SSS 2012-01-17
时间：2012-02-17 05:34:11
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（单词翻译）
People have used tobacco for well over a thousand years. And researchers recently found unique physical evidence of the ancient habit. They detected traces of tobacco in a 1300-year-old Mayan container. The work is in the journal Rapid Communications in Mass Spectrometry.
Based on
hieroglyphics1 and images of people smoking, archaeologists assumed that the Mayans used tobacco. In the hope of finding physical
remains2, the researchers examined the inside of a particular clay
flask3 dating back to the year 700 AD. Analysis of the flask revealed the presence of
nicotine4, as well as a few products of nicotine oxidation.
The chemical analysis owes some of its success to a dirty container—because the inside of the flask was not cleaned, the nicotine
residue5 remained uncontaminated. It also helped that the flask had a single purpose, and was not reused to hold multiple products. But the most important aid to this discovery was
undoubtedly6 some Mayan writing on the container. Which roughly translated means: container for tobacco.
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