Wyniki wyszukiwania dla: supported liquid membrane

Concentration of FeSO4 spent solutions by membrane distillation

Publikacja

M. M. Gryta

- Polish Journal of Chemical Technology - Rok 2007

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Spectrophotometric Investigations of membrane oscillator with hexadecyltrimethylammonium bromide

Publikacja

- Rok 2003

Zbadano widma absorbcyjne w zakresie UV-VIS roztworów wodnych oscylatora z membraną ciekłą zawierającego bromek heksadecylotrimetyloamoniowy. Stwierdzono, że od początku procesu z membrany ciekłej przechodzą do faz wodnych cząsteczki kwasu pikrynowego i nitrobenzenu.

Are the short cationic lipopeptides bacterial membrane disruptors? Structure-Activity Relationship and molecular dynamic evaluation

Publikacja

K. Greber
J. Zielińska
Ł. Nierzwicki
K. Ciura
P. Kawczak
J. Nowakowska
T. Bączek
W. Sawicki

- BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES - Rok 2019

Short cationic lipopeptides are amphiphilic molecules that exhibit antimicrobial activity mainly against Grampositives. These compounds bind to bacterial membranes and disrupt their integrity. Here we examine the structure-activity relation (SAR) of lysine-based lipopeptides, with a prospect to rationally design more active compounds. The presented study aims to explain how antimicrobial activity of lipopeptides is affected by...

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Corncob-supported calcium oxide nanoparticles from hen eggshells for cadmium (Cd-II) removal from aqueous solutions; Synthesis and characterization

Publikacja

W. S. Muleta
S. M. Denboba
A. B. Bayu

- Heliyon - Rok 2024

This study investigated the efficient removal of cadmium ions from aqueous solutions using calcium oxide nanoparticles (CaO NPs) synthesized from waste hen eggshells using a Sol-gel method and supported on corncob bio-adsorbent. The synthesized CaO NPs were characterized using FT-IR, XRD, specific surface area, and TGA. Batch adsorption experiments were conducted to examine the influence of process parameters such as adsorbent...

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The presence of polycyclic aromatic hydrocarbons in disposable baby diapers: A facile determination method via salting-out assisted liquid-liquid extraction coupled with gas chromatography-mass spectrometry

Publikacja

P. Georgiev
M. Belka
T. Baczek
J. Płotka-Wasylka

- JOURNAL OF CHROMATOGRAPHY A - Rok 2023

In this paper we demonstrate the development of the extraction procedure of polycyclic aromatic hy- drocarbons from baby diapers along with their quantification by gas chromatography-mass spectrometry. Apart from covering plastic foil, disposable baby diapers contain sorbents intended to absorb urine and feces. A hygroscopic, adsorptive, and tough-to-homogenize fibrous sorbent, represents an analytical chal- lenge to analytical...

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Studies on the solid-liquid equilibria and intermolecular interactions Urea binary mixtures with Sulfanilamide and Sulfacetamide

Publikacja

M. Przybyłek
P. Walczak
D. Ziółkowska
I. Grela
P. Cysewski

- JOURNAL OF CHEMICAL THERMODYNAMICS - Rok 2021

The binary phase diagrams of Sulfanilamide-Urea (SN-U) and Sulfacetamide-Urea (SC-U) were measured using differential scanning calorimetry technique (DSC). Both examined mixtures were found to form simple binary eutectics. The limited miscibility in the solid state observed by DSC, proving inability of co-crystallization in new multi-molecular form, was also confirmed using PXRD and FTIR-ATR measurements of solid dispersions...

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Membrane-SPME the best 'green' sample preparation technique for the gas chromatographic determination polar organic pollutants in polar media

Publikacja

A. Spietelun
Ł. Marcinkowski

- Rok 2011

One of the most popular technique for sample preparation, which fulfill requirements of green analytical chemistry, is solid phase microextraction (SPME). Because of the undoubted advantages of SPME technique, solvent-free character of the extraction process and the enormous potential in analytical practice, a series of studies has been undertaken to develop new technical solutions, where improving the sensitivity and the extraction...

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

Publikacja

- Catalysts - Rok 2019

Dry reforming of methane (DRM) is an eco-friendly method of syngas production due to the utilization of two main greenhouse gases—methane and carbon dioxide. An industrial application of methane dry reforming requires the use of a catalyst with high activity, stability over a long time, and the ability to catalyze a reaction, leading to the needed a hydrogen/carbon monoxide ratio. Thus, the aim of the study was to investigate the...

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The Use of Liquid Crystal Thermography an Image Processing in Heat and Fluid-Flow Research

Publikacja

- Rok 2015

Liquid crystal thermography (LCT) have been used in many technical, industrial and biomedical applications [1]. During over 20 years it has been successfully applied in Department of Energy and Industrial Apparatus at Gdansk University of Technology for visualization of steady-state and transient temperature fields. In order to demonstrate feasibility of LCT techniques in practical heat transfer contexts, the authors have performed...

3D modelling of liquid fuels base infrastructure for the purpose of visualization and geometrical analysis

Publikacja

A. Janowski
J. Szulwic
M. Żuk

- Rok 2015

The paper presents the methodology for obtaining a 3D model of the tank for liquid fuels on the basis of the terrestrial laser scanning and its processing for the analysis of tanks geometry. The development process indicates the possibility to obtain the reliable results useful for the evaluation of the tank side surfaces geometry (shells). The result of the development is a 3D model of the tank, taking into account the individual...

Phenomenon of hydraulic jump formed on liquid layer by single-phase impinging liquid jet

Publikacja

S. Gumkowski

- Rok 2005

Przedstawiono analizę teoretyczną zjawiska uskoku hydraulicznego tworzonego przez uderzającą strugę. rezultaty analizy teoretycznej porównano z wynikami badań eksperymentalnych.

Origin of the liquid-liquid phase transition for trans-1,2-dichloroethylene observed by IR spectroscopy

Publikacja

K. Merkel
A. Kocot
R. Wrzalik
J. Ziolo

- JOURNAL OF CHEMICAL PHYSICS - Rok 2008

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Exploring the potential of green chemistry in reversed-phase liquid chromatography: A review of sustainable solvents

Publikacja

O. Kalisz
M. Tobiszewski
A. Nowaczyk
S. Bocian

- TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Rok 2024

This article delves into the growing field of green analytical chemistry, focusing on sustainable solvents for reversed-phase liquid chromatography (RP LC). RP LC is a widely applied technique in the pharmaceutical, food, and environmental analysis industries, consuming vast quantities of toxic and non-renewable solvents that pose serious environmental and health risks. In response to the urgent need for greener alternatives, this...

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How do sterols determine the antufungal activitiy of amphotericin B? Free energy of binding between the drug and its membrane targets.

Publikacja

A. Neumann
M. Bagiński
J. Czub

- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Rok 2010

Amphotericin B (AmB) is a well-known polyene antibiotic used to treat systemic fungal infections. It is commonly accepted that the presence of sterols in the membrane is essential for the AmB biological activity, that is, for the formation of transmembrane ion channels. The selective toxicity of AmB for fungal cells is attributed to the fact that it is more potent against fungal cell membranes containing ergosterol than against...

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Spectroscopic and photophysical properties of ZNTPP in a room temperature ionic liquid

Publikacja

J. Szmytkowski
T. Bond
M. Paige
R. Scote
R. Steer

- JOURNAL OF PHYSICAL CHEMISTRY A - Rok 2010

The steady-state absorption and emission spectra and the time-resolved Soret- and Q-band excited fluorescence profiles of the model metalloporphyrin, ZnTPP, have been measured in a highly purified sample of the common room temperature ionic liquid, [bmim][PF(6)]. S(2)-S(0) emission resulting from Soret-band excitation behaves in a manner completely consistent with that of molecular solvents of the same polarizability. The ionic...

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Identification of dynamic parameters in the context of diagnostics of steel tank with different level of liquid.

Publikacja

- Diagnostyka - Rok 2015

The paper presents an experimental study to identify the dynamic parameters of a water-filled tank model. The experimental modal analysis approach involving the excitation at one point of the structure and acquisition of vibra tions at selected points distri buted over the tank surface allowed to determine the resonance frequencies, mode shapes and damping ratios. The main aim of the research was to examine the influence of...

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Noble metal–TiO2 supported catalysts for the catalytic ozonation of parabens mixtures

Publikacja

J. Gomes
K. Bednarczyk
M. Gmurek
M. Stelmachowski
A. Zaleska-Medynska
F. Bastos
M. Quinta-Ferreira
R. Costa
R. Quinta-Ferreira
R. Martins

- PROCESS SAFETY AND ENVIRONMENTAL PROTECTION - Rok 2017

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The concept of capillary forces supported evaporator for application to domestic ORC unit

Publikacja

D. Mikielewicz
J. Mikielewicz

- Rok 2012

W pracy przedstawiono koncepcję parownika wspomaganego siłami kapilarnymi do wykorzystania w mikrosiłowni domowej.

Structural Model of the Bilitranslocase Transmembrane Domain Supported by NMR and FRET Data

Publikacja

A. Choudhury
E. Sikorska
J. van
P. Bayer
Ł. Popenda
K. Szutkowski
S. Jurga
M. Bonomi
A. Sali
I. Zhukov... i 2 innych

- PLOS ONE - Rok 2015

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Measurement of the Development of a Learning IT Organization Supported by a Model of Knowledge Acquisition and Processing

Publikacja

- LECTURE NOTES IN COMPUTER SCIENCE - Rok 2011

The paper presents a model of knowledge acquisition and processing for the development of learning organizations. The theory of a learning organization provides neither metrics nor tools to measure its development The authors' studies in this field are based on their experience gathered after projects realized in real IT organizations. The authors have described the construction of the model and the methods of its verification...

Vibration surveillance supported by Hardware-In-the-Loop Simulation in milling flexible workpieces

Publikacja

- MECHATRONICS - Rok 2014

W artykule przedstawiono nowoczesne podejście do problemu minimalizacji poziomu drgań podczas frezowania szybkościowego elementów podatnych. Do analizy dynamicznej procesu skrawania zastosowano niestacjonarny model opisany we współrzędnych hybrydowych. Na tej podstawie, przy wykorzystaniu energetycznego wskaźnika jakości wyprowadzono opis sygnału sterującego. Sygnał ten jest następnie stosowany do aktywnej redukcji drgań przedmiotu...

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The concept of capillary forces supported evaporator for application to domestic ORC unit

Publikacja

- Rok 2014

In the paper presented are studies on the investigation of the capillary forces effect inducted in the porous structure of a loop heat pipe. The potential application of such heat exchanger is for example an evaporator of the domestic micro CHP unit. Preliminary analysis of the results indicates water as having the best potential, however taking into account all issues it can be said that the best effect is obtained using ethanol.

RF Indoor Positioning System Supported by Wireless Computer Vision Sensors

Publikacja

- Rok 2014

In this paper the possibility of increase the accuracy of RF fingerprinting indoor tracking system by the use of additional information from simple vision system is examined. As the distances in signal space differs from ones in real environment the ambiguity in decision process of fingerprinting algorithm can occur when set of closest distances between tag and map points in signal space corresponds to big distances differences...

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Liquid Crystals, PIV and IR-Photography in Selected Technical and Biomedical Applications

Publikacja

- Rok 2017

Thermochromic liquid crystals (TLC), Particle Image Velocimetry (PIV), Infrared Imaging Themography (IR) and True-Colour Digital Image Processing (TDIP) have been successfully used in non-intrusive technical, industrial and biomedical studies and applications. These four tools (based on the desktop computers) have come together during the past two decades to produce a powerful advanced...

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Phospholipid-functionalized gold electrode for cellular membrane interface studies - interactions between DMPC bilayer and human cystatin C

Publikacja

P. Niedziałkowski
P. Jurczak
M. Orlikowska
A. Wcisło
J. Ryl
T. Ossowski
P. Czaplewska

- BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES - Rok 2024

This work describes the electrochemical studies on the interactions between V57G mutant of human cystatin C (hCC V57G) and membrane bilayer immobilized on the surface of a gold electrode. The electrode was modified with 6-mercaptohexan-1-ol (MCH) and 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). DMPC was used as a membrane mimetic for monitoring electrochemical changes resulting from the interactions between the functionalized...

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Liquid crystals for information processing.

Publikacja

B. Kosmowski

- Rok 2004

W pracy przedstawiono właściwości ciekłych kryształów, zastosowania tych materiałów w akwizycji, przetwarzaniu i przesyłaniu informacji. Omówiono urządzenia i systemy wisualizacji informacji wykorzystujące ciekłe kryształy. Zaprezentowano zastosowania elemetów ciekłokrystalicznych w urządzeniach pamięci optycznej.

DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN SOIL SAMPLES USING ULTRASONIC PROBE AND SALT-ASSISTED LIQUID-LIQUID EXTRACTION COUPLED WITH HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY

Publikacja

R. Heydari
A. Shakarami
M. Kaykhaii

- JOURNAL OF THE CHILEAN CHEMICAL SOCIETY - Rok 2019

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Mass spectrometry based identification of geometric isomers during metabolic stability study of a new cytotoxic sulfonamide derivatives supported by quantitative structure-retention relationships

Publikacja

M. Belka
W. Hewelt-Belka
J. Sławiński
T. Bączek

- PLOS ONE - Rok 2014

A set of 15 new sulphonamide derivatives, presenting antitumor activity have been subjected to a metabolic stability study. The results showed that besides products of biotransformation, some additional peaks occurred in chromatograms. Tandem mass spectrometry revealed the same mass and fragmentation pathway, suggesting that geometric isomerization occurred. Thus, to support this hypothesis, quantitative structure-retention relationships...

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Common methods for the chiral determination of amphetamine and related compounds I. Gas, liquid and thin-layer chromatography

Publikacja

- TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Rok 2011

This article reviews the most common, useful methods for the chiral determination of amphetamine (AM) and AM-deriveddesigner drugs in different of matrix, including blood, hair, urine, medicaments or standard solutions, taking into considerationarticles published in the past 15 years. We consider chromatographic methods (e.g., gas, liquid, high-performance liquid, and thinlayer). We describe several types of chiral derivatization...

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Highly sensitive microwave sensors based on open complementary square split-ring resonator for sensing liquid materials

Publikacja

C. Ds
K. S. Nagini
R. K. Barik
S. Kozieł

- SENSORS - Rok 2024

This paper presents high-sensitivity sensors based on open complementary square split-ring resonator and modified open complementary split-ring resonator operating at 4.5 GHz and 3.4 GHz, respectively. The sensors are designed for the detection of multiple liquid materials, including distilled water, methanol, and ethanol. The liquid under test is filled in a glass container loaded using a pipette. Compared to the conventional...

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Radioisotope measurements of the liquid-gas flow in the horizontal pipeline using phase method

Publikacja

R. Hanus
M. Zych
M. Jaszczur
L. Petryka
D. Świsulski

- EPJ Web of Conferences - Rok 2018

The paper presents application of the gamma-absorption method to a two-phase liquid-gas flow investigation in a horizontal pipeline. The water-air mixture was examined by a set of two Am-241 radioactive sources and two NaI(Tl) scintillation probes. For analysis of the electrical signals obtained from detectors the cross-spectral density function (CSDF) was applied. Results of the gas phase average velocity measurements for CSDF...

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The Mechanism of a Retro-Diels–Alder Fragmentation of Luteolin: Theoretical Studies Supported by Electrospray Ionization Tandem Mass Spectrometry Results

Publikacja

M. Śliwka-Kaszyńska
I. Anusiewicz
P. Skurski

- MOLECULES - Rok 2022

The mechanisms of retro-Diels–Alder fragmentation of luteolin are studied theoretically using the Density Functional Theory method (B3LYP hybrid functional) together with the 6-311++G(d,p) basis set and supported by electrospray ionization tandem mass spectrometry (ESI-MS) results. The reaction paths leading to the formation of 1,3A and 1,3B fragment ions observed as the main spectral features in the ESI-MS spectrum are described...

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Experimental and theoretical studies on the Sulfamethazine-Urea and Sulfamethizole-Urea solid-liquid equilibria

Publikacja

P. Cysewski
P. Walczak
D. Ziółkowska
I. Grela
M. Przybyłek

- JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY - Rok 2021

The miscibility of active pharmaceutical ingredients with excipients is an important aspect in pharmaceutical technology protocols. In this study, the differential scanning calorimetry (DSC) was used for Sulfamethazine-Urea (SI–U) and Sulfamethizole-Urea (SO–U) solid-liquid phase diagrams determination. Both sulfonamides form simple binary eutectics with Urea. The lack of new co-crystal phase formation was confirmed by inspection...

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Studies on the utilization of post-distillation liquid from Solvay process to carbon dioxide capture and storage

Publikacja

- SN Applied Sciences - Rok 2019

In this work, a method of precipitated calcium carbonate production from the post-distillation liquid created in the Solvay process and waste carbon dioxide was proposed and investigated. Precipitation was carried out in a model solution of calcium chloride containing ammonia at various molar ratios in relation to Ca2+ ions, while gaseous carbon dioxide was supplied to the reactor as a pure gas or as a mixture with air. It was...

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Theoretical investigation of the structural insights of the interactions of γ-Fe2O3 nanoparticle with (EMIM TFSI) ionic liquid

Publikacja

A. Sieradzan
C. Czaplewski
A. Bielicka-Gieldon
M. Bobrowski
A. Gieldon

- JOURNAL OF MOLECULAR LIQUIDS - Rok 2021

One of the possible applications of ionic liquids is to produce electricity from heat. The iron oxide nanoparticle is a potent electrical particle, which is expected to improve the heat’s efficiency to electricity conversion, however, it is prone to aggregation and sedimentation, which hamper its application. One of the methods to enhance the nanoparticle’s solubility and electrical properties is the use of a stabilizing component...

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Polymeric metal‐containing ionic liquid sorbent coating for the determination of amines using headspace solid‐phase microextraction

Publikacja

K. Yavir
P. Eor
A. Kloskowski
J. Anderson

- JOURNAL OF SEPARATION SCIENCE - Rok 2021

This study describes the design, synthesis, and application of polymeric ionic liquid sorbent coatings featuring nickel metal centers for the determination of volatile and semivolatile amines from water samples using headspace solidphase microextraction. The examined polymeric ionic liquid sorbent coatings were composed of two ionic liquid monomers (tetra(3-vinylimidazolium)nickel bis[(trifluoromethyl)sulfonyl]imide [Ni2+(VIM)4]...

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Unusual Influence of Fluorinated Anions on the Stretching Vibrations of Liquid Water

Publikacja

M. Śmiechowski

- JOURNAL OF PHYSICAL CHEMISTRY B - Rok 2018

Infrared (IR) spectroscopy is a commonly used and invaluable tool in the studies of solvation phenomena in aqueous solutions. Concurrently, ab initio molecular dynamics (AIMD) simulations deliver the solvation shell picture at a molecular detail level and allow for a consistent decomposition of the theoretical IR spectrum into underlying spatial correlations. Here, we demonstrate how the novel spectral decomposition techniques...

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