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Comparative Study on Mn and the Selected Elements Concentration in Human Hair pp. 217-228 $100.00
Authors:  (Maria Długaszek, Mirosława Kaszczuk, Military University of Technology, Warsaw, Poland)
Manganse (Mn) participates in many important biochemical processes. First of all, it is a cofactor for several enzymes. Mn deficiency manifests, e.g., in lipid metabolism and bone mineralization disturbances. On the other hand, the Mn overload may result in respiratory and neurological disorders, interactions with other elements, generation of reactive oxygen species (ROS). Nowadays, Mn is added to gasoline as an anti-knocking agent. So, its concentration in the human environment has grown. Human scalp hair is more and more often used as an indicator of the exposure and distribution of bioelements and toxic metals in the human body. This study aimed at investigating the Mn level in human hair (n = 179, 82 women, and 97 men) and correlations between Mn and other elements concentration, i.e., calcium (Ca), magnesium (Mg), zinc (Zn), iron (Fe), lead (Pb), cadmium (Cd), and nickel (Ni). Hair samples, washed with acetone and redistilled water, were mineralized in the mixture of HNO3 and HClO4 acids. The concentration of elements was determined by the atomic absorption spectrometry method (AAS). Content of Ca, Mg, Zn, Cu, and Fe was measured by the flame technique (FAAS), while concentration of Pb, Cd, Ni and Mn was analyzed by the electrothermal atomic absorption spectrometry in the graphite furnace (GFAAS). The obtained results are presented as the mean, median, and standard deviation. The average concentration of Mn in women‘s hair was 0.17 μg/g (5th–95th percentile: 0.03–0.36 μg/g) and in men one– 0.20 μg/g (5th–95th percentile: 0.03–0.42 μg/g). There were no statistically significant differences between Mn content in women‘s and men‘s hair. The study showed that the Mn level for both sexes was not also a function of age. The mean level of other elements was respectively: Ca – 339.5 μg/g, Mg – 20 μg/g, Zn – 158 μg/g, Cu – 12.5 μg/g, Fe – 11.5 μg/g, Pb – 0.8 μg/g, Cd – 0.07 μg/g, and Ni – 0.17 μg/g. We have found the significant positive correlation (p<0.05) between Mn and Mg concentration in female hair, and also between Mn and Cu, Fe, Pb, Cd, and Ni concentration in cases of male hair. These results may be useful as background data in the next populational studies. 

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Comparative Study on Mn and the Selected Elements Concentration in Human Hair pp. 217-228