Changes in trace element concentrations in hair of growing children |
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Authors: | Takashi Sakai Masanobu Wariishi Keitaro Nishiyama |
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Institution: | (1) Department of Science for Living, Shikoku University Junior College, Furukawa, Ojin-cho, Tokushima, Japan;(2) Department of Human Life Science, Faculty of Human Life Science, Shikoku University, Furukawa, Ojin-cho, Tokushima, Japan |
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Abstract: | Head hair concentrations of zinc, copper, manganese, and iron from a total of 418 subjects (154 male and 264 female) aged
between 6 mo and 20 yr were measured mainly with flameless atomic absorption spectrophotometry. Only zinc analysis of a part
of the female samples (n=140) were analyzed with inductively coupled plasma-atomic emission spectrometry. The two analytical methods showed close
agreement.
The mean concentration of copper and manganese were significantly higher in male subjects than in female subjects. The trace
element concentrations in hair varied with the subject’s age. Zinc concentration in hair decreased from 6 mo to 14 yr in the
male subjects and decreased from 6 mo to 12 yr in the female subjects. Then, the concentrations increased gradually to 20
yr in the both sexes. Age-dependent variations of copper and manganese concentrations in hair showed similar trends to those
of zinc. The results of this study suggest that a higher concentration in the diet of these trace elements may be required
for growing children, especially in the period of adolescence. |
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Keywords: | Zinc copper manganese iron growing children hair |
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