Pencils aren’t supposed to flex. When I investigated, I found that the manufacturer had decided to mix sawdust with some sort of adhesive and use the resulting substance to make ...

The voltammetric behaviors of AC on modified pencil graphite electrode were investigated by cyclic voltammetry and differential pulse voltammetry in phosphate buffer solution. The voltammetric studies ...

HH Wills Physics Laboratories, School of Physics, University of Bristol, Bristol, BS8 1TL, UK ...