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Search results for: METHANE YIELD
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Determination of flavanols by liquid chromatography with fluorescence detection. Application to the characterization of cranberry-based pharmaceuticals through profiling and fingerprinting approaches
PublicationIn this work, a new method based on reversed-phase high-performance liquid chromatography (HPLC) with fluorescence detection (FLD) was established for the determination of catechins and related oligomeric proanthocyanidins (PACs) in cranberry-based pharmaceuticals. Compounds were recovered by liquid extraction using methanol/water/hydrochloric acid (60:39:1, v:v:v) as the extraction solvent. The chromatographic separation was carried...
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Biowodór, „paliwo przyszłości”, dotychczasowe metody otrzymywania , porównanie metod otrzymywania
PublicationWodór jest ważnym pierwiastkiem w przemyśle chemicznym. Biowodór wydaje się być użytecznym odnawialnym nośnikiem energii, który mógłby zastąpić paliwa kopalne. Największym problemem wodoru jest jego rzadkie występowanie w czystej formie molekularnej H 2 . Dlatego otrzymanie biowodoru w objętościach opłacalnych ja ko surowiec czy biopaliwo wiedzie przez bioodpady „przesycone” wodorem. Każdy związek...
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TOTAL CROSS SECTION MEASUREMENTS FOR ELECTRON SCATTERING ON METHYL FORMATE (HCOOCH3) MOLECULE: METHYLATION EFFECT
PublicationWe present the absolute total cross section (TCS) for electron scattering from the methyl formate (HCOOCH3) molecule measured in the 10-300 eV energy range, with electrostatic electron spectrometer working in the linear transmission mode. Comparison of TCS for the HCOOCH3 molecule with that measured earlier for the formic acid (HCOOH) compound manifests the methylation effect i.e. the response of the electron scattering dynamics...
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Workshop on Graph Theory
EventsThe Gdańsk Workshop on Graph Theory (GWGT) is an annual, informal workshop whose goal is to provide a forum for scientists to meet, present their work, interact, and establish collaborations in the field of Graph Theory
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Projektowanie farm wiatrowych (Design of Wind Farms), W, Oceanotechnika, II stop., sem.02, zimowy 22/23 (PG_00057174)
e-Learning CoursesThis course is on the Design of Wind Farms and is prepared for students of the MSc program in the field of Ocean Engineering.
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The Influence of Co-Fermentation of Agri-Food Waste with Primary Sludge on Biogas Production and Composition of the Liquid Fraction of Digestate
PublicationEnergy self-sufficiency is a current trend in wastewater treatment plants. This effect can be achieved by increasing the production of electricity from biogas and by reducing energy consumption for technological processes. One idea, in line with the circular economy concept, is the use of waste rich in organic matter as co-substrates for the fermentation process. The aim of this study was to determine the effect of waste co-fermentation...
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Investigation of the 0.4C-35Cr-45Ni-Nb Alloy after Service in High-Temperature Steam and Hydrocarbons Environment
PublicationThe paper presents the results of investigation of the 0.4C-35Cr-45Ni-Nb alloy, which operated in the cracked hydrocarbon feeds and dilution steam at 1125 C. The material originated from the pyrolytic furnace coil tubes, of which internal walls were in contact with the aforementioned medium, whereas the external walls were in contact with the flue gases. The examination included metallographic and mechanical tests on the material...
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Number of selected entities (companies) of the national economy in 2008 - 2017
Open Research DataCurrently, most enterprises in Poland are run as sole proprietorships. In addition, natural persons running a business may run an enterprise as part of civil partnerships, which are a relatively simple form of business operation by more than one person (at least two partners). In addition, there is a growing interest in establishing commercial law companies,...
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Hydrological responses to large-scale changes in land cover of river watershed: Review
PublicationDespite many studies on the hydrological responses to forest cover changes in micro and mesoscale watersheds, the hydrological responses to forest cover alterations and associated mechanisms through the large spatial scale of the river watershed have not been comprehensively perceived. This paper thus reviews a wide range of available scientific evidence concerning the impacts exerted by the forest removal on precipitation, water...
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Processing, physico-mechanical and thermal properties of reclaimed GTR and NBR/reclaimed GTR blends as function of various additives
PublicationIn this work, ground tire rubber (GTR) was mechano-chemically reclaimed in the presence of bitumen and various additives. During studies three types of processing and curing additives: (i) peptizer P300; (ii) vulcanization accelerator tetramethylthiuram disulfide (TMTD) and (iii) organic peroxide di(2-tert-butyl-peroxyisopropyl)benzene (BIB1) were applied to enhance reclaiming of GTR. Reclaiming process was evaluated by oscillating...
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Magnetic properties of selected transition metal solid-state compounds.
ProjectsProject realized in Department of Solid State Physics according to UMO-2019/35/D/ST5/03769 agreement from 2020-06-10
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Robert Burczyk mgr inż.
PeopleRobert Burczyk received Eng. degree and M. SC. Eng. degree in electronics and telecommunictions engineering in 2017 and 2018 successively with specialization in radiocommunication systems and networks. The subject of the dissertations was focused on Wireless Body Area Network (WBAN). Currently, he is a PhD student and an employee at the Department of Radiocommunication Systems and Networks, Gdansk University of Technology. His...
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Separation of CO2 from biogas using absorption columns
PublicationBiogaz zawiera ok. 50-70% metanu, 30-40% di tlenku węgla oraz niewielkie ilości innych związków jak siarkowodór czy amoniaku. Dla uzyskania wysokokalorycznego gazu konieczne jest usunięcie ze strumienia di tlenku węgla. Praca opisuje potencjał użycia do tego celu kolumn absorpcyjnych oraz cieczy jonowych jako absorbenta
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Eter dimetylowy - paliwo przyszłości
PublicationEter dimetylowy /DME/ jest uznawany za przyjazne środowisku paliwo przyszłości, ważny związek do magazynowania i dystrybucji energii, a także podstawowy substrat w technologii chemicznej. Produkuje się go z gazu syntezowego /który można otrzymać z węgla kamiennego/, gazu ziemnego, metanu z innych źródeł, koksu naftowego, biomasy, odpadów komunalnych.
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Naprężeniowe pękanie korozyjne złączy spawanych nowego stopu Al-Mg ALUSTAR
PublicationWykonano pomiary wytrzymałości na rozciąganie, wydłużenia, czasu do zniszczenia, przewężenia i energii zniszczenia stopu rozciąganego z małą szybkością w powietrzu i 3,5 roztworze NaCl. Oceniono podatność złączy spawanych na korozję naprężeniową oraz możliwość zastosowania stopu ALUSTAR w budowie jednostek pływających.
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Wytwarzanie blach bimetalowych al 99,98 -m1e wstępnie łączonych metodą zgrzewania wybuchowego
PublicationW artykule omówiono proces wytwarzania blach bimetalowych AL99,8-M1E obejmujący etap łączenia warstw stanowiących wsad bimetalowy oraz etap związany z ich plastycznym kształtowaniem poprzez walcowanie. Przedstawiono i omówiono wpływ parametrów procesu walcowania na nierównomierność odkształcenia warstw stanowiących bimetal.
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Czynniki generujące skuteczne zarządzanie
PublicationW niniejszym artykule zarezentowano wybrane aspekty, które należy wziąć pod uwagę w przypadku zarządzania pracownikami w celu doskonalenia tego obszaru zarówno z punktu widzenia pracownika, jak i pracodawcy
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Orientacja na klienta. Fundamentalna zasada doskonalenia jakości
PublicationW niniejszym artykule zaprezentowano podstawowe aspekty doskonalenia jakości w odniesieniu do kluczowej zasady doskonałości jaką jest orientacja na klienta. Autor odniósł się do takich aspektów jak przewidywanie potrzeb, identyfikacja i zrozumienie oczekiwań, dostosowanie oferty do potrzeb klienta oraz pomiar satysfakcji.
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Zaangażowanie i rozwój pracowników każdego szczebla. Kolejna z fundamentalnych zasad doskonalenia jakości
PublicationW niniejszym oracowaniu poddano analizie zaangażowwanie i rozwój pracowników jako podstawę funcjonowania podmiotów dążących do zwiększenia swojej dojrzałości projakościowej. Autor wskazał odniesienia do tego obszaru w teorii Kompleksowego Zarządzania Jakością wraz z podstawowymi uwarunkowaniami zaangażowania proacowników.
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Docierarki do płaszczyzn. Cz. II. Docierarki dwutarczowe.
PublicationPrzedstawiono wsółczesne konstrukcje docierarek dwutarczowych do obróbki powierzchni płasko-równoległych. Omówiono kinematykę obiegowego układu wykonawczego obrabiarek dwutarczowych oraz tendencje rozwoju ich konstrukcji.
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Docierarki do płaszczyzn. Cz.I. Docierarki jednotarczowe
PublicationPrzedstawiono konstrukcje współcześnie produkowanych docierarek jednotarczowych do płaszczyzn. Omówiono standardową kinematykę układu wykonawczego tego typu docierarek.
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Szlifowanie na docierarkach tarczowych
PublicationPrzedstawiono technologie szlifowania powierzchni płaskich na docierarkach tarczowych. Omówiono stosowane narzędzia segmentowe, obrabiarki dwutarczowe i zalety mikroszlifowania. Porównano proces docierania konwencjonalnego luźnym ścierniwem z mikroszlifowaniem z kinematyką docierania.
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Sidrish Zahra
PeopleSidrish Zahra received her B.Sc. degree in Electrical (Telecommunication) Engineering from school of Electrical Engineering, Government College University Faisalabad (GCUF), Pakistan in 2016.Then, she received the M.S. degree in School of Information and Communication Engineering, University of Electronic Science & Technology of China (UESTC) in 2019. Now, She is pursuing her Ph.D. degree in Control, Electrical and Electronics...
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Joanna Raczek dr inż.
PeopleEmployment 2003 -- 2019: Faculty of Applied Physics and Mathematics, Gdańsk University of Technology. 2019 - present: Faculty of Electronic, Informatics and Telecominications, Gdańsk University of Technology. Education May 2007: Doctor of Philosophy in Mathematics, University of Gdańsk. Doctoral dissertation: "Paired domination and doubly domination in graphs". Supervisor: dr hab. Jerzy Topp. 2000 -- 2004 Bachelor of Science...
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<i>N,N,N</i>-Trimethyl-N-(methyl 5-deoxy-2,3-<i>O</i>-isopropylidene-β-D-ribofuranosid-5- yl)ammonium 4-methylbenzenesulfonate sesquihydrate.
PublicationThe structure of the title compound, [C12H24NO4][C7H7O3S]·1.5H2O, contains alternating layers parallel to (001) of hydrophobic and polar character, stabilized by C-H...O hydrogen bonding. The furan ring adopts an envelope conformation with the C(OMe) atom as the flap, and the dioxolane ring is twisted about one of the O-C(methine) bonds. A comparison to related compounds is presented. The tosylate-O atoms were disordered over two...
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Nondestructive Optical Sensing of Flavonols and Chlorophyll in White Head Cabbage ( Brassica oleracea L. var. capitata subvar. alba ) Grown under Different Nitrogen Regimens
PublicationA multiparametric optical sensor was used to nondestructively estimate phytochemical compounds in white cabbage leaves directly in the field. An experimental site of 1980 white cabbages (Brassica oleracea L. var. capitata subvar. alba), under different nitrogen (N) treatments, was mapped by measuring leaf transmittance and chlorophyll fluorescence screening in one leaf/cabbage head. The provided indices of flavonols (FLAV) and...
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Copper and copper-manganese 1D coordination polymers: Synthesis optimization, crystal structure and preliminary studies as catalysts for Baylis–Hillman reactions
PublicationThis work reports the influence of experimental parameters (pH and counter-ion) in the synthesis of the 1D coordination polymer [Cu(IDA)(H2O)2]n (IDA = iminodiacetate), named here Cu-IDA. Copper-manganese bimetallic coordination polymers were also obtained by isomorphic replacement into Cu-IDA structure, with different molar ratio of Cu2+ and Mn2+ ions, denoted here as Cu/Mn-IDA (0.9/0.1; 0.7/0.3 and 0.5/0.5). New coordination...
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Boron-Doped Diamond/GaN Heterojunction—The Influence of the Low-Temperature Deposition
PublicationWe report a method of growing a boron-doped diamond film by plasma-assisted chemical vapour deposition utilizing a pre-treatment of GaN substrate to give a high density of nucleation. CVD diamond was deposited on GaN substrate grown epitaxially via the molecular-beam epitaxy process. To obtain a continuous diamond film with the presence of well-developed grains, the GaN substrates are exposed to hydrogen plasma prior to deposition....
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Ribosomal intergenic spacer analysis as a tool for monitoring methanogenic archaea changes in an anaerobic digester
PublicationThe applicability of a newly-designed PCR primer pair in examination of methanogenic Archaea in a digester treating plant biomass was evaluated by Ribosmal Intergenic Spacer Analysis (RISA). To find a suitable approach, three variants of RISA were tested: (1) standard, polyacrylamide gel-based, (2) automated, utilized capillary electrophoresis (GA-ARISA), and (3) automated microfluidics-based (MF-ARISA). All three techniques yielded...
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Entrepreneurs' intention to use tax relief
Open Research DataThe dataset presents the results of research conducted by the author among Polish entrepreneurs in 2017–2020. The diagnostic survey method was used to collect primary data among enterprises from the SME sector. The measurement instrument was a survey questionnaire developed by the author. This study is a key piece of research. The aim was to examine...
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Reduction of CO2 Emissions from Offshore Combined Cycle Diesel Engine-Steam Turbine Power Plant Powered by Alternative Fuels
PublicationDiverse forms of environmental pollution arise with the introduction of materials or energy that exert adverse effects on human health, climate patterns, ecosystems, and beyond. Rigorous emission regulations for gases resulting from fuel combustion are being enforced by the European Union and the International Maritime Organization (IMO), directed at maritime sectors to mitigate emissions of SOx, NOx, and CO2. The IMO envisions...
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Distillery Wastes as External Carbon Sources for Denitrification in Municipal Wastewater Treatment Plants
PublicationIn order to improve efficiency of N removal within the existing capacities, the denitrification process can be enhanced by adding external carbon sources. The studies on utilization of various by-products or waste materials as alternative carbon sources for denitrification have been carried out for over 20 years (Sage et al. 2006). Among several commercially available organic compounds (such as methanol, ethanol, acetic acid, glucose),...
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Technical Physics 2024/25
e-Learning CoursesField of study: Data Engineering; Subject: Technical physics; Lecture notes and other course materials.
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Intensification of catechin extraction from the bark of Syzygium cumini using ultrasonication: Optimization, characterization, degradation analysis and kinetic studies
PublicationCatechin is a prominent polyphenolic component that possesses various medicinal properties. Present work communicates the intensification and optimization of catechin extraction from the bark of Syzygium cumini tree using stirred reactor, soxhlet, ultrasonic bath, and ultrasonic horn technique. The optimization of several parameters such as type of solvent, solid to solvent ratio (1:100 w/v), speed of agitation (300 RPM), extraction...
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Arsalan Muhammad Soomar Doctoral Student
PeopleHi, I'm Arsalan Muhammad Soomar, an Electrical Engineer. I received my Master's and Bachelor's Degree in the field of Electrical Engineering from Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan. Currently enrolled as a Doctoral student at the Gdansk University of Technology, Gdansk, Poland. Also worked in Yellowlite. INC, Ohio as a Solar Design Engineer. HEADLINE Currently Enrolled as a Doctoral...
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Equivalent 4-node enhanced assumed strain and hybrid stress shell elements in 6-parameter theory
PublicationWe discuss the equivalence of semi-enhanced assumed strain (EAS) and semi-hybrid stress (SEM) shell finite elements. We use the general nonlinear 6-field shell theory with kinematics composed of generalized displacements composed of the translation field and the rotation field. Due to the presence of rotation tensor the elements have naturally six nodal engineering degrees of freedom. We propose interpolation for a strain field...
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Ocena stanu technicznego kompensatorów wylotowych (pigtaili) rur katalitycznych z reformera 0250-F101
PublicationCelem badań było ustalenie stanu materiału rur kompensatorów wylotowych rur katalitycznych z reformera metanu po eksploatacji. Wykonano badania niszczących odcinków rur, analizę spektralną składu chemicznego, badania metalograficzne mikroskopowe, pomiary twardości i mikrotwardości, statyczne próby rozciągania w temperaturze pokojowej. Dokonano oceny stopnia degradacji materiału rur z orzeczeniem o aktualnym stanie technicznym kompensatorów.
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Influence of β-cyclodextrin on coupling reactions of o-nitrobenzenediazonium salt with pyrrole
PublicationThe influence of -cyclodextrin on o-nitrobenzenediazonium salt coupling with pyrrolehas been studied analyzing the yield and products distribution.
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Distinctive properties of Scots pine (Pinus sylvestris L.) originating from the Carpathian and Great Poland-Pomeranian of Nature and Forest Land
PublicationIn this paper values of properties of Scots pine, the fracture toughness and of shear yield stress in the shear zone are presented. Samples of Scotch pine (Pinus sylvestris L.) wood of two provenances from Poland were tested. These properties were determined from the values of cutting power obtained experimentally on the saw frame PRW-15M. The values of fracture toughness and shear yield stress based on the Atkins model for cutting...
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Technical physics (Data Engineering)
e-Learning CoursesField of study: Data Engineering; Subject name: Technical physics; Lecture notes and other course materials.
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Technical physics (Data Engineering)_22/23
e-Learning CoursesField of study: Data Engineering; Subject name: Technical physics; Lecture notes and other course materials.
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Technical physics (Data Engineering)_23/24
e-Learning CoursesField of study: Data Engineering; Subject name: Technical physics; Lecture notes and other course materials.
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SAWING PROCESS AS A NEW ALTERNATIVE WAY OF DETERMINING SOME WOOD PROPERTIES
PublicationCutting forces (power) could be considered from a point of view of modern fracture mechanics. The developed cutting model, derived from fracture mechanics, includes work of separation (fracture toughness) in addition to plasticity and friction, and also dullness of the cutting edge described by the cutting edge radius. Moreover, forecasting of the shear plane angle for the cutting models, broaden possibilities of energetic effects...
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Wykorzystanie taksonomii do integracji danych w zasobach Internetu
PublicationRozproszony zbiór danych internetowych można zintegrować i efektywnie zorganizować wykorzystując możliwości usług sieciowych i taksonomii. W artykule przedstawiono wyniki pomiarów nakładu pracy niezbędnej do budowy usług sieciowych publikujących zorganizowane zbiory danych. Omówiono zasady ręcznej i automatycznej budowy taksonomii. Przeanalizowano problemy optymalizacji takiej struktury oraz korzyści z kolorowania nazw wyróżnionych...
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Ekologiczne zastosowanie oczyszczalni hydrofitowych w gospodarce wodno-ściekowej
PublicationCelem niniejszej pracy jest przedstawienie dotychczasowych doświadczeń związanych z oczyszczaniem ścieków bytowych oraz unieszkodliwianiem osadów ściekowych w obiektach hydrofitowych. Dodatkowo na przykładzie oczyszczalni odcieków powstających na składowiskach odpadów wykazano, że pomimo naturalnego przebiegu procesów mogą być stosowane do ich oczyszczania, pomimo obecności substancji toksycznych takich jak np. metale ciężkie,...
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Model of ship's magnetic signature
PublicationShips made of ferromagnetic metals interfere with Earth's magnetic field in their surrounding. The disturbance of the magnetic field makes possible localization and even identification of the ship, which could determine a threat to the ship. The measurement of the magnetic field around the ship enables to determine its magnetic signature. The paper presents a multidipoles model of the ship magnetic field, which allows to determine...
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An Improved Synthesis of Trisodium (R)-Homocitrate from Citric Acid
PublicationA method of synthesis of trisodium (R)-homocitrate starting from citric acid is reported. The procedure affords the final product of high optical purity with satisfactory yield.
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Characterization of glucoamylase immobilized on magnetic nanoparticles
PublicationMagnetic support was prepared by precipitation from an alkaline solution of divalent and trivalent iron ions and subsequently was modified with 3-aminopropyltriethoxysilane. FTIR analysis showed existence of a new Si-O-Fe bond in obtained particles. Scanning electronic microscopy images shows that the nanoparticles of all samples have particle size below 30 nm. Glucoamylase AMG 300L was immobilized onto the modified magnetic support...
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Key issues in modeling and optimization of lignocellulosic biomass fermentative conversion to gaseous biofuels
PublicationThe industrial-scale production of lignocellulosic-based biofuels from biomass is expected to benefit society and the environment. The main pathways of residues processing include advanced hydrolysis and fermentation, pyrolysis, gasification, chemical synthesis and biological processes. The products of such treatment are second generation biofuels. The degree of fermentation of organic substances depends primarily on their composition...
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Accelerated multi-objective design optimization of antennas by surrogate modeling and domain segmentation
PublicationMulti-objective optimization yields indispensable information about the best possible design trade-offs of an antenna structure, yet it is challenging if full-wave electromagnetic (EM) analysis is utilized for performance evaluation. The latter is a necessity for majority of contemporary antennas as it is the only way of achieving acceptable modeling accuracy. In this paper, a procedure for accelerated multi-objective design of...