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Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6～84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin'an in mountain area (P＜0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P＜0.01). (3) Soil iodine value was 0.11～2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution. 相似文献
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P2P网络流量监控技术探讨 总被引：1，自引：0，他引：1
随着互联网的不断发展,出现了越来越多的P2P应用。P2P应用占用了大量的网络带宽,使得网络变得越来越拥塞。本文在分析了与P2P安全相关问题的基础上,详细介绍P2P流量监控技术的基本原理,并对相关技术存在的优缺点进行了重点分析与探讨。 相似文献
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“三月来，四月走，雷锋叔叔没户口”，这是老百姓对雷锋活动一阵风、流于形式的形象描绘。但多年来，江西财经大学以“学雷锋一月一评”活动为载体，创新了学雷锋活动机制，爱心接力十余载，变三月学雷锋为常年学雷锋、天天学雷锋，让雷锋精神随学生一起成长。学生一届届毕业，但学雷锋的接力棒却不间断地传了下来。 相似文献
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