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〔目的〕将无职业性锰接触的一般健康人的头发,血液和尿中的锰含量每月测定一次,观察一年内测得的个体值的变化情况。另外将同一人的头发分为白发与黑发比较其锰含量。
[Purpose] To determine the changes of individual values measured within one year once a month for manganese content in hair, blood and urine of general healthy people without occupational manganese exposure. In addition to the same person’s hair is divided into white hair and black hair compared to its manganese content.