Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: metal occurrence

Sortuj według:

Ogranicz wyniki do:

The application of principal component analysis to interpretation of occurrence of metals in the femur head

100%

Brodziak-Dopierala B., Kwapulinski J., Kowol J., Sobczyk K., Gajda Z.

Polish Journal of Environmental Studies

2010

tom 19

nr 1

49-58

Principal components analysis is one of the modern mathematical-statistic methods and it enables the reduction and organization of the results in order to indicate important implicit features. In such an analysis the components, correlated with each other, are shown on the basis of the matrix correlation of many variables. The examined materials were femur heads of hip joints which had various degenerative-deforming changes and came from people who lived on the industrial area. The examined population of 103 femur heads came from 64 women and 39 men. The determination of the content of 12 metals in samples of femur heads was made using atomic absorption spectrophotometry (AAS) by the means of the Pye Unicam SP-9 in the flame acetylene-air. The principal components analysis in most examined groups showed that the first factor describes the change of the Cr, Ni, Cu, Zn, Na and Ca contents. Other main components emphasized variously the meaning of a given parameter. The results of PCA analysis are in accordance with the results of correlative analysis.

Changes in the forms of metal occurrence in bottom sediment under conditions of artificial hypolimnetic aeration of Rybnik Reservoir, Southern Poland

84%

Loska K., Wiechula D., Cebula J.

Polish Journal of Environmental Studies

2000

tom 09

nr 6

523-530

The content of metals in carbonates, sulfides, exchangeable, adsorbed and organically bound forms was determined in bottom sediment by means of a sequential chemical extraction method after Rudd et al. Cadmium, nickel and copper was found mainly in the forms of sulfides (Cd > 40%, Ni > 30%, Cu > 70%), chromium and zinc in the fraction of carbonates and sulfides. Manganese was attributed to an organically bound form (25%), carbonates and sulfides. Iron had a very small contribution of the exchangeable and adsorbed forms (<1%); sulfides contributed the most (40-45%). Lead was found mainly in the fraction of carbonates (about 35%) at all sites. Aeration of the hypolimnetic water caused only slight changes in the forms of metal occurrence in the bottom sediment.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Brodziak-Dopierala B.

1 Cebula J.

1 Gajda Z.

1 Kowol J.

1 Kwapulinski J.

1 Loska K.

1 Sobczyk K.

1 Wiechula D.

1 2010

1 2000

Wyniki wyszukiwania

The application of principal component analysis to interpretation of occurrence of metals in the femur head

Changes in the forms of metal occurrence in bottom sediment under conditions of artificial hypolimnetic aeration of Rybnik Reservoir, Southern Poland