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56-----介绍一种识别coffee的方法
生词:
An analyzer can distinguish different brands of coffee and the coffee beans----help growers determine whether the coffee is good
Have been trying for years---not easy
Challenge: beans consist of 1000 compounds that change with variations----and similar (gas chromatography and electric noses both fail because of this)
Over the past decade, KS and UC have refined the electronic nose approach
---use dyes--->making them more specific
---put dyes on a polymer
(chemical classes change color with certain chemical vapors)
==>produce a pattern of colors as coffee’s mixture of compounds interacted with dyes---different coffee generated unique patterns
This does not give information about the individuals compounds
//but now can tell the differences between different coffees----so can help growers quickly and cheaply analyze problems with coffee + (example: burnt flavors
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