the degradation of ibuprofen belonging to the group of active pharmaceutical ingredients (API). The improved ibuprofen degradation under simulated solar light was achieved in the presence of a composite of 2D TiO2 combined with GO and embedded ZnFe2O4, which additionally provides superparamagnetic...
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Preparation and evaluation of 1,3-alternate 25,27-bis-(pentafluorobenzyloxy)-26,28-bis-(3-propyloxy)-calix[4]arene-bonded silics gel high performance liquid chromatography stationary phase
PublikacjaA 1,3-alternate 25,27-bis-(pentafluorobenzyloxy)-26,28-bis-(3-propyloxy)-calix[4]arene-bonded silica gel stationary phase (CalixBzF10) was synthesized, structurally characterized, and used as a selector in liquid chromatography. The selectivity study of this phase was done by using fluorine-containing compounds (fluorobenzenes, fluoro-pyrimidine bases), as well as non-fluorinated analytes (non-steroidal anti-inflammatory drugs,...
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Electron collisions with nitrogen trifluoride (NF3) molecules.
PublikacjaArtykuł prezentuje zmierzone całkowite przekroje czynne oraz obliczone sprężyste i jonizacyjne przekroje czynne na rozpraszanie elektronów na drobinach fluorku azotu (NF3) dla niskich i średnich energii zderzenia. Wyniki porównano z dostępnymi cząstkowymi przekrojami czynnymi. W celu zbadania wpływu podstawienia atomów fluoru w miejsce atomów wodoru porównano całkowite przekroje czynne dla NF3 i NH3 (efekt fluorowania).
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Jan Hupka prof. dr hab. inż.
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ortho-Fluorobenzanilides and ortho-fluorothiobenzanilides: Molecular conformations and crystal packing
PublikacjaSeries of 2-fluoro and 2,6-difluorobenzanilides and their thiobenzanilide analogs have been synthesized to investigate the influence of the fluorine atom on their crystal structures and self-assembly in the crystal lattice. The X-ray analysis of the single crystal revealed that the synthesized molecules adopt a geometry being deflected from planarity. The deflection was investigated by analysis of dihedral angles between mean planes...
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Stability studies of selected polycyclic aromatic hydrocarbons in different organic solvents and identification of their transformation products
PublikacjaGłównym problemem w laboratoriach analitycznych jest konserwacja próbek i ekstraktów przeznaczonych do analizy. Rozpatrując procesy degradacji z analitycznego punktu widzenia i związanej z tym wiarygodności uzyskiwanych wyników pod uwagę należy wziąć wpływ procesów degradacji w badanym elemencie środowiska na poziom stężenia składników śladowych; wpływ tych samych procesów na poziom składników śladowych w już pobranych próbkach...
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XRD and electrochemical results for MoO3 films deposited using pulsed laser deposition system
Dane BadawczeThe attached data contains XRD and electrochemical results for MoO3 films deposited on fluorine-doped tin oxide glasses. Films were deposited using a pulsed laser deposition system at different conditions. Part of the samples was deposited at room temperature and then annealed at 575°C for given times (samples labeled PLD_RT_575C_xmin, where x stands...
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Przedmiot wyrównawczy - Analityk Danych - Matematyka II st.
Kursy OnlineKurs do przedmiotu wyrównawczego dla studentów kierunku Matematyka st. II sem. I Osoba odpowiedzialna za przedmiot: dr hab. Karol Dziedziul Osoby współprowadzące zajęcia: mgr Wiktor Florek email: wikflore@pg.edu.pl, inne dane do kontaktu wkrótce godz. konsultacji: poniedziałek po zajęciach (zdalnie - czat/rozmowa wideo na Teamsie lub Skypie)
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Małgorzata Pruszkowska-Caceres dr hab.
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Application of surface active amino acid ionic liquids as phase-transfer catalyst
PublikacjaFive structurally related morpholinium derived ionic liquids containing N-acetyl-glycinate anion were synthesized and their thermal stability, surface properties and activity as phase transfer catalysts investigated. The thermal properties were studied by differential scanning calorimetry, while the adsorption at the air/water interface and micellization behavior was analyzed by surface tension measurements, conductometry and isothermal...
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Relation ship between electron scattering grand total and ionization totalcross section.
PublikacjaZaproponowano funkcję wiążącą całkowity przekrój czynny i jonizacyjny przekrój czynny na rozpraszanie elektronów na prostych drobinach węglowodorowych i perfluorowanych. Posługując się znalezioną relacją wyznaczono przekroje czynne dla kilku związków fluoru i wodoru.
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Electron collisions with tetrafluoroethylene (C2F4) and ethylene (C2H4) molecules.
PublikacjaStosując liniową metodę transmisyjną zmierzono całkowite przekroje czynne(TCS) na zderzenie elektronów z drobinami C2F4 w zakresie energii 0.6-370eV.Stwierdzono obecność szerokiego maksimum przy ok. 30eV. Dla porównania zmierzono TCS dla C2H4. Przedyskutowano wpływ podstawienia atomu fluoru w miejsce wodoru.
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Synthesis, physical–chemical properties and in vitro photodynamic activity against oral cancer cells of novel porphyrazines possessing fluoroalkylthio and dietherthio substituents
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High-symmetry compact structures are preferred equilibrium configurations of Li n F n+1 − ( n = 2–5) superhalogen anions
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A metastable [(MgF3)2]2− dianion composed of two superhalogen anions
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A DFT computational study on the molecular mechanism of the nitro group migration in the product derived from 3-nitro-2-(trifluoromethyl)-2 H -chromene and 2-(1-phenylpropylidene)malononitrile
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Boron Difluoride Complexes of Carbamoyl Meldrum's Acids
Publikacja5-[Hydroxy(aryl/alkylamino)methylene]-2,2-dimethyl-1,3-dioxane-4,6-diones react with BF3•Et2O in mild conditions leading to the formation of boron difluoride complexes of carbamoyl Meldrum's acids. The X-ray structure has been obtained for one representative complex. The obtained new compounds are fairly stable at standard ambient conditions and easily isolable.
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Teoria chaosu, MAT2017
Kursy OnlineTeoria chaosu, MAT2017, kierunek matematyka, studia II stopnia, semestr III
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Generalized Dobrushin Coefficients on Banach Spaces
PublikacjaThe asymptotic behavior of iterates of bounded linear operators (not necessarily positive), acting on Banach spaces, is studied. Through the Dobrushin ergodicity coefficient, we generalize some ergodic theorems obtained earlier for classical Markov semigroups acting on L1 (or positive operators on abstract state spaces).
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Electronic Cigarette Use and Metabolic Syndrome Development: A Critical Review
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Modelling of a 25 kV-50 Hz Railway Infrastructure for Harmonic Analysis
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25 kV–50 Hz railway supply modelling for medium frequencies (0–5 kHz)
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On the size of identifying codes in triangle-free graphs
PublikacjaIn an undirected graph G, a subset C⊆V(G) such that C is a dominating set of G, and each vertex in V(G) is dominated by a distinct subset of vertices from C, is called an identifying code of G. The concept of identifying codes was introduced by Karpovsky, Chakrabarty and Levitin in 1998. For a given identifiable graph G, let gammaID(G) be the minimum cardinality of an identifying code in G. In this paper, we show that for any connected...
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Składniki mineralne
PublikacjaOpisano zawartość w żywności, przyswajalność oraz rolę w organizmie człowieka, tzw. składników mineralnych. Obecnie za składniki mineralne uważane są następujące pierwiastki: wapń, fosfor, siarka, sód, potas, chlor, magnez, żelazo, fluor, krzem, cynk, a także mangan, miedź, selen, jod, molibden, chrom, kobalt i bor.
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Influence of titanium layer on counter electrode on electrical parameters of DSSC
PublikacjaIn this paper the influence of the Ti layer thickness at counter-electrode on electrical parameters of DSSCs was examined. The transparent conductive oxide – less (TCO-less) counter electrodes (CE) with titanium layers and platinum as catalyst on Bk7 glass were prepared. Thin metallic films were deposited by means of magnetron sputtering (titanium) and Pulsed Laser Deposition (platinum). The counter electrode with Pt layer on Fluorine...
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Solvothermal growth of {0 0 1} exposed anatase nanosheets and their ability to mineralize organic pollutants. The effect of alcohol type and content on the nucleation and growth of TiO2 nanostructures
PublikacjaHerein, the series of {0 0 1} exposed anatase nanosheets from HF-assisted solvothermal growth synthesis were obtained. The two-dimensional TiO2 were characterized, including both bulk (XRD, DR-UV–Vis, Mott-Schottky) and surface characteristics (N2 sorption, XPS, SEM) with experimental results compiled with Density Functional Theory (DFT) calculations. The effect of alcohol amount and type was studied, demonstrating the crucial...
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Comparison of PCBs and PAHs levels in European coastal waters using mussels from the Mytilus edulis complex as biomonitors
PublikacjaMussels from the Mytilus edulis complex were used as biomonitors for two groups of organic pollutants: polychlorinated biphenyls (PCBs, congeners: 28, 52, 101, 118, 138, 153 and 180) and polycyclic aromatic hydrocarbons (PAHs, naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, indeno(1,2,3-cd)pyrene,...
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New potent STS inhibitors based on fluorinated 4-(1-phenyl-1H-[1,2,3]triazol-4-yl)-phenyl sulfamates
PublikacjaA series of fluorinated analogs based on the frameworks of 4-(1- phenyl-1H-[1,2,3]triazol-4-yl)-phenyl sulfamates have been synthesized as steroid sulfatase (STS) inhibitors. The design of chemical structures of new potential STS inhibitors was supported by molecular docking techniques to identify potential interactions between inhibitors and amino acid residues located in the STS active site. The STS inhibitory potency was evaluated...
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Analysis of Roughness, the Material Removal Rate, and the Acoustic Emission Signal Obtained in Flat Grinding Processes
PublikacjaIn this work, the analysis of the acoustic emission (AE) signal in grinding processes is addressed. The proposed analysis method decomposes the acoustic signal into three frequency ranges. The total energy of each range is determined, as well as the highest frequency. Different grinding experiments were carried out, according to a full factorial design of experiments (DOE), in which feed speed, depth of cut, and transversal step...
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Anna Florek doktor
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Mariusz Florek
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KTaO3 a perovskite for water and air treatment
PublikacjaPerovskites are inorganic compounds that exhibit dielectric properties. These minerals belong to the crystal ceramics family. These compounds are described by the formula: ABX3 where, A and B are 2, 3 or 4 valuable metal ions, and X is an ion of oxygen or fluorine. An example of perovskite is the compound KTaO3. There are many methods for producing KTaO3, but the hydrothermal method is most commonly used. Perovskites can be characterized...
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Peroxymonosulfate-assisted photocatalytic degradation of artificial sweeteners in water
PublikacjaIn the present study, peroxymonosulfate (PMS) activation was proposed for efficient photocatalytic degradation of aspartame, acesulfame, saccharin, and cyclamate - artificial sweeteners frequently present in wastewaters and surface waters worldwide. The TiO2 nanosheets with exposed {0 0 1} facets were synthesised using the fluorine-free lyophilisation technique as a green concept for the synthesis and used for the photodegradation...