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Neodymium isotopes track sources of rare earth

2020-1-15 ensp 0183 ensp Acid mine drainage AMD has been proposed as a potential source of strategic rare earth elements REEs due to its high concentrations gt 1000 181 g/L of dissolved REEs as well as the middle rare earth element MREE enriched pattern exhibited by both coal mine- and metal mine-derived AMD in which some of the most energy-critical REEs are significantly concentrated...

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The antioxidative and immunity roles of chitosan

2020-6-30 ensp 0183 ensp The high-energy ball milling procedure was used to produce chitosan nanocrystalline powder Chitosan powder was obtained from Sigma-Aldrich St Louis MO USA which was prepared from crab shells with weight-average molar mass MW 190 kDa The produced powder was mixed for 40 h in a planetary ball mill at a ball ratio of 1 8...

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5 6 billion opioid pills flooded the state and rogue

2019-7-26 ensp 0183 ensp Pill mills found fertile ground in Florida where doctors were once allowed to prescribe and dispense the opioids in the same place That was the setup for the pain clinics Hall said...

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