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Analiza wpływu produktów biodegradacji polikaprolaktonu modyfikowanego skrobią na populację cyjanobakterii
PublicationBiodegradacja, jako jedna z najnowszych metod remediacji środowiska naturalnego, znalazła swoje zastosowanie również w przypadku tworzyw sztucznych. Na rynku pojawiły się nowe polimery de-gradowalne ulegające destrukcji na drodze procesów biologicznych. Tradycyjne polimerowe opako-wania, stwarzające problem z utylizacją, są wypierane przez opakowania biodegradowalne (m.in. z Mater-Bi, PLA czy PCL), przeznaczone głównie do kompostowania....
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ASCORBIC ACID IN POLYURETHANE SYSTEMS FOR TISSUE ENGINEERING
PublicationThe introduction of the paper was devoted to the main items of tissue engineering (TE) and the way of porous structure obtaining as scaffolds. Furthermore, the significant role of the scaffold design in TE was described. It was shown, that properly designed polyurethanes (PURs) find application in TE due to the proper physicochemical, mechanical and biological properties. Then the use of L-ascorbic acid (L-AA) in PUR systems for...
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Wpływ rodzaju czynnika antyporostowego na skuteczność powłoki przeciwporostowej
PublicationW niniejszej pracy przedstawiono wyniki badań dotyczące wpływu biocydu organicznego pirytionu cynku(sól cynkowa 2-tiono-1-hydroksy pirydyny) oraz biocydu nieorganicznego (tlenku miedzi I) na właściwości przeciwporostowe farb akrylowych. Przeprowadzono badania mikroskopowe powierzczni farb przed jak i po 6-cio miesięcznej ekspozycji w wodzie morskiej. Analiza obrazów pozwala stwierdzić, iż zastosowanie biocydu organicznego bądź...
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Poliestrouretany modyfikowane poli(alkoholem winylowym)
PublicationW niniejszej pracy przedstawiono wyniki badań dotyczące syntezy i właściwości poliestrouretanów modyfikowanych poli(alkoholem winylowym). Prepolimery uretanowe zsyntezowano z poli(kaprolaktono)diolu o ciężarze cząsteczkowym 2000 i 1,6-diizocyjanianu heksametylenu, w kolejnym etapie prepolimer przedłużano 1,4-butanodiolem bądź modyfikowano poli(alkoholem winylowym). Analiza wyników przeprowadzonych badań twardości, wytrzymałości...
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The influence of amorphous macrodiol, diisocyanate type and l-ascorbic acid modifier on chemical structure, morphology and degradation behavior of polyurethanes for tissue scaffolds fabrication
PublicationStudies described in this work were related to the bulk synthesis and characterization of polyurethanes (PURs) obtained with the use of cyclic 4,4′-methylene bis(cyclohexyl isocyanate) (HMDI) or linear 1,6-hexamethylene diisocyanate (HDI), amorphous α,ω-dihydroxy(ethylene-butylene adipate) macrodiol (PEBA), 1,4-butandiol (BDO) chain extender and dibutyltin dilaurate (DBTDL) catalyst. Obtained PURs were modified with l-ascorbic...
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Biodegradation of modified poly(î-caprolactone) in different environments
PublicationPorównano odporność na biodegradację różnych filmów poliepsilon kaprolaktonu w wodzie morskiej z Bałtyku, w roztworze soli, w wodzie morskiej z azydkiem sodu oraz w kompoście z osadem czynnym. Oceniano zmiany ubytku wagi, lepkość właściwości wytrzymałościowe, stopień krystaliczności i morfologię przed i po procesie degradacji. Filmy z dodatkiem środków antypoślizgowych, degradowane w środowiskach naturalnych ulegały rozkładowi...
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Morphology of polyurethanes revisited by complementary AFM and TEM
PublicationPrzedmiotem badań mikroskopowych TEM i AFM były lane segmentowe poliuretany o zawartości 30 i 50% segmentu sztywnego. Stwierdzono obecność sferolitów (poziom mikrometrów), fibryl i globul. Ponadto zastosowanie AFM pozwoliło na zbadanie nanomorfologii badanych poliuretanów. Zaobserwowano krótkie, cylindropodobne domeny segmentów sztywnych rozproszone w matrycy segmentów giętkich.
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Raman microscopy in the studies of microphase-separated polyurethanes.
PublicationPorównano możliwości badawcze różnych odmian spektroskopowych do analizy po-limerów. Podano przykłądy wykorzystania połączonych technik mikroskopowych ispektroskopowych do badania polimerów wielofazowych. Na tej podstawie wyka-zano zasadność zastosowania po raz pierwszy mikroskopii Ramana w badaniachwielofazowych poliuretanów. Wykazano różnice składu chemicznego poszczegól-nych elementów mikromorfologii wielofazowych, segmentowych...
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Polystyrene/polybutadiene blends: an analysis of the phase inversion regionand cophase continuity and a comparison with theoretical predictions.
PublicationMieszaniny przygotowano przez mieszanie w stopie. Występowanie jednego lubobu polimerów w postaci fazy ciągłej stwierdzano przez badanie morfologii przy pomocy skaningowego mikroskopu elektronowego i przez rozpuszczanie jednego ze składników mieszaniny. Badania morfologii mieszanin wykazały, że polistyren występował w postaci globul przy jego zawartości do 30%. Przy zawartości od 40% do 60% obserwowano fazy ciągłe obu...
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TEM and AFM studies of segmented polyester polyurethanes obtained by quasi-prepolymer method.
PublicationPrzedmiotem badań były poliestrouretany o zawartości 50% segmentów sztywnych i zmiennym stosunku NCO/OH. Wykazano, że poliestrouretany otrzymane metodą quasi-prepolimerową wykazują inną morfologię niż otrzymane za pomocą metody prepolimerowej. W poliuretanach quasi- prepolimerowych obserwowano za pomocą mikroskopu AFM agregację segmentów sztywnych o wymiarze poprzecznym rzędu200nm. Segmenty te tworzyły fazę ciągłą. Kruche...
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Degradibility in vitro of polyurethanes based on synthetic atactic poly[)R,S)-3-hydroxybutyrate
PublicationThe aim of the paper was to determine the degradibility of aliphatic polyurethanes in hydrolytic and oxidative solutions. DSC, GPC, density, polymer surface morphology were studied.
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Environmemtal Degradation of Ramie Fibre Reinforced Biocomposites
PublicationThe estimation of environmental degradibility of different fibre reinforced biocomposites in Baltic sea and in compost with activated sludge under natural conditions is the subject of this paper. Two types of biocomposites, ramie fibre/ecoflex and ramie fibre/cellulose nanofibre reinforced corn starch resin, were studied.It was demonstrated that the biocomposites with natural fibre of ramie were degraded in compost faster than...
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Comparison of disk and tube methods for estimation of biostatic properties of polyurethanes based on synthetic poly[(R,S)-3-hydroxybutyrate
PublicationThe influence of novel aliphatic polyurethanes on growth of Staphyloccocus aureus (SA)in the around of polymer samples has been estimated by disk method. It was staed that the growth of SA was inhibited.The influence of polyurethanes on planctonic Staphyloccocus aureus was also pefrormed by tube method. In this test the slight decrease of bacteria concentration was noticed.
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Preliminary in vivo studies of a new lecitin-based formulation of paclitaxel
PublicationPrzeprowadzono wstępne badania in vivo of PTX opartego na lecytynie. Roztwór jest stabilny przez 24 godziny. Po podaniu królikom dawki 0,66mg/kg/h nie zanotowano zmian morfologicznych krwi w porównaniu do komercyjnego produktu Taxol.
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Determination of Local Dye Concentration in Hybrid Porous Silica Thin Films
PublicationThe idea of determination of local dye concentration in a nanoporous matrix is proposed based on donor − acceptor energy transfer. The method was tested for a Rhodamine 110 − Rhodamine 101 system in silica and methylated silica nanolayers. Evaluation of acceptor (Rhodamine 101) local concentration was carried out by comparing the results of Monte Carlo simulation of energy transfer from donor (Rhodamine 110) to acceptor (Rhodamine...
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Formation of CN (B2∑+) radicals in the vacuum-ultraviolet photodissociation of pyridine and pyrimidine molecules
PublicationFormation of the excited CN(B2∑+) free radicals in the photodissociation of pyridine (C5H5N) and pyrimidine (C4H4N2) molecules was investigated over the energy ranges 16–27 and 14.7–25 eV, respectively. Photon-induced fluorescence spectroscopy was applied to detect the vibrationally and rotationally excited CN radicals by recording the B2∑+→X2∑+ emission bands (violet system). The measured dissociation yield curves demonstrate...
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Hydrogen migration in formation of NH(A3Π) radicals via superexcited states in photodissociation of isoxazole molecules
PublicationFormation of the excited NH(A 3Π) free radicals in the photodissociation of isoxazole (C3H3NO) molecules has been studied over the 14-22 eV energy range using photon-induced fluorescence spectroscopy. The NH(A 3Π) is produced through excitation of the isoxazole molecules into higher-lying superexcited states. Observation of the NH radical, which is not a structural unit of the isoxazole molecule, corroborates the hydrogen atom...
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Spatially variant PSF modeling in confocal macroscopy
PublicationThe point spread function (PSF) of imaging systems plays an essential role in image reconstruction. In the context of confocal microscopy, optical performance degrades towards the edge of the field of view. In confocal macroscopy, the related artifacts are even stronger, as the field of view is much larger. Because the related PSFs are strongly spatially variant, it is essential to be able to model them with few parameters. The...
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Elemental composition of deposited sediments at the tram-route junction
Open Research DataThis data set contains the elemental composition results of deposited sediments collected at the tram-route junction in Gdańsk. Sample collection began in July 2022, when the tram lines were completed and before the rails were scrubbed (27/07/2022). The second sample round was carried out following rail scrubbing in October 2022 (7/10/2022). Since February...
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Badania spękań niskotemperaturowych podbudów a AC WMS na nowobudowanej autostradzie A1 w Polsce. Część 1 - Badania terenowe i laboratoryjne
PublicationW artykule przedstawiono problem niskotemperaturowych spękań poprzecznych, które powstały na podbudowach z betonu asfaltowego o wysokim module sztywności AC WMS. Liczne spękania niskotemperaturowe powstały na analizowanych podbudowach AC WMS podczas okresu zimowego w 2012 r. zanim została zakończona cała konstrukcja nawierzchni. Spękania powstały zarówno na połączeniach technologicznych, jak i pomiędzy nimi. Problem taki nie wystąpił...
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Nutritional and Pharmaceutical Properties of Bioactive Compounds in Organic and Conventional Growing Kiwifruit
PublicationThe bioactivity of two kiwifruit’s cultivars growing under organic and conventional conditions were studied and compared. The bioactive compounds were extracted with water and ethanol using similar conditions which are applied in pharmaceutical applications and for daily fruit consumption such as tea drink. Antioxidant radical scavenging assays [ferric-reducing/antioxidant power (FRAP); cupric reducing antioxidant capacity (CUPRAC);...
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024303971]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024308211]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024303291]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024306461]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3300730069429691]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024305201]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024304681]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Lobular carcinoma, pleomorphic - Female, 43 - Tissue image [3140630024309091]
Open Research DataThis is the histopathological image of BREAST tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Topography studies of screen-printed carbon electrodes (SPCE) with boron-doped diamond foils
Open Research DataThis dataset contains topography examination of SPCE containing boron-doped diamond BDD foils done with scanning electron microscope. Different points mark different electrode spots: A) working electrode, B) reference electrode, C) counter electrode, D) pads.
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Elimination and migration of hydrogen in the vacuum-ultraviolet photodissociation of pyridine molecules
PublicationElimination of the excited hydrogen atoms H(n), n = 4–7, and hydrogen migration in formation of the excited NH(A 3Π) free radicals in the photodissociation of pyridine, C5H5N, molecules have been studied over the 17.5–70 eV photon energy range. In the measurements the photon-induced fluorescence spectroscopy technique has been applied. Both fragments are produced through excitation of pyridine molecules into higher-lying superexcited...
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A XAS study of a highly diluted Pt electrocatalyst operating in PEM fuel cells
PublicationWe present an X-ray absorption spectroscopy (XAS) study of a low Pt content catalyst layer(Pt loading 0.1 mg c2) operating at the cathode of a proton exchange membrane fuel cell(PEMFC). This catalyst is based on the use of a mesoporous inorganic matrix as a support forthe catalyst Pt nanoparticles. Due to the high Pt dilution, in situ measurements of itsstructural properties by XAS are challenging and suitable experimental strategies...
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Synergistic Effects of Bitumen Plasticization and Microwave Treatment on Short-Term Devulcanization of Ground Tire Rubber
PublicationGround tire rubber (GTR) was mechano-chemically modified with road bitumen 160/220 and subsequently treated using a microwave radiation. The combined impact of bitumen 160/220 content and microwave treatment on short-term devulcanization of GTR was studied by thermal camera, wavelength dispersive X-ray fluorescence spectrometry (WD-XRF), static headspace, and gas chromatography-mass spectrometry (SHS-GC-MS), thermogravimetric analysis...
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Electrochemical oxidation of ionic liquids at highly boron doped diamond electrodes
PublicationUtlenianie elektrochemiczne przy zastosowaniu elektrod diamentowych wysoko domieszkowanych borem (BDD) było badane pod względem przydatności do utylizacji roztworów zawierających ciecze jonowe (ILs). Dwustronne elektrody Si/BDD przygotowano metodą chemicznego osadzania z fazy lotnej wspomaganego plazmą (MW PE CVD). Badanie przy użyciu skaningowej mikroskopii elektronowej (SEM) potwierdziło, że wytworzone warstwy były ciągłe i miały...
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The impact of QDgreen, QDgreen−β−CD−FA, β−CD, C−2028, β−CD(C−2028), QDgreen−C−2028, and QDgreen−β−CD(C−2028)−FA nanoconjugates on lysosomal content in the cancer (H460, Du-145, LNCaP) and normal (MRC-5, PNT1A) cells
Open Research DataThe impact of QDgreen, QDgreen−β−CD−FA, β−CD, C−2028, β−CD(C−2028), QDgreen−C−2028, and QDgreen−β−CD(C−2028)−FA nanoconjugates on lysosomal content in the cancer (H460, Du-145, LNCaP) and normal (MRC-5, PNT1A) cells was performed by Confocal Laser Scanning Microscopy (63× magnification; ZEISS LSM T-PMT, Magdeburg, Germany). To explore the influence...
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Modele rurociągowych procesów przepływowych
PublicationW rozdziale analizowane jest zagadnienie modelowania oraz parametryzacji procesu przepływu w rurociągach przemysłowych. W pierwszej kolejności przedstawia się bazowy model dyskretny, do którego odnoszone są pozostałe syntezowane rozwiązania. Następnie proponuje się metodę aproksymacji diagonalnej (AMDA), w której stosuje się przybliżenia trójdiagonalnych podmacierzy macierzy rekombinacji za pomocą ich diagonalnych odpowiedników...
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Other noninflammatory disorders of uterus, except cervix - Female, 62 - Tissue image [3220630024672511]
Open Research DataThis is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Other noninflammatory disorders of uterus, except cervix - Female, 62 - Tissue image [3220630024675331]
Open Research DataThis is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Other noninflammatory disorders of uterus, except cervix - Female, 62 - Tissue image [3220630024675251]
Open Research DataThis is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Other noninflammatory disorders of uterus, except cervix - Female, 62 - Tissue image [3220630024679161]
Open Research DataThis is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Other noninflammatory disorders of uterus, except cervix - Female, 62 - Tissue image [3220630024678481]
Open Research DataThis is the histopathological image of CORPUS UTERI tissue sample obtained in Medical University Gdańsk and deposited in ZMDL-GUMED. The sample image was taken using: Pannoramic 250 3DHistech slide scanner (20x magnification) and saved to DICOM format.
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Excitation energy transfer in partly ordered polymer films differing in donor and acceptor transition moments orientation
PublicationBased on spectroscopic measurements selected properties of nonradiative Förster energy transport are studied in uniaxially stretched polyvinyl alcohol thin films for three systems differing in donor and acceptor transition moments orientation relative to the axis of stretching. In particular, donor – acceptor emission anisotropy spectra yield completely different regularities for these systems in uniaxially stretched films, whereas...
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MOBILITY OF SHALE DRILL CUTTINGS CONSTITUENTS
PublicationThis study focuses on the abundance and mobility of metals and trace elements from shale drill cuttings into the water, being the main component of hydraulic fracturing fluid. The relationship between composition of the shale rock and the potential element release during standard water-based leaching tests was characterized by means of X-Ray Fluorescence spectroscopy (XRF). The XRF analysis confirmed the assumption of shales constituents...
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New plasmonic platform for enhanced luminescence of Valrubicin
PublicationLuminescence enhanced by new structure of plasmonic platform with aluminum oxide (Al2O3) buffer layer deposited on gold nanostructures is investigated. Regularly distributed gold nanostructures of average dimension of 50 nm formed the active part of plasmonic platforms. They were manufactured on Corning 1737 glass substrate by melting of gold thin film. The nanostructures were coated by dielectric Al2O3 thin film with thickness...
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Dendron to Central Core S1–S1 and S2–Sn (n>1) Energy Transfers in Artificial Special Pairs Containing Dendrimers with Limited Numbers of Conformations
PublicationTwo dendrimers consisting of a cofacial free-base bisporphyrin held by a biphenylene spacer and functionalized with 4-benzeneoxomethane (5-(4-benzene)tri-10,15,20-(4-n-octylbenzene)zinc(II)porphyrin) using either five or six of the six available meso-positions, have been synthesized and characterized as models for the antenna effect in Photosystems I and II. The presence of the short linkers, -CH2O-, and long C8H17 soluble side...
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Effect of pH on optical sensing with poly-L-lysine-modified nanodiamonds
PublicationNitrogen-vacancy (NV) centers are crystallographic defects which provide diamonds with unique physical properties. The centers are known for their intensive, time-stable fluorescence, and an electron spin, which exhibits long coherence time and may be manipulated using external stimuli. Nanodiamonds containing the NV centers are promising tools in biolabeling, biosensing, and drug delivery due to the aforementioned properties of...
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Unmanned Aircraft Systems Risk Assessment Based on SORA for First Responders and Disaster Management
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Struktura i właściwości mieszanin poliamidu 6 z termoplastycznymi elastomerami poliuretanowymi.
PublicationTermoplastyczne poliuretany (TPU) stanowią grupę elastomerów zdolnych do tworzenia kompatybilnych mieszanin polimerowych z poliamidem 6 (PA6). Obecność wiązań wodorowych może wywierać wpływ nie tylko na tendencję do tworzenia stabilnych układów wielokomponentowych, ale również na ich różnorodne właściwości fizyczne. Wraz ze zwiększającym się udziałem fazy poliuretanowej, zwiększa się udarność mieszanin PA6/TPU badana przy użyciu...
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Polyurethane nanocomposites obtained with organically modified montmorillonites.
PublicationW pracy przedstawiono wyniki badań dotyczące analizy właściwości i struktury nanokompozytu montmorylonit/poliuretan. Przeprowadzono pomiary właściwości mechanicznych i badania strukturalne z wykorzystaniem dyfrakcji promieni rentgenowskich i transmisyjnej mikroskopii elektronowej.
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Properties of PA6/thermoplastic polyurethane and PA6/polyurethane nanocomposite blends
PublicationPrzedstawiono wyniki badań właściwości i struktury mieszanin i nanokompozytów układów PA6/termoplastyczny poliuretan. W przypadku nanokompozytów wprowadzano nanonapełniacz w postaci montmorylonitu. Zbadano właściwości termiczne i wytrzymałościowe oraz omówiono wyniki analiz strukturalnych, otrzymanych z dyfrakcji rentgenowskiej i mikroskopii elektronowej.