Enzymatic Urea Biosensor on Screen-Printed Carbon Electrodes Based on a Hierarchical Polypyrrole/Reduced Graphene Oxide Scaffold with Machine Learning- Assisted Analysis Roozbeh Jamaliyan, Afshin Farahbakhsh*, Javad Mohebbi Najm Abad, Susan Khosroyar, 10.57647/ijic.2026.1701.03 XML Requires Subscription PDF downloads: 59