Researchers at the University of Chicago have found genetic evidence to support the sodium-retention hypothesis, a controversial 30-year-old theory that the high rate of hypertension in certain ethnic groups is caused, in part, by an inherited tendency to retain salt.
In the December issue of the American Journal of Human Genetics, (available now on-line) the researchers show that the frequency of one version of a gene that plays a crucial role in salt retention correlates with distance from the equator. Populations that live in hot, humid climates near the equator tend to have the normal version of that gene, which produces a very effective protein. Populations adapted to cooler climates tend to have a mutant gene that codes for a totally dysfunctional protein.
"The surprise," said study author Anna Di Rienzo, Ph.D., associate professor of human genetics at the University of Chicago, "was finding that as populations moved away from the tropics the original or normal version of the gene became less and less common and the broken version more frequent, which suggests it is protective. There seems to be a strong selective advantage conferred by the non-functioning protein, and that advantage increases with latitude."
John Easton | EurekAlert!
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From June 25th to 27th 2019, the Fraunhofer Institute for Digital Media Technology IDMT in Ilmenau (Germany) will be presenting a new solution for acoustic quality inspection allowing contact-free, non-destructive testing of manufactured parts and components. The method which has reached Technology Readiness Level 6 already, is currently being successfully tested in practical use together with a number of industrial partners.
Reducing machine downtime, manufacturing defects, and excessive scrap
The quality of additively manufactured components depends not only on the manufacturing process, but also on the inline process control. The process control ensures a reliable coating process because it detects deviations from the target geometry immediately. At LASER World of PHOTONICS 2019, the Fraunhofer Institute for Laser Technology ILT will be demonstrating how well bi-directional sensor technology can already be used for Laser Material Deposition (LMD) in combination with commercial optics at booth A2.431.
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Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
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