Green approach for the synthesis of zinc oxide nanoparticles from methanolic stem extract of Andrographis paniculata and evaluation of antidiabetic activity: In silico GSK-3β analysis - Kumar Gopal Nithesh; Ali Mohammad; Raghunathanaidu Bharathi Doddla; Ahmed Syed Sagheer; Komalkumar Chandan; Ananth Gowda KM Doddi Hanumaiah; Prajwal Chamanahalli Balaraju; Shakeel Faiyaz (Green Processing and Synthesis)