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Cadmium and lead toxicity and bioaccumulation in Microcystis aeruginosa

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 427-432页

作者： Piotr RZYMSKI Barbara PONIEDZIALEK Przemyslaw NIEDZIELSKI Piotr TABACZEWSKI krzysztof WIKTOROWICZ Department of Biology and Environmental Protection Poznan University of Medical Sciences Poznan 61-848 Poland Faculty of Chemistry Department of Water and Soil Analysis Adam Mickiewicz University Poznan 61-614 Poland

The growth of human population leads to intensification of agriculture and promotes, through eutrophication, development of cyanobacteria. One of the most widespread and bloom-forming species in freshwater is toxic Microcystis aeruginosa （M. aeruginosa）. Combustion of fossil fuels and metallurgical processes are the main sources of heavy metals contamination in surface water including cadmium （Cd） and lead （Pb）. The following study was conducted in order to determine the effect of 1- 20 mg. L-1 of Cd and Pb on photochemistry （using flow cytometry） and growth （based on chlorophyll concentra- tion） ofM. aeruginosa as well as to estimate levels of metal bioaccumulation. We have found that 1-10mg.L-1 of Cd and 1-5 rag. L1 of Pb induced continuous enhancement of chlorophyll fluorescence during 24 h of incubation. No significant degradation of chlorophyll was observed in these samples. At higher concentrations of 20 mg. L-1 of Cd and 10-20 mg.L-1 of Pb chlorophyll level significantly decreased and its fluorescence was quenched. M. aeruginosa demonstrated high capability of Cd and Pb bioaccumulation, proportionally to initial metal concentration. In samples with initial concentration of 20 mg. L-1 of Cd and Pb bioaccumulation of 87.3% and 90.1% was observed, respectively. Our study demonstrates that M. aeruginosa can potentially survive in highly metals polluted environments, be a primary source of toxic metals in the food chain and consequently contribute to enhanced toxicity of heavy metals to living organisms including human.

关键词： Microcystis aeruginosa heavy metals bioac-cumulation chlorophyll flow cytometry

LOS and NLOS identification in real indoor environment using deep learning approach

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Digital Communications and Networks 2024年第5期10卷 1305-1312页

作者： Alicja Olejniczak Olga Blaszkiewicz krzysztof K.Cwalina Piotr Rajchowski Jaroslaw Sadowski Faculty of Electronics Telecommunications and InformaticsGdansk University of Technology

Visibility conditions between antennas,***-of-Sight(LOS) and Non-Line-of-Sight(NLOS) can be crucial in the context of indoor localization,for which detecting the NLOS condition and further correcting constant position estimation errors or allocating resources can reduce the negative influence of multipath propagation on wireless communication and *** this paper a Deep Learning(DL) model to classify LOS/NLOS condition while analyzing two Channel Impulse Response(CIR) parameters:Total Power(TP) [dBm] and First Path Power(FP) [dBm] is *** experiments were conducted using DWM1000 DecaWave radio module based on measurements collected in a real indoor environment and the proposed architecture provides LOS/NLOS identification with an accuracy of more than 100% and 95% in static and dynamic senarios,*** proposed model improves the classification rate by 2-5% compared to other Machine Learning(ML) methods proposed in the literature.

关键词： Deep learning Machine learning LOS NLOS UWB

Luminescence study of europium(III) tris(β-diketonato)/phosphonate complexes in chloroform

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Journal of Rare Earths 2008年第2期26卷 185-191页

作者： Stefan Lis Zbigniew Piskula krzysztof Staninski Sayaka Tamaki Masayuki Inoue Yuko Hasegawa Department of Rare Earths Faculty of Chemistry Adam Mickiewicz University Grunwaldzka 6 Department of Chemistry Faculty of Science Science University of Tokyo

The extraction of Eu（Ⅲ） with β-diketone, HA, and monodentate or bidentate Lewis bases, B, into chloroform and the luminescence properties of the extracted species were studied. Pivaloyltrifluoroacetone, Hpta, and 2-thenoyltfifluoroacetone, Htta, were used as the β-diketones. The Lewis bases, B, were tetraethyl methylene diphosphonate, POPO, which was bidentate, and diethyl benzylphosphonate, PhPO which was monodentate. Based on the extraction data, the stability constants, log β, of the first complexes between tfis（β-diketonato）Eu（Ⅲ） and the phosphonate, EuA3B, were determined to be 6.0 for the POPO complex and 3.40 for the PhPO complex. The Eu（Ⅲ） luminescence intensity in the EuA3POPO was larger than EuA3 where A was either pta or tta at similar concentrations of Eu（Ⅲ）, while that in Eu（pta）3PhPO was stronger than EuA3; however, in Eu（tta）3PhPO, it was weaker than Eu（tta）3. The POPO functions as a sensitizer, and the PhPO functions as a quencher for the tta chelate and as a sensitizer for the pta chelate. From the lifetime and quantum yield, φ, of the Eu（Ⅲ） luminescence in the complexes as well as the observation of the extractability of Eu（Ⅲ） with the Hpta and the phosphonates and of the luminescence spectra of the complexes, it was confirmed that the extraction of Eu（Ⅲ） was remarkably enhanced with a β-diketonate and a strong Lewis base, and also the ternary complex that was formed as the extracted species, showed luminescence enhancement. This phenomenon may be due the formation of a strong bond between the Eu（Ⅲ） and the strong Lewis base leading to more hydrophobicity in the extracted species and also to more effective energy transfer from the Lewis base to the Eu（Ⅲ）. It was not significant whether the donor atoms were N or O.

关键词： tris(β-diketonato)Eu(Ⅲ) extraction luminescence phosphonate ligands rare earths

Navigating Interoperability in Disaster Management:Insights of Current Trends and Challenges in Saudi Arabia

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International Journal of Disaster Risk Science 2023年第6期14卷 873-885页

作者： Zakaria Ahmed Mani Mohammed Ali Salem Sultan Virginia Plummer krzysztof Goniewicz College of Nursing Jazan University45142 JazanSaudi Arabia Healthcare Transformation Model of CareRegional Health Directorate 66255 NajranSaudi Arabia 3 Institute of Health and Care SciencesSahlgrenska AcademyGothenburg University40530 GothenburgSweden Institute of Health and Wellbeing Federation University AustraliaBerwick 3806Australia Department of Security Studies Polish Air Force University08-521 DeblinPoland

In this rapid review,we critically scrutinize the disaster management infrastructure in Saudi Arabia,illuminating pivotal issues of interoperability,global cooperation,established procedures,community readiness,and the integration of cuttingedge *** exploration uncovers a significant convergence with international benchmarks,while pinpointing areas primed for *** recognize that continual commitments to infrastructural progression and technology adoption are ***,we underscore the value of robust community involvement and cross-border collaborations as key factors in bolstering disaster response ***,we spotlight the transformative influence of emerging technologies,such as artificial intelligence and the Internet of Things,in elevating the effectiveness of disaster management *** review champions in all-encompassing approach to disaster management,which entails harnessing innovative technologies,nurturing resilient communities,and promoting comprehensive disaster management strategies,encapsulating planning,preparedness,response,and *** a result of our analysis,we provide actionable recommendations to advance Saudi Arabia's disaster management *** insights are timely and crucial,considering the escalating global focus on disaster response in the face of increasing disaster and humanitarian events.

关键词： Community preparedness Cooperation Disaster management Emergency response Healthcare Interoperability

Urban green resilience: Experience from post-industrial cities in Poland

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Geoscience Frontiers 2023年第4期14卷 160-172页

作者： Tomasz Starczewski krzysztof Rogatka Anita Kukulska-Kozie Tomasz Noszczyk Katarzyna Cegielska Nicolaus Copernicus University Doctoral School of Social Sciences1 Bojarskiego Street87-100 TorunPoland Nicolaus Copernicus University Faculty of Earth Sciences and Spatial ManagementDepartment of Urban and Regional Development Studies1 Lwowska Street87-100 TorunPoland University of Agriculture in Krakow Faculty of Environmental Engineering and Land SurveyingDepartment of Land Management and Landscape Architecture21 Mickiewicza Avenue31-120 KrakowPoland

De-industrialisation triggered economic,spatial and environmental changes in ***,this study identifies whether there has been a reorientation of spatial development in post-industrial cities towards the creation of green *** aim of the study is to analyse and evaluate the transformation of green spaces in 32 major cities in Poland,including 12 post-industrial *** sources were vector land cover data models from the Urban Atlas for 2006 and 2018,administrative boundaries from the National Boundary Register and building layers from the Topographic Objects *** research procedure was carried out using the GIS environment,through spatial analysis,geoprocessing algorithms,and spatial *** results have shown that post-industrial cities do not develop their urban resi-lience based on the expansion of green spaces and,consequently,do not build green urban *** addition,the research has proven that the greatest loss of green spaces is noticeable in parts of post-industrial cities with medium and high development intensity,where there is an intensification of con-struction *** dominant direction of the transformation of green spaces has been the conversion of agricultural areas into green spaces(87.79%).In contrast,the main direction of loss in green space has been the creation of new industrial units(24.80%)and the expansion of the urban fabric(23.53%).The article is original due to the fact that there is a gap in the literature regarding the study of green spaces in post-industrial cities with regard to the concept of green urban resilience.

关键词： Green spaces Spatial analysis Land cover transformation Development Anthropopressure Degradation

Mechanical Properties, Microstructure and Surface Quality of Polypropylene Green Composites as a Function of Sunflower Husk Waste Filler Particle Size and Content

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Journal of Renewable Materials 2021年第5期9卷 841-853页

作者： Mateusz Barczewski Jacek Andrzejewski Radomir Majchrowski Kamil Dobrzycki krzysztof Formela Poznan University of Technology Institute of Materials TechnologyPoznanPoland Poznan University of Technology Institute of Mechanical TechnologyPoznanPoland Gdansk University of Technology Department of Polymer TechnologyFaculty of ChemistryGabriela Narutowicza 11/12GdanskPoland

Agricultural waste is a still untapped source of materials that can,in case of proper utilization,significantly improve the sustainability of polymers and their *** this work,polymer composites based on isotactic polypropylene were produced incorporating ground sunflower husk in the amount of 10 wt%and 20 wt%.The work’s main objective is to evaluate how preliminary fractioning of this agricultural waste filler affects the thermomechanical properties,microstructure and surface topology of polypropylene-based injection molded compo*** composites were analyzed for mechanical properties(tensile,impact strength and hardness),thermomechanical properties(Vicat softening point VST,heat deflection temperature HDT,and dynamic thermomechanical analysis DMTA)with reference to morphological changes evaluated using scanning electron microscopy(SEM).The quality of the produced composites was assessed on the basis of the analysis of the surface topology of the injected *** has been shown that the larger particle size of used filler has a direct impact on increasing composite stiffness in the room and elevated ***,a relationship was demonstrated between the size of the filler and the deterioration of the tensile strength in the case of composites with a higher content of *** results show that the addition of sunflower husk as a particle-shaped waste filler is an effective method to increase sustainability of polypropylene-based green composites with beneficial thermomechanical properties and to reduce the residue of sunflower husk from industrial oil production.

关键词： Polypropylene sunflower husk green composite waste filler structure-property relationships

Seismic evaluation of the destress blasting efficiency

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第5期14卷 1501-1513页

作者： krzysztof Fuławka Piotr Mertuszka Witold Pytel Marcin Szumny Tristan Jones Research and Development Centre KGHM Cuprum Ltd.Wrocław53-659Poland Luossavaara-Kiirunavaara AB(LKAB) MalmbergetSE-98381Sweden

In this paper, selected methods of destress blasting efficiency assessment are presented, and novel quantitative methods based on in situ seismic measurements are proposed. The newly formulated solution combines two different approaches. The first, which is useful mostly for the near-field seismic analyses, is based on the analysis of seismic amplitude characteristics, and the second, relevant for farfield evaluation, is extended by the duration and frequency of the seismic wave. Both approaches are based on the seismic analyses of the waveforms generated by blasting recorded by the local seismic network. The proposed solutions are tested and validated in deep underground mines in Poland in which the room-and-pillar mining method is applied. Based on performed analysis, it is shown that both methods may be used as a rockburst hazard control in underground mines. However, developed methods may also be successfully implemented in other engineering practices, including the assessment of seismic vibrations in open pits and quarries.

关键词： Rockburst hazard Destress blasting Induced seismicity Seismic events Dominant frequency

Organic-walled Microfossils from the Early Middle Cambrian sediments of the Holy Cross Mountains,Poland：Possible Implications for Sedimentary Environment in the SE Margin of the Baltica

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 39-50页

作者： Marta BAK Lucyna NATKANIEC-NOWAK Beata NAGLIK krzysztof BAK Pawel DULEMBA Faculty of Geology Geophysics and Environmental Protection AGH University of Science and Technology Mickiewieza 30 30-059 Krakow Poland Institute of Geography Pedagogical University of Cracow Podchorazych 2 30-084 Krak6w Poland

An association of organic-walled microfossils consisting of filamentous cyanobacteria, algal coenobia and acanthomorphic acritarch have been documented from non-calcareous claystones and mudstones of the Pepper Mountains Shale Formation（PMSF）, located in its stratotype area in the Pepper Mountains, which are part of the Holy Cross Mountains in Poland. These sediments represent the oldest strata of the ？ysogóry Unit, deposited on the edge of the East European Craton（Baltica）. Non-branched, ribbon-like and thread-like cyanobacteria trichomes exhibit morphological similarities to families Nostocaceae and Oscillatoriaceae. Cells assembled in rounded to irregular clusters of monospecific agglomerations represent multicellular algal coenobia, attributed to the family Scenedesmaceae. The co-occurrence of acritarchs belonging to species as Eliasum llaniscum, Cristallinium ovillense and Estiastra minima indicates that the studied material corresponds to the lower Middle Cambrian. Deposition of the PMSF took place in shallow marine environment, influenced by periodical freshwater inputs. The varying degree of coloration of organic-walled microfossils is interpreted in this study as factor indication of possible different source of their derivation. Dark brown walls of cells assembled in algal coenobia might have sustained previous humification in humid, terrestrial environments, which preceded their river transport into the sea together with nutrients, causing occasional blooms of cyanobacteria in the coastal environment and the final deposition of both groups of organisms in marine deposits.

关键词： algal coenobia filamentous cyanobacteria acritarchs Cambrian Baltica Holy Cross Mountains

Tubulin glutamylation: a skeleton key for neurodegenerative diseases

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Neural Regeneration Research 2019年第11期14卷 1899-1900页

作者： Siem van der Laan Geronimo Dubra krzysztof Rogowski Institute of Human Genetics (IGH) Tubulin Code Team Centre National de la Recherche Scientifique (CNRS)-University of Montpellier

Microtubules (MTs) are cytoskeletal elements formed by a non-covalent association of α- and β-tubulin heterodimers. They provide structure and shape to all eukaryotic cells and are implicated in a variety of fundamental cellular processes including cell motility, cell division, mechanotransduction as well as long-distance intracellular cargo transport. In neurons, they constitute the molecular frame that maintains the lengthy axonal projections. In view of the relative size of some axons in the human body, which can reach up to 1 m, the active transport of e.g., vesicles over the MT arrays to the synaptic cleft, is of particular importance.

关键词： neurodegenerative diseases Microtubules(MTs) cellular processes