Abstract Low atmospheric oxygen levels during the mid-Proterozoic moen rothbury faucet were occasionally interrupted by transient high oxygen levels.The cause of mid-Proterozoic ocean redox variability remains unclear.Here we investigate mercury chemostratigraphy across the Jixian section of North China Craton through two oxygenation intervals.Abno
We reveal a divergent issue associated with the mean-field theory for Bose gases in optical lattices constructed trailmaster challenger 200x by the widely used straightforward mean-field decoupling of the hopping term, where the corresponding mean-field Hamiltonian generally assumes no lower energy bound once the spatial dependence of the mean-fiel
We use the BISICLES adaptive socialstudiesscholar.com mesh ice sheet model to carry out one, two, and three century simulations of the fast-flowing ice streams of the West Antarctic Ice Sheet, deploying sub-kilometer resolution around the grounding line since coarser resolution results in substantial underestimation of the response.Each of the simu
Heavy metal contamination has occurred as a result of industrial civilization.Zinc, copper, chromium, and lead are the most prevalent heavy metal pollutants.Heavy metal contamination has arisen as a significant environmental issue on a global scale.Human and environmental health is at risk when soils are contaminated.as well as have poor engineerin