b**s
发帖数: 589 | 1 A simple plastic disc designed to sit inside food packaging changes colour
when exposed to the noxious vapours given off by rotting food. Its developers
hope it will provide a simple way for consumers to tell whether food has gone
off.
Dwight Miller and his colleagues at the US National Center for Toxicological
Research in Jefferson, Arkansas, created the polymer discs. They contain
complex organic dyes that change colour drastically from clear to telltale
pink, blue or yellow, depending on the | c*s
发帖数: 2145 | 2 呵呵, 当年老板着学生的时候, 给学生的PROPOSAL就是这个, 不过是做成塑料薄膜,也是
用DYE CONTAINING POLYMER, 后来那个学生没来
developers
gone
printed
work
【在 b**s 的大作中提到】
: A simple plastic disc designed to sit inside food packaging changes colour
: when exposed to the noxious vapours given off by rotting food. Its developers
: hope it will provide a simple way for consumers to tell whether food has gone
: off.
: Dwight Miller and his colleagues at the US National Center for Toxicological
: Research in Jefferson, Arkansas, created the polymer discs. They contain
: complex organic dyes that change colour drastically from clear to telltale
: pink, blue or yellow, depending on the
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