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Search results for: CERTIFIED REFERENCE MATERIALS (CRMS), FOOD SAFETY, QUALITY CONTROL/QUALITY ASSURANCE, SELENIUM, SELENIUM SPECIATION
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Stability of selenium diet supplement
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Quality Assurance of Educational Processes as the Foundation of the Quality Management System in Gdansk University of Technology
PublicationW opracowaniu przedstawiono rozwojowy model systemu zarządzania jakością w dużej uczelni technicznej. Punktem wyjścia dla tego projektowania tego modelu jest wewnętrzny system zapewnienia jakości kształcenia oparty na wytycznych ENQA a kluczowym czynnikiem wspierającym systemowo prowadzone zarządzanie wiedzą oraz samoocena.
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The role of lipids in food quality
PublicationZawartość lipidów zależy od gatunku i stanu dojrzałości surowców żywnościo-wych. Zależnie od zawartości i składu lipidy wpływają korzystnie na wartośćbiologiczną żywności lub wywierają efekt niepożądany. Lipidy i produkty ichprzemian oraz reakcji z innymi składnikami uczestniczą w tworzeniu barwy,tekstury, zapachu i smaku żywności.
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Aromagrams - aromatic profiles in the appreciation of food quality
PublicationW ostatnich latach obserwuje się coraz powszechniejsze stosowanie analizy instrumentalnej do oceny jakości organoleptycznej produktów spożywczych. Nowe podejście polega na tworzeniu profili zapachowych, swego rodzaju "aromagramów" charakterystycznych dla danego produktu. Do najczęściej stosowanych technik pozwalających na tworzenie i rozpoznawanie "aromagramów" należą techniki chromatograficzne, w szczególności chromatografia gazowa...
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Total Selenium Level and Its Distribution between Organs in Beef Cattle in Different Selenium Status
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Performance of a new commercial high-definition 3D patient specific quality assurance system for CyberKnife robotic radiotherapy and radiosurgery
PublicationConventional two dimensional and low-definition measurement techniques for dosimetric verification of radiotherapy treatment deliveries are no longer adequate in the era of hypofractionation and extremely high dose gradients. New quality assurance (QA) tools with 3D capability and high definition are urgently needed. The purpose of this study was to evaluate the performance of one of the first such commercial systems as applied...
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Devices for the production of reference gas mixtures
PublicationFor many years there has been growing demand for gaseous reference materials, which is connected with development in many fields of science and technology. As a result, new methodological and instrumental solutions appear that can be used for this purpose. Appropriate quality assurance/quality control (QA/QC) must be used to make sure that measurement data are a reliable source of information. Reference materials are a significant...
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On the synthesis of coupled-lossy resonator filters with unloaded quality factor control
PublicationA technique for fast synthesis of coupling matrix low-pass prototypes of generalized Chebyshev bandpass filters with lossy resonators is presented in this paper. The coupling matrix is found by solving a nonlinear least squares problem based on zeros and poles of filter's transfer functions. Additional constraints are introduced that allow one to control the level of unloaded quality factor of resonators.
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Chapter 1. Food components and quality
PublicationGłówne składniki żywności to woda, białka, sacharydy, lipidy i związki mineralne. Składniki występujące na ogół w mniejszych ilościach to niebiałkowe związki azotowe, witaminy, barwniki, związki zapachowe i dodatki funkcjonalne. Jakościowy i ilościowy skład żywności zależy od gatunku i odmiany surowców oraz warunków ich uprawy, żywienia, zbioru, przechowywania i przetwarzania. Składniki żywności i ich przemiany wpływają na zapach,...
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High-quality academic teachers in business school. The case of The University of Gdańsk, Poland
PublicationThe Bologna process, the increasing number of higher education institutions, the mass education and the demographic problems make the quality of education and quality of the academic teachers a subject of wide public debate and concern. The aim of the paper is to identify the most preferred characteristics of a teacher working at a business school. The research problem was: What should a high-quality business school academic teacher...
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Test objects for MRI quality assurance based on polymer gels
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Systematic Assessment of Product Quality
PublicationThe article describes an innovative metrizable idea for systemic assessments of product quality within the baking industry. Complex product quality analysis requires the employment of metrizability criteria for factors that impact the quality of the product, and these are called determinants. Therefore, such analysis is only possible with the use of systems engineering. A system represents the potential of a manufacturing process,...
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Functional safety with cybersecurity for the control and protection systems on example of the oil port infrastructure
PublicationSafety and cybersecurity aspects consist of two different group of functional requirements for the industrial control and protection systems in the oil port installation. It is the main reason why the analyses of safety and cybersecurity shouldn’t be integrated directly. These article presented some important issues of the functional safety analysis with regard to cybersecurity aspects in the oil seaport infrastructure. The proposed...
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Electronic Noses for Indoor Air Quality Assessment
PublicationThis chapter presents a proposal of the use of electronic noses in the monitoring of indoor air quality. The main focus is put on the detailed characteristics of today’s indoor air quality control methods, the types of pollution in the air, and the development of electronic noses for air testing. Currently, scientists seek methodological and structural solutions that would enable real-time online indoor air control. It has been...
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Surface quality control of a thin SiN layer by optical measurements
PublicationFiber optic interferometers have a wide range of applications, including biological and chemical measurements. Nevertheless, in the case of a reflective interferometer setup, standard silver mirrors cannot be used in every measurement, due to their chemical activity. This work investigates the surface quality of a thin optical layer of silicon nitride (SiN), which can serve as an alternative material for silver mirrors. We present...
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Quality of bottled waters
PublicationBottled water is a product that is purchased by annually increasing numbers of people of all age groups. The quality control of mineral waters tends to concentrate on the determination of anion and cation levels, since it is these that govern the taste, smell and possible medicinal properties of the water. The constantly rising sales of mineral waters bring with them the ever increasing exploitation of their sources. The consequences...
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Cross-cultural problem of quality
PublicationThe paper, by presenting issues such as variability of reality, quality of life, quality and environmental management systems, emphasizes the opportunities of taking the socially important problem under control by utilization of efficient quality engineering analytical methods.
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Quality Model for Integrated Security Monitoring and Control in Water Distribution Systems
PublicationThis article addresses the problem of drinking water distribution system (DWDS) security in the terms of water quality which in the era of terrorist threat is of high importance to the public. The contribution of this paper is the development of the so called security module to extend a multi-species water quality model. This gives an insight to the situation in DWDS not only under normal operational conditions but also in case...
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Two Time-Scale Hierarchical Control of Integrated Quantity and Quality in Drinking Water Distribution Systems
PublicationThe paper considers a feedback optimising control of drinking water distribution systems (DWDS). Although the optimised pump and valves scheduling and disinfectant injection control attracted considerable attention over last two decades most of the contributions were limited to an open-loop optimisation repetitively performed during the DWDS operation. Also, while a strong interaction between the water quantity and quality exists...
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QUALITY GAPS IN HIGHER EDUCATION FROM THE PERSPECTIVE OF STUDENTS
PublicationThe presented research work relates to the category of quality in higher education. This article aims to present the determinants of the quality of education in the context of international standards. The background of the considerations is the Bologna Declaration and the European Higher Education Area. The results of the research carried out with the use of the nominal group method and the data analysis carried out based on the...
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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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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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Influence of the Addition of Selected Spices on Sensory Quality and Biological Activity of Honey
PublicationBee honey is nutritious and has numerous health benefits, but its taste is for many people too bland. Honey with addition of spices could be important to the food industry as a functional product with positive health image and interesting taste. Such product would definitely meet health-driven consumers’ expectations. Therefore, the aim of this study was to evaluate the effect of addition of selected spices on sensory, antimicrobial,...
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Non-matrix reference matrials- chalanges in the preparation of standard gas mixtures
PublicationIn the last few years particularly great pressure is exerted on quality control and assurance of analytical measurement results. An invaluable role in this process is played by reference materials. The paper presents the characteristics of basic types of reference materials, with particular attention to gaseous reference materials. In addition, a review of literature on techniques of preparation of gaseous standard materials, published...
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Quality control of cheese samples for the presence of natamycin preservative – A natural deep eutectic solvent (NADES) based extraction coupled with HPLC
PublicationA new protocol for the determination of natamycin – an antifungal agent used as a food preservative - in cheese samples – is described. This new method is based on a natural deep eutectic solvent (NADES) green extraction procedure. High-performance liquid chromatography (HPLC) was used for detection and quantification. NADESs with different molar ratios were evaluated for efficient and selective extraction. NADES made of thymol...
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Certified domination
PublicationImagine that we are given a set D of officials and a set W of civils. For each civil x ∈ W, there must be an official v ∈ D that can serve x, and whenever any such v is serving x, there must also be another civil w ∈ W that observes v, that is, w may act as a kind of witness, to avoid any abuse from v. What is the minimum number of officials to guarantee such a service, assuming a given social network? In this paper, we introduce...
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ANALYSIS OF IMPACT of SHIP model parameters on changes of control quality index in ship dynamic positioning system
PublicationIn this work there is presented an analysis of impact of ship model parameters on changes of control quality index in a ship dynamic positioning system designed with the use of a backstepping adaptive controller. Assessment of the impact of ship model parameters was performed on the basis of Pareto-Lorentz curves and ABC method in order to determine sets of the parameters which have either crucial, moderate or low impact on objective...
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Quality control in flexible manufacturing cell.
PublicationPublikacja dotyczy procesu produkcyjnego w środowisku komputerowo zintegrowanego wytwarzania. Ukazuje ona aspekty kontroli jakości wykonania części na różnych etapach procesu wytwórczego. W celu dokonania szczegółowej analizy problemu zebrano dane o jakości wykonania części na poszczególnych poziomach wytwarzania. Analizy dowiodły, że jakość wykonania części zależy od jakości użytych narzędzi a sterowanie nią wymaga optymalizacj...
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Daily dietary selenium intake of the Pomeranian District inhabitants
PublicationSe, uznawany za jeden z najważniejszych mikroelementów, znalazł sie w centrum zainteresowania naukowców z wielu dziedzin. Niedostatecznalub nadmierna zawartość Se w dziennej diecie może prowadzić do niekorzystnych zmian w funkcjonowaniu organizmu czlowieka, a więc aby temu zapobiec powinniśmy suplementować ten pierwiastek, bądź ograniczać jego wprowadzanie do organizmu. W związku z tym dzienna dawka selenu spożywana przez człowieka...
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The Properties, Functions, and Use of Selenium Compounds in Living Organisms
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QUALITY OF SWEET POTATO AS A RAW MATERIAL FOR FOOD PROCESSING
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Potential Methods of Electrochromic Materials Quality Assessment
PublicationPublikacja zawiera potencjalne metody oceny jakości prototypowych maateriałów wykonanych z warstw elektrochromowych. Warstwy te mogą zostać ocenione za pomocą anlizy sygnałów elektrycznych jak również metodami przetwarzania obrazów.
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Quality Expectations of Mobile Subscribers
PublicationMobile systems, by nature, have finite resources. Radio spectrum is limited, expensive and shared between many users and services. Mobile broadband networks must support multiple applications of voice, video and data on a single IP-based infrastructure. These converged services each have unique traffic holding and quality requirements. A positive user experience must be obtained through efficient partitioning of the available wireless...
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Consumerism and the Quality of Life
PublicationHigh level of consumption, driven by marketing activities, the pleasure and joy of possession and the accumulation of material goods are often associated with prosperity, sense of happiness and fulfilment in life. On a broader scale, economic indicators related to production and consumption are used to define the well-being and quality of life in societies. Unfortunately, the phenomenon of consumerism entails negative social and...
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Nonquadratic quality indices in estimation, approximation and control
PublicationZaproponowano wykorzystanie niekwadratowych miar jakości w zagadnieniach estymacji parametrów modeli, aproksymacji funkcji okresowych oraz syntezy układów sterowania. Rozważono funkcje celu w postaci ważonych sum lub całek wartości bezwzględnej błędu predykcji. Ponieważ tego typu wskaźniki jakości są w swoich ekstremach nieróżniczkowalne, zadanie minimalizacji funkcji celu rozwiązano stosując iteracyjny algorytm kolejnych przybliżeń....
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Passive samplers in indoor air quality control
PublicationPrzedstawiono wyniki badań jakości powietrza wewnętrznego w 12 wybranych mieszkaniach usytuowanych na terenie aglomeracji Trójmiejskiej z wykorzystaniem techniki pasywnej (dozymetria pasywna typu permeacyjnego) oraz techniki dynamicznej (rurki sorpcyjne wypełnione sorbentem Tenax TA). Wykorzystując nowe podejście do sposobu kalibracji dokonano monitoringu zarówno poszczególnych lotnych związków organicznych jak i sumarycznej zawartości...
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Lipidomic characteristics of three edible cold-pressed oils by LC/Q-TOF for simple quality and authenticity assurance
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The effect of package type on selected parameters of nutritional quality of the chilled stored red sauerkraut
PublicationThe key elements responsible for the quality of food are the technologies used toprocess raw materials and preserve obtained products. The aim of this paper wasto investigate the effect of package type (bags made from low density polyethylene[PE-LD] and the metallized polyethylene terephthalate [PET met/PE foil]) onselected quality parameters of the chilled stored red sauerkraut. Vegetables wereanalyzed before packaging and after...
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Harnessing endophytic fungi for biosynthesis of selenium nanoparticles and exploring their bioactivities
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Strong-coupling character of superconducting phase in compressed selenium hydride
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Developmental selenium exposure and health risk in daily foodstuffs: A systematic review and meta-analysis
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The application of TD-GC-FID technique for production of matrix-free reference materials
PublicationIn the last few years particular pressure is exerted on finding new analytical methods which would provide real possibilities of monitoring and control of the state of the environment. Intensive development of analytical techniques for measurements of gaseous media and the negative effects of BTX compounds make it necessary to produce new gaseous reference materials. To prepare the appropriate non- matrix reference material thermal...
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Speciation of heavy metal compounds in samples of biota from marine ecosystems
PublicationIt has become increasingly evident that the toxicity, mobility, bioavailability and bioaccumulation of metals are dependent on the particular physico-chemical form in which the element occurs in the environment. Special attention is paid to metals, which are essential for the proper functioning of organisms if present in appropriate amounts but are toxic if in excess (i.e. Se, Cr, Zn), and also to non-essential elements (i.e. Hg,...
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The Role of Proteins in Food
PublicationThis chapter describes the effect of proteins on the sensory attributes and the biological value and safety of foods. The role of proteins depends on their amino acid composition and structure, on changes due to storage and processing, as well as on interactions with other food components. The effect on the sensory quality of foods is brought about by hydrophobicity, solubility, water holding capacity, gelling, film formation,...
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The role of robotisation in improving bakery product quality
PublicationThe article aims to present the role of robotisation in increasing bakery product quality, as it is closely linked to machine reliability, as well as hygienic and sanitary conditions. All machines employed in the production process ought to be maintained at full production potential and reliability, which also has a fundamental influence on the final product’s quality. While participating in the 2014-2020 Smart Growth Operational...
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Quality system documentation of smes in process management framework
PublicationThe article presents elements of original methodology of process-oriented quality management system implementation to be applied in small organizations. The primary objective of the paper is to show process based documentation structure of a quality system and simple method of processes control description. Thus, guidelines for preparation of quality system documentation in process management framework, related research results...
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The microbial and sensory quality of mackerel hot smoked in mild conditions
PublicationThe quality indices of Atlantic mackerel, hot smoked at core temperature not exceeding 60°C, containing 14–27 g salt and 580–670 g water per kg meat, was determined just after smoking and during storage. The aerobic plate count after smoking, chilling and packing in cardboard boxes was 0–12 cfu/25 cm2of the skin of the smoked fish and 10–240 cfu/g of flesh. It was 1.9 log cycle lower than that in the frozen raw material. At 2°C,...
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Analytical procedures for quality control of pharmaceuticals in terms of residual solvents content: Challenges and recent developments
PublicationResidual solvents play an important role in the synthesis of drugs and in product formulations. In addition, they pose a serious problem, that is toxicity, as many of them exhibit toxic or environmentally hazardous properties. Therefore, constant monitoring of quality control is needed. In this study, we present an overview of regulatory and general methods described by various pharmacopoeias. Then, the most commonly used methodologies...
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Optimised Allocation of Hard Quality Sensors for Robust Monitoring of Quality in Drinking Water Distribution Systems
PublicationA problem of optimised placement of the hard quality sensors in Drinking Water Distribution Systems for robust quality monitoring is formulated. Two numerical algorithms to solve the problem are derived. The optimality is meant as achieving a desired trade off between the sensor capital and maintenance costs and resulting robust estimation accuracy of the monitoring algorithm. The robust estimation algorithm recently developed...
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The influence of different time durations of thermal processing on berries quality
PublicationBioactive compounds (polyphenols, flavonoids, flavanols, tannins, anthocyanins and ascorbic acid) and the level of antioxidant activity by ABTS, DPPH, FRAP and CUPRAC of water, acetone and hexane extracts of Chilean 'Murtilla' (Ugni molinae Turcz) and 'Myrteola' berries (Myrtaceae, Myrteola nummularia (Poiret) Berg.), Chilean and Polish blueberries (Vaccinium corymbosum), Chilean raspberries (Rubus idaeus), and Polish black chokeberry...