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Search results for: chemical composition of food
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The results of physico – chemical and microbiological testing of watercourses around the municipality of Gdańsk in 2004
Open Research DataThe dataset contains the results of a bacteriological and physico-chemical study of watercourses waters within the administrative boundaries of Gdańsk city in 2004. The examined material consisted of water samples collected from 15 watercourses within the administrative boundaries of Gdańsk, Poland.
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The results of physico – chemical and microbiological testing of watercourses around the municipality of Gdańsk in 2003
Open Research DataThe dataset contains the results of a bacteriological and physico-chemical study of watercourses waters within the administrative boundaries of Gdańsk city in 2003. The examined material consisted of water samples collected from 14 watercourses within the administrative boundaries of Gdańsk, Poland.
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Fluctuation - enchanced chemical sensing
PublicationCzułość i selektywność sensorów gazu może ulec poprawie jednocześnie gdy wykorzysta się informację zawartą w szumach występujących w sensorze. W pracy opisano szczegółowo kilka metod stosowanych do analizy szumów sensorów gazu. Przedstawiono wyniki ostatnich eksperymentów przeprowadzonych na komercyjnych sensorach gazu Taguchi, sensorach SAW oraz MOS-FET.
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The variability of Hg concentration and composition of marine phytoplankton
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Structuring of Emulsions by Tailoring the Composition of Crystalline Emulsifier
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Characteristics and biochemical composition of kombucha – fermented tea
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The approach to engineering tasks composition on knowledge portals
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The Stance, Factors, and Composition of Competitiveness of SMEs in Poland
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Evaluation of Workflow Runtime Platforms in Service Composition
PublicationTypically, workflow applications are constructed from basic functionalities that may be realized by alternative services deployed in heterogeneous runtime platforms. Depending on workflow structure and selection of services, the applications differ in attributes such as price, Quality of Service (QoS) and others. In the paper, we propose a method of evaluation of workflow runtime platforms using Data Envelopment Analysis. We present...
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Modelling the effect of composition on the tensile properties of concrete
PublicationRozdział omawia wyniki analizy mezoskopowej procesu pękania w betonie podczas zginania. Obliczenia wykonano na poziomie mezo wykorzystując model degradacji sztywności z nielokalnym osłabieniem. Zbadano wpływ właściwości kruszywa, stref przejściowych, nacięcia oraz długości charakterystycznej mikrostruktury na zachowanie sie betonu. Zaproponowano 2 metody określenia reprezentatywnego elementu objętościowego w betonie.
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Chemical analysis of the Au-Ag nanoaloys
Open Research DataThe nanostructures of AuAg nanoalloys were prepared by sequential sputtering of gold and silver thin films. Single layer thickness was usually 2.8 nm were deosted by magnetron sputtering method in a Ar plasma. As deposited layers were annealed in Ar atmosphere at 550 degress for 15 minutes. For XPS measurements five samples were selected: pure gold...
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Industrial wastewater as an external carbon source for optimization of nitrogen removal at the "Wschod" WWTP in Gdansk (Poland)
PublicationCarbon source alternatives for denitrification belong to the highest research area priorities as they allow to optimize N removal within the existing capacities. In particular, some food industry effluents appear to be good candidates for such alternatives due to their high C/N ratios and high content of readily biodegradable organic fraction. The aim of this study was to determine the immediate effects of dosing different types...
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Application of human bile salts for in vitro digestion models
PublicationIn this study, experimental in vitro models simulating the environment of the human gastrointestinal tract were used to assess the impact of physiological surfactants, such as bile salts, on the kinetics of digestion. Bile salts are biosurfactants synthesised in the liver and secreted together with bile into the small intestine. There are many reports on the role of bile salts in lipolysis, but the knowledge of their influence...
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Evaluation of Selected Heavy Metal Contaminants as Well as Nitrates and Nitrites in the Microgreens of Nigella (Nigella sativa L.), Safflower (Carthamus tinctorius L.), and Camelina (Camelina sativa L.) at Different Stages of Vegetation
PublicationMicrogreens are a new, rapidly growing group of foodstuffs. The decorative function of these is often accompanied by their use in traditional dishes. As microgreens are eaten at very early stages, when the development of the epidermis is at its minimum, the bioavailability of minerals will be found to be higher in microgreens then in mature vegetables. So, microgreens can be an excellent functional food, especially for mineral-deficient...
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Opakowania – źródłem zanieczyszczenia żywności. Problemy analityczne
PublicationJeszcze do niedawna materiały przeznaczone do kontaktu z żywnością (Food Contact Materials - FCM) nie były brane pod uwagę w kontekście stanowienia potencjalnego źródeł zanieczyszczeń żywności. Poświęcano im zdecydowanie mniej uwagi, niż np. pestycydom, czy metalom ciężkim. Jednak rozwój procedur analitycznych zapewniających możliwość oznaczenia analitów na coraz to niższych poziomach zawartości a także większa wiedza na temat...
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How high-tech solutions support the fight against IUU and ghost fishing: a review of innovative approaches, methods, and trends
PublicationIllegal, Unreported, and Unregulated fishing is a major threat to human food supply and marine ecosystem health. Not only is it a cause of significant economic loss but also its effects have serious long-term environmental implications, such as overfishing and ocean pollution. The beginning of the fight against this problem dates since the early 2000s. From that time, a number of approaches and methods have been developed and reported....
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Specific detection of Alternaria alternata by PCR and real-time PCR
PublicationFungi of Alternaria genus are cosmopolitan organisms, which spores can be found in the air, soil, water, clothing and food. They commonly occur as saprotrophs on the plant remains, contributing to the decomposition of organic matter. Additionally, they are components of the normal human and animal skin flora. Alternaria spp. are also known human allergens, causing hay fever and allergic reactions that can lead to the development...
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Mangiferin Affects Melanin Synthesis by an Influence on Tyrosinase: Inhibition, Mechanism of Action and Molecular Docking Studies
PublicationMangiferin is a strong antioxidant that presents a wide range of biological activities. The aim of this study was to evaluate, for the first time, the influence of mangiferin on tyrosinase, an enzyme responsible for melanin synthesis and the unwanted browning process of food. The research included both the kinetics and molecular interactions between tyrosinase and mangiferin. The research proved that mangiferin inhibits tyrosinase...
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Exposure scenario and risk assessment of infants and newborns to bisphenols and their derivatives from diapers
PublicationNewborns and infants are more sensitive to harmful compounds such as bisphenols and their derivatives because of their not fully developed detoxification mechanism. Exposure to these substances can lead to developmental problems and health consequences in adulthood. Since disposable baby diapers are used from the first days of life and remain in contact with the baby skin, it seems important to monitor the levels of endocrine disrupting chemicals...
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A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates
PublicationA 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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The role of lipids in food quality. [Chapter] 9
PublicationZawartość lipidów zależy od gatunku i stanu dojrzałości surowców żywnościowych, a ich stabilność od interakcji z innymi składnikami oraz od warunków obróbki i składowania. Przemiany lipidów wpływają na barwę wielu surowców i produktów żywnościowych, szczególnie mięsa, ryb i bezkręgowców morskich a także na ich zapach. Lipidy uczestniczą w tworzeniu reologicznych właściwości produktów mięsnych i rybnych, emulsji, wyrobów piekarskich...
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Knowledge and knowledge management in agro-food systems
PublicationW artykule przedstawiono zagadnienia związane z zarządzaniem wiedzą w systemach rolno-spożywczych, a także możliwości zastosowania tej koncepcji w rozwoju zrównoważonym.
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Chlorophylls and their Derivatives Used in Food Industry and Medicine
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Phycobilins and Phycobiliproteins Used in Food Industry and Medicine
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The Use of Bacteriophages in Animal Health and Food Protection
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Phytotherapy and food applications from Brassica genus
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Climate Changes in Southeastern Poland and Food Security
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[Chapter] 2. Thermostable enzymes in food processing
PublicationW rozdziale przedstawiono charakterystykę termostabilnych hydrolaz glikozydów, izomeraz, transferaz,lipaz i enzymów proteolitycznych w przetwórstwie rozmaitych surowców źywnościowych. Podano przyczyny termostabilności tych enzymów oraz wymieniono korzyści wynikające z ich stosowania.
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Knowledge and knowledge management in agro-food systems
PublicationArtykuł prezentuje zmiany, które się dokonały w systemach rolno-spożywczych, postrzeganych jako złożone sieci wzajemnie na siebie oddziałujących graczy. W artykule opisano również wyzwania, jakim te systemy muszą sprostać. Ponadto, zaprezentowano koncepcję zarządzania wiedzą i jej zastosowanie w systemach rolno-spożywczych.
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Instrumental techniques used for assessment of food quality
PublicationW artykule scharakteryzowano dwie techniki instrumentalne stosowane w ocenie jakości produktów spożywczych, tj. chromatografię gazową w połączeniu z detekcją olfaktometryczną oraz nos elektroniczny. Opisano zasady działania obu technik oraz typowe procedury analityczne stosowane w ocenie zapachu. Ponadto, podano przykłady praktycznego zastosowania obu technik, włącznie z tymi, które wykorzystano w pracowni autorów.
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Effects of solution composition and electrophoretic deposition voltage on various properties of nanohydroxyapatite coatings on the Ti13Zr13Nb alloy
PublicationThe purpose of the research was to establish the influence of the solution composition and the electrophoretic deposition voltage on the coating homogeneity and thickness, nanohardness, adhesion, corrosion resistance and wettability. The Ti13Zr13Nb alloy was coated by the electrophoretic technique with hydroxyapatite in a solution containing 0.1, 0.2 or 0.5 g nanoHAp in 100 mL of suspension and at voltage 15, 30 or 50 V. The scanning...
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Environmental characteristics of a tundra river system in Svalbard. Part 2: Chemical stress factors
PublicationBacterial communities in the Arctic environment are subject to multiple stress factors, including contaminants, although typically their concentrations are small. The Arctic contamination research has focused on persistent organic pollutants (POPs) because they are bioaccumulative, resistant to degradation and toxic for all organisms. Pollutants have entered the Arctic predominantly by atmospheric and oceanic long-range transport,...
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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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How to evaluate methods used in chemical laboratories in terms of the total chemical risk? – a ChlorTox Scale
PublicationReliable assessment of the health and environmental risk associated with the use of chemicals is critical to ob- jectively evaluate the greenness and whiteness of an analytical method. An objective and useful way of risk assessment should take into account all the relevant properties of used substances, their actual amounts needed for application of the method, and quantify the assessment result using a standardized unit. This...
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Distinction of clenbuterol intake from drug or contaminated food of animal origin in a controlled administration trial – the potential of enantiomeric separation for doping control analysis
PublicationThe differentiation of clenbuterol abuse and unintentional ingestion by contaminated meat is crucial with respect to the valuation of an adverse analytical finding in human sports doping control. The proportion of the two enantiomers of clenbuterol may serve as potential discriminating parameter. For the determination of the individual enantiomers, specific methods were developed and validated for the different matrices under investigation...
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Chemical Industry & Chemical Engineering Quarterly
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Electrochemical degradation of textile dyes in a flow reactor: effect of operating conditions and dyes chemical structure
PublicationIn 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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Release of selected chemical elements from shale drill cuttings to aqueous solutions of different pH
PublicationThe effect of pH changes on leachability of light and heavy metals from shale drill cuttings generated from unconventional shale gas production was investigated. Cuttings, being the primary byproduct generated from drilling operations, belong to the potentially hazardous type of wastes due to presence of heavy and radioactive elements and remains of drilling fluid. In this regard, assessment of potentially dangerous components...
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Wheat bread enriched with raspberry and strawberry oilcakes: effects on proximate composition, texture and water properties
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The Sea And The Beach As Composition Elements Of The Coastal Gardens In West Prussia In The 19th Century
PublicationThe melancholic and changeable character of the Baltic Sea has often been used in the painting of the romantic period. The sea and its beaches were also an important composition element as well as a supplement of Baltic coastal gardens which were founded in West Prussia in the 19th century. Gardens set up on the coast used various moods of nature, as well as extensive and beautiful sea landscapes, often leading to nostalgia. The...
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Bacterial Pathogens in the Food Industry: Antibiotic Resistance and Virulence Factors of Salmonella enterica Strains Isolated from Food Chain Links
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Chemical Vapor Transport Route toward Black Phosphorus Nanobelts and Nanoribbons
PublicationChemical vapor transport (CVT) method is widely used for bulk black phosphorus (BP) fabrication. In this work, we demonstrate that CVT provides a route for the fabrication of BP nanoribbons and nanobelts. This method consists of a two-step procedure, including initial BP column growth using the CVT technique, followed by ultrasonic treatment and centrifugation. The obtained nanostructures preserve BP column dimensions, forming...
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Chemical Vapor Transport Route toward Black Phosphorus Nanobelts and Nanoribbons
PublicationChemical vapor transport (CVT) method is widely used for bulk black phosphorus (BP) fabrication. In this work, we demonstrate that CVT provides a route for the fabrication of BP nanoribbons and nanobelts. This method consists of a two-step procedure, including initial BP column growth using the CVT technique, followed by ultrasonic treatment and centrifugation. The obtained nanostructures preserve BP column dimensions, forming...
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Enterococci isolated from plant-derived food - Analysis of antibiotic resistance and the occurrence of resistance genes
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The results of physico – chemical monitoring of watercourses around the municipality of Gdańsk in 2016
Open Research DataThe dataset contains the results of a physico-chemical study of watercourses waters within the administrative boundaries of Gdańsk city in 2016. The examined material consisted of water samples collected from 16 watercourses (5 rivers, 6 streams, 2 storm water sewers, 1 artificial canal, 1 artificial arm of a river and 1 drainage trench) flowing directly...
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Direct Analysis of Samples of Various Origin and Composition Using Specific Types of Mass Spectrometry
PublicationOne of the major sources of error that occur during chemical analysis utilizing the more conventional and established analytical techniques is the possibility of losing part of the analytes during the sample preparation stage. Unfortunately, this sample preparation stage is required to improve analytical sensitivity and precision. Direct techniques have helped to shorten or even bypass the sample preparation stage; and in this...
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The phenomenon of increasing capacitance induced by 1T/2H-MoS2 surface modification with Pt particles – Influence on composition and energy storage mechanism
PublicationIn this paper, several approaches to the synthesis of molybdenum-based electrode materials for supercapacitors are presented, including anodization, hydrothermal process and annealing. For the material prepared via anodization of a molybdenum plate, followed by a hydrothermal process in thiourea aqueous solution, a thorough study of the Pt-surface modification through repetitive cycling in 1 M sulfuric acid with Pt acting as a...
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