14 (2008) Scientific papers, Series A
Permanentní URI k tomuto záznamuhttps://hdl.handle.net/10195/38124
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Článek Otevřený přístup peer-reviewedpublished Material flow cost accounting. "Only" a tool of environmental management or a tool for the optimization of corporate production processes?(Univerzita Pardubice, 2009) Hyršlová, Jaroslava; Bednaříková, Marie; Hájek, MiroslavEnvironmental Management Accounting (EMA) is considered to be a system providing information to support decision-making mainly within the framework of environmental management. EMA includes also Environmental Cost Accounting which uses an extensive range of methods. Of major significance for the management of corporate processes are primarily the methods based on material and energy flows. The paper focuses on Material Flow Cost Accounting (MFCA). It characterizes MFCA not only as a tool of environmental management, but mainly as a tool for the management of material flows and points out the significance of MFCA information for the optimization of production processes. The paper also includes selected results of research activities focusing on EMA and MFCA application in the Czech Republic.Článek Otevřený přístup peer-reviewedpublished Programs for teaching of optimization methods(Univerzita Pardubice, 2009) Javůrek, Milan; Taufer, Ivan; Čermák, JosefThe paper presents two programs for teaching methods of non-linear programming. The model example is a chemical reactor in which a consecutive or reversible reaction takes place. The student's task consists in finding the optimum regime for the reactor, where according to the algorithm of search of the chosen method the independent variable is introduced and the program computes the gradually stabilizing regulated quantity, i.e. the dependent variable. The individual variables are loaded with generated random error, which brings the model closer to real situations.Článek Otevřený přístup peer-reviewedpublished Wall effects on a single spherical particle moving through a power-law fluid(Univerzita Pardubice, 2009) Strnadel, Jaroslav; Machač, IvanThe steady motion of solid spheres through a power-law fluid contained in a cylindrical tube has been solved numerically using a finite element method by means of the COMSOL software package for the steady non-Newtonian flows. From the resulting stress fields, the drag force on the sphere, drag coefficient, drag coefficient corrective factor, and wall correction factor have been evaluated in dependence on the fluid power law index and the sphere-to-tube diameter ratio. The results of numerical computation are in very good agreement with previous theoretical and experimental literature data, which documents suitability of the computational method used.Článek Otevřený přístup peer-reviewedpublished Effect of physicochemical conditions on crossflow microfiltration of mineral despersions using ceramic membranes(Univerzita Pardubice, 2009) Mikulášek, Petr; Velikovská, Pavlína; Horčičková, JanaThis paper studies the influence of dispersion pH, ionic strength, and coagulant type on ceramic membrane microfiltration of TiO2 dispersions. A series of crossflow microfiltration experiments were carried out at various pH values, ionic strengths and with various multivalent inorganic salts. The filtration behaviour was analyzed based on measurements of zeta potential of alumina membrane and TiO2 particle and particle size distribution of the TiO2 suspension. The results show that inorganic anions affect the microfiltration of TiO2 dispersion by changing the surface properties of both the alumina membrane and TiO2 particle. The solution environment affects the dispersion of TiO2 particles and plays a major role in the filtration flux.Článek Otevřený přístup peer-reviewedpublished Colour properties of (Bi2O3)1-x(Lu2O3)x pigments(Univerzita Pardubice, 2009) Proklešková, Eva; Šulcová, Petra; Bystrzycki, Pavel(Bi2O3)1-x(Lu2O3)x solid solutions were synthesized as new inorganic yellow and orange pigments and their colour properties were investigated as possible ecological materials. The host lattice of these pigments is Bi2O3 that is doped with LuČlánek Otevřený přístup peer-reviewedpublished Study of ceramic pigments based on Dy2Sn2-xVxO7(Univerzita Pardubice, 2009) Šulcová, Petra; Fukalová, Pavla; Válek, Lukáš; Trojan, MiroslavNew high-stability yellow ceramic pigments based on pyrochlore solid solutions Dy2Sn2-xVxO7 were developed employing conventional solid-state reaction synthesis. The synthesis of these colourants involved high-temperature calcination of starting oxides and optimum conditions for their synthesis were determined. The pigments were evaluated from the standpoint of their structure, colour and ability to colour ceramic glazes.Článek Otevřený přístup peer-reviewedpublished Catalytic behaviour of VMoOx catalysts supported on hexagonal mesoporous silica in partial oxidation of butane(Univerzita Pardubice, 2009) Setnička, Michal; Čičmanec, Pavel; Pouzar, Miloslav; Adam, JiříČlánek Otevřený přístup peer-reviewedpublished Structure of tri-n-butyltin hydroxyacetate(Univerzita Pardubice, 2009) Chalupa, Jan; Padělková, Zdeňka; Růžička, AlešThe structure of tri-n-butyltin derivative of hydroxyacetic acid was prepared and structurally characterized by X-ray crystallographic techniques in the solid state. This compound reveals linear polymeric structural character with five-coordinated tin atoms. Coordination geometry of tin atoms is trigonal bipyramidal with all three carbon atoms in equatorial positions, monodentatelly bonded carboxylic oxygen and the hydroxo oxygen atom from the adjacent molecule in the axial positions forming thus the linear chain. Two independent molecules/chains are nearly perpendicularly oriented and interconnected by H-bonding by OH group from one chain to uncoordinated oxygen of carboxylic group of second chain in the crystal lattice.Článek Otevřený přístup peer-reviewedpublished Nano/meso-scale separation in some Ge-As-S glasses and amorphous films(Univerzita Pardubice, 2009) Knotek, Petr; Kincl, Miloslav; Tichý, LadislavAtomic force microscopy (AFM) and atomic force acoustic microscopy (AFAM) is used for examination of the role of annealing and illumination of flexible network of Ge0.12As0.17S0.71 amorphous film and rigid network of Ge0.25As0.30S0.45 amorphous film. The virgin state of both films appears to be smooth with the value of smoothness Sa at around 0.8 nm. Annealing leads to changes in topological smoothness (Sa increased up to 5nm in case of S-rich film) attributed to a nano/meso phase separation associated, most probably, with sulfur aggregation in the case of Ge0.12As0.17S0.71 and arsenic aggregation in the case of Ge0.25As0.30S0.45 amorphous film. Illumination of virgin Ge0.12As0.17S0.71 amorphous film leads to less pronounced but similar results as obtained by annealing, while rigid Ge0.25As0.30S0.45 amorphous film is insensitive to used illumination.Článek Otevřený přístup peer-reviewedpublished Simplified electrophoretic separation of amyloid-ß peptides(Univerzita Pardubice, 2009) Zdražilová, Pavla; Holub, Dušan; Bílková, ZuzanaSeveral variants of amyloid-ß peptides, differing in their carboxy terminus, have been identified as the major component of cerebral deposits of amyloid found in the brains of patients with Alzheimer's disease. Recently, we have refined a simple and inexpensive method for analysis and separation of amyloid-ß peptides based on modification of discontinuous SDS-PAGE electrophoresis with utilization of Tricine as a trailing ion. Clear resolution was achieved by addition of high concentration of urea to the separation and stacking gel. The obtained data confirmed that described gel electrophoretic system is a superior procedure for the analysis of amyloid-ß peptides providing enhanced resolution even for peptides which differ only in few amino acids in the length of polypeptide chain.