24小时热门版块排行榜    

Znn3bq.jpeg
查看: 1710  |  回复: 17
当前主题已经存档。
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

sagaman

木虫 (著名写手)

[交流] 南大新出两篇Science文章

Research Articles 封面文章
A Swimming Mammaliaform from the Middle Jurassic and Ecomorphological Diversification of Early Mammals
Qiang Ji,1,3 Zhe-Xi Luo,2,1* Chong-Xi Yuan,3 Alan R. Tabrum2
A docodontan mammaliaform from the Middle Jurassic of China possesses swimming and burrowing skeletal adaptations and some dental features for aquatic feeding. It is the most primitive taxon in the mammalian lineage known to have fur and has a broad, flattened, partly scaly tail analogous to that of modern beavers. We infer that docodontans were semiaquatic, convergent to the modern platypus and many Cenozoic placentals. This fossil demonstrates that some mammaliaforms, or proximal relatives to modern mammals, developed diverse locomotory and feeding adaptations and were ecomorphologically different from the majority of generalized small terrestrial Mesozoic mammalian insectivores.

1 Department of Earth Science, Nanjing University, Nanjing 200017, China.
2 Carnegie Museum of Natural History, Pittsburgh, PA 15213, USA.
3 Chinese Academy of Geological Sciences, Beijing 100037, China.


* To whom correspondence should be addressed. E-mail: LuoZ@CarnegieMNH.org




Reports
X-ray Flares from Postmerger Millisecond Pulsars
Z. G. Dai,1* X. Y. Wang,1 X. F. Wu,2 B. Zhang3
Recent observations support the suggestion that short-duration gamma-ray bursts are produced by compact star mergers. The x-ray flares discovered in two short gamma-ray bursts last much longer than the previously proposed postmerger energy-release time scales. Here, we show that they can be produced by differentially rotating, millisecond pulsars after the mergers of binary neutron stars. The differential rotation leads to windup of interior poloidal magnetic fields and the resulting toroidal fields are strong enough to float up and break through the stellar surface. Magnetic reconnection–driven explosive events then occur, leading to multiple x-ray flares minutes after the original gamma-ray burst.

1 Department of Astronomy, Nanjing University, Nanjing 210093, China.
2 Purple Mountain Observatory and Joint Center for Particle Nuclear Physics and Cosmology of Purple Mountain Observatory–Nanjing University, Chinese Academy of Sciences, Nanjing 210008, China.
3 Department of Physics, University of Nevada, Las Vegas, NV 89154, USA.


* To whom correspondence should be addressed. E-mail: dzg@nju.edu.cn
回复此楼

» 猜你喜欢

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

笨笨鸟

荣誉版主 (知名作家)

good good study, day day up

1

南大一直是俺得偶像
深度潜水
5楼2007-03-13 00:48:56
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 18 个回答

photonic

铁杆木虫 (著名写手)

1

南大的确不错!!!!
近些年来SCIENCE的论文还不少.
南大的路子走对了!
国内同行应好好学习学习!
我为南大感到高兴!
尽管我与南大毫无关系!
2楼2006-02-26 14:42:05
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

sagaman

木虫 (著名写手)

是呀
南大基础研究真是很不错
3楼2006-02-26 14:42:51
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

Kingburg

木虫 (正式写手)

0.5

这样才算是创新的工作。
6楼2007-03-13 19:31:41
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 化学工程调剂289 +36 yang婷 2026-04-07 39/1950 2026-04-09 20:48 by zhouxiaoyu
[考研] 267求调剂 +5 再忙也要吃饭啊 2026-04-09 5/250 2026-04-09 18:47 by stone_128
[考研] 296求调剂 +5 汪!?! 2026-04-09 5/250 2026-04-09 17:47 by 柠檬不酸zy
[考研] 085600材料与化工,求调剂 +11 won_qii 2026-04-07 11/550 2026-04-09 17:03 by luoyongfeng
[考研] 材料工程085601,270求调剂 +26 @ASDF1234 2026-04-08 28/1400 2026-04-09 15:47 by wp06
[考研] 285求调剂 +9 AZMK 2026-04-07 10/500 2026-04-09 10:29 by 小物理化学
[考研] 材料调剂 +4 hzhahg 2026-04-06 4/200 2026-04-08 16:20 by luoyongfeng
[考研] 求调剂 +9 月@163.com 2026-04-07 11/550 2026-04-08 14:48 by qlm5820
[考研] 301求调剂 +10 细胞相关蛋白 2026-04-03 10/500 2026-04-08 10:36 by tjzhao
[考博] 博士申请 +3 IQwQl 2026-04-05 3/150 2026-04-07 20:31 by greychen00
[考研] 327考研调剂推荐 +6 呜呜呜呜呢 2026-04-06 6/300 2026-04-06 21:39 by 啵啵啵0119
[考研] 285求调剂 +5 mapmath 2026-04-06 6/300 2026-04-06 17:18 by 蓝云思雨
[考研] 362求调剂一志愿中国石油大学 +4 我要考大 2026-04-06 6/300 2026-04-06 14:11 by 无际的草原
[考研] 308求调剂 +3 终不似从前 2026-04-05 3/150 2026-04-05 20:07 by 啵啵啵0119
[考研] 301求调剂 +3 XYPLR 2026-04-05 4/200 2026-04-05 19:07 by XYPLR
[考研] 考研调剂 +5 四川王涛 2026-04-04 5/250 2026-04-04 22:18 by 啵啵啵0119
[考研] 292求调剂 +11 2022080213 2026-04-04 13/650 2026-04-04 18:38 by macy2011
[考研] 考研求调剂 +3 木心想继续深造 2026-04-03 3/150 2026-04-03 21:56 by 啵啵啵0119
[考研] 366求调剂 +7 sbdnd 2026-04-03 7/350 2026-04-03 12:40 by cymywx
[考研] 一志愿安徽大学0817化学工程与技术,求调剂 +14 我不是只因 2026-04-02 15/750 2026-04-03 09:49 by 蓝云思雨
信息提示
请填处理意见