结果发现发铬、硒含量疾病组明显降低，发锰含量脑梗塞组明显升高。
It was found that the levels of hair chromium and selemiun were obviously decreased in illness group.
通过在锰砂及石英砂上固定自行分离的纤发菌属细菌，研究了生物固定化锰砂及石英砂滤柱的除铁除锰能力。
Through immobilizing the isolated Leptothrix bacteria on manganese sand and quartz sand, the iron and manganese removal efficiency by the biologically immobilized filtration columns were studied.
结果表明发镧、锌、锰、铜及钙、镁含量在人群间有显著性差异。
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