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Researchers uncover earliest tobacco use in the Pacific Northwest

UC Davis researchers uncover earliest tobacco use in the Pacific Northwest
The earliest known usage of tobacco in the Pacific Northwest was smoked using a pipe similar to this one, according to Shannon Tushingham, a UC Davis archaeology research associate. Credit: Shannon Tushingham

(Phys.org)—Native American hunter-gatherers living more than a thousand years ago in what is now northwestern California ate salmon, acorns and other foods, and now we know they also smoked tobacco—the earliest known usage in the Pacific Northwest, according to a new University of California, Davis, study.

"The study demonstrates that was part of the northwestern California culture very early ... shortly after the earliest documented Pacific Northwest Coast plank house villages," said the study, published in the .

Testing organic residues extracted from pipes, researchers from the UC Davis Department of Anthropology and the Fiehn Metabolomics Laboratory of the UC Davis Genome Center confirmed was smoked, and likely grown in the region, by at least A.D. 860.

Perhaps more importantly, the researchers say that additional studies may help them better understand the origins of and the human management, geographic range extension and cultivation of tobacco. Indeed, as part of a second study, the authors have recently detected nicotine in ancient pipes from an 800-year-old site in the modern city of Pleasanton, Calif.

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Prior to this recent testing, which used sensitive gas chromatography/mass spectrometry, researchers were unsure of the historical use of tobacco on the Coast. It was unclear, for example, whether European traders had brought tobacco to the area much later, or if some other plant had been smoked in the pipes, Tushingham said.

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We will make our skies blue again.
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Rouslan Krechetnikov和Hans Mayer对液体的溅出现象进行了研究。他们考察的课题是:人们在端着咖啡杯走动时咖啡的溅出情况,给你个提示吧,在你走到第七步至第十步之间,咖啡最容易溅出。
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尽管曾在8月份做出让人民币贬值的不了了之的尝试(此举震撼了全球市场,很快就被北京方面放弃),但9月份中国的贸易加权汇率同比上升8.5%,这意味着中国出口产品的竞争力有所减弱。

Judge for yourself.
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The study is available online.


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不会。当然,这种情况可能发生,但是只要运气不是太差,梅眼下至少可以确保英国经济不会在2019年因掉落“无协议”悬崖而急剧下滑。2017年12月,“共识预测”(Consensus Forecasts)预测2018年英国将增长1.5%。该机构对日本和意大利的预测值更低,为1.3%。因此英国明年成为G7中经济增长最慢国家的几率应该在四分之一左右。

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Citation: Researchers uncover earliest tobacco use in the Pacific Northwest (2013, March 1) retrieved 18 November 2020 from https://phys.org/news/2013-03-uncover-earliest-tobacco-pacific-northwest.html
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