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必需微量元素锌与有害微量元素铅、镉对人体分别产生不同作用。本研究以智商(IQ)正常青少年发锌、铅、镉三种微量元素的平均值、IQ及学业成绩的变化情况,观测三种微量元素对他们认知能力的影响。 1 研究对象及方法 1.1 研究对象以城市及农村初中一年级男女学生108名(男62、女46),年龄范围为12～
The necessary trace elements zinc and harmful trace elements lead and cadmium have different effects on the human body. In this study, the average adolescents of normal IQ (IQ) hair zinc, lead, cadmium three trace elements, IQ and academic performance changes observed three trace elements on their cognitive ability. 1 Subjects and methods 1.1 The subjects to study urban and rural junior high school male 108 male students (male 62, female 46), the age range of 12 ~