共找到 6 条结果
A new chemical process can transform three of the most common plastics into high-purity hydrogen without sorting them first。 The technique operates at much lower temperatures than traditional gasification and captures most of the plastic’s carbon in solid or liquid forms instead of releasing it as carbon dioxide
Deep beneath submarine volcanoes, Earth may be running a natural “gold kitchen。” By analyzing volcanic glass from the Kermadec island arc north of New Zealand, researchers found that water-rich mantle repeatedly melts beneath subduction zones, gradually concentrating gold in rising magma。 The process works because intense melting breaks down sulfur
Amazon joined a procession of tech giants that ramped up their spending on artificial intelligence, as its capital expenditures soared 69 percent。 Concerns over the industry’s spending are mounting
Ultrafast X-rays revealed how a molecule converts absorbed light into motion in just trillionths of a second。 Individual atoms recorded different stages of the process, opening a powerful new window into light-driven chemistry
New research challenges the decades-old idea that children experience an “adiposity rebound” when their BMI begins rising around age 6。 Although BMI returns to earlier levels, a more reliable measure showed that body fat does not rebound at all。 The increase appears to come from growing muscle and lean tissue as children prepare for later growth