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Post-measurement compressed calibration for ICP-MS-based metal quantification in mine residues bioleaching source:natureAbstractBioleaching is an actual economical alternative to treat residues, which allows, depending on the chosen strategy, two possible outcomes: (1) a leachate enriched with target metals, or (2) a residue enriched in target metals through the leaching of interfering components (IC). This work aimed to study the metals released by bioprocessing the Panasqueira mine tailings, as a strategy to increase critical metals' relative concentration in residues. Biostimulatio...
Release time: 2022 - 09 - 27
source:cnetFrom weddings to Independence Day celebrations, sparklers are a hot choice for bringing some light, fire and fun to a party. A team of researchers experimented with new recipes for sparklers and came up with some wild color-changing and branching pyrotechnic effects.There are already sparklers on the market that change colors as they burn down, but these new formulations change mid-spark. The secret is in the materials that burn. Combining the rare-earth metal ytterbium with copper created a shower of long sparks that turned from gold to green. The American Chemical Society (AC...
Release time: 2022 - 09 - 26
source:natureAbstractIntrinsic defects are known to greatly affect the structural and electronic properties of scintillators thereby impacting performance when these materials are in operation. In order to overcome this effect, an understanding of the defect process is required for the design of more stable materials. Here we employed density functional theory calculations and the PBE0 hybrid functional to study the structural, electronic,defect process and optical properties of Bi4Ge3O12 (BGO), a well know material used as scintillator. We examined possible intrinsic defects and calculated th...
Release time: 2022 - 09 - 23
source:phys.orgSparklers can be a lot of fun—glimmering, fizzing and spitting out arcs of light from handheld sticks or tubes on the ground. But the metals that they're usually made with limit what the sparks can look like. Now, researchers in ACS Omega report that rare-earth metals in alloy powders can produce flashes that shift from golden to green and continuously branch.Around the world, sparklers are brought out for holidays and special events, providing celebratory pops of light. While their flames can span the colors of rainbow, the flares shooting out have been limited to dark red,...
Release time: 2022 - 09 - 22
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