SARS-COV-2: THE SECOND WAVE IN EUROPE

Although the SARS-CoV-2 virus has already undergone several mutations, the impact of these mutations on its infectivity and virulence remains controversial.In this viewpoint, we present arguments suggesting that SARS-CoV-2 mutants responsible for the second wave have less virulence but much higher infectivity.This suggestion is based on the results

Abstract To further investigate the weakening Solar lighting kits effect of pore water pressure on intact rock mechanics properties and characteristics of fracture surface after failure, direct shear tests of sandstone were conducted under different pore pressure.A 3D scanner was employed to digitize the morphology of the post-shear fracture surfac