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Ksenotym w łupkach łyszczykowych zmineralizowanych kasyterytem z pasma łupkowego Starej Kamienicy

Bobiński W., Siemiątkowski J., Starnawska E.

Przegląd Geologiczny

2004

Vol. 52, nr 1

61-63

Xenotime in mica schists with chlorite was analysed with EDS microprobe combined with scanning electron microscope JEOL JSM 35. The samples come from two boreholes (C-XI-41 and C-XII-54) drilled in the western part of Stara Kamienica Range. Xenotime crystals are of zoning and patchy character due to the changing composition of HREE elements. Xenotime is probably of hydrothermal origin which is connected with premetamorphic cassiterite and sulfide mineralization.

Badania geochemiczne i biogeochemiczne na obszarze trzech parków narodowych: Magurskiego, Świętokrzyskiego i Wigierskiego z zastosowaniem analizy wariancji (ANOVA)

Migaszewski M. Z., Gałuszka A., Świercz A., Pasławski P., Starnawska E., Styrcz K., Cwener A., Pawelec J., Podlaski R., Romański M.

Przegląd Geologiczny

2004

Vol. 52, nr 6

507--515

Geochemical and biogeochemical studies in national parks can be used for assessing anthropogenic influence on these relatively natural areas, These studies, funded by “National Fund for Environmental Protection and Water Management", were carried out in Magurski, OEwiętokrzyski (Holy Cross Mts) and Wigierski National Parks (SE, south-central and NE Poland) during 2001–2002. The study areas were selected on the basis of diverse anthropopressure. In all, 16 investigation sites were selected in each of national parks using ”barbell“ design that provided detailed statistical information on the concentrations of elements. The soil, rock and plant samples were analyzed for 22–28 elements and pH, as well as pine needles for sulfur and carbon stable isotope ratios. In addition, studies of pine needle surfaces and dust particles were performed with a Surface Scanning Electron Microscope. The obtained results enabled to present the geochemical characteristics of the study areas and to assess the role of natural and anthropogenic pollution sources in the recent geochemical element balance.

Zimna emisja elektronowa z warstw ukladu C(sub60)/C(sub70)+Ni

Czerwosz E., Adydan M., Dłużewski P., Gierałtowski W., Kozłowski M., Starnawska E., Wronka H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

1999

z. 123

83-86

We investigated cold electron emission from C60/C70+Ni films deposited on fused silica and molybdenum substrates. Films were characterised before and after electron emission measurements by TEM, ED, SEM and EDS. Films were composed of nanocrystalline Ni objects dispersed in carbon/fullerrenes matrix. I-V characteristics for electron emission obtained in diode geometry for several films with various Ni contents (3 - 12wt% of. Ni) exhibited the dependence on Ni contents. The bias voltage applied along the surface enhanced electron emission from films with Ni contents higher than 3wt% and caused the formation of conducting paths in films with 3wt% of Ni.