The colorful effect is due to the diatom's silica cell wall, which encases the organism like a glassy shell.

它的五颜六色效果是由于硅藻的像玻璃外壳包围着机体的二氧化硅细胞壁。

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Diatoms already secrete silica by exocytosis-a biological process by which cells direct secreted material outside the cell walls.

硅藻已经通过胞外分泌二氧化硅，这是细胞直接把物质分泌出细胞壁的一个生物过程。

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Any of various microscopicone-celled or colonial algae of the class bacillariophyceae having cell walls of silica consisting of two interlocking symmetrical valves.

硅藻一种由两个互联对称瓣构成硅细胞壁的、硅藻纲类的微小单细胞或群体的细胞藻。

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These same silica nanostructures with other cell recipes inside them could be used to detect cancer.

FORBES: The Science of Small

This year he showed how, by injecting the cells into a matrix made from silica nanotubes wrapped in a sol-gel, he was able to keep a cell alive for six months.

FORBES: The Science of Small