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.
药物洗发精会有些帮助，如含有锌的硫化铁矿物质或含有硒的硫化物，甚至含有焦油和水杨酸的强力洗发精。
Medicated shampoos will help, including zine pyrithione or selenium sulphide, and even stronger shampoos containing tar or salicylic acid.
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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