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Search results for: materia%C5%82y%20biodegradowalne
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Long-term operating conditions for different sorption materials to capture phosphate from domestic wastewater
PublicationThis paper presents the results of a study on the possibility of applying various configured filters filled with a mixture of Rockfos® and Leca® material for the effective capture of phosphate from domestic wastewater. The tests were carried out for two years at two wastewater flow rates (20 and 40 L/day) in three pairs of filtration columns with a volume of filter material equal to 20 liters each. Columns 1A and 1B were filled...
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Recovery of Valuable Materials and Methods for Their Management When Recycling Thin-Film CdTe Photovoltaic Modules
PublicationDue to the development of new photovoltaic technologies, there is a need to research new recycling methods for these new materials. The recovery of metals from photovoltaic (PV) modules would reduce the consumption of raw materials. Therefore, the development of recycling technologies for used and damaged modules of newer generations is important for environmental reasons. The aim of the research is to shed light on the nature...
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Role of size scale of ZnO nanoparticles and microparticles on toxicity toward bacteria and osteoblast cancer cells
PublicationThe specific role of size scale, surface capping, and aspect ratio of zinc oxide (ZnO) particles on toxicity toward prokaryotic and eukaryotic cells was investigated. ZnO nano and microparticles of controlled size and mor- phology were synthesized by wet chemical methods. Cytotoxicity toward mammalian cells was studied using a human osteoblast cancer cell line and antibacterial activity using Gram-negative bacteria (Escherichia...
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Analytical chemistry in technical approaches: immobilization of biosorbent waste containing heavy metals in cemented materials
PublicationAn ecologically safe and economically justified method of stabilization of the used biosorbents was developed. Sorbent contaminated with heavy metals has been successfully solidified/stabilized using a hydraulic binder. The test results indicated that up to 1% of the biosorbent residue used could be added without compromising the compressive strength of the mortar. The compressive strength of the modified mortars did not change...
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Properties of New Composite Materials Based on Hydroxyapatite Ceramic and Cross-Linked Gelatin for Biomedical Applications
PublicationThe main aim of the research was to develop a new biocompatible and injectable composite with the potential for application as a bone-to-implant bonding material or as a bone substitute. A composite based on hydroxyapatite, gelatin, and two various types of commercially available transglutaminase (TgBDF/TgSNF), as a cross-linking agent, was proposed. To evaluate the impacts of composite content and processing parameters on various...
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Sulfate‐reducing bacteria‐assisted hydrogen‐induced stress cracking of 2205 duplex stainless steels
PublicationThe paper presents the results of a laboratory investigation of the microbiologically assisted hydrogen‐induced stress cracking (HISC) of 2,205 duplex stainless steel (DSS). The testing of susceptibility toward HISC was performed with two different methods. Precharged in sulfate‐reducing bacteria (SRB), inoculated medium samples were subjected to slow strain‐rate testing in artificial seawater. In situ constant load tests were...
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Impact of TiO2 Reduction and Cu Doping on Bacteria Inactivation under Artificial Solar Light Irradiation
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New Insight into the Synthesis and Biological Activity of the Polymeric Materials Consisting of Folic Acid and β‐Cyclodextrin
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Wykorzystanie wyników badań próbek materiału biologicznego do oceny ekspozycji zawodowej i endemicznej
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Problem wyboru bezsmarowego materiału ślizgowego dla łożysk pracujących w warunkach małych oscylacji
PublicationOmówiono przyczyny przyspieszonego zużywania się elementów węzłów łożyskowych, w których zastosowano ekologiczne materiały bezsmarowe. Wykazano szczególny wpływ oscylacji o małej amplitudzie - najczęściej występujących w sposób niezamierzony w pracy łożyska - na zużywanie się materiałów.
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Selective determination of cocaine and its metabolite benzoylecgonine in environmental samples by newly developed sorbent materials
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The Activity of Isoquinoline Alkaloids and Extracts from Chelidonium majus against Pathogenic Bacteria and Candida sp.
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Heavy Metals and Metalloids Leachability from Composite Ground Materials Peat – Fly Ash – Lime
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Critical factors for the performance of chip array-based electrical detection of DNA for analysis of pathogenic bacteria
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Iron and other metal species as phase-composition controllers influencing the photocatalytic activity of TiO2 materials
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Mechanical Strength and Thermal Properties of Cement Concrete Containing Waste Materials as Substitutes for Fine Aggregate
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New Method for Photoactive Cement Preparation—Selected Mechanical Properties and Photocatalytic Activity of New Materials
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Metal doped TiO2 decorated carbon nanostructured materials as an emerging photocatalysts for solar fuels production
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New Filtering Antimicrobial Nonwovens With Various Carriers for Biocides as Respiratory Protective Materials Against Bioaerosol
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Case Study: Fit Evaluation of Protective Gloves Made of Elastic and Non-Elastic Textile Materials
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The Effects of Textural Parameters of Zeolite and Silica Materials on the Protective and Functional Properties of Polymeric Nonwoven Composites
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Experimental study on earthquake-induced pounding between structural elements made of different building materials
PublicationCelem artykułu jest pokazanie wyników dwóch eksperymentów dotyczących zderzeń pomiędzy elementami wykonanymi z różnych materiałów budowlanych, takich jak: stal, beton, drewno i ceramika. Pierwszy z nich polegał na zrzucaniu kul na płaską powierzchnię, drugi dotyczył zderzeń modeli konstrukcji poddanych wymuszeniom sejsmicznym na stole wstrząsowym. Wyniki testów pokazują, iż wpływ materiału elementów kolidujących ze sobą na zachowanie...
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Complexing and Chelating Agents Immobilized on Silica Gel and Related Materials and Their Application for Sorption of Inorganic Species
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A Noded Carbon Emission Tool (NCET) to Measure Embodied Carbon (EC) in Compositional Cementitious Materials
PublicationThe ever evolving modern construction industry is now producing the highest levels of carbon content adversely affecting the construction associated environment. Although, the impact of carbon induced emission is quite large, but still not enough measurable standards and tools to scale these emission are available. This study contributes to the body of knowledge by providing a Grasshopper based definition to calculate the embodied...
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Preparation and characterization of activated carbons obtained from the waste materials impregnated with phosphoric acid(V)
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Effects of strongly aggregated silica nanoparticles on interfacial behaviour of water bound to lactic acid bacteria
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Optimization of Transport Properties of A-Site Ordered LnBa1-xSrxCo2-yFeyO5+ Perovskite-Type Cathode Materials
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Rock salt ordered-type double perovskite anode materials for solid oxide fuel cells
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Rozwój materiałów tytanowych na implanty aloplastyczne = Development of Ti-based materials for alloplastic implants
PublicationThe article is aimed at demonstraiting the previous results and current research work in the area made by Advanced Biomaterials Research Group at the Faculty of Mechanical Engineering. The paper concentrated on the developement of Ti-based biomaterials with improved biocompatibility and bioactivity.
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Synergistic action of extracts from carnivorous plants and synthetic peptides against plant pathoghenic bacteria
Publicationw pracy przedstawiono rezultaty badań nad sprawdzeniem aktywności przeciwbakteryjnej ekstraktów z roślin Drosera capensis i Dionaea muscipula w połączeniu z dwoma syntetycznymi peptydami: CAMEL oraz pexiganan. Najwyższą aktywnością przeciwbakteryjną odznaczał się chloroformowy ekstrakt z D. muscipula z peptydem CAMEL.
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Kompozytowe materiały poliuretanowo-gumowe otrzymywane z lanych elastomerów uretanowych i recyklatów gumowych
PublicationW pracy prezentujemy wyniki badań dotyczących nowej grupy kompozytowych materiałów poliuretanowo-gumowych (KPG), otrzymywanych przy udziale różnej ilości recyklatu gumowego (RG), w których jako osnowę wykorzystano opracowane w Katedrze Technologii Polimerów Politechniki Gdańskiej lane nienasycone poliestrouretany (PEUR), poddawane rodnikowej kopolimeryzacji sieciującej ze styrenem. Zastosowanie PEUR umożliwiło uzyskanie nowej grupy...
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Badania wytrzymałościowe poliwęglanu litego w aspekcie możliwości jego stosowania jako materiału konstrukcyjnego
PublicationPrzedstawiono wyniki badań właściwości mechanicznych poliwęglanu litego pod kątem wykorzystania go dla celów konstrukcyjnych. Próby jednoosiowego rozciągania ze stałą prędkością odkształcenia i próby pełzania przeprowadzono w różnych warunkach temperaturowych, a badania cykliczne dodatkowo wykonano z różnymi prędkościami odkształcenia. Zidentyfikowano podstawowe parametry mechaniczne oraz parametry lepkosprężystego modelu standardowego.
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Badania wpływu twardości materiału obrabianego na temperaturę docieraka podczas docierania powierzchni płaskich
PublicationPrzedstawiono wyniki badań wpływu twardości materiału obrabianego na wzrost temperatury docieraka. Obrabiano elementy ze stali C45 na docierarce jednotarczowej. Porównano obróbkę elementów walcowych o średnicy 17 mm i twardości 160 i 650 HV mikroziarnami węglika krzemu F400/17. W badaniach wykorzystano kamerę termowizyjną.
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Absorption spectroscopy setup for determination of whole human blood and blood–derived materials spectral characteristics
PublicationA dedicated absorption spectroscopy system was set up using tungsten-halogen broadband source, optical fibers, sample holder, and a commercial spectrometer with CCD array. Analysis of noise present in the setup was carried out. Data processing was applied to the absorption spectra to reduce spectral noise, and improve the quality of the spectra and to remove the baseline level. The absorption spectra were measured for whole blood...
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Materiały szklane w lekkiej obudowie. cz. 3. Cechy techniczne i użytkowe szyb
PublicationOmówiono wyroby ze szkła budowlanego i wymagania jekie muszą spełniać zanim zostaną użyte w obiektach budowlanych, szczególnie w zakresie tworzenia szklano-metalowych fasad współczesnych budynków wysokościowych jak i halowych.
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The occurrence of heavy metals and metal-resistant bacteria in water and bottom sediments of the Straszyn reservoir (Poland)
PublicationThe aim of this study is investigate the distribution of selected heavy metals (zinc, copper, lead, cadmium) and metal-resistant bacteria in water and bottom sediments of drinking water reservoir for Gdańsk (Poland). The research area - Straszyn Lake is a dam reservoir on Radunia river, of the total volume of 3 mln m3. Sediment and water sampling took place between May and October 2013 (eight series). Regarding metal concentration...
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Fabrication, structural and electrical properties of Sr(V,Nb)O 3-δ perovskite materials
PublicationThe SrV1-xNbxO3-δ materials with different niobium content in perovskite B-sublattice were prepared by a solid-state reaction process. The microstructure and phase compositions of obtained samples were analyzed by the X-ray diffraction technique (XRD) and scanning electron microscopy (SEM). The electrical conductivity of samples was measured by a DC 4-wire method in range of 100–600 °C in different gas conditions. The oxidation...
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Modeling and MANOVA studies on toxicity and endocrine potential of packaging materials exposed to different extraction schemes
PublicationThe stability of the linings of packaging that is in contact with the goods stored has been of major concern during decades of the development of packaging materials. In this work, an attempt was undertaken to assess the applicability of using two bioassays (Microtox® and XenoScreen YES/YAS) in estimating the stability of packaging (cans, caps, multilayer material) and the impact of their degradation on the toxicity of some simulated media....
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The Influence of the Chemical Composition of Selected Waste Materials from the Production of Copper on the Final Environmental Assessment
PublicationThis article presents qualitative and quantitative analysis of the waste produced by KGHM Polska Miedź. The waste has been analyzed according to its chemical composition and balanced in order to be reused and recycled. Special attention has been paid to mining industries producing the biggest amount of waste and ore enrichment businesses generating waste, which isn’t reused nowadays. Laboratory reseach has been conducted on floatation...
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Culturable bacteria community development in postglacial soils of Ecology Glacier, King George Island, Antarctica
PublicationGlacier forelands are excellent sites in which to study microbial succession because conditions change rapidly in the emerging soil. Development of the bacterial community was studied along two transects on lateral moraines of Ecology Glacier, King George Island, by culture-dependent and culture-independent approaches (denaturating gradient gel electrophoresis). Environmental conditions such as cryoturbation and soil composition...
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Analiza pracy i wzmocnienia fundamentów wielkowymiarowych zbiorników na materiały płynne lub sypkie.
PublicationW pracy omówiono przykłady rozwiązania wzmocnienia fundamentów obwodowych potężnych zbiorników na materiały płynne i sypkie.
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Human-associated bacteria and their mobile genetic elements - important minority in wastewater and wastewater impacted ecosystems
PublicationSince human-associated bacteria have been recognized as vectors in two - way gene transmission between the pathogenic and environmental populations, health hazard connected with wastewater discharge requires reevaluation. In this paper the particular attention was given to antimicrobial-resistance of Escherichia coli and enterococci isolated from wastewater and wastewater impacted environments. The obtained results showed that...
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COMPARISON OF THE CONVENTIONAL AND ALTERNATIVE GRANULAR MATERIALS FOR DUAL-MEDIA FILTRATION OF GROUNDWATER: PILOT PLANT TESTING
PublicationNowadays, occurrence of abnormal mineral or organic natural (geogenic) compounds concentrations, in ground and infiltration water, but also quite often in surface waters, is now a common problem encountered in Poland, Europe and many other countries throughout the world. The most concern is usually paid on the removal of iron (Fe) and manganese (Mn) as well as anthropogenic compounds (in particular referring to the organic compounds...
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Certyfikowane materiały odniesienia - niezbędne narzędzie w kontroli i zapewnieniu jakości wyników pomiarów.
PublicationMateriały odniesienia stanowią niezbędny element systemu kontroli i zapewnienia jakości wyników pomiarów. Zapotrzebowanie na informacje analityczne o składzie róznych obiektów materialnych sprawia, że niezbedna jest produkcja coraz szerszego spektrum materiałów.
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Efficient Method for the Concentration Determination of Fmoc Groups Incorporated in the Core-Shell Materials by Fmoc–Glycine
PublicationIn this paper, we described the synthesis procedure of TiO2@SiO2 core-shell modified with 3-(aminopropyl)trimethoxysilane (APTMS). The chemical attachment of Fmoc–glycine (Fmoc–Gly–OH) at the surface of the core-shell structure was performed to determine the amount of active amino groups on the basis of the amount of Fmoc group calculation. We characterized nanostructures using various methods: transmission electron microscope...
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Novel luminescent calixarene-based lanthanide materials: From synthesis and characterization to the selective detection of Fe3+
PublicationCalix[n]arene-based coordination networks are an emerging class of materials with intriguing properties resulted from the presence of the cavity-like structure of the macrocycle and metallic nodes. In this work, four novel luminescent materials based on calix[4]arene-carboxylate and lanthanides (Eu3þ and Tb3þ) were prepared by two synthetic approaches, solvothermal (CDA-Eu-ST) and slow diffusion (CDA-Eu-RT, CDA-Tb-RT, CTA-Tb-complex)...
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Challenges and opportunities related to the use of sewage sludge ash in cement-based building materials – A review
PublicationDue to the increasingly demanding legal regulations, regarding both sewage sludge (SS) and solid residues obtained during its thermal utilization processes, new solutions to limit their negative impact on the environment are sought. One approach that eliminates the risk of sewage sludge ash (SSA) is its use in cement building materials. The article contains a detailed literature review regarding the use of SSA in mortars and concretes,...
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Recent advances on magnetic carbon-related materials in advanced oxidation processes of emerging pollutants degradation
PublicationRecently, carbon-related materials have been proposed to improve the charge separation of the photogenerated carriers in the semiconductor matrices’ and surface properties. Carbon-related materials may act as co-catalysts, enhancing the pollutants adsorption on the surface, improving the charge carriers separation and photocatalyst stability and providing more active centres for photocatalytic reactions. This review summarizes...
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The Physicochemical and Antibacterial Properties of Chitosan-Based Materials Modified with Phenolic Acids Irradiated by UVC Light
PublicationThis paper concerns the physicochemical properties of chitosan/phenolic acid thin films irradiated by ultraviolet radiation with wavelengths between 200 and 290 nm (UVC) light. We investigated the preparation and characterization of thin films based on chitosan (CTS) with tannic (TA), caffeic (CA) and ferulic acid (FA) addition as potential food‐packaging materials. Such materials were then exposed to the UVC light (254 nm) for...
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Towards large-scale application of nanoporous materials in membranes for separation of energy-relevant gas mixtures
PublicationMembranes containing nanoporous materials (such as zeolites, metal–organic materials and 2D materials such as graphene derivatives) may allow more efficient separation of gas mixtures relevant to emerging energy technologies. For example, such membranes could be applied in the separation of gases containing mixtures of carbon dioxide (CO2) and hydrogen (H2). However, these membranes are currently at a relatively low technology...