Archive for the ‘ACS’ Category
Chemistry researchers in China have retracted their 2016 paper after reporting that the raw data did not match what they presented in the article.
The authors were attempting to develop a method to produce large amounts of a high-quality two-dimensional form of antimonene, a prized crystal structure that has been notoriously difficult to synthesize reliably.
They were successful, according to the paper, achieving “a large quantity of few-layer antimonene” and demonstrating its “exact atomical structure” and properties.
But they may have spoken too soon. Read the rest of this entry »
Researchers have retracted two 2016 papers from the same journal which were published without the permission of the supervising scientists.
According to the retraction notices, the two Applied Materials & Interfaces articles were “published without the full knowledge or consent of the principal investigators” who guided the research, but are not named in the notices.
The papers share the same three authors, listed in the same order. Last author Fangqiong Tang and middle author Laifeng Li are principal investigators in different labs at the Chinese Academy of Sciences in Beijing. First author Nanjing Hao was formerly in Tang’s research group, but is now at Dartmouth College in New Hampshire.
Here’s the retraction notice for “Fabrication of Carbohydrate-Conjugated Fingerprintlike Mesoporous Silica Net for the Targeted Capture of Bacteria,” which was retracted only months after it was published in November 2016: Read the rest of this entry »
A cancer researcher who sued PubPeer commenters for criticizing his work has lost six more papers, bringing his total to 13 retractions.
Four of the new retraction notices issued by the journal Cancer cite an investigation at Wayne State University in Michigan into the work of Fazlul Sarkar and some of his colleagues. All the new notices, including the other two in Breast Cancer Research and Treatment, are for image-related issues.
Retraction Watch readers will recognize the name Fazlul Sarkar, who took PubPeer to court to unmask the anonymous critics whose comments cost him a job at the University of Mississippi. According to this document, Sarkar retired from Wayne State this year.
One of the studies reported an increased level of air pollution near gas extraction sites, and the other suggested that 2010’s Deepwater Horizon oil spill in the Gulf of Mexico contributed to air contamination.
According to the corresponding author of both papers, Kim Anderson at Oregon State University, the journal plans to publish new versions of both papers in the next few days. In the case of the fracking paper, the conclusions have been reversed — the original paper stated pollution levels exceeded limits set by the U.S. Environmental Protection Agency (EPA) for lifetime cancer risk, but the corrected data set the risks below EPA levels.
The fracking paper received some media attention when it was released, as it tapped into long-standing concerns about the environmental dangers of hydraulic fracturing (fracking), which extracts natural gas from the earth. A press release that accompanied the paper quoted Anderson as warning: Read the rest of this entry »
The correction replaces an expression of concern on the Journal of the American Chemical Society (JACS) paper, which followed allegations of data manipulation. It provides some un-cropped images, and removes a co-author from the paper. However, it does not appear to address previous allegations of misconduct, nor a recent ruling from an investigation at Hong Kong University (HKU), which found that some of the data were “invalid.”
A pair of chemical engineers has retracted a paper after another researcher was unable to replicate their work, in a case that we consider an example of doing the right thing.
Dennis Prieve, at Carnegie Mellon University, was interested in applying the paper — on how systems of molecules known as “reverse micelles” conduct electrical charge — to his own work, but was having trouble repeating the calculations. So Prieve contacted the authors — John Berg and his PhD student Edward Michor, based at the University of Washington — who supplied him with their original data.
It took several weeks of back and forth to figure out the problem, Michor told us, as the paper was published in 2012, so he had to decipher his old notes. When they found that several incorrect values were used in the paper, the authors issued a retraction notice, published in March:
Specifically, it appears as if Rodrigo J.G. Lopes made up the affiliations of multiple co-authors from the California Institute of Technology, causing the journal to “doubt the existence of the authors.”
Lopes first came to our attention in 2013, when he lost a paper in the Chemical Engineering Journal for including data he couldn’t have produced, as the lab lacked the necessary equipment. That had followed a previous retraction, when Lopes added co-authors without their permission. We’ve since found other retractions for Lopes, bringing his total to eight, by our count. Read the rest of this entry »
A paper on nanoparticles that target cancer cells has been retracted for duplicating figures from three other papers.
The articles all share a first author: Manasmita Das, based at the time of the research at the Indian Institute of Technology Kharagpur and the National Institute of Pharmaceutical Education and Research (NIPER). According to her LinkedIn profile, she is currently a postdoc at the University of North Carolina.
The abstract of the 2011 Bioconjugate Chemistry paper explains just what the new nanoparticles would be useful for:
Multifunctional nanoparticles, developed in the course of the study, could selectively target and induce apoptosis to folate-receptor (FR) overexpressing cancer cells with enhanced efficacy as compared to the free drug. In addition, the dual optical and magnetic properties of the synthesized nanoparticles aided in the real-time tracking of their intracellular pathways also as apoptotic events through dual fluorescence and MR-based imaging.
But according to the retraction note, figure duplications “seriously undermine the conclusions presented in the research article.” Here’s more about the source of those duplications from the full note: Read the rest of this entry »
In 2014, school officials revoked Suvi Orr‘s degree after finding it was based, in part, on falsified data. Some of the data were also included in a paper in Organic Letters that was retracted in 2011 after some steps in the chemical synthesis the authors described were not reproducible. Orr, currently working at Pfizer, sued UT, and the school reinstated her degree.
Now, the school is trying to remove it again, according to the lawsuit, filed last week. The lawsuit says the school has scheduled a “hearing” on March 4, during which three undergraduate students and two faculty members will deliberate — “none of whom are qualified to evaluate the scientific evidence being used against S.O.,” the suit says.
Orr has requested a temporary injunction to halt the proceedings, and a hearing has been scheduled for next week, according to the Austin-American Statesman.
The suit argues the school does not have the right to strip Orr’s degree from her: Read the rest of this entry »
An engineer has retracted three papers on a method for making nanoscale materials that are useful in solar cells.
The papers, all published in ACS Applied Materials & Interfaces, contain irregularities in data, and one includes images “which have been published elsewhere and identified with different samples,” according to the note.
The first author on all three papers is Khalid Mahmood, who — according to the bio from a talk he gave last year on efficient solar cells — is currently a postdoc at King Abdullah University of Science and Technology in Saudi Arabia. He did the work in the retracted papers while a student at the Korea Advanced Institute of Science and Technology, where, according to the bio, he completed his PhD in two years.