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Search results for: N,N,N’,N’-TETRAMETHYLUREA
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Chemical characterization of wild populations of Brassica oleracea complex species (n=9) for the content of their bioactive compounds
PublicationThe wild species belonging to Brassica oleracea complex species (n=9) are widespread in the Mediterranean basin and represent the relative species of several vegetable crops, such as broccoli, cauliflower, kale, cabbage. They are characterized by the high level of bioactive compounds, such as glucosinolates (GLSs), known for their benefits for human health. Four accessions were evaluated: B. macrocarpa (BM) from Favignana (Trapani),...
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Inhibition of amyloid fibril formation of hen egg white lysozyme by trimethylamine N-oxide at low pH
PublicationIn vitro inhibition of the formation of fibrous aggregates of proteins (amyloids) has gained increasing attention due to the number of diseases associated with protein misfolding and fibrillation. An interesting group of compounds for which pronounced activity against this phenomenon can be expected consists of low molecular weight substances (osmolytes) which have the ability to change protein stability. Here we investigate the...
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Measurements of OF QoS/QoE parameters for media streaming in a PMIPv6 TESTBED WITH 802.11 b/g/n WLANs
PublicationA growing number of mobile devices and the increasing popularity of multimedia services result in a new challenge of providing mobility in access networks. The paper describes experimental research on media (audio and video) streaming in a mobile IEEE 802.11 b/g/n environment realizing network-based mobility. It is an approach to mobility that requires little or no modification of the mobile terminal. Assessment of relevant parameters...
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Spontaneous generation of chirality and chiroptical spectra of N-nitroso-2,4-diaryl-3-azabicyclo[3.3.1]nonanes
PublicationBadane związki o szkielecie 2,4-diarylo-3-azabicyclo[3.3.1]nonanów krystalizują w chiralnej grupie przestrzennej jako konglomeraty, co oznacza że uzyskane, makroskopowej wielkości kryształy można rozdzielić manualnie na dwie grupy zgodnie z asymetrią ich powierzchni. Homochiralne kryształy wybranych enancjomerów zsyntetyzowanych związków poddano badaniom rentgenostrukturalnym oraz zarejestrowano ich widma CD i UV-vis. Konfigurację...
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Effects of Urea and Trimethylamine-N-oxide on the Properties of Water and the Secondary Structure of Hen Egg White Lysozyme
PublicationW celu określenia sposobu hydratacji mocznika i N-tlenku trimetyloaminy, wykorzystano spektroskopię oscylacyjną FTIR. Dane eksperymentalne, otrzymane z pomiarów widm oscylacyjnych wody półciężkiej (HDO) rozcieńczonej izotopowo w wodnych roztworach badanych związków, analizowane były za pomocą "metody widm różnicowych". Strukturalno-energetyczna charakterystyka wody zaburzonej przez cząsteczki osmolitów wskazuje, że woda zaburzona...
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Exploring the Antitumor Efficacy of N-Heterocyclic Nitrilotriacetate Oxidovanadium(IV) Salts on Prostate and Breast Cancer Cells
PublicationThe crystal structures of two newly synthesized nitrilotriacetate oxidovanadium(IV) salts, namely [QH][VO(nta)(H2O)](H2O)2 (I) and [(acr)H][VO(nta)(H2O)](H2O)2 (II), were determined. Additionally, the cytotoxic effects of four N-heterocyclic nitrilotriacetate oxidovanadium(IV) salts— 1,10-phenanthrolinium, [(phen)H][VO(nta)(H2O)](H2O)0.5 (III), 2,2′-bipyridinium [(bpy)H][VO(nta)(H2O)](H2O) (IV), and two newly synthesized compounds...
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Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites
PublicationTailoring the defects in graphene and its related carbon allotropes has great potential to exploit their enhanced electrochemical properties for energy applications, environmental remediation, and sensing. Vertical graphene, also known as carbon nanowalls (CNWs), exhibits a large surface area, enhanced charge transfer capability, and high defect density, making it suitable for a wide range of emerging applications. However, precise...
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Proton transfer reaction from some C–H acids to N-bases in polar aprotic solvents
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Antimicrobial and anticancer photodynamic activity of a phthalocyanine photosensitizer with N -methyl morpholiniumethoxy substituents in non-peripheral positions
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Simple method for two-dimensional deadbeat controller design from N ˙ M impulse response values
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Spin probe dynamics in relation to free volume in crystalline organics from ESR and PALS: N-tridecane
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Oscillatory Mechanism of α-Fe(N) ↔ γ’-Fe4N Phase Transformations during Nanocrystalline Iron Nitriding
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Correcting a widespread error: Neuroprotectant N-acetyl-L-tryptophan does not bind to the neurokinin-1 receptor
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Gdansk 2020, Czarny Dwor (N) street - video data - pedestrian, bicycles, vehicles
Open Research DataThe data contain video traffic data (pedestrian, cyclists, vehicles) registered at Czarny Dwor street. Date 13.08.2020, 6:00-20:00. The video camera was installed around bicycle crossings and pedestrian crossings at Czarny Dwor – Jana Pawla II. Camera was mounted on 7-meter-high mast.
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Carbonic anhydrase inhibitors. Synthesis, and molecular structure of novel series N-substituted N'-(2-arylmethylthio-4-chloro-5- methylbenzenesulfonyl)guanidines and their inhibition of human cytosolic isozymes I and II and the transmembrane tumor-associated isozymes IX and XII
PublicationA series of novel N-substituted N'-(2-arylmethylthio-4-chloro-5-methylbenzenesulfonyl)guanidines 9 e41 have been synthesized and investigated as inhibitors of four isoforms of zinc enzyme carbonic anhydrase (CA.EC 4.2.1.1), that is the cytosolic CA I and II, and cancer-associated isozymes CA IX and XII. Against the human CA I investigated compounds showed KI in the range of 87e6506 nM, toward hCA II ranging from 7.8 to 4500 nM,...
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Electrochemical characterization of a composite comprising PEDOT/PSS and N doped TiO2 performed in aqueous and non-aqueous electrolytes
PublicationNitrogen doped titania (N-TiO2) was used as an inorganic component of composite electrodes containing poly(3,4-ethylenedioxythiophene) with poly(4-styrenesulphonate) PEDOT/PSS/N-TiO2. The composite materials were obtained by direct electrodeposition from an N-TiO2 suspension containing polyelectrolyte (NaPSS) and monomer EDOT. The electrodes were electrochemically tested in aqueous and non-aqueous electrolytes using cyclic voltammetry...
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Kwas stearidonowy C18:4 (n-3) - źródła roślinne i potencjalne znaczenie w żywieniu człowieka
PublicationPrzedmiotem publikacji jest omówienie znaczenia wielonienasyconych kwasów tłuszczowych (WNKT) w żywieniu człowieka, roli kwasu stearidonowego C18:4 n-3 (SDA) w łańcuchu metabolicznym i przedstawienie źródeł olejów roślinnych zawierających SDA. Na celowość stosowania roślinnych źródeł SDA w żywieniu człowieka wskazuje ogólny deficyt długołańcuchowych WNKT n-3 w typowej diecie europejskiej, związany głównie z małą popularnością produktów...
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Inhibition of impurities formation in the synthesis of N-alkyltheobromines stimulated by microwave irradiation. Cationic and anionic response of membrane electrodes
PublicationN-Alkyltheobromine (1-9) derivatives were obtained by reacting theobromine with appropriate alkyl halide under microwave irradiation at 100-150 W and by conventional synthesis. Formation of by-products of oxygen atom alkylation and 1-N-alkyltheobromine ring opening were considered. The presented compounds 1-5 have been studied as ion carriers in ion-selective membrane electrodes. Selectivity of these membranes was studied towards...
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Unexpected Z/E isomerism of N-methyl-O-phosphothioyl benzohydroxamic acids, their oxyphilic reactivity and inertness to amines
PublicationThiophosphinoylation of N-methyl p-substituted benzohydroxamic acids using disulfanes (method A) or diphenylphosphinothioyl chloride (method B) provides only one conformer of the respective O-phosphothioyl derivative (Xray and NMR analysis). Undergoing the P-transamidoxylation reaction is an evidence of the reversibility of thiophosphinoylation. Only those products containing strong EWG substituents in the aroyl residue or bulky...
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Wpływ warunków spawania pod wodą na skłonność stali S355G10+N do tworzenia pęknięć zimnych
PublicationPrzedstawiono wpływ parametrów spawania pod wodą na spawalność stali o podwyższonej wytrzymałości S355G10+N. Pokazano również wpływ zastosowania techniki ściegu odpuszczającego na poprawę spawalności tej stali.
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Ocena jakości dostępnych na rynku suplementów diety zawierających kwasy tłuszczowe z rodziny n-3
PublicationCoraz większą uwagę zwraca się obecnie na uzupełnianie diety w NNKT, zwłaszcza kwasy EPA i DHA z rodziny n-3, w które bogaty jest olej rybi. Zbadano jakość dostępnych na krajowym rynku suplementów diety produkowanych z oleju rybiego w postaci kapsułek żelatynowych, ze szczególnym uwzględnieniem składu kwasów tłuszczowych i stabilności oksydatywnej.
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Synthesis and biological evaluation of N-acylated tyramine sulfamates containing C-F bonds as steroid sulfatase inhibitors
PublicationSteroid sulfatase (STS) is responsible for the hydrolysis of biologically inactive sulfated steroids into their active un-sulfated forms and promotes the growth of various hormone-dependent cancers (e.g., breast cancer). Therefore, the STS enzyme is a promising therapeutic target for the treatment of steroid-sensitive cancers. Herein, we report the synthesis and biological evaluation of sulfamate analogs as potential STS inhibitors...
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Aktywność biologiczna i selektywna toksyczność nowej klasy N-podstawionych pochodnych antybiotyku polienowego Nystatyny A1
PublicationCelem badań, których wyniki zaprezentowano w niniejszej pracy było określenie aktywności biologicznej nowej klasy N–podstawionych pochodnych Nystatyny A1 w stosunku do komórek grzybowych z rodzaju i ssaczych oraz ustalenie wpływu modyfikacji chemicznej na selektywną toksyczność tych związków. W toku wieloletnich prac badawczych zaproponowano, że wprowadzenie podstawnika na grupie aminowej cząsteczki antybiotyku o charakterze objętościowym...
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AKTYWNOŚĆ BIOLOGICZNA I SELEKTYWNA TOKSYCZNOŚĆ NOWEJ KLASY N–PODSTAWIONYCH POCHODNYCH ANTYBIOTYKU POLIENOWEGO NYSTATYNY A1
PublicationCelem badań, których wyniki zaprezentowano w niniejszej pracy było określenie aktywności biologicznej nowej klasy N–podstawionych pochodnych Nystatyny A1 w stosunku do komórek grzybowych z rodzaju i ssaczych oraz ustalenie wpływu modyfikacji chemicznej na selektywną toksyczność tych związków. W toku wieloletnich prac badawczych zaproponowano, że wprowadzenie podstawnika na grupie aminowej cząsteczki antybiotyku o charakterze objętościowym...
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Synthesis and steroid sulfatase inhibitory activities of N-phosphorylated 3-(4-aminophenyl)-coumarin-7-O-sulfamates
PublicationIn the present work, we report convenient methods for the synthesis and biological evaluation of N-phosphorylated derivatives of 3-(4-aminophenyl)-coumarin-7-O-sulfamate as potential steroid sulfatase (STS) inhibitors. Their binding modes were modeled using docking techniques. The inhibitory effects of the synthesized compounds were tested on STS isolated from human placenta. All of the newly synthesised coumarin derivatives were...
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The role of adsorption in decomposition of dyes on TiO2 and N-modified TiO2 photocatalysts under UV and visible light irradiations
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Anti-Helicobacter pylori activities of selected N-substituted cinnamamide derivatives evaluated on reference and clinical bacterial strains
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N-Substituted piperazine derivatives as potential multitarget agents acting on histamine H3 receptor and cancer resistance proteins
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The Study of NADPH-Dependent Flavoenzyme-Catalyzed Reduction of Benzo[1,2-c]1,2,5-oxadiazole N-Oxides (Benzofuroxans)
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Measurements of high-temperature emission spectra of highly irradiated LiF:Mg,Cu,P (MCP-N) TL detectors
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Pd-catalysed general access to 7-membered N/O-heterocyclic compounds as potential agents against inflammation
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Photophysical properties of 3-[2-(N-phenylcarbazolyl)benzoxazol-5-yl]alanine derivatives – experimental and theoretical studies
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AP-MOVPE Technology and Characterization of InGaAsN p-i-n Subcell for InGaAsN/GaAs Tandem Solar Cell
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Ultrashort Cationic Lipopeptides–Effect of N-Terminal Amino Acid and Fatty Acid Type on Antimicrobial Activity and Hemolysis
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Structure and properties of the Ti+Ti(C,N) coatings obtained in the PVD process on sintered high speed steel
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Effect of operating conditions on N 2 O production in an anammox sequencing batch reactor containing granular sludge
PublicationNitrous 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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Comparison of the Properties of Vegetable Oil/Water and n-Tetradecane/Water Emulsions Stabilized by α-Lactalbumin or β-Casein
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Structural and molecular indices in common carp (Cyprinus carpio L.) fed n-3 PUFA enriched diet
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Novel steroid sulfatase inhibitors based on N ‐thiophosphorylated 3‐(4‐aminophenyl)‐coumarin‐7‐O‐sulfamates
PublicationIn the present work, we described convenient methods for the synthesis ofN-thiophosphorylated 3-(4-aminophenyl)-coumarin-7-O-sulfamates as steroid sulfatase(STS) inhibitors. To design the structures of the potential STS inhibitors, molecularmodeling techniques were used. A computational docking method was used to deter-mine the binding modes of the synthesized inhibitors as well as to identify potentialinteractions between specified...
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Estimation of wastewater treatment plant state for model predictive control of N-P remowal at medium time scale.
PublicationPrzy ograniczonych możliwościach pomiarowych estymaty stanu są potrzebne w sterowaniu optymalizującym, opartym na sterowaniu predykcyjnym, sterującym usuwaniem azotu i fosforu, w biologicznej oczyszczalni ścieków. Optymalizator MPC do implementacji sprzężenia zwrotnego z obiektu potrzebuje tych estymat. Dodatkowo aktualizowane muszą być parametry modelu Gray-Box wykorzystywanego w module MPC. Wtedy estymaty stanu są używane przez...
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Molecular heteroconjugation equilibria in (n-butylamine + acetic acid) systems in binary (dimethyl sulfoxide + 1,4-dioxane) solvent mixtures
PublicationWyznaczono stałe kwasowe Ka(HA), Ka(BH+) oraz stałe równowagi KAHA-, KBHE+ i KAHB, w układach (n-butyloamina + kwas octowy) bez przeniesienia protonu w binarnych mieszaninach rozpuszczalników (DMSO + 1,4-dioksan). Wartości stałych wyznaczono z wykorzystaniem metody miareczkowania potencjometrycznego przy stałej sile jonowej. Stwierdzono, iż stałe heterokoniugacji molekularnej w badanych mieszaninach rozpuszczalników są liniowo...
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Programmed metalloporphyrins for self-assembly within light-harvesting stacks: 5,15-dicyano-10,20-bis(3,5-di-tert-butylphenyl)-porphyrinato zinc(II) and its push-pull 15-N,N-dialkylamino-5-cyano congeners obtained by a facile direct amination.
PublicationThe title dicyano compound was synthesized via cyanation and it self-assembles in nonpolar solvents giving red-shifted and broad absorption maxima just as the bacteriochlorophylls which are encountered in the light-harvesting organelles of early photosynthetic bacteria. In the crystal, stacks are formed through a hierarchic combination of π-stacking and a CNZn electrostatic interaction. Push−pull 15-N,N-dialkylamino-5-cyano congeners...
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Struktury supramolekularne z udziałem N,N´-bis(2-pirydylo)arylodiamin.** 2003, 103 s. 45 rys. 4 tab. bibliogr. 101 poz. maszyn. Rozprawa doktorska /19.03.2003/ Wydz. Chem. Promotor: prof. dr. hab. inż. T. Połoński.
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Evaluation of Partial Nitritation/Anammox (PN/A) Process Performance and Microorganisms Community Composition under Different C/N Ratio
PublicationA one-stage partial nitritation/anammox (PN/A) process with intermittent aeration is possible under sidestream conditions, but implementation in a mainstream is a challenge due to increased Carbon/Nitrogen (C/N) ratios in domestic wastewater. This study investigated the effect of C/N ratios on process efficiency and the effect of narrowing non-aeration time on process improvement at high chemical oxygen demand (COD) load. An increase...
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The Effect of Oxygenated Diesel-N-Butanol Fuel Blends on Combustion, Performance, and Exhaust Emissions of a Turbocharged CRDI Diesel Engine
PublicationThe article deals with the effects made by using various n-butanol-diesel fuel blends on the combustion history, engine performance and exhaust emissions of a turbocharged four-stroke, four-cylinder, CRDI 1154HP (85 kW) diesel engine. At first, load characteristics were taken when running an engine with normal diesel fuel (DF) to have ‘baseline’ parameters at the two ranges of speed of 1800 and 2500 rpm. Four a fossil diesel (class...
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Facile synthesis and characterization of graphene and N-doped graphene by CVD method from liquid precursors for promising electrode materials
PublicationIn this study, high-quality and few-layered graphene was synthesized using the chemical vapor deposition (CVD) method from liquid sources. Two different liquid carbon sources, pyridine, and benzene, were used and deposited on nickel foam under heat conditions using a bubbler in a quartz tube. X-ray diffraction (XRD) and Raman analysis confirmed the crystalline properties of graphene and N-doped graphene, demonstrating the high...
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Core–shell excitation of isoxazole at the C, N, and O K-edges – an experimental NEXAFS and theoretical TD-DFT study
PublicationThe near-edge X-ray absorption fine structure (NEXAFS) spectra of the gas-phase isoxazole molecule have been measured by collecting total ion yields at the C, N, and O K-edges. The spectral structures have been interpreted using time-dependent density functional theory (TD-DFT) with the short-range corrected SRC2-BLYP exchange–correlation functional. Experimental and calculated energies of core excitations are generally in good...
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Hybrid analogues of SFTI-1 modified in P1 position by β- and γ-amino acids and N-substituted β-alanines
PublicationA series of compounds containing either non-proteinogenic beta-/gamma-amino acids or N-substituted beta-alanine residues (beta-peptoid units) in P-1 specificity position were synthesized based on the structure of sunflower trypsin inhibitor 1 (SFTI-1). The compounds were synthesized on a solid support; the N-substituted beta-alanines (beta Nhlys and beta Nhphe) were introduced into a peptidomimetic chain via a two-step approach...
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Nickel(II) tri-tert-butoxysilanethiolates with N-heterocyclic bases as additional ligands: Synthesis, molecular structure and spectral studies
PublicationW publikacji przedstawiono metodę syntezy trzech kompleksów silanotiolanowych z takimi N-heterocyklicznymi zasadami jak: pirydyna, 2-metylopirydyna i 3,5-dimetylopirydyna. Dla tych kompleksów przeprowadzono badania X-Ray, analizy elementarnej. Przy pomocy rentgenowskiej analizy strukturalnej wykazano różną koordynację atomu centralnego - niklu.
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Influence of hydrochloric acid concentration and type of nitrogen source on the electrochemical performance of TiO2/N-MoS2 for energy storage applications
PublicationIn this work, nitrogen-doped molybdenum sulfide was directly deposited on titanium dioxide nanotubes substrate (TiO2/N-MoS2) during hydrothermal synthesis. The study focuses on the influence of hydrochloric acid concentration used for the synthesis, with the results indicating its essential role in thioacetamide hydrolysis and thus in the effectiveness of the N-MoS2 deposition. The electrode material itself is characterized by...