“Researchers…have carried out the first comprehensive assessment of the relative merits of different geoengineering schemes in terms of the climate cooling potential…Climate geoengineering proposals seek to combat the effects of climate change—in particular to counteract the effects of increased CO2 in the atmosphere. There are two basic approaches proposed: reducing the atmospheric absorption of incoming solar (shortwave) radiation, or removing CO2 from the atmosphere and transferring it to long-lived reservoirs, thereby increasing outgoing longwave radiation….” Full Slice
Archive for January, 2009
“A team of scientists…has developed a new catalyst that could make ethanol-powered fuel cells feasible. The highly efficient catalyst performs two crucial, and previously unreachable steps needed to oxidize ethanol and produce clean energy in fuel cell reactions….” Full Slice
“Scientists…have discovered that the reactivity of aluminum cluster anions with water—which results in the dissociative chemisorption of water and the production of hydrogen—depends on the geometric structure of the cluster rather than its electronic properties….” Full Slice
“Cloning animals by nuclear transfer provides an opportunity to preserve endangered mammalian species…Here we report production of cloned mice from bodies kept frozen at −20 °C for up to 16 years without any cryoprotection…Thus, nuclear transfer techniques could be used to “resurrect” animals or maintain valuable genomic stocks from tissues frozen for prolonged periods without any cryopreservation.” Full Slice
“…Scientists in the field of structural DNA nanotechnology, including [researcher]’s team, have previously demonstrated that pre-fab DNA elements could be induced to self-assemble, forming useful nanostructural platforms or “tiles.” Such tiles are able to snap together—with jigsaw puzzle-piece specificity—through base pairing, forming larger arrays.
[researcher]’s work…responds to one of the fundamental challenges in nanotechnology and materials science, the construction of molecular-level forms in three dimensions. To do so, the team uses gold nanoparticles, which can be placed on single-stranded DNA, compelling these flexible molecular tile arrays to bend away from the nanoparticles, curling into closed loops or forming spring-like spirals or nested rings, roughly 30 to 180 nanometers in diameter….” Full Slice includes video