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Search results for: MEMBRANE DISTILLATION
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Geometrycznie nieliniowa analiza membran stosowanych do konstrukcji przekryć membranowych z uwzględnieniem różnych typów związków konstytutywnych.
PublicationPraca dotyczy geometrycznie i fizycznie nieliniowej analizy membran stosowanych do konstrukcji przekryć wiszących wykonanych z tkanin technicznych opisanych różnymi związkami konstytutywnymi.
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Ultrasound assisted solvent extraction of porous membrane-packed samples followed by liquid chromatography-tandem mass spectrometry for determination of BADGE, BFDGE and their derivatives in packed vegetables
PublicationThe problem of the presence of trace organic pollutants in food is of growing importance due to increasing awareness about their impact on newborns, infants and adults of reproductive age. Despite the fact that packaged food products offer many advantages, packaging can be a source of contamination for stored food. Thus, monitoring such pollution in food is of high importance. In this work, a novel methodology based on the solvent...
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Recent advances in the recovery of precious metals (Au, Ag, Pd) from acidic and WEEE solutions by solvent extraction and polymer inclusion membrane processes – a mini-review
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Lower Rim Substituted tert-Butyl Calix[4]arenes (Part IV). Calix[4]arene-Crown Ethers as Ionophores in Plasticized PVC-membrane electrodes.
PublicationPrzedstawiono syntezę i charakterystykę trzech p-tert-butylokaliks[4]aren-koron-4, -5, -6 (związki 2 - 4 o różnej długości łańcucha polyoksaetylenowego łączącego distalne grupy OH). Syntezowane związki wykazują wysoką selektywność na kationy sodu, potasu lub cezu. Badano zależność pomiędzy stereochemiczną strukturą tych ligandów, a wyznaczonymi potencjometrycznie współczynnikami selektywności oraz wyznaczonymi stałymi trwałości...
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Nanofiltration in the food industry
PublicationNanofiltration (NF), as a pressure-driven membrane process, has been widely demonstrated to have great potential for food processing applications. There are several advantages of this membrane process over traditional methods that makes NF suitable for food processing, such as the low thermal damage to the product, higher aroma retention, lower energy consumption, and low maintenance costs. In this chapter, according to the recent...
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Potentiometric sensor containing set of ion selective electrodes with lipid modified membranes for quality assessment of tested non-alcoholic beverages
PublicationPotentiometric sensors may be a good tool for fast quality control of commercial drinks. In this work, such a sensor, containing a set of ion-selective electrodes with lipid-modified membranes (benzylhexadecyldimethylammonium chloride monohydrate, hexadecylamine, 1-dodecanol, elaidic acid, cholesterol) was used for discrimination and quality control of non-alcoholic beverages, mainly composed of sugar and citric acid. It was found...
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Effective calcium doping at the B-site of BaFeO3−δ perovskite: towards low-cost and high-performance oxygen permeation membranes
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Selective transport of zinc ions through novel polymer inclusion membranes (PIMS) containing β-diketone derivatives as carrier reagents
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Nanostructured polyethersulfone nanocomposite membranes for dual protein and dye separation: Lower antifouling with lanthanum (III) vanadate nanosheets as a novel nanofiller
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Polar localization of new flavonoids from aerial parts of Scleranthus perennis and Hottonia palustris and their modulatory action on lipid membranes properties
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INVESTIGATION OF ACIDIC SOLUTIONS BY POTENTIOMETRIC TASTE SENSOR WITH ALL SOLID STATE ELECTRODES
PublicationPotentiometric taste sensors with electrodes containing lipophilic compound / polymer membranes were already used to distinguish commercial liquid products. In this paper a new potentiometric taste sensor consisting of six All Solid State Electrodes (ASSEs) has been presented. Each of the membrane contains a selected lipophilic compound. The set-up consists of a reference electrode and six ASSEs. The inner layer made of a conducting...
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Lower Rim Substituted p-tert-Butyl-Calix[4]arene. Part 16. Synthesis of 25, 26, 27, 28-tetrakis(piperidinethiocarbonylmethylene)-p-tert-butylcalix[4]arene and its interaction with metal ions
PublicationThe synthesis, characterisation and X-ray crystal structures of p-tert-butyl-calix[4]arenethioamide L and its complex with lead L-Pb2+ is reported. The cation-binding properties in solution have been assessed by liquid-liquid extraction of the metal picrates from water into dichloromethane and by stability constants determination in acetonitrile using UV-absorption spectrophotometry or potentiometry. The compound was used as active...
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Melatonin maintains mitochondrial membrane potential and attenuates activation of initiator (casp-9) and effector caspases (casp-3/casp-7) and PARP in UVR-exposed HaCaT keratinocytes
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Immunocytochemical and biochemical detection of EMMPRIN in the rat tooth germ: differentiation-dependent co-expression with MMPs and co-localization with caveolin-1 in membrane rafts of dental epithelial cells
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Investigation of mechanism of desmopressin binding in vasopressin V2 receptor versus vasopressin V1a and oxytocin receptors: Molecular dynamics simulation of the agonist-bound state in the membrane–aqueous system
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Facilitated transport of Zn(II), Cd(II) and Pb(II) ions trough polymer inclusion membranes with calix[4]-crown-6 derivaties
PublicationBadano transport mieszaniny równomolowych ilości jonów Zn(II), Cd(II) i Pb(II)z wodnej fazy azotanowej (cMe=0,001M) przez polimerowe membrany inkluzyjne(PIM) zawierające pochodne kaliks[4]korony-6 jako nośniki jonów. Badany był wpływ różnych podstawników na wydajność procesu. Selektywność transportu przez membrany zawierające jonofory 4 i 5 malała w kolejności Pb(II), Zn(II), Cd(II), natomiast z jonoforem 3 Pb(II), Zn(II)Cd(II)....
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Lower rim substituted tert-Butylcalix[4]arenes. Part 13. Interaction of calix-hydroxamates with Fe(III) and Pb(II); studies in ion-selective membrane electrodes (ISE)
PublicationPrzedmiotem pracy są badania oddziaływań pomiędzy trzema wybranymi hydroksamowymi pochodnymi t-butylo-kaliks[4]arenu i jonami metali z wykorzystaniem membranowych elektrod jonoselektywnych (ISE). Elektrody zawierające jako materiał aktywny wymienione związki jonoforowe charakteryzują się nernstowskim nachyleniem i szerokim zakresem liniowości na jony Pb(II), a także dobrą selektywnością na jony Pb(II)w stosunku do jonów UO2(II),...
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Chromogenic derivatives of new bis(phenylhydrazono-1H-tetrazol-5-yl-acetonitriles) - synthesis and properties
PublicationDerivatives of bis(phenylhydrazono-1H-tetrazol-5-yl-acetonitriles) with oxygen and sulphur atoms in the structure of aliphatic chains were successfully synthesised. The correlation between the ligand structure and its complexation properties was investigated by absorption spectroscopy. The formation of complexes of presented compounds with metal cations (Cu2+, Ni2+, Zn2+, Co2+, Fe2+ and Pb2+) was studied. Ligands 5-8 were additionally...
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Wetting of supports by ionic liquids used in gas separation processes
PublicationCiecze jonowe są stosowane w procesach separacji gazów jako selektywne rozpuszczalniki. Są szeroko stosowane w technologii immobilizowanych membran ciekłych, głównie w procesach oczyszczania strumieni gazowych. Praca ta charakteryzuje komercyjnie dostępne membrany porowate używane we wspomnianych procesach. Określenie właściwości nośników i fazy membranowej ma na celu wyznaczenie czynników mających wpływ na stabilności takich układów...
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Lower rim substituted tert-butyl calix[4]arene (part VII): ionophoric properties of calix[4]arene-crown-6 derivatives in plasticized PVC-membrane electrodes and in solution.
PublicationW pracy przedstawiono syntezę i charakterystykę otrzymanych produktów (2-9), pochodnych p-tert-butylokaliks[4]-korony-6. Zdolności kompleksujące tych związków badano w elektrodach jonoselektywnych, stosując te związki jako jonofory w plastyfikowanej membranie PCW.Wyznaczono wartości stałych trwałości kompleksów z jonami metali I grupy. Stwierdzono, że selektywność kompleksowania zależy od rozmiaru i natury podstawnika wprowadzonego...
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Experimental Extraction of Secure Correlations from a Noisy Private State
PublicationWe report experimental generation of a noisy entangled four-photon state that exhibits a separation between the secure key contents and distillable entanglement, a hallmark feature of the recently established quantum theory of private states. The privacy analysis, based on the full tomographic reconstruction of the prepared state, is utilized in a proof-of-principle key generation. The inferiority of distillation-based strategies...
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The possibility of application of the potentiometric sensor with all-solid-state electrodes containing lipid-polymer membranes for classification of tested black leaf teas in terms of their quality
PublicationPotentiometric sensor with all-solid-state electrodes containing lipid-polymer membranes for a set of black leaf teas coming from four countries (China, India, Sri Lanka and Kenia) classification was applied. The tested tea samples were reassigned to quality classes marked with numbers I–V according to the information available. The sensor results of tea samples are presented in the form of radar charts. It was observed that, in...
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Mechanical characterization of a gravel column in a calibration chamber operating as a triaxial cell
PublicationA series of tests considering the behavior of gravel columns was performed. A segment of column with a height of 1 m and a diameter of 0.53 m was modelled in a calibration chamber used as a triaxial cell at three different lateral stress applied. The vertical load transferred on the column head was simulated with steady increase of water pressures in the upper and lower membranes. During the loading the volumetric changes in the...
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The Application of 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine in Solvent Extraction and Polymer Membrane Separation for the Recovery of Au(III), Ag(I), Pd(II) and Pt(II) Ions from Aqueous Solutions
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Wielofazowe oscylatory z kationowym surfaktantem
PublicationPrzedstawiono mechanizmy oscylacji różnicy potencjału elektrycznego między fazami wodnymi i trójfazowego oscylatora z nitrobenzenową membraną ciekłą oraz czerofazowego oscylatora z nitrometanową membraną ciekłą. Oba oscylatory w warunkach początkowych zawierały kationowy surfaktant w fazie wodnej donorowej. Omówino procesy zachodzące w kolejnych etapach mechanizmu. Wykazano, że oscylacje są spowodowane procesami adsorpcji i desorpcji...
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Membranowe elektrody jonoselektywne typu solid-contact-ich charakterystyka, materiały do ich konstrukcji i zastosowanie analityczne
PublicationCzujniki chemiczne są urządzeniami analitycznymi dostarczającymi informacji o składzie chemicznym próbki w czasie rzeczywistym. Składają się z dwóch podstawowych elementów: z części receptorowej i przetwornikowej. W idealnej sytuacji czujnik chemiczny można użyć w pomiarach bezpośrednich bez konieczności przygotowania próbki, a sam czujnik nie wpływa w żaden sposób na próbkę.
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On the Possibility of the Amphotericin B-Sterol Complex Formation in Cholesterol- and Ergosterol-Containing Lipid Bilayers: A Molecular Dynamics Study
PublicationAmphotericin B (AmB) is a well-known membrane-active antibiotic that has been used to treat systemicfungal infections for more than 45 years. Therapeutic application of AmB is based on the fact that it is moreactive against ergosterol-containing membranes of fungal cells than against mammalian membranes withcholesterol. In this paper, we examine the hypothesis according to which the selectivity of the AmB's membraneaction originates...
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Surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS) in label-free characterization of erythrocyte membranes and extracellular vesicles at the nano-scale and molecular level
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Distillation cleanup preceded gc determination of short-chain monocarboxylic acids in aqueous and solid samples of wastewater origin = Oznaczanie krótkołańcuchowych kwasów monokarboksylowych w próbkach wodnych i stałych pochodzących z oczyszczalni ścieków z wykorzystaniem chromatografii gazowej poprzedzonej destylacją
PublicationShort-chain monocarboxylic acids (SCMAs) (C2-C5) formed in the process of aerobic biodegradation of larger organic molecules should often be monitored to optimize wastewater biological treatment and study the processes of converting organic waste matter into methane, etc. Gas chromatography (GC) seems a method of choice for such a task. Majority of samples require clean up before they can be injected into GC system. In this work...
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Zjawiska oscylacyjne w układach membranowych
PublicationOmówiono wybrane zjawiska oscylacyjne występujące w układach homogenicznych i heterogenicznych, ze szczególnym uwzględnieniem oscylatorów membranowych. Wśród nich szerzej omówiono oscylator Teorella składający się z membrany porowatej oraz oscylator z membraną ciekłą i kationowym surfaktantem, które mogą stanowić sztuczne modele złożonych procesów biologicznych. Przedstawiono założenia mechanizmu oscylacji opartego na kinetyce...
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Synthetic strategies in construction of organic low molecular-weight carrier-drug conjugates
PublicationInefficient transportation of polar metabolic inhibitors through cell membranes of eukaryotic and prokaryotic cells precludes their direct use as drug candidates in chemotherapy. One of the possible solutions to this problem is application of the ‘Trojan horse’ strategy, i.e. conjugation of an active substance with a molecular carrier of organic or inorganic nature, facilitating membrane penetration. In this work, the synthetic...
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Badania bioaktywności z wykorzystaniem komórek kościotwórczych na tytanie pokrytym chitozanem = Bioactivity studies using osteogenic cells on titanium coated with chitosan
PublicationChitosan is a natural polymer from the group of polysaccharides, which has found wide application in biomedical applications to induce bioactivity of implant. The studies described were carried out test imposition of chitosan membranes with varying degrees of deacetylation on the surface of titanium, and then check the bioactivity of the material in vitro, using osteogenic cells MC3T3-E1. Titanium surface before imposition of...
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Size-exclusion chromatography for the determination of the boiling point distribution of high-boiling petroleum fractions
PublicationThe paper describes a new procedure for the determination of boiling point distribution of high-boiling petroleum fractions using size exclusion chromatography with refractive index detector. Thus far, the determination of boiling range distribution by chromatography has been accomplished using simulated distillation with gas chromatography with the flame ionization detection. This study revealed that in spite of substantial differences...
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Korozja w środowisku ropy naftowej. Czynniki i monitorowanie
PublicationPrzedstawiono analizy właściwości ropy naftowej z punktu widzenia zawartych w niej czynników korozyjnych oraz ich wpływu na korozję stali w trakcie procesu destylacji ropy naftowej. Krytycznej analizie poddane zostały możliwości oferowane przez współczesne techniki pomiarowe. Wskazano na istotność prowadzenia kompleksowego programu oceny ropy, monitorowania korozji oraz stosowania ochrony inhibitorowej w celu ochrony instalacji...
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Quest for the Molecular Basis of Improved Selective Toxicity of All-Trans Isomers of Aromatic Heptaene Macrolide Antifungal Antibiotics
PublicationThree aromatic heptaene macrolide antifungal antibiotics, Candicidin D, Partricin A (Gedamycin) and Partricin B (Vacidin) were subjected to controlled cis-trans to all trans photochemical isomerization. The obtained all-trans isomers demonstrated substantially improved in vitro selective toxicity in the Candida albicans cells: human erythrocytes model. This effect was mainly due to the diminished hemotoxicity. The molecular modeling...
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Use of pyridinium and pyrrolidinium ionic liquids for removal of toluene from gas streams
PublicationSeparation of toluene from a toluene/N2 gas mixture using supported liquid membranes based on a series of pyridinium (1-butylpyridinium- bis(trifluoromethylsulfonyl)imide - [C4Py][Tf2N], 1-hexylpyridinium trifluoromethanesulfone [C6Py][Tf2N]) and pyrrolidinium (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide - [C4Pyrr][Tf2N], 1-hexyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide - [C6Pyrr][Tf2N], 1-butyl-1-methylpyrrolidinium...
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Synthetic strategies in construction of organic macromolecular carrier–drug conjugates
PublicationMany metabolic inhibitors, considered potential antimicrobial or anticancer drug candidates, exhibit verylimited ability to cross the biological membranes of target cells. The restricted cellular penetration ofthose molecules is often due to their highhydrophilicity. One of the possible solutions to this problem is aconjugation of an inhibitor with a molecular organic nanocarrier. The conjugate thus formed should beable to penetrate...
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The Effect of Sterols on Amphotericin B Self-Aggregation in a Lipid Bilayer as Revealed by Free Energy Simulations
PublicationAmphotericin B (AmB) is an effective but toxic antifungal drug, known to increase the permeability of the cell membrane, presumably by assembling into transmembrane pores in a sterol-dependent manner. The aggregation of AmB molecules in a phospholipid bilayer is, thus, crucial for the drug’s activity. To provide an insight into the molecular nature of this process, here, we report an atomistic molecular dynamics simulation study...
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2,6-Bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe2) Derivatives for the Removal of Cu(II), Ni(II), Co(II), and Zn(II) Ions from Aqueous Solutions in Classic Solvent Extraction and a Membrane Extraction
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Lower Rim Substituted p-tert-Butyl Calix[4]arenes(V). Synthesis of New 5,11,17,22-tetrakis-p-tert-Butyl-25-27-bis(dialkoxyphosphorylmethoxy)calix[4] arenes and Cation Complexation Studies in Ion Selective Membrane Electrodes.
PublicationZaprezentowano syntezę i właściwości trzech nowych związków (2-4), bis podstawionych na dolnym obrzeżu grupami z resztą fosforylową. Związki te były badane jako jonofory w membranowych elektrodach jonoselektywnych (ISE) wykazując selektywność na kationy Rb+,K+ oraz duży i płaski kation guanidyniowyG+). Badano korelację pomiędzy stereo-strukturą związków a ich selektywnością w ISE. Stałe trwałości kompleksów z kationami metali...
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Qualitative analysis of phospholipids and their oxidised derivatives – used techniques and examples of their applications related to lipidomic research and food analysis
PublicationPhospholipids (PLs) are important biomolecules that not only constitute structural building blocks and scaffolds of cell and organelle membranes, but also play a vital role in cell biochemistry and physiology. Moreover, dietary exogenous PLs are characterized by high nutritional value and other beneficial health effects, which are confirmed by numerous epidemiological studies. For this reason, PLs are of high interest in lipidomics...
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Biological processes modelling for MBR systems: A review of the state-of-the-art focusing on SMP and EPS
PublicationA mathematical correlation between biomass kinetic and membrane fouling can improve the understanding and spread of Membrane Bioreactor (MBR) technology, especially in solving the membrane fouling issues. On this behalf, this paper, produced by the International Water Association (IWA) Task Group on Membrane modelling and control, reviews the current state-of-the-art regarding the modelling of kinetic processes of biomass, focusing on...
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Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)
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Ultrafiltration Process in Disinfection and Advanced Treatment of Tertiary Treated Wastewater
PublicationThe paper presents the results of research on the use of ultrafiltration, using membranes of 200 and 400 kDa separation, for disinfection of municipal treated wastewater. The research was conducted on a fractional technical scale using real municipal treated wastewater from two large wastewater treatment plants treating most of the wastewater over the one-million polycentric Gdańsk agglomeration (1.2 million inhabitants). UF 200...
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The Influence of the Mixed DPC:SDS Micelle on the Structure and Oligomerization Process of the Human Cystatin C
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N,N’-Bis(salicylidene)ethylenediamine (Salen) as an Active Compound for the Recovery of Ni(II), Cu(II), and Zn(II) Ions from Aqueous Solutions
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In Vitro Evaluation of Polihexanide, Octenidine and NaClO/HClO-Based Antiseptics against Biofilm Formed by Wound Pathogens
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Magnesium-Doped Sr2(Fe,Mo)O6−δ Double Perovskites with Excellent Redox Stability as Stable Electrode Materials for Symmetrical Solid Oxide Fuel Cells
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Cross-Flow Microfiltration of Glycerol Fermentation Broths with Citrobacter freundii
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O mozliwości zastosowania w membranowym sensorze smaku elektrod z elektroaktywnym polimerem
PublicationSkonstruowano i testowano nowe elektrody membranowe z polimerem elektroaktwnym w celu wykorzystania w sensorze smaku. Elektrody z węglem szklistym składały się z dwóch warst: 1) poli(3,4-etylenodioksytiofen) z przecijonem (poli (2-strenosulfonian)) lub z anionem ClO4; 2) polichlorek winylu z odpowiednim związkiemlipofilowym. Stwierdzono, że rodzaj przecijonu w polimerze elektroaktywnym nie wpływa na czułość elektrody na jony obecne...