Researchers have for the first time identified the function of olfactory receptors in the human heart muscle, such as are also present in the nose. One of the receptors reacts to fatty acids that occur in the blood, in patients with diabetes significantly above the normal range. If a fatty acid activates the receptor, it triggers a negative effect: the heart rate and the force of muscular contraction are reduced. The team headed by Dr Nikolina Jovancevic and Prof Dr Dr Dr habil. Hanns Hatt from Ruhr-Universität Bochum has published its findings in the journal “Basic Research in Cardiology”.

Spiders were collected using trunk traps (Image by YANG Xiaodong)

Previous studies showed that the species richness of vertebrates and arthropods has significantly decreased in rubber plantations compared to natural forests in Xishuangbanna. Shifts in plant composition caused by land-use changes may directly and/or indirectly affect spider assemblages. However, changes in spiders associated with tree trunks following land-use changes have not yet been examined in tropical regions.

The researchers simulated supernova conditions by sending a rocket into sub-orbit where it was mostly free from the effect of gravity. The S-520-28 rocket was launched from JAXA’s Uchinoura Space Center on December 17th, 2012. In the three years to follow, the researchers conducted additional micro-gravity experiments using aircraft to gather and analyze data.

Pure iron grains in interstellar space are far rarer than previously thought, shedding new light on the evolution history of matters in the universe. Scientists are unsure what form iron takes in outer space even though it is one of its most abundant refractory elements. Extensive analysis of meteorites and other measurements show only low levels of gaseous iron and solid iron compounds, such as iron oxides, sulfides and carbides. That leaves a substantial amount of iron missing, given how much is expected to exist in the universe. Scientists surmise that if iron is not combining with other particles, it might be forming pure metal which is invisible in outer space.

Two species of the Flabegraviera genus: Flabegraviera fujiae (left), the new species discovered in the study, and Flabegraviera mundata (right). Scale bar: 1cm./blog/new-species-discovered-in-antarctica/

A team of Japanese scientists has discovered a new species of polychaete, a type of marine annelid worm, 9-meters deep underwater near Japan’s Syowa Station in Antarctica, providing a good opportunity to study how animals adapt to extreme environments.

Foto: Frank-Glaw

Fish-scale geckos in the genus Geckolepis are able to lose their skin at the slightest touch.

Many lizards can drop their tails when grabbed, but one group of geckos has gone to particularly extreme lengths to escape predation. Fish-scale geckos in the genus Geckolepis have large scales that tear away with ease, leaving them free to escape whilst the predator is left with a mouth full of scales. Scientists led by Mark D. Scherz (LMU Munich) and Dr. Frank Glaw (Zoologische Staatssammlung München) have now described a new species (Geckolepis megalepis) that is the master of this art, possessing the largest scales of any gecko.

Palaeontologist Jessica Mitchell of the Steinmann Institute, University of Bonn with the thigh bone of the long-necked dinosaur Apatosaurus. © Photo: Volker Lannert/Uni Bonn

How old were the oldest dinosaurs? This question remains largely unanswered. The natural life span of these long-extinct giants is of interest to scientists, in combination with questions regarding how fast they could grow and how they could obtain sufficient nutrients from their habitat. Palaeontologists at the University of Bonn estimate by means of bone structures whether a particular dinosaur fossil is a young, adult or very old animal. The results have now been published in the journal Paleobiology.

The many different organisms from all participating partners were all mounted in such trays and then exposed to space on the outside of the ISS for one and a half years. © ESA/ROSCOSMOS | Picture in color and printing quality: www.fraunhofer.de/en/press

In a long-term experiment on the International Space Station, Fraunhofer researchers studied how the extreme conditions in space affect algae. Fraunhofer conducted this experiment in close cooperation with German and international partners. Research findings could benefit industrial applications and perhaps a mission to Mars.

L’esposizione alle previsioni dei modelli climatici ha meno effetto su policymaker e negoziatori che su un pubblico informato, secondo un articolo di Valentina Bosetti e co-autori. Ma il giusto formato di presentazione può migliorare l'efficacia delle previsioni.

Migratory birds like the garden warbler are hormone-controlled. (Photo: Wolfgang Goymann)

Migratory birds often stop along their long journeys to replenish their fat stores. The purpose of these stopovers – rest and refuelling – is clear. To date, however, it had been unclear which physiological signals triggered the birds’ decision to continue their flight. A team led by researchers from Vetmeduni Vienna has now identified, for the first time, the hormone ghrelin as a signal for the birds’ brains. Ghrelin, which is known to be an appetite-regulating hormone in humans, was measured at high levels in satiated garden warblers. Moreover, birds injected with additional ghrelin exhibited decreased appetite and increased the highly active state of migratory restlessness. The results, which were published in the journal PNAS, confirm the hormonal influence on avian migratory behaviour and could even lead to an improved understanding of eating disorders among humans.

A study has found that fiscal policies introduced by governments in developing countries can have a significant effect on lowering harmful carbon emissions and help counties with fulfilling their commitments under the UNFCCC Paris Agreement.

The research, due to publish in the journal Climate Policy, used Brazil as a case study and found that even early-stage ad hoc measures could be key to reducing emissions in the efforts to meet greenhouse gas mitigation targets.