Wyniki wyszukiwania dla: FLUIDIZED BED EXTRACTION
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Development and optimization of modified nucleosides and deoxynucleosides simultaneous extraction with the use of Design of Experiments approach
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Paraffin-Embedded Tissue as a Novel Matrix in Metabolomics Study: Optimization of Metabolite Extraction Method
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Development and validation of urinary nucleosides and creatinine assay by capillary electrophoresis with solid phase extraction
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Micro-cloud point extraction for preconcentration of Aspirin in commercial tablets prior to spectrophotometric determination
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Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes
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Effect of the ionic liquids on extraction of aromatic and sulfur compounds from the model petrochemical stream
PublikacjaSuitability of a imidazolium ionic liquids (ILs) as solvents in dearomatization and desulfurization in the ternary systems and in a model multicomponent systems has been analyzed. With this aim, ternary liquid-liquid phase equilibrium data (LLE) have been obtained for ternary mixtures of {IL + benzene, or toluene, or thiophene, or 2-butanethiol + hexane}, or {IL + benzene + 2-methylpentane} at T = 298.15 K and ambient pressure,...
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Signals Features Extraction in Radioisotope Liquid-Gas Flow Measurements using Autocorrelation Function
PublikacjaKnowledge of the two-phase flow structure is essential for the proper conduct of industrial processes. Description of liquid-gas flow regimes is possible by using of data analysis in time, frequency, or state-space domain. In this research studies, the autocorrelation function is applied for analysis of signals obtained for liquid-gas flow by use gamma-ray absorption. The experiments were carried out on the laboratory hydraulic...
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Buried Object Characterization by Data-Driven Surrogates and Regression-Enabled Hyperbolic Signature Extraction
PublikacjaThis work addresses artificial-intelligence-based buried object characterization using FDTD-based electromagnetic simulation toolbox of a Ground Penetrating Radar (GPR) to generate B-scan data. In data collection, FDTD-based simulation tool, gprMax is used. The task is to estimate geophysical parameters of a cylindrical shape object of various radii, buried at different positions in the dry soil medium simultaneously and independently...
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Sample preparation procedure using extraction and derivatization of carboxylic acids from aqueous samples by means of deep eutectic solvents for gas chromatographic-mass spectrometric analysis
PublikacjaThe paper presents a new procedure for the determination of organic acids in a complex aqueous matrixusing ultrasound-assisted dispersive liquid–liquid microextraction followed by injection port derivati-zation and GC–MS analysis. A deep eutectic solvent (choline chloride: 4-methylphenol in a 1:2 mol ratio)was used both as an extracting solvent and as a derivatizing agent to yield ion pairs which were next con-verted to methyl...
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Understainding solid-phase microextraction: key factors influencing the extraction process and trends in improving the technique
PublikacjaAnalytical chemists are faced with the daunting challenges of accurately monitoring the state of the environment and the processes taking place in it and of determining an enormous range of analytes often present in trace and ultratrace amounts in sample matrixes with complex or variable compositions. Further challenges are presented by the need to introduce new methodologies into current analytical practice and equipment to comply...
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Application of a magnetically separable Zr-MOF for fast extraction of palladium before its spectrophotometric detection
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Glycerolic Licorice Extracts as Active Cosmeceutical Ingredients: Extraction Optimization, Chemical Characterization, and Biological Activity
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Device characteristics extraction by low frequency noise measurements; Someresults on the state-of-the-art MOSFET´s
PublikacjaPrzedstawiono wyniki pomiarów i analizy szumów tranzystorów MOSFET z izolatorem bramki wykonanym z SiO2 i HfO2. Wyniki pomiarów wykorzystano do oszacowania gęstości aktywnych stanów na powierzchni użytego tlenku i porównano z wynikami otrzymanymi metodą charge-pumping.
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Determination of pesticides in water using new solid phase extraction technique - speedisk and speedisk column.
PublikacjaW publikacji opisano zastosowanie nowych narzędzi do ekstrakcji do fazy stałej: szybkie dyski i szybkie kolumienki (speedisk i speedisk column). Zaprezentowano ich zastosowanie do ekstrakcji pestycydów z próbek wody, przy zastosowaniu różnych rozpuszczalników.
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Synthesis and structural properties of carbon/alumina composites: Practical application in solid phase extraction of explosives
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Small signal admittance spectroscopy applied for extraction of charge carrier mobility in thin organic layers
PublikacjaPraca przedstawia nowy sposób wyznaczania ruchliwości nośników ładunku w cienkich warstwach organicznych w oparciu o pomiary widm małosygnałowej admitancji.
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Supercritical fluid extraction of algae enhances levels of biologically active compounds promoting plant growth
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The Copper(II) Ions Solvent Extraction with a New Compound: 2,6-Bis(4-Methoxybenzoyl)-Diaminopyridine
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Continuous Monitoring of Thermooxidative Degradation Products of Polystyrene by Membrane Extraction with Sorbent Interface and Gas Chromatography
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Green energy extraction for sustainable development: A novel MPPT technique for hybrid PV-TEG system
PublikacjaThe Photovoltaic (PV) module converts only a small portion of irradiance into electrical energy. Most of the solar energy is wasted as heat, resulting in a rise in PV cell temperature and a decrease in solar cell efficiency. One way to harvest this freely available solar thermal energy and improve PV cell efficiency is by integrating PV systems with thermoelectric generators (TEG). This cogeneration approach of the hybrid PV-TEG...
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Development of an orbital shaker-assisted fatty acid-based switchable solvent microextraction procedure for rapid and green extraction of amoxicillin from complex matrices: Central composite design
PublikacjaIn this study, a cheap, fast and simple orbital shaker-assisted fatty acid-based switchable solvent microextraction (OS-FASS-ME) procedure was developed for the extraction of amoxicillin (AMOX) in dairy products, pharmaceutical samples and wastewater prior to its spectrophotometric analysis. Fatty acid-based switchable solvents were investigated for extracting AMOX. The key factors of the OS-FASS-ME procedure were optimized using...
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Application of polyethylene glycol-coated iron oxide nanoparticles for magnetic solid phase extraction of copper from seawater samples and its determination by graphite furnace atomic absorption spectrometry using response surface methodology for optimization of extraction
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Development of UV/H 2 O 2 /TiO 2 –LECA hybrid process based on operating cost: Application of an effective fixed bed photo-catalytic recycled reactor
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SPECTROPHOTOMETRIC DETERMINATION OF FOUR NAPHTHALENE SULFONATES IN SEAWATER AFTER THEIR MOLECULARLY IMPRINTED STIR BAR SORPTIVE EXTRACTION
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GC-FID determination of C2-C4 aliphatic monocarboxylic acids in aqueous samples preceded by solvent extraction
PublikacjaEkstrakcja za pomocą eteru metylo-tert-butylowego (MTBE) została wykorzystana do izolacji krótkołańcuchowych alkanowych kwasów monokarboksylowych (2-4 atomy węgla w cząsteczce) z próbek o matrycy wodnej. Całkowita wydajność dwukrotnej ekstrakcji z próbek wodnych kwasów: octowego, propionowego i masłowego wynosiła odpowiednio ok. 55% , ok. 90% i ponad 90%. Wydajności ekstrakcji są porównywalne z wartościami uzyskiwanymi w przypadku...
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Multivariable optimization of ultrasound-assisted solvent extraction of bee pollen prior to its element analysis by FAAS
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Extraction Methods of 10-Deacetylbaccatin III, Paclitaxel, and Cephalomannine from Taxus baccata L. Twigs: A Comparison
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The Influence of Purge Times on the Yields of Essential Oil Components Extracted from Plants by Pressurized Liquid Extraction
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The application of single drop extraction technique for chromatographic determination of solvent residues in edible oils and pharmaceutical products
PublikacjaW pracy przedstawiono zalety i wady techniki ekstrakcji do pojedynczej kropli, będącą prostą i tanią alternatywą dla mikroekstrakcji do fazy stacjonarnej. Ponadto opisano dwie analityczne procedury do chromatograficznego oznaczania wybranych rozpuszczalników organicznych (heksanu, benzenu, toluenu oraz trichlorometanu, 1,1,1-trichloroetanu, tetrachlorometanu, trichloroetylenu, tetrachloroetenu)w olejach jadalnych i próbkach farmaceutycznych....
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Novel anion receptors: hybrid materials based on quaternary ammonium salts for selective extraction of dichromate ions
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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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Glycerol and Natural Deep Eutectic Solvents Extraction for Preparation of Luteolin-Rich Jasione montana Extracts with Cosmeceutical Activity
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Deep Eutectic Solvent Stir Bar Sorptive Extraction: A Rapid Microextraction Technique for the Determination of Vitamin D3 by Spectrophotometry
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Solid phase extraction clean up of soil and sediment extracts for the determination of various types of pollutants in a single run.
PublikacjaOpisano nową procedurę oczyszczania ekstraktów rozpuszczalnikowych (uzyskanych w trakcie obróbki próbek gleby i osadów dennych) z wykorzystaniem techniki ekstrakcji do fazy stałej. Oryginalność podejścia polega na znalezieniu takiej kombinacji sorbentów, że uzyskuje się ekstrakt przygotowany do analizy chromatograficznej na zawartość różnych typów zanieczyszczeń (polichlorowane bifenyle, wielopierścieniowe węglowodory aromatyczne,...
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Automated high-capacity sorption probe for extraction of organic compounds in aqueous samples followed by gas chromatographic analysis.
PublikacjaOpracowano zautomatyzowany zestaw wyposażony w próbnik o dużej pojemności sorpcyjnej do oznaczania związków śladowych z zastosowaniem chromatografii gazowej. Zestaw łączy prostotę SPME z wysoką wydajnością techniki ekstrakcji z zastosowaniem ruchomego elementu sorpcyjnego (SBSE). Procedura pobierania próbek była przeprowadzana z zastosowaniem podajnika automatycznego. Ze względu na pełną automatyzację zestawu, możliwa jest bezobsługowa...
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Enhanced extraction of proteins using cholinium-based ionic liquids as phase-forming components of aqueous biphasic systems
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Impact of humic acids, temperature and stirring on passive extraction of pharmaceuticals from water by trihexyl(tetradecyl)phosphonium dicyanamide
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Determination of twenty pharmaceutical contaminants in soil using ultrasound-assisted extraction with gas chromatography-mass spectrometric detection
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The loss of essential oil components induced by the Purge Time in the Pressurized Liquid Extraction (PLE) procedure of Cupressus sempervirens
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Some aspects of the analysis of environmental pollutants in sediments using pressurized liquid extraction and gas chromatography-mass spectrometry
PublikacjaOpisano wyniki badań nowej procedury oznaczania analitów z grupy wielopierścieniowych węglowodorów aromatycznych oraz polichlorowanych bifenyli w próbkach osadów dennych. Szczególnie dużo uwagi poświęcono zbadaniu możliwości wykorzystania techniki przyspieszonej ekstrakcji analitów za pomocą rozpuszczalnika na etapie izolacji wzbogacania. Ustalono również warunki oznaczeń końcowych z wykorzystaniem techniki GC-MS.
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Studies on applicability of new solid-phase microextraction fibers for the selective extraction and determination of short - chain monocarboksylic acids
PublikacjaShort-chain monocarobxylic acids, sometimes referred to as volatile fatty acids (VFA), are a group of low molecular weight alkyl monocarboxylic acids that are widely distributed within the environment. These molecules contain any from 2 to 8 carbon atoms and originate from the anaerobic biodegradation of organic matter such as carbohydrates, proteins, and fats. These compounds are commonly found in the effluents from animal farming,...
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Combined operation of 900MW power plant with the ORC through the bleed steam extraction point and CO2 recovery system
PublikacjaThe work presented here is aimed at utylisation of waste heat in the reference supercritical power plant in the manner to produce electricity in ORC installation. The waste heat is available in the form of a stream of hot water at 90 C, recovered from the exhaust gases in the amount of 200MW. Such low enthalpy heat source is rather insufficient to produce a good quality vapour to feed the ORC turbine. Therefore an original approach...
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Chemometric determination of solute-affected solvent vibrational spectra as a superior way of information extraction on solute solvation phenomena
PublikacjaW pracy zaprezentowano dwie chemometryczne metody wyznaczania widm zaburzonych rozpuszczalnika oraz liczby cząsteczek zaburzonych, na podstawie zmierzonych serii wibracyjnych widm FT-IR roztworów substancji. Pierwsza z metod została stworzona na podstawie Namiarowej Analizy Faktorowej (ang. Target Factor Analysis). Druga z nich wykorzystuje algorytm izolacji widm czystych składników z serii widm mieszanin. Działanie obu metod zostało...
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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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Developing a New Micro Cloud Point Extraction Method for Simultaneous Preconcentration and Spectrophotometric Determination of Uranium and Vanadium in Brine
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Extraction of mass spectra free of background and neighboring component contributions from gas chromatography/mass spectrometry data
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OBTAINING ANTHOCYANINS FROM CHOKEBERRY, BLACKCURRANT AND ELDERBERRY FRUITS, AND FROM ROOTS OF BLACK CARROT USING EXTRACTION METHOD
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Comparative assessment of two extraction procedures for determination of bioactive compounds in some berries used for daily food consumption
PublikacjaTwo extractions with methanol and water were used to determine the antioxidant and binding properties of some berries as a supplement to food. Fluorometry, FTIR spectra and radical scavenging assays were used for characterisation of bioactive compounds (polyphenols, flavonoids, flavanols and tannins) and the levels of their antioxidant activities (AAs). The contents of bioactive compounds and AAs in water and methanol polyphenol...
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New-fangled sources of cellulose extraction: comparative study of the effectiveness of Cissus latifolia and Ficus benghalensis cellulose as a filler
PublikacjaRecycled polymers and biopolymers are receiving a great deal of attention these days. If these two can be combined, it will lead to an environment-friendly green material with a great deal of applications. Here the present work is about incorporating bio-based fillers in a recycled polyurethane matrix. Two unusual and extremely novel sources of cellulose have been proposed. The celluloses obtained from Cissus latifolia and Ficus...
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Selectivity Tuning by Natural Deep Eutectic Solvents (NADESs) for Extraction of Bioactive Compounds from Cytinus hypocistis—Studies of Antioxidative, Enzyme-Inhibitive Properties and LC-MS Profiles
PublikacjaIn the present study, the extracts of Cytinus hypocistis (L.) L using both traditional solvents (hexane, ethyl acetate, dichloromethane, ethanol, ethanol/water, and water) and natural deep eutectic solvents (NADESs) were investigated in terms of their total polyphenolic contents and antioxidant and enzyme-inhibitive properties. The extracts were found to possess total phenolic and total flavonoid contents in the ranges of 26.47–186.13...