Chemistry 版 (精华区)
发信人: loafer (习惯决定命运), 信区: Chemistry
标 题: Columbia Lab Retracts Key Catalysis Papers
发信站: BBS 哈工大紫丁香站 (Fri Apr 14 11:38:09 2006)
Columbia Lab Retracts Key Catalysis Papers
发信站: 饮水思源 (2006年04月13日14:50:22 星期四)
Robert F. Service
For synthetic chemists working to craft new molecules, a carbon atom surrounde
d by hydrogens can be as hard to handle as a greased pig. Undaunted, in recent
years researchers have scrambled to devise schemes for plucking select hydrog
ens off carbon and replacing them with other atoms that offer an easier handho
ld. A pioneer of this subfield, known as C-H activation, Columbia University c
hemist Dalibor Sames has developed a wealth of advances along with his group m
embers. But some of the lab's results are now in doubt.
Last week, the Journal of the American Chemical Society (JACS), a leading chem
istry journal, printed corrections for three papers from the Sames lab. Two of
the papers on C-H activation catalysts were fully retracted, and part of a th
ird was withdrawn. In each case, the retractions say that the work was disavow
ed after Sames group members could not reproduce the results following the dep
arture of Bengü Sezen, a former Sames group graduate student, who was the lea
d author of the two retracted papers and a co-author of the third. JACS Editor
Peter Stang says the corrections came at the request of the Sames group. Same
s did not reply to repeated phone and e-mail messages from Science.
Susan Brown, Columbia's director of public affairs, says the university has la
unched a review of the case, but that she cannot comment on its scope or timin
g. "It's our policy not to comment on reviews while they are ongoing, so the i
ntegrity of the process can be maintained," Brown says.
In an e-mail exchange, Sezen, who is now a Ph.D. candidate in the group of Uni
versity of Heidelberg molecular biologist Elmar Schiebel, according to the gro
up's Web site, says the retractions came as a surprise. "Professor Dalibor Sam
es or anyone else from Columbia University did not contact me regarding the re
tractions," she says. For the two retracted papers, Sezen named two other Same
s group members who she says repeated her work while she was out of town. For
the third paper, Sezen says her contribution was "limited to an intellectual o
ne." But Kamil Godula, one of the Sames group members Sezen cited, says in an
e-mail that the reactions worked only when Sezen was in town. The other Sames
group member Sezen mentioned did not return messages from Science.
Justin Du Bois, a synthetic chemist at Stanford University in California, call
s the retractions "a bit of a blow" to the subfield of C-H activation: "These
were definitely important papers," he says. Sezen has at least five publicatio
ns on C-H activation with Sames in addition to those corrected in JACS. Benjam
in Lane, a former Sames group member now working as a chemist with the pharmac
eutical company Biogen in Cambridge, Massachusetts, says some of Sezen's work
has been replicated and has been used by chemists in the pharmaceutical indust
ry. Says Lane, "She has done some good things and made an impact on the field.
"
--
爱一个人要了解,也要开解;要道歉,也要道谢;要认错,也要改错;要体贴,也要
体谅;是接受,而不是忍受;是宽容,而不是纵容;是支持,而不是支配;是慰问,而不
是质问;是倾诉,而不是控诉;是难忘,而不是遗忘;是彼此交流,而不是凡事交代;是
为对方默默祈求,而不是向对方诸多要求;可以浪漫,但不要浪费;可以随时牵手,但不
要随便分手。
※ 来源:·哈工大紫丁香 http://bbs.hit.edu.cn·[FROM: 133.87.245.139]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
页面执行时间:2.652毫秒