Retraction 12 appears for Alirio Melendez, this one for plagiarism

The twelfth of Alirio Melendez’s 20-something retractions has appeared, in Clinical and Experimental Pharmacology and Physiology.

Along with the retraction notice, the journal runs letters from the paper’s two co-authors. Melendez writes:

Update on “greatly enhanced” photonics paper, with two corrections — one by journal, one by us

Last month we wrote about a paper in Nature Photonics that, because of a measurement error, had to be retracted.

It turns out that wasn’t the only problem with the article — but we’re afraid that the glitch requires us to issue a correction.

The article, “Greatly enhanced continuous-wave terahertz emission by nano-electrodes in a photoconductive photomixer,” has listed Aaron Danner as the last — and, we’d assumed — senior author of the paper. But as Danner pointed out to us, that was a mistake by Nature Photonics.

Alirio Melendez notches retractions 10 and 11

Former National University of Singapore and University of Liverpool scientist Alirio Melendez has two more of the 20-something retractions suggested by the investigations into his work. Both appear in the Journal of Biological Chemistry.

Here’s the notice for “FcγRI-triggered generation of arachidonic acid and eicosanoids requires iPLA₂ but not cPLA₂ in human monocytic cells:”

Retraction nine appears for Alirio Melendez

An immunologist found by a former employer to have committed misconduct in more than 20 papers has had another paper retracted.

Here’s the notice for “Refining siRNA in vivo transfection: Silencing SPHK1 reveals its key role in C5a-induced inflammation in vivo,” by Alirio Melendez and colleagues in The International Journal of Biochemistry & Cell Biology:

Findings of “greatly enhanced” optics turn out to be, well, greatly enhanced

The authors of a paper in Nature Photonics have been forced to walk back their article after learning from another group of researchers that their conclusions likely were an, ahem, optical illusion.

The paper, “Greatly enhanced continuous-wave terahertz emission by nano-electrodes in a photoconductive photomixer,” appeared in January 2012 and came from a team led by that included Aaron Danner, an optics expert at the National University of Singapore. As the abstract of the paper explains (to physicists, anyway):

Paper with “missing or placed wrongly” controls retracted because there’s “no editorial mechanism to review the errors”

Two researchers from Singapore are retracting a paper that included errors in three figures because there’s apparently no way to fix the mistakes and have the new work reviewed.

Here’s the notice for “Host-dependent effects of the 3′ untranslated region of turnip crinkle virus RNA on accumulation in Hibiscus and Arabidopsis,” by Weimin Li and Sek-Man Wong of National University of Singapore and Temasek Life Sciences Laboratory:

And then there were eight: Three more retractions for Alirio Melendez, all in the Journal of Immunology

Alirio Melendez, who has already retracted five papers and was found by one of his former universities to have committed misconduct on more than 20, has three more retractions.

Here’s the notice for “Antisense Knockdown of Sphingosine Kinase 1 in Human Macrophages Inhibits C5a Receptor-Dependent Signal Transduction, Ca²⁺ Signals, Enzyme Release, Cytokine Production, and Chemotaxis,” cited 68 times, according to Thomson Scientific’s Web of Knowledge:

Magnets paper fails to stick as plagiarism leads to retraction

A group engineers from Iran and Singapore have been forced to retract a paper in the Journal of Magnetism and Magnetic Materials after the article was found to contain incidents of plagiarism.

The article, “Magnetic properties of iron-based soft magnetic composites with MgO coating obtained by sol–gel method,” appeared in April 2010. Sometime later (we’re getting near the three-year mark from the date of publication) it seems, the journal learned that something was amiss with the paper.

As the notice explains:

NUS: Melendez committed “serious scientific misconduct,” but don’t expect to get any details

Alirio Melendez, a former National University of Singapore immunologist whose story we’ve been following here since a retraction in September of last year, committed misconduct on an “unprecedented” scale, according to the university, involving more than 20 papers.

Nature’s Richard van Noorden has the scoop:

After a 19-month investigation, the National University of Singapore (NUS) today says that it has determined that one of its former scientists, the immunologist Alirio Melendez, has committed “serious scientific misconduct”.  The university found fabrication, falsification or plagiarism associated with 21 papers, and no evidence indicating that other co-authors were involved in the misconduct, it says.

Melendez has retracted five papers so far, as we’ve reported, but NUS wouldn’t give the whole list. They tell Nature:

Retraction number four appears in PNAS for work of Alirio Melendez, who has resigned post at U Liverpool

Alirio Melendez, who has had three of his papers retracted amidst suspicions about 70, has had another one retracted, this one in the Proceedings of the National Academy of Sciences (PNAS). And he has also resigned from his post at the University of Liverpool, we have just learned.

Here’s the notice: