Search results

Filters

  • Journals
  • Autorzy
  • Contributor
  • Słowa kluczowe
  • Data
  • Type

Search results

Number of results: 253
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

There are approximately 15 million users of system heat in Poland, but unfortunately nearly 70% of the fuel used in heat production is fossil fuel. Therefore, the CO2 emission reduction in the heat production industry is becoming one of the key challenges. City Heat Distribution Enterprise Ltd. in Nowy Sącz (Miejskie Przedsiębiorstwo Energetyki Cieplnej sp. z o.o.) has been conducting a self-financed research and development project entitled The use of algae as carbon dioxide absorbers at MPEC Nowy Sącz. The project deals with postcombustion CO2 capture using Chlorella vulgaris algae. As a result of tests conducted in a 1000 l hermetic container under optimal temperature and light conditions, the recovery of biomass can be performed in weekly cycles, yielding approximately 25 kilograms of biomass per year. Assuming that half of the dry mass of the algae is carbon, it can be said that 240 grams of carbon is bound in one cycle, which, converted to CO2, gives 880 grams of this gas. Our results showed that around 45.8 kilograms of CO2 per year was absorbed. Additionally, it is possible to use waste materials and by-products of technological processes as a nutrient medium for algae
Go to article

Bibliography

  1. Bordignon, M. & Gamannossi degl’Innocenti, D. (2023). Third Time’s a Charm? As-sessing the Impact of the Third Phase of the EU ETS on CO2 Emissions and Performance. Sustainability, 15(8), 6394. DOI:10.3390/su15086394
  2. Brożyna, J., Strielkowski, W. & Zpěvák, A. (2023). Evaluating the Chances of Implementing the “Fit for 55” Green Transition Package in the V4 Countries. Energies, 16(6), 2764. DOI:10.3390/en16062764
  3. Chłopek, Z., Lasocki, J., Melka, K. & Szczepański, K. (2021). Equivalent Carbon Dioxide Emission in Useful Energy Generation in the Heat-generating Plant – Application of the Carbon Footprint Methodology. Journal of Ecological Engineering, 22(2), pp. 144–154. DOI:10.12911/22998993/130891
  4. Daliry, S., Hallajisani, A., Mohammadi Roshandeh, J., Nouri, H. & Golzary, A. (2017). Investigation of optimal condition for Chlorella vulgaris microalgae growth. Global Journal of Environmental Science and Management, 3(2), pp. 217–230. DOI:10.22034/gjesm.2017.03.02.010
  5. Dyachok, V., Mandryk, S., Huhlych, S. & Slyvka, M. (2020). Study of the Impact of Activators in the Presence of an Inhibitor on the Dynamics of Carbon Dioxide Absorption by Chlorophyll-Synthesizing Microalgae. Journal of Ecological Engineering, 21(5), pp. 189–196. DOI:10.12911/22998993/122674
  6. Dyachok, V., Mandryk, S., Katysheva, V. & Huhlych, S. (2019). Effect of Fuel Combustion Products on Carbon Dioxide Uptake Dynamics of Chlorophyll Synthesizing Microalgae. Journal of Ecological Engineering, 20(6), pp.18–24. DOI:10.12911/22998993/108695
  7. Dziosa, K. & Makowska, M. (2015). The influence of temperature on the growth of biomass of freshwater micro-algae grown in laboratory. Inżynieria i Aparatura Chemiczna, 54(4), pp.152–153. (in Polish)
  8. Erdiwansyah, E., Gani, A., Mamat, R., Mahidin, M., Sudhakar, K., Rosdi, S. M. & Husin, H. (2022). Biomass and wind energy as sources of renewable energy for a more sustainable environment in Indonesia: A review. Archives of Environmental Protection, 48(3), pp. 57–69. DOI:10.24425/aep.2022.142690
  9. Faizal, M., Said, M., Nurisman, E. & Aprianti, N. (2021). Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel. Journal of Ecological Engineering, 22(5), pp. 114–120. DOI:10.12911/22998993/135862
  10. Fawzy, S., Osman, A. I., Mehta, N., Moran, D., Al-Muhtaseb, A. H. & Rooney, D. W. (2022). Atmospheric carbon removal via industrial biochar systems: A techno-economic-environmental study. Journal of Cleaner Production, 371, 133660. DOI:10.1016/j.jclepro.2022.133660
  11. Font-Palma, C., Cann, D. & Udemu, C. (2021). Review of cryogenic carbon capture innovations and their potential applications. C - Journal of Carbon Research, 7(3), 58. DOI:10.3390/c7030058
  12. Iglina, T., Iglin, P. & Pashchenko, D. (2022). Industrial CO2 Capture by Algae: A Review and Recent Advances. Sustainability, 14(7), 3801. DOI:10.3390/su14073801
  13. International Energy Agency. (2023). CO2 Emissions in 2022. https://www.iea.org/reports/co2-emissions-in-2022
  14. Izba Gospodarcza Ciepłownictwo Polskie. (2023). Transformacja i rozwój ciepłownictwa systemowego w Polsce. Raport 2023.
  15. Kammerer, S., Borho, I., Jung, J. & Schmidt, M. S. (2023). Review: CO2 capturing methods of the last two decades. International Journal of Environmental Science and Technology, 20(7), pp. 8087–8104. DOI:10.1007/s13762-022-04680-0
  16. Kozieł, W. & Włodarczyk, T. (2011). Algae – biomass production (a reviev). Acta Agrophysica, 17(1), pp. 105–116. http://www.acta-agrophysica.org/Algae-biomass-production-a-reviev,107203,0,2.html
  17. Kupczak, P. (2021). Energy transformation of medium-sized PECs. Energety-ka Cieplna i Zawodowa, 2, pp. 24–27. https://issuu.com/marfi1976/docs/2_2021_energetyka_issuu (in Polish)
  18. Kupczak, P. (2022). How to save energy resources in times of their shortage? Nowa Energia, 85(4), pp. 30–35. (in Polish)
  19. Liu, L., Xia, M., Hao, J., Xu, H. & Song, W. (2021). Biosorption of Pb (II) by the resistant Enterobacter sp.: Investigated by kinetics, equilibriumand thermodynamics. Archives of Environmental Protection, 47(3), pp. 28–36. DOI:10.24425/aep.2021.138461
  20. Madejski, P., Chmiel, K., Subramanian, N. & Kuś, T. (2022). Methods and Techniques for CO2 Capture: Review of Potential Solutions and Applications in Modern Energy Technologies. Energies, 15(3), 887. DOI:10.3390/en15030887
  21. Matejczyk, M., Kondzior, P., Ofman, P., Juszczuk-Kubiak, E., Świsłocka, R., Łaska, G., Wiater, J. & Lewandowski, W. (2023). Atrazine toxicity in marine algae Chlorella vulgaris and in E. coli lux and gfp biosensor tests. Archives of Environmental Protection, 49(3), 87–99. DOI:10.24425/aep.2023.147331
  22. Metsoviti, M. N., Papapolymerou, G., Karapanagiotidis, I. T. & Katsoulas, N. (2019). Effect of Light Intensity and Quality on Growth Rate and Composition of Chlorella vulgaris. Plants, 9(1), 31. DOI:10.3390/plants9010031
  23. Nord, L. O. & Bolland, O. (2020). Carbon dioxide emission management in power generation. John Wiley & Sons.
  24. Osman, A. I., Hefny, M., Abdel Maksoud, M. I. A., Elgarahy, A. M. & Rooney, D. W. (2021). Recent advances in carbon capture storage and utilisation technologies: a review. Environmental Chemistry Letters, 19(2), pp. 797–849. DOI:10.1007/s10311-020-01133-3
  25. Rogulj, I., Peretto, M., Oikonomou, V., Ebrahimigharehbaghi, S. & Tourkolias, C. (2023). Decarbonisation Policies in the Residential Sector and Energy Poverty: Mitigation Strategies and Impacts in Central and Southern Eastern Europe. Energies, 16(14), 5443. DOI:10.3390/en16145443
  26. Sarwer, A., Hamed, S. M., Osman, A. I., Jamil, F., Al-Muhtaseb, A. H., Alhajeri, N. S. & Rooney, D. W. (2022). Algal biomass valorization for biofuel production and car-bon sequestration: a review. Environmental Chemistry Letters, 20(5), pp. 2797–2851. DOI:10.1007/s10311-022-01458-1
  27. Schwister, K. & Leven, V. (2020). Verfahrenstechnik für Ingenieure: Ein Lehrund Übungsbuch (mit umfangreichem Zusatzmaterial). Carl Hanser Verlag GmbH Co KG.
  28. Sifat, N. S. & Haseli, Y. (2019). A Critical Review of CO2 Capture Technologies and Prospects for Clean Power Generation. Energies, 12(21), 4143. DOI:10.3390/en12214143
  29. Skawińska, A., Lasek, J. & Adamczyk, M. (2014). Study of CO2 removal processes using microalgae. Inżynieria i Aparatura Chemiczna, 53(4), pp. 292–293. (in Polish)
  30. Skompski, S., Kozłowska, A., Kozłowski, W. & Łuczyńsko, P. (2023). Coexistence of algae and a graptolite-like problematical: a case study from the late Silurian of Podolia (Ukraine). Acta Geologica Polonica, 73(2), pp. 115–133. DOI:10.24425/agp.2022.143599
  31. Szatyłowicz, E., Patyna, A., Biłos, Ł., Płaczek, M. & Witczak, S. (2017). Productivity of microalgae Chlorella vulgaris in laboratory condition. Inżynieria Ekologiczna, 18(3), pp. 99–105. DOI:10.12912/23920629/70264
  32. Tleukeyeva, A., Pankiewicz, R., Issayeva, A., Alibayev, N. & Tleukeyev, Z. (2021). Green Algae as a Way to Utilize Phosphorus Waste. Journal of Ecological Engineering, 22(10), pp. 235–240. DOI:10.12911/22998993/142451
  33. Urbina-Suarez, N. A., Barajas-Solano, A. F., Garcia-Martinez, J. B., Lopez-Barrera, G. L. & Gonzalez-Delgado, A. D. (2021). Cultivation of Chlorella sp. for biodiesel production using two farming wastewaters in eastern Colombia. Journal of Water and Land Development, 50. DOI:10.24425/jwld.2021.138169
  34. Urbina-Suarez, N. A., Barajas-Solano, A. F., Garcia-Martinez, J. B., Lopez-Barrera, G. L. & Gonzalez-Delgado, A. D. (2022). Prospects for using wastewater from a farm for algae cultivation: The case of Eastern Colombia. Journal of Water and Land Development, 52, pp. 172–179. DOI:10.24425/jwld.2022.140387
  35. Urząd Regulacji Energetyki. (2022). Thermal energy in numbers. 2021. (in Polish)
  36. Valdovinos-García, E. M., Barajas-Fernández, J., Olán-Acosta, M. de los Á., Petriz-Prieto, M. A., Guzmán-López, A. & Bravo-Sánchez, M. G. (2020). Techno-Economic Study of CO2 Capture of a Thermoelectric Plant Using Microalgae (Chlorella vulgaris) for Production of Feedstock for Bioenergy. Energies, 13(2), 413. DOI:10.3390/en13020413
  37. Xie, K., Fu, Q., Qiao, G. G. & Webley, P. A. (2019). Recent progress on fabrication methods of polymeric thin film gas separation membranes for CO2 capture. Journal of Membrane Science, 572, pp. 38–60. DOI:10.1016/j.memsci.2018.10.049
  38. Yerizam, M., Jannah, A. & Aprianti, N. (2023). Bioethanol Production from Chlorella Pyrenoidosa by Using Enzymatic Hydrolysis and Fermentation Method. Journal of Ecological Engineering, 24(1), pp. 34–40. DOI:10.12911/22998993/156000
  39. Yu, Y., Fang, X., Li, L. & Xu, Y. (2023). Performance and mechanism of Carrousel oxidation ditch and water Spinach wetland combined process in treating water hyacinth (Pontederia crassipes) biogas slurry. Archives of Environmental Protection, 49(1), pp. 39–46. DOI:10.24425/aep.2023.144735
  40. Zhou, W., Wang, J., Chen, P., Ji, C., Kang, Q., Lu, B., Li, K., Liu, J. & Ruan, R. (2017). Biomitigation of carbon dioxide using microalgal systems: Advances and perspectives. Renewable and Sustainable Energy Reviews, 76, pp. 1163–1175. DOI:10.1016/j.rser.2017.03.065
Go to article

Authors and Affiliations

Paweł Kupczak
1
ORCID: ORCID
Sylwester Kulig
1
ORCID: ORCID

  1. Miejskie Przedsiębiorstwo Energetyki Cieplnej sp. z o.o. w Nowym Sączu, Poland
Download PDF Download RIS Download Bibtex

Abstract

On the one hand, shale gas extraction has been portrayed as the future of Poland's energy sector, and on the other, as an undertaking potentially harmful to the natural environment that might spark public protests. Why are opinions on this issue so widely disparate?
Go to article

Authors and Affiliations

Magdalena Sidorczuk
Piotr Stankiewicz

Authors and Affiliations

Dorota Pyć
ORCID: ORCID
Download PDF Download RIS Download Bibtex

Abstract

The article is an introduction to the monographic content of a volume containing articles dedicated to contemporary models of building residential districts in Europe, where the issue of an attractive, beautiful architectural form must integrate the dimension of energy efficiency. Individualism must be subject to flexible regulations so that the current understanding of the concept of spatial order brings with it commonly desirable qualities as an effective strategy against the processes of the city›s sprawl. Attached is the output of the HOPU-S URBACT II project (2007-2013), which became an inspiration for the topic.

Go to article

Authors and Affiliations

Gabriela Rembarz
Download PDF Download RIS Download Bibtex

Abstract

This article addresses the issue of the interpretation of proper names in poetry. The state of research on the functions of proper names in literature is well described, but it is possible to note the lack of a fixed interpretation strategy in poetry which means that, despite little interest in poetry, its researchers often try to propose their own methods of analysis. The authors of the article, who tackle onyms in the poetry of Bruno Jasieński, present their own methodological approach to the matter, based on B. Waldenfels’ concept of the “phenomenology of the alien”.

Go to article

Authors and Affiliations

Magdalena Graf
Paweł Graf
Download PDF Download RIS Download Bibtex

Abstract

The category of expectation constitutes an important element of reflection in many scientific disciplines focusing on man. it is treated in both the categories of expectations inscribed in large social projects (e.g. of utopian nature) and individual expectations which build human daily routine. The article is divided into two parts. in the first, the issues of interpersonal expectations, analysed in the perspective of social psychology and sociology, will be undertaken. what will be explored here are the problems of defining the notion of expectation and the problems of expectations at school, which will be exemplified by the pygmalion effect. The first part is completed with some considerations on the meaning of expectation in sociology, the role of expectations in interaction, and the relations between expecting and social order.

In the second part, the author focuses on the issues of expectations inscribed in utopian projects (“great expectations”). pedagogical utopias and relations between utopias and popularization of normative (formal) or informal pedagogies are subjected to analysis. The author makes here some references to the concept of post-materialistic society, attempting to elicit relations between this type of society and popularization of nonformal pedagogies.

Go to article

Authors and Affiliations

Andrzej Kasperek
Download PDF Download RIS Download Bibtex

Abstract

An analysis of the power system functioning and the behaviors of the energy market participants allows the trends taking place within years to be identified, including these associated with the evolution of the electric energy and power demand profiles. The problems of balancing the peak power demand are of both a short and long term nature, which implies the need for changes in the electricity generation sector. Apart from the existing “silo-type” generation units, the construction of distributed energy sources implemented in the civic formula in the framework of self-sufficient energy communes and energy clusters is becoming increasingly important. Support for these programs is realized both at the legislative level, as well as within dedicated competitions and ministerial activities. The financial support carried out by the National Fund for Environmental Protection and Water Management and the Regional Operational Programs is also noticeable. One of the activities aimed at spreading the idea of clustering was the competition for certified energy clusters, conducted by the Ministry of Energy. The goal of the contest was the promotion and development of the distributed energy sector, which could be used for the improvement of energy security in the local manner and constitute a basis for the knowledge necessary in planning and developing the state’s energy policy. The paper presents a synthetic analysis of the results of the competition for a certified energy cluster from the perspective of planning and operational needs related to the functioning of the power system. Further, the information about the investment plans of new generation capacities, including their breakdown with respect to type, achievable power and costs has been provided. Also, the balancing of the demand for electric energy by own generation within the energy clusters has been characterized for three time perspectives

Go to article

Authors and Affiliations

Maciej Sołtysik
Download PDF Download RIS Download Bibtex

Abstract

The paper presents the results of the energy analysis of the conversion of solar radiation energy into electrical energy in Polish weather conditions. The effect of sunlight and working temperature on the photovoltaic module on its power curve P = f(U) is shown. STC and NOCT conditions are described for which the manufacturers specify the parameters of the photovoltaic modules. The manufacturers of photovoltaic panels should give the PPV = f(E) characteristic for the different values of the operating temperature of the modules. An analysis of the economic efficiency of a photovoltaic power plant investment of 1 MWp taking the current legal regulations for the three variants into account was presented. Variant I – the investor benefits from the support of public aid of operational only, Variant II – the investor benefits from the support of public aid for investment in the amount of PLN 1 million, Variant III – the investor benefits from the support of public aid for investment in the amount of PLN 2 million. For all variants, indicators for assessing the economic effectiveness of the investment and the value of the auction price from the maximum price to the price at which the project loses its profitability are determined.

Go to article

Authors and Affiliations

Bartosz Ceran
Radosław Szczerbowski
Download PDF Download RIS Download Bibtex

Abstract

In the text, a polemic is undertaken against the model of the child expected in Polish institutions of early childhood education, and which appropriates the rationalities producing social practices. The source of this model is in the logic of standardization whose cognitive and effects on identity are criticized by the author. Identifying the sources of validation of the practices normalizing some children and stigmatizing others, who do not meet the requirements of the cognitively rigid and morally trivialized standards, the text points to developmental psychology as a discipline which potentially triggers this form of oppression. In conclusion, the author describes briefly a number of examples of educational solutions in which an attempt has been made to move beyond the discourse of standardized quality in child education.

Go to article

Authors and Affiliations

Dorota Klus-Stańska
Download PDF Download RIS Download Bibtex

Abstract

At the early stage of information system analysis and design one of the challenge is to estimate total work effort needed, when only small number of analysis artifacts is available. As a solution we propose new method called SAMEE – Simple Adaptive Method for Effort Estimation. It is based on the idea of polynomial regression and uses selected UML artifacts like use cases, actors, domain classes and references between them. In this paper we describe implementation of this method in Enterprise Architect CASE tool and show simple example how to use it in real information system analysis.
Go to article

Authors and Affiliations

Dariusz Rafał Augustyn
Lukasz Warchal
Download PDF Download RIS Download Bibtex

Abstract

The global financial and European debt crises exposed the need for a new approach to fiscal modeling to support decision making analytically. With this purpose, in the following paper we present a macro-fiscal model. By capturing macro-fiscal interlinkages, especially those between fiscal variables and exchange rates, the model enables to analyze various fiscal scenarios with the focus of its impact on debt sustainability and real sector, as well as to conduct forecasting exercises, for small open economies with potentially large share of foreign currency denominated debt in the overall public debt. Finally, the model is applied to Georgian economy to interpret its’ historical data, provide an optimal policy path for future and analyze debt sustainability under several stress scenarios.

Go to article

Authors and Affiliations

Shalva Mkhatrishvili
Zviad Zedginidze
Download PDF Download RIS Download Bibtex

Abstract

Applying new technologies basing on coal utilization demands precise identification of coal-bed composition. It is suggested, that such possibility is enabled by coal-bed logging with use of - adjusted to this aim - microlithotype analysis. Modification of this research method relies on ten-fold augmentation of 20 point grid size dimensions - up to 500 x 500 [...]. Maceral associations - as identified duringmicroscope observations - are placed in computer database according to their localization in logging. This allows for later graphic interpretation - microlithotype profile drawing. 13 associations has been educed in description, in majority being consistent with commonly used microlithotypes. However, a few changes has been introduced: in description of vitrite, telovitrite, macroscopically recognized in logging as vitrine layers, has been distinguished, as well as detro-gelo-vitrite, macroscopically recognized in logging as durain, while within bimaceralic microlithotypes there has been distinguished: vitrinertite (W), vitrinertite (I), clarite (W), clarite (I), durite (L), durite (I), all on the basis of dominant ingredient named in parenthesis. Accepted research methodology enables precise characteristics of petrographic variation within coal-bed logging. This allows especially to describe variation within dull coal (durain). Basing on research results, it is suggested that the biggest share in seam composition belongs to duroclarite - 23.8%, then vitrite - 18.7% and clarodurite - 17.6%, lower share of few percent belongs to: vitrinertite (I), vitrinertite (W), inertite, clarite (W), vitrinertoliptite, durite (I), durite (L), while both liptite and clarite (L) are less than one percent . Sequence of following microlithotypes also illustrate facies variation, what allows interpretation of environments of peat deposition in paleo-peat bog 116/2. Dominating percentage in log belongs to Forest Moor facies - 33.5%, while the lowest is Forest Terrestial Moor - 12.5%.

Go to article

Authors and Affiliations

Jacek Misiak

Authors and Affiliations

Kazimierz M. Słomczyński
1
ORCID: ORCID
Krystyna Janicka
1
ORCID: ORCID

  1. Instytut Filozofii i Socjologii PAN
Download PDF Download RIS Download Bibtex

Abstract

The effect of total energy consumption and electric energy consumption on cumulated noxiousness index (SWU) value of coke production process, steel rolled goods and PVC windows profiles is presented in the paper. Using the sequential analysis it was proved that in SWU of the prediction process, from the stage of law materials to the final product, the onerousness connected with energy consumption amounts from 70% up to 81%, whereas that connected with electric energy directly or indirectly consumed - from 60% up to 77%.
Go to article

Authors and Affiliations

Agata Malina
Jan Konieczyński
Download PDF Download RIS Download Bibtex

Abstract

A low-dimensional physical model of small-amplitude oscillations of the vocal folds is proposed here. The model is a simplified version of the body-cover one in which mucosal surface wave propagation has been approximated by the seesaw-like oscillation of the vocal fold about its fulcrum point whose position is adjustable in both the horizontal and vertical directions. This approach works for 180 degree phase difference between the glottal entry and exit displacements. The fulcrum point position has a significant role in determining the shape of the glottal flow. The vertical position of the fulcrum point determines the amplitude of the glottal exit displacement, while its horizontal position governs the shape and amplitude of the glottal flow. An increment in its horizontal position leads to an increase in the amplitude of the glottal flow and the time period of the opening and closing phases, as well as a decrease in the time period of the closed phase. The proposed model is validated by comparing its results with the low-dimensional mucosal surface wave propagation model.

Go to article

Authors and Affiliations

Tahir Quresh
Khalid Syed
Download PDF Download RIS Download Bibtex

Abstract

The paper presents the research studies carried out on the reverberation time of rooms, in terms of theoretical aspects and applicability potentials. Over the last century a very large number of scientists have been attempting to work out models describing the reverberation time in enclosed rooms. They have also been trying to apply these models for the description of various acoustic parameters of the interior, i.e. the intelligibility of speech, clarity, articulation, etc. In fact, all these models are based on the Sabine’s statistical method. The paper presents the work of the scientists working on this problem, together with prospective applicability potentials. Such a review may be helpful for researchers, designers or architects involved in the discussed subject.
Go to article

Authors and Affiliations

Artur Nowoświat
Marcelina Olechowska
Download PDF Download RIS Download Bibtex

Abstract

In 2011, over 520 thousand persons worked in hazardous conditions (according to the GUS). Among hazardous factors related to working environment noise was found to be the most common one, threatening 199,6 thousand people (52.9% threats-per-persons related to working environment). The prevalence of workplace noise and increasing awareness of effects of its impact on the human body causes increase of the demand for knowledge of the methods of noise reduction. Due to the lack of knowledge concerning the proper use of hearing protectors, effective noise exposure in the real world may be about a dozen dB higher than the declared assumed protection value. For this reason, in Central Institute for Labour Protection - NRI “The interactive system for learning the correct use of hearing protectors” has been developed. The system includes a multimedia guide on hearing protectors supplemented by video tutorials, training materials with training hearing protectors, and software for evaluation of the activities of the trainee.
Go to article

Authors and Affiliations

Paweł Górski
Download PDF Download RIS Download Bibtex

Abstract

The purpose of the present work was to estimate the effectiveness of grapefruit extract and Pythium oligandrum in protection of common bean, runner bean and pea from soil-borne pathogenic fungi. The investigated preparations were used for seed dressing and spraying plants at the beginning of anthesis. The results pointed out that the applied products considerably improved emergence, healthiness and yielding of the examined plant species. Besides, Biosept 33 SL showed a better effect than Polyversum. Independently on the species, the fewest plants, with the greatest proportion of infected ones and the smallest yield of seeds were obtained from the untreated control. Alternaria alternata, Fusarium spp., Pythium irregulare, Rhizoctonia solani and Sclerotinia sclerotiorum were frequently isolated from infected roots and stem bases as well as from seeds of bean and pea. Fusarium oxysporum tuned out to be dominant. The proportion of the above listed fungi in the treatments with Biosept 33 SL or Polyversum was smaller than in the control. At the same time, the role of those fungi in infecting the plants of common bean, runner bean and pea treated with Biosept 33 SL was only a little smaller than after using Polyversum.

Go to article

Authors and Affiliations

Elżbieta Patkowska
Download PDF Download RIS Download Bibtex

Abstract

In this study, the spatial variation of daily and monthly concentration precipitation index and its aggressive-ness were used in 23 rainfall stations in the extreme north-east of Algeria over the period 1970–2010. The trend was analysed by the Mann–Kendall (MK) test. The results show that daily precipitation concentration index (CI) values are noticeably higher in places where the amount of total precipitation is low, the results of MK test show that areas of high precipitation concentration tend to increase. The seasonality and aggressiveness of precipita-tion are high in the eastern and western parts of the study region (eastern and central coastal of Constantine catchments), whereas a moderately seasonal distribution with low aggressiveness is found in the middle of the study area (plains and central Seybouse catchment). As a result, the modified Fournier index (MFI) has a signifi-cant correlation with annual precipitation, whereas the CI and monthly precipitation concentration index (PCI) show an opposite correlation in relation to annual precipitation.
Go to article

Authors and Affiliations

Hanane Bessaklia
Abderrahmane Nekkache Ghenim
Abdessalam Megnounif
Javier Martin-Vide
Download PDF Download RIS Download Bibtex

Abstract

The situation when groundwater considerably rises above the “normal” level, water intake, lowering of groundwater levels and other relevant practical tasks require the drainage facilities. The most effective techniques of numerical studies of the corresponding boundary problems at present time are methods of dealing with inverse boundary value problems (conformal and quasi-conformal mappings). As basis of this research we used the case of combining the fictitious domain methods with quasi-conformal mappings of the solution of nonlinear boundary value problems for the calculation of filtra-tion regimes in environments with free boundary areas (depression curves) and zones of “mountainous” areas. This paper reviews the stationary issue of flat-vertical stationary non-pressure liquid filtration to horizontal symmetric drainage. In the paper a practical methodology for solving boundary value problems on conformal mappings is suggested for the calculation of the filtration process in the horizontal symmetrical drainage. The idea of block iterative methods was used during the creation of the corresponding algorithm which is based on the alternating “freeze” of the anticipated conformance parameter, the internal and boundary connections of the curvilinear area. The results of the conducted numerical calculations confirmed the effectiveness of the suggested problem formulations and algorithms of their numerical solution and the possibility of their use in the modelling of nonlinear filtration processesoccurring in horizontal drainage systems, as well as in the design of drainage facilities and optimizing other hydrosystems. Therefore these results are of great importance.

Go to article

Authors and Affiliations

Andrii Bomba
Mykola Tkachuk
Volodymyr Havryliuk
Ruslan Kyrysha
Ievgenii Gerasimov
Oleg Pinchuk
Download PDF Download RIS Download Bibtex

Abstract

The enzymatic synthesis of a highly hydrophobic product (dipeptide precursor) in which the reaction is accompanied by the mass transfer of the reaction product to the organic phase and the substrates to the water phase is considered. Equations describing both continuous and batch processes are formulated. The range of variability in the operating parameters of such a bioreactor is specified, and the correlations reported in the literature to describe mass transfer in the membrane contactor are validated. The proposed process was verified experimentally, and good agreement between the determined and calculated concentrations was obtained in both phases.

Go to article

Authors and Affiliations

Andrzej Noworyta
Anna Trusek-Holownia

This page uses 'cookies'. Learn more