DISHWARE AS A POSSIBLE SOURCE OF LEAD POISONING

In January, 1958, Public Health officials encountered a potentially significant source of exposure to lead in the form of improperly glazed imported dishware. Upon exposure to low-acid foods, the lead in the glazes of these dishes went into solution and could be ingested. Information on the distribution of such dishes indicates that many are probably still in use in homes and eating establishments and in some areas may still be on the commercial market.     

Cd^2＋污染对莼菜叶片形态学伤害反应的研究

重点研究了Ｃｄ＾２＋胁迫下莼菜叶片的受害症状及叶肉细胞超微结构的变化。当Ｃｄ＾２＋浓度大于２μｇ·ｇ＾－１时,莼菜叶面将在短期内出现不同程度的受害症状。莼菜叶片遭受Ｃｄ＾２＋毒害初期,叶肉细胞质体中的少数基粒会发生膨胀或解体,线粒体的脊出现瓦解,部分核仁裂解成数块大小不等的颗粒。随着叶肉细胞遭受毒害程度的加深,质体中较多的类囊体便出现解体,多种膜性结构如：质体、线粒体的外包膜以及核膜、液泡膜等均遭     

实验性铅中毒对大鼠海马p75基因表达的影响

目的　探讨铅对海马 p75基因表达的影响。方法　采用RT PCR方法 ,半定量分析铅对大鼠海马组织NGFmRNA表达的变化。以地高辛标记的p75cDNA为探针 ,采用原位杂交方法观察铅对大鼠海马 p75mRNA表达的影响。结果　与对照组相比 ,大鼠以 1%醋酸铅经口染毒 8周 ,海马组织 p75mRNA的表达量明显下降 (P <0 0 1)。结论　铅可影响海马 p75基因的表达。