A study by biological anthropologists at University of Kent has revealed that contemporary, British women who believed they had a longer time to live, were more likely to give birth to a son than women who thought that they would die earlier. According to Dr Sarah Johns, who led the research, this may be because it requires more effort to be pregnant with, give birth to, and raise a son to adulthood.
The study, which is published today in the journal Biology Letters, suggests that the sex ratio even in a relatively affluent, Western setting can be influenced by how a woman views her future health and environment. Earlier studies have shown that poorly nourished mothers were more likely to give birth to girls, but this was a link that has only been established in developing countries.
The findings are a result of a survey of British women who had recently become mothers. More 600 women in Gloucestershire were asked to what age they expected to live. The results indicate that people’s perception of their future wellbeing influences the proportion of sexes in the population.
Karen Baxter | alfa
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127 at one blow...
18.01.2017 | Stiftung Zoologisches Forschungsmuseum Alexander Koenig, Leibniz-Institut für Biodiversität der Tiere
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Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
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Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
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