Researchers uncover earliest tobacco use in the Pacific Northwest
(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 tobacco smoking 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 海南商品房销售许可信息查询系统上线 购房人可通过有关网站查询房源信息.
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 tobacco 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 nicotine addiction 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 Pacific Northwest 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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东道主的对手阿根廷队在此次世界杯中也有很大的机会。一支以梅西为主的队伍都会在最后大放异彩，但是当你在队伍中增添类似塞尔吉奥·阿奎罗（Sergio Aguero）、冈萨罗·伊瓜因（Gonzalo Higuan）和埃泽奎尔·拉维奇（Ezequiel Lavezzi）这样的队员的话，那么它将是这届世界杯上最具有进攻打法的球队了。同理，乌拉圭的进攻三人组——路易斯·苏亚雷斯（Luis Suarez）、埃丁森·卡瓦尼（Edinson Cavani）以及迪亚戈·弗兰(Diegol Forlan)同样拥有同等的实力，能对世界上任何一支球队比赛时进球，不过，他们所在队伍中其他人的实力是否足够强还让人存疑。
The study is available online.