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Search results for: MUSICAL SOUND SEPARATION
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MAGNETOACOUSTIC HEATING AND STREAMING IN A PLASMA WITH FINITE ELECTRICAL CONDUCTIVITY
PublicationNonlinear effects of planar and quasi-planar magnetosound perturbations are discussed. Plasma is assumed to be an ideal gas with a finite electrical conductivity permeated by a magnetic filed orthogonal to the trajectories of gas particles. the excitation of non-wave modes in the filed of intense magnetoacoustic perturbations, i.e., magnetoaciustic heating and streaming, is discussed. The analysis includes a derivation if instantaneous...
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Pharmaceutical and forensic drug applications of chiral supercritical fluid chromatography
PublicationTHE SUPERCRITICAL FLUID IS AN EXCELLENT CHOICE AS THE CHROMATOGRAPHIC MOBILE PHASE BECAUSE IT ALLOWS RAPID SEPARATION WITH HIGH EFFICIENCY AND APPLICATIONS INVOLVING ENANTIORESOLUTION ARE COMMON. SUPERCRITICAL FLUID CHROMATOGRAPHY (SFC) IS INCREASINGLY USED FOR ANALYTICAL, SEMI-PREPARATIVE AND PREPARATIVE PURIFICATION OF CHIRAL COMPOUNDS, INCLUDING PRODUCTION OF ENANTIOMERS THAT ARE MAINLY ENCOUNTERED DURING DRUG DEVELOPMENT. SFC...
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Analytical procedures for quality control of pharmaceuticals in terms of residual solvents content: Challenges and recent developments
PublicationResidual solvents play an important role in the synthesis of drugs and in product formulations. In addition, they pose a serious problem, that is toxicity, as many of them exhibit toxic or environmentally hazardous properties. Therefore, constant monitoring of quality control is needed. In this study, we present an overview of regulatory and general methods described by various pharmacopoeias. Then, the most commonly used methodologies...
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Real-time speech-rate modification experiments
PublicationAn algorithm designed for real-time speech time scale modification (stretching) is proposed, providing a combination of typical synchronous overlap and add based time scale modification algorithm and signal redundancy detection algorithms that allow to remove parts of the speech signal and replace them with the stretched speech signal fragments. Effectiveness of signal processing algorithms are examined experimentally together...
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Non-enzymatic glutathione-mediated conjugation of unsymmetrical bisacridine C-2028 with anticancer activity
Open Research DataThe presented data complement the studies on the interplay between C-2028 (anticancer-active unsymmetrical bisacridine) and the glutathione S-transferase/glutathione (GST/GSH) system.
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How to model temporal changes in nontargeted metabolomics study? A Bayesian multilevel perspective
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Evaluation of sample injection precision in respect to sensitivity in capillary electrophoresis using various injection modes
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Disposable pipette tips extraction: Fundamentals, applications and state of the art
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Application of ionic liquid-based microwave-assisted extraction of malachite green and crystal violet from water samples
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Enantioselective comprehensive two-dimensional gas chromatography of lavender essential oil
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Headspace liquid phase microextraction for quantitation of hexanal in potato crisps by gas chromatography
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Enantioselective comprehensive two-dimensional gas chromatography. A route to elucidate the authenticity and origin ofRosa damascena Milleressential oils
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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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Selective transport of zinc ions through novel polymer inclusion membranes (PIMS) containing β-diketone derivatives as carrier reagents
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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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Preparation and HPLC evaluation of a new 1,3-alternate 25,27-bis-[p-chlorobenzyloksy]26,28-bis-[3-propyloxy]-calix[4]arene silica bonded stationary phase
PublicationPrzeprowadzono syntezę nowej fazy stacjonarnej HPLC na bazie pochodnej 25,27-bis-[p-chlorobenzyloksy]26,28-bis-[3-propyloksy]-kaliks[4]arenu zablokowanego w konformacji 1,3-naprzemianległej. Zbadano selektywność i sprawność fazy w stosunku do aromatycznych izomerów pozycyjnych, alkilobenzenów, WWA, sulfonamidów i niesterydowych leków przeciwbólowych.
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Static and dynamic superheated water extraction of essential oil components fromThymus vulgarisL.
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Solvent extraction of copper ions by 3-substituted derivatives of β-diketones
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Thermodynamic study of new antiepileptic compounds by combining chromatography on the phosphatidylcholine biomimetic stationary phase and differential scanning calorimetry
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Comparison of mouse plasma and brain tissue homogenate sample pretreatment methods prior to high-performance liquid chromatography for a new 1,2,4-triazole derivative with anticonvulsant activity
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High-performance liquid chromatography thermodynamic study of new potential antiepileptic compounds on a cholesterol column using isocratic elution with methanol/water and acetonitrile/water eluent systems
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Solid-phase extraction using octadecyl-bonded silica modified with photosynthetic pigments from Spinacia oleracea L. for the preconcentration of lead(II) ions from aqueous samples
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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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The influence of magnetic water treatment on CaCO3 scale formation in membrane distillation process
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Membrane distillation with laminar flow
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The influence of storage time on the performance of polypropylene membranes applied for membrane distillation
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Water Purification by Membrane Distillation Process
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Removal of metal particles from carbon nanotubes using conventional and microwave methods
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Recovery of hydrochloric acid from metal pickling solutions by membrane distillation
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The fermentation process integrated with membrane distillation
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The influence of salt in solutions on hydrochloric acid recovery by membrane distillation
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CONCENTRATION OF NaCl SOLUTION BY MEMBRANE DISTILLATION INTEGRATED WITH CRYSTALLIZATION
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Applicability of glass fiber as a support material for generation of gase ous standard mixtures using thermal decomposition of the surface compound. Calibration of analytical equipment.
PublicationW pracy przedstawiono technikę sporządzania gazowych mieszanin wzorcowych(składnikiem mierzonym był eten) w oparciu o termiczny rozkład związków powierzchniowych. Jako nośnik dla związku powierzchniowego zastosowano włókno szklane. W temperaturze 245 stopni Celsjusza związek powierzchniowy ulega rozkładowi bądź przegrupowaniu uwalniając znaną ilość analitu (etenu). Technika ta umożliwia sporządzanie gazowych mieszanin...
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HPLC-DAD in identification and quantification of selected coumarins in crude extracts from plant cultures of Ammi majus and Ruta graveolens.
PublicationW pracy opisano wyniki badań nad opracowaniem metody rozdzielania, identyfikacji i oznaczania wybranych kumaryn i funarokumaryn w surowych ekstraktach roślinnych z Ammi majus i Ruta graveolens hodowanych pojedynczo lub w kokulturach. Zbadano przydatność trzech głównych składników eluentu, stosowanych w układach faz odwróconych i różnych programów elucji: woda- acetonitryl(ACN)- metanol (MeOH)- tetrahydrofuran (THF). W optymalnej...
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Salinity and pH as factors affecting the passive sampling and extraction of pharmaceuticals from water
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Complexing and Chelating Agents Immobilized on Silica Gel and Related Materials and Their Application for Sorption of Inorganic Species
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In-tube extraction for the determination of the main volatile compounds in Physalis peruviana L
PublicationAn analytical procedure based on in-tube extraction followed by gas chromatography with mass spectrometry has been developed for the analysis of 24 main volatile components in cape gooseberry (Physalis peruviana L.) samples. According to their chemical structure, the compounds were organized into different groups: one hydrocarbon, one aldehyde, four alcohols, four esters, and 14 monoterpenes. By single-factor experiments, incubation...
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The role of noble metals in TiO2 nanotubes for the abatement of parabens by photocatalysis, catalytic and photocatalytic ozonation
PublicationThe role of modified TiO2 nanotubes (TNTs) with noble metals was studied for photocatalysis, catalytic and photocatalytic ozonation of a paraben’s mixture. The TNTs were obtained by anodization and were modified by photodeposition with 0.25 mol% of Au, Pt or Pd. Results showed that solar photocatalysis led to higher degradation than UVA radiation, and under UVA radiation, the use of 3 Pt-TNTs (3 TNTs plates modified with Pt) and...
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A review on carbon storage via mineral carbonation: Bibliometric analysis, research advances, challenge, and perspectives
PublicationMineral carbonation as a way of carbon storage has received a particular attention in the reduction of carbon dioxide (CO2) emission . This work gives a comprehensive description of the research trends and hotspots in the field of mineral carbonation for carbon storage based on bibliometric analysis. A total of 1507 articles were collected from the Web of Science database from 2010 to 2022 and analyzed in details, using a Citepace...
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Polymer and graphitic carbon nitride based nanohybrids for the photocatalytic degradation of pharmaceuticals in wastewater treatment – A review
PublicationPharmaceuticals, including antibiotics and anti-inflammatory drugs, have been frequently detected in water reservoirs, in concentrations ranging from ng/L to μg/L, owing to their wide use in treatment of human and animal disease. Their uncontrolled use results in their increased release into the environment which is harmful for humans, animals, aquatic life and aquatic system. To remove these pollutants from water bodies, various...
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Determination of environmental pollutants in soil and sediments - some aspects of sample clean-up and GC analysis
PublicationPrzedstawiono wstępne wyniki badań nowej procedury analitycznej przeznaczonej do badań próbek i osadów dennych na zawartość związków organicznych (WWAPCB). Procedura składa się z następujących etapów: - ekstrakcji analitów z wykorzystaniem techniki ASE, - oczyszczania ekstraktów (kolumienki), - chromatograficznego rozdzielania i oznaczania analitów.
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The lipophilicity indices of flavonoids estimated by reversed-phase liquid chromatography using different computation methods
PublicationDo oceny właściwości chromatograficznych wybranych flawonoidów zastosowano wyskokosprawną chromatografię cieczową z odwróconym układem faz i kolumnami chromatograficznymi typu C-8 i C-18.Lipofilowość wyrażono za pomocą różnych deskryptów lipofilowości.
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Photodegradation of phenol by UV/TiO2 and Vis/N,C-TiO2 processes: Comparative mechanistic and kinetic studies
PublicationPorównano drogę fotodegradacji w dwóch systemach badawczych: UV/TiO2 i Vis/N,C-TiO2. Zbadano efektywność degradacji fenolu, powstające produkty pośrednie oraz generowanie rodników hydoksylowych w przygotowanych układach badawczych. Wyniki badań wykazały porównywalne efektywności degradacji fenolu w zawiesinach: domieszkowany TiO2/Vis i TiO2 P-25/UV. Uzyskane wyniki wskazują również na odmienne drogi degradacji zanieczyszczeń w...
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Free volume in physical absorption of carbon dioxide in ionic liquids: Molecular dynamics supported modeling
PublicationUnderstanding the mechanisms underlying the carbon dioxide (CO2) absorption in ionic liquids (ILs) is the key to their efficient utilization in industrial flue gas treatment. One of the parameters considered substantially important in the process is the Free Volume. In this study, the Fractional Free Volume (FFV) of 73 ILs was calculated using Molecular Dynamics (MD). A quantitative Structure-Property Relationship (QSPR) study...
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Mechanochemically synthesized Mn3O4@β-cyclodextrin mediates efficient electron transfer process for peroxymonosulfate activation
PublicationThe rational surface engineering of heterogeneous catalysts is of great significance in advanced oxidation processes (AOPs) for eliminating refractory contaminants but remains challenging. In this study, β-cyclodextrin modified Mn3O4 (Mn3O4@β-CD) was prepared through a mechanochemical approach for peroxymonosulfate (PMS) activation, which achieved efficient bisphenol A (BPA) removal via electron transfer process (ETP). The reactive...
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Superhydrophobic and superoleophilic melamine sponges impregnated with deep eutectic solvents for oil spill cleanup
PublicationThe extensive extraction of oil from the bottom of seas and oceans and its transportation by tankers increase the risk of potential environmental disasters associated with hydrocarbon fractions entering water reservoirs. Therefore, this paper presents the preparation of a simple impregnation of a melamine sponge with deep eutectic solvents (DES), which can be obtained from natural sources, including coconut oil, palm kernel oil,...
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Modeling of chromatographic lipophilicity of food synthetic dyes estimated on different columns
PublicationBadano parametry retencyjne wybranych syntetycznych barwników żywności z wykorzystaniem techniki RP-HPLC z wykorzystaniem kolumn z chemicznie modyfikowanym wypełnieniem typu C-8, C-16, C-18 oraz CN.Uzyskane wyniki mogą być podstawą do stwierdzenia, że badane związki charakteryzują się podobnymi parametrami retencyjnymi w stosunku do kolumn z fazą stacjonarną typu C-8, C-16 oraz C-18.
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Silver-doped TiO2 prepared by microemulsion method: surface properties, bio- and photoactivity
PublicationOtrzymane fotokatalizatory typu Ag-TiO2 wykazywały wyższą aktywność w reakcjach fotodegradacji fenolu w obecności promieniowania z zakresu UV oraz światła widzialnego w porównaniu z komercyjnym katalizatorem Degussa P25 oraz czystym niedomieszkowanym TiO2, otrzymanym w mikroemulsji woda-AOT-cykloheksan. Powierzchnia właściwa (BET) otrzymanych katalizatorów wynosiła od 100 do 160 m2/g. Na podstawie analizy rentgenowskiej (XRD) stwierdzono,...
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Effect of process parameters on fouling and stability of MF/UF TiO2 membranes in a photocatalytic membrane reactor
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Micellar liquid chromatography for lipophilicity determination of new biologically active 1,3‐purinodiones
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