We have an update on the case of Olav and Axel Gressner, a father-son (or, in this case, son-father) pair of German liver researchers caught up in a fraud investigation. The inquiry focused on Olav, who left the University of Aachen under a cloud of suspicion. A 2008 research letter on which he was a co-author (his father was senior author) was retracted earlier this year by the Journal of Hepatology.
Thrombosis and Haemostasis has issued an “expression of concern” over a 2004 paper by Tunisian researchers:
Concerns have been raised by readers about the accuracy and validity of the data reported in the September 2004 article by Abdelkefi et al., entitled “Prevention of central venous line-related thrombosis by continuous infusion of low-dose unfractionated heparin, in patients with haemato-oncological disease. A randomized controlled trial” (Abdelkefi A et al.Thromb Haemost 2004; 92: 654–661).
In the trial, 108 patients with blood cancers reportedly received infusions of either saline or heparin, a blood thinner. Those given the active drug were far less likely to develop clots related to their catheters, according to the researchers, and no more likely to experience severe bleeding. In the report, the researchers write:
This is the first prospective, randomized study, which shows that low-dose of unfractionated heparin is safeand effective to prevent catheter-related thrombosis in patients with haemato-oncological disease.
Although some readers evidently have yawned at revelations that Vahdettin Bayazit, of Alparslan University in Turkey (and, we are tempted to assume, at least a few of his co-authors) appears to have plagiarized wantonly in numerous published articles, one follower of Retraction Watch was on to this case even before we were.
In an e-mail, the tipster laid out a picture of intellectual dishonesty audacious for both its scope and ham-handedness. The researcher, who wanted to remain anonymous, used Google to detect instances of plagiarism, just as we had, coming up with “more than 10” papers with passages stolen from the scientific literature and even Wikipedia, including not only lifted text but figures, too. And, just as in our case, the editors our source contacted about the misconduct have essentially ignored it.
The Office of Research Integrity has thrown a heavy book at Bengu Sezen, a former chemist at Columbia University, alleging that school and agency investigators turned up 21 instances of research misconduct by the disgraced scientist.
The Bosnian Journal of Basic Medical Sciences has retracted a paper it published in August by Turkish researchers on the potential cancer risks associated with exposure to electromagnetic fields, or EMFs.
This morning we reported on a new retraction in Cell involving fraud from a lab in Finland, which led us to a second retraction of a paper by the same group in the Journal of Molecular Biology. The first author on both papers was Tatjana Degenhardt, who at the time was a graduate student in the lab of Carsten Carlberg, professor of biochemistry at the University of Kuopio.
Call it bad luck, but the journal Cell has been victimized again by image manipulation. For the second time this month, the publication has retracted a paper whose authors acknowledged that one of them had played around with the figures.
transcriptional cycling, i.e., periodic assembly of transcription factors and their cofactors and the resulting cyclical accumulation of mRNA, may stem from stochastic timing and sequential activation of transcription in individual cells.
It’s a busy week at Science. The journal is retracting a controversial paper about which it had previously expressed doubts, and has published an “Expression of Concern” about another article that looks like it might be headed for the same fate.
First, the retraction.
The move involves an October 2009 paper, on which we’ve previously posted, by European researchers who claimed to have made a major advance in the ability to watch how enzymes behave in cells — thereby giving scientists a new tool for monitoring the function of genes.
The journal Cell has retracted a paper on fruit fly genetics over concerns that the first author, a postdoc in a German laboratory, might have manipulated dozens of electron micrographs in the manuscript.