Microscopic Mojave Desert plants growing on the underside of translucent quartz pebbles can endure both chilly and near-boiling temperatures, scavenge nitrogen from the air, and utilize the equivalent of nighttime moonlight levels for photosynthesis, a new study reports. The plants, which receive enough light through the pebbles to support photosynthesis, could offer a model for how plants first colonized land, as well as how they might have evolved on Mars, said the scientists who performed the study.
"Here you have a really bizarre habitat," said William Schlesinger, dean of Duke Universitys Nicholas School of the Environment and principal author of a paper on the study that appears in the December, 2003 issue of the research journal Ecology, which was just published. "When I first went to the site in 1978 I thought: Thats weird, how do these plants photosynthesize? Then it dawned on me that they photosynthesized on the light coming through the rocks."
Years after he first noticed the primitive plants -- mostly species of blue-green algae -- growing under every quartz pebble he turned over at the site in Californias Joshua Tree National Park, Schlesinger assembled a scientific team to investigate the phenomenon. He said what the scientists learned suggests a possible way that land plants established their first toehold in the harsh conditions of the early Earth: by staying under cover.
Monte Basgall | EurekAlert!
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Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
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The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
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With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
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For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.
Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...
At AKL’16, the International Laser Technology Congress held in May this year, interest in the topic of process control was greater than expected. Appropriately, the event was also used to launch the Industry Working Group for Process Control in Laser Material Processing. The group provides a forum for representatives from industry and research to initiate pre-competitive projects and discuss issues such as standards, potential cost savings and feasibility.
In the age of industry 4.0, laser technology is firmly established within manufacturing. A wide variety of laser techniques – from USP ablation and additive...
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27.09.2016 | Life Sciences
27.09.2016 | Physics and Astronomy
27.09.2016 | Life Sciences