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Environmental management concepts supported by information technology

Environmental management concepts supported by information technology

The genesis and development of environmental management concepts are presented. An overview of the current environmental management ideas, programmes and systems, including Sustainable Development, Responsible Care, Cleaner Production, environmental management based on ISO 14000, and EMAS is provided. Selected computer-aided tools and techniques for improving the quality of environmental management are proposed.

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Evaluation of ground pollution by hydrocarbons using Rock-Eval pyrolysis

sediments. Org. Geochem. 86, 71–80. DOI: 10.1016/j.orggeochem.2015.06.009. 13. Carrie, J., Sanei, H. & Stern, G. (2012). Standardisation of Rock-Eval pyrolysis for the analysis of recent sediments and soils. Org. Geochem. 46, 38–53. DOI: 10.1016/j.orggeochem.2012.01.011. 14. Hetényi, M. & Nyilas, T. (2014). Soil organic matter characterization using S3 and S4 signals from Rock-Eval pyrolysis. Pedosphere 24(5), 563–574. 15. Hetényi, M., Nyilas, T. & Toth, T.M. (2005). Stepwise Rock-Eval pyrolysis as a tool for typing heterogeneous organic matter in

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Transient expression of green fluorescent protein in parasitic dodder as a tool for studying of cytoskeleton

Abstract

Dodder (Cuscuta) species cause severe agricultural damage in many countries throughout the world. To establish strategies for control of its growth and spreading it is important to study its life cycle and survival strategies. For these efforts genetic modification would represent a powerful tool. Here we report on Agrobacteriummediated transformation of dodder using green fluorescent protein (GFP) fused to actin-binding protein as a vital marker. Since the shoot of germinating C. europaea contains a functional apical meristem and grows quickly comparing to the root-like structure, the shoot apex was used here as explant. The transgene expression was only transient, nevertheless it enabled to detect allocation of actin filaments and studying the cytoskeleton organization in dodder shoot apex. Transient expression of GFP appears to be a suitable method for studying Cuscuta development through cytoskeleton organisation that is presently largely unexplored.

Open access
The Effects of Combinatorial Chemistry and Technologies on Drug Discovery and Biotechnology – a Mini Review

-41. MORTIER, J., RAKERS, C., FREDERICK, R., WOLBER, G.: Computational tools for in silico fragment-based drug design. Curr. Top. Med. Chem., 12, 2012, 1935-1943. NAIK, A. D., MENEGATTI, S., GURGEL, P. V., CARBONELL, R. G.: Performance of hexamer peptide ligands for affinity purification of immunoglobulin G from commercial cell culture media. J. Chromatogr. A, 1218, 2011, 1691-700. NIXON, A.E.: Phage Display as a Tool for Protease Ligand Discovery. Curr. Pharm. Biotechnol., 3, 2002, 1-12. NOPPE, W., PLIEVA, F. M., GALAEV, I. Y

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CFD modelling of hydrogen starvation conditions in a planar Solid Oxide Fuel Cell

Abstract

The aim of this study was to highlight the interest of using CFD technique as a diagnostic tool of a malfunctioning Solid Oxide Fuel Cells. Hydrogen starvation of a SOFC due to nitrogen dilution is one of the cell dysfunctions and can lead to its degradation. Identification of the starvation point allows to improve cell performance and establish the best conditions for degradation tests. To illustrate a potential of the CFD tool, several simulations of a single planar SOFC and its behaviour under hydrogen starvation were performed and analysed. The results showed that at lower cell voltage values of 0.3 and 0.5 V significant gradients in the electric current were noticed due to a local reduction in hydrogen concentration. The CFD analysis allowed defining desirable mass flow rate of hydrogen to SOFCs to avoid fuel starvation. The model constitutes a helpful tool for optimizing cell design and operational conditions.

Open access
Mechanical properties evaluation and ultrasound diagnosis of unsaturated polyester-glass pipes

Abstract

The purpose of the present work was the elaboration of research methodology of the exhaustion degree of performance properties of pipes based on unsaturated polyester and glass fibers, which were manufactured by the cross winding method on a poly(vinyl chloride) core. Within the frame of the work we conducted fatigue-ageing tests being the simulation tool of the degradation process of polyester-glass pipes. Diagnosis of the composite material condition was conducted with the use of nondestructive ultrasonic testing with the application of the echo method, in which the transition time of ultrasonic wave was determined as the identifying parameter. The registered transition time of ultrasonic wave allowed the identification of the material condition during the course of pipes exploitation.

Open access
Model development of integrated CPOx reformer and SOFC stack system

Abstract

The main purpose of this study was to develop a mathematical model, in a steady state and dynamic mode, of a Catalytic Partial Oxidation (CPOx) reformer – Solid Oxide Fuel Cell (SOFC) stack integrated system in order to assess the system performance. Mass balance equations were written for each component in the system together with energy equation and implemented into the MATLAB Simulink simulation tool. Temperature, gas concentrations, pressure and current density were computed in the steady-state mode and validated against experimental data. The calculated I–V curve matched well the experimental one. In the dynamic modelling, several different conditions including step changes in fuel flow rates, stack voltage as well as temperature values were applied to estimate the system response against the load variations. Results provide valuable insight into the operating conditions that have to be achieved to ensure efficient CPOx performance for fuel processing for the SOFC stack applications.

Open access
Statistical modeling of copper losses in the silicate slag of the sulfide concentrate smelting process

Abstract

This article presents the results of the statistical modeling of copper losses in the silicate slag of the sulfide concentrates smelting process. The aim of this study was to define the correlation dependence of the degree of copper losses in the silicate slag on the following parameters of technological processes: SiO2, FeO, Fe3O4, CaO and Al2O3 content in the slag and copper content in the matte. Multiple linear regression analysis (MLRA), artificial neural networks (ANNs) and adaptive network based fuzzy inference system (ANFIS) were used as tools for mathematical analysis of the indicated problem. The best correlation coefficient (R2 = 0.719) of the final model was obtained using the ANFIS modeling approach.

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Uncertainty analysis of the kinetic model of natural gas combustion in IC Engine

References Rabitz, H., Kramer, M. & Dacol, D. (1983). Sensitivity analysis in chemical kinetics. Annals of Rev. Phys. Chem. 34, 419-461. Turianyi, T. (1990) Sensitivity analysis of complex kinetic systems: tools and applications. J. Math. Chem. 5, 203-248. Radhakrishnan, K. (1990). Numerical approaches to combustion modelling. In Progress in Astronautics and Aeronautics, vol. 135, pp. 83-128, eds Oran E. S., and Boris J. P. AIAA, Washington

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CFD modelling of two-phase liquid-liquid flow in a SMX static mixer

CFD modelling of two-phase liquid-liquid flow in a SMX static mixer

The paper provides an overview of the application of Computational Fluid Dynamics tools for predicting transport processes in two-phase flow in a SMX static mixer. The overview is achieved by taking a brief look at factors: mesh generation, development of sub-models, post-processing including validation and quantitative verification of CFD results with experimental data. Two types of numerical approach were used in the simulations: the Reynolds averaged Navier-Stokes in the steady-state mode with the standard k-??turbulence model and Large Eddy Simulations in the unsteady mode. Both CFD techniques were applied to calculate flow velocities, pressure drop and homogenisation level in a SMX static mixer of the liquid-liquid mixture. The steady state drop size distribution was obtained by implementation procedure containing the population balance equation, where transport equations for the moments of the drop size distribution are solved and the closure problem is overcome by using the Quadrature Method of Moments.

Open access