Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Saprol 190 EC (triforine) and Rubigan 12 EC (fenarimol) diluted in 6 types of water were applied against rose rust Phragmidium mucronatum Cooke. No adjuvants were added to the emulsion except when the spray mix was made using water from Poznań prepared in 2 variants: with an addition of Citowett AL and without it. Independently on the plant protection product type, efficacy of fungicides diluted in well water from Szczepankowo, Kościan or Śmigiel was better than when they were diluted in water after reversed osmosis. However, no type of water exerted any significant effect on efficacy of the investigated fungicides independently on the year of studies, although, in 1999, a better biological activity was shown by Rubigan 12 EC diluted in water from Kościan and Poznań than when they were diluted in water after reversed osmosis. The fungicides were most effective after addition of Citowett AL, however, a visible effect of this adjuvant showing increased rose protection against rose rust was found only in 1998.

Go to article

Authors and Affiliations

Henryk Ratajkiewicz
Download PDF Download RIS Download Bibtex

Abstract

The article is a case study of the steel milling ring casting of about 6 tonnes net weight. The casting has been cast in the steel foundry the authors have been cooperating with. The aim was to analyse the influence of the shape of the chills and the material which was used to make them on the casting crystallization process. To optimally design the chills the set of the computer simulation has been carried out with 3 chills’ shape versions and 3 material’s versions and the results have been compared with the technology being in use (no chills). The proposed chills were of different thermal conductivity from low to high. Their shapes were obviously dependant on the adjacent casting surface geometry but were the result of the attempt to optimise their effect with the minimum weight, too. The chills working efficiency was analysed jointly with the previously designed top feeders system. The following parameters have been chosen to compare their effectiveness and the crystallization process: time to complete solidification and so-called fed volume describing the casting feeding efficiency. The computer simulations have been carried out with use of MagmaSoft v. 5.2 software. Finally, the optimisation has led to 15% better steel yield thanks to 60% top feeders weight reduction and 40% shorter solidification time. The steel ring cast with use of such technology fulfil all quality criteria.

Go to article

Authors and Affiliations

M. Jaromin
R. Dojka
J. Jezierski
M. Dojka
Download PDF Download RIS Download Bibtex

Abstract

In this work, an assessment and comparison of the quality of selected bentonites and bentonite mixtures was made. The samples consisted of available foundry materials used for bonding green sands. Determining the homogeneity degree and specific surface area of the grains allowed us to compare the examined materials and determine their influence on other parameters. On the basis of a thermal analysis of the bentonites or bentonite mixtures, the changes occurring in the sample during its heating were determined. Determining the potential for ion exchange and montmorillonite content enabled us to assess the binding properties of the materials. The preparation of six green sands with different bentonites or bentonite mixtures gave us the opportunity to assess the changes in apparent density, permeability, compressive strength and friability as a function of humidity, and the impact of different materials on the mentioned parameters. Their charts were analyzed, and the molding sand with the addition of bentonite or a bentonite mixture was selected for which these parameters are favorable. On this basis, the best-presented binding material was assessed and selected.

Go to article

Authors and Affiliations

S. Paź
D. Drożyński
M. Górny
S. Cukrowicz
Download PDF Download RIS Download Bibtex

Abstract

The article presents in a sketch of the history and the state of research of Polish etymological studies from Aleksander Brückner to Wiesław Boryś on the Slavic and Indo‑European background. The paper also discusses the different types of etymological dictionaries and suggests the directions of further research.
Go to article

Authors and Affiliations

Leszek Bednarczuk
1
ORCID: ORCID

  1. Uniwersytet Pedagogiczny, Kraków
Download PDF Download RIS Download Bibtex

Abstract

A hydroponic trial was conducted to study the effect of chloride salinity in simulated effluent on Cd accumulation by tobacco. Leaf surface area (LSA) and root surface area (RSA) measurements were incorporated as possible determinants of Cd uptake rate by plants. Results showed that individual plant differences in Cd content were normalized when including RSA to express Cd uptake rates by plants but not including LSA. A biotic ligand model (BLM) fitted to predict Cd uptake, estimated active and almost linear uptake of the free Cd2+ ion by tobacco plants, while virtually no changes in the chloride complex (CdCl+) uptake were predicted, presumably due to a rapid saturation of the hypothetical root sorption sites at the concentrations used in this trial. Nicotiana tabacum var. K326 is evidenced to be a species potentially suitable for biological wastewater treatment using rhizofiltration at concentrations commonly found in salt-affected wastewater, with high Cd accumulation (185 to 280 mg/kgd.m.) regardless of water salinity and tolerance up to 80 mmol/L NaCl.
Go to article

Bibliography

1. Berkelaar, E., & Hale, B. (2000). The relationship between root morphology and cadmium accumulation in seedlings of two durum wheat cultivars, Canadian Journal of Botany, 78, 3, pp. 381-387. DOI: 10.1139/b00-015
2. Berkelaar, E., & Hale, B. (2003). Cadmium accumulation by durum wheat roots in ligand buffered hydroponic culture: uptake of Cd ligand complexes or enhanced diffusion? Canadian Journal of Botany, 81, 7, pp. 755-763. DOI: 10.1139/b03-061
3. Elouear, Z., Bouhamed, F., & Bouzid, J. (2014). Evaluation of different amendments to stabilize cadmium, zinc, and copper in a contaminated soil: Influence on metal leaching and phytoavailability. Soil and Sedime nt Contamination: An International Journal, 23, (6), 628-640.
4. Candelario-Torres, M.F. (2014). Rhizofiltration of metal polluted effluents by Nicotiana tabacum, M.Sc. diss., Universidad Autonoma de Nuevo Leon (in Spanish), pp. 1-63.
5. Durand, T.C., Hausman, J.F., Carpin S., Alberic, P., Baillif, P., Label, P. & Morabito, D. (2010). Zinc and cadmium effects on growth and ion distribution in Populus tremula × Populus alba, Biologia Plantarum, 54, 1, pp. 191-194. https://doi.org/10.1007/s10535-010-0033-z
6. Elouear, Z., Bouhamed, F., & Bouzid, J. (2014). Evaluation of different amendments to stabilize cadmium, zinc, and copper in a contaminated soil: Influence on metal leaching and phytoavailability. Soil and Sediment Contamination: An International Journal , 23, 6, pp. 628-640. https://doi.org/10.1080/15320383.2014.857640
7. Erdem, H., Kinay, A., Öztürk, M. & Tutuş, Y. (2012). Effect of cadmium stress on growth and mineral composition of two tobacco cultivars, Journal of Food, Agriculture and Environment, 10, 1, pp. 965-969.
8. Garg, N., & Chandel, S. (2012). Role of arbuscular mycorrhizal (AM) fungi on growth, cadmium uptake, osmolyte, and phytochelatin synthesis in Cajanus cajan (L.) Millsp. under NaCl and Cd stresses, Journal of Plant Growth Regulation, 31, 3, pp. 292-308. DOI: 10.1007/s00344-011-9239-3
9. Green-Ruiz, C., Rodriguez-Tirado, V. & Gomez-Gil, B. (2008). Cadmium and zinc removal from aqueous solutions by Bacillus jeotgali: pH, salinity and temperature effects, Bioresoure Technology, 99, 9, pp. 3864-3870. DOI: 10.1016/j.biortech.2007.06.047
10. He, J.G., Liu, F., Han, B.P., Zhao, B.W. & Liu, J. (2011a). Treatment of tannery wastewater with salt tolerant bacteria basing on different culture mediums, Advanced Materials Research , 403-408, 1, pp. 625-633. DOI: 10.4028/www.scientific.net/AMR.403-408.625
11. He, J., Qin, J., Long, L., Ma, Y., Li, H., Li, K., & Luo, Z.B. (2011b). Net cadmium flux and accumulation reveal tissue‐specific oxidative stress and detoxification in Populus × canescens, Physiologia Plantarum, 143, 1, pp. 50-63. DOI: 10.1111/j.1399-3054.2011.01487.x
12. He, J., Li, H., Luo, J., Ma, C., Li, S., Qu, L., & Luo, Z.B. (2013). A transcriptomic network underlies microstructural and physiological responses to cadmium in Populus × canescens, Plant Physiology, 162, 1, pp. 424-439. DOI: 10.1104/pp.113.215681
13. He, J., Li, H., Ma, C., Zhang, Y., Polle, A., Rennenberg, H. & Luo, Z.B. 2015. Overexpression of bacterial γ‐glutamylcysteine synthetase mediates changes in cadmium influx, allocation and detoxification in poplar, New Phytologist, 205, 1, pp. 240-254. DOI: 10.1111/nph.13013
14. Hetherington, A. M., & Woodward, F. I. (2003). The role of stomata in sensing and driving environmental change. Nature, 424, 6951, pp. 901-908. https://doi.org/10.1038/nature01843
15. Li, X., Ding, F., Lo, P. & Sin, S. (2002). Electrochemical disinfection of saline wastewater effluent, Journal of Environmental Engineering, 128, 8, pp. 697-704. DOI: 10.1061/(ASCE)0733-9372(2002)128:8(697)
16. Lin, B., Gao, H., & Lai, H. (2016). Spatial Characterization of Arsenic, Cadmium, and Lead Concentrations in Tobacco Leaves and Soil, Analytical Letters, 49, 10, pp. 1622-1630. DOI: 10.1080/00032719.2015.1113419
17. López-Chuken, U.J. & Young, S.D. (2005). Plant Screening of Halophyte Species for Cadmium Phytoremediation, Zeitschrift für Naturforschung C, 60, 3-4, pp. 236-243. PMID:15948589
18. López-Chuken, U.J. & Young, S.D. (2010). Modelling sulphate-enhanced cadmium uptake by Zea mays from nutrient solution under conditions of constant free Cd2+ ion activity, Journal of Environmental Sciences, 22, 7, pp. 1080-1085. DOI: 10.1016/S1001-0742(09)60220-5
19. López-Chuken, U.J., Young, S.D. & Guzman-Mar, J.L. (2010). Evaluating a ´biotic ligand model´ applied to chloride-enhanced Cd uptake by Brassica juncea from nutrient solution at constant Cd2+ activity, Environmental Technology, 31, 3, pp. 307-318. DOI: 10.1080/09593330903470685
20. López-Chuken, U.J., López-Domínguez, U., Parra-Saldivar, R., Moreno, E., Hinojosa, L., Guzmán-Mar, J.L. & Olivares-Sáenz, E. (2012). Implications of chloride-enhanced Cd uptake in (saline) agriculture: modeling Cd uptake by maize and tobacco, International Journal of Environmental Science and Technology, 9, 1, pp. 69-77. DOI: 10.1007/s13762-011-0018-2
21. Lugon-Moulin, N., Zhang, M., Gadani, F., Rossi, L., Koller, D., Krauss, M. & Wagner, G.J. (2004). Critical review of the science and options for reducing cadmium in tobacco (Nicotiana tabacum L.) and other plants, Advances in Agronomy, 83, 1, pp. 111-118. DOI: 10.1016/S0065-2113(04)83003-7
22. Pandey, S.K. & Singh, H. (2011). A Simple, Cost-Effective Method for Leaf Area Estimation, Journal of Botany, 2011, pp. 1-6. DOI: 10.1155/2011/658240
23. Perfus-Barbeoch, L., Leonhardt, N., Vavasseur, A. & Forestier, C. (2002). Heavy metal toxicity: cadmium permeates through calcium channels and disturbs the plant water status, The Plant Journal, 32, 4, pp. 539-548. DOI: 10.1046/j.1365-313X.2002.01442.x
24. Sas-Nowosielska, A., Kucharski, R., Małkowski, E., Pogrzeba, M., Kuperberg, J. & Kryński, K. (2004). Phytoextraction crop disposal--an unsolved problem, Environmental Pollution, 128, 3, pp. 373-379. DOI: 10.1016/j.envpol.2003.09.012
25. Tipping, E., Rey-Castro, C., Bryan, S.E. & Hamilton-Taylor, J. (2002). “Al(III) and Fe(III) binding by humic substances in freshwaters, and implications for trace metal speciation, Geochimoca et Cosmochimica Acta, 66, 18, pp. 3211-3224. DOI: 10.1016/S0016-7037(02)00930-4
26. United Nations. (2013). “The Eight Millenium Development Goals.” Accesed 29 February 2016. https://www.un.org/millenniumgoals/bkgd.shtml
27. Wang, X., Cheng, S., Zhang, X., Li, X. &. Logan, B.E. (2005). Impact of salinity on cathode catalyst performance in microbial fuel cells (MFCs), International Journal of Hydrogen Energy, 36, 21, pp. 13900-13906. DOI: 10.1016/j.ijhydene.2011.03.052
28. Wani, P.A., Khan, M.S. & Zaidi, A. (2005). Toxic effects of heavy metals on germination and physiological processes of plants.” [In:] Toxicity of heavy metals to legumes and bioremediation, edited by Zaidi, A., Wani, P.A. & Khan M.S. Springer, Netherlands, pp. 45-66. DOI: 10.1007/978-3-7091-0730-0
29. Weggler-Beaton, K., McLaughlin, M.J. & Graham, R.D. (2000). Salinity increases cadmium uptake by wheat and Swiss chard from soil amended with biosolids, Australian Journal of Soil Research, 38, 1, pp. 37-45. DOI: 10.1071/SR99028
30. Xu, Z. & Zhou, G. (2008). Responses of leaf stomatal density to water status and its relationship with photosynthesis in a grass, Journal of Experimental Botany, 59, 12, pp. 3317-3325.DOI: 10.1093/jxb/ern185
31. Yadav, A. K., Pathak, B. & Fulekar, M.H. (2015). Rhizofiltration of Heavy Metals (Cadmium, Lead and Zinc) From Fly Ash Leachates Using Water Hyacinth (Eichhornia crassipes), International Journal of Environment, 4, 1, pp. 179-196. DOI: 10.3126/ije.v4i1.12187
Go to article

Authors and Affiliations

Ulrico Javier Lopez-Chuken
1
Icela Dagmar Barceló-Quintal
2
Evangelina Ramirez-Lara
1
Maria Elena Cantu-Cardenas
1
Juan Francisco Villarreal-Chiu
1
Julio Cesar Beltran-Rocha
1
Claudio Guajardo-Barbosa
1
Carlos Jesus Castillo-Zacarias
1 3
Sergio Gomez-Salazar
4
Eulogio Orozco-Guareno
4

  1. Autonomus University of Nuevo Leon, (Universidad Autonoma de Nuevo León), Biotechnology and Nanotoxicology Research Center (CIBYN), Mexico
  2. Basic Science and Engineering Division, Metropolitan Autonomus University – Azcapotzalco Unit, Mexico
  3. Monterrey Technological Institute of Higher Studies (Instituto Tecnológico y de Estudios Superiores de Monterrey) Mexico
  4. Exact Sciences and Engineering University Center (CUCEI).University of Guadalajara, Mexico
Download PDF Download RIS Download Bibtex

Abstract

The paper deals with the possibility of the renovation of permanent steel molds for casting using electric arc welding technology. When casting liquid metal into permanent steel molds, there is chemical-thermo-mechanical wear of the surface of the mold cavity and the inlet system, which causes a deterioration of the surface quality and dimensional accuracy of the casting. For this reason, it is necessary to renovate the steel mold after a certain casting interval - mold life. In this case, the technology of manual electric arc welding with a coated electrode was used for the renovation. The welding renovation aims to increase the service life of the mold using carbide hardfacing welds, which after welding achieve high mechanical properties of the renovated mold parts. Two types of hardfacing coated electrodes were used for welding, namely the OK Weartrode 55HD electrode and the OK Weartrode 50T electrode. Macroscopic analysis, tribological tests as well as the measurement of the hardness of the welded layers were performed to evaluate the quality and the friction coefficients of the additional materials used. The properties of hardfacing welds were compared with the properties of the basic material of the high-alloy steel mold. The main advantage is in addition to increasing the durability and longevity of the mold, also reducing the cost of mold renovation compared to other renovation technologies.
Go to article

Bibliography

[1] Jankura, D., (2013). Wear evaluation of renovation layers based on hardfacing (Hodnotenie opotrebenia renovačných vrstiev na báze tvrdonávarov). Transfer Inovácií. 26, 126-129.
[2] Moravec, J. et.al. (2018). Experimental casting of forging ingots from model maeriál. In 22nd Slovak_Polish Scientific Conference on Machine Modelling and Simulations, 5-8 September 2017 (article No. 05017). Sklene Teplice, Slovakia: Univerzity of Zilina.
[3] Moravec, J. et.al. (2001). F orming machines (Tvárniace stroje). Žilina: Edis, 2011, ISBN: 978-80-554-0446-2. (in Slovak).
[4] Ptáček, Luďek et. al. (2002). Materials science (Nauka o material II). Brno: Akademické nakaldatelství CERM, s.r.o, ISBN: 80-7204-248-3.
[5] Jhvar, S.; Paul, C.P.; Jain, N.K. (2013). Causes of failure and repairing optinos for diels and molds. A review. Engineering Failure Analysis 34, 519-535.
[6] Mician, M. et al. (2018). The Repair of Foundry Defects in Steel Castings Using Welding Technology. Archives of Foundry Engineering. 18(2), 177-180. DOI: 10.24425/122524.
[7] Chander, S., Chawla, V. (2017). Failure of forging dies an update prespective. Materials Today: Proceedings 4, 1147-1157
[8] Chan, C.; Wang, Y.; Ou, H.; He, Y.; Tang, X. (2014). A review on remanufacture of dies and moulds. Journal of Cleaner Production. 64, 13-23.
[9] Pliszka, I. et al. (2018). Surface improvement by wc-cu electro-spark coatings with laser modification. In: 10th conference on terotechnology, 18-19 October 2017 (pp. 237-242). Kielce, Poland: Kielce University of Technology.
[10] Pastircak, R., Scury, J. (2017). Effect of Pressure on Crystalization of AlSiMg Alloy. Archives of Metallurgy and Materials. 62 (4), 2193-2198. DOI: 10.1515/amm-2017-0323.
[11] Gucwa, M., Beczkowski, R. & Winczek, J. (2017). The effect of type of welding sequence during hardfacing chromium cast iron for erosion resistance. Archives of Foundry Engineering. 17(3), 51-54. DOI: 10.1515/afe-2017-0089.
[12] Bronček, J., Vicen, M., Fabian, P., Radek, N., 2020, Investigation of the tribological properties of the nitride layer on heat-treated steel 100Cr6, Lecture notes in mechanical engineering, 59th International Conference of Machine Design, 11-14 September 2018, (pp. 463-471). Žilina, Slovakia: University of Žilina.
[13] Mician, M. et al. (2020) Effect of the t(8/5) cooling time on the properties of S960MC steel in the HAZ of welded joints evaluated by thermal physical simulation. Metals. 10(2), 229. DOI: 10.3390/met10020229
[14] Winczek, J. et al. (2019). The Evaluation of the Wear mechanism of High-Carbon Hardfacing Layers. Archives of Metallurgy and Materials. 64 (3), 1111-1115. DOI: 10.24425/amm.2019.129502.

Go to article

Authors and Affiliations

J. Šutka
1
R. Koňar
1
J. Moravec
1
L. Petričko
1

  1. Department of Technological Engineering, University of Zilina, Univerzitna 1, 010 26 Zilina, Slovakia

This page uses 'cookies'. Learn more