Natural rubber is currently technically unavoidable for some purposes, despite the competition from synthetic rubber. Most notably, it accounts for 75% of the rubber used in the tyre industry. However, although Hevea brasiliensis originated in the Amazon Basin, rubber growing has only really developed in Asia and Africa. In Latin America, “South American leaf disease”, caused by the fungus Microcyclus ulei, has until now totally prevented the development of rubber growing, or at least almost totally: rubber trees have become resistant to the fungus in some areas of Amazonia. However, to date, there have never been any varieties that combine parasite resistance and productivity. This could be disastrous for rubber growing worldwide were the fungus to be introduced accidentally into Asia or Africa.
Resistant and high-yielding rubber plants in quarantine at CIRAD
The threat is on the verge of being overcome. In late December 2005, plants of thirteen high-yielding rubber varieties resistant to Microcyclus were shipped to CIRAD from Michelin’s Itubera estate in Brazil. They are now in quarantine in a confinement zone, where they will remain for two years and undergo a range of tests to ensure that they do not carry any spores of the parasite.
Jérôme Sainte-Beuve | alfa
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10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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24.02.2017 | Earth Sciences
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