介绍粗硒经过蒸馏法生产99.95%工业精硒的生产方法和生产原理。

The paper introduces the production method about which the 99.95% fine selenium would be made from crude selenium by distillation and its production principles.

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水稻品种精米和米皮中硒含量分布遵循正态分布规律，表明水稻精米和米皮中硒含量属数量性状。

The Se contents in milled rice and rice pericarp were shown to obey normal distributions, indicating that the Se content in milled rice and rice pericarp were quantitative traits.

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结果表明：①早、晚季水稻品种精米和米皮中硒含量表现均无明显差异。

The main results were shown as follows. (1)The Se contents of milled rice and rice pericarp in early and late rice did not show significant difference.

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