The organic expanders are necessary to negative active materials of lead-acid battery.

铅酸蓄电池负极活性物质中的膨胀剂是必不可少的。

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An increasing interest has been focused on synthesizing battery active materials by the above method.

低热固相反应法合成电池活性材料引起了人们的关注。

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As physiological active materials, polyamines have a close relationship with the senescence of plants.

多胺作为生理活性物质与植物衰老关系密切。

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Nanotechnology enables drug delivery mechanisms that can send biologically active materials directly to the location where they are beneficial.

FORBES: On the Ground Floor of Nanotechnology

Battery efficiency, lifespan and even safety could be vastly improved, the researchers believe, by increasing the surface area of the active materials that make up the battery electrodes.

FORBES: Magazine Article

Raw materials come from one place and are processed into active ingredients in another.

ECONOMIST: Fake pharmaceuticals