Loggerhead sea turtles may be getting sick because of environmental exposure to toxic organic chemicals, such as polychlorinated biphenyls (or PCBs) and pesticides, according to a new study led by Duke University, with collaboration from the National Institute of Standards and Technology (NIST), and other organizations.
Jennifer Keller prepares to take a blood sample from a loggerhead sea turtle as part of her doctoral studies at Duke University. Keller is now a NIST post doctoral researcher.
Photo by Larisa Avens/NMFS
Released on April 21 in the online edition of Environmental Health Perspectives, the study found that turtles with higher concentrations of contaminants had poorer health. The authors note that the correlations suggest, though do not prove, a cause-and-effect link.
The new study is the first to investigate sea turtle health effects linked to a class of chemicals called organochlorines that are known to sicken other wildlife. Scientists took blood and fat samples from 48 live juvenile turtles captured in North Carolina waters and carried out clinical health assessments. Duke then worked with NIST researchers to measure the samples for concentrations of 80 different PCB and pesticide compounds. The research team found significant correlations for a wide variety of biological functions, suggesting, for example, changes in the immune system, possible liver damage, and possible alterations in protein and carbohydrate regulation.
Laura Ost | EurekAlert!
5000 tons of plastic released into the environment every year
12.07.2019 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
Climate impact of clouds made from airplane contrails may triple by 2050
27.06.2019 | European Geosciences Union
Adjusting the thermal conductivity of materials is one of the challenges nanoscience is currently facing. Together with colleagues from the Netherlands and Spain, researchers from the University of Basel have shown that the atomic vibrations that determine heat generation in nanowires can be controlled through the arrangement of atoms alone. The scientists will publish the results shortly in the journal Nano Letters.
In the electronics and computer industry, components are becoming ever smaller and more powerful. However, there are problems with the heat generation. It is...
Scientists have visualised the electronic structure in a microelectronic device for the first time, opening up opportunities for finely-tuned high performance electronic devices.
Physicists from the University of Warwick and the University of Washington have developed a technique to measure the energy and momentum of electrons in...
Scientists at the University Würzburg and University Hospital of Würzburg found that megakaryocytes act as “bouncers” and thus modulate bone marrow niche properties and cell migration dynamics. The study was published in July in the Journal “Haematologica”.
Hematopoiesis is the process of forming blood cells, which occurs predominantly in the bone marrow. The bone marrow produces all types of blood cells: red...
For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.
Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...
An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".
The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...
24.06.2019 | Event News
29.04.2019 | Event News
17.04.2019 | Event News
19.07.2019 | Physics and Astronomy
19.07.2019 | Physics and Astronomy
19.07.2019 | Earth Sciences