They found that 78 % of the uranium-contaminated sites were linked to the presence of nitrate, a common contaminant that originates from chemical fertilizers and farm animal waste mainly. Through a number of bacterial and chemical reactions, nitrate releases naturally occurring uranium, making it soluble. This enables uranium to seep in to the groundwater, the experts explained. The Great Plains aquifer contains uranium concentrations up to 89 times the U.S. Environmental Protection Company standard. And, nitrate concentrations were to 189 times greater than the EPA specifications up, the experts reported. This aquifer provides water to eight says, the researchers said. California’s Central Valley aquifer contains uranium concentrations up to 180 situations the EPA threshold. Nitrate concentrations were up to 34 times greater than the EPA threshold, the study revealed.But that move might not be enough, because the publisher Hindawi uncovered this past spring. Although Hindawi doesn’t let authors suggest reviewers because of their manuscripts, it decided to examine the peer-review records for manuscripts submitted in 2013 and 2014 for possible fraud. The peer-review procedure found in Hindawi’s journals depends mainly on the expertise of its editorial board members and the guest editors of special issues, who are responsible for supervising the overview of submitted manuscripts.5 Since the peer reviewers selected by the guest editors weren’t subject to any sort of independent verification, editors themselves could undermine the process in quite similar way that authors or third-party agencies have done somewhere else: by creating fake reviewer identities and addresses that they submitted positive reviews endorsing publication.