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Search results for: vaca muerta
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Diethyl carbonate as a green extraction solvent for chlorophenol determination with dispersive liquid–liquid microextraction
PublicationThe principles of green analytical chemistry indicate that the search for greener organic solvents for extraction applications is crucial. In this study diethyl carbonate (DEC) is proved to be a green solvent, as it is relatively nontoxic, obtainable from renewable resources and biodegradable. Here it is applied as an extraction solvent for chlorophenol determination in water samples with dispersive liquid–liquid microextraction....
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Charge density wave and large nonsaturating magnetoresistance in YNiC2 and LuNiC2
PublicationWe report a study of physical properties of two quasi-low-dimensional metals YNiC2 and LuNiC2 including the investigation of transport, magnetotransport, galvanomagnetic, and specific heat properties. In YNiC2 we reveal two subsequent transitions associated with the formation of weakly coupled charge density wave at TCDW=318K and its locking in with the lattice at T1=275K. These characteristic temperatures follow the previously...
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Mikroekstrakcja z wykorzystaniem cieczy jonowych - przygotowanie próbek do chromatograficznego oznaczania krótkołańcuchowych kwasów karboksylowych
PublicationPolimerowe ciecze jonowe, ze względu na wyjątkowe właściwości chemiczne i fizyczne mogą znaleźć zastosowanie w wielu technikach analitycznych. Na szczególną uwagę zasługują techniki ekstrakcyjne ograniczające zużycie rozpuszczalników organicznych. Ze względu na możliwości sterowania właściwościami cieczy jonowych poprzez odpowiedni dobór kationu i anionu, można z powodzeniem stosować je jako selektywne pokrycia włókien do SPME,...
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Ion Chromatography in Environmental Analysis of Selected Organic Acids
PublicationLow molecular mass carboxylic acids (LCAs) occur in many environmental compartments dueto natural processes and human activity. When volatile and nonvolatile acids are to be monitored then liquidchromatography, including ion chromatography seems a method of choice. At high pH the acids are inionized form and can be separated as carboxylats by means of anion exchange chromatography. LCAs canalso be separated at low pH by ion exclusion...
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Soxhlet Extraction and New Developments Such as Soxtec in: Comprehansive Sampling and Sample Preparation
PublicationSoxhlet extraction is one of the most popular techniques for extraction of analytes from solid materials. Since its discovery in 1879, the standard Soxhlet technique has been routinely applied in almost every analytical laboratory. Up to this day, Soxhlet extraction technique remains a standard technique to which the performance of modern extraction techniques is compared.Over the years, an intensive research on different modifications...
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Determination of Selected Organic Acids in Animal Farm Water Samples by Ion Chromatography
PublicationLow molecular mass carboxylic acids (LCAs) occur in many environmental compartments due to natural processes and human activity. They are an important group of organic pollutants of waste water that mainly includes, volatile fatty acids, and also dicarboxylic, aromatic, hydroxy- and ketoacids. LCAs are present in the environment at concentrations between 1 to 5000 ppm and different methods have been reported for their determination...
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Environmental fate of BTEX compounds in ambient air
PublicationAs a result of the industrialization and urbanization in the world, human pressure on the environment is intensifying, leading to detrimental changes in both biotic and abiotic compartments. One of the many consequences of this state of affairs is the increasing rate of emission into the atmosphere of volatile organic compounds, including the so-called BTEX (benzene, ethylbenzene, toluene, xylenes) compounds. The article reviews...
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New Technique of preparation of standard gas mixtures needed for validation of analytical procedures used in environmental studies
PublicationStandard gas mixtures are indispensable reference materials for ensuring the reliability of analytical work. Paper presents one novel approach in the field of production of gaseous reference materials based on the application of thermal decomposition process of proper surface compound for obtaining the desired gaseous analyte. The main fields of application of reference materials are presented. The field of application of thermal...
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Standard of living in Poland at regional level - classification with Kohonen self-organizing maps
PublicationThe standard of living is spatially diversified and its analyzes enable shaping regional policy. Therefore, it is crucial to assess the standard of living and to classify regions due to their standard of living, based on a wide set of determinants. The most common research methods are those based on composite indicators, however, they are not ideal. Among the current critiques moved to the use of composite...
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Correlation between charge density waves and antiferromagnetism in Nd1−xGdxNiC2 solid solutions
PublicationWe report a study on the evolution of a charge density wave and antiferromagnetism in the series of the polycrystalline solid solution Nd1−xGdxNiC2 (0 _ x _ 1) by means of magnetic and transport properties measurements. The experimental results reveal the violation of the de Gennes law and a strong correlation between the Peierls, Néel, and Curie-Weiss temperatures, which strongly suggests a cooperative interaction between the...
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Experimental investigations on heat transfer enhancement in shell coil heat exchanger with VARIABLE Baffles GEOMETRY
PublicationThe paper presents the possibility of using passive intensification of heat transfer in the form of baffles to increase the energy efficiency of the shell and coil heat exchanger. The experiment was carried out by using a modular coil heat exchanger in the form of an electric heater. Water was used as a working fluid with constant thermal-flow parameters at the inlet of the module. It should be noted that experiments were made...
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New matrix-free reference material for ethene in the form of optical fibres
PublicationReference materials are indispensable in the qualitycontrol and quality assurance of analytical measurements. Onenovel approach to the generation of standard gaseous mixturesof toxic, reactive, volatile, labile, and malodorous substancesinvolves thermal decomposition or rearrangement, under definedtemperature conditions, of compounds immobilized, bychemical bonding, on the surface of an appropriate carrier torelease specific amounts...
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EKSTRAKCJA ANALITÓW Z PRÓBKI ZMIESZANEJ Z OBOJĘTNYM WYPEŁNIACZEM (MSPD)
PublicationTechnika ekstrakcji analitów z próbki zmieszanej z obojętnym wypełniaczem (MSPD) znajduje coraz szersze zastosowanie jako technika jednoczesnego przygotowania, ekstrakcji, frakcjonowania i oczyszczania ekstraktów z próbek stałych, pół-stałych i lepkich. Najczęściej używana jest do przygotowania próbek środowiskowych, biologicznych oraz żywności zarówno w celu ekstrakcji naturalnie występujących związków, jak i zanieczyszczeń organicznych...
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Synteza i badanie struktury nanoprętów V2O5 wytworzonych metodą zol-żel
PublicationPraca ta przedstawia wyniki badań struktury cienkich warstw tlenku wanadu otrzymanych metodą zol - żel. Cienkie warstwy osadzano metodą spin - coating na podłożach ze szkła kwarcowego oraz krzemowych a następnie wygrzewano w różnych temperaturach w zakresie od 400 °C do 600 °C w celu określenia optymalnej temperatury krystalizacji nanoprętów. Otrzymane próbki przebadano metodą dyfraktometrii rentgenowskiej, skaningowym mikroskopem...
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KO-FERMENTACJA METANOWA JAKO ALTERNATYWNA METODA ZAGOSPODAROWANIA ZANIECZYSZCZONEJ BIOMASY
PublicationJedną z przyczyn ograniczonego stosowania fitoremediacji jest powstawanie zanieczyszczonej biomasy, dla której wciąż nie opracowano odpowiedniej technologii zagospodarowania lub unieszkodliwiania. W pracy przedstawiono sposób redukcji objętości biomasy, powstającej w wyniku fitoremediacji, metodą fermentacji metanowej. Głównym zagadnieniem jest intensyfikacja produkcji biogazu w procesie ko-fermentacji dwóch lub większej liczby...
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E-experiments in physics. Proper business process management, collaborative development process and project management guidance – remedy for avoiding the main IT project’s failure
PublicationOnly a few of learning aids and simulations of physical phenomena allow for building interactive experiments; experiments similar to those that should be conducted in physics laboratories at schools. Group of staff from Gdansk University of Technology decided to fill this market niche by designing and constructing a set of virtual experiments – so called e-experiments. To avoid common problems that a lot of IT products brought...
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Cellular Distribution of Aquaporin 3, 7 and 9 in the Male Reproductive System: A Lesson from Bovine Study (Bos taurus)
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Dynamiczny system magazynowania energii w kołach zamachowych FW
Research EquipmentKinematyczny zasobnik energii elektrycznej 1,11 kW z wysokoobrotowym kołem zamachowym (18000-36000 obr./min.)
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Heptaene macrolides biosynthesis by Streptomyces species
PublicationPolyene macrolides are one of the groups of secondary metabolites, generated by microorganisms belonging to the Streptomyces genus. These compounds, containing 3 - 7 conjugated double bonds systems in their molecules exhibit high antifungal activity against a broad spectrum of fungal pathogens with heptaenes demonstrating the highest antifungal potential. At the large extent, efficiency of biosynthesis of these natural products...
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Metoda PMRA oceny ryzyka przedsięwzięć informatycznych.
PublicationArtykuł prezentuje metodę PMRA (ang. Process Model-based Risk Assessment) oceny ryzyka przedsięwzięć informatycznych. W metodzie PMRA zaproponowano identyfikację ryzyka na podstawie własności strukturalnych modeli procesów. Dla tego celu opracowano model ryzyka wyprowadzony z rozszerzonego meta-modelu procesów biznesowych oraz wyposażony w język wzorców do opisu ryzyka. Zdefiniowano model bazy wiedzy o ryzyku obejmującej modele...
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Analysis of the Factors Affecting Static In Vitro Pepsinolysis of Food Proteins
PublicationIn this meta-analysis, we collected 58 publications spanning the last seven decades that reported static in vitro protein gastric digestion results. A number of descriptors of the pepsinolysis process were extracted, including protein type; pepsin activity and concentration; protein concentration; pH; additives; protein form (e.g., ‘native’, ‘emulsion’, ‘gel’, etc.); molecular weight of the protein; treatment; temperature; and...
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Numerically Efficient Miniaturization-Oriented Optimization of an Ultra-Wideband Spline-Parameterized Antenna
PublicationDesign of ultra-wideband radiators for modern handheld applications is a challenging task that involves not only selection of an appropriate topology, but also its tuning oriented towards balancing the electrical performance and size. In this work, a low-cost design of a compact, broadband, spline-parameterized monopole antenna has been considered. The framework used for the structure design implements trust-region-based methods,...
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DNA methylation as a mediator of HLA-DRB1*15:01 and a protective variant in multiple sclerosis
PublicationThe human leukocyte antigen (HLA) haplotype DRB1*15:01 is the major risk factor for multiple sclerosis (MS). Here, we find that DRB1*15:01 is hypomethylated and predominantly expressed in monocytes among carriers of DRB1*15:01. A differentially methylated region (DMR) encompassing HLA-DRB1 exon 2 is particularly affected and displays methylation-sensitive regulatory properties in vitro. Causal inference and Mendelian randomization...
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Architectural project IV, 2022/23, KTHAiKZ
e-Learning CoursesArchitectural project IV, 2022/23
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Teoria projektowania architekt. Ergonomia
e-Learning CoursesKurs obowiązkowy dla studentów II sem architektury. Pierwsze zajęcia zaczynają się 09.05.2022 o godzinie 17:00
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Projekt grupowy/badawczy 2021
e-Learning CoursesProjekt grupowy Fizyka medyczna, Nanotechnologia, Inżynieria Materiałowa - Brygida Mielewska
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Architectural project I 2021/22 - Grupa1
e-Learning CoursesThe aim of our course is to teach you how to design architecture. The process of creation architecture is not just about function and construction. It is more, it is about creation of original, form with individual features and beauty that will become a meaningful part of our environment. Therefore we base our course of architectural design on the connection with art. We continue a tradition of the famous Bauhaus school were...
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Architectural Project Sem. II 2021/2022
e-Learning CoursesProwadzący: dr hab. inż. arch. Jacek Krenz, prof. PG mgr inż. arch. Marta Golińska Architecture influenced by Art The aim of the course is to teach the method of creating an architectural form in a style that reflects a given topic drawn in the form of an ideogram. Creating architecture in this way makes it possible to endow the architectural form with meanings so that it becomes an important element of the existential space....
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Inżynieria oprogramowania 2022
e-Learning CoursesKurs dla VI/VII sem. FT/IS edycja 2022/2023
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Oprogramowanie aplikacyjne 2022
e-Learning CoursesKurs dla VII sem. FT/IS edycja 2022/2023
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Architectural Project II 2022/2023
e-Learning CoursesProwadzący: dr hab. inż. arch. Jacek Krenz, prof. PG mgr inż. arch. Marta Golińska Architecture influenced by Art The aim of the course is to teach the method of creating an architectural form in a style that reflects a given topic drawn in the form of an ideogram. Creating architecture in this way makes it possible to endow the architectural form with meanings so that it becomes an important element of the existential space....
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Zastosowanie metod ekonometrycznych
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Metody syntezy nanomateriałów
e-Learning Courses -
Podstawy inżynierii genetycznej_Nowy 2024/2025
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MK_10/2_Planowanie partycypacyjne - Gospodarka Przestrzenna
e-Learning CoursesProwadzący: dr inż. arch. Monika Arczyńska dr inż. arch. Łukasz Pancewicz mgr. inż. arch. Marta Waczyńska Cel zajęć - Teoria i praktyka partycypacji Celem zajęć jest zapoznanie studentów z teoretyczną i praktyczną wiedzą nt. partycypacji w procesach projektowania i planowania przestrzeni. Kurs został przygotowany tak, aby objąć zarówno działania realizowane przez samorządy jak i organizacji pozarządowe, działające oddolnie....
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[15.03.2023] Information meeting for 4-th year PhD students
e-Learning CoursesInformation meeting on 15.03.2023 4th-year PhD students
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Metody Syntezy Nanomateriałów
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Architectural project IV, 2023/24
e-Learning CoursesArchitectural project IV, 2023/24
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Prediploma Project SAUP 2023/24
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Inżynieria oprogramowania 2024
e-Learning CoursesKurs dla VI/VII sem. FT/IS edycja 2023/2024
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COVID-19 vaccine booster hesitancy (VBH) of healthcare professionals and students in Poland: Cross-sectional survey-based study
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test test
ProjectsProject realized in West Pomeranian University of Technology in Szczecin according to test agreement from 2024-03-13
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Różnorodność form i rozmiarów - nowa droga syntezy nanostruktur związków z grupy (NH4)xMyOz (M = V, Mo, W)
ProjectsProject realized in Department of Solid State Physics from 2017-12-08
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Analysis of influence of peroxide initiators structure on efficiency of dynamic cross-linking of aliphatic polyesters and their blends.
ProjectsProject realized in Department of Polymers Technology according to UMO-2018/29/N/ST8/02042 agreement from 2019-01-31
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65-lecie Wydziału ETI
EventsW dniach 26 i 27 maja w ramach obchodów jubileuszu 65-lecia odbędą się spotkania z absolwentami, prezentacja Wydziału dla kandydatów na studia, turnieje i konkursy.
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Testing Stability of Digital Filters Using Multimodal Particle Swarm Optimization with Phase Analysis
PublicationIn this paper, a novel meta-heuristic method for evaluation of digital filter stability is presented. The proposed method is very general because it allows one to evaluate stability of systems whose characteristic equations are not based on polynomials. The method combines an efficient evolutionary algorithm represented by the particle swarm optimization and the phase analysis of a complex function in the characteristic equation....
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The effect of shear deformations' rotary inertia on the vibrating response of multi-physic composite beam-like actuators
PublicationIn consecutive studies on flexomagneticity (FM), this work investigates the flexomagnetic reaction of a vibrating squared multi-physic beam in finite dimensions. It is assumed that the bending and shear deformations cause rotary inertia. In the standard type of the Timoshenko beam the rotary inertia originated from shear deformations has been typically omitted. It means the rotary inertia resulting from shear deformation is a new...
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Three phase transient model of wet coal pyrolysis
PublicationA one-dimensional transient mathematical model was developed to describe the thermal and flow phenomena during coal pyrolysis in a coke oven. The model was solved numerically using partly implicit methods for gas flow and heat transfer problems. It was successfully validated with industrial-scale measurements of temperature change in the middle-plane of the coke oven chamber. The evolution of temperature and pressure, distributions...
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Corncob-supported calcium oxide nanoparticles from hen eggshells for cadmium (Cd-II) removal from aqueous solutions; Synthesis and characterization
PublicationThis 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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Flame retardant epoxy/halloysite nanotubes nanocomposite coatings: Exploring low-concentration threshold for flammability compared to expandable graphite as superior fire retardant
PublicationEpoxy nanocomposites containing halloysite nanotubes (HNTs) were developed and their low-concentration thresholds for thermal stability and flame retardancy were compared with that of epoxy system containing expandable graphite (EG), as a reference with superior flame retardancy. The effects of HNTs and EG on the peak of Heat Release Rate (pHRR), Total Heat Release (THR), and Time-To-Ignition (TTI) of the prepared samples were...