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Wyniki wyszukiwania dla: DMSO-WATER COMPLEXES
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Microplastics in water resources: Global pollution circle, possible technological solutions, legislations, and future horizon
PublikacjaBeneath the surface of our ecosystems, microplastics (MPs) silently loom as a significant threat. These minuscule pollutants, invisible to the naked eye, wreak havoc on living organisms and disrupt the delicate balance of our environment. As we delve into a trove of data and reports, a troubling narrative unfolds: MPs pose a grave risk to both health and food chains with their diverse compositions and chemical characteristics....
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Soft X-ray Induced Production of Neutral Fragments in High-Rydberg States at the O 1s Ionization Threshold of the Water Molecule
PublikacjaDissociation of water molecules after soft X-ray absorption can yield neutral fragments in high-Rydberg (HR) states. We have studied the production of such fragments by field ionization and ion time-of-flight (TOF) spectrometry. Neutral HR fragments are created at all resonances below the O 1s ionization potential (IP) and particularly within 1 eV above the O 1s IP. The latter effect is due to the recapture of the O 1s photoelectrons...
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Determination of fuel combustion product in airport runoff water samples using liquid–liquid extraction with gas chromatography–spectrometry
PublikacjaDetermination of xenobiotics in samples of airport runoff water is both a complex and indispensable task due to an increasing threat resulting from the activities of numerous airports. The aim of this study was to develop, optimize, and validate a procedure based on liquid–liquid extraction (LLE) coupled with gas chromatography–mass spectrometry (GC–MS) for the determination of polycyclic aromatic hydrocarbons (PAHs). So far, no...
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Solid phase microextraction–comprehensive twodimensional gas chromatography–time-of-flight mass spectrometry: a new tool for determining PAHs in airport runoff water samples
Publikacjafundamental aspect of airport operations is the pollution caused by airport runoff waters. Polycyclic aromatic hydrocarbons (PAHs) are one of the most important groups of xenobiotics which are commonly found in runoff water originating from airports. Only very limited data on the analysis of airport runoff water have been published until now. Therefore, a reliable and accurate analytical method based on headspace solid-phase microextraction...
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Underwater Electrochemical Offshore Tests of a Paint Coating Applied in Water on the Legs of an Oil Production Platform
PublikacjaThis paper presents the methodology developed for underwater measurements using electrochemical impedance spectroscopy (EIS) technique, aimed at determining the resistance of an epoxy coating applied in seawater to the legs of an oil production platform. Performing such underwater tests in an offshore environment was technically challenging. The results of measurements obtained on the platform were confronted with comparative results...
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Surface water quality assessment by the use of combination of multivariate statistical classification and expert information
PublikacjaThe present study deals with the assessment of surface water quality from an industrial-urban region located in northern Poland near to the city of Gdansk. Concentrations of thirteen chemicals includingtotal polycyclic aromatic hydrocarbons (PAHs), halogenated volatile organic compounds (HVOCs) and major ions in the samples collected at five sampling points during six campaigns were used as variablesthroughout the study. The originality...
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Method for the correlation coefficient estimation of the bottom echo signal in the shallow water application using interferometric echo sounder
PublikacjaThe article presents a new method for the assessment of bottom echo correlation coefficient in the presence of multiple echoes. Bottom correlation coefficient is a parameter that characterizes spatial properties of echo signal. Large variability of the bottom shape or properties (for example caused by the presence of bottom objects) and the presence of the acoustic shadow strongly influence the value of the correlation coefficient....
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Enhanced Toxicity of Bisphenols Together with UV Filters in Water: Identification of Synergy and Antagonism in Three-Component Mixtures
PublikacjaContaminants of emerging concern (CEC) localize in the biome in variable combinations of complex mixtures that are often environmentally persistent, bioaccumulate and biomagnify, prompting a need for extensive monitoring. Many cosmetics include UV filters that are listed as CECs, such as benzophenone derivatives (oxybenzone, OXYB), cinnamates (2-ethylhexyl 4-methoxycinnamate, EMC) and camphor derivatives (4-methylbenzylidene-camphor,...
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Performance tuning of chitosan-based membranes by protonated 2-Pyrrolidone-5-carboxylic acid-sulfolane DES for effective water/ethanol separation by pervaporation
PublikacjaToday, the applicability of deep eutectic solvents (DES) in various fields, including membrane science and technology, is extensively investigated. In pioneering works, we have implemented different DES as a component of chitosan (CS)-based flat membranes for pervaporation (PV) separation. Herein, we present a new protonated (by sulphuric acid) 2-Pyrrolidone-5-carboxylic acid: sulfolane DES, as a green additive for its chemical...
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Protochlorophyll complexes with similar steady-state fluorescence characteristics can differ in fluorescence lifetimes. A model study in Triton X-100
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Polymeric micelle-mediated delivery of half-sandwich ruthenium(II) complexes with phosphanes derived from fluoroloquinolones for lung adenocarcinoma treatment
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(Cyclopentadienyl){(N,N-dimethylaminoethyl)cyclopentadienyl} complexes of zirconium: Crystal structure of [(η5-C5H5)(η5-C5H4CH2CH2NHMe2)ZrCl2]2[ZrCl6]
Publikacja(C5H5)ZrCl3 reaguje z [C5H4-CH2CH2NMe2]Li dając polimer koordynacyjny {(C5H5)(C5H4-CH2CH2NMe2)ZrCl2}n, który z kolei w reakcji z HCl daje żółtozielone kryształy [(η5-C5H5)(η5-C5H4CH2CH2NHMe2)ZrCl2]2[ZrCl6]. Ten ostatni związek został scharakteryzowany za pomocą widm NMR oraz przy użyciu rentgenowskiej analizy strukturalnej. Utworzenie w/w związku wskazuje na oderwanie grup C5H5 oraz C5H4-CH2CH2NMe2 od centrum metalicznego Zr(IV).
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The hypoxia‐induced changes in miRNA‐mRNA in RNA ‐induced silencing complexes and HIF ‐2 induced miRNAs in human endothelial cells
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The Influence of Alkyl Chain Length and Steric Effect on the Stability Constants and Extractability of Co(II) Complexes with 1-Alkyl-2-Methylimidazoles
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Achiral and Chiral Transition Metal Complexes with Modularly Designed Tridentate PNP Pincer-Type Ligands Based on N-Heterocyclic Diamines
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Simultaneous determination of thermodynamic and kinetic parameters of aminopolycarbonate complexes of cobalt(II) and nickel(II) based on isothermal titration calorimetry data
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Copper(II) complexes with substituted imidazole and chlorido ligands: X-ray, UV–Vis, magnetic and EPR studies and chemotherapeutic potential
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1,3,4-Thiadiazole-based diamides: Synthesis and complexation properties
PublikacjaAromatic diamides, derivative of 2,6-pyridinedicarboxylic acid and isophthalic acid, bearing 1,3,4-thiadiazole residue were prepared with satisfactory yields in conventional procedures and microwave stimulated reactions. X-ray structure of N,N-bis (1,3,4-thiadiazol-2-yl)-2,6-pyridinedicarboxamide (2) DMSO solvate (2DMSO) was described. Selective zinc(II), lanthanum(III), terbium(III) and L-tyrosine recognition was found for N,N-bis(1,3,4-thiadiazol-2-yl)-2,6-pyridinedicarboxamide...
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Analysis of GNSS sensed precipitable water vapour and tropospheric gradients during the derecho event in Poland of 11th August 2017
PublikacjaNowadays, one of the techniques that meets the increasing requirements of meteorologist in terms of monitoring of severe weather events is global navigation satellite systems (GNSS), which can provide information about the tropospheric state independently of the weather conditions and even in real time. In this paper we present the usage of GNSS sensed tropospheric data to monitor sudden and intense weather events. Our analyses...
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The bismuth vanadate thin layers modified by cobalt hexacyanocobaltate as visible-light active photoanodes for photoelectrochemical water oxidation
PublikacjaBismuth vanadate thin films deposited using the pulsed laser deposition technique were modified using cobalt hexacyanocobaltate (Cohcc). The 2-step method of Cohcc nanocubes preparation was applied: i) metallic cobalt deposition and ii) cobalt electrooxidation in Co(CN)63− containing electrolyte. The presence of CN stretching vibrations was confirmed by Raman spectroscopy. The energy band gap was equal to 2.5 eV and was estimated...
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Synergistic effects of a swirl generator and MXene/ water nanofluids used in a heat exchanger pipe of a negative CO2 emission gas power plant
Publikacjafocus on optimizing heat exchangers contributes to improved temperature control mechanisms, ensuring the sustainable operation of innovative power plants working towards negative CO2 emissions. In the realm of oxy-combustion within Negative CO2 Emission Power Plants (nCO2PP), the temperature of combustion products surpasses 3000 (K). Addressing this challenge, the imperative arises to reduce these elevated temperatures to a manageable...
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Seashore sediment and water chemistry at the Admiralty Bay (King George Island, Maritime Antarctica) – geochemical analysis and correlations between the concentrations of chemical species
PublikacjaThis study covers water and sediment chemical characteristics by the western shore of Admiralty Bay (King George Island, Antarctica) in 2016. Chemical processes between sediment and water have been described based on the determination of ions, metals, non-metals, and TOC concentrations. Rock weathering is an important source of Fe, Ni, Co, Al in the seashore area. The PCA shows the impact of acidification in the release metals...
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Wpływ warunków hydraulicznych w sieci wodociągowej na wtórne zanieczyszczenie wody = Effect of hydraulic conditions in the water distribution system on the secondary water pollution
PublikacjaCelem badań jest próba empirycznego wykazania wpływu zmian prędkości i czasu przebywania wody w przewymiarowanej sieci wodociągowej na wtórne jej zanieczyszczenie. Podstawą analizy są pomiary hydrauliczne wykonane podczas realizacji płukania rurociągów żeliwnych D=100 mm oraz badania laboratoryjne popłuczyn w zakresie suchej pozostałości, w tym zawartości związków żelaza. Każdą pobraną próbkę popłuczyn z hydrantów poddano szczegółowej...
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A small-signal sound speed and parameter of non-linearity B/Ain a ternary mixture. Examples of calculations of mixture consisting of air, water and water vapor
PublikacjaZostało wyliczone zaburzenie entropii z dokładnością do członów nieliniowych rzędu drugiego. Jedyne założenie ograniczające, toże para wodna i powietrze są gazami doskonałymi. Ostatecznie,parametr nieliniowości i prędkość fali akustycznej przedstawione jako rodzinę krzywych, zależnych od trzech parametrów. Przedstawiono ilustrację tych zależności.
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Multiprocessor implementation of Parallel Multiobjective Genetic Algorithm for Optimized Allocation of Chlorination Stations in Drinking Water Distribution System - a new water quality model approach
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Evaluation of Langmuir and Freundlich Isotherms for Removal of Cephalexin and Tetracycline Antibiotics By Sistan Sand from Water and Wastewater Samples
PublikacjaIn this research, Sistan sand was used as a natural and inexpensive sorbent for removal of cephalexin and tetracycline antibiotics from water and wastewater samples. For a concentration 60.0 mg L-1 of cephalexin, optimum removal conditions were: pH of the sample 3.0, adsorbent amount 1.0 g, contact time 20.0 min, added amount of sodium chloride to adjust the ionic strength of the solution 7.0 g L-1. Langmuir isotherm was the best...
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Time series analysis and impact assessment of the temperature changes on the vegetation and the water availability: A case study of Bakun-Murum Catchment Region in Malaysia
PublikacjaThe Bakun-Murum (BM) catchment region of the Rajang River Basin (RRB), Sarawak, Malaysia, has been under severe threat for the last few years due to urbanization, global warming, and climate change. The present study aimed to evaluate the time series analysis and impact assessment of the temperature changes on the vegetation/agricultural lands and the water availability within the BM region. For this purpose, the Landsat data for...
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Research on water lubricated main shaft bearings in conditions of improper lubrication and cooling conducted on high torque real-life scale bush test rig
PublikacjaWater lubricated polymer bushes find increasingly popular use in the sliding bearings of marine propellers, water turbines and pump shafts. Such popularity is partly due to their simple construction which also means relatively affordable price. In addition, properly designed and installed water lubricated bearings may well last for over a decade. However, in practical experience one may also observe cases of rapid wear...
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Portable reactor with LTCC electrodes for production of plasma activated water
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Determination of metronidazole residues in water, sediment and fish tissue samples
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Structure and function of natural proteins for water transport: general discussion
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Robust Estimation of Integrated Hydraulics and Parameters in Water Distribution Systems
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Heat calculations for water-cooled radiators of the inverter for induction heating
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Cylindrospermopsin: Water-linked potential threat to human health in Europe
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Accuracy and parameter estimation of elastic and viscoelastic models of water hammer
PublikacjaW artykule analizowany jest zagadnienie uderzenia hydraulicznego, stanowiące jeden z najważniejszych problemów nieustalonego przepływu w przewodach pod ciśnieniem. Mimo ponad stuletnich doświadczeń w badaniach zagadnienie to jest ciągle nie w pełni rozpoznane. Może być onio rozpatrywane na dwóch płaszczyznach - praktycznej i teoretycznej. W obu przypadkach na etapie rozwiązania powstają problemy sprawiające, że wyniki nie są satysfakcjonujące....
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Dynamics of Topology-dependent Water Purification by Siliceous Zeolite Membranes
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HYPONATREMIA & WATER INTOXICATION WITH CARBAMAZEPINE: A RARE CASE REPORT.
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HYPONATREMIA & WATER INTOXICATION WITH CARBAMAZEPINE: A RARE CASE REPORT.
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PF5 and PCl5 interacting with water – Comparative study at the molecular level
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Polymers (Polyvinylpyrrolidones) As Active Additives Modifying the Lubricating Properties of Water
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UV/VIS light-enhanced photocatalysis for water treatment and protection
PublikacjaPraca zawiera wyniki badań nad zaawansowanymi metodami fotokatalitycznymi w aspekcie degradacji zanieczyszczeń w fazie ciekłej. Fenol i chlorowane pestycydy zostały zastosowane jako związki modelowe. Równocześnie prowadzono badania dotyczące ścieków pestycydowych. Rozważane układy: UV/TiO2 w zawiesinie lub osadzony na szklanych mikrosferach oraz UV/H2O2/powietrze. Poprzez modyfikację tlenku tytanu(IV) pierwiastkami niemetalicznymi...
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Fog water chemical composition in different geographic regions of Poland
PublikacjaPróbki wody z mgły pobierane były w latach 2005-2006 na terenie Szrenicy, Zakopanego i Borucina. Analiza statystyczna ujawniła znaczące różnice w składzie chemicznym próbek wody z mgły w zależności od regionu geograficznego, wysokości pobierania próbek, ale także od momentu pobierania próbki. Stwierdzono również różnice składu chemicznego pomiędzy mgłą radiacyjna a orograficzną.
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Development of urban water and sewerage systems in Gdansk ). Historical background.
PublikacjaGospodarka wodno - ściekowa Gdańska. Rozwój historyczny, konsekwencje, ciągłość i kompleksowość działań. Wpływ aglomeracji na środowisko Zatoki Gdańskiej i Bałtyku.
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TiO2-Nitrogen Modified for Water Decolourisation under VIS Radiation
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Vibrational Spectroscopy in Analysis of Stimuli-Responsive Polymer–Water Systems
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Assessment of the Water Needs of Fruit Plants in the Perspective of Climate Change
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Nickel in soil and water: Sources, biogeochemistry, and remediation using biochar
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Fog water chemical composition in different geographic regions of Poland
PublikacjaPróbki wody z mgły były pobierane za pomocą pasywnych i aktywnych próbników na trzech stacjach pobierania próbek. Miejsca pobierania próbek usutuowane były w różnych regionach geograficznych Polski. Analizowano następujące parametry: przewodność, pH, wybrane kationy i aniony. Uzyskane wyniki mogą stanowić wartościową informacje na temat chemizmu atmosfery.Statystyczna analiza wyników wskazuje na znaczne różnice w wartościach otrzymanych...
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Experimental study of the variations of the freezing points of ionic liquids in water
PublikacjaTemperatura zamarzania czystych soli alkiloimidazoliowych zawiera się w przedziale od - 70ºC do - 90ºC zależnie od długości podstawinika alkilowego oraz od rodzaju anionu. Celem niniejszej pracy jest znalezienie odpowiedniej metody pomiaru zmian temperatury zamarzania chlorku 1-metylo-3-oktyloimidazolu w wodzie. Wynik przeprowadzonych badań pozwolił na sporządzenie fragmentu diagramu fazowego dla wodnego roztworu chlorku...
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<title>Fiber optic probe for monitoring of drinking water</title>
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