Category: chemistry retractions

That study reporting worrisome levels of zinc in tuna? It’s being retracted

Recently, a rash of news outlets posted concerns that canned tuna and other products may contain potentially dangerous levels of zinc. They were all wrong.

News outlets such as The Daily Mail and The Sun reported findings from a recent study, which showed that canned foods such as tuna may contain 100 times the daily limit of zinc — raising concerns about how such huge doses of the mineral could be causing digestion problems. The last author of the study told Retraction Watch the paper is going to be retracted, because the authors made a fundamental error calculating the amount of zinc present in canned foods.

Last week, the UK’s biggest health website NHS Choices posted a critique of the paper, in which they recalculated the levels of zinc present in canned foods:

Continue reading That study reporting worrisome levels of zinc in tuna? It’s being retracted

Chemistry journal retracts highly criticized paper

A chemistry journal has retracted a nanoparticle paper following heavy outcry from readers, who alleged the paper contained signs of obvious manipulation.

After the paper appeared in 2017, one critic lamented it contained “obviously fabricated” images, and asked the journal to retract it. Another suggested the presence of one image merited “an instant lifetime ban.”

The first comment about the paper appeared on PubPeer three months ago; earlier this month, the journal ACS Biomaterials Science & Engineering retracted the paper.

Here’s the notice:

Continue reading Chemistry journal retracts highly criticized paper

Author under fire on PubPeer issues puzzling correction to chem paper

A researcher whose work has been heavily questioned on PubPeer has corrected a figure on a 2015 paper in Talanta — but the text of the correction doesn’t match the actual changes.

Recently, Rashmi Madhuri at the Indian Institute of Technology (Indian School of Mines) in Dhanbad corrected a 2015 paper about a diagnostic sensor that uses nanoparticles, noting that there was a “small error” in the legend describing figure 1. But the corrected image bears the same legend it had before, and instead swapped a panel of the figure that had been questioned on PubPeer.

Here’s another puzzling element to the story: Gary Christian at the University of Washington, one of the editors-in-chief of the journal, tells us he doesn’t “recall being aware of the corrigendum:”

Continue reading Author under fire on PubPeer issues puzzling correction to chem paper

Author retracts 2009 chemistry paper with “heavily doctored” images

A researcher has retracted a 2009 chemistry paper after discovering that a figure had been “inappropriately edited.”

According to the journal, a reader brought the images in question in Figure 1 to the editors’ attention last September. Timothy P. Lodge, distinguished professor at the University of Minnesota in Minneapolis — and editor of Macromolecules through December 2017 — told Retraction Watch:

Continue reading Author retracts 2009 chemistry paper with “heavily doctored” images

They thought they might solve the world’s energy problems. Then they realized they were wrong.

Frederick MacDonnell

Researchers are retracting a 2016 PNAS paper that described a way to create gasoline-like fuels directly from carbon dioxide in the atmosphere.

Senior author Frederick MacDonnell, a professor at the University of Texas at Arlington (UTA), told us he originally thought his team had made a preliminary breakthrough that might “solve the world’s energy problems.” Instead, he said:

It was an elaborate trap we fell into.

In a retraction notice that contains more information than we usually see, MacDonnell and his co-authors wrote: Continue reading They thought they might solve the world’s energy problems. Then they realized they were wrong.

Scientist to chemistry journal: “Plse retract this ms ASAP”

The presence of allegedly obvious manipulations in a 2017 chemistry paper has prompted a reader outcry.

Over the last couple of days, a user on PubPeer and others on Twitter have accused the paper of containing clear duplications; the paper was already corrected in August, in which one scientist alleges the authors replaced “an obviously fabricated” figure with a “slightly better photo-shopped one.”

In response, the editor of ACS Biomaterials Science & Engineering, David Kaplan, told us:

Continue reading Scientist to chemistry journal: “Plse retract this ms ASAP”

Chem journal cautions readers about data in three papers

A chemistry journal has issued expressions of concern for three papers after a reader notified the editors of “unexplained discrepancies” in the data.

According to the notices, after the editors of Organic & Biomolecular Chemistry confirmed the problems, they contacted the corresponding author on the three papers, Pradeep Kumar—who works at the Council of Scientific and Industrial Research (CSIR)-National Chemical Laboratory in Pune, India—as well as the director of CSIR, Ashwini Kumar Nangia. The institution conducted its own internal review of the spectra and concluded the authors did not intentionally alter them.

Still, the journal and institution could not confirm the accuracy of the data, and the journal published expressions of concern to warn readers about the issues.

Here’s the expression of concern for “A general and concise asymmetric synthesis of sphingosine, safingol and phytosphingosines via tethered aminohydroxylation:”

Continue reading Chem journal cautions readers about data in three papers

Chemistry journal issues correction longer than original paper

A 2011 chemistry paper required corrections so extensive that the author published the changes as a second, longer paper.

Both papers, published in the Chinese Journal of Chemistry, described the synthesis of a protein molecule with potential therapeutic applications in cancer. But when the paper’s corresponding author Yikang Wu tried to continue the work, he discovered that a substantial part of the 2011 study was incorrect.

The original paper is not marked with any editor’s note, even though the new paper — which is three pages longer than the 2011 version — acknowledges it is a “partial retraction/correction of previous results.” The new paper does appear in the list of “related content” for the 2011 article.

Given the errors, in the 2017 paper, Wu and his co-authors write: Continue reading Chemistry journal issues correction longer than original paper

Nature Chemistry issues its first retraction

For the first time in its eight-year history, Nature Chemistry has retracted a paper, citing “data integrity issues.”

The 2010 paper, which explored how various iron-based molecules interact with water and ethanol, was withdrawn after the authors uncovered possible duplication in two images.

According to the retraction notice, the authors could not provide the raw data to confirm their findings and could not reproduce the figures because the experimental set-up had been dismantled. The authors subsequently requested the paper be retracted because the issues undermined “our full confidence in the integrity of the study.”

Here’s the retraction notice for “Charge transfer to solvent identified using dark channel fluorescence-yield L-edge spectroscopy”: Continue reading Nature Chemistry issues its first retraction

“Searching our souls”: Authors retract paper after researcher admits to fabricating data

Researchers at a prominent Japanese university have retracted a 2016 paper in a chemistry journal after the first author admitted to scientific misconduct.

According to the notice, Kyushu University investigated and verified that the first author had committed scientific misconduct.

We requested a copy of the misconduct report, which revealed that the researcher, Prasenjit Mahato, a postdoctoral fellow at Kyushu University who is no longer affiliated with the university, “admitted to falsifying research” in two papers on which he was first author: a highly cited 2015 paper in Nature Materials, which was retracted in 2016, as well as the 2016 paper in Journal of the American Chemical Society (JACS), retracted earlier this month. The university investigated and confirmed misconduct in both papers.

We covered the Nature Materials retraction last year, but at the time, the paper’s corresponding author, Nobuo Kimizuka, only told us that the “matter has been under investigation by the formal investigation panel of our University.”

According to the five-page misconduct report — which we translated from Japanese using One Hour Translation and is also available in Japanese on the university’s website — in July 2016, a member of the lab (“Faculty Member B”) began to suspect a problem after he reviewed the data with Mahato (“the defendant”): Continue reading “Searching our souls”: Authors retract paper after researcher admits to fabricating data