R-mode factor analysis applied to the distribution of elements in soils from the Aydin basin, Turkey

Soil samples collected at approximately 4-km intervals within the Aydin basin, Turkey, were analysed by Energy Dispersive X-ray Fluorescence Spectroscopy, Gamma Spectroscopy and Alfa Spectroscopy for the elements Ba, Ce, Cr, Fe, Mn, Ni, Rb, Sr, Ti, Zn, Zr; K (radioactive potassium), Th-232 (equivalent thorium, eTh), U-238 (equivalent uranium, eU) and Ra. R-mode factor analysis was used to describe the relationship among 15 remotely sensed and geochemical and industrial variables for the basin. Principal component and varimax factor rotation were applied to the data. Because varimax factor loading values show the best results, these were used in interpreting. Four factors were extracted in topsoil data and account for 78% of the total data variance. These are named as an industrial, a mineral/an agricultural, igneous and radioactive factors. (C) 2002 Elsevier Science B.V. All rights reserved

Factor analysis in the geochemical studies along the Gediz river, Turkey

Water samples collected from 321 sampling points at I km intervals at a site located close to the industrial and geological areas in the Gediz river were analysed for U, Ra, Na, Mg, Mn, K. Ni, Cd, Co, Pb, Al, Fe, Cr, Zn, Cu and Ca. Heavy metal concentrations in the samples were determined by atomic absorption spectroscopy, laser excited fluorescence, and radon collector chamber. Factor analysis was used to describe the relationship among 16 elements. Four factors were extracted and they account for 67% of the total variance in the data. These factors are named as industry, sea, agriculture and geology. According to this result, not only industrial plants but also geological structure and agricultural activities were seen to contribute in polluting of the river water. Beside, these factors have shown that a lot of agricultural activities and a sharp increase in the population of the Gediz basin, and industrial development related to above reasons speed up pollution of water sources and become a potential risk on the unpolluted sources

Factor analysis applied to distribution of elements in western Turkey

This paper examines the results of R-mode factor analysis performed on four radionuclides and two elements data from a geochemical survey from western Turkey. Sediment and soil samples numbering 321 were collected along the Gediz river and analysed for (238)eU, (232)eTh, K-40, Ra-226, Mg and Pb. Two factors in soil and sediment, which account for 59% and 56% of the total variance, respectively, were extracted and named as geological structure and volcano. (C) 2001 Elsevier Science Ltd. All rights reserved

Investigations of Some Parameters of the Collector Chamber Method For the Determination of Ra-226

WOS: A1994PT2480000

R-mode factor analysis applied to the exploration of radioactivity in the Gediz River

WOS: 000083559400030Sediment samples were collected from the river bed at 10 km intervals and have been analysed for eU, eTh, %K, Ra-226, Ca, Ti, Mn, Zn, Rb, Sr, Y, Zr, Ba, La and Ce. R-mode factor analysis was used to describe the relationship among 15 remotely sensed and geochemical data sets (variables) for the Gediz River. Four factors were extracted in the sediments and they account for 57.6% of the total variance in the data These factors are interpreted as granite (felsic), economy, volcano and industry factors, respectively

Comparison of the Calculated and Measured Stopping Powers of Low-Energy Electrons In Different Metals

6th International Symposium on Radiation Physics (ISRP-6) -- 1994 -- RABAT, MOROCCOWOS: A1995RJ94600065Int Radiat Phys Soc, Fac Sci Rabat, Morocco, Lab Phys Nucl, Morocco, Off Natl Elect, Morocco, Off Cherifien Phosphates, Morocco, Ctr Natl Energie Sci & Tech Nucl, Morocco, Assoc Ingenieurs Genie Atom Maro