共查询到20条相似文献，搜索用时 31 毫秒
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Culliton BJ 《Science (New York, N.Y.)》1972,175(4028):1348-1350
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Walsh J 《Science (New York, N.Y.)》1974,183(4126):727-732
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Fractions from used crankcase oil enriched in polyaromatic hydrocarbons induced revertant colonies in Salmonella typhimurium strain TA 98 when activated by rat or trout liver extracts. The mutagenic activity was not due to benzopyrene or benzanthracene. Fractions from various crude and refined petroleums were nonmutagenic. Among various petroleum hydrocarbons entering inland and coastal waters, used crankcase oils may represent a major mutagenic burden. 相似文献
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McClain EF 《Science (New York, N.Y.)》1970,169(3950):1031
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Blue-green algae: why they become dominant 总被引：26，自引：0，他引：26
J Shapiro 《Science (New York, N.Y.)》1973,179(71):382-384
The injection of carbon dioxide and the addition of nitrogen and phosphorus to a lake population dominated by blue-green algae results in a rapid shift to dominance by green algae. The basis for the change and its implications are discussed. 相似文献
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Blumer M 《Science (New York, N.Y.)》1972,176(4040):1257-1258
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Kolata GB 《Science (New York, N.Y.)》1977,196(4291):747-800
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Wuethrich B 《Science (New York, N.Y.)》2000,288(5469):1156-1159
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Terrestrial vertebrate fossils show that part of the Newark supergroup of the eastern United States, all of the Glen Canyon group of the southwestern United States, and the Upper Stormberg group of southern Africa are Early Jurassic. This new correlation demonstrates that the supposed widespread tetrapod extinction at the Triassic-Jurassic boundary is an artifact of spurious correlation. 相似文献