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Search results for: Environmental analysis
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Selections and approximations of convex-valued equivariant mappings
PublicationUdowodniono szereg twierdzeń o współzmienniczych selekcjach i aproksymacjach ciągłych, mierzalnych i typu Caratheodory'ego dla odwzorowań G-współzmienniczych o wartościach wypukłych, gdzie G jest grupą zwartą Liego. Tw. typu Michaela, Celliny, Browdera, Kuratowskiego-Ryll-Nardzewskiego, Castaing itd.
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On parameter derivatives of the associated Legendre function of the first kind (with applications to the construction of the associated Legendre function of the second kind of integer degree and order)
PublicationZnaleziono cztery nowe wyrażenia dla pochodnej stowarzyszonej funkcji Legendre'a pierwszego rodzaju względem jej stopnia w przypadku, gdy rząd i stopień są liczbami naturalnymi. Wyniki wykorzystano do podania nowych wyrażeń dla stowarzyszonych funkcji Legendre'a drugiego rodzaju z naturalnymi rzędem i stopniem.
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Thermal analysis and static strength of polyurethanes obtained from glycolysates
PublicationPrzeprowadzono analizę termiczną i zbadano właściwości wytrzymałościowe poliuretanów otrzymanych z glikolizatów o różnej budowie chemicznej. Glikolizaty pozyskiwano w procesie recyklingu surowcowego odpadów poliuretanowych o niskiej gęstości. Środkiem glikolizującym był propano-1,3-diol. Poliuretany z glikolizatów syntezowano metodą prepolimerową z MDI i BDO jako przedłużacza łańcuchów. Nie stosowano katalizatorów.
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Conley type index applied to Hamiltonian inclusions
PublicationPodano dowód istnienia nietrywialnych rozwiązań okresowych dla inkluzji Hamiltonowskich, z potencjałem lokalnie Lipschitzowskim, okresowym, uogólniając klasyczne twierdzenie Ammana- Zehndera. Użyto techniki z teorii indeksu Conley'a dla wielowartościowych potoków w przestrzeni Hilberta.
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Properties of polyamide 6 and thermoplastic polyurethane blends containing modified montmorillonites
PublicationAnalizie poddano nowy rodzaj mieszanin polimerowych poliamidu 6 z termoplastycznymi elastomerami poliuretanowymi. Mieszaniny wzmocniono poprzez dodatek organicznie modyfikowanych montmorylonitów (Cloisite). Uzyskane układy przebadano metodami termicznymi, dyfrakcyjnymi oraz scharakteryzowano podstawowe właściwości mechaniczne.
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Thermal analysis of copper(II) complexes of general formula [Et4N]2[CuBrnCl4-n]
PublicationBadano dekompozycję termiczną związków składających sie z anionów: [CuBrnCl4-n]2- (n=0-4) i kationów tetrametyloamoniowych. Stosowano następujące metody badawcze: TG-FTIR, TG-MS, DTA i DTG. Pomiary przeprowadzono w atmosferze argonu i powietrza w zakresie temperatur od 293 K do 1073 K. Produkty dekompozycji identyfikowano metoda spektroskopii w podczerwieni (IR i FIR) oraz metodą dyfrakcji promieniowania rentgenowskiego.
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Almost homoclinic solutions for the second order Hamiltonian systems
PublicationW niniejszej pracy badam istnienie rozwiązań prawie homoklinicznych (almost homoclinic) dla układu Hamiltona rzędu drugiego (układu Newtona): ü(t) + V_{u}(t,u) = f(t), gdzie t є R, u є R^{n}, V(t,u) = -K(t,u) + W(t,u), K,W: R x R^{n} → R są klasy C^{1}, K spełnia warunek ''pinching'', W_{u}(t,u)=o(|u|), gdy |u| → 0 jednostajnie względem t, f: R → R^{n} jest funkcją ciągłą, niezerową i odpowiednio małą w L^{2}(R,R^{n}). Przy tych...
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Dynamic mechanical properties and thermal degradation process of the compositions obtained from unsaturated poly(ester urethanes) cross-linked with styrene
PublicationW pracy przedstawiono właściwości dynamiczno-mechaniczne oraz stabilność termiczną poli(estro uretanów) sieciowanych styrenem. Badane poli(estro uretany) syntetyzowano z nienasyconych oligomeroli opartych na cis-2-buten-1,4-diolu oraz 4,4`-diizocyjanianie difenylometanu. Wyniki badań dynamicznych właściwości mechanicznych otrzymanych poliuretanów potwierdziły separację fazową uzyskanych kompozycji. W pracy przedstawiono również...
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Thermal decomposition of some aromatic azomonoethers. Part II. Non-isothermal study of three liquid crystals in dynamic air atmosphere
PublicationW ramach pracy zweryfikowano stabilność termiczną trzech barwników azowych o właściwościach ciekłokrystalicznych - potencjalnych prekursorów do otrzymywania warstw stosowanych w optyce nieliniowej. Zarejestrowano przebiegi TG, DTG, DTA oraz DSC jak również analizowano skład gazów powstających podczas rozpadu za pomocą przystawki FTIR. Przeprowadzono analizę kinetyki rozkładu, wyznaczając energię aktywacji procesu.
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Hydrothermal, microwave and mechanochemical modification of amorphous zirconium phosphate structure
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Structural and thermal characteristics of Ni-doped carbosils prepared by mechanochemistry
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Structural, thermal and energetic characteristics of synthetic active carbons prepared on the basis of ion-exchange resin Amberlite IRC 84
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Active carbons from waste biochars
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Swelling effects in cross-linked polymers by thermogravimetry
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Characteristics of thermal behavior of photoluminescent copolymers studied by the TG/DTG/FTIR coupled method
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Adsorption and calorimetric studies of hydrothermally modified carbosils
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Modification of titanium phosphate precipitated from titanylsulfate
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Complex investigations of structural and thermal properties of silica-titania adsorbents
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Carbon–silica gel adsorbents
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PLE in the analysis of plant compounds
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Application of differential scanning calorimetry to study porous structure of hydrothermally modified silicas
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PLE in the analysis of plant compounds
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New sorbent materials for selective extraction of cocaine and benzoylecgonine from human urine samples
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In honor of the 70th birthday of Professor Roman Kaliszan
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Combined computational-experimental approach to predict blood–brain barrier (BBB) permeation based on “green” salting-out thin layer chromatography supported by simple molecular descriptors
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The metabolic profiles of pterin compounds as potential biomarkers of bladder cancer—Integration of analytical-based approach with biostatistical methodology
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Determination of pterins in urine by HPLC with UV and fluorescent detection using different types of chromatographic stationary phases (HILIC, RP C8, RP C18)
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Simultaneous determination of creatinine and acetate by capillary electrophoresis with contactless conductivity detector as a feasible approach for urinary tract infection diagnosis
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Robust HPLC–MS/MS method for levofloxacin and ciprofloxacin determination in human prostate tissue
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Urine metabolic fingerprinting using LC–MS and GC–MS reveals metabolite changes in prostate cancer: A pilot study
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Altered levels of nucleoside metabolite profiles in urogenital tract cancer measured by capillary electrophoresis
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Preface
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Steroid profiles as potential biomarkers in patients with urogenital tract cancer for diagnostic investigations analyzed by liquid chromatography coupled to mass spectrometry
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Metabolomics for laboratory diagnostics
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Pounding mitigation of a short-span cable-stayed bridge using a new hybrid passive control system
PublicationThis paper investigates the effectiveness of a new hybrid passive control system on the seismic response of an existing steel cable-stayed bridge considering the pounding effect. The proposed hybrid passive control system comprises a seismic isolator and a metallic damper. The bridge is located in a high seismic zone and has suffered several damages including the earthquake-induced pounding damage during the 1988 earthquake....
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The potential role of fatty acids in prostate cancer determined by GC–MS analysis of formalin-fixed paraffin-embedded tissue samples
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Design of Experiments in metabolomics-related studies: An overview
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Analysis of urinary nucleosides as potential cancer markers determined using LC–MS technique
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Development and validation of urinary nucleosides and creatinine assay by capillary electrophoresis with solid phase extraction
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Blood–brain barrier permeability mechanisms in view of quantitative structure–activity relationships (QSAR)
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Metabolomics in cardiovascular diseases
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Identification of lipid fraction constituents from grasshopper (Chorthippus spp.) abdominal secretion with potential activity in wound healing with the use of GC–MS/MS technique
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Increasing conclusiveness of metabonomic studies by cheminformatic preprocessing of capillary electrophoretic data on urinary nucleoside profiles
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Separation of nicotinic acid and its structural isomers using 1-ethyl-3-methylimidazolium ionic liquid as a buffer additive by capillary electrophoresis
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Human red blood cells targeted metabolome analysis of glycolysis cycle metabolites by capillary electrophoresis using an indirect photometric detection method
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Synthesis and characterization of metal polycarboxylates constructed from lanthanides(iii) and 1,2,4,5-benzenetetracarboxylic acid
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Thermal properties of lanthanide(III) complexes with 2-aminoterephthalic ACID
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Quantitative determination of diazepam, nitrazepam and flunitrazepam in tablets using thin-layer chromatography–densitometry technique
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Determination of biogenic amines in processed and unprocessed mushrooms from the Polish market
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Thermal properties of rare earth elements complexes with 1,3,5-benzenetricarboxylic acid
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Particle swarm optimization–artificial neural network modeling and optimization of leachable zinc from flour samples by miniaturized homogenous liquid–liquid microextraction
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Thermal behavior of the highly luminescent poly(3-hydroxybutyrate):Eu(tta)3(H2O)2 red-emissive complex
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Influence of preparation conditions on thermal properties of lanthanide benzenepolycarboxylates
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Thermal properties of lanthanide(III) complexes with 5-amino-1,3-benzenedicarboxylic acid
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Synthesis and thermal characterization of luminescent hybrid composites based on bisphenol A diacrylate and NVP
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The Conley index and spectral sequences
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On the space of equivariant local maps
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Thermal properties of multiblock thermoplastic elastomerswith oligoamide soft blocks derived from dimerized fatty acid
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Spectral sequences and detailed connection matrices
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Influence of chemical composition of amide block on the thermal properties and structure of terpolymers
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Thermal properties of terpoly(ester-b-ether-b-amide)s with aliphatic ester blocks
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Silicone pressure-sensitive adhesives with increased thermal resistance
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Cadmium complex possessing simultaneously silanethiolato- and dithiocarbamato-ligands. A novel single-source precursor of cadmium sulfide
PublicationThermal decomposition of suitable coordination compounds may be used as efficient route for fabrication of semiconducting layers. A new potential CdS precursor—a cadmium complex with all-sulfur Cd-coordination sphere [Cd{l-SSi(OBut)3}(S2CNC4H8)]2 (1) —has been prepared and its properties are investigated. The complex was obtained in the reaction between dimeric bis(tri-tert-butoxysilanethiolato) cadmium(II) [Cd{SSi(OBut)3}2]2 and...
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Synthesis and thermal studies of flexible polyurethane nanocomposite foams obtained using nanoclay modified with flame retardant compound
PublicationThis work presents thermal studies of nanocomposites based on the flexible polyurethane (PU) matrix and filled using montmorillonite organically modified with organophosphorus flame retardant compound. Flexible PU nanocomposite foams were prepared in the reaction carried out between reactive alcoholic hydroxyl and isocyanate groups with the ratio of NCO to OH groups equal to 1.05. The amount of an organoclay ranging from 3 to 9...
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Homoclinic solutions for a class of autonomous second order Hamiltonian systems with a superquadratic potential
PublicationW niniejszej pracy udowodniliśmy istnienie nietrywialnego rozwiązania homoklinicznego dla autonomicznych układów Hamiltona drugiego rzędu z nadkwadratowym potencjałem. Orbitę homokliniczną otrzymaliśmy jako słabą granicę ciągu punktów prawie krytycznych, stosując zasadę minimaks do odpowiedniego funkcjonału akcji oraz prosty argument typu ''concentration-compactness''.
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Comment on the orthogonality of the Macdonald functions of imaginary order
PublicationPrzeprowadzono dowód ortogonalności funkcji Macdonalda z urojonym indeksem. Zastosowana metoda jest znacznie prostsza od innych prezentowanych do tej pory w literaturze.
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Study of thermal property changes of biopol/polyamide 11 blends during biodegradation in compost
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Dynamic mechanical properties and thermal degradation process of the compositions obtainedfrom unsaturated poly(ester urethanes) cross-linked with styrene
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DSC Study of Polyurethanes obtained from 4,4'-Bis(10-Hydroxydecaoxy)biphenyl
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On the theorem of Tverberg
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Borsuk-Ulam type theorems on product spaces II
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Fixed point index for $G$-equivariant multivalued maps
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Thermal behavior of the products of 2-chloro-2-propen-1-ol oligomerization
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The determination of elements in herbal teas and medicinal plant formulations and their tisanes
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Understanding element composition of medicinal plants used in herbalism—A case study by analytical atomic spectrometry
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MgO/CaO-loaded porous carbons for carbon dioxide capture
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Nanosized carbon black as synergist in PP/POE-MA/IFR system for simultaneously improving thermal, electrical and mechanical properties
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Stability by linear approximation for time scale dynamical systems
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Rotating rod and ball
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Thermal stability and degradation of selected poly(alkyl methacrylates) used in the polymer industry
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Uncertainty of antioxidant profiling in complex mixtures using liquid chromatography involving post-column derivatisation
PublicationThe main goal of this paper is to discuss the problems associated with antioxidant profiling in complex samples using a high-throughput HPLC system coupled with post-column derivatisation reactor. Based on the experimental data reported in the literature, we demonstrated that improper optimisation of temperature and/or pH assay conditions performed using an on-line derivatisation reactor may substantially change the antioxidant...
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Structure–bioavailability relationship study of genistein derivatives with antiproliferative activity on human cancer cell
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An algorithmic approach to estimating the minimal number of periodic points for smooth self-maps of simply-connected manifolds
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Silylation of acetaminophen by trifluoroacetamide-based silylation agents
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Selected analytical challenges in the determination of pharmaceuticals in drinking/marine waters and soil/sediment samples
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Bioaccumulation and analytics of pharmaceutical residues in the environment: A review
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Computer assisted method for proving existence of periodic orbits
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Improvement of the resistance to oxidation of the ecological greases by the additives
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Modelling relation between oxidation resistance and tribological properties of non-toxic lubricants with the use of artificial neural networks
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Elemental characteristics of mushroom species cultivated in China and Poland
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Production of gaseous matrix-free reference materials
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Thermodynamics, size, and dynamics of zwitterionic dodecylphosphocholine and anionic sodium dodecyl sulfate mixed micelles
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Quantitative structure-(chromatographic) retention relationship models for dissociating compounds
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Combined pH/organic solvent gradient HPLC in analysis of forensic material
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The simultaneous determination of hydrophobicity and dissociation constant by liquid chromatography–mass spectrometry
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On the interspike-intervals of periodically-driven integrate-and-fire models
PublicationWe analyze properties of the firing map, which iterations give information about consecutive spikes, for periodically driven linear integrate-and-fire models. By considering locally integrable (thus in general not continuous) input functions, we generalize some results of other authors. In particular, we prove theorems concerning continuous dependence of the firing map on the input in suitable function spaces. Using mathematical...
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Thermal and mechanical properties of polyurethanes modified with L-ascorbic acid
PublicationIn this study we report the thermal and mechanical properties of polyurethanes modified with ascorbic acid (AA). Ascorbic acid was used as a modifier at concentration of 1 or 2 mass%. The antioxidative properties of AA may improve the biocompatibility of the obtained materials, which were designed for biomedical applications. In this paper we describe characterization of obtained unmodified and ascorbic acid modified polyurethanes...
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Characterization of metabolites in different kiwifruit varieties by NMR and fluorescence spectroscopy
PublicationIt is known from our previous studies that kiwifruits, which are used in common human diet, have preventive properties of coronary artery disease. This study describes a combination of 1H NMR spectroscopy, multivariate data analyses and fluorescence measurements in differentiating of some kiwifruit varieties, their quenching and antioxidant properties. A total of 41 metabolites were identified by comparing with literature data...
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A Noether theorem for stochastic operators on Schatten classes
PublicationWe prove that a stochastic (Markov) operator S acting on a Schatten class C_1 satisfies the Noether condition S'(A) = A and S'(A^2) = A^2, where A is a Hermitian bounded linear operator on a complex Hilbert space H, if and only if, S(E(G)XE(G)) = E(G)S(X)E(G) holds true for every Borel subset G of the real line R, where E(G) denotes the orthogonal projection coming from the spectral resolution of A. Similar results are obtained...
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Structure analysis and thermal degradation characteristics of bio-based poly(propylene succinate)s obtained by using different catalyst amounts
PublicationLinear bio-based polyester polyols were prepared with the use of succinic acid and 1.3-propanediol (both with natural origin). As a catalyst was used tetraisopropyl orthotitanate (TPT). In order to determine the effect of various catalyst content on the thermal degradation characteristics, three different TPT amounts, as a 1.3-propanediol equivalent, were used, namely 0.1 mass% (PPS-0.1), 0.2 mass% (PPS-0.2) and 0.25 mass% (PPS-0.25)....