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Gdańsk University of Technology

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Publications from the year 2014

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  • Personal Entrepreneurial Potential in the Opinion of Young Women Entering the Labor Market
    • Katarzyna Stankiewicz
    2014

    In the current economic situation in Europe the need to stimulate entrepreneurship, with the special attention to develop the entrepreneurship among women, is clearly emphasized. The action is mostly taken to encourage the use of internal potential of possible future entrepreneurs. Do we know what the potential really is ? The presented article deals with the issues of women's entrepreneurship, demonstrating results of self assessment of their entrepreneurial potential. The study focused on both the assessment of responders strengths / advantages enabling entrepreneurial activity as well as their attitudes towards self--employment.

  • Pharmaceutical and forensic drug applications of chiral supercritical fluid chromatography
    • Justyna Płotka-Wasylka
    • Marek Biziuk
    • Calum Morrison
    • Jacek Namieśnik
    2014 TRAC-TRENDS IN ANALYTICAL CHEMISTRY

    THE 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 CAN BE USED AS AN ALTERNATIVE TO HPLC FOR MANY DRUG SUBSTANCES, SO IT IS GAINING POPULARITY IN THE PHARMACEUTICAL INDUSTRY. THE MAIN ADVANTAGES OF SFC IN SEPARATING CHIRAL PHARMACEUTICALS ARE: HIGH SPEED, SHORT ANALYSIS TIME, LIMITED ENVIRONMENTAL IMPACT AND HIGH EFFICIENCY. THE REDUCTION IN THE USE OF ORGANIC SOLVENTS HAS COST, HEALTH, AND SAFETY BENEFITS. DUE TO THESE ADVANTAGES, SFC FULFILLS ALL THE REQUIREMENTS OF GREEN ANALYTICAL CHEMISTRY APPROACHES. IN THIS ARTICLE, WE PRESENT APPLICATION OF SFC AS A TOOL FOR CHIRAL SEPARATION OF PHARMACEUTICALS AND DRUGS OF ABUSE.

  • Phase change thermal energy storage – the experience of the materials preparation for the specific applications.
    • Ewa Klugmann-Radziemska
    • Patrycja Wcisło-Kucharek
    • Hubert Denda
    • Michał Ryms
    2014

    Thermal energy storage and temperature stabilization is very important in many engineering applications. There are three kinds of thermal energy storage: sensible heat, latent heat and reversible chemical reaction heat. Phase change materials (PCM) absorb, store and release large amounts of energy in the form of latent heat, at constant temperature, called the transition temperature. Many innovative applications could be found for phase change materials in an increasingly growing field, which is protection of the environment through energy saving, use of renewable energy sources, especially solar, raising the efficiency of equipment and technologies in the industry, construction and transport. Main potential possibilities of using PCM materials are as follows: accumulation heat from the solar collectors and other renewable sources, the accumulation of heat in structural elements of buildings, the food industry. Therefore the applications of the PCM are of promising perspectives, especially in some climate regions. In the present paper, the experience of phase change material use for the specific applications and the results of its thermophysical properties examination are presented.

  • Phase Change Thermal Energy Storage – The Experience of the Materials Preparation for the Specific Applications.
    • Ewa Klugmann-Radziemska
    • Patrycja Wcisło-Kucharek
    • Hubert Denda
    • Michał Ryms
    2014 Polska Energetyka Słoneczna

    Thermal energy storage and temperature stabilization is very important in many engineering applications. There are three kinds of thermal energy storage: sensible heat storage, latent heat storage and reversible chemical reaction heat storage. Phase change materials (PCM) absorb, store and release large amounts of energy in the form of latent heat, at constant temperature, called the transition temperature. The amount of heat stored during the heating of any material is much less than its phase transition, which additionally provides temperature stabilization. According to phase change behavior, PCMs can be generally divided into four categories: solid-solid, solid-liquid, solid-gas and liquid-gas PCMs. According to the solid-liquid type of PCMs, PCMs can be divided into organic PCMs, inorganic PCMs and eutectic. Many interesting and innovative applications could be found for phase change materials in an increasingly growing field, which is protection of the environment through respect and energy saving, use of renewable energy sources, especially solar, raising the efficiency of equipment and technologies in the industry, construction, agriculture, transport and communication. Main potential possibilities of using PCM materials are as follows: accumulation heat from the solar collectors and other renewable sources, heat magazines for power consumption during the peak period, the accumulation of heat in structural elements of buildings, the food industry and other processes technology for short-term, but significant peak demand of energy, the transport and storage of foodstuffs (hot or cold), medical substances, blood, organs for transplantation, temperature stabilization of electronic systems, the cooling systems of internal combustion engines, stabilization of the batteries temperature in electrical vehicles and providing thermal comfort in cabins of vehicles. Therefore the applications of the PCM are of promising perspectives, especially in some climate regions. Additionally some material could be modified, for example by using different paraffin, the melting temperature of PCM can be adjusted. In the present paper, the experience of the materials preparation and use for the specific applications and the results of its thermophysical properties examination are presented.

  • Phase Separation and Electrical Properties of Manganese Borosilicate Glasses
    • Piotr Kupracz
    • Natalia Anna Wójcik
    • Maria Gazda
    • Jakub Karczewski
    • Ryszard Jan Barczyński
    2014 Full text Procedia Engineering

    The structure and electrical properties of manganese borosilicate glasses of a composition of xMnO-(0.8-x)SiO2-(0.2)B2O3 (x=0.4, 0.5 and 0.6 in mol) were investigated by impedance spectroscopy, SEM, XRD and confocal microscopy methods. The influence of composition on the glass structure and electrical properties was discussed. A separation of two amorphous phases was observed and it was concluded that one phase is SiO2-rich and the other is MnO-rich. It was found that the direct current conductivity and the activation energy of conductivity decreases with an increase in the manganese oxide content. The proposed mechanism of the conductivity is overlapping large polaron hopping.

  • Phase separation in poly(butylene terephthalate)-based materials prepared by solid-state modification
    • Erik Gubbels
    • Lidia Jasińska-Walc
    • Daniel Hermida-Merino
    • Michael Ryan Hansen
    • Bart Noordover
    • Anne Spoelstra
    • Han Goossens
    • Cor E. Koning
    2014 POLYMER

    The morphology of a series of poly(butylene terephthalate) (PBT)/fatty acid dimer diol (FADD)-based copolyesters prepared by solid-state modi fi cation (SSM) was studied. It was shown that in copolyesters containing less than 10 wt% FADD two different phases, i.e. a PBT crystalline phase and a PBT-rich amorphous phase, are present. The FADD residues were more or less homogeneously distributed throughout the interlamellar regions. For copolymers containing more than 10 wt% of FADD, a three- phase morphological model has to be used due to phase separation of a FADD-rich amorphous phase from the PBT-rich matrix, as con fi rmed by solid-state nuclear magnetic resonance spectroscopy and transmission electron microscopy. The fi nal morphology was dependent on the morphology of the PBT/ FADD-based physical mixtures prior to SSM. In addition, it was shown that FADD diffusion during SSM influences the final morphology.

  • Phenotypic consequences of LYS4 gene disruption in Candida albicans
    • Iwona Gabriel
    • Krzysztof Kur
    • Sonia S. Laforce-Nesbitt
    • Anoop S. Pulickal
    • Joseph M. Bliss
    • Sławomir Milewski
    2014 YEAST

    A BLAST search of the Candida Genome Database with the Saccharomyces cerevisiae LYS4 sequence known to encode homoaconitase (HA) revealed ORFs 19.3846 and 19.11327. Both alleles of the LYS4 gene were sequentially disrupted in Candida albicans BWP17 cells using PCR-based methodology. The null lys4Δ mutant exhibited lysine auxotrophy in minimal medium but was able to grow in the presence of L-Lys and α-aminoadipate, an intermediate of the α-aminoadipate pathway, at millimolar concentrations. The presence of D-Lys and pipecolic acid did not trigger lys4Δ growth. The C. albicans lys4Δ mutant cells demonstrated diminished germination ability. However, their virulence in vivo in a murine model of disseminated neonatal candidiasis appeared identical to that of the wild-type strain. Moreover, there was no statistically significant difference in fungal burden of infected tissues between the strains.

  • Phosphate tricyclic coumarin analogs as steroid sulfatase inhibitors: synthesis and biological activity.
    • Witold Kozak
    • Mateusz Daśko
    • Maciej Masłyk
    • Jerzy S. Pieczykolan
    • Bartłomiej Gielniewski
    • Janusz Rachoń
    • Sebastian Demkowicz
    2014 RSC Advances

    In the present work, we report convenient methods for the synthesis and biological evaluation of phosphate tricyclic coumarin derivatives as potential steroid sulfatase inhibitors. The described synthesis includes the straightforward preparation of 7-hydroxy-2,3-dihydro-1H-cyclopenta[c]chromen-4-one, 3-hydroxy-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one and 3-hydroxy-8,9,10,11-tetrahydro-7H-cyclohepta[c]chromen-6-one modified with various phosphate moieties. The inhibitory effects of the synthesized compounds were tested on STS isolated from human placenta as well as the MCF-7, MDA-MB-231 and MDA-MB-435S cancer cell lines. Most of the new STS inhibitors possessed IC50 values between 21 to 159 μM. In the course of our investigation, the largest inhibitory effects in the STS enzyme assays were observed for the three compounds 9p, 9r and 9s, with IC50 values of 36.4, 37.8 and 21.5 μM, respectively (IC50 value of 1.0 μM for the 665-COUMATE used as a reference). The compound 9r, exhibited the highest potency against MCF-7, an estrogen receptor positive (ER+) cell line, with a GI50 value of 24.7 μM. The structure-activity relationships of the synthesized coumarin derivatives with the STS enzyme are discussed.

  • Photo-elastic and DIC techniques to study development of dilatant and compaction shear bands within granular materials
    • Danuta Leśniewska
    • M. Pietrzak
    • Andrzej Tejchman-Konarzewski
    2014

    W artykule omówiono wyniki doświadczalne w odniesieniu do rozwoju stref ścinania w materiałach granulowanych. Wyniki stref ścinania otrzymano stosując metodę foto-sprężystą oraz technikę korelacji cyfrowych obrazów DIC. Pokazano zalety i wady obu metod to wykrywania stref scinania.

  • Photolytic and Photocatalytic Recreational Water Treatment
    • Andreas Haenel
    • Aleksandra Małachowska
    • Aleksandra Korkosz
    • Jan Hupka
    2014

    Disinfection is one of the most important steps during recreational water treatment. Nevertheless, disinfection by-products are formed by conventional disinfectants, which pose several health threats. The concentration of disinfection by-products can be decreased by photolytic and photocatalytic treatment. Medium-pressure mercury lamp, UV-LEDs and solar irradiation were investigated and evaluated considering emitted wavelength, light intensity and operational costs. It was found that medium-pressure mercury lamps are superior for photolytic and photocatalytic recreational water treatment.

  • Phototransformation of Amlodipine: Degradation Kinetics and Identification of Its Photoproducts
    • Anna Jakimska-Nagórska
    • Magdalena Śliwka-Kaszyńska
    • Piotr Nagórski
    • Jacek Namieśnik
    • Agata Kot-Wasik
    2014 Full text PLOS ONE

    Nowadays, monitoring focuses on the primary compounds and does not include degradation products formed during various biological and chemical processes. Transformation products may have the same effects to human health and the environment or sometimes they can be more toxic than the parent compound. Unfortunately, knowledge about the formation of degradation products is still limited, however, can be very important for the environmental risk assessment. Firstly, the photodegradation kinetic of amlodipine was investigated in two experimental conditions: during the exposure to solar radiation and during the exposure to the light emitted by the xenon lamp. In all cases degradation of amlodipine followed a pseudo-first-order kinetics. In the next step, identification of transformation products of amlodipine formed during the exposure to xenon lamp irradiation was performed using ultra high performance liquid chromatography quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS). As a result sixteen photoproducts were identified, their structures were elucidated and ultimately the transformation pathway was proposed. Fifteen compounds (out of 16 photoproducts) were newly identified and reported here for the first time; some of those compounds were formed from the first photoproduct, amlodipine pyridine derivative. Several analytes were formed only in acidic or basic conditions. Furthermore, the occurrence of amlodipine and its identified degradation products was investigated in environmental waters. Only one out of 16 compounds was found in wastewater effluent. The possibility of the sorption of examined analytes to sewage sludge particles was discussed based on QSAR.

  • Photovoltaic-Installation Performance in Central Europe on the Example of Poland
    • Ewa Klugmann-Radziemska
    2014 Full text Journal of Solar Energy Research Updates

    The amount of the electric energy obtained from a photovoltaic (PV) installation depends on the energy of the radiation. Weather conditions differ strongly between various years even in the same season. Depending on the climatic conditions of a given location, fixed PV solar plants as well as one-axis and dual-axis tracking PV solar plants are being installed worldwide. The aim of this work is to analyse the sunlight intensity and PV system performance under the geographic conditions of central Europe. The analysis was made on the basis of multi-month monitoring in Gdańsk, Poland, and by comparison with systems in other locations on the basis of the results of researchat Opole University, West Pomeranian University of Technology, Szczecin, Poznan University of Technology, and AGH University of Science and Technology.The annual irradiation and the electrical PV energy production have been averaged over a time period of several years. Two aspects are explored within this paper: the expected average annual electricity generation of a standard 1-kWp standalone or grid-connected PV system and the theoretical potential of PV electricity generation in the European countries.

  • Physical and Thermophysical Properties of 1-Hexyl-1,4-diaza[2.2.2]bicyclooctanium Bis(trifluoromethylsulfonyl)imide Ionic Liquid
    • Łukasz Marcinkowski
    • Adam Kloskowski
    • Jacek Namieśnik
    2014 JOURNAL OF CHEMICAL AND ENGINEERING DATA

    Owing to their unique properties, ionic liquids (ILs) have become a real alternative to organic compounds. Nowadays, ILs are commonly used in a number of areas such as chemical synthesis and separation techniques. However, ionic liquids continue to have a limited applicability in industry because the information on their physical and chemical properties is not readily available. This paper presents, for the first time, the results of studies on 1-hexyl-1,4-diaza[2.2.2]bicyclooctanium bis(trifluoromethylsulfonyl)imide ([HDABCO][NTf2]) ionic liquid which is relatively novel and not well researched. A wide range of properties, important from a point of view of potential applications of [HDABCO][NTf2], was examined. Parameters such as density, phase transition temperatures, long-term thermal stability, polarizability, hygroscopicity, and McReynolds constants have been determined.

  • Pionierskie zastosowanie elementów prefabrykowanych w budynkach mieszkalnych w okresie powojennym na terenie Gdyni
    • Maciej Niedostatkiewicz
    2014

    Okres intensywnej odbudowy Gdyni ze zniszczeń wojennych charakteryzował się wprowadzaniem na rynek budowlany w ramach prac eksperymentalnych dużej liczby udoskonaleń technologiczno-montażowych. Celem artykułu jest przedstawienie przykładów pionierskiego zastosowania prefabrykacji elementów konstrukcyjnych budynków mieszkalnych, wprowadzonego w celu usprawnienia i przyspieszenia tempa ich realizacji

  • Places of worship, spiritual healing and urban regeneration
    • Monika Trojanowska
    2014 Urbanistica Informazioni

    Many researchers demonstrated that it is possible to help people achieve mental and physical regeneration with proper architecture, urban and landscape planning. The term therapeutic landscapes could also be applied to places of worship, where people gather for spiritual healing and renewal. Public space that they offer is inclusively open to all. Addition- ally, they serve to reinvigorate the places where they are located. Shrines are accompanied by an array of commercial services, starting from transportation hubs to restaurants and hotels. The role of modern sacred places in urban regeneration will be discussed. An example of a modern place of worship, the shrine of Divine’s Mercy in Cracow Łagiewniki, Poland, will be presented. Located on the outskirts of town, it became a new destination for many pilgrimages after the death of Saint Sister Faustina Kowalska in the XX century.

  • Plan zarządzania obiektem zabytkowym - Muzeum architektury i kultury materialnej we Lwowie (Ukraina)
    • Romana Cielątkowska
    • Piotr Lorens
    • Dorota Wojtowicz-Jankowska
    2014

    Celem Planu Zarządzania Obiektem Światowego Dziedzictwa jest spojrzenie na obiekt w szerszym kontekście zarówno terytorialnym jak i interdyscyplinarnym. Ma posłużyć to do uaktywnienia zróżnicowanych grup społecznych odpowiedzialnych za ochronę, zarządzanie, popularyzowanie obiektu. Stanowi również podstawę do dystrybucji i pozyskiwania środków finansowych.

  • Plan zarządzania zespołem Muzeum architektury ludowej i kultury materialnej we Lwowie - Ukraina
    • Piotr Lorens
    • Romana Cielątkowska
    • Dorota Wojtowicz-Jankowska
    2014

    Opracowanie stanowi publiacje dokumentu Planu Zarządzania Obiektem Muzeum we Lwowie. Dokument stanowi podsumowanie serii warsztatów mających miejsce w lutym 2014r. Jednocześnie dokument stanowi przykład Planu Zarządzania Obiektem Zabytkowym opracowanego zgodnie z zaleceniami ICOMOS.

  • Planning and Management of Large Scale Urban Development Projects
    • Łukasz Pancewicz
    2014

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  • Plate heat exchanger with porous structure for potential use in ORC system
    • Jan Wajs
    • Dariusz Mikielewicz
    • Elżbieta Fornalik-Wajs
    2014

    The experimental analysis of passive heat transfer intensification in the case of plate heat exchanger has been carried out. The passive intensification was obtained by a modification of the heat transfer surface, which was covered by a metallic porous microlayer. The experiment was accomplished in two stages. In the first stage the commercial stainless steel gasketed plate heat exchanger was investigated, while in the second one – the identical heat exchanger but with the modified heat transfer surface. The direct comparison of thermal and flow characteristics between both devices was possible due to the assurance of equivalent conditions during the experiment. Equivalent conditions mean the same volumetric flow rates and the same media temperatures at the inlet of heat exchangers in the corresponding measurement series. Experimental data were collected for the single-phase convective heat transfer in the water-water and water-ethanol configuration. The heat transfer coefficients were determined using the Wilson method.

  • Plate heat exchanger with porous structure for potential use in ORC system
    • Jan Wajs
    • Dariusz Mikielewicz
    • Elżbieta Fornalik-Wajs
    2014 Mechines Technologies Materials

    The experimental analysis of passive heat transfer intensification in the case of plate heat exchanger has been carried out. The passive intensification was obtained by a modification of the heat transfer surface, which was covered by a metallic porous microlayer. The experiment was accomplished in two stages. In the first stage the commercial stainless steel gasketed plate heat exchanger was investigated, while in the second one – the identical heat exchanger but with the modified heat transfer surface. The direct comparison of thermal and flow characteristics between both devices was possible due to the assurance of equivalent conditions during the experiment. Equivalent conditions mean the same volumetric flow rates and the same media temperatures at the inlet of heat exchangers in the corresponding measurement series. Experimental data were collected for the single-phase convective heat transfer in the water-water and water-ethanol configuration. The heat transfer coefficients were determined using the Wilson method.