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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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不过,如果把10月份看做一个整体,则只有深圳房价真正出现了环比下滑。
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刘易斯呼吁那些不能再照顾自己宠物的人们要联系家人、邻居或者动物收容所来接手这些动物。

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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显然相信“更长时间保持较低位”如今意味着“永远保持较低位”的投资者,最近几周已经涌向新兴市场资产。

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埃尔多安在国内也受益于与吕特的争执,他寻求将外交争端扩大至针对所有欧盟国家,尤其是德国,后者同样因土耳其在德国的大型土耳其社区拉票而与安卡拉发生争执。

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然而,这可能被欧洲和中国的投资下滑抵消,如果中国打算在一定程度上由投资于资源耗费高的建设项目,转向投资于水净化等对大宗商品依赖不强的基础设施项目,那么中国投资对全球贸易的影响将会加大。
“然而,考虑到政策紧缩的延迟影响,以及房地产市场降温将在未来数个季度压制中国对大宗商品的需求,我们怀疑出口的增长势头是否还能维持下去。”
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The study is available online.


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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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