60秒科学:Hudson Plane:Out-of-Town Geese Did It
Back on January 15th, US Airways 1 Flight 1549 made that amazing water landing in the Hudson after both engines were taken out by Canada geese, which can weigh eight pounds each. Now scientists have used forensic 2 techniques to clear local geese—the perpetrators were out-of-towners. The study appears June 8th in the journal Frontiers in Ecology and the Environment.
Crash investigators 3 sent feather samples from the plane’s engines to the Smithsonian, which has a dedicated 4 Feather Identification Lab. The researchers examined the feather’s hydrogen isotopes 6, which include regular hydrogen atoms and hydrogens with additional neutrons 7. The isotope 5 ratios tell you about the bird’s diet. And that tells you where they dined.
The analysis showed that the birds that hit the plane were much closer to geese migrating from Canada’s Labrador region than the geese who live year-round in New York. That info could be important for strategies to avoid future bird strikes. The usual techniques for keeping resident birds away from planes are still working—but we need ones for strangers just passing through.
—Steve Mirsky
- The giant jets that increasingly dominate the world's airways. 越来越称雄于世界航线的巨型喷气机。
- At one point the company bought from Nippon Airways a 727 jet. 有一次公司从日本航空公司买了一架727型喷气机。
- The report included his interpretation of the forensic evidence.该报告包括他对法庭证据的诠释。
- The judge concluded the proceeding on 10:30 Am after one hour of forensic debate.经过近一个小时的法庭辩论后，法官于10时30分宣布休庭。
- This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
- The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
- He dedicated his life to the cause of education.他献身于教育事业。
- His whole energies are dedicated to improve the design.他的全部精力都放在改进这项设计上了。
- The isotope ratio is directly used for comparing oils or gases.同位素比率直接用于比较各种石油或天然气。
- How to apply a radio isotope?如何运用放射性同位素？
- the many isotopes of carbon 碳的诸多同位素
- Tritium is one of the mildest radioactive isotopes. 氚是最和缓的放射性同位素之一。 来自《简明英汉词典》