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Wyszukujesz frazę "Pawlyta, J." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Diagenetic signals from ancient human remains - bioarchaeological applications
Autorzy:
Szostek, K.
Stepańczak, B.
Szczepanek, A.
Kępa, M.
Głąb, H.
Jarosz, P.
Włodarczak, P.
Tunia, K.
Pawlyta, J.
Paluszkiewicz, C.
Tylko, G.
Powiązania:
https://bibliotekanauki.pl/articles/2086542.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
diagenesis
Neolithic
oxygen isotopes
FTIR
EDS
bioarchaeology
Opis:
This preliminary study examines the potential effects of diagenetic processes on the oxygen-isotope ratios of bone and tooth phosphate (δ18O) from skeletal material of individuals representing the Corded Ware Culture (2500–2400 BC) discovered in Malżyce (Southern Poland). Intra-individual variability of Ca/P, CI, C/P, collagen content (%) and oxygen isotopes was observed through analysis of enamel, dentin and postcranial bones. Using a variety of analytical techniques, it was found that, despite the lack of differences in soil acidity, not all the parts of a skeleton on a given site had been equally exposed to diagenetic post mortem changes. In a few cases, qualitative changes in the FTIR spectrum of analysed bones were observed. The data suggest that apart from quantitative analyses, i.e., the calculation of Ca/P, CI, C/P and collagen content, qualitative analyses such as examination of the absorbance line are recommended. The degree to which a sample is, contaminated on the basis of any additional, non-biogenic peaks, deemed to be contaminated should also be specified.
Źródło:
Mineralogia; 2011, 42, 2/3; 93--112
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of effectiveness of advanced treatment of municipal wastewater by sorption and nanofiltration. Separate processes and integrated systems
Autorzy:
Bohdziewicz, J.
Kamińska, G.
Pawlyta, M.
Łukowiec, D.
Powiązania:
https://bibliotekanauki.pl/articles/208002.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
effluent treatment
carbon
effluents
nanofiltration
pollution
sorption
wastewater treatment
water filtration
inorganic pollutants
municipal effluents
municipal wastewaters
nitrogen
phosphorus
oczyszczanie ścieków
węgiel
ścieki
nanofiltracja
zanieczyszczenia
sorpcja
filtracja wody
zanieczyszczenia nieorganiczne
ścieki komunalne
azot
fosfor
Opis:
The feasibility of effluent treatment in separate processes and in integrated systems has been compared. In the sorption process, carbon nanotubes were used in a pressure installation, enabling execution of the process of sorption with nanofiltration in a cross-flow system. Evaluation of treatment effects based on the measurement of typical pollution parameters (COD, TOC, phenolic index, forms of nitrogen and phosphorus) and concentration of bisphenol A. The results show poor feasibility of sorption as a process for advanced treatment of municipal effluent. Effluent polishing in integrated sorption-nanofiltration systems, however, guaranteed high removal rates of organic and inorganic pollutants.
Źródło:
Environment Protection Engineering; 2015, 41, 2; 119-132
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Melting of Grey Cast Iron Based on Steel Scrap Using Silicon Carbide
Autorzy:
Stojczew, A.
Janerka, K.
Jezierski, J.
Szajnar, J.
Pawlyta, M.
Powiązania:
https://bibliotekanauki.pl/articles/381570.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
synthetic cast iron
grey cast iron
silicon carbid
ferrous alloys
carburization
cast iron microstructure
żeliwo syntetyczne
żeliwo szare
nawęglanie
mikrostruktura żeliwa
Opis:
The paper presents the issue of synthetic cast iron production in the electric induction furnace exclusively on the steel scrap base. Silicon carbide and synthetic graphite were used as carburizers. The carburizers were introduced with solid charge or added on the liquid metal surface. The chemical analysis of the produced cast iron, the carburization efficiency and microstructure features were presented in the paper. It was stated that ferrosilicon can be replaced by silicon carbide during the synthetic cast iron melting process. However, due to its chemical composition (30% C and 70% Si) which causes significant silicon content in iron increase, the carbon deficit can be partly compensated by the carburizer introduction. Moreover it was shown that the best carbon and silicon assimilation rate is obtained where the silicon carbide is being introduced together with solid charge. When it is thrown onto liquid alloy surface the efficiency of the process is almost two times less and the melting process lasts dozen minutes long. The microstructure of the cast iron produced with the silicon carbide shows more bulky graphite flakes than inside the microstructure of cast iron produced on the pig iron base.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 77-82
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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