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Wyniki wyszukiwania dla: baltic sea, environmental pollution, fecal coliforms, coastal rivers, microbiological and chemical quality, coastal landscape park
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Investigating the drinking and surface water quality and associated health risks in a semi-arid multi-industrial metropolis (Faisalabad), Pakistan
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The effect of sludge thermal disintegration on quality of effluents
PublikacjaDezintegracja osadów ściekowych prowadzona jest w celach intensyfikacji procesu fermentacji metanowej oraz poprawy odwadnialności osadów ściekowych. Przedstawiono zmiany jakości cieczy nadosadowej osadów ściekowych poddanych procesowi termicznej dezintegracji. Określono zmiany wartości chemicznego zapotrzebowania na tlen oraz stężenia azotu amonowego, białka, fosforanów oraz lotnych kwasów tłuszczowych.
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Sea spray as a secondary source of chlorinated persistent organic pollutants? - Conclusions from a comparison of seven fresh snowfall events in 2019 and 2021
PublikacjaSecondary sources of persistent organic pollutants (POPs) gain in importance worldwide as primary sources decline. In this work, we aim to determine whether sea spray may be a secondary source of chlorinated POPs to the terrestrial Arctic, since a similar mechanism was proposed there only for the more water-soluble POPs. To this end, we have determined polychlorinated biphenyls and organochlorine pesticides concentrations in fresh...
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Chemical Composition and Antimicrobial Activity of New Honey Varietals
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Encouraging pro-environmental behaviour through an educational mobile application: Preliminary insights from early adopters
PublikacjaThis article aims to explore the extent to which the educational mobile application PULA supports and promotes pro-environmental behaviours, identify the most utilised functionalities by early adopters, and explore the least engaged functionalities. The study employs a quantitative approach based on data collected from the application. The analysis provides a comprehensive understanding of users' experiences and behaviours within...
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Encouraging Pro-environmental Behaviour Through an Educational Mobile Application: Preliminary Insights from Early Adopters
PublikacjaThis article aims to explore the extent to which the educational mobile application PULA supports and promotes pro-environmental behaviours, identify the most utilised functionalities by early adopters, and explore the least engaged functionalities. The study employs a quantitative approach based on data collected from the application. The analysis provides a comprehensive understanding of users' experiences and behaviours within...
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The innovative Exploitation of Brassica Vegetables in the Health Quality Food Production Chain
PublikacjaIn this overview the multidirectional opportunities of innovative exploitation of chemical and biological properties of vegetables from Brassiceae family are discussed. The specific chemical composition of brassicas, as regard both nutrients and non-nutrients, renders them particularly suitable for the health food production chain, literally from field to fork. the ability of these plants to accumulate heavy metals may be utilised...
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The innovative exploitation of Brassica vegetables in the health quality food production chain
PublikacjaIn this overview the multidirectional opportunities of innovative exploitation of chemical and biological properties of vegetables from Brassiceae family are discussed. The specific chemical composition of brassicas, as regard both nutrients and non-nutrients, renders them particularly suitable for the health food production chain, literally from field to fork. the ability of these plants to accumulate heavy metals may be utilised...
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Early Oceanographical Data Collected by the Institute of Oceanography, University of Gdańsk
PublikacjaThree data sets entitled Water currents in Głębinka Passage in late spring of 1975, Hydrometeorological and hydrochemical conditions in the Gulf of Gdańsk in the vicinity of Vistula river mouth in July of 1977, and Gulf of Gdańsk monitoring conducted by the Institute of Oceanography, University of Gdańsk, in 1981–1994 contain archival field measurement results from the Gulf of Gdańsk (the southern Baltic). The data can be used...
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Reemission of inorganic pollution from permafrost? A freshwater hydrochemistry study in the lower Kolyma basin (North-East Siberia)
PublikacjaPermafrost regions are under particular pressure from climate change resulting in widespread landscape changes, which impact also freshwater chemistry. We investi- gated a snapshot of hydrochemistry in various freshwater environments in the lower Kolyma river basin (North-East Siberia, continuous permafrost zone) to explore the mobility of metals, metalloids and non-metals resulting from permafrost thaw. Partic- ular attention...
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Formaldehyde in Human Saliva as an Indication of Environmental Tobacco Smoke Exposure
PublikacjaSkład środowiskowego dymu tytoniowego zależy przede wszystkim od stosowanej odmiany tytoniu oraz różnorodnych dodatków wprowadzanych do tytoniu na etapie produkcji papierosów. Podczas palenia tytoniu węglowodany ulegają złożonym przemianom, w wyniku których powstają toksyczne składniki środowiskowego dymu tytoniowego, w szczególności aldehydy (formaldehyd). Celem badań było uzyskanie informacji o poziomie zawartości formaldehydu...
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Global Approaches to Reduce Light Pollution from Media Architecture and Non-Static, Self-Luminous LED Displays for Mixed-Use Urban Developments
PublikacjaUrban environments have become significantly brighter and more illuminated, and cities now consider media architecture and non-static, self-luminous LED displays an essential element of their strategy to attract residents, visitors, and tourists in the hours after dark. Unfortunately, most often, they are not designed with care, consideration, and awareness, nor do they support the visual wellbeing and circadian rhythms of humans....
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Integration and Visualization of the Results of Hydrodynamic Models in the Maritime Network-Centric GIS of Gulf of Gdansk
PublikacjaEnsuring of security in the coastal area makes on a seaside countries research in the field of infrastructure spatial information of environmental data. The paper presents the results of work on the construction of this infrastructure by integrating electronic navigational chart with ortophotomaps of coastal areas as well as numerical data from weather and hydrodynamic models. Paper focuses on a problems associated with creating...
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A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates
PublikacjaA new efficient method for the chemical decomposition of polyamide 6.6 by the glycolysis and amino-glycolysis processes was proposed. The glycolysis was conducted using the mass excess of ethylene glycol (EG) as a decomposing agent in the presence of a catalyst. Also, a mixture of EG and triethylenetetramine was used as another decomposing agent in the amino- glycolysis process. The described process of decomposition did not...
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Chemical Composition of Industrial Wood Waste and the Possibility of its Management
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Management in landscape in the context of development investment areas on the example of factory VW in Białężyce
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Evaluation of the changes in the rural landscape of Napachanie (Wielkopolska voivodeship) by historical analysis GIS
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Automatic singing quality recognition employing artificial neural networks
PublikacjaCelem artykułu jest udowodnienie możliwości automatycznej oceny jakości technicznej głosów śpiewaczych. Pokrótce zaprezentowano w nim stworzoną bazę danych głosów śpiewaczych oraz zaimplementowane parametry. Przy pomocy sztucznych sieci neuronowych zaprojektowano system decyzyjny, który oceniono w pięciostopniowej skali jakość techniczną głosu. Przy pomocy metod statystycznych udowodniono, że wyniki generowane przez ten system...
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Postawy pracowników wobec zróżnicowania wiekowego w zespołach i organizacjach
PublikacjaArtykuł dotyczy postaw pracowników wobec zróżnicowania wiekowego w zespołach i organizacjach. W literaturze podkreśla się, że czynnikiem warunkującym efektywność takich zespołów są m.in. postawy pracowników wobec osób z innych grup wiekowych oraz wobec pracy z nimi, a ocena postaw pracowników jest niezbędna do wykorzystania właściwych metod zarządzania takim zespołem. Celem artykułu jest przedstawienie wyników badań dotyczących...
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Determination of probabilities defining safety of a sea-going ship during performance of a transportation task in stormy weather conditions
PublikacjaThe paper presents the possibility of applying the theory of semi-Markov processes to determine the limiting distribution for the process of changes of technical states being reliability states of the systems of sea-going ships significantly affecting safety of such ships, which include main engine, propeller and steering gear. The distribution concerns the probabilities of occurrence of the said states defined for a long time...
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Radioactivity of drilling cuttings from shale resources of the Lower Paleozoic Baltic Basin, Poland
PublikacjaFractionated drilling wastes originating from shale gas exploration in the Baltic Basin in Pomerania were subjected to the measurements of mean activity concentrations of naturally occurring radioactive materials (NORMs).To better understand rock structure and texture, the X-ray diffraction analysis (XRD) and scanning electron microscopy(SEM) observation were used. To compare activity concentration of radionuclides in bulk wastes...
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Sustainable carbon microtube derived from cotton waste for environmental applications
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Narrowband Transmission Quality in Presence of Modified IEEE 802.15.4a UWB Signal
PublikacjaThis paper presents results of measurement of narrowband transmission quality in presence of impulse radio UWB interference. In the first part of paper, unmodified IEEE 802.15.4a IR UWB signal is used. Then some modification of transmitted pulse sequence is proposed, which allow to reduce UWB power spectral density at frequency of narrowbandtransmission. Finally narrowband transmission quality in presence of modified ultrawideband...
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Grazing of Native Livestock Breeds as a Method of Grassland Protection in Roztocze National Park, Eastern Poland
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Narrowband Transmission Quality in Presence of Modified IEEE 802.15.4a UWB Signal
PublikacjaThis paper presents results of measurement of narrowband transmission quality in presence of impulse radio UWB interference. In the first part of paper, unmodified IEEE 802.15.4a IR UWB signal is used. Then some modification of transmitted pulse sequence is proposed, which allow to reduce UWB power spectral density at frequency of narrowband transmission. Finally narrowband transmission quality in presence of modified ultrawideband...
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Quality Aspects in Digital Broadcasting and Webcasting Systems: Bitrate versus Loudness
PublikacjaIn this paper the quality aspects of bitrate and loudness in digital broadcasting and webcasting systems are examined. The authors discuss a survey concerning user preferences related with processing and managing audio content. The coding efficiency of a popular audio format is analyzed in the context of storing media. An objective study on a representative group of signal samples, as well as a subjective study of the perceived...
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Quality prediction of foil capacitors by acoustic emission signals
PublikacjaJakość i trwałość kondensatorów foliowych jest zależna od ich warunków pracy (np. nadmiarowego napięcia pracy, temperatury, wilgotności) oraz od potencjalnych defektów wprowadzonych na różnych etapach wytwarzania kondensatorów. Nieustanny nacisk na wzrost jakości wytwarzanych elementów przy jednoczesnej redukcji kosztów wytwarzania oznacza, że nowe, tanie i szybkie metody predykcji jakości tych elementów są mocno poszukiwane. W...
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Static Series and Shunt-series PE Voltage-quality Controllers
PublikacjaAs presented in the Chap. 7 static shunt power electronics (PE) voltage-quality controllers protect the utility electrical system from the unfavorable impact of customer loads. Shunt controllers, as shown in Chap. 6, are recommended mainly for mitigation of the causes of disturbances, and not their effects in distanced nodes of a power-electronics system. In the case when reduction of disturbances effects is required, which leads...
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Development of environmental analytics and monitoring. Case study - Chemical Faculty of Gdansk University of Technology (GUT) = Rozwój analityki środowiskowej i monitoringu - działalność na Wydziale Chemicznym Politechniki Gdańskiej
PublikacjaOstatnie dekady są okresem gwałtownego rozwoju analityki i monitoringu środowiskowego. Opracowano nowe metodyki i rozwiązania aparaturowe, co pozwoliło na lepszą oceną stanu środowiska i zachodzących w nim procesów.W tym artykule prezentowana jest działalność zespołu analitykow z Wydziału Chemicznego Politechniki Gdańskiej.
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The impact of lipophilicity on environmental processes, drug delivery and bioavailability of food components
PublikacjaLipophilic properties of the compound allow to predict its fate in living organisms and to propose the models of chemicals transport and accumulation in the ecosystem. Lipophilicity is also useful as the characteristic of chemicals in respect to their optimal attributes for specific biological and non-biological tasks. The lipophilicity descriptors define the potency of endo- and xenobiotics to metabolic transformations and their...
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Quality evaluation of agricultural distillates using different types of electronic noses
PublikacjaThe paper presents the results of investigation on quality evaluation of agricultural distillates using a prototype of electronic nose instrument and a commercial electronic nose of Fast/Flash GC type – HERACLES II. The prototype was equipped with TGS type semiconductor sensors. HERACLES II included two chromatographic columns with different polarity of stationary phase and two FID detectors. In case of the prototype volatile fraction...
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Analysis of catalitic reactors usefulness to reduce pollution generated by piston combustion engines with regard to ship main engines
PublikacjaThe article presents results which indicate that the use of catalytic reactors to reduce emissions of harmful compunds contained in the exhaust gas is important in the operation of vehicle motors operation. Efforts of the shipbuilding industry to reduce the toxicity of exhaust gas emitted by the main engines have been indicated and pointed to the desirability of the use of these catalysts in maritime transport. It has been pointed...
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Examining Quality of Hand Segmentation Based on Gaussian Mixture Models
PublikacjaResults of examination of various implementations of Gaussian mix-ture models are presented in the paper. Two of the implementations belonged to the Intel’s OpenCV 2.4.3 library and utilized Background Subtractor MOG and Background Subtractor MOG2 classes. The third implementation presented in the paper was created by the authors and extended Background Subtractor MOG2 with the possibility of operating on the scaled version of...
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Development of novel smartphone-based methods of wine quality assessment
PublikacjaThe doctoral dissertation concerns the development of novel smartphone-based analytical methods of wine quality evaluation, which would be in line with the stipulations of green and equitable analytical chemistry. This solution is based on the analysis of biogenic amines and selected bioactive compounds. The dissertation is based on four articles containing the results of research which led to the development of smartphone-based...
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Effective Air Quality Prediction Using Reinforced Swarm Optimization and Bi-Directional Gated Recurrent Unit
PublikacjaIn the present scenario, air quality prediction (AQP) is a complex task due to high variability, volatility, and dynamic nature in space and time of particulates and pollutants. Recently, several nations have had poor air quality due to the high emission of particulate matter (PM2.5) that affects human health conditions, especially in urban areas. In this research, a new optimization-based regression model was implemented for effective...
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Towards modelling of the environmental fate of pharmaceuticals using the QSPR-MM scheme
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A comprehensive review on environmental transformation of selenium: recent advances and research perspectives
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Present state and future of wetland technology in environmental protection in Poland
Publikacja: Polish experience with implementation and operation of constructed wetland systems are presented. Wetland technology can be applied for the removal of contaminants from aerial sources, point sources and for utilization of sewage sludge.From 1994-2002 monitoring of three different facilities for water protection was carried out. Substantial im-provement of water quality after implementation of the facilities was observed.From...
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Chemical Derivatization Processes Applied to Amine Determination in Samples of Different Matrix Composition
PublikacjaAmines are important biological compounds, and so their analysis and monitoring in various matrices is worthy of investigation and development.Due to the polar nature of amines, chromatographic analysis of free amines is generally unsatisfactory owing to adsorption and decomposition of the solute on the column, resulting in peak tailing and losses. Therefore, many derivatization reactions are employed to reduce the polarity, improve...
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Environmental characteristics of a tundra river system in Svalbard. Part 1: Bacterial abundance, community structure and nutrient levels
PublikacjaThe Arctic hosts a set of unique ecosystems, characterised by extreme environmental conditions and undergoing a rapid change resulting from the average temperature rising. We present a study on an aquatic ecosystem of the Revelva catchment (Spitsbergen), based on samples collected from the lake, river and their tributaries, in the summer of 2016. The landscape variety of the study site and the seasonal change in the hydrological...
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The critical factors of landfill fire impact on air quality
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Hydrofoil craft motions in rough sea
PublikacjaW pracy przedstawiono, bardziej od dotychczas znanych, matematyczny, liniowy model ruchów wodolotu na wzburzonym morzu. Fala jest wiatrową o zadanym widmie a kurs wodolotu względem głównego kierunku biegu fal może być dowolny. Wodolot może być jednokadłubowcem lub katamaranem, podpartym układem dwóch lub trzech płatów nośnych, przy czym co najmniej jego płaty dziobowe przecinają niezakłóconą powierzchnię wody. Płaty nośne mogą...
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Electrochemical degradation of textile dyes in a flow reactor: effect of operating conditions and dyes chemical structure
PublikacjaIn this study, electrochemical oxidation of five azo dyestuffs (Yellow D-5GN, Red D-B8, Ruby F-2B, Blue D-5RN, Black DN), that are widely used in the textile industry, was investigated in a flow reactor. BDD electrode with a high boron doping level (C/B = 10 000) was prepared and used. Two configurations of reactor were considered, i.e., one with the undivided cell, and the other with the cell divided by anodic and cathodic compartments....
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Effect of Microplastics Pollution on Hydrogen Production from Biomass: A Comprehensive Review
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Air Pollution, Oxidative Stress, and the Risk of Development of Type 1 Diabetes
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Changes in mussel Mytilus galloprovincialis protein profile as a reaction of water pollution
PublikacjaW pracy przedstawiono zmiany w profilu białkowym małża Mytilus galloprovincialis jako odpowiedź na zanieczyszczenia wody. Określono pojemność przeciwutleniającą z wykorzystaniem testu TEAC. Stwierdzono różnice w poziomie inhibicji w białku pochodzącym od małży zebranych z regionów zanieczyszczonych w stosunku do małży pochodzących z regionów czystych.Zawartość cynku i kadmu w białkach małży pochodzących z regionów zanieczyszczonych...
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Assessment of atmospheric inorganic pollution in the urban region of Gdańsk, Northern Poland
PublikacjaProjekt wykonano w przemysłowej części Gdańska w celu zidentyfikowania głównych źródeł zanieczyszczeń. Próbki suchego oraz żywego (w hodowli hydroponicznej) mchu eksponowano równolegle w celu określenia ich właściwości kumulacji w aspekcie badań biomonitoringowych. Analizę chemiczną składu próbek mchu wykonano dzięki zastosowaniu techniki aktywacji neutronowej i reaktorze badawczym w Delft (Holandia). Uzyskane wyniki wskazują,...
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Corporate social responsibility in reference to environmental statements within EMAS system in small and medium enterprises
PublikacjaAccording to the corporate social responsibility concept, organisations should apply any mechanisms available supporting their business actions contributing i.e. to the improvement of natural environment. Among them is EMAS eco-management and audit scheme. The prove of its implementation is environmental statement and entering the organisation into a national EMAS register. The aim of the statement is informing the society and...
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Multivariate Assessment of Procedures for Molecularly Imprinted Polymer Synthesis for Pesticides Determination in Environmental and Agricultural Samples
PublikacjaIn the case of quantitative and qualitative analysis of pesticides in environmental and food samples, it is required to perform a sample pre-treatment process. It allows to minimalize the impact of interferences on the final results, as well as increase the recovery rate. Nowadays, apart from routinely employed sample preparation techniques such as solid-phase extraction (SPE) or solid-phase microextraction (SPME), the application...
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Exploring perceptions of pro environmental educational mobile applications based on semantic field analysis
PublikacjaThe paper aims to identify multidimensional perceptions of mobile apps by their users. Special attention has been paid to pro-environmental educational apps. Semantic field analysis and measurement of emotional temperatures were performed to achieve this goal. Transcripts from seven focus group interviews were used as research material. The results indicate that functionality based on a reward or benefit system reinforces environmentally...