Since this chemical separation of the carbon component occurs entirely in the solid state, the resulting structure is a fine mechanical mixture of ferrite and cementite.

由于这种碳成分的化学分离完全发生在固态中，产生的组织结构是一种细致的铁素体与渗碳体的机械混合物。

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In chemistry and chemical engineering, a separation process is used to transform a mixture of substances into two or more distinct products.

在化学及化学工程，分离过程，是一个用于转换不同的产品物质的混合物为两个或更多。

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But this is claimed to be the first time that such chemical separation has been demonstrated in a synthetic membrane.

但是这是第一次证明有这种合成膜。

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The firm develops biocatalysts for use in making drugs as a complement to other chemical and separation technologies.

ECONOMIST: MONITOR

There are however few economically concentrated ores of the metals and their very similar chemical properties make the separation and isolation of individual REs in pure form difficult and expensive.

FORBES: Shortage Of Rare Earth Metals Exacerbated By Smuggling