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Search results for: CHEMIA KWANTOWA
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Determination of the effective concentration of oxyteracycline solutions on the inhibition of bioluminescence of Vibrio fischeri (Microtox)
Open Research DataIn this study an attempt was made to determine the effective concentration for oxytetracycline solutions on the inhibition of bioluminescence of Vibrio fischeri (Microtox).
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Lodowa kraina - obszar badań dla chemika analityka. Cz. II. Wrażliwość ekosystemu Antarktyki na obecność zanieczyszczeń
PublicationW pracy ujęto problematykę zanieczyszczeń obszarów polarnych. Zwrócono szczególną uwagę na trwałe związki organiczne obecne na obszarze Antarktyki w różnych próbkach biotycznych i abiotycznych (szczegółowy opis współczesnych badań analitycznych prowadzonych w latach 2000 - 2013). Substancje chemiczne pochodzenia antropogenicznego mogą pojawiać się na terenach polarnych za sprawą transportu na duże odległości (LRAT). Badania poziomów...
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Ekspertyza techniczna posadzki budynku Wydziału Chemii Uniwersytety Gdańskiego położonego przy ul. Wita Stwosza w Gdańsku
PublicationPrzedmiotem opracowania jest posadzka z jastrychu wykonana w częściach komunikacyjnych – hole i korytarze, budynku nowej siedziby Wydziału Chemii Uniwersytetu Gdańskiego. Ekspertyza ma na celu określenie stanu technicznego posadzki, zarówno warstwy wykończeniowej jak i podbudowy, ocenę powstałych uszkodzeń oraz określenie przyczyny ich powstania. Ocenie podlegają założenia projektowe, technologia wykonania, jakość wykorzystanych...
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Ekspertyza techniczna posadzki budynku Wydziału Chemii Uniwersytetu Gdańskiego położonego przy ul. Wita Stwosza w Gdańsku.
PublicationPrzedmiotem opracowania była posadzka wielowarstwowa wykonana w częściach komunikacyjnych – hole i korytarze, budynku nowej siedziby Wydziału Chemii Uniwersytetu Gdańskiego. Ekspertyza ma na celu określenie stanu technicznego posadzki, zarówno warstwy wykończeniowej jak i podbudowy.
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Chemia, Budownictwo (stac.; II sem 21/22)
e-Learning CoursesMateriały do wykładu z przedmiotu Chemia dla studentów kierunku Budownictwo (studia I stopnia) semestru II (semestr letni). Tematyka kursu obejmuje podstawowe zagadnienia z chemii ogólnej, jak również specjalistyczne zagadnienia z zakresu chemii budowlanej, w tym: - podstawy chemii kwantowej, - reakcje chemiczne (stechiometria, podstawy termodynamiki i kinetyki reakcji), - fizykochemia wody, - roztwory wodne (stężenia,...
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ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
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Electrical properties of nanocrystalline Sm-doped ceria ceramics
PublicationWłaściwości ceramiki z cerii zależa zwykle silnie od struktury ziaren. W pracy przedstawiono właściwości elektryczne ceramiki z cerii domieszkowanej samarem wykonanje w technologii 'net shape' posiadającej strukturę nanokrystaliczną.
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Combining tight-binding and molecular dynamics methods to model the behaviour of metals in the plastic regime
PublicationOpisujemy zastosowanie metody dwuskalowej (kwantowo-klasycznej) w zastosowaniu do metali. Region energetycznie najważniejszy jest traktowany kwantowo, podczas gdy reszta układu jest traktowana klasycznie. Wprowadzamy własną implementację metody oraz przedstawiamy uzyskane wyniki dla metali.
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Detection and segmentation of moving vehicles and trains using Gaussian mixtures, shadow detection and morphological processing
PublicationSolution presented in this paper combines background modelling, shadow detection and morphological and temporal processing into one system responsible for detection and segmentation of moving objects recorded with a static camera. Vehicles and trains are detected based on their pixellevel difference from the continually updated background model utilizing a Gaussian mixture calculated separately for every pixel. The shadow detection...
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Chemia w Szkole
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CHEMICAL ENGINEERING SCIENCE
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DRUG AND CHEMICAL TOXICOLOGY
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Mechanika Kwantowa - Kopia
e-Learning CoursesMechanika kwantowa, 5 semestr fizyki technicznej
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Chemometric exploration of sea water chemical component data sets with missing elements
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Morphologic, Phylogenetic and Chemical Characterization of a Brackish Colonial Picocyanobacterium (Coelosphaeriaceae) with Bioactive Properties
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Solvent effects on the nitrogen NMR chemical shifts in 1-methylazoles – a theoretical study
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Theoretical analysis of solvent effects on nitrogen NMR chemical shifts in oxazoles and oxadiazoles
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Chemical Derivatization Processes Applied to Amine Determination in Samples of Different Matrix Composition
PublicationAmines 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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Syntheses, structures and chemical properties of unsaturated oligo(alkylene-ester-ether)diols
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Chapter 11 – Application of Chemical Sensors and Sensor Matrixes to Air Quality Evaluation
PublicationIndoor and outdoor air quality is one of the key factors influencing human health. However, air quality evaluation is not easy task. Air is a complex system, which is subjected to changes even within short period of time. Progress in analytical methods and analytical tools provides increasingly more reliable information on the condition and quality of indoor and outdoor air. This progress, however, generates an increase in the...
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Phytoplankton communities of polar regions–Diversity depending on environmental conditions and chemical anthropopressure
PublicationThe polar regions (Arctic and Antarctic) constitute up to 14% of the biosphere and offer some of the coldest and most arid Earth's environments. Nevertheless several oxygenic phototrophs including some higher plants, mosses, lichens, various algal groups and cyanobacteria, survive that harsh climate and create the base of the trophic relationships in fragile ecosystems of polar environments. Ecosystems in polar regions are characterized...
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A novel luminescent chemical sensor for the determination of Pb 2+ and Cu 2+ ions
PublicationSilica xerogel surface grafted with aminopropyl (PrNH2) groups was additionally treated by cetyltrimethylammonium bromide (CTAB) surfactant and ascorbic acid (asc) in alkaline solution. This material symbolized as SiO2-PrNH2-CTAB/asc, proved to be a stable luminescent material, exhibited an emission band peaked at 393 nm under excitation wavelength 335 nm. Time evolution of the band intensity suggests changes of defect concentration...
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Method for determination of the chemical composition of phases of the iron catalyst precursor for ammonia synthesis
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Thermodynamics of Chemical Processes in the System of Nanocrystalline Iron–Ammonia–Hydrogen at 350 °C
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Description of plants and assessment of chemical properties of three species from the Amelanchier genus
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Effect of substrate type on the field performance and chemical composition of highbush blueberry cv.Patriot
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Physical, chemical and biochemical properties of Western Siberia Sphagnum and Carex peat soils
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Chemical Munitions Search & Assessment—An evaluation of the dumped munitions problem in the Baltic Sea
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The Use of Chemical Sensors to Monitor Odour Emissions at Municipal Waste Biogas Plants
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Uncertainty in maritime risk analysis: Extended case study on chemical tanker collisions
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Phthalocyanines with bulky substituents at non-peripheral positions – Synthesis and physico-chemical properties
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Determination of the chemical structure of potential organic impurities occurring in drug substance opipramol
PublicationThe tricyclic antipsychotic and antidepressant drug opipramol (opipramole) was examined with regard to the chemical structure of its organic impurities. Impurities were isolated from the technical product by chromatographic methods and their chemical structures were established by 1H NMR, MS and FTIR and further confirmed by comparison with commercially available products or with products obtained by independent synthesis, and...
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Consequences of New Approach of Chemical Stability Tests of Active Pharmaceutical Ingredients (APIs)
PublicationThere is a great need of broaden look on stability tests of active pharmaceuticalingredients (APIs) in comparison with current requirements contained in pharmacopeia.By usage of many modern analytical methods the conception of monitoring the changesof APIs during initial stage of their exposure to harmful factors has been developed. Newknowledge must be acquired in terms of identification of each degradation...
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Characterization of the Physical, Chemical, and Adsorption Properties of Coal-Fly-Ash–Hydroxyapatite Composites
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Identification of Novel Chemical Scaffolds Inhibiting Trypanothione Synthetase from Pathogenic Trypanosomatids
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Scaffolds Loaded with Dialdehyde Chitosan and Collagen—Their Physico-Chemical Properties and Biological Assessment
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Chemical modification of tannins from Acacia mearnsii to produce formaldehyde free flocculant
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Characteristics, Chemical Modification Processes as well as the Application of Silica and its Modified Forms
PublicationThe variety of chemical modifications of the surface of silica and its modified forms cause thesematerials to find a consistently wider scope of application. In the publication, the characteristicsof silica, silica gel, aerogel and xerogel are presented. The obtainment, application and propertiesof these materials are discussed. Methods of chemical modifications of surface structures withthe use of different chemical compounds...
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Effect of chemical composition and microstructure on mechanical properties of BA1055 bronze sand castings.
PublicationW pracy wykazano, że nawet małe zmiany w składzie chemicznym brązu aluminiowego BA1055 mają istotny wpływ na strukturę i właściwości mechaniczne odlewów. Określono wpływ wydzieleń międzymetalicznej fazy κ na właściwości odlewów z brązu BA1055 stosowanego na pędniki okrętowe.
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Optical and chemical characterization of thin TiNx films deposited by DC-magnetron sputtering
PublicationThin titanium nitride (tinx) films were deposited on silicon substrates by means of a reactive dc-magnetron plasma. Layers were synthesized under various conditions of discharge power and nitrogen flows in two operation modes of the magnetron (the so-called "balanced" and "unbalanced" modes). The optical constants of the tinx films were investigated by spectroscopic ellipsometry (se). X-ray photoelectron spectroscopy (xps) was...
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A Comprehensive Review on Shilajit: What We Know about Its Chemical Composition
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Preparation and characterization of silk fibroin/collagen sponge modified by chemical cross-linking
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INFLUENCE OF THE INTERMOLECULAR INTERACTION ON PHYSICO-CHEMICAL PROPERTIES OF CHITOSAN/HYALURONIC ACID BLENDS
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The Effects of Cross-Link Density and Chemical Exchange on Magnetization Transfer in Polyacrylamide Gels
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The Impact of Effective Microorganisms on Flesh Color and Chemical Composition of Raw Potato Tubers
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Influence of Hydrogenation on Morphology, Chemical Structure and Photocatalytic Efficiency of Graphitic Carbon Nitride
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Chemical, thermal and laser processes in recycling of photovoltaic silicon solar cells and modules
PublicationIn recent years, photovoltaic power generation systems have been gaining unprecedented attention as an environmentally beneficial method to solve the energy problem. From the economic point of view the pure silicon, which can be recapture from the used cells, is the most important material due to its cost and shortage. In the paper selected methods of used or damaged module and cells recycling and experimental results are presented....
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Anion recognition by phosphonium calix[4]arens: synthesis and physico-chemical studies
Publicationp-tert-butylcalix[4]arenes in the cone conformation, di-and tetra substituted at the narrow rim with charged phosphonium groups have been synthesies and characterised.
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Determination of the chemical structure of potencial organic impurities occuring in the drug substance opopramol
PublicationThe tricyclic antipsychotic and antidepressant drug opipramol was examined with regard to the chemical structure of its organic impurities. Impurities were isolated from the technical product by chromatographic methods and their chemical structures were estabilished by HMNR, MS and FTIR.
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Raman Spectra Measurements for Chemical Identifications - Aspect of Uncertainty Sources and Reduction of Their Effects
PublicationRaman spectrometers enable fast and non-contact identification of examined chemicals. These devices measure Raman spectra and compare with the spectra database to identify unknown and often illicit chemicals (e.g. drugs, explosives) usually without any sample preparation. Raman spectra measurements are a challenge due to noise and interferences present outside the laboratories (field applications). The design of a portable Raman...